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Jurnal Teknik Kimia USU

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Published by TALENTA PUBLISHER

ISSN : - EISSN : 23374888 DOI : https://doi.org/10.32734/jtk.v11i1

Core Subject : Science, Social, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

Jurnal Teknik Kimia USU merupakan jurnal elektronik yang mempublikasikan karya ilmiah di bidang teknik kimia yang diterbitkan oleh Departemen Teknik Kimia, Fakultas Teknik, Universitas Sumatera Utara. Jurnal ini tidak terbatas pada mahasiswa dan dosen Universitas Sumatera Utara, tetapi terbuka untuk mahasiswa, dosen dan peneliti dari instansi lain.

Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)

Articles 337 Documents

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PENGARUH ASAM STEARAT TERHADAP SIFAT KETEGUHAN PATAH/MODULUS OF RUPTURE PAPAN PARTIKEL TERMOPLASTIK BEKAS BERPENGISI TEMPURUNG KELAPA Muh. Hendra S Ginting; Rosdanelli Hasibuan
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The utilization of former thermoplastic and coconut shell as particle board is one way to reduce plastic waste packaging, the ratio of the former as a thermoplastic matrix and coconut shells as fillers 60:40. Purpose of this study was to determine the effect of stearic acid on properties of modulus of rupture former thermoplastic particle board filler of coconut shell. Method of shell particle board manufacturing using the extruder, starting with the modification of coconut shell particles (size 80 mesh) with stearic acid (0 g, 3 g, 6 g and 9 g in 60 ml of ethanol ) and then dried in an oven at a temperature 70oC . Matrix and coconut shell ( 60:40 ) mixed in the extruder and then printed with hot press at a temperature of 170oC, until forming particle board with a size of 200 mm x 200 mm x 10 mm. Particle board analyzed the modulus of rupture in accordance with SNI 03-2105-2006. The results showed an increase in modulus of rupture properties. The modulus of rupture is 37.402 MPa greatest.

SIFAT-SIFAT MEKANIK KOMPOSIT POLIPROPILENA BERPENGISI ABU PEMBAKARAN BIOMASSA KELAPA SAWIT Danil Tarmizi; Kartini Noor Hafni; A. Haris Simamora
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This study aimed to determine the effect of palm oil fuel ash composition of the mechanical properties of polypropylene composites. Composites made by extrusion and injection molding method by mixing polypropylene and palm oil fuel ash with filler composition, respectively 10, 15, and 20 (% w/w). Mechanical properties which tested are tensile strength, elongation at break, and impact strength. The results obtained from the study is the addition of filler palm oil fuel ash in polypropylene composites decrease the mechanical properties of the composites, such as tensile strength, elongation at break, and impact strength.

KARAKTERISTIK FOURIER TRANSFORM INFRA RED DAN KEKUATAN BENTUR KOMPOSIT POLIESTER TAK JENUH BERPENGISI ABU SEKAM PADI PUTIH Caroline Oktaviana Hutagalung; Maulida
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

This study was aimed to investigate the effect of white rice husk ash as filler in Fourier Transform Infra Red (FTIR) caractheristic and impact strength of polyester composites. The composites were made with open mixing method by mixing unsaturated polyester with white rice husk ash with the composition of each fillers of 5,10, 15, and 20 % (w/w) then added with 1% methyl ethyl ketone peroxide as catalizer. The parameters which was carried on the prepared samples was characteristic of FTIR and impact strength. It was found that impact strength increased at each of composition of fillers white rice husk ash (WRHA). The optimum value of unsaturated polyester composite filled WRHA are 7031 J/m2 and 8297,333 J/m2 for particle size maximum 100 and 250 mesh.

KAJIAN AWAL PEMBUATAN FILM PLASTIK (BAHAN PLASTIK PENGEMAS) DARI PATI BATANG UBI KAYU Harrison Situmorang; M. Hendra S. Ginting
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Starch plastic films made from cassava stem starch by using glycerol as plasticizer and acetic acid as a catalyst gelatinized at 75 °C for 15 minutes. Starch weight, water volume, glycerol volume, and acetic acid volume were varied. The variation conditions of 3 ml of acetic acid volume (3:10 w/w) and 2 ml of glycerol volume (1:4 w/w) gave the best of tensile strength and elongation at break analysis. While at water volume variation, the tensile strength value is inversely proportional to the elongation at break. In FTIR analysis found that α-1,6 glycosidic (1010 cm-1) spectrum disappears as the effect of acetic acid presence, while the spectrum of α-1,4 glycosidic, COH, C=O, and OH shifted as the plasticization effect.

KAJIAN AWAL PEMBUATAN PUPUK CAIR ORGANIK DARI EFFLUENT PENGOLAHAN LANJUT LIMBAH CAIR PABRIK KELAPA SAWIT (LCPKS) SKALA PILOT Fristyana Sosanty Lubis, Irvan; Dedy Anwar; Basril Amirza Harahap; Bambang Trisakti
Jurnal Teknik Kimia USU Vol. 3 No. 1 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The objective of this study is to design an organic liquid fertilizer manufacturing process from palm oil mill effluent (POME) at pilot scale. Materials used were effluent from further processing of biogas fermentation from POME and starter (mixture of molasses, yeast and effective microorganism). Variables measured were total solid (TS), volatile solid (VS), total suspended solid (TSS), volatile suspended solid (VSS), and chemical oxygen demand (COD), in addition, analysis content of liquid fertilizers was performed. The research consisted of production of starters and fermentation process. Loading rate was started from hydraulic retention time (HRT) 2,500 days and bioreactor performance was observed at HRT 100, 90 and 80 days. The results showed that COD concentration of bioreactor effluent decreased from 8,600 to 1,580 mg/l and from analysis content, liquid fertilizers are composed of nitrogen 0.14%, P2O5 0.05%, K2O 0.07%, MgO 0.01%, CaO 0.001mg/l, C-Organic 0,12%, and C/N Ratio 0.86.

EFFECT OF EPOXIDIZED NATURAL RUBBER AS A COMPATIBILIZER IN SILICA-FILLED STYRENE BUTADIENE RUBBER COMPOUND Indra Surya; Siswarni MZ
Jurnal Teknik Kimia USU Vol. 3 No. 2 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

By using a semi-efficient vulcanization system, the effect of Epoxidized Natural Rubber (ENR) as a compatibilizer in silica-filled Styrene Butadiene Rubber (SBR) compound was carried out. The ENR was incorporated into the silica-filled SBR compound at 5.0 and 10.0 phr. An investigation was carried out to examine the effect of ENR on cure characteristics and tensile properties of the silica-filled SBR compound. It was found that ENR gave enhanced cure rate to the silica-filled SBR compound. ENR also exhibited a higher torque difference, tensile modulus, and tensile strength up to 10.0 phr. The study of rubber - filler interaction proved that the addition of ENR to the silica-filled SBR system improved the rubber - filler interaction.

PENGARUH PENAMBAHAN BERBAGAI AKTIVATOR DALAM PROSES PENGOMPOSAN SEKAM PADI (Oryza sativa) Irvan; Permata Mhardela; Bambang Trisakti
Jurnal Teknik Kimia USU Vol. 3 No. 2 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Composting process of rice husk (Oryza sativa) by adding various activators have been carried out in LPPM Training Center, University of Sumatera Utara. The purpose of this study was to compare the effect of variation of slurry and bacteria (yeast and EM4) on rice husk composting results. The parameters observed were changes in temperature, water content, C/N ratio, and pH. At the end of the composting results showed that the addition of slurry, yeast and EM4 can lower the temperature and C / N ratio, and with the addition of yeast and 2 liters of slurry can speed up the process of decomposition of compost.

EKSTRAKSI PIGMEN ANTOSIANIN DARI KULIT BUAH NAGA MERAH (Hylocereus polyrhizus)
Jurnal Teknik Kimia USU Vol. 3 No. 2 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Extraction of anthocyanin pigments from the red pitaya’s peel (Hylocereus polyrhizus) has been done. Anthocyanin pigment from the red pitaya’s peel (Hylocereus polyrhizus) can be used as an alternative for sinthetys dye. Extraction of anthocyanin pigments in this experiment is using maceration method. There are three independent variables used in this experiment, they are the type of solvent (distilled water, 95% ethanol, ethyl acetate and 10% citric acid), solvent ratios (1:2, 1:3 and 1:4,) and the time of extraction process (1, 2 and 3 days). This experiment aims to determine the right type of solvent, better solvent ratio and better extraction time that used to get anthocyanin pigments from red pitaya’s peel. The measurements in this experiment are based on the pH value, the absorbance value and anthocyanin pigment yield. The experimental results shows that the levels of anthocyanin pigments of red pitaya’s peel dissolved in a solvent mixture of distilled water plus 10% citric acid produce the highest level of anthocyanin pigment yield is 62.68% at pH 2 and the extraction time are 3 days.

KARAKTERISASI POLIMER KONDUKTIF POLIPIROL BERPENGISI SERBUK BAN UNTUK MENDETEKSI KONDUKTIVITAS MINYAK Satriaji Sudigdo; Rizky Dharmawan; Hamidah Harahap
Jurnal Teknik Kimia USU Vol. 3 No. 2 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Conductive polymer sensor based polypyrrole (ppy) and tire dust and 1,4-methyl-pyrrolidinone was made by using polymerization process. The polymerization process was prepared at temperature 100°C in boiling water for 30 minutes. Conductive polymer sensor is undergone several type of analysis including electrical conductivity, Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR),and X-Ray Diffraction (XRD). The test used some kind of oil (palm oil,corn oil, diesel, and engine oil). The conductivity test result shows that sensor-4 (contain 20 phr of tire dust) in 80°C at 30 minutes had the highest conductivity. Scanning Electron Microscopy result shows the rough surface and well dispersed of tire dust in polypyrrole/tire dust blends. The XRD analysis shows the Face Centered Cubic (FCC) crystallographic structure of the sensor. The oil conductivity test shows that the corn oil is more reactive than others.

EKSTRAKSI PIGMEN ANTOSIANIN DARI KULIT RAMBUTAN (NEPHELIUM LAPPACEUM) DENGAN PELARUT METANOL
Jurnal Teknik Kimia USU Vol. 3 No. 2 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Rambutan fruit (Nephelium lappaceum) is a kind of tropical fruits which come from Malaysia and Indonesia. Their red coloured rinds have not used yet effectively and the red coloured may be due to anthocyanin that can be used for natural colours. The purpose of this research is to know the optimal conditions of the extraction of anthocyanin, they are particle size of rambutan rind, temperature and extraction time. Analysis of the anthocyanin use spectrophotometer UV-Vis to detect the wavelength and the absorbance of the anthocyanin. The best conditions are rambutan rind milled by blender at temperature 50 0C and extraction time for 6 hours. These conditions give the highest color intensity having 1,6103 of maximal absorbancy, 55,7659 mg/mL of anthocyanin concentration and 0,2788% of rendement.

Page 10 of 34 | Total Record : 337

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Home Page

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Contact Name Rondang Tambun

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Rondang Tambun

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rondang@usu.ac.id

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+6281263166850

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rondang@usu.ac.id

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Departemen Teknik Kimia, Fakultas Teknik, Universitas Sumatera Utara Jl. Almamater Kampus USU, Medan

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