高通量聚间苯二甲酰间苯二胺超滤膜的制备与性能研究  

Preparation and properties of high-flux poly(m-phenylene isophthalamide)ultrafiltration membranes

作　　者：刘春波 刘玮[3] 徐瑞松 唐石云 赵蔚 朱志扬 何沛 由博妍 冯欣 张冉 侯蒙杰 李琳 王同华 LIU Chunbo;LIU Wei;XU Ruisong;TANG Shiyun;ZHAO Wei;ZHU Zhiyang;HE Pei;YOU Boyan;FENG Xin;ZHANG Ran;HOU Mengjie;LI Lin;WANG Tonghua(Yunnan Key Laboratory of Tobacco Chemistry,China Tobacco Yunnan Industry Co.,Ltd.,Kunming 650231,China;Hongta Tobacco Co.,Ltd.,Yuxi Cigarette Factory Roll Pack a Workshop,Yuxi,653100,China;State Key Laboratory of Fine Chemicals,Dalin Key Laboratory of Membrane and Membrane Process,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China;Fushun City Food Inspection and Testing Institute,Fushun 113000,China)

机构地区：[1]云南中烟工业有限责任公司,云南省烟草化学重点实验室,昆明650231 [2]红塔烟草(集团)有限责任公司,玉溪卷烟厂卷包一车间,玉溪653100 [3]大连理工大学化工学院精细化工国家重点实验室,大连市膜与膜过程重点实验室,大连116024 [4]抚顺市食品检验检测所,抚顺113000

出　　处：《膜科学与技术》2024年第5期100-107,共8页Membrane Science and Technology

基　　金：云南省“兴滇英才支持计划”产业创新人才项目;云南中烟科技项目(2021JC04)。

摘　　要：以聚间苯二甲酰间苯二胺(PMIA)为膜材料,H_(2)O和CaCl_(2)为混合添加剂,采用L-S相转化法制备PMIA基超滤膜,并分别考察了H_(2)O和CaCl_(2)浓度对超滤膜的孔结构、孔隙率、水渗透通量以及对葡聚糖截留性能的影响规律.结果表明,引入适量H_(2)O作为助溶剂,会提高CaCl_(2)在DMAc溶剂中的溶解度,降低溶剂与非溶剂的交换速率,延迟相分离使得膜形成更发达的海绵状孔和直通型指状孔结构,因而具有较高的孔隙率、纯水渗透率以及葡聚糖截留率;同样,向铸膜液体系中加入适量的CaCl_(2),离子-偶极作用会破坏PMIA分子间的氢键,因增加了铸膜液的热力学稳定性而延迟相分离.当H_(2)O的添加质量分数为10%,CaCl_(2)为4%时,所制备PMIA超滤膜的孔隙率高达73.7%,纯水渗透率为16970 L/(m^(2)·h·MPa),同时对相对分子质量为150000葡聚糖的截留率为90.5%,BSA截留率为98.9%,展现出良好的应用前景.In this work,ultrafiltration membranes derived from poly(m-phenylene isophthalamide)(PMIA)were prepared using L-S phase inversion method with H_(2)O and CaCl_(2) used as mixed additives.The effects of H_(2)O and CaCl_(2) concentrations on the pore structure,porosity,water flux,and dextran retention performance of the ultrafiltration membranes were investigated,respectively.Results showed that the introduction of an appropriate amount of H_(2)O as a cosolvent can enhance the CaCl_(2) solubility in the DMAc solvent,and reduce the exchange rate between solvent and non-solvent and delay phase separation,resulting in the formation of more developed sponge-like pores and straight finger-like pore structures and membranes with high porosity,high water flux and dextran retention rate.Similarly,adding an appropriate amount of CaCl_(2) to the casting solution can increase the thermodynamic stability of solution and also delay phase separation,since the ion-dipole interaction may disrupt the hydrogen bonds between PMIA molecules.With adding 10%(mass fraction)H_(2)O and 4%CaCl_(2),the porosity of the prepared PMIA ultrafiltration membrane was as high as 73.7%,the pure water flux was 16970 L/(m^(2)·h·MPa),and the retention rate of 150000 glucan and BSA were 90.5%and 98.9%,respectively.The prepared PMIA ultrafiltration membranes show a good application prospect.

关 键 词：超滤膜 芳香族聚酰胺 聚间苯二甲酰间苯二胺 添加剂 孔结构调控 

分 类 号：TQ028.8[化学工程]