氯化钙甲酸溶解体系再生丝素长丝的制备及其性能

摘要

To improve the mechanical properties of the regenerated silk fibroin filaments, CaCl2-formid acid ( FA) system was adopted to dissolve degummed silk to obtain silk solution, and regenerated silk fibroin filaments were prepared by wet spinning process. The results indicated that different from that the present dissolved system can dissolve silk to the molecular level, silk fibroin can be dissolved in CaCl2-FA at room temperature, more importantly, which is characterized by preserving the fibrils structure. The breaking stress of the regenerated fibroin was improved nearly by 1 time after stretching, compared with conventional dissolution methods. The surface of silk fibroin filaments was smooth and uniform, and the degradation speed in protease XIV solution was relatively slow. It is a simple, efficient and environmentally friendly method to achieve continuous production of silk fibroin filaments.%为改善再生丝素长丝力学性能差的问题，选用氯化钙甲酸溶解体系获得丝素溶液并采用湿法纺丝技术制备再生丝素长丝。研究结果表明：与传统的三元溶剂溶解丝素至分子水平有所不同，氯化钙甲酸可在常温条件下溶解蚕丝，更重要的是在溶解过程中保留了原纤结构，在牵伸作用下再生丝素长丝的断裂应力较传统溶解方法提高了近1倍，纤维表面均匀光滑，在放线菌蛋白酶溶液中表现出相对缓慢的降解速度。该方法工艺简单，环境友好、高效，并可实现再生丝素长丝的连续制备。