膜科学与技术

疏水性silicalite-1/zein复合担载膜的制备及醇/水分离性能评价

作者：马亚鲁¹? 李宇婷² 王丰² 王鹏² 李国书¹ 方武成¹

单位： 1天津大学理学院； 2天津大学化工学院，天津300072

关键词： silicalite-1/zein复合膜；表面改性；渗透蒸发；乙醇/水分离

出版年,卷(期):页码： 2013,33(4):42-46

摘要：

采用旋涂技术在多孔氧化铝基片上制备silicalite-1/zein疏水性复合膜，为增强silicalite-1粒子的疏水性和在zein基液中的均匀分散性，采用六甲基二硅氮烷的表面改性技术和球磨分散工艺，制备结构均一、厚度在10μm左右复合担载膜。渗透蒸发实验表明：silicalite-1/zein疏水性复合膜在303K 和313K下分别对含3%（质量分数，下同）和5%乙醇的水溶液进行乙醇组分的提浓，其总的渗透通量和乙醇分离因子分别为0.73~0.82 kg.m-2.h-1和4.5 ~ 8.7。

Hydrophobic silicalite-1/zein composite membrane supported on a porous alumina tablet was prepared by spin coating process. Surface modification by hexamethyldisilazane and ball-milling processes could improve the dispersivity and homogeneity of silicalite-1 particles in zein ethanol solution. The homogeneous silicalite-1/zein composite membrane has an average thickness of 10μm. The pervaporation experiments show that silicalite-1/zein composite membrane can effectively concentrate ethanol from 3% and 5% ( mass fraction ) ethanol feed by pervaporation process. The total permeation fluxes and separation factors of ethanol at 303K and 313K are from 0.73 to 0.82kg.m-2.h-1 and from 4.5 to 8.7, respectively.

马亚鲁（1969-），女，河北省故城县人，博士，副教授，从事功能性复合膜材料的设计、制备与应用研究。?联系人

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