利用γ-巯丙基三乙基硅烷(γ-MPTS)对纳米氧化钛颗粒(p-TiO2)进行了表面修饰引入巯基(-SH),采用双氧水氧化的方法制备了表面带有-SO3 H的纳米氧化钛颗粒(s-TiO2).利用溶液共混的方式将s-TiO2和预交联的PVA溶液混合后涂覆成膜,制备了一系列PVA/nano-TiO2有机-无机杂化膜.对杂化膜的结构测试结果表明其具有良好的机械稳定性,热稳定性和耐碱性:拉伸强度为37.0～53.4 MPa,断裂伸长率为43.2％～146.0％;65℃碱液中的溶胀度为205.4％～220.2％,质量损失为10.0％～15.9％.制备的杂化膜含水量(WR)为90.9％～105.6％,离子交换容量(IEC)为0～0.025mmol/g.利用NaOH/Na2 WO4体系模拟扩散渗析回收NaOH的结果表明:25℃时OH-渗析系数为0.013～0.015 m/h,分离系数为21.8～30.1.
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