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Influence of Molecular Weight of Chitosanon Liquid Crystalline Behavior

WANG Jian\|Wei, DONG Yan\|Ming\+*, LIU Huang\|Nan, YUAN Qing, MEI Xue\|Feng (Department of Materials Science, Xiamen University, Xiamen, 361005) \=\=  
The lyotropic cholesteic liquid crystalline phase was observed in the dichloroacetic acid solutions of the three chitosans with different molecular weights from 2.3410\+6 to \{0.4410\+6\} but with the same degree of deacetylation. The critical concentration of chitosan decreased when its molecular weight increased and was higher than chitin with the same degree of polymerization. The value of average pitch obtained by both small angle light scattering and polarized microscopy decreased when the molecular weight of chitosan increased.
【Fund】: 中国科学院纤维素化学研究开放实验室资助
【CateGory Index】: O631
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