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中文摘要：
在制备高浓度高分子量蚕丝素蛋白水溶液的基础上，采用湿法纺丝技术，在一定条件下纺制出力学性能优于天然蚕（茧）丝的再生蚕丝纤维，其断裂强度及断裂伸长率分别达到0．5GPa和20％。扫描电镜观察结果显示：初生纤维具有典型的“皮芯”结构，而纤维内部则为疏松多孔的网状或蜂窝状结构；经过一定的后拉伸处理后，纤维的表面变得光滑，且内部结构也趋于致密。固体^13C核磁共振及拉曼光谱分析结果表明，后拉伸及热湿处理均有利于提高纤维内部β-折叠结构的含量，分子链的规整度和取向性也随之改善，从而使再生蚕丝纤维的力学性能得到进一步提高。
英文摘要：
Regenerated silk fibroin fibers with remarkable mechanical properties were successfully prepared via wet spinning technique, based on the high concentration and high molecular weight silk fibroin aqueous so-lution as spinning dope. With the observation of SEM, it could be found that the cellular structure may exist in the core of as-spun fibers. The regenerated silk fibers exhibited a smooth surface and dense structure after the post-drawn process. The NMR and Raman spectra results reveal that the β-sheet content increased with the in-crease of drawn ratios. It was also found that the steam-annealing can further improve the orientation of the macromolecular chains in the fibers. After the post treatment （both post-drawn and steam annealing）, the breaking strength better than that o and the elongation at break can reach 0. 5 GPa and 22%, separately, which is close or even f natural silk （cocoon） fibers.
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