Pengaruh lama proses milling dan jenis hardener terhadap distribusi sifat-sifat pelat bipolar PEMFC berbasis komposit grafit/epoksi = The influence of milling process and variation of epoxy hardener on the distribution of properties of bipolar plate PEMFC based on graphite/epoxy
Bangkit Indriyana;
Yunita Sadeli, supervisor; Bambang P., supervisor; Sri Harjanto, examiner
([Publisher not identified]
, 2013)
|
ABSTRAK Penelitian ini membahas tentang pengaruh lama proses milling dan penggunaan jenishardener yang berbeda pada distribusi konduktivitas listrik dan sifat mekanis kompositpelat bipolar Grafit/Epoksi untuk aplikasi PEMFC. Komposisi material yaitu 75 wt%grafit sintetis (Merck®) dan 5 wt% carbon black (CB) hasil karbonisasi serat kelapa dan20 wt% epoksi resin (bisphenol A ® + Polyamino Amide dan bisphenol A ® +Cycloaliphatic amine) sebagai binder. Pelat bipolar dipreparasi menggunakan millingdengan media air menggunakan ball mill lalu dicetak menggunakan proses cetak panas.Proses milling dilakukan selama 1, 2, 3 dan 4 hari. Proses pencetakan dilakukanmenggunakan mesin single stroke compression molding. Tekanan, suhu proses, danwaktu berturut-turut ialah 55 MPa, 100oC, dan 4 jam. Hasil menunjukkan kekuatanfleksural tertinggi terdapat pada sampel hasil milling 4 hari sebesar 44.8 MPa sementara densitas dan prositasnya ialah 3.012 gr/cm3 dan 0.665 %. Konduktivitas listrik material tertinggi terdapat pada formula F4 (milling 4 hari) yaitu sebesar 8.13 S/cm. Proses milling diketahui merupakan faktor utama yang mempengaruhi sifat pelat bipolar. Hal ini dikarenakan air meningkatkan distribusi grafit dan CB serta mampu mencegah terbentuknya aglomerasi. Pengaruh penggunaan hardener yang berbeda viskositasnya diketahui mampu meningkatkan konduktivitas listrik material pelat bipolar sebesar 15 S/cm pada sampel FX5 (100% hardener viskositas rendah). Sebaliknya, penambahan hardener viskositas rendah pada sistem komposit pelat bipolar menurunkan kekuatan mekanis material dari 44.75 MPa (0% hardener viskositas rendah) menjadi 29.5 MPa (100% hardener viskositas rendah) sementara densitas dan porositasnya ialah 2.962 g/cm3 dan 0.670 % untuk formula 0% hardener viskositas rendah, 2.548 g/cm3 dan 0.988 % untuk formula 100% hardener viskositas rendah. ABSTRACT An investigation is made of influences of milling time and different types of hardener tothe distribution of electrical and mechanical properties of Carbon/Epoxy composites asbipolar plate in proton-exchange membrane fuel cells (PEMFC). The materialcomposition of bipolar plate was 75 wt% synthetic graphite (Merck®) and 5 wt% carbonblack (CB) from carbonization of palm oil fibers with epoxy resin (bisphenol A ® +Polyamino Amide and bisphenol A ® + Cycloaliphatic amine) as binder in the amount of20 wt%. Bipolar plate were prepared by compounding using water as grinding media inball mill and followed by compression molding. Ball milling is performed both formixing and milling process, this process was carried out for 1, 2, 3 and 4 days. Thecompounding method was conducted using single stroke compression molding machine.The process parameters, such as pressure and temperature, were set respectively 55 MPafor 4 hours at 100oC. The results indicate that there is an optimum range of milling time(3-4 days) with respect to the distribution profile of electrical conductivity andmechanical properties of bipolar plate. The highest flexural strength was 44.8 MPa whilstthe density and porosity of the bipolar plate respectively were measured 3.012 gr/cm3 and0.665 %. Bipolar plate have resulted relatively low electrical conductivity up to 8.13S.cm−1 but it shows good distribution in all area along the plate. The grinding process wasfound as one major factor affecting the properties of bipolar plate. Since water acts asgrinding media to increase uniformity and distribution of graphite and CB duringgrinding process and also act as an agent to prevent agglomeration. The effect of usingdifferent types of hardener was found can improve the conductivity up to 15 S/cm. On theother hand, the flexural strength and % deflection were reduced in the presence of lowviscosity hardener, from 44.75 MPa (0%wt low viscosity hardener) to 29.5 MPa (100%wtlow viscosity hardener) whilst the density and porosity of the bipolar plate respectivelywere measure 2.962 g/cm3 and 0.670 % for formula 0%wt low viscosity hardener, 2.548g/cm3 and 0.988 % formula 100%wt low viscosity hardener. |
![]()
|
No. Panggil : | T34820 |
Entri utama-Nama orang : | |
Entri tambahan-Nama orang : | |
Entri tambahan-Nama badan : | |
Subjek : | |
Penerbitan : | [Place of publication not identified]: [Publisher not identified], 2013 |
Program Studi : |
Bahasa : | ind |
Sumber Pengatalogan : | LibUI ind rda |
Tipe Konten : | text |
Tipe Media : | unmediated ; computer |
Tipe Carrier : | volume ; online resource |
Deskripsi Fisik : | xiii, 68 pages : illustration ; 28 cm + appendix |
Naskah Ringkas : | |
Lembaga Pemilik : | Universitas Indonesia |
Lokasi : | Perpustakaan UI, Lantai 3 |
No. Panggil | No. Barkod | Ketersediaan |
---|---|---|
T34820 | 15-20-633122890 | TERSEDIA |
Ulasan: |
Tidak ada ulasan pada koleksi ini: 20348560 |