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All Journal E-Journal Widya Kesehatan dan Lingkungan Chimica et Natura Acta Makara Journal of Technology
Yohan Yohan
The State Ministry of Research and Technology, Gedung II BPPT Lt. 8 – Jl. M.H. Thamrin 8 Jakarta 10340 Faculty of Fishery – University of Satya Negara Indonesia, Jl. Arteri Pondok Indah No. 11 Jakarta 12240
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Public Health

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Journal : Makara Journal of Technology

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Synthesis of Fuel Cell Membrane: Copolymerization of Styrene on ETFE Film by Grafted pre-Irradiation Yohan, Yohan; Nur, Rifai M.; Hendrajaya, Lilik; Siradj, E. S.
Makara Journal of Technology Vol. 9, No. 2
Publisher : UI Scholars Hub

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Synthesis of Fuel Cell Membrane: Copolymerization of Styrene on ETFE Film by Grafted pre-Irradiation. Preirradiation Grafting styrene monomer on ETFE film has been prepared. Research has been performed by γ-ray radiation at various total dose from 2.5 – 12.5 kGy and various dose rate from 1.3 – 1.9 kGy/hour. Irradiated copolymer is then grafted by styrene monomer in various solvent: ethanol, 2-propanol, and toluene, various concentration from 20 – 70% volume, various temperature from 50 – 90oC, and various grafting time from 2 – 12 hours. The results showed that percent of grafting is increase with increase of total dose and decrease of rate dose. The optimum experiment conditions are obtained at total dose 10 kGy, dose rate 1,9 kGy/hour, 2-propanol solvent, 40% volume styrene, 4 hours grafting time, and 70oC grafting temperature.
Sulfonation of cPTFE Film grafted Styrene for Proton Exchange Membrane Fuel Cell Yohan, Yohan
Makara Journal of Technology Vol. 11, No. 1
Publisher : UI Scholars Hub

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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.
Co-Authors E. S. Siradj E. S. Siraj Lilik Hendrajaya Lubis, Rubianto A. Nur, Rifai M. Nurmalasari, Ratna Rifaid M. Nur Rifaid Nur, Rifaid Shabarni Gaffar -, Shabarni Gaffar Yeni Wahyuni Hartati