化工进展2023，Vol.42Issue(12)：6478-6489,12.DOI:10.16085/j.issn.1000-6613.2023-0101
基于PI微球复合型全热交换膜的制备与性能
Preparation and properties of composite total heat exchange membranes based on polyimide microspheres
摘要
Abstract
Polyimide(PI)is a highly stable class of polymeric materials widely used in gas separation applications.However,research on new organic fillers for PI is limited with few reports on their application in total heat exchange and fresh air systems.In this study,the flower-like PI microspheres with a lamellar structure were synthesized using 1,4-phenylenediamine(pPDA)and benzophenone-3,3′,4,4′-tetracarboxylic dianhydride(BTDA)as monomers via a solvothermal process polymerization.By introducing PI microspheres into the polyamide(PA)separation layer via interfacial polymerization(IP),a series of PI-PA composite total heat exchange membranes were successfully fabricated.The effects of the addition method and amount of PI microspheres on membrane morphology,water contact angle,surface roughness,CO2 and water vapor permeability,and total heat exchange efficiency were thoroughly investigated.The homogeneous dispersion of PI microspheres in trimesoyl chloride(TMC)oil phase ensured simultaneous PI loading and interfacial polymerization,effectively avoiding particle stacking and interfacial defects.The optimized PI-PA-Ⅳ-2 composite film demonstrated outstanding moisture permeability and gas resistance with CO2 permeability decreasing from 21.04GPU to 3.64GPU and water vapor permeability increasing from 1763.45g/(m2·24h)to 1949.51g/(m2·24h).Moreover,this membrane exhibited comparable heat exchange efficiency(97.47%)and enthalpy exchange efficiency(71.41%)to commercial paper membranes,highlighting its potential as a valuable approach for the high-efficiency total heat exchange membranes.关键词
聚酰亚胺/分离/膜/界面/阻气/全热交换效率Key words
polyimide/separation/membranes/interface/gas barrier/total heat exchange efficiency分类
化学工程引用本文复制引用
罗伶萍,王慧敏,朱泰忠,张良,刘梦娇,黄菲,薛立新..基于PI微球复合型全热交换膜的制备与性能[J].化工进展,2023,42(12):6478-6489,12.基金项目
国家自然科学基金(NSFC-21975222). （NSFC-21975222）
