Synthesis and characterization of poly(ether sulfone) grafted poly(styrene sulfonic acid) for proton conducting membranes

Yoon Taik Goh; Rajkumar Patel; Se Jun Im; Jong Hak Kim; Byoung Ryul Min

Korean Journal of Chemical Engineering, Vol.26, No.2, 518-522, March, 2009

DOI10.1007/s11814-009-0088-8 Export Citation

Synthesis and characterization of poly(ether sulfone) grafted poly(styrene sulfonic acid) for proton conducting membranes

Yoon Taik Goh, Rajkumar Patel, Se Jun Im, Jong Hak Kim , and Byoung Ryul Min^†

Department of Chemical Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea

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Two-step synthesis of proton-conducting poly(ether sulfone) (PES) graft copolymer electrolyte membrane is proposed. Fridel Craft alkylation reaction was used to introduce chloromethyl pendant group onto the PES polymer backbone. Later on, atom transfer radical polymerization (ATRP) was applied to synthesize a series of poly(ether sulfone) grafted poly(styrene sulfonic acid) (PES-g-PSSA). Successful chloromethyl substitution and grafting of the pendant group was characterized by the 1H-NMR and elemental analysis. Electrochemical properties such as ion exchange capacity (IEC), water uptake and proton conductivity increased with increasing PSSA contents. Thermal gravimetric analysis (TGA) showed the thermal stability of membranes up to 270 ℃. Proton conductivity for maximum amount of grafting was 0.00297 S/cm.

Keywords:Polymer Electrolyte Membrane;Proton Conductivity;Atom Transfer Radical Polymerization;Fuel Cell

[References]

Chiu CY, Hsu WH, Yen YJ, Kuo SW, Chang FC, Macromolecules, 38(15), 6640 (2005)
Kim JH, Kang MS, Kim YJ, Won J, Park NG, Kang YS, Chem. Commun., 14, 1662 (2004)
Kim JH, Min BR, Won J, Joo SH, Kim HS, Kang YS, Macromolecules, 36(16), 6183 (2003)
Smitha B, Sridhar S, Khan AA, J. Membr. Sci., 225(1-2), 63 (2003)
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Di Vona ML, Ahmed Z, Bellitto S, Lenci A, Traversa E, Licoccia S, J. Membr. Sci., 296(1-2), 156 (2007)
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Ishikawa K, Kaneko K, Takeoka Y, Rikukawa M, Sanui K, Ito I, Kanzaki Y, Syn. Met., 135, 71 (2003)
Bae JM, Honma I, Murata M, Yamamoto T, Rikukawa M, Ogata N, Solid State Ion., 147(1-2), 189 (2002)
Neburchilov V, Martin J, Wang HJ, Zhang JJ, J. Power Sources, 169(2), 221 (2007)
Ramani V, Kunz HR, Fenton JM, J. Membr. Sci., 266(1-2), 110 (2005)
Sambandam S, Ramani V, J. Power Sources, 170(2), 259 (2007)
Xing PX, Robertson GP, Guiver MD, Mikhailenko SD, Kaliaguine S, J. Polym. Sci. A: Polym. Chem., 42(12), 2866 (2004)
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Ueda M, Toyota H, Ochi T, Sugiyama J, Yonetaka K, Masuko T, Teramoto T, J. Polym. Sci., Polym. Chem. Ed., 31, 85 (1993)
Wang F, Ji Q, Harrison W, Mecham J, Formato R, Kovar R, Osenar P, McGrath JE, Polym. Preprints, 40, 237 (2000)
Im SJ, Patel R, Shin SJ, Kim JH, Min BR, Korean J. Chem. Eng., 25(4), 732 (2008)
Ding JF, Chuy C, Holdcroft S, Macromolecules, 35(4), 1348 (2002)
Okamura H, Takatori Y, Tsunooka M, Shirai M, Polymer, 43(11), 3155 (2002)
Iddon PD, Robinson KL, Armes SP, Polymer, 45(3), 759 (2004)
Cho CG, Jang HY, You YG, Li GH, Guk S, High Performance Polymers, 18, 579 (2006)
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Avram E, Brebu MA, Warshawsky A, Vasile C, Polymer Degradation and Stability, 69, 175 (2000)

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