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Indexed by: Journal Article

Date of Publication: 2007-09-01

Journal: CHINESE CHEMICAL LETTERS

Included Journals: Scopus、ISTIC、SCIE

Volume: 18

Issue: 9

Page Number: 1148-1150

ISSN: 1001-8417

Key Words: sulfonated polyimide; proton exchange membrane; PEMFC

Abstract: A novel sulfonated diamine monomer, 1,2-dihydro-2-(3-sulfonic-4-aminophenyl)-4-[4-(4-aminophenoxy)-phenyllphthalazin-1-one (S-DHPZDA), was successfully synthesized by direct sulfonation of diamine 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4aminophenoxy)-phenyl]-phthalazin-1- one (DHPZDA). A series of sulfonated polyimides (SPIs), which can be used as the material of the proton exchange membrane (PEM) for the proton exchange membrane fuel cell (PEMFC), were prepared from 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA), S-DHPZDA, and nonsulfonated diamines DHPZDA. The structure of the monomer and polymers were characterized by FT-IR and H-1 NMR. The solubility of the S-DBPZDA-based SPIs has been improved due to the induction of the phthalazione moiety. The SPIs membranes have high thermo-stability, predominant swelling resistance with high ion exchange capacity. (c) 2007 Xiu Ling Zhu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.