Evaluasi Kinerja Membran Komposit Terner Kitosan/Poli(Eter-Eter-Keton)/Grafen Oksida Terfungsionalisasi Pada Aplikasi Direct Methanol Fuel Cell

Nurakhirawati, Nurakhirawati (2023) Evaluasi Kinerja Membran Komposit Terner Kitosan/Poli(Eter-Eter-Keton)/Grafen Oksida Terfungsionalisasi Pada Aplikasi Direct Methanol Fuel Cell. Doctoral thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Membran komposit terner berbasis kitosan telah berhasil difabrikasi dengan metode penguapan pelarut (solvent-evaporation) dan dilakukan evaluasi kinerja untuk masing-masing membran komposit. Tujuan dari penelitian ini adalah memfabrikasi membran melalui penggabungan antara matriks kitosan/poli(eter-eter-keton) tersulfonasi (SPEEK) dengan filler montmorillonite (MMT)/grafen-oksida-tersulfonasi (SGO), menghitung energi listrik yang dapat dihasilkan melalui sistem membrane-electrode-assembly (MEA), dan menjelaskan kinerja serta interaksi-interaksi kimiawi pada membran yang berkaitan dengan sifat-sifatnya untuk keperluan DMFC. Penelitian ini terdiri dari beberapa tahap yaitu sintesis kitosan, fungsionalisasi grafen oksida, fungsionalisasi PEEK, preparasi filler MMT/SGO, fabrikasi membran komposit, karakterisasi, dan uji kinerja membran. Dalam penelitian ini, penambahan filler MMT/SGO memberikan peningkatan kinerja pada membran kitosan/SPEEK dengan komposisi filler optimum yaitu 1 g MMT/SGO. Komposisi filler tersebut memberikan kinerja terbaik diantara membran komposit yang lain. Membran-membran komposit dianalisis dan diuji dengan Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), DMFCingle-cell test, dan uji-uji fisikokimia. Membran komposit kitosan/SPEEK/MMT/SGO-1 memiliki kinerja terbaik dengan nilai konduktivitas proton sebesar 19,40 mS.cm-1 dan permeabilitas metanol sebesar 4,13×10-6 cm2.s-1, serta sektivitas membran yang dihasilkan adalah 4,70×103 S.s.cm-3. Energi listrik yang ditentukan melalui komponen MEA diperoleh nilai optimum pada densitas daya 23,5 mW.cm-2 dan densitas arus 140 mA.cm-2 pada tegangan 0,26 V
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Chitosan-based ternary composite membranes have been successfully fabricated using the solvent-evaporation method and the performance evaluation of each composite membrane was carried out. The purpose of this research is to fabricate membranes by combining sulfonated chitosan/poly(ether-ether-ketone) matrix (SPEEK) with montmorillonite (MMT)/graphene-oxide-sulphonated (SGO) filler, calculating the electrical energy that can be generated through the membrane system. -electrode-assembly (MEA), and describes the performance and chemical interactions of membranes related to their properties for DMFC purposes. This research consisted of several stages, namely chitosan synthesis, graphene oxide functionalization, PEEK functionalization, MMT/SGO filler preparation, composite membrane fabrication, characterization, and membrane performance tests. In this study, the addition of MMT/SGO filler gave an increase in performance on chitosan/SPEEK membranes with the optimum filler composition of 1 g MMT/SGO. The filler composition provides the best performance among other composite membranes. Composite membranes were analyzed and tested by Fourier Transform Infrared (FTIR), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), DMFC single-cell test, and physicochemical tests. The chitosan/SPEEK/MMT/SGO-1 composite membrane had the best performance with a proton conductivity value of 19.40 mS.cm-1 and methanol permeability of 4.13×10-6 cm2.s-1, and the resulting membrane selectivity was 4.70×103 S.s.cm-3. Electrical energy determined through the MEA component obtained the optimum value at a power density of 23.5 mW.cm-2 and a current density of 140 mA.cm-2 at a voltage of 0.26 V

Item Type:	Thesis (Doctoral)
Uncontrolled Keywords:	Kitosan, poli(eter-eter-keton), grafen oksida, montmorillonite, DMFC; Chitosan, poly(ether-ether-ketone), graphene oxide, montmorillonite, DMFC
Subjects:	T Technology > TP Chemical technology > TP159.M4 Membranes (Technology)
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47001-(S3) PhD Thesis
Depositing User:	EKO BUDI RAHARJO
Date Deposited:	06 Apr 2023 06:56
Last Modified:	06 Apr 2023 06:56
URI:	http://repository.its.ac.id/id/eprint/97851

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