再生角蛋白凝胶对纺织退浆废水中浆料分子的吸附性能  

Sorption properties of regenerated keratin gels to size macromolecules in textile desizing wastewater

作　　者：杨美慧 李博 沈艳琴[1,2] 武海良[1,2] YANG Meihui;LI Bo;SHEN Yanqin;WU Hailiang(School of Textile Science and Engineering,Xi'an Polytechnic University,Xi'an,Shaanxi 710048,China;Key Laboratory of Functional Textile Material and Product,Ministry of Education,Xi'an Polytechnic University,Xi'an,Shaanxi 710048,China;China National Textile and Apparel Council Key Laboratory for Silk Functional Materials and Technology,Soochow University,Suzhou,Jiangsu 215123,China)

机构地区：[1]西安工程大学纺织科学与工程学院,陕西西安710048 [2]西安工程大学功能性纺织材料及制品教育部重点实验室,陕西西安710048 [3]苏州大学纺织行业丝绸功能材料与技术重点实验室,江苏苏州215123

出　　处：《纺织学报》2024年第2期142-152,共11页Journal of Textile Research

基　　金：陕西省自然科学基础研究计划项目(2023-JC-QN-0423);中国纺织工业联合会应用基础研究项目(J202203);纺织行业丝绸功能材料与技术重点实验室开放课题项目(SDHY2235);陕西省教育厅科研计划项目(23JY031)。

摘　　要：为实现废弃角蛋白纤维资源的高值化循环利用,在采用“还原预处理-甲酸”溶解法获取角蛋白多肽并引入α-硫辛酸进行化学改性基础上,制备再生凝胶材料用于纺织退浆废水中浆料分子的吸附处理。借助扫描电子显微镜、傅里叶红外光谱等测试技术对角蛋白凝胶的结构和性能进行表征。针对聚乙烯醇(PVA)和淀粉2种浆料,探究凝胶对不同浆料分子的吸附规律及机制。结果表明:角蛋白凝胶具有均匀的三维孔隙结构,其化学组成和官能团结构与原纤维基本一致,且结晶程度较高;该凝胶对溶液体系中PVA分子的吸附量和去除率分别为16.278 mg/g和30.013%,对淀粉浆料则可达到133.234 mg/g和28.868%;此外,吸附动力学和热力学研究显示,角蛋白凝胶对2种浆料的吸附规律均符合准二级动力学模型,其中对PVA分子主要为物理吸附作用,而对淀粉则可能存在化学吸附效果。Objective The effective recycling of waste protein fiber resources is one of the important aspects to achieve green and sustainable development of textile industry.In this study,regenerated keratin gels were prepared from waste wool fibers and applied to the sorption treatment of textile desizing wastewater.By exploring the sorption performance and mechanism of keratin gels to two common types of sizes,the research foundation is provided for promoting the industrialized application of this method.Method On the basis of the preliminary study,the keratin polypeptides were extracted by"reducing agent-formic acid method",and then the polypeptides were modified byα-lipoic acid.These modified keratin polypeptides were prepared for creating regenerated gel materials by dialysis and freeze-drying.The sorption properties of the keratin gels to polyvinyl alcohol(PVA)size and starch size were studied,and the sorption mechanism was discussed by using the sorption kinetics and sorption isotherm model.Results The experiment was based on the"reduction pretreatment-formic acid dissolution method",by adding the modifier α-lipoic acid for grafting modification,and then by"dialysis-freezing"method to prepare the keratin gel material.The photograph of the gel structure illustrated that the keratin gel was relatively fluffy and dense,and the microscopic morphology presented the characteristics of uniform pores with the pore size of about 3-4μm.In comparison with the chemical structures of wool,the keratin gel material retained the basic chemical structure of keratin molecule,in which the keratin amide II band was blueshifted due to the transformation of the aggregation state of polypeptide molecules in the gel.Compared with the sulfur content on the surface of wool and keratin gel,the keratin gel was located at 169.58 eV and 170.68 eV.The results indicated thatα-lipoic acid was effectively grafted to the sulfhydryl group on the keratin polypeptide macromolecular chain.In addition,the peak intensity of the gel at 21°increased sig

关 键 词：角蛋白凝胶 天然生物质 生物吸附剂 纺织退浆废水 染料 吸附动力学 

分 类 号：TS199[轻工技术与工程—纺织化学与染整工程]