Sintesis Dan Karakterisasi Membran Elektrolit Kitosan/Alginat/Asam Fosfotungstat Mesopori Untuk Aplikasi Direct Methanol Fuel Cell

Hartanti, Evin Ayu (2022) Sintesis Dan Karakterisasi Membran Elektrolit Kitosan/Alginat/Asam Fosfotungstat Mesopori Untuk Aplikasi Direct Methanol Fuel Cell. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Membran elektrolit berbasis kitosan telah berhasil disintesis dengan metode inversi fasa dan dilakukan analisis sifat fisikokimia untuk masing-masing membran. Tujuan dari penelitian ini adalah memperoleh membran elektrolit dengan matriks kitosan dan alginat serta filler asam fosfotungstat mesopori (mPTA) untuk aplikasi Direct Methanol Fuel Cell (DMFC). Penelitian ini terdiri dari beberapa tahap yaitu sintesis filler mPTA, sintesis membran, karakterisasi, dan uji kinerja. Karakterisasi terdiri dari FTIR, PSA, adsorpsi-desorpsi N2, XRD, dan uji tarik sedangkan, uji kinerja membran terdiri dari permeabilitas metanol dan konduktivitas proton. Membran yang disintesis terdiri dari membran Kit/Alg dengan perbandingan (2:1), (3:1), dan (5:1). Pada penelitian ini, kitosan dengan penambahan alginat menunjukkan peningkatan tensile strength dengan komposisi membran Kit/Alg(3:1) sebesar 26,64 N/mm2. Membran Kit/Alg(3:1) selanjutnya divariasi dengan penambahan filler mPTA. Filler mPTA yang dihasilkan mempunyai ukuran partikel 191,88 nm, ukuran pori 3,705 nm, volume pori 0,016 cc g-1, dan terbentuknya puncak baru pada 2θ = 27°. Membran Kit/Alg(3:1) dilakukan penambahan filler mPTA dengan variasi 0,05; 0,10; 0,15; 0,20; dan 0,25%. Membran Kit/Alg/mPTA(3:1:0,20%) memiliki kinerja terbaik dengan nilai permeabilitas metanol sebesar 8,17 × 10-6 cm2 s-1 dan nilai konduktivitas proton sebesar 45,8 × 10-3 S cm-1. ================================================================================================ Chitosan-based electrolyte membranes have been successfully synthesized by the phase inversion method and physicochemical properties analysis was carried out for each membrane. The purpose of this study was to obtain an electrolyte membrane with a matrix of chitosan and alginate as well as mesoporous phosphotungstic acid (mPTA) filler for Direct Methanol Fuel Cell (DMFC) applications. This research consisted of several stages, namely the synthesis of mPTA filler, synthesis of membrane, characterization, and performance testing. The characterization consisted of FTIR, PSA, N2 adsorption-desorption, XRD, and tensile test, while the membrane performance test consisted of methanol permeability and proton conductivity. The synthesized membrane consisted of Kit/Alg membrane in a ratio of (2:1), (3:1), and (5:1). In this study, chitosan with the addition of alginate give an increase in tensile strength with a membrane composition of Kit/Alg(3:1) membrane of 26.64 N/mm2. The Kit/Alg(3:1) membrane was then varied by adding mPTA filler. The resulting mPTA filler has a particle size of 191.88 nm, a pore size of 3.705 nm, a pore volume of 0.016 cc g-1, and the formation of a new peak at 2θ = 27°. The Kit/Alg(3:1) membrane was added with mPTA filler with a variation of 0.05; 0.10; 0.15; 0.20; and 0.25%. The Kit/Alg/mPTA(3:1:0.20%) membrane has the best performance with a methanol permeability value of 8.17 × 10-6 cm2 s-1 and a proton conductivity value of 45.8 × 10-3 S cm-1.

Item Type: Thesis (Masters)
Uncontrolled Keywords: electrolyte membrane, chitosan, alginate, mesoporous phosphotungstic acid, DMFC, membran elektrolit, kitosan, alginat, asam fosfotungstat mesopori, DMFC
Subjects: Q Science
Q Science > QD Chemistry
Q Science > QD Chemistry > Polymerization
Q Science > QD Chemistry > QD553 Electrochemistry. Electrolysis
Divisions: Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User: EVIN AYU HARTANTI
Date Deposited: 31 Jan 2022 01:42
Last Modified: 31 Jan 2022 01:42
URI: https://repository.its.ac.id/id/eprint/92563

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