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聚间苯二甲酰间苯二胺超滤膜的制备与性能研究

作者：司会芳¹，李琳¹，杨文华²，王春雷¹，宋西全²，王同华¹

单位： 1. 大连理工大学化工学院精细化工国家重点实验室炭素材料研究室炭膜及多孔材料课题组，大连116024； 2. 烟台泰和新材料股份有限公司，烟台 264000

关键词：聚间苯二甲酰间苯二胺；超滤膜；相转化；添加剂；孔结构

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2018,38(4):49-55

摘要：

以聚间苯二甲酰间苯二胺（PMIA）为膜材料，N,N-二甲基乙酰胺（DMAc）为溶剂，分别以氯化锂（LiCl）、聚乙烯吡咯烷酮（PVP）、聚乙二醇（PEG）为添加剂，采用相转化法制备PMIA超滤膜，研究了聚合物浓度、添加剂的种类对铸膜液体系及膜结构和性能的影响。结果表明：随着PMIA、LiCl、PVP和PEG含量的增加，铸膜液的粘度增加；随着PMIA、PVP和PEG含量的增加，铸膜液的热力学稳定性降低，但是LiCl的加入则使铸膜液的热力学稳定性增加。通过对膜结构和性能的分析可知，随着PMIA、LiCl和PVP含量的增加，膜的孔隙率和纯水通量降低，而PEG的增加则使膜的孔隙率和纯水通量先增加后降低，当PMIA含量为12%，PEG含量为6%时，膜纯水通量高达707.43 L/(m2·h)，所有膜对BSA都具有较高的截留率，均在99%以上。

Poly (m-phenylene isophthalamide) (PMIA) ultrafiltration membranes were prepared by L-S phase inversion method by using PMIA as membrane material, N,N-Dimethylacetamide (DMAc) as solvent, Lithium chloride (LiCl), polyvinylpyrrolidone (PVP) and Alcohol (PEG) as additive, The effects of polymer concentration and additive type on casting solution systems, membrane structure and performance were investigated. The results showed that the viscosity of the casting solution increased with the increasing of PMIA, LiCl, PVP and PEG content; and the thermodynamic stability of the casting solution decreased with the increasing of PMIA, PVP, and PEG content, but the addition of LiCl resulted in the thermodynamic stability of the casting solution increasing. Through the analysis of the structure and properties of the membrane, the membranes porosity and pure water flux decreased with the increasing of the concent of PMIA, LiCl and PVP, while the increasing of PEG addition caused that porosity and pure water flux increased and then decreased, a high pure water flux of 707.43 L/(m2·h) was achieved when the PMIA content was 12% and the PEG content was 6%, and all the PMIA membranes showed a good rejection for BSA as high as 99%.

基金项目：

国家重点研发计划项目（2017YFB0603403）；国家自然科学基金资助项目(21436009, 21506020, 21576035, 21676044)

作者简介：

第一作者简介：司会芳（1993-），女，河南周口人，硕士生，从事聚合物膜研究. * 通讯作者，E-mail：wangth@dlut.edu.cn

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