疏水性Silicalite-1/zein复合负载膜的制备及醇/水分离性能  

Preparation of hydrophobic Silicalite-1/zein membrane and pervaporation separation of ethanol/water mixtures

作　　者：马亚鲁[1] 李宇婷[2] 王丰[2] 王鹏[2] 李国书[1] 方武成[1] 

机构地区：[1]天津大学理学院,天津300072 [2]天津大学化工学院,天津300072

出　　处：《膜科学与技术》2013年第4期42-46,共5页Membrane Science and Technology

基　　金：国家自然科学基金(50972103);教育部留学回国人员科研启动基金(2009-1001)

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Sili-calite-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左右复合负载膜.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0.73～0.82kg/(m2·h)和4.5～8.7.A 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 improved the dispersivity and homogeneity of Silicalite-1 particles in zein ethanol solution. The homogeneous Silicalite-1/zein composite membrane has an average thickness of 10 μm. The pervaporation experiments showed that the Silicalite-1/zein composite membrane could effectively concentrate the ethanol solutions of 3% and 50% （ mass fraction ） by pervaporation process. The total permeation fluxes and separation factors of ethanol at 303 K and 313 K are from 0. 73 to 0. 82 kg/（m2·h）and from 4. 5 to 8. 7, respectively.

关 键 词：SILICALITE-1 zein复合膜 表面改性 渗透蒸发 乙醇 水分离 

分 类 号：TQ028.8[化学工程]