PLA固相接枝丙烯酸类单体及其嫁接丝胶蛋白的研究  

Study on PLA solid phase grafting of acrylic monomers and its grafted sericin

作　　者：王鑫 丁展 王成红 杨梦菲 麻文效 WANG Xin;DING Zhan;WANG Chenghong;YANG Mengfei;MA Wenxiao(School of Light Industry and Textile,Inner Mongolia University of Technology,Hohhot,010051)

机构地区：[1]内蒙古工业大学轻工与纺织学院,呼和浩特010051

出　　处：《内蒙古工业大学学报（自然科学版）》2023年第4期363-368,共6页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：内蒙古自治区级大学生创新创业训练计划项目(S202110128016);内蒙古自治区自然科学基金项目(2021LHMS05014)。

摘　　要：以过硫酸钾引发聚乳酸纤维(PLA)产生自由基,分别与丙烯酸(AA)、甲基丙烯酸(MAA)发生接枝共聚以在分子链引入羧基,之后通过低温交联剂聚碳化二亚胺进行丝胶蛋白在AA(MAA)/PLA纤维上的嫁接。选用阳离子染料对AA(MAA)/PLA纤维进行染色,结合上染率和K/S值的变化,分析了单体浓度、引发剂浓度、引发时间和引发温度对接枝率的影响。丝胶蛋白嫁接后,红外光谱发现,丝胶蛋白/AA(MAA)/PLA纤维引入了氨基;纤维表面羧基含量表明,低温交联剂与PLA大分子及丝胶蛋白发生了架桥反应,丝胶蛋白在PLA纤维表面的最大嫁接率分别可以达到6.16%、6.48%。整理后丝胶蛋白/MAA/PLA纤维具有了良好的抗氧化与抗菌功能(金黄色葡萄球菌/大肠杆菌的抗菌率分别为65.97%/61.81%)。Polylactic acid fiber(PLA)was initiated by potassium persulfate to produce free radicals,which were grafted with acrylic acid(AA)and methacrylic acid(MAA)to introduce carboxyl groups into the molecular chain,and then sericin was grafted on AA(MAA)/PLA fiber by low temperature crosslinking agent polycarbodiimide.The AA(MAA)/PLA fibers were dyed with cationic dyes.The effects of monomer concentration,initiator concentration,initiation time and initiation temperature on the grafting rate were analyzed according to the changes of dyeing rate and K/S value.After the grafting of sericin protein,the infrared spectrum found that the sericin protein/AA(MAA)/PLA fiber introduced an amino group;the carboxyl content of the fiber surface showed that the low-temperature crosslinking agent had a bridging reaction with PLA macromolecules and sericin protein,and the maximum grafting rate of sericin protein on the surface of PLA fiber could reach 6.16%and 6.48%,respectively.The finished sericin/MAA/PLA fiber had good antioxidant and antibacterial properties(the antibacterial rates of Staphylococcus aureus/Escherichia coli were 65.97%/61.81%).

关 键 词：聚乳酸 丝胶蛋白 引发 低温交联 接枝 

分 类 号：TS195.6[轻工技术与工程—纺织化学与染整工程]