Title

Water Uptake And Conductivity Of Cross-Linked Speek Membranes

Abstract

Water uptake is an important attribute of all membrane electrolytes, as it is related to mechanical strength, creep, and dimensional stability. Thus some means of controlling water uptake by a hydrophilic sulfonic acid polymer is desirable. This is particularly important for SPEEK, which at high degrees of sulfonation (i.e., low equivalent weight) has demonstrated substantial water uptake, on order of 10's of water molecules per sulfonic acid unit. We have attempted to control water uptake in SPEEK membranes by performing cross-linking reactions on the finished polymer. Water-soluble SPEEK (85% degree of sulfonation, or 418 g/eq EW), 1,4-benzenedimethanol, and various transition metal chloride catalysts were cast together to form a membrane that was heated at 200 °C for 10 min. The resulting insoluble membrane was shown to have conductivity comparable to an uncross-linked SPEEK membrane over a range of relative humidities. © The Electrochemical Society.

Publication Date

1-1-2009

Publication Title

ECS Transactions

Volume

16

Issue

2 PART 1

Number of Pages

705-710

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1149/1.2981906

Socpus ID

63149133118 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/63149133118

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