Chitosan fibers

K. Watanabe and S. Kyo, Pervaporation Performance of Hollow-fiber Chitosan-Polyacrylonitrile Composite Membrane in Dehydration of Ethanol, J. Chem. Eng. Jpn 25, 17 (1992). 

Others Enzyme immobilization Encapsulation of nutraceuticals Chromatography Analytical reagent Synthetic fiber Chitosan-coated paper Manufacturing material for fiber Film and sponges... 

Lu X, Leng Y, Zhang Q (2008) Electrochemical deposition of octacalcium phosphate micro-fiber/chitosan composite coatings on titanium substrates. Surf Coat Technol 202(13) 3142... 

Watanahe, K. and Kyo, S. 1992. Pervaporation performance of hoUow-fiber chitosan-polyacrylonitrile composite membrane in dehydration of ethanol. J. Chem. Eng. Jpn. 25 17-23. 

Lee et al. reported on the effects of the concentration of cross-linking agent, epichlorohydrin (ECH), in the spurning dope on the mechanical properties of chitosan fiber. Chitosan fibers are prepared with ECH concentrations from 0.5 to 25.0 x 10 M. The wet tenacity increases somewhat as the concentration of ECH increases in the spinning dope. However, the... 

Gallstedt M, Hedenqvist MS (2006) Packaging-related mechanical and barrier properties of pulp-fiber-chitosan sheets. Carbohydr Polym 63 46-53... 

YiminQinis Professor of Chemical Engineering at Jiaxing College, China. He specializes in research and development of alginate fibers, chitosan fibers, functional wound dressings, and marine biomedical materials, and has published more than 100 research papers and obtained seven US patents in this area. 

In addition to PEO, PVA is commonly used to facilitate electrospinning of other polymers. Ohkawa et al. [155] reported electrospinning of Chitosan/PVA together with pure chitosan fibers. Chitosan and PVA were dissolved in neat formic acid and distilled water, respectively, then blend solutions were electrospun, resulting in fibers with diameters of... 

In spite of the alteration due to deacetylation, chitosan from crab tendon possesses a crystal structure showing an orthorhombic unit cell with dimensions a = 0.828, b = 0.862 and c = 1.043 nm (fiber axis). The unit cell comprises four glucosamine units two chains pass through the unit cell with an antiparallel packing arrangement. The main hydrogen bonds are 03 05 (intramolecular) and N2 06 (intermolecular) [82]. This material has also found medical uses (below). 

Chitosan samples with degrees of deacetylation of 65,73,85, and 92% were almost completely adsorbed onto the surfaces of cellulosic fibers, especially onto the surfaces of fines in a variety of cellulosic systems used in industrial operations. Adsorption increased as the degree of deacetylation of chitosan increased. The aggregation of the fine cellulosic particles was maximum at a dosage of about 10 mg/kg. The interactions between chitosan and the cellulosic substrates were dominated by a bridging mechanism at about pH 7 [32]. 

The subject of fiber production from chitin and chitosan has been reviewed considering the interest in the exploitation of chitin as a textile material [246-251]. The production of fibers, however, is a challenging and difficult task. 

Nontoxic and noncorrosive solvent systems can be used when chitosan is considered instead of chitin for the manufacture of fibers. Improvements of the fiber quality rely mostly on technical shrewdness for instance the use of potassium hydrogen phthalate at pH 4-5 imparted better mechanical properties [255]. 

A novel fiber-reactive chitosan derivative was synthesized in two steps from a chitosan of low molecular weight and low degree of acetylation. First, a water-soluble chitosan derivative, N-[(2-hydroxy-3-trimethylammonium)-... 

Cotton-like chitosan obtained by spinning chitosan acetate salt into a coagulating bath of ethylene glycol, ice and NaOH fibers washed with water and methanol. 

Gallaher, D.D., Gallaher, C.M., Mahrt, G.J., Carr, T.P., Hollingshead, C.H., Hesslink, R., Jr., and Wise, J. 2002. A glucomannan and chitosan fiber supplement decreases plasma cholesterol and increases cholesterol excretion in overweight normocholesterolemic humans. J. Am. Coll Nutr. 21, 428-433. 

Chitosan is a type of fiber, a nutrient that is necessary for healthy digestion. It s different from common fiber that a person gets in his or her diet, such as that found in vegetables and whole grains. In theory, chitosan binds with fat, and that chitosan-bound fat becomes a kind of "grease ball" that is too large for the body to absorb. Instead, as with orlistat-bound fat, it leaves the body as waste matter. At least, this is what the makers of Chitosol, Fat Zapper, and other chitosan-based products want you to believe. 

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