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All Journal Jurnal Keramik dan Gelas Indonesia Jurnal Material Kedokteran Gigi Jurnal Teknologi Bahan dan Barang Teknik Jurnal Keramik dan Gelas Indonesia
Bambang Sunendar Purwasasmita
Institut Teknologi Bandung
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Dentistry Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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The Effect of Aging Time on Biosynthesis of Zirconia Nanoparticles by Nanocellulose Templates Ratih Resti Astari; Didit Nur Rahman; Rifki Septawendar; Bambang Sunendar Purwasasmita
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7409

Abstract

In this study, the biosynthesis of ZrO2 nanomaterials was carried out using nano cellulose template from the biomass of oil palm empty fruit bunches (Elaeis guineensis). The purpose of this study was to determine the effect of nanocellulose from oil palm empty fruit bunches as a template and aging time in the formation of ZrO2 nanoparticles. The method in this research for synthesis of ZrO2 nanoparticles is the template-precursor method. The biosynthesis of ZrO2 nanoparticles calcined at 600 °C produced a metastable tetragonal phase with a nanorod-like morphology with diameter <100 nm, length <200 nm and agglomeration of nanoparticles with an average particle size of 13 nm - 17 nm.
The Effect of Aging Time on Biosynthesis of Zirconia Nanoparticles by Nanocellulose Templates Ratih Resti Astari; Didit Nur Rahman; Rifki Septawendar; Bambang Sunendar Purwasasmita
Jurnal Keramik dan Gelas Indonesia Vol 30, No 2 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i2.7409

Abstract

In this study, the biosynthesis of ZrO2 nanomaterials was carried out using nano cellulose template from the biomass of oil palm empty fruit bunches (Elaeis guineensis). The purpose of this study was to determine the effect of nanocellulose from oil palm empty fruit bunches as a template and aging time in the formation of ZrO2 nanoparticles. The method in this research for synthesis of ZrO2 nanoparticles is the template-precursor method. The biosynthesis of ZrO2 nanoparticles calcined at 600 °C produced a metastable tetragonal phase with a nanorod-like morphology with diameter <100 nm, length <200 nm and agglomeration of nanoparticles with an average particle size of 13 nm - 17 nm.
Pengaruh Penambahan Bahan Pengisi Kaolin Pada Kekerasan Resin Polymethyl Methacrylate Untuk Aplikasi Mahkota Jaket Hernindya Dwifulqi; Angela Evelyna; Bambang Sunendar Purwasasmita
Jurnal Material Kedokteran Gigi Vol 2 No 2 (2013): JMKG Vol 2 No 2 September 2013
Publisher : Ikatan Peminat Ilmu Material dan Alat Kedokteran Gigi (IPAMAGI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.837 KB)

Abstract

Resin akrilik (PMMA) heat-cure umumnya digunakan dalam bidang kedokteran gigi, satu diantaranya adal mahkota jaket akrilik. Salah satu sifat dari resin akrilik yangs erring menjadi masalah adalah buruknya resistensi penggunaan yang menghadilkan durabilitas yang rendah, ini dkarernakan kekerasan akrilik lebih rendah dibandingkan bahan restiratif lain. Maka, untuk meningkatkan kekerasanya, partikel bahan pengisi inorganic dapat ditambahkan. Salah satu bahan inorganic yang melimpah di Indonesia, disebut kaolin yang mengandung partikel kaolinit yang tidak bisa secara mudah dipecahkan dan dipisahkan sehingga kaolinit dapat membentuk pertahanan yang tidka mudah didegradasi. Tujuan dari penelitian ini adalah untuk menambah partikel bahan pengisi kaolin pada resin akrilik heat-cured da menghitung kekerasannya. Bubuk metakaolin yang digunakan padapenelitian ini dibuat dari bubuk kaolin yang terkalsinasi dengan tigarasio berbeda (setiap kelompok terdiri dari 5 spesimen) dan kemudia kekerasan dari setiap kelompok diuji menggunakan metode uji micro-vickers, kemudian satu kelompok yang memiliki hasil paling baik diuji dengan Scanning Electron Microscope untuk melihat distribusi bahan pengisi. Hasilnya adalah kekerasan resin akrilik meningkat secara proposional dengan peningkatan jumlah bahan pengisi, dimana peningkatan paling signifikan didapat dari kelompok dengan bahan pengisi kaolin 50% dimana distribusi bahan pengisi terlihat homogen setelah dilakukan analisa foto SEM dari komposit yang dibuat. Bahan pengisi kaolin dapat digunakan sebagai bahan pengisi resin akrilik untuk meningkatkan sifat kekerasan resin komposit.
Laboratory Scale Production of Lithium Manganese Oxide as Active Material of Lithium-Ion Batteries in Sol-Gel Method Assisted by Local Biomass Muhammad Ilham Bayquni; Susanto Sigit Rahardi; Elsy Rahimi Chaldun; Bambang Sunendar Purwasasmita
Jurnal Teknologi Bahan dan Barang Teknik Vol 10, No 2 (2020)
Publisher : Balai Besar Bahan dan Barang Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37209/jtbbt.v10i2.178

Abstract

Experimental and theoretical studies of the production of lithium manganese oxide (LiMn2O4) using sol-gel method have been carried out on a larger scale than previous studies.  The purpose of this investigation was to observe sample behavior along the synthesis process to be considered in further scale-up production of lithium manganese oxide, based on the sol-gel method. Calcination products were analyzed by TGA and crystalline phase formation analyzed by XRD. LiMn2O4 spinel phase was formed at 600oC. SEM showed some interesting morphology. Xerogel swelling was observed overwhelmingly during drying at 250oC to 300oC. Exothermic occurrence as a source of irregular and unpredictable auto combustion in the calcination process. Both phenomenon were not observed in a xerogel made with a small amount precursor. Therefore, initial mixture adjustment and additional steps were considered for production.
Co-Authors Angela Evelyna Didit Nur Rahman Dwifulqi, Hernindya Elsy Rahimi Chaldun Muhammad Ilham Bayquni Ratih Resti Astari Rifki Septawendar Susanto Sigit Rahardi