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All Journal Saintia Kimia JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR)
Yugia Muis
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

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PENENTUAN BERAT MOLEKUL DAN DERAJAT POLIMERISASI α – SELULOSA YANG BERASAL DARI ALANG-ALANG (Imperata cylindrica) DENGAN METODE VISKOSITAS Rudnin Habibah; Darwin Yunus Nasution; Yugia Muis
Saintia Kimia Vol 1, No 2 (2013): SAINTIA KIMIA
Publisher : USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.681 KB)

Abstract

Research of the determination of molecular weight and degree of polymerization α-cellulose from seagegrass (Imperata cylindrica) by viscosity method had been done. To obtain the      α-cellulose, it was done using delignification process. Furthermore, the α-cellulose was characterized by infra red spectrum (FTIR) testing by compared with the infra red spectrum of α-cellulose standard. The α-cellulose viscosity was measured by using Ostwald viscometer and measurement of molecular weight and degree of polymerization based on Mark-Kuhn-Houwink equation. The results showed that the molecular weight and degree of polymerization of the α-cellulose from seagegrass (Imperata cylindrica) were 8.242,7g/mol and 45,8, respectively with the percentage of seagegrass α-cellulose was 45%. Keywords: seagegrass (Imperata cylindrica), viscosity intrinsic, molecular weight, degree of polymerization
Effect of Natural Zeolite Powder on Physical and Mechanical Properties of PP-g-MA Particle Boards and Divinylbenzene Using Palm Oil Stem Powder with Soaking Chloroacetic Acid 3% Yugia Muis; Een Melani Harahap
Journal of Chemical Natural Resources Vol. 4 No. 2 (2022): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v4i2.11967

Abstract

The effect of natural zeolite stem on physical and mechanical properties of particle boards from PP-g-MA and divinylbenzene with palm stem oil has been conducted soaked with 3% chloroacetic acid. It was performed in three steps. The first was soaking palm oil trunk in 3% chloroacetic acid for 24 hours, then filtering and rinsing until neutral. The second was polypropylene functionalization with maleic anhydride to form PP-gM A with the reflux method. PP-g-MA degree of grafting, melting point, and FT-IR analysis analyzed MA. The degree of grafting maleic anhydride of polypropylene was 9 .467 %, 1 62.06 o C melting point used for particle board adhesive. The third was particle board manufacture consisting of palm oil trunk, polypropylene, PP-g-MA, benzoyl peroxide, divinyl benzene, and zeolite with ratios of (7 0: 4 0: 3 0:2: 3: 0)g, (70: 4 0: 3 0:2:3 :3 )g, (70: 4 0: 3 0:2: 3: 6) g, (70: 4 0: 3 0:2: 3: 9 ) g, (70: 4 0: 3 0:2: 3: 12) g and (70: 4 0: 3 0:2: 3: 15) g as specimens I, II, III, IV, V, VI respectively. Physical and mechanical analysis for particle boards based on SNI 03-2105-2006 includes density, water content, swelling, modulus of rupture, and modulus of elasticity. SEM was used to analyze broken fragments of boards. From the characterizations obtained, specimen I V was the best result. All of the physical properties' values matched with particle board quality standard, with the value of MoE being 32438.53 KgF/cm2. The value of MoR was 86.50 KgF/cm2; SEM analysis showed an effect of zeolite on particle boards.
Isolation of Cellulose Nanocrysral from Oil Palm Empty Fruits Bunches with Hydrolysis Method using H2SO4 54%. Muis, Yugia
Journal of Chemical Natural Resources Vol. 2 No. 2 (2020): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.717 KB) | DOI: 10.32734/jcnar.v2i2.9323

Abstract

Isolation and characterization of cellulose nanocrystal from oil palm empty fruit bunch (OPEFB), obtained from PTPN IV Adolina, by hydrolysis method using 54% sulfuric acid have been done. The isolation process was carried out in two stages; i.e. α-cellulose insulation from OPEFB, followed by isolation of cellulose nanocrystal from α-cellulose. OPEFB was de-lignification with 3.5% nitric acid and sodium nitrite, then the residue was treated with 17,5% sodium hydroxide, and bleached with H2O2 10%. Isolation of Cellulose nanocrystal was done using 54% sulfuric acid. The result of transmission electron microscopy (TEM) analysis shows that the diameter of cellulose nanocrystal is 66,6 nm. FTIR spectra show the C-O-C stretch of α-cellulose and cellulose nanocrystal at 1141 cm-1, which indicates that there is glycoside bonding in the compound structure. The peak near 3200-3490 cm-1 is representative of the C-H and O-H groups. TGA curves show that α-cellulose occurs to decompose at around 315ºC, while cellulose nanocrystal occurs to decompose at 163ºC. The amount of char residue at 500°C in cellulose nanocrystal was remarkably higher compared to α-cellulose i.e. 30.5% and 7.2% respectively.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1140.007 KB) | DOI: 10.32734/jcnar.v3i2.9343

Abstract

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 150ºC 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.
Co-Authors Basuki Wirjosentono Darwin Yunus Nasution Een Melani Harahap Gustira, Rinna Ayu Rudnin Habibah