Membrane is polymer. Medical search. Frequent questions

The polymer electrolyte membrane fuel cell (PEMFC) is a key element in establishing the hydrogen economy, since it directly converts chemical energy into electrical energy through an electrochemical reaction using hydrogen as a fuel [ 3 ]. (jecst.org)

The size of these regions determine the transport properties of ions moving through the membrane. (bl.uk)
It is proposed that the dominant effect on permselectivty in the membranes studied here is a modification of the interaction between ions and water within the membrane channels formed by a hydrated hydrophilic polymer. (bl.uk)
In the past decade, anion exchange membrane fuel cells (AEMFC), which convert chemical energy to electrical energy via the transport of negatively charged ions (anions) through a membrane, have received attention due to their low-cost and relative environment friendliness compared to other types of fuel cells. (solarpowerconference.com)
Unfortunately, most conventional membranes lack selectivity between monovalent ions, rendering their use in such applications infeasible. (aps.org)
This can influence structural and physicochemical properties of membranes (e.g. porosity, charge density, and mechanical stability) and introduce new functionalities, including heavy metal ions removal. (uwm.edu)
The performance of the nanocomposite membranes in removal of copper ions from water were also investigated. (uwm.edu)

The idea was that the hydrophilic polymer (PEO) would interact with water molecules and ionic species, and the hydrophobic polymer (PVC) would serve as an inert matrix, intimately tangled with the hydrophilic polymer to prevent its diffusion into the aqueous solution phase. (bl.uk)
By tuning the nanoscopic self-assembly of the ionic domains in the polymers, we are able to increase the cycle life of the device by impeding vanadium ion transport through the membrane while facilitating high conductivity in the electrolyte to maintain the battery current density. (nyu.edu)
The incorporation of the ionic liquid remarkably improves the thermal, ion-transport and interfacial properties of the polymer electrolyte, which, in combination with the wide electrochemical stability even at medium-high temperatures, allow high current rates without any appreciable lithium anode degradation. (preprints.org)
Battery tests carried out at 80 °C have shown excellent cycling performance and capacity retention even at high rates, never tackled by ionic liquid-free polymer electrolytes. (preprints.org)
Bioelectronic devices have the capability to read out both ionic and electrical signals, but their compatibility with biological membranes is somewhat limited. (edu.sa)
This talk will demonstrate how thinner ion-exchange membranes with higher ionic conductivity substantially reduces the energy footprint for MCDI - approximately 35 kT per ion removed with ED membranes to 15 kT per ion removed with new ion-exchange membranes. (aiche.org)
The talk will showcase how ex-situ properties of ion-exchange membranes, such as ionic conductivity, thickness, and permselectivity, are instrumental for lowering the energy footprint of MCDI. (aiche.org)

Surface and pore functionalization of commercial membranes was achieved by in-situ polymerization. (confex.com)
Selection of pore size and of pore density, combined to the choice of filter thickness, enable the manufacturing of track-etched membrane filters characterise by a wide range of water and of air flows. (environmental-expert.com)
Because of the homogeneity of the pore size and of the pore shape created by the track-etching process, track-etched membrane filters used for filtration retain all particles larger than the pore size on their flat and smooth surface. (environmental-expert.com)
bacteria retained by track-etched membrane filters bacteria retained by track-etched membrane filters Bacteria retained on the membrane surface after filtration of a sampling control through pores smaller than bacteria dimensions (pore size = 0.4 µm). (environmental-expert.com)
They have the solubility, purity and range of molecular weight needed to make hollow fiber, flat sheet and tubular membranes with the pore size and separation selectivity you need. (solvay.com)
Our results show that we can form high quality bilayers of both types and sense these particular interactions with them, discriminating between pore formation, in the case of α-hemolysin, and disruption of the bilayer, in the case of polymyxin B. The SALB formation method is compatible with many membrane compositions that will not form via common vesicle fusion methods and works well in microfluidic devices. (edu.sa)
Synthetic asymmetric polymeric membranes are the most widely used membrane type for filtration technologies such as ultrafiltration, nanofiltration, and reverse osmosis due to better control of the pore forming mechanism, higher flexibility, lower cost, and ease of operation compered to inorganic membranes. (uwm.edu)
Afterward, PES/Alumina nanocomposite membranes with optimized pore structure, mechanical and thermal stability, and permeability were synthesized. (uwm.edu)
Typical is use of NC membranes with pore sizes of 0.45 um suitable for capturing bacteria in a filtration process. (cdc.gov)

Supported lipid bilayers (SLBs) have served as useful biomimetics for a myriad of research topics involving biological membranes. (edu.sa)
Native membrane derived polymer-supported lipid bilayers (nSLBs) are poised to bridge the gap between live cell experiments and traditional model membrane architectures that by offering a combination of accessibility by surface sensitive analytical instrumentation and a composition which more closely resembles cellular membranes by displaying a diversity of endogenous membrane proteins, lipids, and carbohydrates. (lu.se)
We recently developed a generic method for producing polymer-supported lipid bilayers directly from cell-derived native membrane vesicles (NMVs). (lu.se)

In this iterative assembly process, each polymer layer acts as both a structural component of the final morphology and a template for directing the order of subsequent layers. (nature.com)
The effect of main synthesizing parameters (casting temperature and polymer concentration in the casting solution) on the morphology and performance of the membranes were investigated in order to optimize the performance of the prepared membranes. (uwm.edu)
The morphology and physio-chemical properties of the modified nanoparticles and membranes were investigated. (uwm.edu)
The surface morphology analysis of the membranes by FE-SEM demonstrated a uniform nanofibrous texture with an average fiber diameter of 594 ± 124 nm for PCL, 517 ± 159 nm for PCLHA, and 490 ± 162 nm for PCLMTA. (bvsalud.org)

82.35.Lr - Physical properties of polymers / 87.16.Dg - Membranes, bilayers, and vesicles / 44.05. (edpsciences.org)

The effect of the preparation procedure on the potential difference response of these membranes was investigated to correlate any structural changes to the membrane electrochemical behaviour. (bl.uk)
This talk will show how polymers with new chemical structures and physical patterning can be applied to different types of batteries and other electrochemical devices. (nyu.edu)
Polymer electrolyte membrane (PEM) used for fuel cells and water electrolyzers is permeable to hydrogen gas, and the permeation causes to decrease the performance as electrochemical system. (elsevierpure.com)

Poseidon liquid applied waterproof membrane is a polymer based coating which, after application, dries to a flexible waterproof membrane. (thenbs.com)
Breather membrane is a three layer highly breathable ,fully waterproof membrane ,constructed from high tensile spunbond polypropylene layers,combined with a microporous polypropylene film.The outer layer forms the funtional waterproof surface;the middle layer is the breathable waterproof membrane and the inner layer protects the membrane from abrasion and damage,also giving additional strengths. (bestcon-group.com)

In Polymer Electrolyte Fuel Cells 11 (1 ed., pp. 1423-1430). (elsevierpure.com)

The work described in this thesis was carried out as part of a project to explore the use of solid polymer electrolytes as pH electrodes, the properties of which would be superior to those of the fragile glass membranes traditionally used. (bl.uk)

Solvay's fluoropolymers and sulfone polymers are certified for food contact and are frequently used in applications using MF, UF, NF and RO filtration. (solvay.com)
Membrane filtration process led two step: first - microfiltration (MF) and second - ultrafiltration (UF). (olsztyn.pl)
Membrane filtration has become the focus of separation processes in different industries including water and waste water treatment. (uwm.edu)
Among the available polymers, polyethersulfones polymers (PES) demonstrate strong chemical and thermal stability, making them popular as basic materials for filtration and support materials for composite membranes. (uwm.edu)

To develop their membrane, the scientists used a novel method: they chemically bonded two commercially available polymers, poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) and poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) without using a crosslinking agent. (solarpowerconference.com)

Typical examples of such membranes are a reverse osmosis membrane and an ultrafiltration membrane. (justia.com)
For example, an ultrafiltration membrane made from polysulfone is excellent in pH resistance and heat resistance, but shows very poor resistance to organic solvents. (justia.com)
The objective of the study was to investigate the influence of membrane material and membrane cut off on transport and separation properties of ultrafiltration membranes, as well as verification of the possibility of membrane techniques application for the recovery of bioactive components isolated from chicken eggs. (olsztyn.pl)
During ultrafiltration asymmetric membranes were used that were made of polyethersulfone and regenerated cellulose, with cut off of a molecular weight equal to 10, 30, 50 and 100 kDa. (olsztyn.pl)
In this project, asymmetric ultrafiltration membranes were synthesized by phase inversion immersion precipitation method. (uwm.edu)

Acrylic acid was polymerized via free radicals and stabilized via cross-linkers, forming pH responsive polyacrylic acid (PAA) in porous polyvinylidene fluoride (PVDF) membranes. (confex.com)
In general, the term "selective permeable membrane" designates those membranes which prevent specific components contained in a liquid mixture, such as a solution or emulsion, from passing therethrough, and these membranes are generally anisotropic membranes having a structure wherein a surface layer containing dense and fine pores, i.e., skin layer is supported by a porous layer. (justia.com)
If common track-etched membrane filters are made of multi-angle pores, the flexibility of the beaming process enable us to achieve alternative porous structures. (environmental-expert.com)
In MCDI, the ion-exchange membranes do not serve as separator and they are employed to prevent co-ion adsorption to the porous carbon electrodes. (aiche.org)

In addition to optimizing the chemical structures of polymeric membranes, physical manipulations, such as surface patterning, can be employed to improve the performance in devices. (nyu.edu)

It is postulated that the membranes are a nano-scale composite structure comprising interpenetrating networks of hydrophobic and hydrophilic regions of size determined by the preparation procedure. (bl.uk)
Further, the polysulfone is too hydrophobic so that it is difficult to form a reverse osmosis membrane. (justia.com)
They are hydrophobic intrinsically and the application of such membranes is still limited by some challenges such as permeability and selectivity trade-off, and low resistance to fouling. (uwm.edu)
Choosing the appropriate silane group can alter the surface of an inorganic material from hydrophilic to hydrophobic and increase its affinity to functional groups of the polymer matrix [1, 2], and decrease the agglomeration of nanoparticles. (uwm.edu)
The water contact analysis demonstrated the hydrophobic nature of the membranes . (bvsalud.org)

Sialic acid (SA) is normally expressed on the cell membranes and is located at the terminal position of the sugar chains. (lu.se)
As cell membranes are both dynamic and compositionally complex, replicating these aspects in a model membrane are essential. (lu.se)

Technologies range from reverse osmosis (RO) to microfiltration (MF) for symmetric and asymmetric membranes. (solvay.com)

Membranes 2018 , 8 , 41. (preprints.org)

On both sides of the polymer electrolyte membrane that transmits protons, a hydrogen oxidation reaction catalyst layer and an oxygen reduction reaction catalyst layer are positioned, followed by the gasket, gas diffusion layer (GDL), bipolar plate, and end plate ( Fig. 1a ) [ 16 ]. (jecst.org)

With surface modification techniques, ion exchange polymers and reactive nanoparticles have been in-situ synthesized in the commercial microfiltration (MF) membranes for toxic metal and organic remediation from complicated water matrices (surface and groundwater). (confex.com)
Microfiltration, using cross flow technique membranes made from polypropylene with 0.2 μm pores, was used as the first step of cystatin isolation from egg white (initial fractionation of egg white). (olsztyn.pl)

To evaluate the tensile strength of PLGA membranes at different conditions of humidity and temperature. (bvsalud.org)
The dried PLGA membranes showed higher tensile strength than the membranes that were only either plasticized or cooled. (bvsalud.org)

On both sides of the membrane there is the same solvent. (edpsciences.org)
Both the upper and lower sides of the membrane utilise the same polymer compound, allowing secure and reliable seam welding. (armormat.com)

This thesis describes the development of the membrane preparation procedure from initially pure PEO gels to processed pure PEO membranes then co-cast composite PEO and PVC membranes and finally rotary evaporated PEO-PVC membranes. (bl.uk)
The fixed polymer-alumina composite film thus acts as a substrate for overlying assembly steps, leveraging the BCP's tendency to self-align and register to underlying surface features. (nature.com)

For the case of a 12-Crown-4-functionalized membrane, atomistic molecular dynamics simulations reveal a strong coupling between cation hydration and their sorption and diffusion in the membrane. (aps.org)
The reverse osmosis membrane is, as is well known in the art, able to separate water from an aqueous solution containing relatively low molecular weight compounds, as well as salts such as sodium chloride, and is used to desalt sea water and brine, treating waste water from industrial plants and in purifying sewage. (justia.com)
Polymers of intrinsic microporosity (PIMs) are a group of polymers with molecular sieve behaviour due to their rigid, contorted macromolecular backbones. (unizar.es)
A range of narrow molecular weights with controlled viscosities makes it easier to fine-tune dope solutions and optimize your membrane manufacturing process. (solvay.com)
A membrane osmometer is a device used to indirectly measure the number average molecular weight ( M n {\displaystyle M_{n}} ) of a polymer sample. (wikipedia.org)
We have recently presented a novel method for specific fluorescence labeling of SA molecular imprinted polymers (MIP). (lu.se)
What researchers have come up with is the molecular design of a self-assembling polymer that makes the plastic more robust. (lu.se)

Heretofore, as a material for preparing a selective permeable membrane of the above type, cellulose acetate has typically been used. (justia.com)
This cellulose acetate membrane, when used as a reverse osmosis membrane for aqueous solutions, is excellent in its water permeation rate and efficiency of preventing specific solutes from passing therethrough, but is not completely satisfactory in heat resistance, pH resistance, chemical resistance, bacteria resistance, etc. (justia.com)
In order to overcome the above problems of the cellulose acetate membrane, selective permeable membranes made from polymers such as polysulfone, aromatic polyamide, polyimide, polyamidoimide, polyamidohydrazide, etc. have been proposed. (justia.com)
With these selective permeable membranes, the above problems are solved to a certain extent, but they suffer from other disadvantages, such as that they are significantly inferior in permeation characteristics compared to the cellulose acetate membrane and that they are insufficient in chlorine resistance. (justia.com)
Polysulfone has become the polymer of choice for this life-saving application and offers several advantages over cellulose acetate. (solvay.com)
NC membranes are manufactured by dissolving cellulose nitrate or a mixture of cellulose nitrate and cellulose acetate in a solvent and casting the resulting 'honey-consistency' solution on an endless steel belt. (cdc.gov)

The physico-chemical characterization of the fabricated membranes was carried out using field emission scanning electron microscopy (FE-SEM)/Energy dispersive X-ray (EDX), X-ray diffraction (XRD), Raman spectroscopy , and contact angle analysis . (bvsalud.org)
This includes the design, synthesis and functionalization of complex macromolecular structures using a variety of polymerization strategies, as well as an extensive characterization of their structural, thermal, viscoelastic and transport properties such as detection of free volume dimensions in polymer materials. (lu.se)

An improvement in membrane permeability, control over diffusion selectivity and a reduction of the effect of physical ageing is expected by adding graphene as a nanofiller. (unizar.es)
The findings show that ion transport/rejection across the membrane is due to diffusion mediated by the ionized functional groups present in the membranes, rather than electromigration. (eurekalert.org)

Mixed matrix membranes (MMMs) synthesized by polymers and inorganic particles have been widely used in gas separation. (confex.com)
Silane coupling agents are used extensively in inorganic polymer composites such as mineral filled polymer composites. (uwm.edu)

For instance, by decreasing the vanadium permeability of the membrane by a factor of two, we have been able to double the lifetime of the device, which provides significant life-cycle cost savings. (nyu.edu)
We have also demonstrated membranes with nearly zero vanadium permeability that show 100 % coulombic efficiency in flow battery charge-discharge cycling tests. (nyu.edu)
Selective permeable membranes made from aromatic polyamide, polyamidoimide, and polyamidohydrazide show improved pH resistance, bacteria resistance, etc., but are inferior in chlorine resistance and in general, they do not have sufficiently great permeability and are limited in practical usefullness. (justia.com)

The presence of MTA and HA in the PCL membranes was also confirmed by Raman spectroscopy . (bvsalud.org)

Due to the lack of detergent solubilization and reconstitution steps, the nSLBs created using this approach contain essentially all of the native lipids, as well as the membrane-associated proteins and carbohydrates from the donor membrane. (lu.se)
Marie Skepö (PI), has in collaboration with Lise Arleth and Kresten Lindorff-Larsen at University of Copenhagen, and Jens Preben Morth at University of Oslo, been awarded 6.8 MNOK for studying the structure of membrane proteins under solution conditions. (lu.se)
The aim is to understand how the lipid environment influences the activity of membrane proteins, using the active transporter MgtA as benchmark system, and to investigate the dynamic fluctuations between lipid and protein in solution, utilising neutron and X-ray scattering in combination with computer simulations. (lu.se)

Polyethersulfone membrane with cut off 30 kDa was characterised by the highest yield of fractionated products with a high level of remaining specific biological activity. (olsztyn.pl)
The formation of lipid rafts and cavioli in biological membranes provides examples of cooperative association of lipids presumably assisted by the presence of cholesterol acting as a lineactant in the two-dimensional system of the membrane. (lu.se)

To this end, potentiometry was used to study ion transport in membranes which were composites of poly(vinyl chloride) and poly(ethylene oxide). (bl.uk)

PIMs are a type of liquid membrane in which the liquid phase, the extractant, is held within a polymeric network. (leitat.org)

The results indicate that emission from dental light curing units can affect the oral mucous membrane and may reduce its functional abilities. (who.int)
Exposure to relatively high vapor concentrations produces inflammation of mucous membranes. (cdc.gov)

One approach to overcoming selectivity limitations is to incorporate ligands into membranes which specifically interact with target cations in an aqueous environment. (aps.org)

We developed polymer-nanoparticle based MMMs with stimuli-responsive pores and high metal adsorption capacity, which allows the subsequent synthesis of metal/metal oxide nanoparticles for catalytic degradation of environmental pollutants in water. (confex.com)
This membrane nanocomposite shows robust performance in reductive and oxidative degradation of chlorinated organic compounds (e.g. trichloroethylene, TCE and polychlorinated biphenyls, PCBs). (confex.com)
Polymer stabilizers prevent the degradation of polymers which can be induced by light, heat, weathering, or oxygen. (marketsandmarkets.com)
The prepared chitin/gelatin membranes with or without GlcNAc were characterized by mechanical, swelling, enzymatic degradation, thermal and growth of NIH/3T3 fibroblast cell studies. (amrita.edu)

Membrane technology contributes among others to providing clean water globally and sustainable energy production. (utwente.nl)
It was shown that membranes prepared by co-casting polymers from solution were indeed stable in water and that the properties could be changed by change in fabrication procedure which changed the microstructure. (bl.uk)
By integration of nanofiltration and functionalized membranes, toxic metal oxyanions (e.g. selenium and arsenic) were significantly removed from the coal-fired power plant scrubber water. (confex.com)
After Membrane bonding with concrete, water can be blocked between membrane and concrete, which can improve the reliability. (shandongmile.com)
While toluene and water are useful solvent for many compounds, not all polymers are miscible in toluene or water. (wikipedia.org)
The performance of the membranes including solute rejection and water flux was also investigated. (uwm.edu)
The performance of the membranes was also examined in terms of Cu (II) ion removal from water as well as pure water flux measurements. (uwm.edu)
One technology capable of providing low energy water desalination of brackish water streams with over 30% thermodynamic efficiency is membrane capacitive deionization (MCDI). (aiche.org)
As an added precaution, membranes can be placed in a pan of water to eliminate any possibility of becoming dry during autoclaving. (cdc.gov)
The polymer membrane can also be applied to filter sand from sea water. (lu.se)

Professor Tae-Hyun Kim from Incheon National University, who led the study, explains, "A previous study made a similar attempt to fabricate anion exchange membranes (AEMs) by crosslinking PPO and SEBS with diamine as a crosslinking agent. (solarpowerconference.com)
We have used photopolymerization and a stereolithographic patterning 3D printing process to develop surface-patterned anion exchange membranes that have low resistance compares to their flat, unpatterned counterparts. (nyu.edu)
In this study, commercially available cation- and anion-exchange membranes were investigated by coupling in situ ambient pressure hard X-ray photoelectron spectroscopy with finite element analysis. (eurekalert.org)

This paper presents a model aiming to simulate startups and shutdowns of Polymer Electrolyte Membrane Fuel Cells, i.e. operation stages where a hydrogen-air front is propagating in the anode compartment from inlet to outlet. (univ-lorraine.fr)
Udel® PSU was used in the early 1980's to make the world's first commercial gas separation membrane able to separate hydrogen from ammonia purge-gas streams. (solvay.com)
High-performance polymers may also have a good fit with emerging polymer membrane applications including carbon dioxide removal (e.g., from natural gas), natural gas liquids removal and dehydration, hydrogen recovery from refinery wet gas and fuel gas streams, olefin/paraffin separations (e.g., propane/propylene) and carbon dioxide sequestration from flue gases. (solvay.com)

Membrane separation processes can help increase the recovery of valuable food products while reducing the volume of waste streams generated. (solvay.com)
These characterizations are of relevance for polymer electrolyte membranes, packaging materials, bioplastics, polymer coatings, and membranes for separation processes and controlled release. (lu.se)

The electrical properties of these membranes were correlated with the microscopic and macroscopic membrane structure and chemical composition. (bl.uk)

The Membrane Science and Technology cluster at the Polymer Centre Twente draws on the University of Twente's rich tradition of research in this field, bringing together 60 researchers from various scientific disciplines. (utwente.nl)
The Centre for Amphiphilic Polymers, CAP. (lu.se)

Membranes prepared by the various procedures were tested with thermal analysis, FTIR and polarised light optical spectroscopy to observe any trends in physical characteristics associated with structural changes. (bl.uk)

But while inexpensive, AEMFCs suffer from several major drawbacks such as low ion conductivity, low chemical stability of the membrane, and an overall lower performance rate than its counterparts. (solarpowerconference.com)
Membranes fabricated using this method were up to 10 um thin and had excellent mechanical strength, chemical stability, and conductivity at even a 95% room humidity. (solarpowerconference.com)

Practically all unit operations of process engineering can be redesigned as membrane unit operations (e. g. membrane distillation, membrane crystallization, membrane stripping, membrane scrubbing). (lu.se)

The protons are dealt with by the polymer membrane. (lu.se)

We only use high quality materials providing their intrinsic properties to all track-etched membrane filters: low extractable, low protein binding, negligible adsorption and absorption, biocompatibility, excellent chemical resistance and thermal stability. (environmental-expert.com)
Used polymer films provide their intrinsic properties to track-etched membrane filters: low extractable, low protein binding, negligible adsorption and absorption of filtrates to maximise critical solution recovery, biocompatibility, excellent chemical resistance and thermal stability. (environmental-expert.com)
Examples are protein-protein assembly, protein ionization and pKa values, peptide-membrane interactions. (lu.se)

This is expected to produce strong changes in the mechanical properties and the physical ageing of the membrane. (unizar.es)

Synthesis and Biocompatibility Evaluation of PCL Electrospun Membranes Coated with MTA/HA for Potential Application in Dental Pulp Capping. (bvsalud.org)

Polymers, Solutions, Gels and Phase Behavior. (lu.se)

Solute cannot cross the semipermeable membrane but the solvent is able to cross the membrane. (wikipedia.org)
For M n {\displaystyle M_{n}} below 30,000 grams per mole, the solute permeates through the membrane and the measurements are inaccurate. (wikipedia.org)

Great efforts are placed on controlling and studying the structure and properties of heterogeneous polymer systems such as block and graft copolymers, ionomers, blends, nano-composites and biopolymers. (lu.se)

Liquid applied polymer waterproof coating suitable for use in bathrooms, steam areas and wet rooms prior to tiling. (thenbs.com)
Hyflon® AD amorphous perfluoropolymers are suitable for polymeric gas separation membranes used in the separation of gases or vapors, the recovery of gases and the enrichment of air in pharmaceutical or chemical processing applications. (solvay.com)
Steam sterilization is the most widely employed sterilization process, and NC membranes are suitable for autoclaving. (cdc.gov)

A selective permeable membrane comprising a polyquinazolone-based polymer including a repeating unit represented by the formula ##STR1## wherein R.sup.1 is a tetravalent aromatic group, R.sup.2a and R.sup.2b are each independently, an alkyl group or aromatic group, and R.sup.3 is a divalent organic group. (justia.com)
This invention relates to selective permeable membranes made from polyquinazolone-based polymers. (justia.com)
Thus the heretofore proposed selective permeable membranes made from various polymers are, as described above, not entirely satisfactory in several respects. (justia.com)
Recently, a selective permeable membrane made from a polyquinazolone, in which quinazolone rings are connected by the carbon-carbon bond at the 2-position, -polyamide copolymer has been proposed as having excellent membrane characteristics. (justia.com)
An object of this invention is to provide a selective permeable membrane from a polyquinazolone-based polymer. (justia.com)

For good and for theta solvents (ideal polymers) we find scaling laws, whose exponents can in the latter case be easily understood from the behaviour of random walks. (edpsciences.org)

Together, these conferred a high overall performance to the membrane and to the corresponding fuel cell on which the scientists tested their membrane. (solarpowerconference.com)
This two volume set of Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology covers the fundamentals, performance, and in situ characterisation of PEMFCs and DMFCs. (chipsbooks.com)
The polymer electrolyte membrane fuel cell is being proposed for a number of power generation systems. (lboro.ac.uk)
This classification includes alkaline fuel cells, phosphoric acid fuel cells, polymer electrolyte membrane fuel cells (PEMFCs), molten carbonate fuel cells (MCFCs), and solid oxide fuel cells (SOFCs). (asminternational.org)
Low-temperature fuel cells , such as polymer electrolyte , alkaline, and phosphoric acid. (asminternational.org)
Low-temperature fuel cells, such as polymer electrolyte, alkaline, and phosphoric acid, and high-temperature fuel cells, such as molten carbonate and solid oxide, are discussed. (asminternational.org)
After the electric car and the plug-in hybrid come the fuel cells, according to Patric Jannasch, Professor of Polymer Technology at Lund University. (lu.se)
He came to Lund nearly four years ago to benefit from Kemicentrum's successful research on polymer membranes, a kind of plastic film that plays a key role in fuel cells. (lu.se)

Coverage includes membrane reactors and catalytic design (catalytic membrane reactors). (lu.se)

Toughness and chemical resistance along with hydrolytic and oxidative stability help membranes tolerate a variety of feed streams and cleaning methods. (solvay.com)

The relationships between macromolecular structure, microstructure and different materials properties of homogeneous and heterogeneous polymers are central within our research. (lu.se)

Iron and iron oxide nanoparticles were synthesized directly inside the polymer matrix, which provides added benefits of eliminating the particle aggregation and leaching. (confex.com)
Iron nanoparticles were also synthesized in the membrane module. (confex.com)
Incorporation of nanoparticles such as titania (TiO2), alumina (Al2O3), silica (SiO2), silver and many others into PES membranes has been a recent trend in membrane research. (uwm.edu)

While the AEMs displayed excellent mechanical stability, the use of diamine could have led to different reactions other than those between PPO and SEBS, which made it difficult to control the properties of the resultant membrane. (solarpowerconference.com)
We have recently demonstrated new ion-conducting polymer membranes that have achieved excellent performance and long-lifetime stability in vanadium redox flow batteries, a leading technology candidate for deployment in renewable power networks and grid-scale energy storage systems with sizes ranging from 10s to 100s of megawatts. (nyu.edu)

Furthermore, an aromatic polyimide membrane which has heretofore been proposed is not sufficient in alkali resistance and in general, not sufficient in permiability although it has excellent heat resistance. (justia.com)
Thus, the aromatic polyimide membrane is of low practical value from the view point of both performance and cost. (justia.com)

Anatomy46

Organisms10

Diseases2

Chemicals and Drugs94

Analytical, Diagnostic and Therapeutic Techniques and Equipment40

Phenomena and Processes57

Disciplines and Occupations6

Technology, Industry, Agriculture26

Information Science3

Health Care1

PEMFC1

Ions6

Ionic7

Pore9

Lipid bilayers3

Morphology4

Vesicles1

Electrochemical3

Waterproof Membrane2

Electrolyte fuel cells1

Electrolytes1

Filtration4

Available polymers1

Ultrafiltration5

Porous4

Polymeric membranes1

Hydrophobic5

Cell membranes2

Asymmetric membranes1

20181

Catalyst layer1

Microfiltration2

Tensile strength2

Sides of the membrane2

Composite2

Molecular7

Cellulose acetate6

Characterization2

Diffusion2

Inorganic2

Permeability3

Raman1

Proteins3

Biological2

Poly1

PIMs1

Mucous2

Aqueous1

Degradation4

Water10

Anion3

Hydrogen3

Separation processes2

Macroscopic1

CenTre2

Structural1

Conductivity2

Distillation1

Protons1

Protein3

Physical1

Synthesis1

Gels1

Solute2

Composites1

Suitable3

Selective5

Behaviour1

Fuel8

Catalytic1

Oxidative1

Homogeneous1

Nanoparticles3

Stability2

Aromatic2