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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
