高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (9): 1592.

• 研究论文 • 上一篇    下一篇

不同温度下桑蚕丝的力学性能

杨湧1, 陈新1, 周平1, 姚文华2, 邵正中1   

  1. 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
  • 收稿日期:2000-09-18 出版日期:2001-09-24 发布日期:2001-09-24
  • 通讯作者: 邵正中(1964年出生),男,博士,教授,博士生导师,主要从事生物大分子研究.
  • 基金资助:

    荷兰DSM公司、国家自然科学基金(批准号:29974005);上海青年科技启明星计划(批准号:98QE14033)资助

Mechanical Properties of Bombyx mori Silk at Different Temperatures

YANG Yong1, CHEN Xin1, ZHOU Ping1, YAO Wen-Hua2, SHAO Zheng-Zhong1   

  1. 1. Material School, Huazhong University of Science and Technology, Wuhan 430074, China;
    2. Guizhou University of Technology, Guiyang 550003, China
  • Received:2000-09-18 Online:2001-09-24 Published:2001-09-24

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,其主要作用是以涂层的形式对丝素蛋白纤维进行保护.

关键词: 桑蚕丝, 丝胶, 丝素, 温度, 力学性能

Abstract: 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, TEMand 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.

Key words: Bombyx mori silk, Sericin, Fibroin, Temperature, Mechanical property

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