Pembuatan Membran PVA/Kitosan/Silika dan Karakterisasinya untuk Aplikasi Membran Sel Bahan Bakar

Melati, Ranny Etna (2017) Pembuatan Membran PVA/Kitosan/Silika dan Karakterisasinya untuk Aplikasi Membran Sel Bahan Bakar. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Membran PVA/Kitosan/Silika, dengan dan tanpa ikat silang (oleh trisodium sitrat), telah berhasil disintesis untuk aplikasi Direct Methanol Fuel Cell. Pembuatan membran dilakukan dengan komposisi massa PVA:Kitosan sebesar 5:1 dan variasi kandungan silika 5, 10, 15, 20 dan 25%. Penambahan silika dan ikat silang dapat meningkatkan nilai max stress dan break elongation pada uji tarik dan stabilitas termal pada uji TGA. Nilai uji tarik (1181,6 MPa) dan persen degradasi (52,92%) terbaik dicapai oleh membran PVA/Kitosan/25%Silika terikat silang. Persentase water dan methanol uptake menurun dengan penambahan silika dan ikat silang. Membran PVA/Kitosan/5%Silika tanpa ikat silang memiliki nilai water uptake paling tinggi (125,27%), sedangkan nilai methanol uptake paling rendah (2,27%) dicapai oleh membran PVA/Kitosan/25%Silika terikat silang. Konduktivitas proton mencapai puncak pada komposisi silika 15% untuk membran tanpa ikat silang dan silika 10% untuk membran dengan ikat silang. Nilai konduktivitas masing-masing yang didapatkan adalah 0,96 x 10-3 S cm-1 dan 0,99 x 10-3 S cm-1. ============================================================================================= PVA/Chitosan/Silica membrane, crosslinked and uncrosslinked (by trisodium citrate), have been synthesized for Direct Methanol Fuel Cell application. Membranes were prepared by PVA:Chitosan mass ratio 5:1 and varied the volume composition of silica (5, 10, 15, 20 and 25%). The addition of silica and crosslinking agent increase the value of max stress and break elongation in tensile test, and thermal stability in thermogravimetry analysis. The best value of tensile test (1181,6 MPa) and degradation percentage (52,92%) belong to crosslinked PVA/Chitosan/25%Silica membrane. Water and methanol uptake percentage decrease along with the addition of silica and crosslinking agent. Uncrosslinked PVA/Chitosan/5%Silica had the highest value of water uptake (125,27%), while the lowest value of methanol uptake belongs to crosslinked PVA/Chitosan/25%Silica membrane. Proton conductivity reached the top on 15% silica component of uncrosslinked membrane and 10% silica of crosslinked membrane. The value is 0,96 x 10-3 S cm-1 and 0,99 x 10-3 S cm-1 respectively.

Item Type: Thesis (Undergraduate)
Additional Information: RSKi 573.774 Mel p
Uncontrolled Keywords: DMFC, PVA, kitosan, silika, ikat silang, membran komposit polimer, chitosan, silica, crosslinking agent, polymer composite membrane
Subjects: Q Science
Q Science > QD Chemistry
Q Science > QD Chemistry > Polymerization
Q Science > QD Chemistry > QD502 Chemical kinetics
Divisions: Faculty of Mathematics and Science > Chemistry > (S1) Undergraduate Theses
Depositing User: Melati Ranny Etna
Date Deposited: 06 Nov 2017 04:44
Last Modified: 09 Jan 2018 07:31
URI: http://repository.its.ac.id/id/eprint/47749

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