N-烷基壳聚糖的羽毛状结晶  

Feather-like Crystals of N-Alkyl Chitosan

作　　者：董炎明[1] 赵雅青[1] 王惠武[1] 阮永红[1] 

机构地区：[1]厦门大学材料科学与工程系,福建厦门361005

出　　处：《吉首大学学报（自然科学版）》2003年第2期20-22,共3页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(29974023)

摘　　要：将N-甲基壳聚糖或N-乙基壳聚糖的甲酸溶液在高真空中浇铸成膜.然后将浇铸膜在25℃和65%相对湿度的环境中结晶化得到羽毛状结晶.这种羽毛状结晶不同于低真空处理的浇铸膜内生长的球晶.除了形态不同外,双折射符号也完全不同,前者是负的,而后者是正的.羽毛状结晶应是树枝状结晶的一种,但前者的晶带是弯曲的,而后者的晶带基本上是直的.The N-methyl chitosan or N-ethyl chitosan was cast into films at high vacuum.Then the cast film crystallized at 25 ℃ and 65% relative humidity and the feather-like crystals appeared.The feather-like crystals were different with spherulites,which grew in the films cast at low vacuum.In addition to morphology,the birefrigence nature of feather-like crystals and spherulites was completely different.The former was negative,but the latter was positive.The feather-like crystals were believed to belong to one kind of dendritic crystals.

关 键 词：N-烷基壳聚糖 羽毛状结晶 甲酸溶液 相对湿度 树枝状结晶 甲壳素 浇铸膜 

分 类 号：O636.1[理学—高分子化学] O552.6[理学—化学]