论文部分内容阅读
通过湿法纺丝,可以在常用溶解/凝固剂体系中再生丝素蛋白(SF)长丝。将SF直接溶解在磷酸/甲酸(比例50/80~30/70)的混合溶剂内,以甲醇作为凝固浴。通过改变磷酸与甲酸的不同配比,研究了SF溶液的浓度和稳定性,同时表征了甲酸在混合溶剂体系内的作用。通过SEM和X-射线衍射(XRD)分析了再生SF长丝的形态结构和结晶结构。拉伸试验表明,经过一步溶解和凝固的加工方法所制得的再生SF长丝有着良好的力学性能,强度2.03 cN/dtex和断裂应变18%。本文使用了一种较为简单的纺丝方法来制备再生SF长丝,该法有望应用于实际生产。
Silk fibroin (SF) filaments can be regenerated in common dissolution / coagulant systems by wet spinning. The SF was dissolved directly in a mixed solvent of phosphoric acid / formic acid (ratio: 50/80 to 30/70) and methanol was used as a coagulation bath. By changing the ratio of phosphoric acid and formic acid, the concentration and stability of SF solution were studied, and the role of formic acid in the mixed solvent system was also studied. The morphology and crystal structure of regenerated SF filaments were analyzed by SEM and X-ray diffraction (XRD). Tensile tests show that the regenerated SF filaments obtained by one-step dissolution and solidification process have good mechanical properties, strength of 2.03 cN / dtex and strain at break of 18%. This article uses a relatively simple spinning method to prepare regenerated SF filaments, the method is expected to be used in actual production.