静电纺丝素纤维的微细结构

Microstructures of electro-spun silk fibroin fiber

以再生丝素甲酸溶液为纺丝液,在质量分数为9%时,研究电压、喷丝头到接收屏之间的距离(C-SD)对静电纺丝素纤维微细结构的影响。结果表明,在相同C-SD(10 cm)不同电压和相同电压(12 kV)不同C-SD的条件下,质量分数为9%的再生丝素甲酸溶液具有良好的静电可纺性。当C-SD为10 cm时,随电压的升高,静电纺丝素纤维的分子构象变化复杂,纤维的结晶度也呈无规律性变化;当电压为12 kV时,随C-SD的增加,静电纺丝素纤维内无规和α-螺旋构象的分子含量增加,纤维的结晶度呈现先略增大后大幅下降的趋势。

Studied the influence of voltage and distance from spinneret to collecting screen on microstructures of electro-spun silk fibroin fiber with regenerated silk fibroin （SF）-formic acid as the spinning solution at the concentration of 9 %. The results showed that 9 % is an ideal concentration of SF-formic acid solution which has good spinnability when the distance is constant （10 cm） with varied voltage or the voltage is constant （12 kV） with varied the distance. When the distance is 10 cm, there is a complex change in molecular conformation of the fiber with the increase of voltage, and the variation rule of crystallinity is also in discorder. When the voltage is 12 kV, the molecular weight of random/α-helical conformation in the fiber increases with the increase of the distance, but the crystallinity increased only slightly, then decreases sharply.