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All Journal Reaktor Jurnal Sains Materi Indonesia
Yulianti Sampora
Research Center for Chemistry, Indonesian Institute of Science
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Materials Science & Nanotechnology

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PROPERTIES OF EDIBLE FILM FROM MODIFIED SAGO STARCH PRECIPITATED BY BUTANOL Riska Surya Ningrum; Dewi Sondari; Putri Amanda; Bernadeta Ayu Widyaningrum; Dian Burhani; Fazhar Akbar; Yulianti Sampora
Jurnal Sains Materi Indonesia Vol 21, No 4: JULY 2020
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2020.21.4.6022

Abstract

ROPERTIES OF EDIBLE FILM FROM MODIFIED SAGO STARCH PRECIPITATED BY BUTANOL. The edible film is a thin layer that can be used as food packaging and safe for consumption. Starch is a material that can be used as an edible film because it is biodegradable, non-toxic, able to form a strong and transparent film. In this research, sago starch has been precipitated using butanol for 1, 2, 3, 4, and 5 hours. Precipitated sago is reacted with 3% glycerol and then formed into a film by printing it on a petri dish. Characterizations of edible films are FTIR, contact angle, water solubility, swelling power, WVTR, and mechanical properties (thickness, tensile strength, and elongation). Edible film (B2) has the best mechanical properties, that is high hydrophobicity (contact angle is 60,351 degree), tensile strength (6,8843 N/mm2), and elongation (49,5081 %), also low water solubility (0,3352 %), moisture content (18,6005 %), and WVTR (0,02986 g s-1 m-2).
Simultaneous Pretreatment Process on The Isolation of Cellulose Mycrocrystalline from Oil Palm empty Fruit Bunches Yulianti Sampora; Yenni Apriliany Devy; Dewi Sondari; Athanasia Amanda Septevani
Reaktor Volume 20 No.4 December 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (699.158 KB) | DOI: 10.14710/reaktor.20.4.174-182

Abstract

This research was aimed to evaluate the isolation of cellulose derived from empty fruit bunches (EFB), especially to increase the purity of cellulose content by subsequent pretreatment process involving delignification using NaOH followed by bleaching process using hydrogen peroxide (H2O2). The result showed that the cellulose content of the raw EFB content at 37.6% ± 0.3 w/w increased to 89.2% ± 0.4 w/w after the simultaneous pretreatment process. Moreover, after the simultaneous of bleaching process using H2O2, the lignin content can be reduced up to 3.1% ± 0.1 w/w which similar to cellulose standard (2.7% ± w/w). The utilization of simultaneous pretreatment process can also reduce the hemicellulose content from 23.9% ± 0.3 w/w (raw EFB) to 7.7% ± 0.2 w/w even lower than the cellulose standard (13.1% w/w). FTIR spectrum showed that the peak absorption of cellulose increased significantly upon the simultaneous process of delignification-bleaching. Morphological changes of the raw EFB compared to pre-treated EFB as a note by SEM analysis showed the significant transformation from the larger size and tightly bundles of micro-fibril cellulose into smaller size and individually separated micro-fibrils. Further through the simultaneous process exhibited yield at 80-85%, high crystallinity (70-80%), and good thermal stability in terms of Tonset at about 230-290 °C. From these results, it can be concluded that the subsequent pretreatment process involving NaOH delignification and H2O2 bleaching processes more likely offer a high selectivity of cellulose microcrystalline from lignocellulosic biomass material by simultaneous reduction of the hemicellulose and lignin content without disrupting the structure of cellulose.Keywords: bleaching; cellulose; delignified; microcrystalline cellulose; oil palm empty fruit bunches
Co-Authors Athanasia Amanda Septevani Bernadeta Ayu Widyaningrum Dewi Sondari Dewi Sondari Dian Burhani Fazhar Akbar Putri Amanda Riska Surya Ningrum Yenni Apriliany Devy