Method for preparing fibroin nanofiber yarn with high degree of orientation by waste silks

Abstract

The invention belongs to the technical field of nanofiber preparation, and discloses a method for preparing a fibroin nanofiber yarn with high degree of orientation by waste silks. The recycled wastesilks are utilized, regenerated silk fibroin protein is prepared, and then is dissolved in formic acid in a certain proportion to prepare a spinning solution, and a pure silk yarn containing highly oriented nanofibers is prepared. According to the method, the characteristics of wet spinning and electrospinning are combined, a yarn formed by entanglement and cohesion of multiple highly oriented nanofibers is directionally pulled out, and then is collected by heating, guiding and winding; the prepared yarn has excellent biocompatibility and biodegradability, the mechanical properties are good, and a great application prospect in guiding cell oriented production and transportation and transmission of biological factors is achieved; and the preparation method is simple and easy to control, thecost is low, the scientific concept of green sustainable development is conformed, and the value of large-scale industrial promotion is achieved.

Description

technical field [0001] The invention belongs to the technical field of nanofiber preparation, and in particular relates to a method for preparing silk fibroin nanofiber yarn with high orientation degree by using waste silk. Background technique [0002] At present, nanofibers refer to fibers with a diameter less than 100nm, and subnanometer fibers refer to fibers with a diameter not greater than 800nm. The electrical, thermal and mechanical properties of these two fibers are quite different from those of ordinary fibers, and can be used in high Performance filter cloth, medical protective equipment and military equipment, etc. The conventional direct spinning method cannot produce sub-nanometer or nano-scale fibers. Generally, two immiscible polymers are blended and spun by electrospinning, but its products are limited to the production of short-fiber nonwovens. The mechanical strength and tensile elasticity are not ideal, and they are mostly used in non-woven products. The...

AI Technical Summary

Problems solved by technology

[0008] Through the above analysis, the existing problems and defects of the prior art are: these researches and the prior art make regenerated silk fibroin into corresponding nanofiber yarns or other scaffolds through cumbersome and complicated processes, and the oriented yarns produced by it The size is difficult to control, and the continuity is poor, so it cannot be continuously collected in large quantities

In addition, the characteristics of poor mechanical properties of regenerated silk fibroin have not been significantly improved. When mixing other polymers to achieve the above goals, it also increases production costs and greatly reduces production efficiency, which limits commercial large-scale promotion and application.

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