Darni, Yuli and Lismeri, Lia and Hanif, Muhammad and Sarkowi, Muh and Evaniya, Dita Shytauli (2019) Peningkatan Kuat Tarik Bioplastik dengan Filler Microfibrillated Cellulose dari Batang Sorgum. Jurnal Teknik Kimia Indonesia (JTKI), 18 (2). pp. 37-41. ISSN 1693-9433


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The Improving of Bioplastic Tensile Strength with Microfibrillated Cellulose Filler from Sorghum Stem. This study discusses the effect of starch on chitosan ratio (in weight basis) and also the concentration of microfibrillated cellulose as a filler in the preparation of bioplastics using sorghum starch, chitosan, and glycerol. In this study, the ratio of starch to chitosan varied was 10:0, 9.5:0.5, 8.5:1.5, 7.5:2.5, 6.5:3.5, 5.5:4,5 (gr/gr). Microfibrillated cellulose as filler was encouraged from the sorghum stem by the semi-mechanical method. The delignification of sorghum stem initiated chemical treatment with a 4% KOH solution on 80oC for 1 hour to remove lignin. Bleaching is done after delignification using 6% H2O2 at 70oC. The dried sorghum powder is further followed by mechanical treatment that is put into disk mill for 90 minutes and continued with high energy milling (HEM) to reduce its size to an average of 4-8 µm. The filler is added, and the concentration (on a weight basis) varies from 0, 1, 2, and 3%. Starch and chitosan measuring 63 microns (sieve pass), stirring time for 35 minutes at a speed of 375 rpm, and the addition of 10% by weight of glycerol as a plasticizer is kept constant. The best results in this study were obtained in formulations 8.5:1.5 (gr/gr) and 3% filler concentration. This bioplastic product has 11.64 MPa tensile strength, 10.98% elongation, 105.96 MPa Young moduli, 0.915 gr/ml density, and 38.3% water uptake.

Item Type: Article
Subjects: T Technology > T Technology (General)
Divisions: Fakultas Teknik (FT) > Prodi Teknik Geofisika
Depositing User: MUHAMMAD S
Date Deposited: 09 Jun 2020 05:50
Last Modified: 09 Jun 2020 05:50
URI: http://repository.lppm.unila.ac.id/id/eprint/22112

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