A method for producing an antimicrobial cellulose fiber. The method includes reacting a reactive compound with an antimicrobial agent to prepare a reactive antimicrobial compound, chemically fixing the reactive antimicrobial compound to a cellulose fiber through chemical bonding between the reactive compound and the cellulose fiber, and stabilizing the cellulose fiber structure. Further disclosed is an antimicrobial cellulose fiber produced by the method. The antimicrobial cellulose fiber is a human friendly material that has excellent antimicrobial activity and deodorizing performance. The antimicrobial cellulose fiber can be manufactured in the form of raw cotton, sliver, roving yarn, spun yarn, woven fabric, knitted fabric, non-woven fabric, etc. The antimicrobial cellulose fiber may be blended with other fibers, such as natural fibers and synthetic fibers.
The global cellulose fibers market is expected to reach USD 48.37 billion by 2025, according to a new report by Grand View Research, Inc. The increasing gap between the demand and production of natural cellulose fibers across various end-use industries is the major factor for the growth of the market. In addition, the rise in textile & apparel industries in developing and emerging economies is also anticipated to fuel the global market growth.. Increasing demand for eco-friendly and biodegradable fibers, especially in textile and hygiene industry is driving the cellulose fibers market. The production of synthetic or man-made fibers includes the industrial processing of wood pulp derived from botanical sources. However, the manufacturing of cellulose fibers entails mechanical and chemical processing of wood pulp. Viscose, triacetate, and acetate are the most common variants of rayon, which are man-made cellulose fibers used extensively across end-use industries.. The cellulose fibers market is ...
[50 Pages Report] Check for Discount on Global Cellulose Fibers Market Study 2016-2026, by Segment (Natural Cellulose Fibers, Man-Made Cellulose Fibers) , by Market (Apparel, Home Textile,) , by Company (Aditya Birla Group, Lenzing,) report by 99Strategy. Summary Cellulose fibers are fibers obtained from the bark, wood...
Figure Picture of Cellulose Fiber Gasket Figure Global Production Market Share of Cellulose Fiber Gasket by Types in 2015 Figure Global Consumption Volume Market Share of Cellulose Fiber Gasket by Applications in 2015 Figure Industry Chain Structure of Cellulose Fiber Gasket Figure Global Major Regions Cellulose Fiber Gasket Development Status in 2016 Figure 2010 to 2020F world GDP Figure Growth of world gross product and gross domestic product by country grouping, 2007-2017 Figure Growth of World Output 2013-2017 Figure Contribution to global growth, 2007-2017 Figure Regional contributions to world import growth Figure Price indices of selected groups of commodities, August 2013-September 2015 Figure Exchange rates of selected emerging-market currencies vis-a-vis the United States dollar, 1 September 2014-23 November 2015 Figure Real effective exchange-rate volatility, January 1996-September 2015 Figure Growth of labor productivity, before and after the crisis Figure Global Cellulose Fiber ...
A professional survey of "Global Cellulose Esters Market Report 2018" serves a in-depth assessment of Cellulose Esters industry containing empowering advances, vital patterns, growth drivers, institutionalised detailing, Cellulose Esters regulatory scenario, administrator definition investigation, Cellulose Esters launching, ultimate assistance, admiration chain, Cellulose Esters leading manufacturers profiles, and systems. Furthermore, the Cellulose Esters industry report provides projections for speculations from 2017 till 2026. SWOT investigation and PESTEL analysis is considered. Also, Forecast CAGR value X.X% further development in revenue XX.XX USD By 2026 is served.. The Cellulose Esters Market report figure out an detailed analysis of key Cellulose Esters market players by referring their company profile, supply/demand study , sales margin, Cellulose Esters gross margin and year-to-year revenue to have Cellulose Esters industry better share over the globe. Cellulose Esters market report ...
Growth prospects of the overall Cellulose Fibers industry have been presented in the report. However, to give an in-depth view to the readers, detailed geographical segmentation within the globe Cellulose Fibers market has been covered in this study. The key geographical regions along with their revenue forecasts are included in the report.. The competitive framework of the Cellulose Fibers market in terms of the Global Cellulose Fibers industry has been evaluated in the report. The top companies and their overall share and share with respect to the Global market have been included in the report. Furthermore, the factors on which the companies compete in the market have been evaluated in the report.. Ask for Sample Report: http://www.fiormarkets.com/report-detail/17151/request-sample. This report also presents product specification, manufacturing process, and product cost structure etc. Production is separated by regions, technology and applications. Analysis also covers upstream raw materials, ...
cellulose fiber manufacturer/supplier, China cellulose fiber manufacturer & factory list, find qualified Chinese cellulose fiber manufacturers, suppliers, factories, exporters & wholesalers quickly on Made-in-China.com.
Cellulose acetate phthalate (CAP), a pharmaceutical excipient used for enteric film coating of capsules and tablets, was shown to inhibit infection by the human immunodeficiency virus type 1 (HIV-1) and several herpesviruses. CAP formulations inactivated HIV-1, herpesvirus types 1 (HSV-1) and 2 (HSV-2) and the major nonviral sexually transmitted disease (STD) pathogens and were effective in animal models for vaginal infection by HSV-2 and simian immunodeficiency virus. Enzyme-linked immunoassays and flow cytometry were used to demonstrate CAP binding to HIV-1 and to define the binding site on the virus envelope. 1) CAP binds to HIV-1 virus particles and to the envelope glycoprotein gp120; 2) this leads to blockade of the gp120 V3 loop and other gp120 sites resulting in diminished reactivity with HIV-1 coreceptors CXCR4 and CCR5; 3) CAP binding to HIV-1 virions impairs their infectivity; 4) these findings apply to both HIV-1 IIIB, an X4 virus, and HIV-1 BaL, an R5 virus. These results provide support for
Protein-functionalized cellulose fibrils, having various amounts of covalently bonded proteins at their surface, were successfully extracted from the tunic of Pyura chilensis tunicates using successive alkaline extractions. Pure cellulose fibrils were also obtained by further bleaching and were used as reference material. Extraction yields of protein-functionalized cellulose fibrils were within the range of 62-76% by weight based on the dry initial tunic powder. Fourier-transform infrared and Raman spectroscopy confirmed the preservation of residual protein at the surface of cellulose fibrils, which was then quantified by X-ray photoelectron spectroscopy. The protein-functionalized cellulose fibrils were found to have relatively high crystallinity and their cellulose I crystalline structure was preserved upon applying alkaline treatments. The extracted cellulosic materials were found to be constituted of fibrils having a ribbon-like morphology with widths ranging from 30 nm up to similar to 400 ...
The validity of our approach of inedible cellulose-based resist material derived from woody biomass has been confirmed experimentally for the use of pure water in organic solvent-free water spin-coating and tetramethylammonium hydroxide(TMAH)-free water-developable techniques of eco-conscious electron beam (EB) and extreme-ultraviolet (EUV) lithography. The water developable, non-chemically amplified, high sensitive, and negative tone resist material in EB and EUV lithography was developed for environmental affair, safety, easiness of handling, and health of the working people. The inedible cellulose-based biomass resist material was developed by replacing the hydroxyl groups in the beta-linked disaccharides with EB and EUV sensitive groups. The 50-100 nm line and space width, and little footing profiles of cellulose-based biomass resist material on hardmask and layer were resolved at the doses of 10-30 μC/cm2. The eco-conscious lithography techniques was referred to as green EB and EUV ...
Cellulose is a renewable biomass material and natural polymer which is abundantly available on Earth, and includes agricultural wastes, forestry residues, and woody materials. The excellent and smart characteristics of cellulose materials, such as lightweight, biocompatibility, biodegradability, high mechanical strength/stiffness and low thermal expansibility, have made cellulose a high-potential material for various industry applications. Cellulose has recently been discovered as a smart material in the electroactive polymers family which carries the name of cellulose-based electroactive paper (EAPap). The shear piezoelectricity in cellulose polymers is able to induce large displacement output, low actuation voltage, and low power consumption in the application of biomimetic sensors/actuators and electromechanical system. The present study provides an overview of biomass pretreatment from various lignocellulosic cellulose (LC) resources and nanocellulose production via TEMPO-mediated oxidation reaction
A cellulose dope comprising an aqueous sodium hydroxide solution and cellulose dissolved in the solution, wherein the cellulose dope has a sodium hydroxide concentration (CNa) of from 6.5 to 11% by weight, a cellulose content (Cc) of from 5 to 10% by weight, a viscosity average degree of polymerization (DPc) of the cellulose of from 350 to 1,200 and a cellulose dissolution ratio (Sc) of 99.0% by weight or more, and wherein the zero-shear viscosity (η0) and the cellulose content (Cc) of the cellulose dope and the viscosity average degree of polymerization (DPc) of the cellulose in the cellulose dope satisfy the following formula (1): η0 =kCc m DPc p (1) wherein: η0 represents the zero-shear viscosity (mPa s) of the cellulose dope, Cc represents the cellulose content (% by weight) of the cellulose dope, DPc represents the viscosity average degree of polymerization of the cellulose in the cellulose dope, k=3.9 10−11, m is a number of from 5 to 7, and p is a number of from 3 to 4.
The versatile layer-by-layer (LbL) technique, for consecutive adsorption of polyelectrolytes and charged nanoparticles onto a substrate, was used to modify cellulose fibres and model surfaces for improved mechanical and wetting properties. In addition to being used to modify cellulose substrates, the LbL technique was also used to create cellulose surfaces suitable for high resolution adhesion measurements. LbL assembly of cellulose nanofibrils and polyethylenimine was used to prepare cellulose model surfaces on polydimethylsiloxane hemispheres which allowed for the first known Johnson-Kendall-Roberts (JKR) adhesion measurements between cellulose and smooth, well-defined model surfaces of cellulose, lignin and glucomannan. The work of adhesion on loading and the adhesion hysteresis were comparable for all three systems which suggest that adhesion between wood constituents is similar. The LbL technique was also used to decrease the hydrophilicity of paper, while improving the dry strength, by ...
A heterogeneous method for the acetylation of cotton cellulose was used for the preparation of high-molecular weight cellulose triacetate. The rates of acetylation and degradation of cellulose using different catalyst (zinc chloride), concentrations at different temperatures were studied. Viscosity-concentration studies for solutions of cellulose triacetate in the solvents chloroform, methylene chloride, tetrachloroethane, formic acid and m-cresol were carried out. Molecular weight determinations were carried out osmometrically (Mechro-lab Model) using chloroform as a solvent, for cellulose triacetate samples in the molecular weight range of 30,000-150,000. The Mark-Houwink viscosity-molecular weight relationship for cellulose triacetate in the above solvents and the Huggins viscosity-concentration relationship were investigated and the respective values of alpha, K and k1 constants were determined. The rate of degradation of cellulose triacetate in chloroform-acetic anhydride solutions for the ...
Cellulose powders from various sources were manufactured and characterized to investigate the influence of their crystallinity index, surface area, and pore volume on sorption phenomena and the relevant pharmaceutical functionality. The influence of the cellulose crystallinity index on moisture sorption was important at low and intermediate relative humidities. At high relative humidities, properties such as surface area and pore volume took precedence in governing the moisture sorption process.. The theory of physical adsorption of gases onto fractal surfaces was useful for understanding the distribution of water in cellulose and the inner nanoscale structure of cellulose particles. It was found that, as a consequence of swelling, moisture induces a fractal nanopore network in cellulose powders that have a low or intermediate degree of crystallinity. On the other hand, no swelling occurs in highly crystalline cellulose powders and moisture sorption is restricted to the walls of the open ...
Cellulose is the richest organic compound in the world mostly produced by plants. It is the most structural component in herbal cells and tissues. Cellulose is a natural long chain polymer that plays an important role in human food cycle indirectly. This polymer has multipurpose uses in many industries such as veterinary foods, wood and paper, fibers and clothes, cosmetic and pharmaceutical industries as excipient. Cellulose has semi-synthetic derivatives that are extensively used in pharmaceutical and cosmetic industries. Cellulose ethers and cellulose esters are two main groups of cellulose derivatives with different physicochemical and mechanical properties.. Access research report on Cellulose Derivatives Market analysis: http://www.grandviewresearch.com/industry-analysis/cellulose-derivatives-market. The global cellulose derivatives market is segmented on the basis of derivative type, derivative grades, end-use application, and region. On the basis of derivative type, the global market is ...
TY - JOUR. T1 - Preparation and characterization of cellulose derivatives by regioseleclive esterification of biodegradable cyclic esters. AU - Mayumi, Ayaka. AU - Kttaoka, Takuya. AU - Wariishi, Hiroyuki. PY - 2005/12/1. Y1 - 2005/12/1. N2 - New cellulose derivatives were prepared by the regioselective derivatization of cellulose with L-lactide (LA) and ε-caprolactone (CL) in a lithium chloride/N, N-dimethylacetamide solvent system, and investigated for their characteristics by spectroscopic analyses, calorimetry, solvent solubility/enzymatic degradability tests. Fourier transform Raman spectra of cellulose derivatives confirmed that the LA and CL molecules were covalently introduced into cellulose at the hydroxyl groups through the ring-opening esterification catalyzed by LiCl. The 13C nuclear magnetic resonance analysis indicated that the ring-opened LA and CL were regioselectively combined with cellulose C6-OH. Moreover, LA and CL portions were partially grafted on the cellulose backbone, ...
Improved cellulose semipermeable hollow fibers useful in detoxifying blood during hemodialysis or hemofiltration treatments. The cellulose fibers are fine, capillary fibers that are made by melt extrusion of certain cellulose ester polyol melt spin compositions into self-supporting gelled fibers. The cellulose ester gelled fibers are subsequently chemically converted into cellulose fibers by deacetylation, in aqueous alkali solution. The product fibers exhibit improved wet intrinsic tensile strength and higher water permeability characteristics than heretofore known cellulose fibers made from cellulose ester spin compositions. The invention includes the method of making the improved fibers and separatory cells such as hemodialyzers or hemofilters which contain the improved fibers in a gamma ray sterilized condition.
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This invention discloses a new technology related to cellulose fiber reinforced cement composite materials using cellulose fibers that are treated with inorganic and/or organic resins to make the fibers more hydrophobic, as well as other chemical treatments. This invention discloses four aspects of the technology: fiber treatment, formulations, methods and the final product. This technology advantageously provides fiber cement building materials with the desirable characteristics of reduced water absorption, reduced rate of water absorption, lower water migration, and lower water permeability. This invention also impart the final products improved freeze-thaw resistance, reduced efflorescence, and improved rot and UV resistances, compared to conventional fiber cement products. These improved attributes are gained without loss in dimensional stability, strength, strain or toughness. In some cases the physical and mechanical properties are improved. This
The elasticity of elastic, absorbent structures, e.g., diapers, is improved without a significant compromise of the absorbency of the structure by the use of bicomponent and/or biconstituent elastic fibers. The absorbent structures typically comprise a staple fiber, e.g., cellulose fibers, and a bicomponent and/or a biconstituent elastic. The bicomponent fiber typically has a core/sheath construction. The core comprises an elastic thermoplastic elastomer, preferably a TPU, and the sheath comprises a homogeneously branched polyolefin, preferably a homogeneously branched substantially linear ethylene polymer. In various embodiments of the invention, the elasticity is improved by preparation techniques that enhance the ratio of elastic fiber:cellulose fiber bonding versus cellulose fiber:cellulose fiber bonding. These techniques include wet and dry high intensity agitation of the elastic fibers prior to mixing with the cellulose fibers, deactivation of the hydrogen bonding between cellulose fibers, and
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International Paper Global Cellulose Fibers has a multi-mill network producing cellulose fibers and fluff pulp used in consumer goods that people depend on every day.
[115 Pages Report] Check for Discount on Global Cellulose Fibers Market Research Report 2017 report by QYResearch Group. In this report, the global Cellulose Fibers market is valued...
Cellulose is a main component of plant cell walls. Tools to analyze cellulose mainly rely on analytical chemistry, which yields information about cellulose amounts and structure, but cannot be applied to intact tissues. Moreover, these methods measure total cellulose and cannot be used to assay cellulose synthesis per se. Live cell imaging of the catalytic subunits of the cellulose synthesis complex (CSC) conjugated to fluorescent proteins is an important tool to understand the dynamics of the cellulose biosynthesis process (Paredez et al., 2006). This method can be used in various genetic backgrounds (Sorek et al., 2014) or with different chemical inhibitors (Brabham and Debolt, 2012). Here we describe in detail the procedure to visualize the movement of CSCs at the plasma membrane. As the movement of CSCs is likely caused by glucan synthesis and extrusion into the cell wall, live cell analysis of CSC velocity provides a method to directly measure cellulose synthesis in vivo.
Global microcrystalline cellulose market is expected to grow at a significant CAGR in the upcoming period as the scope and its applications are rising enormously across the globe. Microcrystalline cellulose (MCC) is a term used for refined wood pulp and is used as a bulking agent, a texturizer, an extender, an anti-caking agent, an emulsifier, and a fat substitute in food production. It is exclusively used in vitamin tablets or supplements and in plaque assays as a substitute to carboxymethyl cellulose. The factors that are playing a major role in the growth of microcrystalline cellulose (MCC) industry are the developing processed food industries across the globe, the rising pharmaceutical companies, and the acceptance of microcrystalline cellulose as a pharmaceutical excipient. However, the presence of alternatives for specific pharma and food & beverage applications may restrain the overall market in the years to come. Microcrystalline cellulose market is segmented based on source type, ...
Abstract : Cellulose being an excellent biopolymer has cemented its place firmly in many industries as a coating material, textile,composites, and biomaterial applications. In the present study, we have investigated the effect of biofield treatment onphysicochemical properties of cellulose and cellulose acetate. The cellulose and cellulose acetate were exposed tobiofield and further the chemical and thermal properties were investigated. X-ray diffraction study asserted that thebiofield treatment did affect the crystalline nature of cellulose. The percentage of crystallite size was found increasedsignificantly in treated cellulose by 159.83%, as compared to control sample. This showed that biofield treatment waschanging the crystalline nature of treated cellulose. However treated cellulose acetate showed a reduction in crystallitesize (-17.38%) as compared to control sample. Differential Scanning Calorimetry (DSC) of treated cellulose showed noimprovement in melting temperature as compared to ...
Process Parameters for Fermentation in a Rotary Disc Reactor for Optimum Microbial Cellulose Production using Response Surface Methodology
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Cellulose is the most abundant natural product in the biosphere with a variety of functional roles. Despite this abundance, the capacity to synthesize cellulose is restricted to relatively few phyla. Among prokaryotes, soil bacteria of the family Rhizobiaceae (Agrobacterium tumefaciens and Rhizobium spp) use cellulose in anchoring to host plant tissues during infection (Matthysse 1983; Smith et al., 1992). In Acetobacter xilinum, cellulose fibrils maintain bacterial cells in an aerobic environment in liquid and protect the cells from UV radiation (Williams and Cannon, 1989). Within the plant kingdom, cellulose plays a key role in structural support and the oriented deposition of cellulose microfibrils is crucial to patterning through anisotropic growth during development (Smith and Oppenheimer, 2005). The social amoeba, Dictyostelium, requires cellulose for stalk and spore formation (Blanton et al., 2000), and cellulose synthesis is also present in some fungi, although its function remains ...
The in-depth understanding of the enzymatic hydrolysis of cellulose with heterogeneous morphology (that is, crystalline versus amorphous) may help develop better cellulase cocktail mixtures and biomass pretreatment, wherein cost-effective release of soluble sugars from solid cellulosic materials remains the largest obstacle to the economic viability of second generation biorefineries. In addition to the previously developed non-hydrolytic fusion protein, GC3, containing a green fluorescent protein (GFP) and a family 3 carbohydrate-binding module (CBM3) that can bind both surfaces of amorphous and crystalline celluloses, we developed a new protein probe, CC17, which contained a mono-cherry fluorescent protein (CFP) and a family 17 carbohydrate-binding module (CBM17) that can bind only amorphous cellulose surfaces. Via these two probes, the surface accessibilities of amorphous and crystalline celluloses were determined quantitatively. Our results for the enzymatic hydrolysis of microcrystalline cellulose
TY - JOUR. T1 - Injection molding of thermoplastic cellulose esters and their compatibility with poly(lactic acid) and polyethylene. AU - Willberg-Keyriläinen, Pia. AU - Orelma, Hannes. AU - Ropponen, Jarmo. PY - 2018/11/23. Y1 - 2018/11/23. N2 - Interest in biobased polymers from renewable resources has grown in recent years due to environmental concerns, but they still have a minimal fraction of the total global market. In this study, the injection molding of thermoplastic cellulose octanate (cellulose C8) and cellulose palmitate (cellulose C16) were studied. The mechanical properties of injection-molded test specimens were analyzed by using tensile testing, and the internal structure of injection-molded objects was studied by using a field emission scanning electron microscopy (FE-SEM). We showed that thermoplastic cellulose C8 and cellulose C16 were completely processable without the addition of a plasticizer, which is very unusual in the case of cellulose esters. The compatibility of ...
Conference in "Cellulosic material Properties and industrial potential" - Final meeting in COST FP1205. This was hosted by Royal Institute of Technology KTH. The aim of the conference was to provide support on new product area development around the theme Cellulosic materials - processing, properties and promising applications related to COST FP1205 and to spread the knowledge to the wider scientific community on the current and upcoming commercial processes. Over 80 participants took part of the presentations, posters, and discussions. This last day of the meeting a round tour of the KTH campus was given in parallel with the final Management Committee meeting.. ...
Cellulosic materials are used in a wide range of areas of application, and one of these is paperboard for packaging solutions. Paper or paperboard as a packaging material has benefits like low density, low costs, high stiffness, good printability, and paper is environmentally friendly. Compared to other packaging materials, such as plastics, paper has some weaknesses By improving some of its weaknesses, paper as a packaging material, can become more competitive on the market, and knowing how to utilize this resource in a more effective and sustainable way will become increasingly important in the future. One way to decrease the amount of fibers needed in paper and paperboard is by improving the strength properties of cellulose fibers. Greater fiber strength can be achieved by, for example crosslinking the fibers, and crosslinking can be achieved with only a small amount of chemicals. By using electromagnetic radiation, like ultraviolet (UV) radiation, the fibers can be crosslinked with the aid of a UV
The interaction between cellulase enzymes and their substrates is of central importance to several technological and scientific challenges. Here we report that the binding of cellulose binding modules (CBM) from Trichoderma reesei cellulases Cel6A and Cel7A show a major difference in how they interact with substrates originating from wood compared to bacterial cellulose. We found that the CBM from TrCel7A recognizes the two substrates differently and as a consequence shows an unexpected way of binding. We show that the substrate has a large impact on the exchange rate of the studied CBM, and moreover, CBM-TrCel7A seems to have an additional mode of binding on wood derived cellulose but not on cellulose originating from bacterial source. This mode is not seen in double CBM (DCBM) constructs comprising both CBM-TrCel7A and CBM-TrCel6A. The linker length of DCBMs affects the binding properties, and slows down the exchange rates of the proteins and thus, can be used to analyze the differences ...
Background The in-depth understanding of the enzymatic hydrolysis of cellulose with heterogeneous morphology (that is, crystalline versus amorphous) may help develop better cellulase cocktail mixtures and biomass pretreatment, wherein cost-effective release of soluble sugars from solid cellulosic materials remains the largest obstacle to the economic viability of second generation biorefineries. Results In addition to the previously developed non-hydrolytic fusion protein, GC3, containing a green fluorescent protein (GFP) and a family 3 carbohydrate-binding module (CBM3) that can bind both surfaces of amorphous and crystalline celluloses, we developed a new protein probe, CC17, which contained a mono-cherry fluorescent protein (CFP) and a family 17 carbohydrate-binding module (CBM17) that can bind only amorphous cellulose surfaces. Via these two probes, the surface accessibilities of amorphous and crystalline celluloses were determined quantitatively. Our results for the enzymatic hydrolysis of ...
The biodegradation behavior of 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized cellulose fibers (TOCs) suspended in water and TEMPO-oxidized cellulose nanofibrils (TOCNs) dispersed in...
Hydrolysis is widely acknowledged as the rate-limiting step in anaerobic digestion of solid cellulose to biogas, and pretreatment is generally considered to facilitate the process. However, few studies have investigated how such pretreatment may affect the rest of this complex process. The present study compared the solubilization rate in anaerobic digestion of cotton linter (high crystalline cellulose), with that of regenerated cellulose (amorphous cellulose), using pretreatment with NMMO. Batch digestions were performed, with the initial cellulose concentrations ranging between 5 and 40 g/l, and during 30 days of incubation, biogas and VFAs production as well as pH and COD changes were measured. The lag time before digestion started was longer for the high crystalline cellulose than for the amorphous one. The maximum solubilization ratesof treated cellulose were 842 and 517 mg sCOD/g cCOD/day at the initial cellulose concentration of 5 and 30 g/l respectively, while the solubilization rate of
Progress of cellulose-based Biomedical functional compositescellulose-based Functional composites exhibit the functional characteristics, such as light, electric, magnetic func-tionsand catalytic properties, which have been widely applied in pulping and papermaking, fine chemical, tissue en-gineering, BIOmedical and other fields.cellulose-based biomedical composites are typical cellulose materials, com-bining the advantages of both biomass and biomaTerials, which have potential applications in bone repair and re-placement, tissue engineering, drug delivery, Gene CarrieR, protein adsorption, and other fields.In this review, we in-troduced three synthetic methods to composites including hydrothermal (Solvothermal) method, MicrowAve method and ultrasonic method, discussed the advantages and disadvantages of these three kinds of preparation,reviewed the progress of cellulose-based materials, and systematically summarized cellulose-based biomedical compOsites such as Cellulose/hydroxyapatite, ...
Carpita said this let researchers see that the siRNAs - among other things - regulate and shut down primary cell wall development to begin secondary wall growth.. "These secondary stages result in characteristics such as tough rinds of corn stalks, vascular elements to conduct water and fibers for strength," he said. The researchers said that delaying or preventing the shutdown of both primary and secondary cellulose production might enhance total plant biomass.. "Most biofuel researchers believe that cellulose utilization offers the best path to sustainable ethanol production," Scofield said. "Our work uncovered a previously unknown mechanism that suggests a way to increase the amount of cellulose produced in plants.". Other members of the research team were Bryan Penning and Sarah Kessans of Purdue and Amanda Brandt of the USDA/Ag Research Service, Crop Production and Pest Control Research Unit located at Purdue.. The research was funded by a U.S. Department of Energy, Energy Biosciences ...
The successful synthesis of novel cholesteric hydroxypropyl cellulose (HPC) ester derivatives with pitch heights in the visible range and with functional thioether groups is reported here. The new methylthiopropionated HPC (HPC-MTP) was synthesized by the esterification of hydroxypropyl cellulose with 3-methylthiopropionyl chloride (MTP). Chain degradation and cross-linking of cellulose chains during esterification were avoided and complete esterification of all OH groups was achieved by the use of N,N-dimethylacetamide (DMAc) as the solvent. The structure of HPC-MTP was analyzed by NMR- and IR-spectroscopy and SEC. The physical properties of this new material were measured by TGA, DSC, wide angle X-ray scattering, polarization microscopy and UV/Vis spectroscopy. HPC-MTP products were found to be thermotropic liquid crystalline and formed cholesteric and nematic phases. The formation of lyotropic phases was observed with triglyme as the solvent.. ...
Cellulose is one of the most common polysaccharides in the world and can be found almost in every plant. The scientific team of the Laboratory of Cellulose has more than 30 year experience and high competence in obtaining cellulose fibres from different types of biomass.. In the Laboratory, there is a reactor for Kraft cooking as well as wide spectra of equipment for testing of fibres (e.g. dimensions and composition). Various modifications (chemical - e.g. bleaching; mechanical - e.g. refining, milling) of fibres can be done during the implementation of scientific and industrial projects in order to improve the characteristics of fibres or to produce products of further processing, such as microcrystalline cellulose (MCC) or nanocellulose (NC). A patent for obtaining of MCC has been developed in the Laboratory of Cellulose; the process includes combining the thermocatalytic treatment of cellulose and ball milling.. Researchers have been always following the main trends in cellulose science, and ...
Cellulose is one of the most common polysaccharides in the world and can be found almost in every plant. The scientific team of the Laboratory of Cellulose has more than 30 year experience and high competence in obtaining cellulose fibres from different types of biomass.. In the Laboratory, there is a reactor for Kraft cooking as well as wide spectra of equipment for testing of fibres (e.g. dimensions and composition). Various modifications (chemical - e.g. bleaching; mechanical - e.g. refining, milling) of fibres can be done during the implementation of scientific and industrial projects in order to improve the characteristics of fibres or to produce products of further processing, such as microcrystalline cellulose (MCC) or nanocellulose (NC). A patent for obtaining of MCC has been developed in the Laboratory of Cellulose; the process includes combining the thermocatalytic treatment of cellulose and ball milling.. Researchers have been always following the main trends in cellulose science, and ...
Stejskal, J., Trchová, M. and Sapurina, I. (2005), Flame-retardant effect of polyaniline coating deposited on cellulose fibers. J. Appl. Polym. Sci., 98: 2347-2354. doi: 10.1002/app.22144 ...
As a researcher in Uppsala has shown, another advantage of cellulose-based batteries is that they can be quickly recharged. Their one disadvantage is that they are less able to retain their energy compared to conventional metal-based batteries. The technology needs to be developed further to be a real alternative. In the coming years, Sony plans to develop its bio-based batteries for commercial usage. But the application will initially be limited to toys and other products that have limited energy needs. Looking down the road, Sony hopes its bio-batteries could be used in laptops and cell phones, for example.. Hopefully batteries based on cellulose and other biological materials will become real alternatives to todays metal-based batteries.. This article was published in July 2012. ...
Reactive dyes is cellulose fiber with the development of the dyes and the use of a key, outstanding is the following four aspects:
Hydrolysis of cellulose to glucose is the most critical step in bioconversion of lignocellulosic biomass to fuels and chemicals. Cellulases and homogenous acids are widely used for cellulose hydrolysis. However, cellulases can only be used at moderate conditions and need longer time to achieve satisfactory cellulose hydrolysis. Homogenous acids can tolerate higher temperature, but they have limitations and issues such as equipment corrosion, recycling and wastewater treatment. To address these issues, heterogeneous solid acids have recently drawn a lot of attention for hydrolyzing cellulose. Traditional solid acids such as sulfonated carbon and resins, however, are not as effective as homogenous acids and cellulases in hydrolyzing cellulose because they have poor access/affinity to cellulose. In this study, a series of porous polymeric solid acids were synthesized for cellulose hydrolysis. These cellulase-mimetic solid acids have hydroxyl, halide, or boronic acid as cellulose-binding group in ...
TY - JOUR. T1 - The antimicrobial reagent role on the degradation of model cellulose film. AU - Jausovec, D.. AU - Angelescu, Daniel. AU - Voncina, B.. AU - Nylander, Tommy. AU - Lindman, Björn. PY - 2008. Y1 - 2008. N2 - The effect of the antimicrobial agent TMPAC (3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride) on the cellulase activity oil model cellulose substrate was investigated by in situ-null ellipsometry. The cellulases used were extracted from Trichoderma virlde and Aspergillus niger, and the model cellulose film was prepared by spin-coating silicon oxide wafers with cellulose solubilized in N-methylmorpholine-N-oxide/dimethyl sulfoxide solution. Upon enzyme addition to the previously equilibrated cellulose film, the initial enzyme adsorption oil the substrate was followed by an overall decrease in film mass owing to enzymatic digestion of the cellulose. The loss of cellulose film mass was associated with a non-monotonously behavior of the cellulose film thickness. The ...
A novel approach in the production of protein based films and composites were performed, using the bovine milk protein casein and regenerated cellulose fibres (lyocell). The films were prepared by first dissolving the casein protein in an aqueous alkaline solution in the presence of glycerol as a plasticizer. Further the composite films were prepared by the addition of fibres on aqueous alkaline solution with casein. The casein films and composites were thereafter prepared by casting the solution mixture on Teflon coated glass plate and drying for 48 hr. The effects of glycerol content and lyocell fibre reinforcements on the mechanical, thermal and physiological properties of the casein films were characterized. The results revealed that the increase in the addition of glycerol content decreases the tensile strength, youngs modulus, thermal stability of the film and increases the elongation percentage. Tensile property and thermal stability of the films was improved by the increase in the ...
Over the past decades, nanoparticles (NP) have received a huge and constantly increasing interest in fundamental and applied research. In addition to