Open AccessSynthesis of biodegradable plastics using corn starch and corn husk as the fillers as well as chitosan and sorbitol
Author(s) -
Dina Tri Amalia,
Dadan Ridwan Saleh,
Emmidia Djonaedi
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1442/1/012007
Subject(s) - husk , chitosan , ultimate tensile strength , materials science , sorbitol , distilled water , composite material , elongation , starch , young's modulus , corn starch , biodegradation , food science , chemistry , chromatography , botany , organic chemistry , biology
Bio plastics are polymers prepared from renewable materials. In this study, maize-derived cornstarch and milled corn husk were used as the base material and filler, respectively. Corn husk powder with two-grain sizes of 150 mesh and 200 mesh, respectively, were used. Chitosan was used at concentrations of 0.02 %, 0.04 %, 0.06 %, 0.08 %, and 0.1 % by weight at a constant ratio of 1:1 to cornhusk powder and maize for improving the mechanical properties of bio plastics. The mixture was diluted using a solution containing 2.5 mL of acetic acid (25 %), 1.75 mL of sorbitol, and 70 mL distilled water. Optimum mechanical properties were observed using a cornhusk grain size of 150 meshes with 0.04% of chitosan by weight. This sample exhibited a tensile strength of 11.7164 MPa, elongation of 10.05 %, a Young’s modulus of 1.1668 MPa, and tear strength of 763.86 mN. A biodegradability of 70–100 % was achieved in 21 days with the evidence of fungal growth after 14 days. In addition, the sample was able to withstand a temperature of 140 °C for 1 h.