耐溶剂聚酰亚胺/聚醚酰亚胺复合纳滤膜的制备及其性能  

Preparation and performance of solvent-resistant polyimide/polyetherimide composite nanofiltration membrane

作　　者：丁晓莉[1] 崔浩然 张良 范晓倩 程显昀 赵红永[1] DING Xiaoli;CUI Haoran;ZHANG Liang;FAN Xiaoqian;CHENG Xianyun;ZHAO Hongyong(State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387

出　　处：《天津工业大学学报》2024年第6期9-14,21,共7页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(21978214)。

摘　　要：为了提升纳滤膜在有机溶剂体系使用过程中的耐受性,选用O,O′-二(2-氨基丙基)聚丙二醇-嵌段-聚乙二醇-嵌段-聚丙二醇和均苯四甲酰氯作为两相单体,在聚醚酰亚胺超滤基膜上发生界面聚合反应制备耐溶剂复合纳滤膜,再选用O,O′-二(2-氨基丙基)聚丙二醇-嵌段-聚乙二醇-嵌段-聚丙二醇作为交联剂对复合膜进行交联改性处理;将交联膜浸泡在丙酮溶剂中以探究交联膜的耐溶剂性能。结果表明:复合纳滤膜被成功交联改性,且交联后膜表面的致密程度增加;亲水性也有所提升,接触角下降29%;交联前,丙酮溶胀后膜截留率下降70%,交联后膜截留率仅仅下降5%,纳滤膜的耐溶剂性能有很大提升。In order to improve the organic solvent resistance of nanofiltration membranes,O,O′-bis(2-aminopropyl)polypropylene glycol-block-polyethylene glycol-block-polypropylene glycol and pyromellitic chloride were selected as monomers to conduct interfacial polymerization on the polyetherimide ultrafiltration membrane to prepare solvent resistant composite nanofiltration membrane.Then,O,O′-bis(2-aminopropyl)polypropylene glycol-block-polyethylene glycol-block-polypropylene glycol was selected as the crosslinking agent to modify the composite membrane.The prepared crosslinked membrane was immersed in acetone solvent to investigate its solvent resistance.The results show that the composite nanofiltration membrane is successfully crosslinked and modified,and the compactness of the membrane surface increases after crosslinking;the hydrophilicity of the membrane surface has also been improved,with a 29%decrease in the contact angle.Before crosslinking,the membrane rejection decreases by 70%after acetone swelling,and that of the crosslinked membrane only decreases by 5%.The solvent resistance of the nanofiltration membrane is greatly improved.

关 键 词：耐溶剂 聚酰亚胺/聚醚酰亚胺复合纳滤膜 界面聚合 交联改性 

分 类 号：TS102.54[轻工技术与工程—纺织工程] TQ427.26[轻工技术与工程—纺织科学与工程]