聚间苯二甲酰间苯二胺平板膜的制备及其性能研究  

Preparation and properties research of poly(m-phenylene isophthalamide)flat-sheet membrane

作　　者：郑喜 王涛 任永胜[2] 赵珍珍 王雪琪 赵之平 ZHENG Xi;WANG Tao;REN Yongsheng;ZHAO Zhenzhen;WANG Xueqi;ZHAO Zhiping(School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 102488,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Department of Chemistry&Chemical Engineering,Ningxia University,Yinchuan 750021,Ningxia,China)

机构地区：[1]北京理工大学化学与化工学院,北京102488 [2]省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏大学化学化工学院,宁夏银川750021

出　　处：《化工学报》2022年第10期4707-4721,F0004,共16页CIESC Journal

基　　金：国家重点研发计划项目(2021YFC2101202);省部共建煤炭高效利用与绿色化工国家重点实验室开放课题资助项目(2022-K57)。

摘　　要：以聚间苯二甲酰间苯二胺(PMIA)为制膜原料,氯化锂(LiCl)、聚乙二醇(PEG-400)和聚乙烯吡咯烷酮(PVP)为添加剂,通过非溶剂诱导相转化法制备了PMIA平板膜,系统考察了聚合物浓度、添加剂种类和含量对PMIA膜结构和性能的影响。结果表明,聚合物浓度和LiCl含量增加,铸膜液黏度增大,导致膜孔径减小,纯水通量降低。而PEG含量的增加,使得聚合物链呈现舒展状态,膜孔径增大,纯水通量升高,亲水性增强。随着PVP含量的增加,膜的纯水通量先升高后降低,膜的亲水性变差。当PMIA的质量分数为9%,LiCl的质量分数为2.8%,PVP的质量分数为1.2%时,膜的纯水通量高达1421.55 L·m^(-2)·h^(-1)·bar^(-1),对牛血清蛋白(BSA)的截留率为80%,展现出较高的渗透性,为制备高性能膜材料提供了新的思路。PMIA flat-sheet membranes were prepared by non-solvent induced phase inversion method.Specifically,poly(m-phenylene isophthalamide)(PMIA)as polymer materials,lithium chloride(LiCl),polyethylene glycol(PEG-400)and polyvinyl pyrrolidone(PVP)as additives were blended to form casting solution.The effects of polymer concentration,additive type and content on the structures and properties of PMIA membranes were systematically investigated.The results exhibited that with the increase of polymer concentration and LiCl content,the viscosity of the casting solution was enhanced,resulting in the decrease of pore size and pure water flux.While the polymer chains were stretched with the increasing content of PEG,which made pore size and water flux of membranes improved.Then,with increasing PVP additive,the pure water flux of the membrane was increased firstly and then decreased,and the hydrophilicity of the membrane became worse.When the mass fraction of PMIA was 9%,LiCl was 2.8%and PVP was 1.2%,the pure water flux of the membrane was as high as 1421.55 L·m^(-2)·h^(-1)·bar^(-1) with 80%rejection of bovine serum albumin(BSA)maintained.The high permeability provided a new idea for the preparation of high-performance membrane materials.

关 键 词：平板膜 废水 分离 聚合物 聚间苯二甲酰间苯二胺 添加剂 孔结构 

分 类 号：TQ028.8[化学工程]