膜科学与技术

高通量超支化聚硅氧烷复合膜渗透汽化分离水中正丁醇

作者：白云翔，朱元华，张春芳，顾瑾，孙余凭

单位：江南大学食品胶体与生物技术教育部重点实验室化学与材料工程学院无锡 214122

关键词：渗透汽化; 超支化聚硅氧烷; 正丁醇

出版年,卷(期):页码： 2013,33(3):64-69

摘要：

为得到高通量的水中脱除丁醇渗透汽化膜HPSiO-c-PDMS，本文采用AB2型单体缩合法合成了超支化聚硅氧烷并将其与端羟基聚硅氧烷（PDMS）交联制备渗透汽化复合膜。对超支化聚硅氧烷和HPSiO-c-PDMS膜进行了化学结构和形态表征，并系统研究了PDMS分子量大小对膜结构及其渗透汽化性能的影响。结果表明：超支化聚合物支化度(DB)达到0.73。HPSiO-c-PDMS膜具有较大的通量和分离因子，随着PDMS分子量的增加，其渗透通量减小而分离因子增加。

Hyperbranched polysiloxane was prepared with a one-pot polymerization process of AB2 type monomer, which was used to fabricate a pervaporative membrane, HPSiO-c-PDMS, to recover n-butanol from aqueous solution. The chemical structure and morphology of the hyperbranched polysiloxane and HPSiO-c-PDMS membrane were characterized. In addition, the effect of molecular weight of PDMS on the chain structures and pervaporation performance of HPSiO-c-PDMS membranes were also systematically studied. The results indicated the degree of branching (DB) of hyperbranched polysiloxane was 0.73 and HPSiO-c-PDMS membrane has large flux and separation factor. With increasing of the molecular weight of PDMS, the separation factor increased and total flux decreased.

作者简介：白云翔（1972-），男，内蒙古，主要研究方向，膜分离 *通讯联系人，E-mail：sunyp2003@yahoo.com.cn.

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