PVA/CuSO_4·5H_2O复合膜的制备及其结构与性能研究  

Preparation,Structure and Properties of PVA/CuSO_4·5H_2O Membranes

作　　者：刘茜[1] 田华峰[1] 戈翔 李岩[1] 项爱民[1] 

机构地区：[1]北京工商大学材料与机械工程学院,北京100048

出　　处：《中国塑料》2016年第1期92-97,共6页China Plastics

基　　金：国家自然科学基金(51373004;51203004);北京市教委科研计划面上项目(KM201310011001);教师队伍建设--青年英才计划(YETP1453);北京市优秀人才培养资助青年拔尖个人项目(2014000026833ZK13);北京工商大学研究生科研能力提升计划项目

摘　　要：采用溶液流延法制备了不同五水硫酸铜(CuSO_4·5H_2O)含量的聚乙烯醇(PVA)/CuSO_4·5H_2O复合膜,采用扫描电子显微镜(SEM)、热失重分析(TG)、X射线衍射(XRD)、力学性能测试和透气性能测试等方法研究了CuSO_4·5H_2O对PVA薄膜的结构与性能的影响。结果表明,所制得的复合膜透明性好,Cu^(2+)可与PVA上—OH络合破坏PVA分子内和分子间的氢键作用,降低PVA的结晶度;该复合膜具有比纯PVA膜更高的拉伸强度和更低的断裂伸长率,表明Cu^(2+)交联可明显改善薄膜的力学性能;在75%相对湿度下CuSO_4·5H_2O的引入能促进薄膜对CO_2气体的透过作用,但对O_2的透过系数基本没有影响。Poly（vinyl alcohol） （PVA）/CuS04·5H2O membrane was prepared by solution casting. The structure and properties of the membrane were investigated by scanning electron microscope, thermogravimetric analysis, X-ray diffraction, mechanical testing, and gas permeability testing. After introducing Cu2＋ ions into PVA, bonding between Cu2＋ and PVA chains may be formed and therefore reduce the crystallinity of the membranes. The membrane possessed higher tensile strength and lower elongation at break compared with neat PVA membrane. The cross-linking of CuS04·5H2O markedly improved the mechanical properties of the membrane. Under 75 relative humidity, the addition of Cu2＋ to PVA membranes resulted in dramatical improvement of COe permeability coefficient, while the Oe permeability coefficient almost did not change.

关 键 词：聚乙烯醇 五水硫酸铜 复合膜 交联 透气性能 

分 类 号：TB332[一般工业技术—材料科学与工程]