Page 52 - 201902

第 36 卷第 2 期 精 细 化 工 Vol.36, No.2
201 9 年 2 月 FINE CHEMICALS Feb. 2019

功能材料
pH 可控 PVAm-g-PBA/PVA 层层自组装

在纤维素膜上的应用

1
1
1
余光华 1,2 ，赵启航 ，黄婵娟 ，龙 柱 ，张 丹 1,3*
（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）

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
1
（PVAm-g-PBA），利用 FTIR 和 HNMR 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 pH=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。
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
中图分类号：TQ317.9 文献标识码：A 文章编号：1003-5214 (2019) 02-0218-07

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

1
1,2
1
1
YU Guang-hua , ZHAO Qi-hang , HUANG Chan-juan , LONG Zhu , ZHANG Dan 1,3*
（1. Key Laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122, Jiangsu, China; 2. Wuxi
Inface New Material Technology Co., Ltd., Wuxi 214122, Jiangsu, China; 3. State Key Laboratory of Molecular
Engineering of Polymers, Fudan University, Shanghai 200433, China）
Abstract: 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
1 HNMR 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.
Key words: self-assembly; cellulose membrane; mechanical properties; polyvinyl amine; borate ester；functional
materials
Foundation items: National Natural Science Foundation of China (31600478); China Postdoctoral Science

收稿日期：2018-03-27; 定用日期：2018-08-07; DOI: 10.13550/j.jxhg.20180214
基金项目：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）
作者简介：余光华（1992—），男，硕士生。联系人：张 丹（1983—），男，副教授，硕士生导师，E-mail: zhangdan@jiangnan.edu.cn。