Anhydrous proton conducting membranes based on crosslinked graft copolymer electrolytes

Yong Woo Kim, Jung Tae Park, Joo Hwan Koh, Dong Kyu Roh, Jong Hak Kim

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

A comb-like copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(hydroxy ethyl acrylate) side chains, i.e. P(VDF-co-CTFE)-g-PHEA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and a microphase-separated structure of the copolymer were confirmed by proton nuclear magnetic resonance (1H NMR), FT-IR spectroscopy, and transmission electron microscopy (TEM). This comb-like polymer was crosslinked with 4,5-imidazole dicarboxylic acid (IDA) via the esterification of the -OH groups of PHEA and the -COOH groups of IDA. Upon doping with phosphoric acid (H3PO4) to form imidazole-H3PO4 complexes, the proton conductivity of the membranes continuously increased with increasing H3PO4 content. A maximum proton conductivity of 0.015 S/cm was achieved at 120 °C under anhydrous conditions. In addition, these P(VDF-co-CTFE)-g-PHEA/IDA/H3PO4 membranes exhibited good mechanical properties (765 MPa of Young's modulus), and high thermal stability up to 250 °C, as determined by a universal testing machine (UTM) and thermal gravimetric analysis (TGA), respectively.

Original languageEnglish
Pages (from-to)319-325
Number of pages7
JournalJournal of Membrane Science
Volume325
Issue number1
DOIs
Publication statusPublished - 2008 Nov 15

Fingerprint

Graft copolymers
imidazoles
Dicarboxylic Acids
Electrolytes
Protons
dicarboxylic acids
copolymers
Proton conductivity
electrolytes
membranes
Membranes
Transplants
conduction
Comb and Wattles
protons
Acids
Copolymers
Nuclear magnetic resonance
Infrared transmission
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Kim, Yong Woo ; Park, Jung Tae ; Koh, Joo Hwan ; Roh, Dong Kyu ; Kim, Jong Hak. / Anhydrous proton conducting membranes based on crosslinked graft copolymer electrolytes. In: Journal of Membrane Science. 2008 ; Vol. 325, No. 1. pp. 319-325.
@article{2d5790ec40cc40e29374d283a6c85895,
title = "Anhydrous proton conducting membranes based on crosslinked graft copolymer electrolytes",
abstract = "A comb-like copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(hydroxy ethyl acrylate) side chains, i.e. P(VDF-co-CTFE)-g-PHEA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and a microphase-separated structure of the copolymer were confirmed by proton nuclear magnetic resonance (1H NMR), FT-IR spectroscopy, and transmission electron microscopy (TEM). This comb-like polymer was crosslinked with 4,5-imidazole dicarboxylic acid (IDA) via the esterification of the -OH groups of PHEA and the -COOH groups of IDA. Upon doping with phosphoric acid (H3PO4) to form imidazole-H3PO4 complexes, the proton conductivity of the membranes continuously increased with increasing H3PO4 content. A maximum proton conductivity of 0.015 S/cm was achieved at 120 °C under anhydrous conditions. In addition, these P(VDF-co-CTFE)-g-PHEA/IDA/H3PO4 membranes exhibited good mechanical properties (765 MPa of Young's modulus), and high thermal stability up to 250 °C, as determined by a universal testing machine (UTM) and thermal gravimetric analysis (TGA), respectively.",
author = "Kim, {Yong Woo} and Park, {Jung Tae} and Koh, {Joo Hwan} and Roh, {Dong Kyu} and Kim, {Jong Hak}",
year = "2008",
month = "11",
day = "15",
doi = "10.1016/j.memsci.2008.07.043",
language = "English",
volume = "325",
pages = "319--325",
journal = "Journal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",
number = "1",

}

Anhydrous proton conducting membranes based on crosslinked graft copolymer electrolytes. / Kim, Yong Woo; Park, Jung Tae; Koh, Joo Hwan; Roh, Dong Kyu; Kim, Jong Hak.

In: Journal of Membrane Science, Vol. 325, No. 1, 15.11.2008, p. 319-325.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Anhydrous proton conducting membranes based on crosslinked graft copolymer electrolytes

AU - Kim, Yong Woo

AU - Park, Jung Tae

AU - Koh, Joo Hwan

AU - Roh, Dong Kyu

AU - Kim, Jong Hak

PY - 2008/11/15

Y1 - 2008/11/15

N2 - A comb-like copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(hydroxy ethyl acrylate) side chains, i.e. P(VDF-co-CTFE)-g-PHEA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and a microphase-separated structure of the copolymer were confirmed by proton nuclear magnetic resonance (1H NMR), FT-IR spectroscopy, and transmission electron microscopy (TEM). This comb-like polymer was crosslinked with 4,5-imidazole dicarboxylic acid (IDA) via the esterification of the -OH groups of PHEA and the -COOH groups of IDA. Upon doping with phosphoric acid (H3PO4) to form imidazole-H3PO4 complexes, the proton conductivity of the membranes continuously increased with increasing H3PO4 content. A maximum proton conductivity of 0.015 S/cm was achieved at 120 °C under anhydrous conditions. In addition, these P(VDF-co-CTFE)-g-PHEA/IDA/H3PO4 membranes exhibited good mechanical properties (765 MPa of Young's modulus), and high thermal stability up to 250 °C, as determined by a universal testing machine (UTM) and thermal gravimetric analysis (TGA), respectively.

AB - A comb-like copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(hydroxy ethyl acrylate) side chains, i.e. P(VDF-co-CTFE)-g-PHEA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and a microphase-separated structure of the copolymer were confirmed by proton nuclear magnetic resonance (1H NMR), FT-IR spectroscopy, and transmission electron microscopy (TEM). This comb-like polymer was crosslinked with 4,5-imidazole dicarboxylic acid (IDA) via the esterification of the -OH groups of PHEA and the -COOH groups of IDA. Upon doping with phosphoric acid (H3PO4) to form imidazole-H3PO4 complexes, the proton conductivity of the membranes continuously increased with increasing H3PO4 content. A maximum proton conductivity of 0.015 S/cm was achieved at 120 °C under anhydrous conditions. In addition, these P(VDF-co-CTFE)-g-PHEA/IDA/H3PO4 membranes exhibited good mechanical properties (765 MPa of Young's modulus), and high thermal stability up to 250 °C, as determined by a universal testing machine (UTM) and thermal gravimetric analysis (TGA), respectively.

UR - http://www.scopus.com/inward/record.url?scp=53249090067&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=53249090067&partnerID=8YFLogxK

U2 - 10.1016/j.memsci.2008.07.043

DO - 10.1016/j.memsci.2008.07.043

M3 - Article

AN - SCOPUS:53249090067

VL - 325

SP - 319

EP - 325

JO - Journal of Membrane Science

JF - Journal of Membrane Science

SN - 0376-7388

IS - 1

ER -