Studies on the post-treatment of the dry-spun fibers from regenerated silk fibroin solution: Post-treatment agent and method
- 作者：Wei Wei ; Yaopeng Zhang ; zyp@dhu.edu.cn ; Yingmei Zhao ; Huili Shao ; Xuechao Hu
- 关键词：A. Natural materials ; B. Fibers and filaments ; E. Mechanical
- 刊名：Materials and Design
- 出版年：2012
- 期刊代码：56_02613069
- 类别：ms
- 出版时间：April, 2012
- 卷：36
- 期：Complete
- 页码：816-822
- 文件大小：524 K
摘要
By mimicking the spinning process of silkworm, regenerated silk fibroin (RSF) biofibers were dry-spun from RSF aqueous solutions and then post-treated. The effects of post-treatment agents on the conformation, surface morphology, orientation and mechanical properties of the fibers were studied. Compared to inorganic salt system, alcohol/water system obviously induced the fibroin conformation transition from random coil/伪-helix to 尾-sheet. In addition, the post-drawing process induced the orientation of the 尾-sheet crystallites, which contributed to the improved breaking stress of the fiber. When the fiber was drawn two times in 80 vol.%ethanol aqueous solution, and then immersed in the solution for 1 h, the breaking stress and the elongation at break of the fiber were increased to 199 MPa and 55%, respectively.