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All Journal Elkawnie Jurnal Kimia Mulawarman Indonesian Journal of Chemistry Jurnal Inotera Jurnal Akademika Kimia Jurnal Natural Jurnal Akademika Kimia
BASUKI WIRJOSENTONO
Chemistry Department, Faculty Of Mathematics And Natural Science, Universitas Sumatera Utara, Jalan Bioteknologi No.1 Kampus USU, 20155, Medan
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics

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 1 
Biodegradasi Dari Penyalut Layak Makan Berbasis Pati Sagu Khairun Nisah; Basuki Wirjosentono
Elkawnie: Journal of Islamic Science and Technology Vol 1, No 1 (2015)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v1i1.519

Abstract

The experiment about the food to cauting decent from starch of sago using powder of bar sago palm as filler and glycerol as plastisizer has done. Biodegadation of to cover eat decent eith powder of bar sago palm as filler, was done by soil buriar test for 5 – 3 days. Mean while biodegadation in Aspergillus niger media was done for 3-5 days. The results of weight loss percentage showed that all to cover eat decent can be biodegadation rate. The biodegadability by soil burial test was more faster thant by Aspergillus niger fungi. Characterization of fungtional goups were done by FT – IR and the morphology was tested by SEM. Toxicity test using E.Coli in Nutrien Agar media at temperature 370C and incubation 48 hours showed that to cover eat decent not indivcatoin of anticeptic properties.
SIFAT TERMAL DAN KELARUTAN DARI CYCLIC LIQUID NATURAL RUBBER Leni Widiarti; Basuki Wirjosentono; Eddyanto Eddyanto
JURNAL KIMIA MULAWARMAN Vol 14 No 2 (2017)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Cyclic Liquid Natural Rubber (CLNR) is a cyclical natural rubber which has decreased molecular weight. Synthesis of Cyclic Liquid Natural Rubber (CLNR) can be done in a way that degradation after cyclization. Degradation after cyclization using Cyclic raw material Natural rubber (CNR), the degradation is done by using phenylhydrazine reagents with oxygen gas atmosphere with a flow rate of 2 LMenit-1 for 24 hours. CNR and CLNR thermal analysis by DSC, Tg results obtained amounted to 102.82 ° C and 103.67 ° C, Tc amounted to 362.45 ° C and 330.29 ° C and Tm mounted to 509.24 ° C and 440 , 00 oC. Of CNR and CLNR solubility test has a polarity index of 2.4 to 4.4 and from 2.4 to 4.4.
Penyelidikan Karakteristik Lapisan Diamond Film Pahat Karbida Terhadap Pembebanan Mekanik Pada Pembubutan Kering Fransnazoan Sitorus; Armasyah Ginting; Basuki Wirjosentono
Jurnal Inotera Vol. 1 No. 1 (2016): July-December 2016
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.229 KB) | DOI: 10.31572/inotera.Vol1.Iss1.2016.ID6

Abstract

Penelitian ini bertujuan untuk mengkarakterisasi lapisan diamond-film yang digunakan sebagai bahan pelapis pahat karbida khususnya bahan pelapis (diamond-film CVD), sehubungan dengan adanya laporan penelitian perihal kegagalan fungsi dari bahan pelapis pahat karbida yang digunakan pada proses pemesinan kering bahan non-ferro metal pada awal proses pemotongan berlangsung (initial wear). Kajian karakteristik lapisan diamond-film pahat dilakukan melalui pendekatan beban mekanik melalui proses pemesinan kering menggunakan bahan paduan aluminium 6061. Kondisi pemotongan yaitu v= 350 m/min; f= 0.15 mm/put; a= 1.5 mm pada fasa Initial-wear (tc= 1.736 min). Uji beban mekanik menggunakan bahan uji berkekerasan berbeda, Aluminium 6061 (53.3 HRB/95 HV) dan AISI 1070 (93.3 HRB/200 HV), hasil pengujian pada bahan uji Aluminium 6061 diperoleh keadaan Aus-abrasive VB= 0.070 mm, dan pada bahan uji AISI 1070 diperoleh keadaan Aus tepi VB= 0.250 mm, analisa menggunakan scanning electron microscope (SEM) dan energy dispersive analysis X-Ray spectroscopy (EDAX), hasil pengujian diperoleh sebaran unsur pelapis diamond-film pada bahan uji Aluminium 6061 terhadap kondisi pemotongan diperoleh keadaan unsur material pelapis diamond film masih signifikan. Kemudian pada bahan uji AISI 1070 terhadap kedua kondisi pemotongan diperoleh keadaan unsur material pelapis diamond-film signifikan. Dari hasil penelitian disimpulkan bahwa pendekatan beban mekanik tidak ditemukan peristiwa pengelupasan lapisan diamond-film pahat karbida, fenomena yang terjadi terhadap ketiga pendekatan yang dilakukan adalah peristiwa hilang bertahapnya sebagian volume material pelapis diamond-film yang melapisi material substrate akibat Aus pengikisan lapisan (abrasive-coating wear).
Electrical and Thermal Conductivity of Cyclic Natural Rubber/Graphene Nanocomposite Prepared by Solution Mixing Technique Vivi Purwandari; Saharman Gea; Basuki Wirjosentono; Agus Haryono; I Putu Mahendra; Yasir Arafat Hutapea
Indonesian Journal of Chemistry Vol 20, No 4 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (408.438 KB) | DOI: 10.22146/ijc.44791

Abstract

Thermal and electrical conductivity studies of Cyclic Natural Rubber nanocomposite with graphene 1 and 2 phr (G1 and G2) and modified 1 and 2 graphenes (mG1 and mG2) have been carried out. Graphene was activated with cetrimonium bromide (CTAB), was isolated from Sawahlunto coal (Bb) by the Hummer modification method. The nanocomposite was fabricated through the mixing solution method using Xylena as a solvent. The characterizations of nanocomposites which were performed by Fourier Transform Infrared (FT-IR) and X-Ray Diffraction (XRD) reveals an interaction between graphene, CTAB and the CNR matrix. Furthermore, Scanning Electron Magnetic (SEM) and Transmission Electron Microscopy (TEM) indicate the particle size to be smaller and particle distribution is more in accordance with CTAB. Thermal analysis of nanocomposites using Differential Scanning Calorimeter (DSC) showed an increase in thermal conductivity from 3.0084 W/mK to 3.5569 W/mK. Analysis of electrical conductivity using the Two-Point Probe shows 2 phr mG (mG2) capable of increasing electrical conductivity from 0.1170 × 10–4 S/cm to 0.2994 × 10-4 S/cm.
Morphology and thermal properties of polypropylene-montmorillonite nanocomposite using modified bentonite of Bener Meriah Aceh JULINAWATI JULINAWATI; BASUKI WIRJOSENTONO; EDDIYANTO EDDIYANTO; SAHARMAN GEA; ICHWANA RAMLI
Jurnal Natural Volume 20 Number 3, October 2020
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (326.979 KB) | DOI: 10.24815/jn.v20i3.15073

Abstract

Research on the use of modified bentonite from Bener Meriah Aceh to study the morphology and thermal properties of polypropylene-montmorillonite nanocomposite (PP-MMT) was carried out. Bentonite was isolated into nano-sized montmorillonite and modified with the addition of PP-g-MA as a compatibilizer and octadecylamine as a modifier of MMT. PP-MMT nanocomposite processing was carried out in an internal mixer at 180 oC with a time of 10 minutes, and a speed of 65 rpm. Based on the results of the TGA-DTA test, the modified bentonite from Bener Meriah Aceh with PP-g-MA and octadecylamine can improve the thermal properties of PP-MMT nanocomposite in a composition comparison of  PP; PP-g-MA; MMT is 85; 10; 5. The SEM test results also showed that exfoliation and intercalation had occurred of MMT at PP-MMT nanocomposite.
Effect of Variation of Moringa Leaf Extract (Moringa oleifera L.) on Antioxidant Activity of Edible Film CMC/Chitosan Rezky A. Zainuddin; Basuki Wirjosentono; Cut F. Zuhra
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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Abstract

The edible film is an alternative to using synthetic polymer products because it is non-toxic, biodegradable, increases food safety, and extends food shelf life. The purpose of this study was to see how the effect of adding Moringa leaf extract on the antioxidant activity of CMC/Chitosan edible film. This study consisted of two stages, the first stage was extracting Moringa leaves using ethanol, and the second stage was making edible film CMC/chitosan with the addition of variations of Moringa leaf extract (0.5%, 1%, 1.5%, and 2%). The results of the antioxidant activity test showed that the edible film with the best variation was EE with an IC50 value of 4.45 ppm which was categorized as very strong and physical properties such as absorption, solubility, and water vapor transmission were 72.19%, 92.04%, and 6.21 g/m2h.
Morphology and thermal properties of polypropylene-montmorillonite nanocomposite using modified bentonite of Bener Meriah Aceh JULINAWATI JULINAWATI; BASUKI WIRJOSENTONO; EDDIYANTO EDDIYANTO; SAHARMAN GEA; ICHWANA RAMLI
Jurnal Natural Volume 20 Number 3, October 2020
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v20i3.15073

Abstract

Research on the use of modified bentonite from Bener Meriah Aceh to study the morphology and thermal properties of polypropylene-montmorillonite nanocomposite (PP-MMT) was carried out. Bentonite was isolated into nano-sized montmorillonite and modified with the addition of PP-g-MA as a compatibilizer and octadecylamine as a modifier of MMT. PP-MMT nanocomposite processing was carried out in an internal mixer at 180 oC with a time of 10 minutes, and a speed of 65 rpm. Based on the results of the TGA-DTA test, the modified bentonite from Bener Meriah Aceh with PP-g-MA and octadecylamine can improve the thermal properties of PP-MMT nanocomposite in a composition comparison of  PP; PP-g-MA; MMT is 85; 10; 5. The SEM test results also showed that exfoliation and intercalation had occurred of MMT at PP-MMT nanocomposite.
Effect of Variation of Moringa Leaf Extract (Moringa oleifera L.) on Antioxidant Activity of Edible Film CMC/Chitosan Rezky A. Zainuddin; Basuki Wirjosentono; Cut F. Zuhra
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The edible film is an alternative to using synthetic polymer products because it is non-toxic, biodegradable, increases food safety, and extends food shelf life. The purpose of this study was to see how the effect of adding Moringa leaf extract on the antioxidant activity of CMC/Chitosan edible film. This study consisted of two stages, the first stage was extracting Moringa leaves using ethanol, and the second stage was making edible film CMC/chitosan with the addition of variations of Moringa leaf extract (0.5%, 1%, 1.5%, and 2%). The results of the antioxidant activity test showed that the edible film with the best variation was EE with an IC50 value of 4.45 ppm which was categorized as very strong and physical properties such as absorption, solubility, and water vapor transmission were 72.19%, 92.04%, and 6.21 g/m2h.
Co-Authors ., Julinawati Agus Haryono Armasyah Ginting Cut F. Zuhra Eddiyanto Eddiyanto Eddyanto Eddyanto Fransnazoan Sitorus I Putu Mahendra ICHWANA RAMLI Khairun Nisah Leni Widiarti Purwoko, Agus Rezky A. Zainuddin Saharman Gea Vivi Purwandari Yasir Arafat Hutapea