论文部分内容阅读
报道了甲壳素有溶致液晶性．对四种不同分子量的甲壳素的研究结果表明，分子量增大，临界浓度显著降低，胆甾相平均螺距减少，但液晶有序微区平均尺寸却增加．甲壳素分子量为２８４×１０６、１４７×１０６、９４×１０５和５３×１０５时，在二氯乙酸中的临界浓度（Ｗ／Ｗ）分别为０００５、００１５、００３５和００５０．根据理论分析，甲壳素可视为刚性链，与多肽相似．甲壳素的指纹状织构不同于其他溶致液晶体系，在各种分子量甲壳素的两相共存浓度区内，液晶有序存在于内含指纹的不规则微区内，而不是滴状微区内．
Chitin has been reported to have lyotropic liquid crystallinity. The results of four different molecular weight chitin studies show that the molecular weight increases, the critical concentration decreases significantly, and the average pitch of the cholesteric phase decreases, but the average order size of the ordered domains increases. The critical concentrations (W / W) of chitin in Dichloroacetic acid were 0550 and 050, respectively, when the chitin molecular weights were 284 × 106, 147 × 106, 94 × 105 and 53 × 105 015,0 035 and 0 050. According to theoretical analysis, chitin can be regarded as a rigid chain, similar to the polypeptide. Chitin fingerprint structure is different from other lyotropic liquid crystal system, in a variety of molecular weight chitin two-phase coexistence concentration region, the liquid crystal orderly exist in the fingerprint-containing irregular micro-area, rather than drop-shaped micro-area Inside.