废旧羊绒制品的L-半胱氨酸回收法  

L-cysteine recovery method from waste cashmere products

作　　者：白云 麻文效 胡丙南 BAI Yun;MA Wenxiao;HU Bingnan(College of Light Industry and Textile,Inner Mongolia University of Technology,Hohhot 010080,China)

机构地区：[1]内蒙古工业大学轻工与纺织学院,内蒙古呼和浩特010080

出　　处：《印染》2022年第1期43-46,共4页China Dyeing and Finishing

摘　　要：采用L-半胱氨酸对废旧羊绒纤维进行降解,并提取其中的角蛋白。通过分析L-半胱氨酸浓度、尿素浓度、pH、温度、时间对羊绒降解率和角蛋白提取率的影响,得到羊绒纤维降解的最优工艺为:pH=10,L-半胱氨酸0.7 mol/L,尿素4 mol/L,温度85℃,时间6 h。羊绒纤维的降解率最高为89%,角蛋白提取率为79%。提取到的角蛋白粉末分子质量为10000~40000 g/mol,可以纺丝加工或用作功能助剂。L-cysteine is used to degrade waste cashmere fibers and extract keratin.By analyzing the effects of L-cysteine concentration,urea concentration,pH,temperature and time on the degradation rate and extraction rate,the degradation process of cashmere fiber is optimized as follows:pH=10,L-cysteine 0.7 mol/L,urea 4 mol/L,85℃for 6 h.The degradation rate of cashmere fiber is up to 89%,and the extraction rate of keratin is 79%.The relative molecular weight of the extracted keratin powder is 10000-40000 g/mol,which can be reused for spinning processing or as a functional additive.

关 键 词：废旧羊绒制品 角蛋白 L-半胱氨酸 还原法降解 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]