Gunawan, Matheus Christopher (2023) Analisis Pengaruh Variasi Rasio Volume H2SO4 Dan Waktu Pengadukan Terhadap Reaksi Sulfonasi Polistirena Pada Preparasi Membran SPEEK/SGO/SPS untuk Aplikasi PEMFC. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proton Exchange Membrane Fuel Cell (PEMFC) merupakan sistem konversi berbasis elektrokimia yang dipilih sebagai salah satu energi alternatif untuk menggantikan bahan bakar konvensional. Dibandingkan jenis sel bahan bakar lainnya, PEMFC memiliki banyak kelebihan termasuk temperatur pengoperasian yang rendah, densitas daya tinggi, fleksibilitas bahan bakar, serta kecil peluang mengalami korosi dan kebocoran. Namun, penelitian terkait PEMFC masih memiliki kendala yaitu membran komersil Nafion dengan masa pakai yang rendah dan tidak ekonomis. Sejauh ini telah dikembangkan membran paduan sulfonated polyether ether ketone dan sulfonated graphene oxide (SPEEK/SGO) yang memiliki stabilitas termal, kimia, dan mekanik yang signifikan dengan rendahnya nilai swelling ratio. Namun, peningkatan kandungan SGO menyebabkan penurunan water uptake akibat blocking effect situs hidrofilik sehingga IEC dan konduktivitas tidak maksimal. Modifikasi membran dengan aditif sulfonated polystyrene (SPS) dilakukan untuk meningkatkan kemampuan water uptake, IEC, dan konduktivitas membran dengan semakin besar nilai derajat sulfonasi yang menunjukkan jumlah dan kualitas terbentuknya gugus asam sulfonat (SO3H). Penelitian ini bertujuan untuk menganalisis pengaruh variasi rasio volume H2SO4 dan waktu pengadukan pada reaksi sulfonasi polystyrene terhadap sifat membran SPEEK/SGO/SPS. Proses sintesis menggunakan metode solution casting dengan bantuan pelarut NMP untuk mendapatkan padatan membran SPEEK/SGO/SPS. Selanjutnya dilakukan uji karakterisasi menggunakan XRD, FTIR, SEM, TGA, water uptake dan swelling ratio (%), IEC, EIS, pengujian tarik, dan single cell test. Didapatkan bahwa variasi waktu pengadukan dan rasio volume H2SO4 2 kali mula-mula pada reaksi sulfonasi polystyrene meningkatkan nilai derajat sulfonasi sehingga meningkatkan performa membran. Membran SPEEK/SGO/SPS (48, 2:1) merupakan variasi yang sesuai untuk aplikasi PEMFC pada temperatur 25-60oC dengan nilai water uptake, swelling ratio, IEC, dan konduktivitas sebesar 48,04%; 20,35%; 3,01; dan 1,9899 × 10-4 S/cm. Selain itu, membran SPEEK/SGO/SPS (48, 2:1) mampu menghasilkan nilai OCV sebesar 0,77 V dan maksimum power density sebesar 26,03 mW/cm2.
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Proton Exchange Membrane Fuel Cell (PEMFC) is an electrochemical-based conversion system chosen as an alternative energy to replace conventional fuels. Compared to other types of fuel cells, PEMFC has many advantages including low operating temperature, high power density, fuel flexibility, and less chance of corrosion and leakage. However, research related to PEMFC still has problems, namely the commercial Nafion membrane with a low service life and is not economical. So far a membrane alloy of sulfonated polyether ether ketone and sulfonated graphene oxide (SPEEK/SGO) has been developed which has significant thermal, chemical and mechanical stability with a low swelling ratio. However, an increase in SGO content causes a decrease in water uptake due to the blocking effect of hydrophilic sites so that the IEC and proton conductivity are not optimal. Membrane modification with sulfonated polystyrene (SPS) additives was carried out to increase the ability of water uptake, IEC, and membrane conductivity with the greater the degree of sulfonation indicating the amount and quality of the formation of sulfonic acid groups (SO3H). This study aims to analyze the effect of variations in the volume ratio of H2SO4 and stirring time in the polystyrene sulfonation reaction on the properties of SPEEK/SGO/SPS membranes. The synthesis process uses the solution casting method with the help of NMP solvent to obtain SPEEK/SGO/SPS membrane solids. Then characterization tests were carried out using XRD, FTIR, SEM, TGA, water uptake and swelling ratio (%), IEC, EIS, tensile testing, and single cell tests. It was found that the initial variation of the stirring time and the volume ratio of H2SO4 2 times in the polystyrene sulfonation reaction increased the value of the degree of sulfonation thereby increasing the performance of the membrane. SPEEK/SGO/SPS membrane (48, 2:1) is a variation suitable for PEMFC applications at temperatures of 25-60oC with water uptake, swelling ratio, IEC, and conductivity values of 48.04%; 20.35%; 3,01; and 1.9899 × 10-4 S/cm. In addition, the SPEEK/SGO/SPS membrane (48, 2:1) is capable of producing an OCV value of 0,77 V and a maximum power density of 26,03 mW/cm2.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | PEMFC, SGO, SPEEK, SPS, Sulfonasi ============================================================ PEMFC, SGO, SPEEK, SPS, Sulfonatiom |
| Subjects: | Q Science > QC Physics > QC173.4.C63 Composite materials T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2931 Fuel cells T Technology > TP Chemical technology > TP1140 Polymers |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Matheus Christopher Gunawan |
| Date Deposited: | 26 Jul 2023 15:27 |
| Last Modified: | 26 Jul 2023 15:27 |
| URI: | http://repository.its.ac.id/id/eprint/99503 |
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