基于静电纺丝技术对有色羊绒的剥色与降解再生

Color stripping and degradation regeneration of colored cashmere based on electrospinning technology

为回收利用羊绒纤维,采用L-半胱氨酸协同二氧化硫脲体系对羊绒纤维进行剥色降解处理,提取其中的角蛋白与丝胶、聚乙烯醇(PVA)共混静电纺丝制备纤维膜以供纤维再生。探讨了角蛋白和PVA的质量比、纺丝液质量分数、角蛋白和丝胶的质量比以及静电纺丝设备电压、接收距离、注射速度对纺丝效果的影响。结果表明,最佳静电纺丝工艺如下:纺丝液质量分数为7%、角蛋白与PVA的质量比为30/70、角蛋白与丝胶的质量比为4∶1、设备电压为20 kV、接收距离为13 cm、流速为3 mL/h。制备的角蛋白/PVA纤维膜中纤维结构均匀,纤维膜表面光滑。随着角蛋白和丝胶质量比增大,角蛋白/丝胶/PVA纤维膜形貌变化不大,抗菌性能有所提高,对金黄色葡萄球菌和大肠埃希菌的抗菌率分别为55.32%和69.96%。

In order to recycle and utilize cashmere fiber,the L-cysteine synergistic thiourea dioxide system is used to strip and degrade cashmere fiber.The extracted keratin is electrospun blended with sericin and polyvinyl alcohol(PVA)to prepare fiber membrane for fiber regeneration.The effects of the mass ratio of keratin to PVA,the concentration of spinning solution,the mass ratio of keratin to sericin,the voltage of electrospinning equipment,the receiving distance and the injection speed on the spinning effect are discussed.The results show that the optimum electrospinning process is as follows:7%spinning solution concentration,mass ratio of keratin to PVA 30/70,mass ratio of keratin to sericin 4∶1,equipment voltage 20 kV,receiving distance 13 cm and flow rate 3 mL/h.The fiber structure of keratin/PVA fiber membrane is uniform and smooth.With the increase of the mass ratio of keratin and sericin,the morphology of keratin/sericin/PVA fiber membrane changes little,and the antibacterial performance is improved with antibacterial rate of Staphylococcus aureus and Escherichia coli of 55.32%and 69.96%.