The quality or state of being wettable or the degree to which something can be wet. This is also the ability of any solid surface to be wetted when in contact with a liquid whose surface tension is reduced so that the liquid spreads over the surface of the solid.
Composite materials composed of an ion-leachable glass embedded in a polymeric matrix. They differ from GLASS IONOMER CEMENTS in that partially silanized glass particles are used to provide a direct bond to the resin matrix and the matrix is primarily formed by a light-activated, radical polymerization reaction.
Organic-inorganic hybrid polymers developed primarily for DENTAL RESTORATION. They typically contain a defined mixture of ORGANOSILICON COMPOUNDS; CERAMICS; and organic POLYMERS.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Characteristics or attributes of the outer boundaries of objects, including molecules.
The physical effects involving the presence of electric charges at rest and in motion.
The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.
Residue generated from combustion of coal or petroleum.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Complex petroleum hydrocarbons consisting mainly of residues from crude oil distillation. These liquid products include heating oils, stove oils, and furnace oils and are burned to generate energy.
The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily.
Condition of having pores or open spaces. This often refers to bones, bone implants, or bone cements, but can refer to the porous state of any solid substance.
Silicon polymers that contain alternate silicon and oxygen atoms in linear or cyclic molecular structures.
Polymeric resins containing a combination of SILOXANES and OXIRANES.
Synthetic or natural materials, other than DRUGS, that are used to replace or repair any body TISSUES or bodily function.
Property of membranes and other structures to permit passage of light, heat, gases, liquids, metabolites, and mineral ions.
A quality of cell membranes which permits the passage of solvents and solutes into and out of cells.
The study of those aspects of energy and matter in terms of elementary principles and laws. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Positively charged atoms, radicals or group of atoms with a valence of plus 1, which travel to the cathode or negative pole during electrolysis.
The voltage differences across a membrane. For cellular membranes they are computed by subtracting the voltage measured outside the membrane from the voltage measured inside the membrane. They result from differences of inside versus outside concentration of potassium, sodium, chloride, and other ions across cells' or ORGANELLES membranes. For excitable cells, the resting membrane potentials range between -30 and -100 millivolts. Physical, chemical, or electrical stimuli can make a membrane potential more negative (hyperpolarization), or less negative (depolarization).
Negatively charged atoms, radicals or groups of atoms which travel to the anode or positive pole during electrolysis.
The persistent eating of nonnutritive substances for a period of at least one month. (DSM-IV)
Sudden onset water phenomena with different speed of occurrence. These include flash floods, seasonal river floods, and coastal floods, associated with CYCLONIC STORMS; TIDALWAVES; and storm surges.
Carbonic acid calcium salt (CaCO3). An odorless, tasteless powder or crystal that occurs in nature. It is used therapeutically as a phosphate buffer in hemodialysis patients and as a calcium supplement.
The study, utilization, and manipulation of those microorganisms capable of economically producing desirable substances or changes in substances, and the control of undesirable microorganisms.
Electric power supply devices which convert biological energy, such as chemical energy of metabolism or mechanical energy of periodic movements, into electrical energy.
A condition resulting from the excessive retention of water with sodium depletion.
The legal authority or formal permission from authorities to carry on certain activities which by law or regulation require such permission. It may be applied to licensure of institutions as well as individuals.
Means or process of supplying water (as for a community) usually including reservoirs, tunnels, and pipelines and often the watershed from which the water is ultimately drawn. (Webster, 3d ed)

Denture plaque and adherence of Candida albicans to denture-base materials in vivo and in vitro. (1/210)

The aim of this paper is to review our understanding of the mechanisms and clinical significance of adhesion of C. albicans to denture-base materials in relation to denture plaque and denture-related stomatitis. Earlier reports in the literature of a 65% prevalence level of denture-related stomatitis seem to be exaggerated. More recent studies indicate that denture-related stomatitis is considerably less common, particularly in normal healthy subjects. The etiology of the condition is discussed in this review, and although much of the literature supports the view that the condition is strongly associated with C. albicans, this is not always so. In some subjects, the cause appears to be related to a non-specific plaque. This review also considers the role of denture plaque in the pathogenesis of denture-related stomatitis, the sequential development of denture plaque, and its colonization by Candida organisms. Designing controlled in vivo studies is difficult, and as a consequence, many investigators have had to resort to in vitro studies. The majority of these studies have attempted to investigate the hydrophobicity of C. albicans, relating the surface free-energy of denture-base materials, particularly acrylic resin, to that of the organism. Surprisingly little work has been directed at surface roughness and how it affects retention of organisms. Further, no attention has been paid to the properties and character of the surface, other than average surface roughness, as it affects adhesion. A comparison of results from in vitro studies on the effect on adhesion of pre-coating the surfaces of denture-base materials with saliva has produced equivocal conclusions. This is largely due to little standardization of experimental protocols between studies, particularly in the collection and handling of the saliva used. In conclusion, the review strongly supports the suggestion that adherence of C. albicans to denture-base materials in vitro is related to the hydrophobicity of the organism. The clinical significance of the observation and the mechanisms for the development and maturation of denture plaque are yet to be understood. There is a clear need for further investigation of other factors that may moderate the adhesion of organisms and subsequent colonization of denture-base materials.  (+info)

Effects of thermal cycling on dynamic viscoelastic properties of four commercial resins for crown and bridge. (2/210)

To elucidate the effects of thermal cycling on the viscoelastic properties of four commercial resins for crown and bridge, dynamic shear modulus (G'), mechanical loss tangent (tan delta), Knoop hardness, water sorption and appearance of specimen surfaces before and after thermal cycling test were determined. The changes of G' and tan delta for two materials were insignificant with increased repetitions of thermal cycling. Those of the other two materials were statistically significant: in particular, G' at temperatures above 60 degrees C was inclined to increase slightly and tan delta decreased considerably. While the Knoop hardness of the materials was a little decreased over a number of 75,000 thermal cycles, the water sorption almost attained an equilibrium in uptake after 14,000 thermal cycles. Furthermore, cracks on the specimen surface were observed after 37,500 to 75,000 thermal cycles. From these results, the deterioration of materials was observed as damage to the specimen surface. Moreover, it could be presumed that the materials would be further polymerized during the period of thermal cycling.  (+info)

Use of self-assembled monolayers of different wettabilities to study surface selection and primary adhesion processes of green algal (Enteromorpha) zoospores. (3/210)

We investigated surface selection and adhesion of motile zoospores of a green, macrofouling alga (Enteromorpha) to self-assembled monolayers (SAMs) having a range of wettabilities. The SAMs were formed from alkyl thiols terminated with methyl (CH(3)) or hydroxyl (OH) groups or mixtures of CH(3)- and OH-terminated alkyl thiols and were characterized by measuring the advancing contact angles and by X-ray photoelectron spectroscopy. There was a positive correlation between the number of spores that attached to the SAMs and increasing contact angle (hydrophobicity). Moreover, the sizes of the spore groups (adjacent spores touching) were larger on the hydrophobic SAMs. Video microscopy of a patterned arrangement of SAMs showed that more zoospores were engaged in swimming and "searching" above the hydrophobic sectors than above the hydrophilic sectors, suggesting that the cells were able to "sense" that the hydrophobic surfaces were more favorable for settlement. The results are discussed in relation to the attachment of microorganisms to substrata having different wettabilities.  (+info)

Femoral prosthetic heads and their significance in polyethylene wear. (4/210)

We used scanning electron microscopy to perform an ultrastructural analysis and two optical interferometric profilers to measure roughness on 40 prosthetic femoral heads. We expressed roughness as Ra (roughness average) value and Rsk (roughness skewness) value. Our results show that in order to obtain an ideal surface finish a low or not very high Ra value and a negative Rsk value are needed. The presence of depressions or holes (rather than scratches) with smooth (rather than sharp) edges seems to improve the lubrication and wettability properties.  (+info)

Intercalation compounds of layered materials for drug delivery use. II. Diclofenac sodium. (5/210)

Intercalation compounds of ternary layered inorganic materials, synthetic mica (Na-TSM), with diclofenac sodium (DFS) and its drug release characteristics were investigated. Hygroscopic DFS was selected as a model drug to verify the anti-humidity and anti-oxidation of the intercalation compounds. Na-TSM powder was first mixed with the reduced-type phosphatidylcholine (H-PC) solution of chloroform or ethanol. DFS was then mixed with these solutions and heated at 37 degrees C to prepare the ternary Na-TSM/H-PC/DFS compound. A remarkable phenomenon was observed in the drug release study. The net amount of DFS from the DFS powder decreased apparently after 20 min arising from the decomposition of DFS in acidic medium. On the other hand, the net amount of the released DFS from the intercalation compound was invariant. Thermal analyses study indicated that DFS powder was hygroscopic and a significant endothermic peak was observed accompanied by a large weight loss due to the dehydration of adsorbed water from 40 to 90 degrees C. On the other hand, no significant dehydration reaction was observed in the intercalation compounds even in the sample stored under humid conditions. The present results indicated that the ternary intercalation compound was resistant to acid in addition to anti-humidity.  (+info)

Polymer properties on resins composed of UDMA and methacrylates with the carboxyl group. (6/210)

The properties of dental matrix resins have been improved by synthesis of new monomers. However, except for improvements in water-resistance, monomers with better mechanical properties than Bis-GMA and UDMA could not being synthesized. Changing the point of emphasis, we tried to improve the mechanical properties controlling the matrix resin higher structure using noncovalent bonds. We prepared a matrix resin structured by UDMA, which is a high viscosity base monomer with imino groups, and by a low viscosity acidic monomer with carboxyl groups, which permits noncovalent bonds such as hydrogen bonds or electrostatic interaction with imino groups. The maximal mechanical strength for matrix resins structured by UDMA and an acidic monomer was obtained with a composition of imino groups and carboxyl groups at a ratio of 1:1. This mechanical strength value was higher than those obtained with UDMA resin or with a Bis-GMA/TEGDMA/UDMA resin with typical composition. The improvement in mechanical properties may be due to the complex based on noncovalent bonds, between the imino groups of UDMA and the carboxyl groups of the acidic monomers.  (+info)

Moisture-insensitive adhesives: reactivity with water and bond strength to wet and saliva-contaminated enamel. (7/210)

The purpose of this study was to investigate the reactivity with water of a moisture-insensitive orthodontic primer (Transbond MIP), in conjunction with a no-mix orthodontic adhesive (Unite), and a moisture-insensitive adhesive (Smartbond), and to assess their bond strength to wet and saliva-contaminated enamel relative to the conventional application of the no-mix adhesive. The reactivity of the moisture-insensitive products with water was investigated by micro-multiple internal reflectance Fourier transform infrared spectroscopy (micro-MIR FTIR). Sixty premolars were divided into two groups of 30 teeth each and, on the buccal enamel surfaces, a standardized volume (0.1 ml) of water or fresh whole saliva was applied. Standard edgewise stainless steel brackets were then bonded to enamel surfaces as follows: (a) Unite, (b) Unite with the Transbond MIP, and (c) Smartbond. The brackets were debonded under shear force at a speed of 2 mm/min and the debonded enamel surfaces were subjected to fractographic analysis. The statistical analysis of the bond strength values was performed by two-way ANOVA with condition (water, saliva) and adhesive type serving as discriminating variables (n = 10, alpha = 0.05). The results of the fractographic analysis were evaluated by chi 2 test (alpha = 0.05). FTIR analysis showed that only Smartbond set in the presence of water. Application of water in Transbond MIP increased the extent of carboxyl ionization without inducing any setting reaction. Transbond MIP did not improve bond strength values when combined with the no-mix adhesive. Most adhesive-enamel condition combinations showed a trend to present lower bond strength in the presence of saliva; however, this was not confirmed statistically. Fractography of enamel and bracket base surfaces showed that Unite + Transbond MIP resulted in the most adhesive fractures (leaving no resin on enamel surface), whereas Smartbond presented the highest frequency of cohesive fractures (adhesive left on bracket and enamel surfaces).  (+info)

Radiation effects of carbon ions and gamma ray on UDMA based dental resin. (8/210)

The radiation effects on the mechanical and physical properties of photo-polymerized UDMA resin without filler was investigated by various mechanical tests and spectroscopic measurements. The radiation sources were carbon ion (12C ion) and gamma ray (gamma-ray). With 640 Gy of 12C ion radiation, Vickers hardness increased by about 40%, the degree of abrasion decreased by 30%, and the flexural strength increased by 20%. With the same dose of gamma-ray radiation, only Vickers hardness increased by 19%. The spectra taken by the Fourier Transform Infrared Spectrometer (FT-IR), Raman spectroscopy, and Fluorescence spectrophotometer showed little change in the peak configuration and background intensities. The relative degree of conversion (DC) of carbon double bonds by radiation to the state of non-radiated samples were estimated by FT-IR. Spectroscopic results were indicative for the formation of cross-linking between carbon chains. Cross-linking of carbon molecules induced by radiation might be one of the reasons for the improved mechanical properties of UDMA resin.  (+info)

The surface wettability of ACNTs is important for the development of hybrid nano-materials to perform various functions. However, as-grown ACNTs are super-hydrophobic due to the large proportions of air trapping. By using O2 plasma etching, the surface wettability of ACNTs can be tuned from super-hydrophobic to hydrophobic, and then to hydrophilic by adjusting the flow rate of O2 gas during the etching process. Moreover, it was found that the surface wettability could be recovered by removing the top part of O2 plasma treated CNTs. Combining with laser-pruning technology, ACNT films with different kinds of patterns can be produced. Thus, CNT films with patterns of controlled wettability were produced and these can act as templates for the selective assembly of various nano-particles such as PS particles, CdTe quantum dots, and fluorescent particles ...
TY - CONF. T1 - Wettability alteration of sandstone with zinc oxide nano-particles. AU - Tola, Sreu. AU - Sasaki, Kyuro. AU - Sugai, Yuichi. PY - 2017/1/1. Y1 - 2017/1/1. N2 - In this research, we have investigated wettability alteration of sandstone and crude oil surfaces contacting nanofluids formulated by ZnO nanoparticles. The ZnO nanofluid was mixed by dispersing into water solution of Sodium Dodecyl Sulfate that is an anionic surfactant. ZnO concentration (w/w) in the fluid ranges from 500 ppm to 5000 ppm. Oil film spread on glass plate and surface of Berea sandstone saturated by light crude oil were used to measure fluid wettability evaluated by the contact angle of fluid droplets with the sessile drop methods. It has been confirmed that the ZnO nanofluid has a potential to shift wettability to more water wet condition on the surfaces of oil film and sandstone saturated by oil.. AB - In this research, we have investigated wettability alteration of sandstone and crude oil surfaces ...
CO2-rock wettability is a key factor which determines the fluid dynamics and CO2 geo-storage capacity. However, the full understanding of real reservoir CO2-wettability is yet to be gained. We thus systematically analysed the wettability of CO2/brine/South West Hub sandstones at various pressures (0.1 MPa, 5 MPa, 10 MPa, 15 MPa, and 20 MPa) at 334 K. A new procedure based on organic carbon isotope tracking (δ13Corg) was proposed to eliminate the effect of artificial organic matter introduced by drilling mud penetration. The results indicate that the advancing (θa) and receding (θr) water contact angles for the CO2/brine/South West Hub sandstone system increase with increase in pressure (ranging from 71° to 118° and 66° to 111°). It can thus be suggested that the system is weakly water-wet to intermediate-wet. When the samples were treated with dichloromethane, a slight decline in organic content was observed leading to slight decrease in water contact angles (i.e. TOC decreased from 0.019% to 0
Surface property of rock affects oil recovery during water flooding. Oil-wet polar substances adsorbed on the surface of the rock will gradually be desorbed during water flooding, and original reservoir wettability will change towards water-wet, and the change will reduce the residual oil saturation and improve the oil displacement efficiency. However there is a lack of an accurate description of wettability alternation model during long-term water flooding and it will lead to difficulties in history match and unreliable forecasts using reservoir simulators. This paper summarizes the mechanism of wettability variation and characterizes the adsorption of polar substance during long-term water flooding from injecting water or aquifer and relates the residual oil saturation and relative permeability to the polar substance adsorbed on clay and pore volumes of flooding water. A mathematical model is presented to simulate the long-term water flooding and the model is validated with experimental results. The
We report the influence of polyelectrolyte (PE) multilayer films prepared from poly(styrene sulfonate) - poly(acrylic acid) (PSS-PAA) blends, deposited in alternation with poly(allylamine hydrochloride) (PAH), on film wettability and the adsorption behavior of the protein immunoglobulin G (IgG). Variations in the chemical composition of the PAH/(PSS-PAA) multilayer films, controlled by the PSS/PAA blend ratio in the dipping solutions, were used to systematically control film thickness, surface morphology, surface wettability, and IgG adsorption. Spectroscopic ellipsometry measurements indicate that increasing the PSS content in the blend solutions results in a systematic decrease in film thickness. Increasing the PSS content in the blend solutions also leads to a reduction in film surface roughness (as measured by atomic force microscopy), with a corresponding increase in surface hydrophobicity. Advancing contact angles (θ) range from 7° for PAH/PAA films through to 53° for PAH/PSS films. ...
This paper presents systematic studies of hydrophilic metal oxide nanoparticles (NPs) dispersed in brine intended to reveal their potential to enhance oil recovery (EOR) in various rock wettability systems. The stability in suspension (nanofluid) of the NPs has been identified as a key factor related to their use as an EOR agent. Experimental techniques have been developed for nanofluid stability using three coupled methods: direct visual observation, surface conductivity and particle size measurements. The use of a dispersant has been investigated and has been shown to successfully improve metal oxide nanofluid stability as a function of its concentration. The dispersant alters the nanofluid properties, i.e. surface conductivity, pH and particle size distribution. A two-phase coreflood experiment was conducted by injecting the stable nanofluids as a tertiary process (nano-EOR) through core plugs with various wettabilities ranging from water-wet to oil-wet. The combination of metal oxide ...
1]. This can lead to many different forms of wettability. The wettability of a system can range from strongly water wet to strongly oil wet. When the rock has equal preference for both oil and water, the system has neutral or intermediate wettability. Fractional wettability is a condition when different areas of the core have different wetting preferences. There is also a special case of fractional wettability, called mixed wettability, where the small pores are water wet and the large pores are oil wet.. There are two methods of evaluating the relative permeability of each phase: steady state and unsteady state. Each method has its own advantages and disadvantages, however most researchers say that the unsteady state method should not be used. The experimental procedure to evaluate relative permeability of two-phase flow is easy, so a lot of relative permeability data were collected. However, for three-phase flow, the procedure is quite complicated so not many experiments were carried out. ...
A method of treating a low hydrohead fibrous porous web material to increase its retentive wettability, by at least about 50%, as compared to untreated low hydrohead web material, is disclosed. The increase in retentive wettability is evidenced by the increase in the average number of runoff tests that the treated web material can sustain without unacceptable runoff is disclosed. The invention is also directed to products prepared or preparable by the process.
Excessive water formation inside the polymer electrolyte membrane (PEM) fuel cells structures leads to the flooding of the cathode gas diffusion layer (GDL) and cathode gas flow channels. This results in a negative impact on water management and the overall cell performance. Liquid water generated in the cathode catalyst layer and the water moved from anode to cathode side due to electro-osmotic drag transport through the GDL to reach the gas flow field channels, where it is removed by air cathode gas stream. Due to high and uniform capillary force distribution effect of the pores through the GDL plane and surface tension between the water droplets and gas flow field channels surfaces, liquid water tends to block/fill the pores of the GDL and stick to the surface of the GDL and gas flow channels. Therefore, it is difficult to remove the trapped water in GDL structure which can lead to flood of the PEM fuel cell. The GDL surfaces are commonly treated uniformly with a hydrophobic material in ...
A wettability switchable surface will be demonstrated to study the contact angle hysteresis of liquid droplet. Manipulation of surface wettability can be applied in the field of biomedical (cell-surface interaction) and fluids dynamics (friction reduction). The surface affinity of Polypyrrole (PPy) film can be switched reversibly between hydrophobic and hydrophilic by reduction and oxidation, which needs very low voltage, e.g. -0.5V to 2V. The experiments show that water droplet has 116.5° and 71.5° contact angle on an oxidized and reduced planar PPy surface respectively. According to Wenzel theory, increase of surface roughness can amplify either hydrophobicity or hydrophilicity, which promotes contact angle hysteresis. In this study, a PPy film is integrated with MEMS techniques to create a patterned 3D structure. The dynamic contact angle of water droplet on the fabricated structure will be measured and discussed in this paper. The impact of pattern geometry and oxidized state of PPy is also
Materials Science, Commodity Research and Production Certification O. V. Romankevich, O. A. Garanina, N. A. Bardash. Capillarity of Fibrous Materials. Thermodynamics of wettability of fibrous materials within the Guggenheim approach to description of surface phenomenons isconsidered. Characteristic of relative change of free energy of interfacial layer in wetting ΔGrelcan be determined without valuecapillary tension and can be used to characteristic of chemical structure changing of fibers surface after carrying out finishingprocesses. Key words: capillarity, criteria wettability, phase, guggenheim, the contact angle. E. V. Voloskova, V. A. Poluboyarov, L. K. Baykina, F. K. Gorbunov The Influence of the Nano-dispersed Ceramic Particles on the Properties of the Films on the Basis of Molecular Collagen. The work proposes the way of change of physical and mechanical parameters of films on the basis of molecular collagen by modifying them with ceramic nanoparticles. It is shown that the ...
Purpose: : Ideally, soft contact lenses (SCLs) should be highly wettable and immune to oily and proteinaceous tear-film deposits during wear. Therefore, it is important to assess SCL wettability performance when the lens is in contact with human tear film especially the lipid layer. For the first time, we devise and evaluate an in-vitro blink-cycle cell that mimics contact-lens exposure to the human-eye environment during blinking and that permits contact-angle assessment. Methods: : An in-vitro blink-cycle cell was designed to measure contact angles of SCLs during model blink cycles. A syringe pump flows an artificial tear solution into and out of a blink-cycle cell, thereby raising and lowering the liquid level above and below the surface of the lens. The artificial tear solution contains phosphate-buffered saline (PBS), mucin, and tear-film proteins. Importantly, a model tear lipid is spread over the air/water interface to reflect exposure to meibomian lipids. One blink cycle corresponds to ...
TY - JOUR. T1 - Molecular Dynamics Simulations of Wettability, Thermal Transport, and Interfacial Liquid Structuring at the Nanoscale in Polar Solid-Liquid Interfaces. AU - Gonzalez-Valle, C. Ulises. AU - Ramos-Alvarado, Bladimir. N1 - Funding Information: This research was supported in part by startup funds from The Pennsylvania State University. C.U.G.-V. was partially supported by the National Council on Science and Technology, Mexico, under the Scholarship Program 2018-000009-01EXTF-00048. Publisher Copyright: © PY - 2021/4/23. Y1 - 2021/4/23. N2 - Engineering nano- and microscale systems for water filtration, drug delivery, and biosensing is enabled by the intrinsic interactions of ionic compounds in aqueous environments and limited by our understanding of these polar solid-liquid interfaces. Particularly, the fundamental understanding of the electrostatic properties of the inner pore surface of alumina nanoporous membranes could lead to performance enhancement for evaporation and ...
At the University of Twente (the Netherlands) within the MESA+ institute for nanotechnology a PhD position is available aimed at understanding physico-chemical aspects of the interaction of carbonate minerals with complex aqueous and non-aqueous fluids. We are interested in growth, dissolution, wettability, and adsorption phenomena in the context of enhanced oil recovery (EOR). The position is embedded in a larger program in collaboration with an industrial partner that involves in total 5 temporary researchers in Twente.. The PCF group is part of the MESA+ Institute for Nanotechnology, which offers advanced characterization and fabrication tools on the nanoscale as well as a stimulating environment with more than 250 PhD students working on various aspects of nanoscience and technology.. The research goal of the Physics of Complex Fluids (PCF) group is to understand and control the physical and chemical properties of solid-liquid interfaces across multiple scales ranging from atomic scale ...
Method of improving wetting and adhesive properties of dielectric materials by injecting electrical charges into the substrate under conditions such that the primary effect on the surface is that of charging so that improved wettability of the surface will be achieved. Flowable materials are then applied to the surface and cured in situ to permanently adhere the flowable materials to the surface.
This thesis is a part of the ongoing project, Oil recovery from fractured chalk reservoirs, which is a collaboration between the Reservoir Physics Group at the University of Bergen and ConocoPhillips Research Center in Bartlesville, Oklahoma. The project was initiated in 1990 and for the last 15 years about 30 Master and PhD candidates have graduated and, mainly employed by the oil industry. Dedicated candidates combined with professional guidance and stable funding has been a key to the success of this long term research project. Early work in this project report experiments on large chalk blocks subjected to water floods. The dynamics of the water front propagation during water floods were monitored by nuclear tracer imaging for homogeneous whole blocks and when fractured. The impact of the fractures on the water flood could then be investigated. Emphasis was on the effect of wettability condition on the recovery mechanism. In addition to the saturation monitoring system, attempts to measure ...
Wei, Xin, Liu, Yufeng, Zhou, Hua, Chen, Feng, Wang, Hongxia, Ji, Zhongli, Chase, George G. and Lin, Tong 2020, Substantial Improvement of Oil Aerosol Filtration Performance Using In-Plane Asymmetric Wettability, ACS Applied Materials and Interfaces, vol. 12, no. 25, pp. 28852-28860, doi: 10.1021/acsami.0c06349. ...
Authors: Khang, Gilson , Lee, Sang Jin , Lee, Jin Ho , Kim, Yong Sik , Lee, Hai Bang Article Type: Research Article Abstract: Chemogradient surfaces whose properties are changed gradually along the sample length are of particular interest for the basic studies of the interaction between biological species and surfaces since the effect of a selected property can be examined in a single experiment on one surface. A wettability chemogradient on the poly(l‐lactide‐co‐glycolide) (PLGA) films by treating them in air with corona from a knife‐type electrode whose power increases gradually along the sample length. The PLGA surfaces oxidized gradually with the increasing corona power, and the wettability chemogradient was created on the surfaces as evidenced by the measurement of water contact angles and …electron spectroscopy for chemical analysis. The wettability chemogradient PLGA surfaces prepared were used to investigate the interaction of fibroblast cells in terms of the surface ...
Table 4.1. Water contact angles for self assembled monolayer surfaces on Au. Standard deviations are given in parentheses. A value of 0 indicates a low and ill defined angle. Samples of 180 and 181 used for these experiments were prepared using the method described in section 3.1.6.. The values for modified surfaces are significantly different from the bare gold samples indicating that SAM formation was successful. The observed angles fall into classes which parallel the gross structure of the molecules comprising the SAM. The amine and pyridine functionalized surfaces, 180, 181 and 184, exhibit lower advancing contact angles than the porphyrin monolayers. Monolayers terminated by polar functional groups have previously been reported to give rise to low qa.19 The mono- and di-thiol porphyrins, 227 - 229 and 223 - 225, all display qa in the range 102 - 108 consistent with a relatively hydrophobic surface, a result unsurprising given the alkyl substituents at the porphyrin periphery. qa of the ...
This thesis summarises the findings made in NFR-funded project Capillary Pressure and Capillary Heterogeneities. The focus has been to determine the impact on oil recovery from wettability and fractures in carbonate rocks. Secondly a new method for measuring capillary pressure has been developed. The results of this work are reported in this thesis. The work presented in this thesis has improved the understanding of the interaction between wettability and fractures on the production mechanisms in carbonate reservoirs, in different directions. Figure 1 gives an overview of the project Capillary Pressures and Capillary Heterogeneities, its fundamental building blocks and the interaction between them to better understand how main conclusions in this study may be drawn; Building block 1: A reproducible method for altering wettability has been developed, and continuously improved throughout the study. Feed-back from the large scale block experiments have actively been used to improve the ...
TY - JOUR. T1 - Why is it difficult to wash aphids off from superhydrophobic kale?. AU - Damle, Viraj G.. AU - Linder, Rubin. AU - Sun, Xiaoda. AU - Kemme, Nicholas. AU - Majure, Lucas C.. AU - Rykaczewski, Konrad. PY - 2016/10/3. Y1 - 2016/10/3. N2 - Many varieties of the cabbage family have leaves covered with superhydrophobic epicuticular wax, which provides them with self-cleaning characteristics. Since the wax also lowers insect adhesion, rinsing of the leaves with water should be an effective way of removing the insects. Conversely, we report that superhydrophobicity of tuscan kale increases resistance of aphids to hydrodynamic removal. The exterior surface of the insects is also superhydrophobic and acts as an extension of the leafs surface. As a result even at moderate impact velocities impinging water drops cannot penetrate under the pests. Consequently, liquid impact aids the insects adhesion by increasing the normal compressive forces they experience. We show that on a hydrophilic ...
Calculation of surface free energy (SFE) from contact angle results, measurement of contact angles on solids yields data that reflect the thermodynamics of a liquid/solid interaction.
TY - JOUR. T1 - Antibacterial properties and chemical stability of superhydrophobic silver-containing surface produced by sol-gel route. AU - Heinonen, S. AU - Huttunen-Saarivirta, E. AU - Nikkanen, J-P. AU - Raulio, Mari. AU - Priha, Outi. AU - Laakso, J. AU - Storgårds, Erna. AU - Levänen, E. PY - 2014. Y1 - 2014. N2 - Superhydrophobic surface with and without nano-sized silver particles (AgNPs) using a sol-gel technique were prepared for antibacterial and chemical stability tests and electrochemical characterization. Antibacterial tests showed that the surface with AgNPs reduced the number of the bacteria. However, to be used in long-term industrial applications, the surfaces are required to have sufficient chemical stability in the operation environment. This is why the stability of the produced surfaces was studied as a function of pH value of the solution. According the results, the produced surfaces are stable in neutral environments but release silver ions at high rates and dissolve or ...
The common classifications of hydrophobic and hydrophilic arose from the sessile drop method. In our study, all materials tested appeared to be more or less hydrophobic, as demonstrated by their high water contact angle reading. The PMMA (AMO DuraLens PS 101A), AcrySof (Alcon), the Siflex 4 and the Flex 60 have similar water contact angles (73.2, 73.3, 75.4 and 75.7 , respectively). The AMO soft acrylic Sensar had a somewhat higher water contact angle (81.7 ). Using the sessile drop method, we saw the influence of the trifluoroethylene component of the material. In the hydrophobic environment of the air, the fluorinated component of the Sensar material surfaced and thereby increased the water contact angle of the material so that its value was somewhat higher than that of PMMA. We saw relatively small differences between most materials with highest values for the heparin-surface-modified material; that is, critical surface tension values for these materials were similar. Thus, we would expect ...
In this paper, we detail how microantennae dedicated to Magnetic Resonance Imaging (MRI) can benefit from the advantages offered by polymer substrates, especially flexibility and dielectric properties. We present a monolithic and wireless design based on the transmission lines between conductor windings on both sides of a dielectric substrate and its fabrication process. This last one requires specific plasma treatments to improve polymer/metal adhesion. We have led a comparative study on the effects of the ageing time on the wettability and the metal adhesion to Kapton and Teflon surfaces. Correlation between wettability (water contact angle) and adhesion (tensile strength) has been established. Then, the use of PolyDiMethylSiloxane (PDMS) as biocompatible packaging material and the optimization of its thickness allows us to conserve suitable f0 and Q values in a conducting environment such as the biological tissues. These studies allow us to perform 7 Tesla in vivo MRI of the rat brain with a high
Highly hydrophobic surfaces have numerous useful properties; for example, they can shed water, be self-cleaning, and prevent fogging (1, 2). Surface hydrophobicity is generally characterized with contact angle (CA) goniometry. With a history of more than 200 years (3), the measurement of CAs was and still is considered the gold standard in wettability characterization, serving to benchmark surfaces across the entire wettability spectrum from superhydrophilic (CA of 0°) to superhydrophobic (CA of 150° to 180°). However, apart from a few reports [e.g., (4-8)], the inherent measurement inaccuracy of the CA goniometer has been largely overlooked by its users. The development of next-generation liquid-repellent coatings depends on raising awareness of the limitations of CA measurements and adopting more sensitive methods that measure forces. ...
A eutectic liquid (choline chloride and urea) that served as a templating agent in sol-gel processing was used to prepare thin silica films on glass microscope slides. Subsequent extraction of the eutectic liquid yielded a film with a rough surface. After treating the film surface with a fluoroalkyl silane, the surface became superhydrophobic with a contact angle not, vert, similar 170° and a contact angle hysteresis , 10°. The optical transmittance of the film coated on the glass slide was comparable to that of the microscope glass slide. Atomic Force Microscopy (AFM) was used to characterize the surface structures; a tipless probe allowed measurement of the force of interaction with superhydrophobic surfaces. The interaction force between the AFM probe and the superhydrophobic surface was reduced greatly compared to that between the probe and the flat surface treated with fluoroalkyl silane ...
A eutectic liquid (choline chloride and urea) that served as a templating agent in sol-gel processing was used to prepare thin silica films on glass microscope slides. Subsequent extraction of the eutectic liquid yielded a film with a rough surface. After treating the film surface with a fluoroalkyl silane, the surface became superhydrophobic with a contact angle not, vert, similar 170° and a contact angle hysteresis , 10°. The optical transmittance of the film coated on the glass slide was comparable to that of the microscope glass slide. Atomic Force Microscopy (AFM) was used to characterize the surface structures; a tipless probe allowed measurement of the force of interaction with superhydrophobic surfaces. The interaction force between the AFM probe and the superhydrophobic surface was reduced greatly compared to that between the probe and the flat surface treated with fluoroalkyl silane ...
TY - JOUR. T1 - The surface characterization and bioactivity of NANOZR in vitro. AU - Han, Jian Min. AU - Hong, Guang. AU - Matsui, Hiroyuki. AU - Shimizu, Yoshinaka. AU - Zheng, Gang. AU - Lin, Hong. AU - Sasaki, Keiichi. PY - 2014. Y1 - 2014. N2 - The purpose of this study was to evaluate the surface characterization and bioactivity of ceria-stabilized zirconia/alumina nanocomposite (NANOZR) in comparison to yttria-stabilized zirconia (3Y-TZP) and pure titanium (CpTi). Three-dimension surface morphology, surface wettability, bovine serum albumin adsorption rate, cell morphology, cell proliferation and ALP activity of three tested materials were measured. There were no significant differences in surface roughness, contact angle among the three materials. The ALP expression of NANOZR was higher than CpTi and 3Y-TZP at 14 and 21 days although bovine serum albumin adsorption rate, cell morphology; and cell proliferation was not different among the three materials. These results suggest that the ...
Superhydrophobic films are produced by a simple and low cost method. Silica (SiO(2)) nanoparticles are dispersed in solutions of Rhodorsil 224, a commercial poly(alkyl siloxane) which is used for the protection of outdoor cultural heritage objects, and the suspensions are sprayed on glass surfaces. It is shown that the siloxane-nanoparticle composite films prepared from dispersions of high particle concentrations (,= 0.5% w/v) exhibit superydrophobic properties (high static contact angle and small hysteresis) which can be rationalized by the Cassie-Baxter model, according to quantitative measurements obtained by SEM images. Siloxane-nanoparticle films are then deposited (sprayed) on Opuka, a fine-grained argillite which was used for the restoration of the castle of Prague. It is shown that the treated stone surfaces exhibit superydrophobic properties, similar to the treated glass surfaces. The efficacy of the superhydrophobic films to protect Opuka is evaluated by performing water contact ...
The sticking of product material to injection molding tools is a serious problem, which reduces productivity and reliability. Depositing alloy nitride coatings (TiN, ZrN, CrN, and TiAlCrN) using closed field unbalanced magnetron sputter ion plating and electrodeposition of chromium, and characterizing their surface free energies in the temperature range 20-120°C have led to the development of a non-sticking (with a low surface free energy) coating system for semiconductor IC packaging molding dies. The contact angles of water, diiodomethane and ethylene glycol on the coated surfaces were measured at temperatures in the range 20-120°C using a Dataphysics OCA-20 contact angle analyzer. The surface free energy of the coatings and their components (dispersion and polar) were calculated using the Owens-Wendt geometric mean approach. The surface roughness of these coatings were investigated by atomic force microscopy (AFM). The adhesion force of these coatings were measured using direct tensile ...
In November 2018, the research project Changing surface wettability by direct growth of metal organic frameworks on heat exchanger materials (Tropfenkondensation von Kälte- und Lösemitteln auf funktionalisierten Oberflächen für hocheffiziente Wärmeübertrager) was started at the IFW Dresden together with the Institute of Process Ingineering and Environmental Technology (TU Dresden). The project is based on our recent development of hierarchically structured metal-organic framework (MOF) films for applications as coatings with stable omniphobic surfaces (Scientific Reports 8 (2018) 15400). Films with omniphobic surfaces are important for condensation of fluids with a weak surface tension, which plays a crucial role for heat supply devices. The project is aimed to fabricate the optimized omniphobic surfaces using electrochemical deposition of MOFs, and to extend the processing procedure towards different designs suitable for application.. This project is funded by the European Regional ...
We present a modeling approach that enables numerical simulations of a boiling Van der Waals fluid based on the diffuse interface description. A boundary condition is implemented that allows in and out flux of mass at constant external pressure. In addition, a boundary condition for controlled wetting properties of the boiling surface is also proposed. We present isothermal verification cases for each element of our modeling approach. By using these two boundary conditions we are able to numerically access a system that contains the essential physics of the boiling process at microscopic scales. Evolution of bubbles under film boiling and nucleate boiling conditions are observed by varying boiling surface wettability. We observe flow patters around the three-phase contact line where the phase change is greatest. For a hydrophilic boiling surface, a complex flow pattern consistent with vapor recoil theory is observed.. ...
Dry areas/non-wetting (i.e., assessment of the disruption of the front surface wettability of the contact lens), as assessed by the investigator for each eye individually. Dry areas/non-wetting was rated on a 5-point scale: 0=none, 1=very slight, 2=slight, 3=moderate, 4=severe. The combined percentage of lenses assessed as none or very slight is reported. Lenses from both eyes contributed to the percentage ...
Superhydrophobic coatings and compositions and methods for preparing superhydrophobic coatings and compositions are described herein whereby the coatings and compositions are prepared under mild conditions, yet the methods are amenable to chemical functionalization of the coatings and components therein. The methods are useful for tuning and optimizing the physical properties of the coatings. In an embodiment, the coatings comprise nanostructured fluorinated silica colloids.
The work presented in this Thesis explores the properties and potential applications of superhydrophobic supports created using electroless deposition of rough silver onto copper wires which were then cut to expose hydrophilic tips. Small aqueous sample droplets were dispensed onto these supports and their Raman spectra were probed either directly or after drying to increase the concentration. It was found that the best way to dispense the droplets, (typically < 1 ul), was to use a pipette whose needle was itself superhydrophobic. When droplets of aqueous glucose, sucrose or mixtures of these were dried they formed viscous dome-shaped deposits in which the sugars were sufficiently concentrated to allow normal Raman measurements to be carried out. With melamine solutions and tear fluid the deposits were dry solids. Detection limits for sucrose, glucose and melamine were found to be 5 x 10-4 M, 2.5 X 10.3 M and 1 X 10.6 M, respectively. The concentration through evaporation approach was combined ...
As all the three extruders are running at similar speeds, the end product is developed with minimal handling. A negative point of this process is the amount of production loss occurred, in case any of the three extruders is not running efficiently or there is some problem with only one of the extruders.. Wire coating is generally done by the use of single screw extruders, in which the crosshead extrusion process is carried out. The job of the extruder is to melt the resin & forward it to the die at an even & constant melt pressure and temperature. The crosshead extrusion process is carried out by using a general equipment in the line, which includes following basic pieces:. ...
Selection of Optimal Hot Extrusion Process Parameters for AA6061-Fly Ash Composites: Using Simulation: 10.4018/IJMFMP.2018010104: The simulation of hot extrusion process is a challenging problem in process modeling because of very large deformations, strain rates and temperature changes
AB Specialty Silicones new line of silicone resin blends combines unique carriers with trimethylsiloxysilicate (TMS). Carrier fluid selection can be volatile or non-volatile and, when combined with the other ingredients in your formulation, ha
20 videos from 10 participants who had worn the same type of silicone hydrogel lens for at least 8 hours were analysed. We imaged the spread of tear-film over the lens surface after a blink, in the morning after lens insertion and also after 8 hours of lens wear. Using a customized, calibrated ImageJ macro the velocity of reflective particles in the videos was determined. The results were analyzed using R and ProFit.. ...
A hybrid solar dryer, direct solar energy dryer and open sun drying under the climatic conditions of Yola, Nigeria was used to dry tomato slices. The effect of these drying methods on the functional and sensory quality of the dried tomatoes was examined. The functional properties of the dried tomatoes slices were significantly different (p|0.05). In open sun dried tomatoes, the bulk density ranged from 0.56 - 0.62 g/ml, water absorption index (WAI) 436.33 - 475.67 gH2O/sample, water solubility index (WSI) 6.00 - 14.00, specific volume 1.61 - 1.78 ml/g and wettability 10.33 - 13.33 s for 4 - 8 mm thick tomato samples. For solar dried tomatoes, the bulk density ranged from 0.52 - 0.57 g/ml, the WAI ranged from 412.00 - 454.00 gH2O/sample, the water solubility index (WSI) range was 12.33 - 16.67, specific volume range was 1.73 - 1.90 ml/g and wettability ranged from 5.85 - 10.63 s for 4 - 8 mm thick tomato samples. For the hybrid dried tomatoes, the bulk density ranged from 0.50 - 0.54 g/ml, the WAI values
In areas like drug discovery where target compounds are increasingly polar, it is critical to have a reverse phase column that performs well under aqueous conditions. Retention is critical, but cannot come with troublesome secondary interactions. Likewise, phase collapse and shifting retention times need to be avoided. The answer is our Polaris line of polar-modified columns. From the collapse-resistant pore structure of our base silica, to the wettability engineered into the bonded phases, Polaris columns have been designed for high aqueous conditions. The combination of high phase density bonding, ultra pure silica, and silanol shielding leads to excellent peak shape among polar-modified columns.. As a family, Polaris offers a variety of polar modifications in both C18 and C8 chemistries.. Polaris C18-A ...
The main task of a petroleum reservoir engineer is to produce oil and gas reservoirs with maximum economic rate and reaching the ultimate recovery. Reservoir evaluation processes need a reservoir description as completely and accurately as possible using a variety of methods from seismic and well testing to logging, cuttings analysis and coring. These methods present the engineer with a valuable and wide range of scales of information to well evaluate the reservoir and control its performance and improve oil recovery. The main goal of core analysis is to reduce uncertainty in reservoir evaluation processes created by the uncertainty degree in the input parameters at the different levels from reserve estimate level to the enhancement of reservoir performance level. In order to reach these targets, the exact determination of certain petrophysical properties are necessary such as rock porosity, relative permeability, water saturation, and capillary pressure at all stages of reservoir life and rock ...
This article describes the development of a new method for evaluating wetting of a metal St-3 in dynamic systems of two immiscible liquids as an electrolyte and liquid hydrocarbon.
CytoDrop Slides for Metaphase Chromosome Analysis. CytoDrop Slides are specially manufactured to provide a uniformly wettable surface, for even spreading of samples edge to edge, every time. No more bad slides where samples pool or form rivulets. The wettability of each lot is measured with a surface analyzer and checked for uniform sample flow using the Scorpion™ Slide Preparation Robot. CytoDrop Slide packs are sealed to keep out moisture and are provided ready-to-use with no additional cleaning or treatment. Unopened slide packs retain uniform wettability for > 12 months.. CytoDrop Slide Highlights:. ...
Summary The complex physics of multiphase flow in porous media are usually modeled at the field scale using Darcy-type formulations. The key descriptors of such models are the relative permeabilities to each of the flowing phases. It is well known t
метод; способ; приём method for determination relative water wettability - метод определения относительной водосмачиваемости (пород); method for determination wettability - метод определения смачиваемости (пород) - airborne magnetometer method - air-hammer drilling method - airlift well operation method -.
Click here to report technical problems or to provide feedback on this system. For urgently needed technical support, phone 401-334-9902 between the hours of 8:30 AM and 6:00 PM Monday through Friday, US Eastern Standard Time (GMT -05:00), and provide support code 1438 ...
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A large portion of the paper focused on creating a hydrogel layer that was anchored properly to the substrate and could reversibly switch for many cycles. Some interesting ideas in the paper: - Hydrogels were defined as responsive materials composed of cross-linked flexible polymeric hydrophillic chains whore elastic networks can swell in water to the desired degree of hydration -They noted that hydrogels are shape-memory polymers and this allows for the repeatability of the process. Also noted was that hydrogels respond to a variety of stimuli: humidity, pH, etc. -In their intro, they gave a nice definition of superhydrophobicity: a very high water droplet contact angle and a very small advancing-receding hysteresis... a water droplet deposited on a superhydrophobic surface maintains its almost spherical shape and easily slides over the surface -The bio-inspiration for responsive superhydrophobic structures comes from: legs of water spiders and beetles. They use nanostructured ...
... the substrate under conditions such that the primary effect on the surface is that of charging so that improved wettability of ... This considers the measurement of wettability and adhesion at the macro level and does not consider very minute effects which ... 3. A process for adhering a flowable material permanently to the surface of a dielectric material by improving the wettability ... Effect of treatment conditions in a glow discharge on the wettability of PTFE. ibid. vol. 24, No. 1, 1990, pp. 64 66. ...
The results showed that FG40 provided the best wettability alteration effect with a concentration of 0.3% and FC911 at the ... In this paper, three different fluorosurfactants FG1105, FC911, and FG40 were evaluated for altering the wettability of ... is clear from investigations reported in the literature that gas production could be improved by altering the rock wettability ... Wettability Alteration of Sandstone by Chemical Treatments. Yan-ling Wang. ,1 Li Ma. ,1 Bao-jun Bai,2 Guan-cheng Jiang. ,3 Jia- ...
However there is a lack of an accurate description of wettability alternation model during long-term water flooding and it will ... This paper summarizes the mechanism of wettability variation and characterizes the adsorption of polar substance during long- ... and original reservoir wettability will change towards water-wet, and the change will reduce the residual oil saturation and ... low PV, initial wettability); -the residual oil saturation at (high PV, high water-wet wettability). ...
wettability and in-eye comfort. To determine if comfort and wettability vary. *between symptomatic and asymptomatic lens ... Contact Lens Wettability. The safety and scientific validity of this study is the responsibility of the study sponsor and ... vivo and ex vivo wettability of currently marketed contact lenses. Secondary Outcome Measures : *To determine if there is a ... The purpose of this study is to compare the wettability of contact lenses disinfected with three marketed contact lens care ...
Surface wettability plays a significant role in gecko adhesion underwater. Alyssa Y. Stark, Ila Badge, Nicholas A. Wucinich, ... Surface wettability plays a significant role in gecko adhesion underwater Message Subject (Your Name) has sent you a message ... In this study, we took into account the effect of surface wettability on adhesion to wet and dry surfaces by testing geckos on ... The ability of the toes to shed water droplets relies on the wettability of the toe pad, and, as such, a surface chemistry ...
The hydrophobic surface properties of structured poly-(p-xylylene) (PPX) films, as measured by water wettability, are studied ... Controlling the wettability and adhesion of nanostructured poly-(p-xylylene) films. *Boduroglu S ... The hydrophobic surface properties of structured poly-(p-xylylene) (PPX) films, as measured by water wettability, are studied ...
... thin films deposited on quartz substrates by the nebulized spray pyrolysis method were studied to investigate the wettability ... Sun M, Du Y, Hao W, Xu H, Yu Y, Wang T: Fabrication and wettability of ZnO nanorod array. J. Mater. Sci. Technol. 2009, 25: 53- ... Wettability of the film was studied by the measurement of the contact angles of water drops on the surface of the film. An ... Reversible wettability of the ZnO thin films after plasma treatment. Figure 3 shows the change in hydrophobicity of the ZnO ...
Wettability of southern pine veneer by phenol formaldehyde wood adhesives. Forest Products Journal 22(1):51-56. Related Search ... Wettability of southern pine veneer by phenol formaldehyde wood adhesives. *Influence of resin formulation variables on bond ...
389a) Insulin Stability and Fibrillation with Surfaces: Role of Surface Wettability. *Conference: AIChE Annual Meeting ... followed the loss of α-helix and gain in β-sheet as a result of exposure to a series of model surfaces differing in wettability ...
Texture and wettability of metallic lotus leaves C. Frankiewicz and D. Attinger, Nanoscale, 2016, 8, 3982 DOI: 10.1039/ ... These metallic surfaces are the first analog of lotus leaves, in terms of wettability, texture and repellency. A mechanistic ... model is also proposed to describe the influence of multiple tiers of roughness on wettability and repellency. This ...
Wettability and Adhesion, Volume 6 als Download. Jetzt eBook herunterladen & bequem mit Ihrem Tablet oder eBook Reader lesen. ... Produktinformationen zu „Contact Angle, Wettability and Adhesion, Volume 6 (eBook / PDF)". The topic of wettability (measured ... Wettability plays an essential role in many industrial processes, so an understanding of factors dictating wettability and how ... Contact Angle, Wettability and Adhesion, Volume 6 (eBook / PDF). Keine Kommentare vorhanden. Jetzt ersten Kommentar schreiben! ...
Enhanced wettability and moisture retention of cotton fabrics coated with self-suspended chitosan derivative. ... Gartner H, Li Y, Almenar E (2015) Improved wettability and adhesion of polylactic acid/chitosan coating for bio-based ... coated cotton fabric via hydrogen-bonding interaction without removing water but also improved the long-term wettability and ...
The increase in retentive wettability is evidenced by the increase in the average number of runoff tests that the treated web ... A method of treating a low hydrohead fibrous porous web material to increase its retentive wettability, by at least about 50%, ... provides improved wettability. Thomas et al 020 does not appear to address the question of retentive wettability because all of ... Accordingly, it has been a goal of those in the art to provide a porous web material which has an improved wettability. This ...
Wettability of southern pine veneer by phenol formaldehyde wood adhesives. *Wettability of southern pine veneer by phenol ... Effect of wood grain and veneer side on loblolly pine veneer wettability. Forest Products Journal. 48(6): 95-97.. Related ... Effect of wood grain and veneer side on loblolly pine veneer wettability ... on the wettability of loblolly pine veneer. Contact angle measurements were performed with phenol-formaldehyde resin and ...
1997) Wettability and relative permeability of Prudhoe Bay: A case study in mixed-wet reservoirs. SPE Reservoir Eng 12:58-65. ... A schematic of wettability and length scales in porous media flows. Right shows images of oil retained within the pore space of ... 2016) Wettability control on multiphase flow in patterned microfluidics. Proc Natl Acad Sci USA 113:10251-10256. ... Wettability in complex porous materials, the mixed-wet state, and its relationship to surface roughness. Ahmed AlRatrout, ...
Fast and reversibly switchable wettability induced by a photothermal effect.. [Jinseok Byun, Jihyun Shin, Seungchul Kwon, ... We report a novel approach for the fabrication of a photo-responsive surface with fast and reversibly switchable wettability ...
... Nat Mater. 2013 Jun;12(6):529-34. doi: 10.1038/ ... dynamic adjustments of optical transparency and wettability. In particular, we demonstrate simultaneous control of the films ...
Abstract In this research, we have investigated wettability alteration of sandstone and crude oil surfaces contacting ... Wettability is defined as the relative adhesion of two fluids to a solid surface. In petroleum reservoirs, wettability is one ... It has been confirmed that the ZnO nanofluid has a potential to shift wettability to more water wet condition on the surfaces ... Their result showed that cationic surfactant is more effective in altering wettability of oil-wet dolomite rock to more water- ...
The effect of temperature on wettability-altering process is caused by contribution from several parameters involving fluid/ ... The wettability of a hydrocarbon reservoir depends on how and to what extent organic components are adsorbed to the solid ... It was shown that there is a possible implication between change in IFT and partitioning with the wettability of the calcite ... Many authors have reported a shift in wettability of mineral surfaces toward water-wet at elevated temperatures.[6-9] ...
The wettability of the membranes was determined by water contact angle measurements. The wettability of the membranes was ... Exceptional wettability of 25 wt% PNIPAM sample can be explained using the results from DSC and TGA. Molecular interaction ... The change in wettability of PNIPAM due to reversible hydrogen bonding with water molecules makes them attractive for ... The wettability results demonstrated that all the PVDF/PNIPAM blend samples switched from hydrophilic to hydrophobic state when ...
Miscible, Wettability, Compositional, Relative Permeability, Hysteresis. Downloads. 8 in the last 30 days. 778 since 2007. Show ... A New Model of Trapping and Relative Permeability Hysteresis for All Wettability Characteristics. SPE J. 13 (3): 277-288. SPE- ... The Effect of Crude Oil Acid Fractions on Wettability As Studied by Interfacial Tension and Contact Angles. Journal of ... Phase compositions and rock-surface properties are used to calculate wettability and contact angles. The model is tuned to ...
4 Wettability results.. (A) Appearances of the water droplet pinned on the surface of the graphene/TPI hybrid film without ... Dynamic wettability of the graphene/TPI hybrid film by monitoring the liquid droplets on the slippery surface shown in Fig. 5. ... Bioinspired shape-memory graphene film with tunable wettability. By Jie Wang, Lingyu Sun, Minhan Zou, Wei Gao, Cihui Liu, ... Bioinspired shape-memory graphene film with tunable wettability. By Jie Wang, Lingyu Sun, Minhan Zou, Wei Gao, Cihui Liu, ...
Doping-Induced Tunable Wettability and Adhesion of Graphene journal, June 2016 * Ashraf, Ali; Wu, Yanbin; Wang, Michael Cai ... Wettability of Supported Monolayer Hexagonal Boron Nitride in Air journal, September 2016 * Li, Xuemei; Qiu, Hu; Liu, Xiaofei ... Wettability and friction of water on a MoS 2 nanosheet journal, March 2016 * Luan, Binquan; Zhou, Ruhong ... Time dependent wettability of graphite upon ambient exposure: The role of water adsorption journal, August 2014 * Amadei, Carlo ...
Preparation of metallic coatings with reversibly switchable wettability based on plasma spraying technology. by JCT Research ... Wettability before and after surface modification The wettability of the surface is influenced by the chemical composition and ... Keywords Plasma spray, Dual scale morphology, Superhydrophohicity, Reversibly switchable wettability Introduction Wettability ... 7a), the surface wettability will be enhanced due to the higher affinity of carboxylic groups to water. However, the ...
Interfacial tension and wettability in water-carbon dioxide systems: Experiments and self-consistent field modeling. Banerjee, ... This paper presents experimental and modeling results on water-CO2 interfacial tension (IFT) together with wettability studies ...
Wettability Alteration toIntermediate Gas-Wetting in Gas-Condensate Reservoirs at High Temperatures.SPEJ 12 (4): 397-407. SPE- ... Wettability Alteration inGas-Condensate Reservoirs to Mitigate Well Deliverability Loss by WaterBlocking. SPEREE 11 (4): in ... Then, the effect of wettability on the high-velocity coefficient in two-phase flow is investigated. Results show that when the ... Effect of Wettability on High-Velocity Coefficient in Two-Phase Gas/Liquid Flow ...
Wettability Determination and itsEffect on Recovery Efficiency. SPEJ 9 (1): 13-20;Trans., AIME, 246. SPE-2338-PA doi: 10.2118/ ... Effect of Wettability on WaterfloodRecovery for Crude-Oil/Brine/Rock Systems. SPERE 10 (1):40-46. SPE-22597-PA doi: 10.2118/ ... Reconstruction of Bereasandstone and pore-scale modelling of wettability effects. J. Pet. Sci.Eng. 39 (3-4): 177-199. doi: ... Impact of wettability alterationon two-phase flow characteristics of sandstones: A quasi-staticdescription. Water Resources ...
... Type. Doctoral thesis ... E.; Graue, A.; Ramsdal, J., In-Situ Wettability Distribution and Wetting Stability in Outcrop Chalk Aged in Crude Oil, pp. 337- ... Emphasis was on the effect of wettability condition on the recovery mechanism. In addition to the saturation monitoring system ... Improve imaging in order to study the details on fluid transfer across open fractures at different wettability conditions. ...
Fogging Control on LDPE/EVA Coextruded Films: Wettability Behavior and Its Correlation with Electric Performance. Miguel A. ... Fogging Control on LDPE/EVA Coextruded Films: Wettability Behavior and Its Correlation with Electric Performance. Membranes. ... "Fogging Control on LDPE/EVA Coextruded Films: Wettability Behavior and Its Correlation with Electric Performance." Membranes 7 ... Keywords: AC electrical conductivity; wettability; nonionic surfactants; ethylenevinyl acetate; low-density polyethylene; ...
The wettability gradient has been introduced through plane of the one side hydrophobic GDL by coating one side of non-coated ... The effects of wettability gradient on the water removal rate, droplet dynamics, and PEM fuel cell performance have been ... In addition, sandwich wettability GDL has been coated with a silica particle/ Polydimethylsiloxane (PDMS) composite. The ... The GDL wettability gradient has a significant impact on water removal rate, droplets dynamic characteristics, and ...

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