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

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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).