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Contact Name
Dr. Muhammad Rifai
Contact Email
jusami@batan.go.id
Phone
(021) 75874261
Journal Mail Official
jusami@batan.go.id
Editorial Address
-
Location
Kota adm. jakarta selatan,
Dki jakarta
INDONESIA
Jurnal Sains Materi Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Jurnal Sains Materi Indonesia (Indonesian Journal of Materials Science), diterbitkan oleh Pusat Teknologi Bahan Industri Nuklir - BATAN. Terbit pertama kali: Oktober 1999, frekuensi terbit: empat bulanan.
Arjuna Subject : -
Articles 980 Documents
SIFAT KOMPOSIT EPOKSI BERPENGUAT SERAT BAMBU PADA AKIBAT PENYERAPAN AIR Refiadi, Gunawan; Syamsiar, Yusi Siti; Judawisastra, Hermawan
Jurnal Sains Materi Indonesia Vol 19, No 3: April 2018
Publisher : Center for Science & Technology of Advanced Material - National Nuclear Energy Agency of

Show Abstract | Original Source | Check in Google Scholar | Full PDF (293.868 KB) | DOI: 10.17146/jsmi.2018.19.3.4289

Abstract

Serat bambu memiliki potensi sebagai serat penguat pengganti serat gelas dalam pembuatan komposit polimer, karena sifatnya yang terbaharui dan ramah lingkungan. Namun, karena serat bambu memiliki sifat higroskopis, maka sifat tarik komposit yang dihasilkan dapat menurun akibat dari memburuknya ikatan antarmuka serat dan matriks. Penelitian ini bertujuan untuk mengkaji degradasi sifat tarik biokomposit epoksi berpenguat serat bambu petung akibat penyerapan air. Biokomposit epoksi berpenguat serat bambu petung dibuat dengan metode tekan panas dengan variasi serat tanpa alkalisasi (0% NaOH) dan dengan alkalisasi (5% NaOH). Pengujian biokomposit, dilakukan dengan cara uji air mendidih, uji tarik dan SEM. Kadar penyerapan air biokomposit tanpa alkalisasi lebih tinggi dibandingkan dengan biokomposit yang telah mengalami alkalisasi (5% NaOH). Penyerapan air mengakibatkan degradasi pada biokomposit dan menurunkan kekuatan tarik biokomposit hingga 23%. Perlakuan alkali 5% NaOH, dapat meminimalisir persentase penurunan kekuatan biokomposit, dengan persentase penurunan kekuatan tarik sebesar 17%. Hasil pemeriksaan pada permukaan patahan menunjang hasil pengujian tarik. Penurunan kekuatan tarik disebabkan oleh sifat dan penurunan kekuatan antar serat dan matriks
SCALE UP OF ETHANOL PRODUCTION USING PULP MILL WASTEWATER SLUDGE BY CELLULASE AND SACCHAROMYCES CEREVISIAE Sangasintu, Kunchada; Chawakitchareon, Petchporn
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

This study aimed to evaluate the potential use of pulp mill wastewater sludge as substrate in ethanol production. The simultaneous saccharification and fermentation process was conducted by using Saccharomyces cerevisiae TISTR 5339 under optimum proportion of cellulase and pulp mill wastewater sludge. The ethanol production from cellulosic materials in simultaneous saccharification and fermentation needs cooperation between cellulase and yeast. The cellulase hydrolyzes cellulose to sugar while yeast utilizes sugar to produce ethanol. The pulp mill wastewater sludge has an average content of 73.3% hemi cellulose, 67.1% alpha cellulose, 4.7% beta cellulose and 1.4% gramma cellulose. The experimental results indicated that the volume of the ethanol tend to increase with time, providing the maximum ethanol yield of 0.69 g/g on the 7th day, the last day of the experiment. The ethanol production was scaled up in 5 L fermentor under optimum proportion and increased the fermentation period. It was found that the ethanol production gave the maximum ethanol yield of 1.14 g/g on the 9th day of the totally 13 days experimentation. These results showed that the cellulose from pulp mill wastewater sludge was as effective substrate for ethanol production and alternative energy for the future.Keywords: Pulpmill wastewater sludge, Cellulase, Saccharomyces cerevisiae, Saccharification, Simultaneous fermentation.
ULTRASONIC PRETREATMENT OF WOODCHIPS FOR THE CONVERSION OF CELLULOSE TO GLUCOSE FOR BIOETHANOL PRODUCTION Nugraha, Tutun; Ayuputri, Rettyana; Ihsan, Mohammad
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

In this study, lignocellulosic biomass i.e. the woodchips of Albacia tree (Paraserianthes falcataria) were given different pretreatment methods, ie. chemical (acid) and physical (ultrasonic). The pretreatment was given in order to convert the cellulose to glucose for the production of bioethanol. 1% H2SO4 was applied for the acid pretreatment. Ultrasound pretreatment was carried out at varied time (10, 20 and 30 minutes) at 600 W, 20 kHz before or after the acid pretreatment. Enzymatic attack of the pretreated sample was also applied to enhance the saccharification process of cellulose. The objective of the research was to determine the most effective ultrasonic duration and the best combination of method for enzymatic hydrolysis of the woodchips. The data showed that the highest yield of glucose was achieved at 20 minutes ultrasonic time. It was also found that substantial amount of hydrolysis of cellulose to glucose occur during the ultrasonic stage even without the presence of acid or cellulose enzyme. It is likely that the highly energetic ultrasonic process alone could assist in enhancing rate of hydrolysis of lignocellulosic cellulose into glucose.Keywords: Ultrasonic, Sonochemistry, Bioethanol, Lignocellulose, Cellulose,Wood, Enzyme.
ELECTROPHORESIS-BASE DYE ADSORPTION INTO TITANIUM DIOXIDE FILM FOR DYE SENSITIZED SOLAR CELL APPLICATION Nuryadi, Ratno; Akbar Junior, Zico Alaia; Aprilia, Lia
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

Dye Sensitized Solar Cell (DSSC) is one of renewable energy sources which has demanded a substitute non renewable energy sources. The most important factor influencing DSSC performance is dye adsorption into semiconductor nano-porous TiO2 particles. The purpose of this work is to study the effect of dye eosin Y adsorption on DSSC characteristics by an electrophoresis method. As result, Open Circuit Voltage (VOC) of DSSC increases as the applied voltage of electrophoresis increases. It is also found that the eosin Y absorbance at wavelength of around 500 nm increases when the electrophoresis voltage is increased. These results indicate that electrophoresis process plays an important role in dye adsorption.Keywords: DSSC, Dye adsorption, Eosin Y, Electrophoresis process, Applied voltage.
PREPARATION AND CHARACTERISATION OF LITHIUM ARGYRODITE ELECTROLYTES Rao, R. Prasada; Adams, S.
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

Rechargeable All Solid state Lithium Li Ion Batteries (AS-LIBs) are attractive power sources for electrochemical applications, due to their potentiality in improving safety and stability over conventional batteries with liquid electrolytes. AS-LIBs require a Li Fast Ion Conductor (FIC) as the solid electrolyte. Finding a solid electrolyte with high ionic conductivity and compatibility with other battery components is key to building high performance AS-LIBs. There have been numerous studies e.g. on lithium rich sulfide glasses as solid electrolytes. However, the limited current density remains a major obstacle in developing competitive batteries based on the known solid electrolytes. Here we prepare argyrodite type Li6PS5X (X = Cl and Br) using mechanical milling followed by annealing. XRD characterization reveals the formation and growth of Li6PS5X crystals in samples under varying annealing conditions. For Li6PS5Cl an ionic conductivity of the order of 10-3 S.cm-1 is reached at room temperature, which is close to the Li mobility in conventional liquid electrolytes (LiPF6 in various carbonates) and well suitable for AS-LIBs.Keywords: Argyrodite, Solid electrolyte, Ionic conductivity, Bond valence.
SYNTHESIS AND CHARACTERIZATION OF SUPERIONIC (LiBr)0.5(AlSiO)0.5 Jahja, Aziz K.; Purnama, Safei
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

Materials of LiBr silicate aluminum ionic conductor have been prepared by powder metallurgy method in which 0.5 mole of LiBr powder is mixed with about 0.5 mole silicate aluminum in liquid medium of aquadest. After mixing and homogenization, the samples are dried, compacted and heated at 600 oC for 1 hour. Characterization of materials structure was carried out by X-Ray diffraction, ionic conductivity was measured by LCR meter with frequency range of 10-1 to 105 Hz at room temperature. Results of measurement show the (LiBr)0.5(AlSiO)0.5 conductor has the structure of both LiBr and of silicate aluminum. (LiBr)0.5(AlSiO)0.5 has the highest ionic conductivity in the order of 10-3 S.cm-1 while the ionic conductivity of LiBr is found to be about 10-4 S.cm-1 and that of silicate aluminum is about 10-6 S.cm-1, all measured at room temperature.Keywords: AlSiO, (LiBr)0.5(AlSiO)0.5, Powder metallurgy method, Ionic conductivity.
DEVELOPMENT OF THIN FILM OF LiCoO2 FOR MICRO BATTERY ELECTRODE BY USING DC SPUTTERING TECHNIQUE Panjaitan, Elman; Kartini, Evvy; Wagiyo, Wagiyo; Nugraha, Tutun; Ihsan, Mohammad
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

In this study, the development of thin film for electrode utilizing the crystalline LiCoO2 by using DC sputtering technique has been done. The goal was to understand the characteristics of LiCoO2 as a candidate material to be used as cathode for a thin film lithium based micro battery. During the sputtering process, a pelletized LiCoO2 that contained approximately 5 %w/w Poly Vinyledene Fluoride (PVDF) binder was used. The LiCoO2 was deposited on silicone as target substrate. The sputtering result was characterized first by an optical microscope, followed by more detail analysis by using Scanning Electron Microscope coupled with EDS (SEM/EDS), X-Ray Diffraction (XRD) and Atomic Force Microscope (AFM) techniques. The results showed that the thin film of LiCoO2 was deposited on the silicon substrate at 4 µm thickness when the sputtering was carried out at 0.225 Torr pressure, 20 mA current for 6 hours. Based on the AFM studies, however, the thin film was not deposited evenly on the surface. The contour of the surface still contained substantial presence of hills and valleys. Improvement on this matter is still required to optimize the outcome.Keywords: Sputtering, Thin film, Micro battery, Lithium battery, LiCoO2.
HIBISCUS FIBER CARBON FOR FUEL CELL DEVICE MATERIAL Indayaningsih, Nanik; Zulfia, Anne; Priadi, Dedi; ., Suprapedi
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

The objective of this research is carbon of hibiscus fibers for the application as basic material of fuel cell device. The carbon is made using a pyrolysis process in inert gas (nitrogen) for 1 hour at temperature of 500 oC, 700 oC and 900 oC. The X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM) and Impedance-Capacitance-Resistance-meter are used to find out the microstructure, morphology and electrical properties respectively. The results of the experiment showed that the carbon had a structure of amorphous, and as the semiconductor material the electrical conductivity was 5 x 10-5 S.cm-1 to 4.9 x 10-5 S.cm-1 increasing in accordance with the pyrolisis temperature. The morphology resembled to plaited mats constructed by porous fibers having width of 50 µm to 300 µm, thickness of 25 µm to 35 µm, and the porous size of 0.5 µm to 5 µm. This morphology enables carbon to be applied as a candidate for a basic material of the Proton Exchange Membrane Fuel Cell.Keywords: Carbon, Hibiscus fiber, Pyrolysis, Electrical conductivity.
THE EFFECT OF MEMBRANE THICKNESS OF HYDROCARBON COMPOSITE POLYMER TO FUEL CELLS PERFORMANCES Handayani, Sri; Dewi, Eniya Listiani
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

Polymer type’s fuel cell generator are depends on oxidant as fuels. For hydrogen and methanol fuel’s oxidant, there are proton exchange membrane fuel cell (PEMFC) and direct methanol fuel cell (DMFC)‘s type. Each type of fuel cells needs suitable membrane as electrolyte in order to get high density of proton transfer reaction. In this research the conductivity and water uptake of sulphonated polyether-ether keton (sPEEK) with silica modified composite hydrocarbon membrane in various thickness up to 100 μm were investigated. The selectivity of proton transfer reaction had been calculated. In summary, the ionic conductivity showed about 10-2 S.cm-1 to 2 S.cm-1 and water uptake about 30-45 (% w/w). In the thickness between 70 μm to 100 μm, the influence of the thickness membrane on ionic conductivity was increased by two times the ion conductivity. The sulphonated PEEK with silica modified composite membrane have clearly shown as a good candidate for DMFC applications with 90-100 μm thickness and for PEMFC’s is 70 μm.Keywords: Polymer electrolyte membrane, Sulphonated hydrocarbon polymer, Ionic conductivity.
ATOMIC DISTRIBUTION OF PtCo/C NANOPARTICLES AS INVESTIGATED BY X-RAY ABSORPTION SPECTROSCOPY Budiman, Abdul Hamid; Dewi, Eniya Listiani; Punwanto, Widodo Wahyu; Dalimi, Rinaldy; Hwang, Bing Joe
Jurnal Sains Materi Indonesia 2010: Desember 2010 - Edisi Khusus
Publisher : BATAN

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Abstract

X-Ray Absorption Spectroscopy (XAS) was utilized to deduce the structural parameters that can provide information on atomic distribution and extent of alloying as well as the surface population of bimetallic nanoparticles (NPs). In this study, we focused on PtCo/C NPs treated by CO with various of time. XAS measurement showed that this experiment is related to the Case 3, which is JPt < 100 % and JCo < 100 %, then both Pt and Co atoms are not preferred to be alloyed, and it indicates that a higher extent of Pt/Co atoms prefer only to a lesser extent alloying between Pt and Co atoms. If JCo > JPt, it appears that the core is rich in Pt atoms and shell is rich in Co atoms. On the contrary if JPt > JCo resulting in Co atoms are rich in the core and Pt atoms are rich in the shell. The XAS results reveal that the time of treatment influences the surface population hence the structure of the catalyst. Catalyst treated CO for 0, 3 and 5 hours leads to higher population of Pt on the core and Co was moved to the surface resulting to Pt rich in core Co rich in shell, while treated for 7 and 15 hours leads to higher population of Pt on the shell and Co on the core resulting to Pt rich in shell Co rich in core.Keywords: Atomic distribution, X-Ray Absorption Spectroscopy, Coordination number, Alloy extent.

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