Sulfonation of cPTFE Film grafted Styrene for Proton Exchange Membrane Fuel Cell

Authors

Yohan Yohan, Departemen Metalurgi dan Material, Fakultas Teknik, Universitas Indonesia, Depok 16424, Indonesia Fakultas Perikanan dan Kelautan, Universitas Satya Negara Indonesia, Jakarta 12240, IndonesiaFollow

Abstract

Sulfonation of cPTFE Film grafted Styrene for Proton Exchange Membrane Fuel Cell. Sulfonation of γ-ray iradiated and styrene-grafted crosslinked polytetrafluoroethylene film (cPTFE-g-S film) have been done. The aim of the research is to make hydropyl membrane as proton exchange membrane fuel cell. Sulfonation was prepared with chlorosulfonic acid in chloroethane under various conditions. The impact of the percent of grafting, the concentration of chlorosulfonic acid, the reaction time,and the reaction temperature on the properties of sulfonated film is examinated. The results show that sulfonation of surface-grafted films is incomplete at room temperature. The increasing of concentration of chlorosulfonic acid and reaction temperature accelerates the reaction but they also add favor side reactions. These will lead to decreasing of the ion-exchange capacity, water uptake, and proton conductivity but increasing the resistance to oxidation in a perhidrol solution. The cPTFE-g-SS membrane which is resulted has stability in a H2O2 30% solution for 20 hours.

Bahasa Abstract

Telah dilakukan proses sulfonasi pada politetrafluoroetilena berikatan silang yang teriradiasi sinar-γ dan tercangkok monomer stirena (film cPTFE-g-S). Penelitian bertujuan untuk membuat bahan membran hidrofil yang dapat berperan sebagai membran penukar proton pada sel bahan bakar jenis PEMFC. Sulfonasi dilakukan dengan asam klorosulfonat dalam pelarut dikloroetana pada berbagai kondisi. Pengaruh persen pencangkokan, konsentrasi asam klorosulfonat, waktu dan suhu reaksi terhadap sifat-sifat film tersulfonasi diuji. Hasil penelitian menunjukkan bahwa proses sulfonasi yang dilakukan pada suhu kamar tidak memberikan hasil yang sempurna. Peningkatan konsentrasi ClSO3H dan suhu reaksi mempercepat terjadinya proses sulfonasi namun juga menambah jumlah reaksi samping. Akibatnya kapasitas penukaran ion, pengikatan air, dan konduktivitas proton film menjadi semakin berkurang namun ketahanan oksidasi pada larutan perhidrol menjadi semakin bertambah. Membran cPTFE-g-SS yang dihasilkan mempunyai kestabilan dalam larutan H2O2 30% volume selama 20 jam.

References

1. M. C. William, Fuel cell Handbook, Fifth Edition, US Department of Energy, Morgantown, West Virginia, 2000, 352 pp.
2. A. Charlesby, Atomic Radiation and Polymers, Pergamon Press, London, 1960, 556 pp.
3. A. Oshima, S. Ikeda, E. Katoh, Y. Tabata, Radiat. Phys. Chem. 62 (2001) 39-45.
4. Yohan, R.M. Nur, L. Hendrajaya, E.S. Siradj, J.Teknologi 19 [4] (2005) 318-326.
5. M. Shen, S. Roy, J. W. Kuhlmann, K. Scott, K.Lovell, J. A. Horsfall, J. Membr. Sci. 251 (2005) 121–130.
6. N. Walsby, M. Paronen, J. Juhanoja, J. Sundholm, J. Appl. Polym. Sci. 81 (2001) 1572-1580.
7. J. Chen, M. Asano, Y. Maekawa, M. Yoshida, J. Membr. Sci. 271 (2006) 249-257.
8. M. P. Van Albada, H. Cerfontain, J. Chem. Soc. Perkin II 12 (1977) 1548.
9. M. M. Nasef, E. A. Hegazy, Prog. in Polym. Sci. 29 (2004) 499-561.
10. F. N. Buchi, B. Gupta, O. Haas, G. G. Scherer, Electrochim Acta 40 (1995) 345.
11. R.A. Assink, C. A. Arnold, R. P. Hollandsworth, J. Membr. Sci. 56 (1991) 143.
12. R. B. Hogdon, J. Polym. Sci. Part A Polym Chem. 6 (1968) 171.
13. A. G. Guzman-Gracia, P. N. Pintauro, M. W. Verbrugge, E.W. Scheneider, J. Appl. Electrochem 22 (1992) 204.

Recommended Citation

Yohan, Yohan (2007) "Sulfonation of cPTFE Film grafted Styrene for Proton Exchange Membrane Fuel Cell," Makara Journal of Technology: Vol. 11: Iss. 1, Article 7.
DOI: 10.7454/mst.v11i1.441
Available at: https://scholarhub.ui.ac.id/mjt/vol11/iss1/7