不同温度下桑蚕丝的力学性能  

Mechanical Properties of Bombyx mori Silk at Different Temperatures

作　　者：杨湧 陈新[1] 周平[1] 姚文华[2] 邵正中[1] 

机构地区：[1]复旦大学高分子科学系聚合物分子工程教育部重点实验室 [2]复旦大学测试中心,上海200433

出　　处：《高等学校化学学报》2001年第9期1592-1596,共5页Chemical Journal of Chinese Universities

基　　金：荷兰 DSM公司;国家自然科学基金 (批准号 :2 99740 0 5 );上海青年科技启明星计划 (批准号 :98QE14 0 33)资助

摘　　要：在严格控温条件下 ,利用动态机械热分析仪 ( DMTA)对大量未脱胶和脱胶桑蚕丝的单丝样品在不同温度下拉伸 ,同时用 SEM,TEM以及拉曼光谱观察蚕丝的断面形貌和内部结构的变化 .结果表明 ,在实验温度范围内 ,蚕丝初始模量和断裂强度皆随温度的升高而降低 ;拉伸过程会导致丝素蛋白形成更多的β-结构 .同时 ,丝胶表现出较差的力学性能 。The mechanical properties of both raw and degummed Bombyx mori silk fibers were carried out by Dynamic Mechanical Thermal Analyzer(DMTA) at different temperatures under precise temperature control. Both stress strain curve and hysteresis loop of single filament were tested. Moreover, the rupture section morphology and inner structure of raw and degummed Bombyx mori silk were examined by SEM, TEM and Raman spectroscopy. The results showed that the initial modulus as well as rupture strength of Bombyx mori silk decreased with the increase of temperature. It was also found that the stretching process induced more β structure in silk fiber. In addition, sericin was found to perform a worse mechanical property than fibroin.

关 键 词：桑蚕丝 温度 力学性能 结构 丝胶蛋白 动态机械热分析仪 丝胶蛋白纤维 

分 类 号：TS102.33[轻工技术与工程—纺织工程] Q51[轻工技术与工程—纺织科学与工程]