Perbandingan Variasi Komposisi PVA/Kitosan Terhadap Perilaku Membran Komposit PVA/Kitosan/Grafin Oksida Yang Terikat Silang Trisodium Sitrat

Gladis Aros Safitri, Eko Santoso
Submission Date: 2016-01-29 17:13:26
Accepted Date: 2016-04-28 10:46:37

Abstract


Membran komposit PVA/kitosan/grafin oksida yang terikat silang trisodium sitrat untuk diaplikasikan pada Direct Methanol Fuel Cell (DMFC) telah berhasil disintesis. Membran dibuat dengan melakukan variasi komposisi massa PVA/kitosan (1:5; 2:4, 3:3; 4:2; dan 5:1) serta penambahan grafin oksida sebanyak 1,5% untuk menghasilkan membran komposit PVA/kitosan/grafin oksida tipe 1, tipe 2, tipe 3, tipe 4, dan tipe 5. Membran komposit tersebut kemudian dikarakterisasi untuk mengetahui sifat mekanik, sifat fisika dan kimia, serta kinerjanya menggunakan uji tarik, uji water uptake dan methanol uptake, serta pengukuran konduktivitas proton. Pada uji tarik, membran tipe 2 memiliki kekuatan mekanik yang paling tinggi dengan nilai modulus elastisitasnya sebesar 2583,1 MPa. Water uptake dan methanol uptake cenderung meningkat seiring semakin besarnya komposisi PVA dalam membran komposit. Sedangkan konduktivitas proton paling tinggi dimiliki oleh membran tipe 2 dengan waktu hidrasi 90 menit yaitu sebesar 21,29 x 10-3 S.cm-1.

Keywords


DMFC; grafin oksida; kitosan; membran komposit; PVA; trisodium sitrat; waktu hidrasi

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