文献类型：期刊文献

英文题名：A Novel Seeding Method of Interfacial Polymerization-Assisted Dip Coating for the Preparation of Zeolite NaA Membranes on Ceramic Hollow Fiber Supports

作者：Cao, Yue[1];Wang, Ming[1];Xu, Zhen-liang[1];Ma, Xiao-hua[1];Xue, Shuang-mei[1]

机构：[1]East China Univ Sci & Technol, Membrane Sci & Engn R&D Lab, Chem Engn Res Ctr, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：8

期号：38

起止页码：25386

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20164002873677);WOS:【SCI-EXPANDED(收录号:WOS:000384518500049)】；

基金：The authors are thankful for the financial support received from the National Natural Science Foundation of China (Grants 20076009, 21176067, 21276075, and 21406060), Project of National Energy Administration of China (Grants 2011-1635 and 2013-117), the Shanghai Yang-fan Plan for Young Talents (Grant 14YF1404800), and the Open Project of State Key Laboratory of Chemical Engineering (Grant SKL-ChE-14C03).

语种：英文

外文关键词：alumina; ceramic hollow fiber; dehydration; interfacial polymerization; NaA; pervaporation; zeolite membrane

摘要：A novel seeding method combining interfacial polymerization (IP) technique with dip-coating operation was designed for directly coating nanosized NaA seed crystals (150 nm) onto the micrometer-sized alpha-Al2O3 hollow fiber support, in which the polyamide (PA) produced by IP acted as an effective medium to freeze and fix seed crystals at the proper position so that the controlled seed layer could be accomplished. While a coating suspension with only 0.5 wt % seed content was used, a very thin seed layer with high quality and good adhesion was achieved through dip coating twice without drying between, and the whole seeding process was operated at ambient conditions. The resulting zeolite NaA membranes not only exhibited high pervaporation (PV) performance with an average separation factor above 10000 and flux nearly 9.0 kg/m(2).h in dehydration of 90 wt % ethanol aqueous solution at 348 K but also demonstrated great reproducibility by testing more than eight batches of zeolite membranes. In addition, this seeding strategy could be readily extended to the preparation of other supported zeolite membranes for a wide range of separation applications.