Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic PVDF copolymer

Dong Kyu Roh, Sung Hoon Ahn, Jin Ah Seo, Yong Gun Shul, Jong Hak Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel graft copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly (glycidyl methacrylate) side chains, that is, P(VDF-co-CTFE)-g- PGMA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and microphase-separated structure of the polymer were confirmed by 1H NMR, FTIR spectroscopy, and TEM. Assynthesized P(VDF-co-CTFE)-g-PGMA copolymer was sulfonated by sodium bisulfate, followed by thermal crosslinking with sulfosuccinic acid (SA) via the esterification to produce grafted/crosslinked polymer electrolyte membranes. The IEC values continuously increased with increasing SA content but water uptake increased with SA content up to 10 wt %, above which it decreased again as a result of competitive effect between crosslinking and hydrophilicity of membranes. At 20 wt % of SA content, the proton conductivity reached 0.057 and 0.11 S/cm at 20 and 80 ° C, respectively. The grafted/crosslinked P(VDF-co-CTFE)- g-PGMA/SA membranes exhibited good mechanical properties (>400 MPa of Young's modulus) and high thermal stability (up to 300 ° C), as determined by a universal testing machine (UTM) and TGA.

Original languageEnglish
Title of host publication20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010
Pages449-457
Number of pages9
Publication statusPublished - 2010 Dec 1
Event20th Annual Meeting of the North American Membrane Society 2010, NAMS 2010 and 11th International Conference on Inorganic Membranes 2010, ICIM 2010 - Washington, DC, United States
Duration: 2010 Jul 172010 Jul 22

Publication series

Name20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010

Other

Other20th Annual Meeting of the North American Membrane Society 2010, NAMS 2010 and 11th International Conference on Inorganic Membranes 2010, ICIM 2010
CountryUnited States
CityWashington, DC
Period10/7/1710/7/22

Fingerprint

Protons
Copolymers
Membranes
Acids
Crosslinking
Polymers
Proton conductivity
Atom transfer radical polymerization
Graft copolymers
Hydrophilicity
Esterification
Water content
Electrolytes
Nuclear magnetic resonance spectroscopy
Thermodynamic stability
Elastic moduli
Sodium
thiosuccinic acid
polyvinylidene fluoride
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Filtration and Separation

Cite this

Roh, D. K., Ahn, S. H., Seo, J. A., Shul, Y. G., & Kim, J. H. (2010). Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic PVDF copolymer. In 20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010 (pp. 449-457). (20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010).
Roh, Dong Kyu ; Ahn, Sung Hoon ; Seo, Jin Ah ; Shul, Yong Gun ; Kim, Jong Hak. / Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic PVDF copolymer. 20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010. 2010. pp. 449-457 (20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010).
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abstract = "A novel graft copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly (glycidyl methacrylate) side chains, that is, P(VDF-co-CTFE)-g- PGMA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and microphase-separated structure of the polymer were confirmed by 1H NMR, FTIR spectroscopy, and TEM. Assynthesized P(VDF-co-CTFE)-g-PGMA copolymer was sulfonated by sodium bisulfate, followed by thermal crosslinking with sulfosuccinic acid (SA) via the esterification to produce grafted/crosslinked polymer electrolyte membranes. The IEC values continuously increased with increasing SA content but water uptake increased with SA content up to 10 wt {\%}, above which it decreased again as a result of competitive effect between crosslinking and hydrophilicity of membranes. At 20 wt {\%} of SA content, the proton conductivity reached 0.057 and 0.11 S/cm at 20 and 80 ° C, respectively. The grafted/crosslinked P(VDF-co-CTFE)- g-PGMA/SA membranes exhibited good mechanical properties (>400 MPa of Young's modulus) and high thermal stability (up to 300 ° C), as determined by a universal testing machine (UTM) and TGA.",
author = "Roh, {Dong Kyu} and Ahn, {Sung Hoon} and Seo, {Jin Ah} and Shul, {Yong Gun} and Kim, {Jong Hak}",
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Roh, DK, Ahn, SH, Seo, JA, Shul, YG & Kim, JH 2010, Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic PVDF copolymer. in 20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010. 20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010, pp. 449-457, 20th Annual Meeting of the North American Membrane Society 2010, NAMS 2010 and 11th International Conference on Inorganic Membranes 2010, ICIM 2010, Washington, DC, United States, 10/7/17.

Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic PVDF copolymer. / Roh, Dong Kyu; Ahn, Sung Hoon; Seo, Jin Ah; Shul, Yong Gun; Kim, Jong Hak.

20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010. 2010. p. 449-457 (20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic PVDF copolymer

AU - Roh, Dong Kyu

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AU - Seo, Jin Ah

AU - Shul, Yong Gun

AU - Kim, Jong Hak

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N2 - A novel graft copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly (glycidyl methacrylate) side chains, that is, P(VDF-co-CTFE)-g- PGMA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and microphase-separated structure of the polymer were confirmed by 1H NMR, FTIR spectroscopy, and TEM. Assynthesized P(VDF-co-CTFE)-g-PGMA copolymer was sulfonated by sodium bisulfate, followed by thermal crosslinking with sulfosuccinic acid (SA) via the esterification to produce grafted/crosslinked polymer electrolyte membranes. The IEC values continuously increased with increasing SA content but water uptake increased with SA content up to 10 wt %, above which it decreased again as a result of competitive effect between crosslinking and hydrophilicity of membranes. At 20 wt % of SA content, the proton conductivity reached 0.057 and 0.11 S/cm at 20 and 80 ° C, respectively. The grafted/crosslinked P(VDF-co-CTFE)- g-PGMA/SA membranes exhibited good mechanical properties (>400 MPa of Young's modulus) and high thermal stability (up to 300 ° C), as determined by a universal testing machine (UTM) and TGA.

AB - A novel graft copolymer consisting of a poly(vinylidene fluoride-co-chlorotrifluoroethylene) backbone and poly (glycidyl methacrylate) side chains, that is, P(VDF-co-CTFE)-g- PGMA, was synthesized through atom transfer radical polymerization (ATRP) using CTFE units as a macroinitiator. Successful synthesis and microphase-separated structure of the polymer were confirmed by 1H NMR, FTIR spectroscopy, and TEM. Assynthesized P(VDF-co-CTFE)-g-PGMA copolymer was sulfonated by sodium bisulfate, followed by thermal crosslinking with sulfosuccinic acid (SA) via the esterification to produce grafted/crosslinked polymer electrolyte membranes. The IEC values continuously increased with increasing SA content but water uptake increased with SA content up to 10 wt %, above which it decreased again as a result of competitive effect between crosslinking and hydrophilicity of membranes. At 20 wt % of SA content, the proton conductivity reached 0.057 and 0.11 S/cm at 20 and 80 ° C, respectively. The grafted/crosslinked P(VDF-co-CTFE)- g-PGMA/SA membranes exhibited good mechanical properties (>400 MPa of Young's modulus) and high thermal stability (up to 300 ° C), as determined by a universal testing machine (UTM) and TGA.

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M3 - Conference contribution

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Roh DK, Ahn SH, Seo JA, Shul YG, Kim JH. Synthesis and characterization of grafted/crosslinked proton conducting membranes based on amphiphilic PVDF copolymer. In 20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010. 2010. p. 449-457. (20th Annual Meeting of the North American Membrane Society and 11th International Conference on Inorganic Membranes 2010, NAMS/ICIM 2010).