膜科学与技术

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Preparation and performance study of PA/PMIA composite nanofiltration membrane

Authors： ZHANG Ran，WANG lei，SI Huifang，LI Lin，WANG Hua，WANG Tonghua

Units： 1. State Key Laboratory of Fine Chemicals, Group of Carbon Membranes and Porous Materials in Carbon Research Laboratory, Dalian Key Laboratory of Membrane Materials and Membrane Processes, School of Chemical Engineering, Dalian University of Technology, Dalian Liaoning 116024, China; 2. School of Kinesiology and Health Promotion, Dalian University of Technology, Dalian Liaoning 116024, China

KeyWords： PMIA; interfacial polymerization; nanofiltration membrane; Polyamide

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2023,43(4):129-135

Abstract：

PMIA ultrafiltration basement membrane was prepared by phase conversion using polyisophthaloyl-m-phenylenediamine (PMIA) as membrane material, LiCl and H2O as non-solvent additives, and N,N-dimethylacetamide (DMAc) as solvent. PA/PMIA composite nanofiltration membrane was prepared by interfacial polymerization with piperazine (PIP) as aqueous monomer and benzenetricarbonyl chloride (TMC) as oil-phase monomer. The effect of monomer concentration on the permeation and separation performance of composite nanofiltration membrane was investigated, and when the monomer concentration increased, the water flux of the membrane decreased and the interception rate of Na2SO4 increased. When the concentration of aqueous monomer PIP was 0.5wt.%, the concentration of TMC of oil-phase monomer was 0.07wt.%, the reaction time was 30s, the post-treatment temperature was 70°C, and the post-treatment time was 3min, The water flux of the prepared PA/PMIA composite nanofiltration membrane was 50.89L/(m2•h•bar), the retention rate of Na2SO4 was 98.24%, the thickness of amide (PA) layer was 40nm, and the contact angle was 44°. The PA/PMIA composite nanofiltration membrane had stable Na2SO4 retention after 30 days immersion in organic solvents and acids and bases.

Funds：

1.云南中烟工业有限责任公司科技计划项目“烟草中致香成分精细化膜分离技术研究及应用”（2217081943）；2.煤炭高效清洁利用，大连理工大学科研创新团队（DUT2021TB03 2021.01-2023.12）；3.煤炭资源高效洁净利用研究，辽宁省“兴辽英才计划”项目（XLYC1908033,2020.01-2022.12）；4.大连市科技局重点领域创新团队支持计划，煤焦油清洁能源化和精细化学品转化技术（2019RT10）。

AuthorIntro：

张冉（1998.06.10），女，湖北省孝感市，硕士研究生，复合纳滤膜孔结构调控，E-mail：zhangran123@mail.dlut.edu.cn

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