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All Journal Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Makara Journal of Science Indonesian Journal of Jamu
Mas’ud, Zainal Alim
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Environmental Science Health Professions Medicine & Pharmacology

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Journal : Makara Journal of Science

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Reaction Products of Crude Palm Oil-based Fatty Acids and Monoethanolamine as Corrosion Inhibitors of Carbon Steel Ali, Mohamad Makrus; Irawadi, Tun Tedja; Darmawan, Noviyan; Khotib, Mohammad; Mas’ud, Zainal Alim
Makara Journal of Science Vol. 23, No. 3
Publisher : UI Scholars Hub

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Herein we report the application of the reaction products of crude palm oil-based fatty acids and monoethanolamine as sustainable corrosion inhibitors in acidic environments for carbon steels. Reaction products were identified based on FTIR analysis as a mixture of 2-aminoethyl fatty esters and N-(2-hydroxyethyl) fatty amides. Corrosion inhibition effect of these compounds was evaluated by potentiodynamic polarization techniques in 0.5 M HCl. The mixture of fatty esters and fatty amides showed promising potential as an alternative corrosion inhibitor. Inhibition efficiency was found to be 80% at 80 ppm. Thermodynamic and kinetic parameters obtained from the tafel plot displayed an increase in activation energy with a higher inhibitor concentration that led to the decrease in the corrosion rate. Furthermore, physisorption interaction was found to be the main process of the inhibitor’s adsorption on metal surfaces and obeyed the adsorption model of the Langmuir isotherm.
Synthesis and Application of Jatropha Oil based Polyurethane as Paint Coating Material Harjono, Harjono; Sugita, Purwantiningsih; Mas’ud, Zainal Alim
Makara Journal of Science Vol. 16, No. 2
Publisher : UI Scholars Hub

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Recently, the use of renewable sources in the preparation of various industrial materials has been revitalized in response to environmental concerns. Natural oils are considered to be the most important genre of renewable sources. Jatropha curcas oil (JPO) based polyol is an alternative material that may possibly replace petrochemical-based polyol for polyurethane coating material. Polyurethane was synthesized by reacting JPO-based polyol with isocyanate. To produce JPO-based polyol, JPO was first epoxidized to form epoxidized J. curcas oil (EJP), subsequently it was converted to polyol by the opening ring reaction with acrylic acid (AA) using triethylamine (TEA) as a catalyst. The JPO-based polyurethane film resulting from this study is compared with polyurethane film from commercial polyol for gloss, hardness, and adhesion quality. The result showed that the source of polyol has an influence on gloss, hardness, and adhesion of polyurethane film, but the differences with using isocyanate has less influence. Using visual observation, polyurethane film produced from L.OHV polyol, H.OHV polyol and commercial polyol have similar quality.
Co-Authors Ali, Mohamad Makrus Amallia, Nur Diah Ratnadewi Harjono Harjono Machfud Machfud Mohammad Khotib Nazli, Rizal Sjarief Sjaiful Nining, Euis Noviyan Darmawan Purwantiningsih Sugita Sobir Sobir Tun Tedja Irawadi