PVA/P(AA-Co-AN)/PVA渗透汽化膜的研究  

Study on Pervaporation Performance of PVA/P(AA-Co-AN)/PVA Membrane

作　　者：庞向川[1] 邓新华[1,2] 孙元[1] 杜金丽[1] 

机构地区：[1]天津工业大学材料科学与工程学院,天津300160 [2]天津工业大学中空纤维膜材料与膜过程国家教育部重点实验室,天津300160

出　　处：《精细化工》2011年第1期45-49,共5页Fine Chemicals

摘　　要：制备一种PVA/P(AA-Co-AN)/PVA复合膜用于甲醇水溶液的分离,膜的主体部分P(AA-Co-AN)由添加纳米S iO2粉末的丙烯酸(AA)和丙烯腈(AN)通过溶液共聚制得,两侧为交联聚乙烯醇(PVA)。考察了复合膜在高质量分数甲醇水溶液中的溶胀性能,探讨了浸泡液温度及浸泡液质量分数对溶胀度的影响,测试了复合膜的力学性能。考察了不同单体配比〔n(AA)∶n(AN)〕所制备的复合膜在不同质量分数甲醇水溶液,不同温度下的渗透汽化性能。结果显示,复合膜在高质量分数甲醇水溶液中具有良好的溶胀性能及渗透汽化性能;在n(AA)∶n(AN)=1∶1下所制备的复合膜,对高质量分数甲醇水溶液分离效果最佳,60℃时分离w(甲醇)=98%的水溶液,分离因子可达1 534,通量为583 g/(m2.h)。The PVA/P（AA-Co-AN）/PVA composite membrane was prepared to separate methanol from aqueous solution.Acrylic acid（AA） and acrylonitrile（AN） were synthesized by the solution polymerization with nanometer SiO2.The copolymer solution P（AA-Co-AN） was made into the main body of the membrane,with the polyvinyl alcohol（PVA） acetal membrane on both sides,to make the composite pervaporation membrane.The swelling behavior of membrane in the methanol dense aqueous solution was explored.The effect of the dipping temperature and concentration on the swelling degrees was also measured.The mechanical property of the membrane was investigated by the stretching test.The performances of the membranes prepared with different n（AA）∶n（AN） ratios were investigated through pervaporation experiments at different temperatures and different feed compositions.The results of swelling and pervaporation experiments show that the membrane has an encouraging swelling and pervaporation behavior in the methanol dense aqueous solution.The membrane prepared with n（AA）∶n（AN）=1∶1 gave the highest separation factor of 1 534 and a permeation flux of 583 g/（m2·h） at 60 ℃ in the pervaporation of the w（methanol）=98% aqueous solution.

关 键 词：渗透汽化 甲醇水溶液 溶胀 功能材料 

分 类 号：TQ028.8[化学工程]