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All Journal Jurnal Natur Indonesia Padjadjaran Journal of Dentistry Proceeding Seminar Nasional IPA
Solihudin, Solihudin
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Education Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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Pengaruh Ukuran Partikel Arang Sekam Padi Dan Waktu Refluks terhadap Kadar Abudan Daya Serap Karbon Sekam Padi Solihudin, Solihudin; Noviyanti, Atiek Rostika; Rahayu, Iman
Jurnal Natur Indonesia Vol 17, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.108 KB) | DOI: 10.31258/jnat.17.1.33-41

Abstract

The highest content in rice husk is ash with its main component of silica. Silica in ash causes the low adsorption capacity. Activated carbon from rice husk can be obtained by lowering the ash content. The aim of this study is determine the effect of particle size of charcoal and reflux time the ash content using a solution of potassium carbonate. The activation of rice husk char was carried out by using reflux methods with a potassium carbonate solution. The resulted carbon was washed using hydrochloric acid tested using iodine and methylene blue to examine of its adsorbance. The particle size of rice husk and reflux time decrease ash content in rice husk. In general, husk with the size of 80 mesh can produce carbon with low ash content and high absorption using reflux time at least for 120 minutes. Rice husk size of 100 mesh refluxing with potassium carbonate for 150 minutes can reduce the ash content as 91.85% and adsorptivity of the iodine at 331 mg.g -1 .
Effect of 3-methacryloxypropyltrimethoxysilane on diametral tensile strength of rice husk silica-based dental composite Febrida, Renny; Wulanhapsari, Madeiva; Faza, Yanwar; Karlina, Elin; Cahyanto, Arief; Solihudin, Solihudin; Eddy, Diana Rakhmawati
Padjadjaran Journal of Dentistry Vol 34, No 2 (2022): July
Publisher : Faculty of Dentistry Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/pjd.vol34no2.41242

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ABSTRACTIntroduction: Rice husk silica has been studied as a filler in dental composite, however, the mechanical properties of the resulting composites are below the commercial due to the poor surface modification between silica and resin matrix. 3-methacryloxyprpyltrimethoxysilane (MPTS) is one of the coupling agents that are effective to modify the silica surface. The purpose of this study to analyze the effect of MPTS on the diametral tensile strength (DTS) of the self-made composite using rice husk silica.  Methods: The research type of this study was an experimental research laboratory. The samples (26 samples) were divided into two groups, namely the test group (using MPTS-modified silica) and the control group (using non-modified silica). The samples were cylindrical in shape with a diameter of 6.0 ± 0.1 mm and a height of 3.0 ± 0.1 mm according to ANSI/ADAS No. 27, 1993 and ISO 4049, 1988. The Fourier Transform Infrared (FTIR), HORIBA, was used to characterize the MPTS grafting on the silica surface. The DTS value is measured by Universal Testing Machine (UTM), Lloyd LRX Plus. Results: FTIR presents the additional peak of carboxyl and methacryloyl group at 1716, 1555, and 1410 cm-1 wavenumber, respectively in MPTS-modified silica. The DTS value of the test group was 43.40 ± 4.43 MPa and the control group was 25.80 ± 2.63 MPa. The test group was significantly higher than the control group (p-value = 0.001). Conclusion: The MPTS is effective to enhance the DTS value of rice husk silica-based composite.Keywords: Rice husk silica; dental composite; diametral tensile strength; 3-methacryloxypropyltrimethoxysilane.
PERMEASI GAS KARBON DIOKSIDA DENGAN MEMBRAN KOMPOSIT SELULOSA ASETAT SERAT RAMI/ZEOLIT ALAM Haryono, Haryono; Solihudin, Solihudin; Ernawati, E. Evy
Proceeding Seminar Nasional IPA 2025
Publisher : LPPM UNNES

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Abstract

Tanaman rami merupakan penghasil serat potensial. Serat rami memiliki karakteristik panjang dan kuat sehingga dapat dimanfaatkan sebagai sumber selulosa yang unggul. Salah satu pemanfaatan selulosa rami tersebut adalah sebagai bahan baku pada pembuatan membran selulosa asetat (SA). Membran SA dapat digunakan dalam pemisahan gas karbon dioksida. Namun karena kemampuan permeabilitasnya rendah, maka membran SA perlu untuk dimodifikasi. Tujuan penelitian ini mensintesis membran komposit SA serat rami/zeolit alam, dan mengkarakterisasinya berdasarkan nilai permeabiltas membran terhadap gas karbon dioksida. Metode penelitian meliputi asetilasi terhadap selulosa dari serat rami, pengkompositan SA dengan zeolit alam dengan metode inversi fase, peningkatan karakteristik membran komposit dengan metode annealing pada variasi suhu 60, 70, 80, dan 90 °C, dan uji permeasi membran komposit SA/zeolit alam yang telah dihasilkan terhadap gas karbon dioksida. Hasil penelitian menunjukkan bahwa membran komposit SA/zeolit alam tersebut memiliki nilai permeabilitas terhadap gas karbon dioksida tertinggi sebesar 118,15 barrer, ketika tahap annealing dilakukan pada suhu 70 C.
Co-Authors Atiek Rostika Noviyanti Cahyanto, Arief Cecep Kusmana Eddy, Diana Rakhmawati Elin Karlina Ernawati, E. Evy Haryono Haryono Renny Febrida Wulanhapsari, Madeiva Yanwar Faza