UIO-66-NH2渗透汽化复合膜制备及乙醇脱水  

Preparation of UIO-66-NH2 pervaporation composite membrane and its application in dehydration of ethanol

作　　者：仲华 谢浩然 马晓华[2] 许振良[2] ZHONG Hua;XIE Haoran;MA Xiaohua;XU Zhenliang(Shanghai SECCO Petrochemical Company Limited, Shanghai 201507, China;Shanghai Key Laboratory of Multiphase Structure Material Chemical Engineering, Membrane Science and Engineering R&D Lab, Chemical Engineering Research Center, East China University of Science and Technology, Shanghai 200237, China)

机构地区：[1]上海赛科石油化工有限责任公司,上海201507 [2]上海市多相结构材料化学工程重点实验室,华东理工大学化学工程研究所,膜科学与工程研发中心,上海200237

出　　处：《膜科学与技术》2019年第3期79-86,共8页Membrane Science and Technology

基　　金：国家自然科学基金项目(21406060)

摘　　要：金属有机骨架材料(MOFs)改性高分子渗透汽化复合膜是目前的研究热点.本文采用水热合成法制备UIO-66-NH2,利用旋涂法在改性的聚丙烯腈(PAN)底膜表面涂覆海藻酸钠(SA)、聚乙烯醇(PVA)和UIO-66-NH2混合液制备活性分离层,采用顺丁烯二酸交联分离层制备SA-PVA-MOF/PAN渗透汽化复合膜.考察了SA、PVA和UIO-66-NH2浓度对复合膜形貌结构、亲水性能和醇水分离效果的影响.研究结果表明,复合膜分离层含质量分数1%SA、4%PVA和0.8%UIO-66-NH2时,75℃条件下复合膜对质量分数85%乙醇水溶液的渗透通量最高可达905 g/(m2·h),此时分离因子为308.Metal-organic frameworks(MOFs) material modified pervaporation membrane is an eternal research hotspot of pervaporation technology. In this work, UIO-66-NH2 was prepared by hydrothermal synthesis. Polyacrylonitrile(PAN) membrane was prepared by non-solvent induced phase separation and was used as the base membrane of composite membrane after alkali treatment. The active separation layer consisting of sodium alginate(SA), polyvinyl alcohol(PVA) and UIO-66-NH2 was coated on the surface of PAN by spin-coating, followed by cross-linking with maleic acid. The effects of concentrations of SA, PVA and UIO-66-NH2 on the morphology, hydrophilicity and separation performance of the composite membrane were investigated. The results showed that the permeation flux of the composite membrane was up to 905 g/(m2·h), along with a separation factor of 308 by dehydration 85%(mass fraction) ethanol solution at 75 ℃.

关 键 词：UIO-66-NH2 PVA SA 渗透汽化复合膜 醇水分离 

分 类 号：TQ028[化学工程]