Dry spinning of regenerated silk fibroin aqueous solution
A self-made capillary spinning equipment was applied to spin regenerated silk fibroin (RSF) fibers from concentrated RSF aqueous solutions in air as silkworm. Without using nitrogen for pressure driving, the equipment has many advantages, such as simple structure, less requirement of spinning dope, and easy replacement of capillary. Compared to conventional dry spinning equipment, the new one expanded the spinning window for various RSF aqueous solutions. The effects of molecular weight, pH, metal ions, concentration and spinning parameters on the spinnability of the spinning dope and the mechanical properties of the obtained fibers were investigated. As a result, spinning dopes with a pH from 5.2 to 6.9 have good spinnability, especially for the dope with a pH of 6.0 and a Ca2+concentration of 0.3 M. The RSF concentration of this dope is ranging from 44% to 48% in dry spinning process. Under optimized conditions of our dry spinning experiment (length-diameter ratio of spinning capillary, 133; take-up speed, 30 mm/s), the obtained fiber has a breaking strength of 45.8 MPa.
WEI Wei ZHANG Yaopeng ZHAO Yingmei SHAO Huili HU Xuechao
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, P.R.China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
762-764
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）