pH可控PVAm-g-PBA/PVA层层自组装在纤维素膜上的应用  

Application of pH Controllable Layer-by-Layer Self-assembly of PVAm-g-PBA/PVA on Cellulose Membrane

作　　者：余光华[1,2] 赵启航 黄婵娟 龙柱 张丹[1,3] YU Guang-hua;ZHAO Qi-hang;HUANG Chan-juan;LONG Zhu;ZHANG Dan(Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, China;WuxiInface New Material Technology Co., Ltd., Wuxi 214122, Jiangsu, China;State Key Laboratory of MolecularEngineering of Polymers, Fudan University, Shanghai 200433, China)

机构地区：[1]江南大学生态纺织教育部重点实验室,江苏无锡214122 [2]无锡英飞斯新材料科技有限公司,江苏无锡214122 [3]复旦大学聚合物分子工程国家重点实验室,上海200433

出　　处：《精细化工》2019年第2期218-224,共7页Fine Chemicals

基　　金：国家自然科学基金(31600478);中国博士后科学基金(2015M581723);江苏省自然科学基金(BK20140145);中央高校基本科研业务费专项资金(重点项目JUSRP51718A);江苏高校优势学科建设工程资助项目(苏政办发[2014]37);聚合物分子工程国家重点实验室(复旦大学)开放研究课题基金(K2018-22)~~

摘　　要：通过酰胺化反应将4-羧基苯硼酸(PBA)接枝到聚乙烯胺(PVAm)高分子链上,制得改性聚乙烯胺(PVAm-g-PBA),利用FTIR和1HNMR对其结构进行了表征。采用硅晶片和聚苯乙烯微球(PS)作为模拟物,将PVAm-g-PBA和聚乙烯醇(PVA)组装到其表面并研究了自组装过程中基材表面电荷的变化规律及自组装膜层厚度的变化。将PVAm-g-PBA与PVA通过pH可控的层层自组装方法处理再生纤维素膜表面。结果表明:PVAm-g-PBA的等电点为pH=7.9;在p H=9.5、与PVA组装上30层高分子膜时,再生纤维素膜的抗张强度与断裂伸长率分别提高了53%和76%。处理后的再生纤维素膜的机械性能得到了明显改善。The grafting 4-carboxylic phenylboric acid(PBA) onto the polyvinylamine(PVAm) polymer chain by amination reaction was conducted to prepare modified polyvinylamine PVAm-g-PBA. FTIR and 1HNMR were used to characterize the structure of PVAm-g-PBA. Afterwards, PVAm-g-PBA and polyvinyl alcohol(PVA) were assembled on the surface of mimics(silicon wafers and polystyrene microspheres), and the change in the surface charge of the substrate and the thickness of the self-assembled film during the self-assembly process were studied. Subsequently, both of the modified polyvinylamine and polyvinyl alcohol were used to treat the regenerated cellulose membrane surface through pH controllable layer-by-layer self-assembly to improve the mechanical elongation. The results showed that the isoelectric point of PVAm-g-PBA was pH 7.9. When the layer number of the polymer self-assembly film was 30 at pH 9.5, the tensile strength and tensile stretch of the regenerated cellulose membrane improved by 53% and 76%, respectively. The mechanical properties of the treated regenerated cellulose membrane were significantly improved.

关 键 词：层层自组装 纤维素膜 机械性能 聚乙烯胺 硼酸酯 功能材料 

分 类 号：TQ317.9[化学工程—高聚物工业]