角蛋白/多壁碳纳米管复合纤维的制备  

Preparation of keratin/multi-walled carbon nanotubes composite fibers

作　　者：赵明宇[1,2,3] 刘海辉[1,2,3] 王学晨[1,2,3] 张兴祥[1,2,3] 

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387 [2]天津工业大学天津市先进纤维与储能技术重点实验室,天津300387 [3]天津工业大学材料科学与工程学院,天津300387

出　　处：《纺织学报》2017年第2期21-25,共5页Journal of Textile Research

基　　金：天津市应用基础与前沿计划重点项目(13JCZDJC32100);国家重点研发计划"重点基础材料技术提升与产业化"专项(2016YFB0303000)

摘　　要：为促进废旧羊毛的回收利用,采用L-半胱氨酸还原法溶解羊毛提取角蛋白,将羊毛再生角蛋白溶于碳酸钠/碳酸氢钠缓冲溶液中配制成纺丝液,并且向其中添加经傅克反应处理的功能化多壁碳纳米管,通过湿法纺丝制备再生角蛋白/功能化碳纳米管复合纤维。研究结果表明:碳纳米管均匀的分散在复合纤维中,没有发生团聚现象,并且与角蛋白基体有着良好的界面作用;碳纳米管加入对纤维的结晶度有所提高,并且能够诱导角蛋白内部形成较多的β-折叠的二级结构构象;随着碳纳米管的加入,复合纤维的拉伸断裂强度增加,当碳纳米管质量分数为0.15%时,拉伸断裂强度达到最大(91.5±12.6)MPa,比纯角蛋白纤维提高了139%。To promote the recycling of waste wool, keratin was extracted from the waste wool using Lcysteine as reducing agent, and spinning solution was prepared by dissolving the regenerated keratin in the sodium carbonate-sodium bicarbonate buffer. Multi-walled carbon nanotubes were functionalized with 4-substituted benzoic acid by direct Friedel-Crafts acylation. Regenerated keratin/functionalized multi- walled carbon nanotubes （F-MWCNTs） composite fibers were wet-spun from the mixed solution of F- MWCNTs suspension and keratin solution. The results show that F-MWCNTs were homogeneously dispersed in keratin matrix without any aggregation. With the addition of F-MWCNTs, the composite fibers present crystallinity and content of β-sheet greater than pure keratin fibers. The low addition of F- MWCNTs enhanced the mechanical properties of composite fibers, and the highest breaking stress of the composite fibers reaches 91.5 ±12.6 MPa with 0. 15% F-MWCNTs, which is improved by 139% in comparison with that of pure keratin fibers.

关 键 词：羊毛角蛋白 蛋白纤维 多壁碳纳米管 傅克反应 湿法纺丝 

分 类 号：TQ342[化学工程—化纤工业]