Proton conducting poly(vinylidene fluoride-co-chlorotrifluoroethylene) graft copolymer electrolyte membranes

Yong Woo Kim, Jin Kyu Choi, Jung Tae Park, Jong Hak Kim

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

A series of proton conducting comb copolymer membranes consisting of poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(styrene sulfonic acid) (PSSA) side chains, i.e. P(VDF-co-CTFE)-g-PSSA were synthesized using atom transfer radical polymerization (ATRP). 1H NMR, FT-IR spectroscopy, wide angle X-ray scattering (WAXS) and transmission electron microscopy (TEM) results present the successful "grafting from" method using ATRP and the well-defined microphase-separated structure of the polymer electrolyte membranes. All the properties of ion exchange capacity (IEC), water uptake and proton conductivity for the membranes continuously increased with increasing PSSA contents. The results of thermal gravimetric analysis (TGA) also showed that all the membranes were stable up to 300 °C. After terminated chlorine atoms were converted to end-functional azide groups (P(VDF-co-CTFE)-g-PSSA-N3), the polymer electrolyte membranes were crosslinked under UV irradiation. The crosslinked P(VDF-co-CTFE)-g-PSSA membrane with 73 wt.% of PSSA content exhibited the reduced water uptake from 300 to 83%, the increased tensile strength from 21.1 to 26.2 MPa and the slightly reduced proton conductivity from 0.074 to 0.068 S/cm at room temperature compared to the uncrosslinked membrane.

Original languageEnglish
Pages (from-to)315-322
Number of pages8
JournalJournal of Membrane Science
Volume313
Issue number1-2
DOIs
Publication statusPublished - 2008 Apr 10

Fingerprint

Graft copolymers
vinylidene
Styrene
Sulfonic Acids
sulfonic acid
Electrolytes
fluorides
Protons
copolymers
electrolytes
polystyrene
membranes
Membranes
Transplants
conduction
protons
Acids
Proton conductivity
Atom transfer radical polymerization
Polymerization

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Proton conducting poly(vinylidene fluoride-co-chlorotrifluoroethylene) graft copolymer electrolyte membranes",
abstract = "A series of proton conducting comb copolymer membranes consisting of poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly(styrene sulfonic acid) (PSSA) side chains, i.e. P(VDF-co-CTFE)-g-PSSA were synthesized using atom transfer radical polymerization (ATRP). 1H NMR, FT-IR spectroscopy, wide angle X-ray scattering (WAXS) and transmission electron microscopy (TEM) results present the successful {"}grafting from{"} method using ATRP and the well-defined microphase-separated structure of the polymer electrolyte membranes. All the properties of ion exchange capacity (IEC), water uptake and proton conductivity for the membranes continuously increased with increasing PSSA contents. The results of thermal gravimetric analysis (TGA) also showed that all the membranes were stable up to 300 °C. After terminated chlorine atoms were converted to end-functional azide groups (P(VDF-co-CTFE)-g-PSSA-N3), the polymer electrolyte membranes were crosslinked under UV irradiation. The crosslinked P(VDF-co-CTFE)-g-PSSA membrane with 73 wt.{\%} of PSSA content exhibited the reduced water uptake from 300 to 83{\%}, the increased tensile strength from 21.1 to 26.2 MPa and the slightly reduced proton conductivity from 0.074 to 0.068 S/cm at room temperature compared to the uncrosslinked membrane.",
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Proton conducting poly(vinylidene fluoride-co-chlorotrifluoroethylene) graft copolymer electrolyte membranes. / Kim, Yong Woo; Choi, Jin Kyu; Park, Jung Tae; Kim, Jong Hak.

In: Journal of Membrane Science, Vol. 313, No. 1-2, 10.04.2008, p. 315-322.

Research output: Contribution to journalArticle

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