EFFECT OF GLYCEROL VARIATION ON THE PRODUCTION OF BIOPLASTICS FROM RICE BRAN BY PHASE INVERSION METHOD

Abstract

Bioplastics are plastics that we can obtain from biomass materials (renewable materials), this plastic is different from conventional plastics made from petroleum or earth's minerals. Rice bran is added with a 4% sodium hydroxide solution called the delignification process, with heating for 3 hours at a temperature of 90°C.  The results of the delignification process are filtered and washed until neutral. Then the solids are dried. Then the solids are dried, then a blanching process with H2O2 is carried out to bleach the cellulose powder from the rice bran obtained. The process of making bioplastics is carried out by the phase inversion method with fixed variables of cellulose powder 2.5 grams, chitosan 2 grams, 1% acetic acid in the amount of 100 ml, and variable glycerol volumes of 0.5 ml, 1 ml, 1.5 ml, 2 ml. A mixture of cellulose powder, chitosan, acetic acid and glycerol is heated to 70°C for 10 minutes and stirred. Then the bioplastic slurry is printed on a glass plate and dried in the oven for 5 hours. Furthermore, drying is carried out at room temperature until bioplastic is obtained. The bioplastics produced are analyzed for water resistance, tensile strength test, biodegradation test, test with ftir. The results obtained from the best water resistance test were 68.03% at the variation of 2 grams of chitosan and 2% glycerol. while the best tensile test was produced by 2% chitosan and 2 ml glycerol variation obtained 2.53 MPa. In the biodegradation test, the variation of chitosan 2 grams and glycerol 1.5 ml has the longest biodegradation time.