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INDONESIA
Jurnal Kimia Terapan Indonesia
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 08532788     EISSN : 25277669     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 17, No 1 (2015)" : 8 Documents clear
PENGARUH SENYAWA SILAN TERHADAP SIFAT MEKANIK MATERIAL PELAPIS PADUAN HIBRID EPOKSI TERMODIFIKASI POLIURETAN Savitri Savitri; Evi Triwulandari; Agus Haryono; O A Syahputra
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (847.129 KB) | DOI: 10.14203/jkti.v17i1.19

Abstract

Preparation of hybrid coating material from modified epoxy polyurethane (ETP) and silan (Si) has been done. Epoxy and polyurethane were modified with silan using γ-Glisidoksil propil trimetoksisilan (GPTMS) and γ-aminopropyl triethoxysilane (γ-APS) and also dibutyltindilaurate (DBTL) as catalyst. Fourier Transform Infrared (FTIR) characterization indicated that the hybrid coating material has been formed. The results of the analysis of NCO percent and conversion rate of isocyanates (α) also verified that the ETP-Si hybrid coatings have been formed. The addition 30% of silane as Si-O group indicated the rest of NCO percent was the lowest for hybrid coating material with polyurethane concentration of 5% and 10. The composition of ETP5% - Si 30% was the optimum composition from the ETP-Si hybrid coating material based on the mechanical analysis.Key words: hybrid coating, polyurethane, epoxy, silane, ETP – Si
CHEMICAL CATALYTIC AND BIOCATALYTIC PROCESS OF CLOVE OIL DERIVATIVES REVIEW Silvester Tursiloadi; Nina Artanti; Anny Sulaswatty
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (826.256 KB) | DOI: 10.14203/jkti.v17i1.24

Abstract

In 2011, Indonesian clove oil supply reached about 75 % (4,500 of 6,000 tons) of the world market. Utilization of clove oil and clove oil derivatives in aromatic chemical industry primarily as a mixture or additive of fragrances in the daily consumed product, such as perfumes, skin care products, deodorant, soap, shampoo, detergent, besides it is also used as an ingredient in the production of synthetic vanilla.  The content of eugenol as the main compound in the essential oil in the clove flower, flower stalk and leaf have a range of 90-95 %, 83-95 % and 82-87 % respectively.  The compounds content in clove oil is divided into two categories, phenolics (eugenol) and non-phenolic (beta-caryophyllene) that can be derivatized with various chemocatalytic and biocatalytic processes. Separation of the compounds in clove oil can be conducted by adding NaOH with repeated distillation. This process produces two layers product, the first layer contains eugenol and NaOH, while the second layer contains beta-caryophyllene. Derivatization of eugenol are conducted to produce various products such as vanilla, eugenyl ether, methyl ether eugenyl, eugenyl ethyl ether, eugenyl acetate, eugenyl cinnamate, dimmer eugenol and eugenyl benzoate, whereas derivatization of beta-caryophyllene are conducted to produce products such as caryophyllene oxide, kobusan, glycols, alcohols caryophyllene, β-caryolanylformate and kovanilformate, klovanildiformate, caryophyllene ketol.  Biocatalysis or biotransformation can be defined as the use of biological systems (intact cells, cell extracts or isolated enzymes) to catalyze the conversion of a compound into another. Besides the common chemocatalysis system for derivatization of clove oil and clove oil compound such as eugenol into other compounds some biocatalysis systems were also described in this paper.Keywords: Clove oil, eugenol, beta-caryophyllene, derivatization, chemical catalysis, biocatalysis
PENGUJIAN STABILITAS SEDIAAN LUKA BAKAR BERBAHAN BAKU AKTIF KITOSAN/EKSTRAK PEGAGAN(CENTELLA ASIATICA) Eriawan Rismana; Idah Rosidah; Olivia Bunga; Prasetyawan Yunianto; Erna Erna
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (419.395 KB) | DOI: 10.14203/jkti.v17i1.20

Abstract

The evaluation of wound-healing formula stability with active substance chitosan/Centella asiatica extract has been examined. The stability test was evaluated including physical, chemical and microbiology properties. The stability of physical property was observed by organoleptic parameters such as shape of gel, color, odor, homogeneity and weight of samples, while the stability of chemical property was studied by determination of pH and HPLC chromatogram profile. Meanwhile the stability of microbiology property was determined by contents by microbe and fungi contaminant. The results of evaluation showed that the wound-healing formula had a good stability for all properties after storage at room temperature for 24 weeks and 40 oC/75 % RH for 12 weeks.Keywords: Wound-healing formula, chitosan, Centella asiatica extract, evaluation, stability
PERANCANGAN DAN PEMBUATAN DIVAIS SENSOR GAS CO BERBASIS INDIUM TIMAH OKSIDA (ITO) DENGAN TEKNOLOGI LAPISAN TIPIS Slamet Widodo; Goib Wiranto
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.964 KB) | DOI: 10.14203/jkti.v17i1.21

Abstract

In this paper it will be described the design and manufacturing of microdevice to be used as platform for Carbon monoxide (CO) gas sensor based on indium tin oxide (ITO). The device has been designed on silicon substrate with an active area of 3x3 mm2 , and consisted of bonding pad, heater, electrode, and temperature sensor components. The minimum feature size used is 50 microns, as allowed by the capability of photolithographic process. The formation of microdevice structure has been done mainly using lift-off technique on platinum (Pt) layer, which was deposited by DC sputtering with aluminium (Al) as sacrificial layer. The overall chip dimension is not more than 5x5 mm2.  The measurement conducted to study the resistance versus temperature characteristics has shown  that the heater and temperature sensor elements have functioned as expected, in which their resistances change linearly with an increase in substrate temperature between 20 – 200 oC. The range of increase in resistance values for the heater is 500 – 1000 ohm, whereas for the temperature sensor is 100 – 300 ohm.Keywords: Microdevices, lift-off process, sputtering, electrode, heater, gas sensor, ITO, CO gas.
PENGARUH 1,4-BUTANDIOL SEBAGAI POLIOL PADA MODIFIKASI EPOKSI MENGGUNAKAN POLIURETAN Muhammad Ghozali; Agus Haryono; Asep Handaya Saputra; Evi Triwulandari
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.708 KB) | DOI: 10.14203/jkti.v17i1.17

Abstract

Corrosion is a natural phenomenon causing degradation value and function of material. The use of paints and polymer coatings is the most popular method to protect material against corrosion. Polymer coatings used was an epoxy-based organic resin and polyurethane. Generally, those coating materials were used separately. This study carried out the modification of epoxy with polyurethane in order to obtain coating materials as a combination of epoxy and polyurethane. Expectedly, the chemical reaction between epoxy coating-material and polyurethane could improve the characteristics of the obtained coating materials. Synthesis of polyurethane-modified epoxy with 1,4-butanediol as the polyol (ETP-BTD) was conducted by reacting epoxy resin, tolonate and 1,4-butanediol simultaneously at 50 oC for 30 min with dibutyltindilaurate as catalyst. Functional group analysis of ETP-BTD was performed by Fourier Transform Infra Red (FTIR), tensile strength by Ultimate Testing Machine (UTM), adhesion by ASTM D4541 Portable Pull-off Adhesion Testers, water vapor transmission rate by ASTM E96 Desiccant Method and thermal stability was studied using Thermogravimetric Analysis (TGA). The FTIR analysis results showed that there are urethane bonds at 1716-1690 cm-1. These results showed that modification of epoxy using polyurethane increased the tensile strength and adhesion, and also decreased the water vapor transmission rate of epoxy. Keywords: epoxy, modification, polyol, polyurethane, 1.4-butanediol
SYNTHESIS AND PROPERTIES OF ETHOXYLATED GLYCEROL MONOOLEATE AS PALM OIL BASED NONIONIC SURFACTANTS Indri Badria Adilina; Egi Agustian; Yenny Meliana; Anny Sulaswatty
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (438.511 KB) | DOI: 10.14203/jkti.v17i1.22

Abstract

Palm oil based nonionic surfactants were synthesized by reacting glycerol monooleate with ethylene oxide at 80 ºC in the prescence of an alkaline catalyst. Purification of the products was conducted by use of acetic acid and black carbon which gave ethoxylated products (EGMO) with a higher level of viscocity and greater solubility in water. Physical and chemical properties of the product such as surface activity, cloud point, acid value, ester value, hydroxyl value, and hydrophilic-lipophilic balance was also determined and results varied depending on the reagent molar ratio. The synthesized EGMO were soluble in water and therefore show potential use as surface active agents in personal care and cosmetic products.Keywords:   nonionic surfactant, ethoxylation, glycerol monooleate, palm oil
VALIDASI METODE ANALISIS POLISIKLIK AROMATIK HIDROKARBON (PAH) DALAM SEDIMEN DI SEKITAR PANTAI MAKASSAR Muhammad Syahrir; Nurul Hidayat Aprilita; Nuryono Nuryono
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (285.212 KB) | DOI: 10.14203/jkti.v17i1.18

Abstract

Validation of  analysis  method of PAH have been done in marine sediment of Macassar Coast by Gas Chromatography (GC-FID). Validation of method include:  limit of detection (LoD), limit of quantification (LoQ) and linearity range. The results of validation method of 7 types PAHs (Naphtalene, Acenaphtene, Penanthrene, Fluoranthene, Pyrene, Benzo (a) Anthracene and perylene) give  a  linearity  range between 0.5 to 20 ppm with an average linearity approaches a value of 1. LoD for  Naphtalene; Acenaphthene; Penanthrene; Fluoranthene; Pyrene; Benzo (a) Anthracene; and Perylene are  3.541; 0.208; 1,736; 1.737; 1,738; 12.124; and 2,128 ppm, respectively. LoQ for Naphtalene; Acenaphthene; Penanthrene; Fluoranthene; Pyrene; Benzo (a) Anthracene; and Perylene are  11,803; 0.695; 5.786; 5.786; 5.788; 5.794; 7.0796 and 7.092 ppm, respectively. Limit of detection (LoD), limit of quantification (LoQ), linearity and linear range can be used to determine the concentration of PAH in sediment samples.Keywords: Validation Method, Concentration, PAH, Sediments
PREPARASI CONTOH UJI PROFISIENSI UNTUK IDENTIFIKASI SENYAWA KIMIA BERBAHAYA Evita Boes
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (620.877 KB) | DOI: 10.14203/jkti.v17i1.23

Abstract

The sample of proficiency test for hazard chemical compounds in organic and water sample has been made to identify hazard chemical compounds. Here, various matrix was added to these hazard chemical compound. The organic sample derived from organic waste added with dichloromethane as the solvent, undecane 100 µl/mL, 1,2-dimethylbenzene 12 µl/mL, diesel  100 µl/mL and tributhyl phosphate 10,02 µg/mL, whereas water sample derived from  water waste added with magnesium sulfate heptahydrate 120 µg/mL, sodium carbonate anhydrous 106 µg/mL, sodium sulfate anhydrous 284 µg/mL, calsium chloride  dyhidrate 222 µg/mL, dikhloromethane 2,5 µl/mL, polyethylene glycol 505,4 µg/mL, 3,5 dihydroxytoluene 10,05 µg/mL and α methyl-α-propyl succinimide 10,01 µg/mL. Hazard chemical compounds  that being added are Bis (3-methylbutyl) ethylphosphonate 10,04±0,31 µg/mL, Bis (2-chloroethyl) methylamine  20,59±0,14 µg/mL for organic sample and Pinacolyl methylphosphonate 9,80±0,18 µg/mL and Triethanolamine 14,84±0,10 µg/mL for water sample.  Homogeneity and stability are determined quantitatively using  GC-FPD (P-mode) and GC-FID with calibration curve using internal standard dibuty butylphosphonate, 2,6-dimethylphenol, dibutylphosphate and Bis (2-hydroxypropyl) aminoethanol with Relative Standard Deviation (RSD)  8,10 % and 12,40 µg/mL for Bis (3-methylbutyl) ethylphosphonate and 3,46 % and 14,19 µg/mL for Bis (2-chloroethyl) methylamine and 2,22 % and 11,28 µg/mL for Pinacolyl methylphosphonate and 2,70 % and 11,47 µg/mL for Triethanolamine.  Relative Standard Deviation is a homogeneity value with requirements below 20 % and stability is a degradation result which value is less than 30 %.Keywords: hazard chemical compounds, proficiency test, homogeneity, stability, relative standard deviation

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