Studies on Liquid Crystalline Behavior of Chitosan

Abstract

Abstract: The lyotropic liquid crystalline behavior of a natural macromolecule-chitosan was studied using polarized microscopy,average refractive index method and FTIR.The critical concentrations of chitosan in solvents of dichloroacetic acid,formic acid,acrylic acid and 36% acetic acid were all 8% (percentage by volume) or 4%～6%(percentage by weight).These experimental values are consistent with the calculated value deduced according to Flory theory.These low critical concentration values also imply that the chain rigidity of chitosan is larger than that of cellulosic chain.

Key words: Chitosan, Lyotropic liquid crystal, Critical concentration, Chain rigidity

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DONG Yan-Ming, ZHANG Jing. Studies on Liquid Crystalline Behavior of Chitosan[J]. Chem. J. Chinese Universities, 1996, 17(6): 973.

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Studies on Liquid Crystalline Behavior of Chitosan

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