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IMPREGNASI REAKTIF KAYU KELAPA DENGAN PLASTIK POLISTIRENA SERTA PENYEDIAAN KOMPOSIT POLISTIRENA MENGGUNAKAN PENGUAT SERBUK KAYU KELAPA Suharty, Neng Sri; Wirjosentono, Basuki
Alchemy Jurnal Penelitian Kimia Vol 4, No 2 (2005)
Publisher : Alchemy Jurnal Penelitian Kimia

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Kayu kelapa (KK) dapat diperbaiki kualitasnya dengan teknik impregnasi reaktif dengan larutan resin polistirena (PS) bekas termodifikasi asam akrilat (AA). Proses impregnasi dilakukan dalam impregnator tertutup pada suhu kamar dengan konsentrasi larutan resin optimum 20% selama 72 jam. Kualitas KK terimpregnasi dikarakterisasi menggunakan pengujian mekanis modulus patah (MOR), rapat massa, analisis termal diferensial (DTA), analisis permukaan dengan scanning elektron mikroskop (SEM) dan spektroskopi infra merah (FTIR). Setelah diimpregnasi kualitas KK meningkat dari kelas III menjadi kelas II/I,menurut kekuatan kayu Standar Nasional Indonesia (SNI 03 3527 â 1994). Penyedian secara reaktif komposit PS bekas teermodifikasi AA menggunakan 30% penguat serbukkayu kelapa (SKK) dapat meningkatkan harga kekuatan tariknya.

PENINGKATAN SIFAT MEKANIK DAN TERMAL KAYU KELAPA SAWIT DENGAN TEKNIK KOMPREGNASI REAKTIF ., Nurfajriani; Hutabarat, Wesly; ., Thamrin; Wirjosentono, Basuki; Gea, Saharman
JURNAL PENELITIAN SAINTIKA VOL 15, NO 2 (2014): JURNAL PENELITIAN SAINTIKA
Publisher : JURNAL PENELITIAN SAINTIKA

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Characterization of Oil Palm Trunks (OPT) in height rod different OPT that compregnated with polystyrene resin modifications have been done, polystyrene resins modified with acrylic acid and benzoyl peroxide incorporated into the OPT pore size 15x2x2 cm3 shaped beam that is placed in the compregnator has been modified with -5 atm pressure for 15 minutes. Based on the tensile tests conducted showed that the optimum mechanical properties of the OPT on the bottom of the stem height. with the addition of 20% resin. Similarly, the thermal properties OPT marked increases with increasing temperature degradation of OPT compregnated modified polystyrene resin at a concentration of 20%. From the above two tests showed that OPT improved quality of prior treatment compregnation, analysis of thermal degradation by using Thermogravimetry

PENINGKATAN SIFAT MEKANIK DAN TERMAL KAYU KELAPA SAWIT DENGAN TEKNIK KOMPREGNASI REAKTIF ., Nurfajriani; Hutabarat, Wesly; ., Thamrin; Wirjosentono, Basuki; Gea, Saharman
JURNAL PENELITIAN SAINTIKA Vol 15, No 2 (2014): SEPTEMBER 2014
Publisher : JURNAL PENELITIAN SAINTIKA

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Characterization of Oil Palm Trunks (OPT) in height rod different OPT that compregnated with polystyrene resin modifications have been done, polystyrene resins modified with acrylic acid and benzoyl peroxide incorporated into the OPT pore size 15x2x2 cm3 shaped beam that is placed in the compregnator has been modified with -5 atm pressure for 15 minutes. Based on the tensile tests conducted showed that the optimum mechanical properties of the OPT on the bottom of the stem height. with the addition of 20% resin. Similarly, the thermal properties OPT marked increases with increasing temperature degradation of OPT compregnated modified polystyrene resin at a concentration of 20%. From the above two tests showed that OPT improved quality of prior treatment compregnation, analysis of thermal degradation by using Thermogravimetry

PENINGKATAN SIFAT MEKANIK DAN TERMAL KAYU KELAPA SAWIT DENGAN TEKNIK KOMPREGNASI REAKTIF ., Nurfajriani; Hutabarat, Wesly; ., Thamrin; Wirjosentono, Basuki; Gea, Saharman
JURNAL PENELITIAN SAINTIKA Vol 14, No 2 (2014): SEPTEMBER 2014
Publisher : JURNAL PENELITIAN SAINTIKA

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Characterization of Oil Palm Trunks (OPT) in height roddifferent OPT that compregnated with polystyrene resin modificationshave been done, polystyrene resins modified with acrylic acid and benzoyl peroxide incorporated into the OPT pore size 15x2x2 cm3 shaped beam that is placed in the compregnator has been modified with -5 atm pressure for 15 minutes. Based on the tensile tests conducted showed that the optimum mechanical properties of the OPT on the bottom of the stem height. with the addition of 20% resin. Similarly, the thermal properties OPT marked increases with increasing temperature degradation of OPT compregnated modified polystyrene resin at a concentration of 20%. From the above two tests showed that OPT improved quality of prior treatment compregnation, analysis of thermal degradation by using Thermogravimetry

Making particle boards from plastic waste and wood waste in community groups in village building rejo tanjung morawa district deli serdang district Wirjosentono, Basuki; Tamrin; Siregar, Amir; Gustanto
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Plastic waste and wood waste in Bangun Rejo Village in Tanjung Morawa Sub-District, Deli Serdang Regency, North Sumatra Province, located 35 km east of Medan City Center, is still not managed and utilized as a value-added product. Plastic waste and wood waste can be processed into particle boards for building materials. Collection and sampling of raw materials for polystyrene plastic waste (steroform) and sawdust wood waste have been carried out from Bangun Rejo Village, Tanjung Morawa District, Del Serdang Regency. Furthermore, polystyrene plastic waste and sawdust wood waste were prepared at the USU FMIPA Polymer Chemistry Laboratory in Medan for the manufacture of particle board. Laboratory scale particle board manufacturing is done using xylene solvent and binder using press molding techniques and mold size 15 cm x 10 cm x 0.8 cm with optimum ratio of plastic waste with wood waste (60 g: 60 g). Particle board yields are adjusted to the Indonesian National Standard (2006), which can be used as wall or housing flooring. Solutions offered to community groups in the village in the program. Training activities on the preparation of materials and the manufacture of particle boards from plastic waste and wood waste, as building materials, were carried out on August 20, 2019 at the Bangun Rejo Village Office, Tanjung Morawa District. Furthermore, it is recommended that the community groups in the village be guided to form a particle board manufacturing group under the auspices of the University of North Sumatra.

Molecular Weight and Functional Group Analysis of Low Molecular Weight of Liquid Cyclic Natural Rubber Widiarti, Leni; Sajaratuddur, Sajaratuddur; Wirjosentono, Basuki; Eddyanto, Eddyanto
ALKIMIA Vol 6 No 1 (2022): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

The research about molecular weight and functional group analysis of low molecular weight liquid cyclic natural rubber has been done. The aim of this research is to achievement the quality of low molecular weight of liquid cyclic natural rubber. This research has been made in several steps such as preparation of the sample of rubber, the process of molecular degradation of cyclic rubber, and characterization of LCNR by using FTIR, GPC and viscosity test. Degradation is done with the help of the phenylhydrazine reagent with oxygen gas atmosphere with a flow rate of 2 LMin-1 for 24 hours. Molecular weight analysis by GPC had result the LCNR sample had a Mw is 60,556, a Mn is 6,661, and a PDI is 11,08613. The intrinsic viscosity can be used by relating it to the molecular weight by the Mark Houwink – Sakurada (MHS) equation and get the result 63.533 for LCNR molecular weight. The C-H stretching and bending region are two of the most difficult regions to interpret in infrared spectra. The ranges between 3300 to 2750 cm-1 is the C-H stretching region, is the more practical of the two regions. The frequency with which C-H bonds are obstructed is largely determined by the type of hybridization attributed to the bond. The stronger the vibrational force constant, the higher the vibration frequency.

Analisis Asam Lemak Omega 3 dan 6 pada Minyak Ikan Lele secara GC-FID Pandiangan, Maruba; Kaban, Jamaran; Wirjosentono, Basuki; Silalahi, Jansen
Jurnal Riset Teknologi Pangan dan Hasil Pertanian (RETIPA) Volume 1 Nomor 1
Publisher : Universitas Katolik Santo Thomas Medan

Omega 3 and 6 fatty acids are very good consumed to improve human health. For this reason, research is needed to determine the glyceride profile and identification of omega 3 and 6 fatty acids in fat molecules so that the potential of catfish oil as a source of omega 3 and 6 can be known. Catfish oil was extracted by the soxletation method. Fatty acid composition was analyzed by gas chromatography (GC-FID) which was previously esterified using BF3. The results showed that the composition of unsaturated fatty acids more than saturated fatty acids. Omega-3 fatty acids are found consisting of linolenic acid, eicosapentanoic acid (EPA) and docosahexanoic acid (DHA) and omega 6, namely linoleic acid. The comparison of omega 3 and omega 6 in catfish oil is still within the recommended comparison terms. Judging from the composition and position of catfish oil fatty acids which contain omega 3 and omega 6 fatty acids. Thus catfish oil has the potential as a source of omega 3 and 6 from one of the freshwater fish that are consumed by many people.

Effect of Surfactant Tween 80 (Polyoxyethylene Sorbitan Mono Oleate) Addition on Viscosity and Activation Energy on Making Asphalt Emulsion Wirjosentono, Basuki
Journal of Chemical Natural Resources Vol. 2 No. 2 (2020): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Asphalt emulsion is a mixture of asphalt (55% - 65%), water (35% - 45%) and emulsifier material (1% - 2%). This research studied the effect of adding surfactant tween 80 (polyoxyethylene sorbitan mono-oleate) on the viscosity and activation energy. The research data was obtained by mixing asphalt, surfactant tween 80, and water and then heated at a certain temperature and viscosity values were measured using a Brookfield Viscosimetre at 500 rpm. The results show that the viscosity and the activation energy increase with the addition of surfactant tween 80: Î· = -49,82380 cp end Ea = 9,18452154 kJ/mol

Utilization of Used Polystyrene As Adhesive In Polymer Emulsion Asphalt Wirjosentono, Basuki; Gustira, Rinna Ayu; Muis, Yugia
Journal of Chemical Natural Resources Vol. 3 No. 2 (2021): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

The utilization of used polystyrene as adhesive material for emulsion polymer asphalt has been carried out. Polystyrene foam was dissolved in toluene at the ratio of 30:70 mL, then the solution was mixed with aquadest at ratios of 90: 10 mL, 70: 30 mL, 50: 50 mL, 30:70 mL, and 10: 90 mL. Then added with 10 mL of Sodium Dodecyl Sulfate solution at concentrations of 10%, 20%, and 30%. The most stable latex polystyrene was mixed with 200 g of sand aggregate at volume ratios of 10 mL, 20 mL, 30 mL, 40 mL, and 50 mL. Then the mixture was pressed into a hotpress at 150ÂºC for 20 minutes. The mixture obtained was characterized using tensile strength testing, water absorption, and SEM spectroscopy. The results showed that the mixture of sand aggregate with 50 mL latex polystyrene has the best compressive strength and water absorption, at a load of 1606 Kg.f, a stroke of 14.93 mm/minutes, and a water absorption percentage of 18%. The morphology result showed that the surface of sand aggregate with 50 mL of latex polystyrene mixture contains smaller and least holes than the surface of sand aggregate with 10 mL of latex polystyrene mixture.

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