Synthesis and fuel cell characterization of blend membranes from phenyl phosphine oxide containing flourinated novel polymers | Health & Environmental Research Online (HERO)

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Citation
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HERO ID

2944396

Reference Type

Journal Article

Title

Synthesis and fuel cell characterization of blend membranes from phenyl phosphine oxide containing flourinated novel polymers

Author(s)

Seden, MG; Basturk, E; Inan, TY; Apohan, NK; Gungor, A

Year

2014

Is Peer Reviewed?

Yes

Journal

Journal of Power Sources
ISSN: 0378-7753

Volume

271

Page Numbers

465-479

Language

English

DOI

10.1016/j.jpowsour.2014.08.032

Web of Science Id

WOS:000343391600061

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84906837135&doi=10.1016%2fj.jpowsour.2014.08.032&partnerID=40&md5=297aaf3844ebe9c3e7f4499e84210d21
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Abstract

Novel fluorinated poly(arylene ether)'s are synthesized from polycondensation of bis (p-hydroxy-tetrafluoro) phenyl) phenyl phosphine oxide (PFPPO-OH) with 4,4'-dichlorodiphenyl sulfone (DCDPS) and 2,2-bis(4-hydroxyphenyl)propane (Bisfenol A) (Copolymer 1a) or 2,2-bis(4-hydroxyphenyl) hexafluoropropane (Bisphenol AF) (Copolymer lb). The fluorinated copolymers have been blended with sulphonated poly(ether ether ketone)-SPEEK by solvent casting method. The water uptake and proton conductivity of the blend membranes decreases with the increase of copolymer content as expected, but proton conductivity values are still comparable to that of Nafion117 (R) membrane. Addition of hydrophobic copolymer lb to the SPEEK caused increase in water vapor transmission. Methanol permeability of the membranes is decreased to 8.2 x 10(-8) cm(2) s(-1) and 1.3 x 10(-8) cm(2) s(-1) by addition of Copolymer la and lb, respectively and they are much lower than that of Nafion (R) 117 (1.21E-06 (cm(2) s(-1)). The blend membranes endure up to 6.5 h before it starts to dissolve. Hydrogen and oxygen permeability of the blend membranes is one-hundredth of the Nafion (R). Fluorinated polymer improved chemical, mechanical, and hydrolytic stability and also phenyl phosphine oxide structure in the ionomer increased the thermal stability, gas and methanol permeability and overcomed the drawbacks of the Naflon (R) type membranes. (C) 2014 Elsevier B.V. All rights reserved.

Keywords

Poly(arylene ether); Direct methanol fuel cell; Proton conductive membrane; Proton conductivity