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

Research output: Contribution to journalArticle

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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 languageEnglish (US)
Pages (from-to)5772-5783
Number of pages12
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume47
Issue number21
DOIs
StatePublished - Nov 1 2009

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Naphthalene
Ketones
Ether
Protons
Ethers
Ion exchange
Copolymers
Membranes
Swelling
Proton conductivity
Direct methanol fuel cells (DMFC)
Strength of materials
Methanol
naphthalene
Monomers
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Shao, Ke ; Zhu, Jing ; Zhao, Chengji ; Li, Xianfeng ; Cui, Zhiming ; Zhang, Yang ; Li, Hongtao ; Xu, Dan ; Zhang, Gang ; Fu, Tiezhu ; Jing, Wu ; Na, Hui ; Xing, Wei. / Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2009 ; Vol. 47, No. 21. pp. 5772-5783.
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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",
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Shao, K, Zhu, J, Zhao, C, Li, X, Cui, Z, Zhang, Y, Li, H, Xu, D, Zhang, G, Fu, T, Jing, W, Na, H & Xing, W 2009, 'Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes', Journal of Polymer Science, Part A: Polymer Chemistry, vol. 47, no. 21, pp. 5772-5783. https://doi.org/10.1002/pola.23621

Naphthalene-based poly(arylene ether ketone) copolymers containing sulfobutyl pendant groups for proton exchange membranes. / Shao, Ke; Zhu, Jing; Zhao, Chengji; Li, Xianfeng; Cui, Zhiming; Zhang, Yang; Li, Hongtao; Xu, Dan; Zhang, Gang; Fu, Tiezhu; Jing, Wu; Na, Hui; Xing, Wei.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 47, No. 21, 01.11.2009, p. 5772-5783.

Research output: Contribution to journalArticle

TY - JOUR

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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