鱿鱼顶骨β-壳聚糖的液晶性  

Liquid Crystalline Behaviors of β-Chitosan From Squid Pen

作　　者：董炎明[1] 阮永红[1] 吴玉松[1] 王勉[1] 许聪义[1] 丘蔚碧[1] 

机构地区：[1]厦门大学材料科学与工程系

出　　处：《厦门大学学报（自然科学版）》2001年第6期1238-1243,共6页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金 (2 9974 0 2 3);福建省自然科学基金 (Z9910 0 0 6)资助项目

摘　　要：用广角 X光衍射、扫描电子显微镜和偏光显微镜研究由鱿鱼顶骨制备的β-壳聚糖与由蟹壳制备的 α-壳聚糖的结晶结构和液晶行为 .两种壳聚糖在二氯乙酸中形成液晶的临界浓度基本相同 ,说明具有相同的链刚性 .β-壳聚糖临界浓度实验值 (9wt% )与理论预计值 (10 wt% )相符 .另一方面 ,β-壳聚糖比α-壳聚糖在二氯乙酸中能形成更为有序的取向态液晶织构 .解释为β-壳聚糖的结晶度和微纤化程度均比 α-壳聚糖高 ,在形成液晶溶液时发生“结构滞后”现象 .The crystalline structure and liquid crystalline behavior of β-chitosan prepared from squid pen and α-chitosan prepared from crab cell were studied with wide angle X-ray diffractionscanning electron microscopy and polarized optical microscopy. Both chitosans had basically the same critical concentration forming mesogenic phase in dichloroacetic acid with α-chitosan. The experimental value (9wt%) agreed with the theoretic value (10 wt%). But 15% β-chitosan/dichloroacetic acid solution formed more order oriented liquid crystalline texture than 15% α-chitosan/dichloroacetic acid solution, because of the 'structure hysteresis' of β-chitosan which had higher crystallinity and fibrillation than α-chitosan.

关 键 词：β-甲壳素 β-壳聚糖 溶致液晶 鱿鱼顶骨 结晶结构 液晶行为 临界浓度 

分 类 号：O636.1[理学—高分子化学]