文献类型：期刊文献

中文题名：α-Al_2O_3中空纤维复合膜的制备及其对甲醇水溶液的分离

英文题名：Preparation of α-Al_2O_3 Hollow Fiber Composite Membranes Used in Separation of Methanol-Water Solution

作者：张慧鑫[1];曹悦[1];马晓华[1];许振良[1]

机构：[1]华东理工大学化学工程联合国家重点实验室化学工程研究所膜科学与工程研发中心,上海200237

年份：2013

卷号：42

期号：4

起止页码：393

中文期刊名：石油化工

外文期刊名：Petrochemical Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD_E2013_2014】；

基金：国家自然科学基金项目(20076009;21176067);中央高校基本科研业务费课题(WA1214062)

语种：中文

中文关键词：氧化铝中空纤维膜;聚酰亚胺;渗透汽化;膜改性;甲醇分离

外文关键词：a-A1203 hollow fiber membrane; polyimide; pervaporation; membranemodification; methanol separation

摘要：采用聚酰胺酸(PA)-N,N-二甲基乙酰胺(DMAC)或PA-SiO2颗粒-DMAC涂膜液涂敷,通过300℃亚胺化或800℃碳化处理,对α-Al2O3中空纤维膜进行改性。在改性α-Al2O3中空纤维膜上浸涂聚乙烯醇(PVA)溶液并用戊二醛(GA)交联剂进行交联,制备α-Al2O3中空纤维渗透汽化复合膜,并对甲醇水溶液进行渗透汽化膜分离,考察了温度、料液浓度、涂膜液组成对复合膜分离性能的影响。实验结果表明,涂敷PA-DMAC涂膜液并经亚胺化的改性方式最佳,在此基础上浸涂12%(w)PVA溶液和6%(w)GA交联剂制备的复合膜分离性能较好;在温度40℃、压差100 kPa的条件下,对96%(w)甲醇水溶液的分离因子为25.0,渗透通量为15.0 g/(m2·h)。
α-A1203 hollow fiber membrane was modified by coating polyamide acid（PA）- N, N-dimethyl acetamide（DMAC） solution or PA-SiO2 particle-DMAC solution and then imidization at 300~C or carbonization at 800 %.α-A1203 hollow fiber composite membranes were prepared by dip-coating the modified membrane with polyvinyl alcohol（PVA） solution and crosslinking with glutaral（GA）. The composite membranes were used in the separation of methanol-water solution by pervaporation. The effects of PVA concentration and GA concentration on the separation were investigated. The experimental results showed that the optimal conditions for the preparation of the α-AI203 hollow fiber pervaporation composite membranes were PA-DMAC as the coating solution and then imidization, and 12%（w）PVA solution as the dip-coating solution and 6%（w） GA as the crosslinking agent. Under the conditions of 96%（w） methanol-water solution as the feedstock, temperature 40 ℃ and pressure difference 100 kPa, the permeation flux and separation factor were 15.0 g/（m2 · h） and 25.0.