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All Journal BIOMA Jurnal Ilmiah Teknik Kimia Jurnal Inovasi Teknik Kimia Journal of Chemical Process and Material Technology Jurnal Karya untuk Masyarakat (JKuM)
Sri Sutanti
Politeknik Katolik Mangunwijaya
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology Social Sciences

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Journal : Journal of Chemical Process and Material Technology

 1 
MODIFICATION OF LINDUR STARCH (Bruguiera Gymnorrhiza L.) BY OXIDATION USING SODIUM HYPOCLORITE AND FERRO SULPHATE CATALYST Lucia Hermawati Rahayu; Sri Sutanti; Mumpuni Asih Pratiwi; Rahelia Cahyaningtyas
Journal of Chemical Process and Material Technology Vol 1, No 2 (2022)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.681 KB) | DOI: 10.36499/jcpmt.v1i2.6669

Abstract

Lindur fruit (Bruguiera gymnorrhiza L.) is widely available in Indonesia and has a high carbohydrate content, so it has the potential to be developed as a new source of energy and starch. So far, the use of lindur fruit is still limited to substitute rice and snacks. Therefore, it is necessary to make efforts to increase the utilization of lindur fruit by processing it into lindur starch and its derivatives (modified starch). The properties of lindur starch need to be improved in order to have wider uses in the food and non-food industries. The purpose of this study was to modify lindur starch by oxidation using NaOCl with ferrous sulfate as a catalyst. In this study, the effect of sodium hypochlorite concentration (2%, 4%, 6%, and 8%) and ferrous sulfate concentration (0%, 0.1%, 0.2%, and 0.3%) on the physicochemical characteristics of starch was studied. the resulting oxidized leachate and determined the optimal conditions. The results showed that all the variables studied affected the oxidation reaction of lindur starch. Oxidation at 4% NaOCl concentration and 0.2% ferrous sulfate concentration was able to produce the best values for carboxyl content, solubility, and swelling.
Polymerization of Poly Methyl Methacrylate Using Emulsion Method and H2O2 as Initiator Sari Purnavita; Cyrilla Oktaviananda; Sri Sutanti; Herman Yoseph Sriyana; Antonius Prihanto; Antonio Mafeli
Journal of Chemical Process and Material Technology Vol 1, No 2 (2022)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13.67 KB) | DOI: 10.36499/jcpmt.v1i2.6642

Abstract

This study aims to study the effect of the amount of initiator (H2O2) on the viscosity of the Polymethyl Methacrylate (PMMA) emulsion and the solids content. The treatment of independent variables is H2O2 by 1%, 2%, 3%, and 4%. This research procedure was carried out in a two-stage process. The first stage is the process to separate the inhibitor contained in the methyl methacrylate monomer by adding a 1 N concentration of NaOH solution, stirring until evenly distributed, then put into a separating funnel to separate pure methyl methacrylate from the inhibitor dissolved in alkaline solution. The second stage is the polymerization reaction process using the emulsion method. Dissolve the poly vinyl alcohol in hot water at 70oC, put the poly vinyl alcohol solution into a three-neck flask, which is equipped with a stirrer and a hot plate heater, add the initiator and up to 60oC, then add the methyl methacrylate monomer with stirring and heating at room temperature 100oC for 1 hour. The resulting product is a thick poly methyl methacrylate emulsion, has a milky white color, and has good adhesion. Furthermore, the viscosity test was carried out using ford cup number 4 and the solids content test. The results showed that the more initiators added, the higher the viscosity and the higher the solids content.
Co-Authors Antonio Asmaranda Putra Kusuma Antonio Mafeli Antonius Prihanto Cyrilla Oktaviananda Elsa Selin Orxellina Endah Tri Utami Handhayani Handika Gilang Ramadhan Herman Yoseph Sriyana Jonathan Agung Wicaksono Leony Margrita Lucia Hermawati Lucia Hermawati Rahayu Mumpuni Asih Pratiwi Rahelia Cahyaningtyas Sari Purnavita