%0 Journal Article
%T Preparation of Sulfonated PVA-TMSP Membranes for Direct Methanol Fuel Cell
%A Haryadi
%A Sofiatun Anisa
%A Ayu Utami
%J Makara Seri Sains
%D 2012
%I Universitas Indonesia
%X Novel preparation and characterization of sulfonated polyvinyl alcohol (PVA)每trimethoxysilyl propanethiol (TMSP) membranes for direct methanol fuel cell (DMFC) application have been investigated. Preparation of sulfonated PVA-TMSP membrane was conducted by crosslinking steps using sol-gel method and a catalyst of concentrated HCl. TMSP concentrations were varied from 1% to 3%. The gel solution was cast on to the membrane metal plate to obtain membrane sheets. The membrane was then oxidized in H2O2 concentrations of (10-30%) to convert the mercapto groups into sulfonate group. Investigations of the cross-linking process and the existence of sulfonate group were conducted by infrared spectroscopy as shown for frequencies at 1140每1200/cm and 1200每1145/cm respectively. The scanning electron microscope每energy dispersive X-rays (SEM每EDX) of the membranes indicated that the distribution of silica particles from sol每gel reaction products was uneven due to the fast exchange rate of condensation. The degree of swelling decreased as methanol concentrations increase for sulfonated PVA每TMSP membrane which opposed toward the value of commercial Nafion membrane. The maximum value of ion exchange capacity of the membrane was 1.82 mmol/g whereas the highest proton conductivity was 3.9 x 10-4 S/cm. Therefore it can be concluded that the membrane was a potential candidate for application in DMFC.
%K DMFC
%K fuel cell
%K nafion
%K PVA
%K TMSP
%U http://journal.ui.ac.id/index.php/science/article/view/1403/1233