Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes

Ke Shao; Jing Zhu; Chengji Zhao; Xianfeng Li; Zhiming Cui; Yang Zhang; Hongtao Li; Dan Xu; Gang Zhang; Tiezhu Fu; Wu Jing; Hui Na; Wei Xing

doi:10.1002/pola.23621

Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes

Ke Shao, Jing Zhu, Chengji Zhao, Xianfeng Li, Zhiming Cui, Yang Zhang, Hongtao Li, Dan Xu, Gang Zhang, Tiezhu Fu, Wu Jing, Hui Na, Wei Xing

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

65 Scopus citations

Abstract

A new monomer 1,5-bis(4-fluorobenzoyl)-2,6-dimethoxynaphthalene (DMNF) was prepared and further polymerized to form naphthalene-based poly(arylene ether ketone) copolymers containing methoxy groups (MNPAEKs). The side-chain-type sulfonated naphthalene-based poly(arylene ether ketone) copolymers (SNPAEKs) were obtained by demethylation and sulfobutylation. Flexible and tough membranes with reasonably high mechanical strength were prepared. The SNPAEKs membrane showed anisotropic membrane swelling with larger swelling in thickness than in plane. Transmission electron microscopy (TEM) analysis revealed clear nanophase separated structure of SNPAEKs membranes, which composed of hydrophilic side chain and hydrophobic main-chain domains. Proton conductivities of copolymers increased gradually with increase in temperature. The highest conductivity of 0.179 S/cm was obtained for SNPAEK-80 (IEC = 1.82 mequiv/g) at 80°C, which is higher than that of Nafion117 (0.146 S/cm). The SNPAEKs membranes exhibit the methanol permeability in the range of 3.42 × 10^-8 - 4.49 × 10^-7 cm²/s, which are much lower than that of Nafion117. They could be the promising materials as alternative to Nafion membrane for direct methanol fuel cells applications.

Original language	English (US)
Pages (from-to)	5772-5783
Number of pages	12
Journal	Journal of Polymer Science, Part A: Polymer Chemistry
Volume	47
Issue number	21
DOIs	https://doi.org/10.1002/pola.23621
State	Published - Nov 1 2009

All Science Journal Classification (ASJC) codes

Polymers and Plastics
Organic Chemistry
Materials Chemistry

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title = "Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes",

abstract = "A new monomer 1,5-bis(4-fluorobenzoyl)-2,6-dimethoxynaphthalene (DMNF) was prepared and further polymerized to form naphthalene-based poly(arylene ether ketone) copolymers containing methoxy groups (MNPAEKs). The side-chain-type sulfonated naphthalene-based poly(arylene ether ketone) copolymers (SNPAEKs) were obtained by demethylation and sulfobutylation. Flexible and tough membranes with reasonably high mechanical strength were prepared. The SNPAEKs membrane showed anisotropic membrane swelling with larger swelling in thickness than in plane. Transmission electron microscopy (TEM) analysis revealed clear nanophase separated structure of SNPAEKs membranes, which composed of hydrophilic side chain and hydrophobic main-chain domains. Proton conductivities of copolymers increased gradually with increase in temperature. The highest conductivity of 0.179 S/cm was obtained for SNPAEK-80 (IEC = 1.82 mequiv/g) at 80°C, which is higher than that of Nafion117 (0.146 S/cm). The SNPAEKs membranes exhibit the methanol permeability in the range of 3.42 × 10-8 - 4.49 × 10-7 cm2/s, which are much lower than that of Nafion117. They could be the promising materials as alternative to Nafion membrane for direct methanol fuel cells applications.",

author = "Ke Shao and Jing Zhu and Chengji Zhao and Xianfeng Li and Zhiming Cui and Yang Zhang and Hongtao Li and Dan Xu and Gang Zhang and Tiezhu Fu and Wu Jing and Hui Na and Wei Xing",

year = "2009",

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T1 - Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes

AU - Shao, Ke

AU - Zhu, Jing

AU - Zhao, Chengji

AU - Li, Xianfeng

AU - Cui, Zhiming

AU - Zhang, Yang

AU - Li, Hongtao

AU - Xu, Dan

AU - Zhang, Gang

AU - Fu, Tiezhu

AU - Jing, Wu

AU - Na, Hui

AU - Xing, Wei

PY - 2009/11/1

Y1 - 2009/11/1

N2 - A new monomer 1,5-bis(4-fluorobenzoyl)-2,6-dimethoxynaphthalene (DMNF) was prepared and further polymerized to form naphthalene-based poly(arylene ether ketone) copolymers containing methoxy groups (MNPAEKs). The side-chain-type sulfonated naphthalene-based poly(arylene ether ketone) copolymers (SNPAEKs) were obtained by demethylation and sulfobutylation. Flexible and tough membranes with reasonably high mechanical strength were prepared. The SNPAEKs membrane showed anisotropic membrane swelling with larger swelling in thickness than in plane. Transmission electron microscopy (TEM) analysis revealed clear nanophase separated structure of SNPAEKs membranes, which composed of hydrophilic side chain and hydrophobic main-chain domains. Proton conductivities of copolymers increased gradually with increase in temperature. The highest conductivity of 0.179 S/cm was obtained for SNPAEK-80 (IEC = 1.82 mequiv/g) at 80°C, which is higher than that of Nafion117 (0.146 S/cm). The SNPAEKs membranes exhibit the methanol permeability in the range of 3.42 × 10-8 - 4.49 × 10-7 cm2/s, which are much lower than that of Nafion117. They could be the promising materials as alternative to Nafion membrane for direct methanol fuel cells applications.

AB - A new monomer 1,5-bis(4-fluorobenzoyl)-2,6-dimethoxynaphthalene (DMNF) was prepared and further polymerized to form naphthalene-based poly(arylene ether ketone) copolymers containing methoxy groups (MNPAEKs). The side-chain-type sulfonated naphthalene-based poly(arylene ether ketone) copolymers (SNPAEKs) were obtained by demethylation and sulfobutylation. Flexible and tough membranes with reasonably high mechanical strength were prepared. The SNPAEKs membrane showed anisotropic membrane swelling with larger swelling in thickness than in plane. Transmission electron microscopy (TEM) analysis revealed clear nanophase separated structure of SNPAEKs membranes, which composed of hydrophilic side chain and hydrophobic main-chain domains. Proton conductivities of copolymers increased gradually with increase in temperature. The highest conductivity of 0.179 S/cm was obtained for SNPAEK-80 (IEC = 1.82 mequiv/g) at 80°C, which is higher than that of Nafion117 (0.146 S/cm). The SNPAEKs membranes exhibit the methanol permeability in the range of 3.42 × 10-8 - 4.49 × 10-7 cm2/s, which are much lower than that of Nafion117. They could be the promising materials as alternative to Nafion membrane for direct methanol fuel cells applications.

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ER -

Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes

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