✦ LIBER ✦

Synthesis and Evaluation of Novel Proton Exchange Membranes Containing the Semisquaric Acid Group

✍ Scribed by Ken Yoshimura; Lanny S. Liebeskind

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 270 KB
Volume: 31
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.201000223

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✦ Synopsis

Abstract

We focus our attention here on semisquaric acid, which is known to show high acidity, as a new proton dissociating group for proton exchange membranes (PEMs). The introduction of a squaric acid group into aromatic polymers was conducted by the reaction of lithiated aromatic polymers and diisopropoxy squarate, followed by treatment with hydrochloric acid. A resulting polyphenylsulfone membrane with the squaric acid group introduced (PPSf‐SQ, IEC = 4.1 meq·g^−1^) showed proton conductivity of 1.0 × 10^−1^ S·cm^−1^ at 80 °C under 95% relative humidity, which indicates that the semisquaric acid has the potential to become an alternative proton‐conducting group for PEMs.

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