以3-甲氧基苄胺改性聚乙烯基胺制备CO_2分离膜  

CO_2 separation membrane fabricated by 3-methoxy benzyl amine modified PVAm

作　　者：王树清[1] 乔志华[1] 王志[1] 

机构地区：[1]天津大学化工学院化学工程研究所,天津化学化工协同创新中心,化学工程联合国家重点实验室(天津大学),天津市膜科学与海水淡化技术重点实验室,天津300072

出　　处：《膜科学与技术》2016年第3期1-7,共7页Membrane Science and Technology

基　　金：国家自然科学基金项目(21436009);国家高技术研究发展计划(2012AA03A611)

摘　　要：为提高CO_2分离膜高压下的渗透选择性能,利用含苯环小分子胺3-甲氧基苄胺与聚乙烯基胺(PVAm)制备了PVAm-3-甲氧基苄胺涂膜液,并将其涂敷到聚砜(PSf)超滤膜上制备了PVAm-3-甲氧基苄胺/PSf固定载体复合膜.PVAm-3-甲氧基苄胺/PSf膜的红外谱图结果显示,3-甲氧基苄胺的伯胺基能与PVAm的伯胺基或酰胺基形成氢键交联网络.利用模拟烟道气组成的CO_2/N2混合气(体积比20/80),考察了PVAm-3-甲氧基苄胺/PSf膜和PVAm/PSf膜的渗透选择性能.结果表明,PVAm-3-甲氧基苄胺/PSf膜的CO_2渗透选择性能得到了大幅度提高,高压下更为显著.To improve the permeance and selectivity of CO_2 separation membrane at high pressure,polyvinylamine（PVAm）-3-methoxyl benzyl amine coating solution was prepared by mixing PVAm aqueous solution with 3-methoxy benzyl amine.The PVAm-3-methoxyl benzyl amine/polysulfone（PSf）fixed carrier composite membrane was prepared by coating PVAm-3-methoxyl benzyl amine solution on the PSf membrane.The ATR-FTIR spectra of the membrane showed that the intermolecular hydrogen bonds are formed between the primary amine groups of 3-methoxyl benzyl amine and primary amine or amide groups in PVAm.CO_2 permeance and CO_2/N2 selectivity of the PVAm-3-methoxyl benzyl amine/PSf and PVAm/PSf membranes were tested by using CO_2/N2 mixed gas（20/80 by volume）.The PVAm-3-methoxyl benzyl amine/PSf membrane displays high CO_2/N2 separation performance,especially at high pressure.

关 键 词：固定载体膜 3-甲氧基苄胺 CO2/N2分离因子 CO2渗透速率 

分 类 号：TQ051.893[化学工程]