磺化CS/PVA交联阳离子交换膜的制备与表征  

Preparation and Characterization of Sulfated Chitosan/Polyvinyl Alcohol Cross-Linked Cation Exchange Membrane

作　　者：郝建文[1] 戴晨伟[1] 刘永春 杨情 

机构地区：[1]安徽职业技术学院环境与化工学院,安徽合肥230011 [2]合肥学院化学与材料学院,安徽合肥230022

出　　处：《塑料》2018年第1期32-35,共4页Plastics

基　　金：2014年度安徽省教育厅自然科学重点项目(KJ2014A130);2014年度安徽省高校优秀青年人才支持计划(皖教秘人2014-181)

摘　　要：壳聚糖是来源广泛、廉价、低毒的高分子化合物,具有作为离子交换膜材料的潜在优势。通过将壳聚糖(CS)与1,3-丙烷酸内酯(PS)的开环磺化反应获得离子交换能力。为提高其力学性能和克服磺化以后成膜性下降的缺点,采取与聚乙烯醇(PVA)共混、加入正硅酸四乙酯(TEOS)通过溶胶-凝胶反应实现交联。采用流延法制备出一系列磺化CS含量不同的新型磺化壳聚糖/聚乙烯醇/二氧化硅杂化阳离子交换膜。运用ATR-FTIR、SEM、TGA、DMA进行表征,并测试了杂化膜的离子交换容量、水含量及线性膨胀率等。结果表明:离子交换容量的范围是0.10~0.65 mmol/g,水含量和线性膨胀率的范围分别为10%~25%,15%~20%。Chitosan（CS） was modified into sulfonated CS by reaction with 1,3 propane suhone（PS） for obtaining ion exchange group. Then, to enhance their mechanical properties, polyvinyl alcohol （PVA） was blended, and tetraethyl orthosilicate（TEOS） was introduced into matrix to cross-link with sulfonated CS by sol-gel method. Eventually, a serial of novel sulfonated CS/PVA cross-linked membrane with varied sulfonated CS content were prepared. On the basis, the effect of sulfonated CS content on physical and chemical properties was extensively investigated via ATR-FTIR, SEM, TGA and DMA. It was showed that the prepared membranes had good homogeneity, thermal stability and flexibility. In addition, ion exchange capacity, water uptake, linear expansion in water also were tested. The results were demonstrated that IEC augmented from 0. 10 to 0.65 mmol/g with the increasing content of sulfonated CS content and the range of water uptake and linear expansion in water was 10% - 25% , 15% - 20% , respectively.

关 键 词：壳聚糖 聚乙烯醇 杂化 离子交换膜 制备 表征 

分 类 号：TQ028.8[化学工程]