I Made ARCANA
Kelompok Keahlian Kimia Fisika dan Anorganik, FMIPA, Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung

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KARAKTERISASI DAN PEMBUATAN POLIURETAN DARI SERBUK KAYU MAHONI SEBAGAI POLIMER BIODEGRADABLE WIJAYA, Mohammad; ARCANA, I Made
Jurnal Ilmu dan Teknologi Hasil Hutan Vol 2, No 2 (2009): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.5 KB)

Abstract

Mahoni wood (Swietenia macrophylla King) contains holoseloluse and lignin. This research has been conducted to using lignin from  mahoni wood for made polyurethane  Isolate lignin is product isolation mahoni degradation with method increasing 4 gram isolate lignin into 150 ml ethylene glycol content 25 gram solution NaOH. The result of degradation used to synthesis polyurethane, then content of LT-PEG with methylen 4.4 difenil diisocyanaate (MDI) become polyurethane.  To identified isolate lignin and product degradation lignin has been conducted to characterized with UV and FTIR method. The result shows that the specified spectra at maximum wavelength at 280 nm and 248 nm. While result from FTIR spectra shows that spevtra at wavenumber 1296 cm-1 and 1249 cm-1 is shows of propile guaiasil group. The function group propel siringile. While lignin from kind at siirngile, while the spectra at 1354 cm-1. The result synthesis polyurethane to characterized by the mechanical properties analysis with Tensile tester machine. It is therefore mechanical properties shows that Tensile strength and Young modulus bigger wuth enhancing lignin of content into polyurethane but percentage elongation increase.   Keywords :  Mahoni wood, isolate lignin, degradation lignin, polyurethane
Structure and Properties of Polymers Prepared by Polymerization of 2,2-Dimethyl-1,3-Propandiol and ε-Caprolactone Monomer Arcana, I Made; Hasan, M.; Anggraini, Shinta Dewi; Febrianti, Asti Ardhyo; Ardana, Aditya
Journal of Mathematical and Fundamental Sciences Vol 41, No 2 (2009)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.196 KB) | DOI: 10.5614/itbj.sci.2009.41.2.2

Abstract

Poly(ε-caprolactone) (PCL) is very attractive synthetic polymer due to its properties, such as a high permeability, the lack of toxicity, and also biodegradability. However, it has limited application because of low melting point (60 °C), high crystallinity, and brittleness. The aim of the experiments is designed to improve the properties of PCL by formation of their polymers with 2,2-dimethyl-1,3-propandiol monomers with various chain length as a raw material to prepare poly(urethane-ester). These polymers were synthesized by a ring-opening polymerization of 2,2-dimethyl-1,3-propandiol and ε-caprolactone monomers in various composition in the presence of 1-hydroxy-3-chloro-tetraisobuthyldistanoxane as a catalyst. Polymers were characterized by analysis of functional groups (FTIR), microstructure (1H and 13C NMR), viscosity, hydroxyl number, and also melting point of polymers (DSC). Based on the structure analysis indicate that polymerization of 2,2-dimethyl-1,3-propandiol and ε-caprolactone monomers produced polymers with various molecular weights, which depend on the ratio of ε-caprolactone / 2,2-dimethyl-1,3-propandiol used in polymerization. The reactivity of CL monomer decreases to the active site of polymers with longer chain size. The melting points of polymers increase with the increasing of ε-caprolactone composition used in polymerization, whereas hydroxyl number decreases.
POLIMER BIODEGRADASI DAN APLIKASINYA Arcana, I Made
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Meningkatnya produksi polimer/bahan plastik sintetik disebabkan karena bahan plastik dapat digunakan pada berbagai aplikasi, baik bahan plastik untuk bidang kedokteran, farmasi, pertanian, dan bahan pengemas maupun bahan plastik untuk aplikasi material yang lebih maju seperti membran polimer elektrolit. Sampah plastik yang telah digunakan tersebut menjadi masalah yang sangat serius, karena tidak seperti polimer alam, sebagian besar polimer sintetik tidak dapat didegradasi oleh mikroorganisme yang ada di alam. Untuk mengatasi masalah tersebut telah dikembangkan suatu material yang dikenal sebagai polimer yang dapat terbiodegradasi (Biodegradable Polymers). Ada berbagai cara yang digunakan untuk mendapatkan polimer yang dapat terbiodegradasi di alam antara lain melalui biosintesis dan sintesis secara kimia polimer baru yang dapat terbiodegradasi, serta modifikasi polimer non biodegradasi melalui pembentukan poliblend dengan polimer biodegradasi, penambahan aditif pro-oksidan ke dalam polimer, dan modifikasi polimer alam untuk berbagai aplikasi. Dalam kesempatan ini akan disampaikan beberapa polimer biodegradasi yang dapat diperoleh dari sintesis secara kimia, modifikasi polimer non biodegradasi dengan polimer biodegradasi baik melalui pembentukan kopolimernya ataupun poliblendnya, modifikasi melalui penambahan aditif pro-oksidan dalam pembentukan polimer okso-degradasi, serta beberapa aplikasinya baik untuk bahan plastik pengemas maupun untuk material maju (Advanced Materials) terutama sebagai bahan membran polimer elektrolit untuk ap likasi sel bahan bakar dan sel baterai litium. Salah satu membran polimer elektrolit untuk aplikasi baterai litium diperoleh melalui modifikasi polimer alam seperti kitosan. Modifikasi kitosan dilakukan melalui penambahan gugus suksinat ke dalam kitosan menggunakan asam suksinat anhidrida, sedangkan membran polimer elektrolit dibuat dari kitosan suksinat dan garam litium perklorat digunakan sebagai garam ioniknya. Substitusi gugus suksinat pada kitosan dapat meningkatkan hantaran ionik membran dari 2,88 × 10 -6 S.cm -1 untuk kitosan murni, 5,06 x 10 -5 S.cm -1 untuk kitosan- Li5%, dan menjadi 8,04 x10 -2 S.cm -1 untuk kitosan suksinat-Li5%. Sebaliknya adanya gugus suksinat dalam kitosan cenderung menurunkan sifat mekanik dan sifat termal membran.
Green Synthesis of [EMIm]Ac Ionic Liquid for Plasticizing MC-based Biopolymer Electrolyte Membranes Ndruru, Sun Theo Constan Lotebulo; Wahyuningrum, Deana; Bundjali, Bunbun; Arcana, I Made
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 2 Year 2019 (SCOPUS and Web of Science Indexed, August 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.2.3074.345-357

Abstract

Lithium-ion batteries (LIBs) are favorable power source devices at the last two decades, owing to high energy density, rechargeable, long life cycle, portable, safe, rechargeable, good performance and friendly environment. To support their development, in this research has been successfully prepared polymer electrolyte membrane, a main component of LIBs, based on 1-ethyl-3-methylimidazolium acetate ([EMIm]Ac) ionic liquid-plasticized methyl cellulose/lithium perchlorate (MC/LiClO4). [EMIm]Ac ionic  liquid was easy synthesized by metathesis reaction between 1-ethyl-3-methylimidazolium bromide ([EMIm]Br) ionic liquid and potassium acetate (CH3COOK) at ambient temperature, for 1 hour. [EMIm]Ac ionic liquid was functional groups analyzed with Fourier Transform Infra-red (FT-IR) and structural analyzed with 1H-Nuclear Magnetic Resonance (NMR) and 13C-NMR. [EMIm]Ac ionic liquid-plasticized MC/LiClO4 biopolymer electrolyte membrane was prepared by casting solution, with [EMIm]Ac ionic liquid content, 0, 5, 10, 15, 20, 25, and 30% (w/w). Effect of 15% (w/w) [EMIm]Ac ionic liquid incorporation to MC/LiClO4 showed the best condition and selected as the optimum condition with conductivity, tensile strength, elongation break, and thermal stability of 9.160×10-3 S.cm-1, 24.19 MPa, 36.43%, ~256 and ~370 ºC, respectively. These results confirm that [EMIm]Ac ionic liquid can plasticize biopolymer electrolyte membranes of MC/LiClO4 to be appealing performances to fulfill the LIB’s separator requirement. Copyright © 2019 BCREC Group. All rights reserved 
Structure and Thermal Property of Poly(R,S)-B-Hydroxybutyrate Synthesized by Aluminoxane Catalyst. Arcana, I Made
Journal of Mathematical and Fundamental Sciences Vol 32, No 1 (2000)
Publisher : ITB Journal Publisher, LPPM ITB

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Abstract

Abstract. Poly(R,S)-B-hydroxybutyrate (PHB) was synthesized by ring-opening polymerization of racemic (R,S)-B-butyrolactone using tetraisobutyldialuminoxane (TIBAO) as catalyst. In previous studies, some factors or polymerization conditions such as polymerization suhue, polymerization time, nature of solvent, catalyst concentration, and modification of the catalyst system by water addition were varied to obtain optimal polymerization-results based on yield and molecular weight of polymers obtained. This study was emphasized on characterization of polymer by 13C NMR spectroscopy and Differential Scanning Calorimetry (DSC) to obtain informations about chemical structure and thermal properties of polymer obtained using tetraisobutyldialuminoxane catalyst. These analyses showed that tetraisobutyldialuminoxane catalyst produced partially stereoregular polymer depending on the quantity of water added to TIBAO catalyst. Extraction of polymer with acetyl-acetone (AcAc) or acetone separated the polymer into a soluble atactic fraction with amorphous structure and an insoluble isotactic fraction with crystalline structure. Addition of a certain quantity of water to the catalyst and treatment of polymer by solvent extraction have resulted in an increase in stereoregularity and crystallinity of polymer.
SINTESIS SELULOSA ASETAT DARI TANDAN KOSONG KELAPA SAWIT DAN SIFATNYA SEBAGAI MEMBRAN POLIMER ELEKTROLIT PADA BATERAI ION LITIUM Nurhadini, Nurhadini; Arcana, I Made
JURNAL KIMIA MULAWARMAN Vol 15 No 2 (2018)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.373 KB) | DOI: 10.30872/jkm.v15i2.612

Abstract

Biodegradable polymer electrolyte utilization on lithium ion battery is increasingly considered to prevent any waste. This study was conducted to synthesis cellulose acetate from oil palm empty fruit bunch and its properties as polymer electrolyte membranes on lithium ion battery. This study was done by extracting cellulose from oil palm empty fruit bunch. That cellulose was acetylated become cellulose acetate and characterized its functional group. Further, polymer electrolyte was synthesized with composition 25/60/15(%b/b) (SAS/PEO/LiClO4). The properties of polymer electrolyte membranes were characterized by analysis thermal properties, ionic conductivity and mechanical properties. Based on functional group data, synthetic cellulose acetate had similar the main functional group with commercial cellulose acetate. Synthetic cellulose acetate contained 27% acetyl with 1,4 substitution degree. Analysis thermal properties showed that the decomposition of SAS/PEO/LiClO4 polymer electrolyte membranes was started above 260oC.  The ionic conductivity 10,81 x 10-4 S/cm of  these polymer electrolyte membranes was 10,81 x 10-4 S/cm. Analysis of mechanic properties were 0,05 MPa stress, 14,23 MPa elongation and 0,35 MPa Modulus Young. SAS/PEO/LiClO4 polymer electrolyte membranes had higher ionic conductivity than SAK/PEO/LiClO4 polymer electrolyte membranes. However, SAS/PEO/LiClO4 polymer electrolyte membranes had lower thermal and mechanic properties than SAK/PEO/LiClO4 polymer electrolyte membranes.  
KAJIAN STATISTICAL DAN COST EFFICIENCY DALAM PENENTUAN GUGUS SAMPEL BLOK SENSUS TERBAIK (Studi Kasus: Sampling Design Susenas-2015 di Kabupaten Natuna) Ningsih, Wiwik Andriyani Lestari; Arcana, I Made
MEDIA STATISTIKA Vol 11, No 2 (2018): Media Statistika
Publisher : Department of Statistics, Faculty of Science and Mathematics, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.295 KB) | DOI: 10.14710/medstat.11.2.93-105

Abstract

Two aspects of efficiency that should be considered in applying sampling design of a survey are statistical efficiency and cost efficiency. Efficiency in statistical aspect improves precision of estimators obtained by the survey data, whereas efficiency in cost aspect provides an economic survey. The purpose of this researchis to evaluate the both efficiencies in all possible census blocks (CBs) sample setand to identify the best CBs sample set in the 2015 National Socio-Economic Survey (Susenas). Therefore, a computer program for calculating statistical, and cost efficiency aspects was developed in this research to determine the best sampel set of  CBs among all possible sampel set of CBs based on sampling design of the 2015 Susenas implemented in Natuna District, Kepulauan Riau Province. The best possible sample set of CBs is determinedby considering statistical efficiency aspect, cost efficiency aspect, as well as combination of those two aspects. The result showed that the best sample set of CBs on statistical efficiency aspect provided the CBs sample set having minimum value of RSE index; evaluation on cost efficiency aspect provided the best CBs sample set having minimum value of total cost esimated using the total score of accessibility index; and evaluation on both efficiency aspects provided the best CBs sample set having minimum value of RSE index and minimum value of total score of accessibility index. Keywords: sampling design, all possible samples, statistical efficiency, cost efficiency
Mahoni wood (Swietenia macrophylla King) contains holoseloluse and lignin. This research has been conducted to using lignin from  mahoni wood for made polyurethane  Isolate lignin is product isolation mahoni degradation with method increasing 4 gram isolate lignin into 150 ml ethylene glycol content 25 gram solution NaOH. The result of degradation used to synthesis polyurethane, then content of LT-PEG with methylen 4.4 difenil diisocyanaate (MDI) become polyurethane.  To identified isolate li WIJAYA, Mohammad; ARCANA, I Made
Jurnal Ilmu dan Teknologi Hasil Hutan Vol 2, No 2 (2009): Jurnal Ilmu Teknologi Hasil Hutan
Publisher : Departemen Hasil Hutan, IPB

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

Abstract

Mahoni wood (Swietenia macrophylla King) contains holoseloluse and lignin. This research has been conducted to using lignin from  mahoni wood for made polyurethane  Isolate lignin is product isolation mahoni degradation with method increasing 4 gram isolate lignin into 150 ml ethylene glycol content 25 gram solution NaOH. The result of degradation used to synthesis polyurethane, then content of LT-PEG with methylen 4.4 difenil diisocyanaate (MDI) become polyurethane.  To identified isolate lignin and product degradation lignin has been conducted to characterized with UV and FTIR method. The result shows that the specified spectra at maximum wavelength at 280 nm and 248 nm. While result from FTIR spectra shows that spevtra at wavenumber 1296 cm-1 and 1249 cm-1 is shows of propile guaiasil group. The function group propel siringile. While lignin from kind at siirngile, while the spectra at 1354 cm-1. The result synthesis polyurethane to characterized by the mechanical properties analysis with Tensile tester machine. It is therefore mechanical properties shows that Tensile strength and Young modulus bigger wuth enhancing lignin of content into polyurethane but percentage elongation increase.   Keywords :  Mahoni wood, isolate lignin, degradation lignin, polyurethane