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4-(4-Aminophenoxy)benzene-1,3-diamine-based covalent cross-linked sulfonated polyimide as proton exchange membranes in fuel cell

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Title 4-(4-Aminophenoxy)benzene-1,3-diamine-based covalent cross-linked sulfonated polyimide as proton exchange membranes in fuel cell
 
Creator Dhra, Gulshan
Kannan, Tharanikkarasu
 
Subject Covalent cross-linking
Fuel cell, Hydrolytic stability
Nafion®
Oxidative stability
Proton conductivity
Polyelectrolyte membrane
Sulfonated polyimide
 
Description 537-546
Hydrolytic and oxidative stabilities of sulfonated polyimide membranes are of significant concern when they are used as
fuel cell polyelectrolyte membranes. To increase the hydrolytic and oxidative stabilities of sulfonated polyimide membranes,
atriamine crosslinker, 4-(4-aminophenoxy)benzene-1,3-diamine, was synthesized, characterized, and successfully used to
synthesize covalently cross-linked sulfonated polyimide membranes. 1,4,5,8-Naphthalenetetracarboxylic dianhydride,
2,2’-benzidine-disulfonic acid, 4-(4-aminophenoxy)benzene-1,3-diamine and 2-bis(4-(4-aminophenoxy)phenyl)
hexafluoropropane-based cross-linked sulfonated polyimide membranes have been synthesized and compared with linear
sulfonated polyimide membrane in terms of various fuel cell application parameters. Covalent cross-linking is a simple and
efficient method to increase the lifetime of the polyelectrolyte membranes. The covalently cross-linked sulfonated
polyimidemembranes show an ion exchange capacity of 1.426 1.441 meq.g-1, proton conduction of 0.026 – 0.031 S cm-1, and
water uptake capacity 10.7 – 17.07%. As the triamine concentration is increases, both hydrolytic and oxidative stabilities of the
membranes also increased. The linear sulfonated polyimide showed hydrolytic stability of 43 h, whereas hydrolytic stability of
the cross-linked sulfonated polyimide membranes is increased up to 70 h.
 
Date 2021-12-24T06:01:03Z
2021-12-24T06:01:03Z
2021-09
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscair.res.in/handle/123456789/58695
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.28(5) [September 2021]