SAFITRI, GLADIS AROS (2016) PENGARUH VARIASI KOMPOSISI PVA/KITOSANTERHADAP PERILAKU MEMBRAN KOMPOSIT PVA/KITOSAN/GRAFIN OKSIDA YANG TERIKAT SILANG TRISODIUM SITRAT. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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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 TGA, uji
tarik, uji water uptake dan methanol uptake, serta pengukuran
konduktivitas proton. Pada uji TGA diketahui bahwa membran tipe
1 memiliki kestabilan termal paling baik dengan persen massa yang
hilang sebesar 23,29%. 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.
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PVA/chitosan/graphene oxide composite membranes
crosslinked with trisodium citrate for Direct Methanol Fuel Cell
application have been synthesized. Membranes were prepared by
varied the mass composition of PVA/chitosan (1:5, 2:4, 3:3, 4:2,
5:1) and added 1,5% of trisodium citrate to produced
PVA/chitosan/graphene oxide composite membranes type 1, type
2, type 3, type 4, and type 5, respectively. The mechanical
properties, physical-chemical properties, and membrane
performance were investigated using various characterization
methods like TGA characterization, tensile strength test, water
uptake, methanol uptake, and proton conductivity measurements.
Composite membrane type 1 showed the best thermal stability
compared to others which has a lowest weight loss (23,29%). The
best mechanical strength of composite membranes belongs to
membrane type 2 which has the highest modulus of elasticity
(2583,1 MPa). Water uptake and methanol uptake of composite
membranes tend to increase along with the PVA addition. While
the highest proton conductivity (21,29 x 10-3 S.cm-1) occurred in
membrane type 2 with 90 minutes hydration times.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKi 573.774 Saf p |
| Uncontrolled Keywords: | DMFC; grafin oksida; kitosan; membran komposit; PVA; trisodium sitrat; waktu hidrasi. |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | Faculty of Mathematics and Science > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 16 Jan 2017 03:44 |
| Last Modified: | 27 Dec 2018 06:55 |
| URI: | http://repository.its.ac.id/id/eprint/1600 |
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