膜科学与技术

扩散渗析用磺化聚醚醚酮/棒状介孔氧化硅共混膜的制备及性能研究

作者：张雅丽，陈晓鹏，苗继斌，伍斌，葛倩倩，夏茹，钱家盛

单位：安徽大学化学化工学院，安徽省绿色高分子材料重点实验室，中国，合肥 230601

关键词：昌扩散渗析;碱回收;磺化聚醛醛酮;介孔氧化硅

出版年,卷(期):页码： 2022,42(6):118-124

摘要：

昌首先利用浓硫酸与聚醛醛酮(PEEK)反应得到磺化聚醛醛酮(SPEEK),然后采用改进的 Stober法成功制备了棒状介孔氧化硅(MS),通过容液共混的方式将 MS与 SPEEK容液混合制得一系列 SPEEK/MS共混膜.测试了膜的基本性能与微观结构 ,并利用 NaOH/Na2WO4 体系的扩散渗析过程模拟了共混膜的分离性能.结果显示 ,在 MS添加量为 4%时 ,共混膜的分离因子最高达到 34.7,而纯SPEEK膜的分离因子为 13.6,说明MS的引入可显著提高膜的离子选择性 ,可以有效阻隔钨酸根离子(WO42- )的传递

Sulfonated poly ether ether ketone (SPEEK) was obtained by sulfonating poly ether ether ketone (PEEK) with concentrated sulfuric acid, and rod-shaped mesoporous silica (MS) was successfully synthesized by modified Stöber method. A series of SPEEK/MS composite membranes were prepared by blending MS suspension and SPEEK solution directly. The basic properties and microscopic structures of as-prepared membranes were measured. The separation performance of the composite membranes were tested by the diffusion dialysis process of NaOH/Na2WO4 system. And results showed that the composite membrane possessed the optimal separation factor of 34.7 while the addition of MS was 4%, which was higher than that of pure SPEEK membrane (13.6). This confirmed that incorporation of MS could significantly improve the selectivity of the composite membranes and prevent the transport of the WO42- ions.

张雅丽(1996-),女 ,安徽蚌埠人 ,硕士生 ,研究方向为有机无机杂化膜研究

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