Effect of rice husk cellulose extraction method with the addition of plasticizer on the physico-chemical properties of bioplastics

Abstract

Indonesia is very abundant of agricultural waste including rice husk, it can be used as raw material for bioplastics. This research has been effecting of rice husk cellulose extraction method on the physico-chemical properties bioplastics with addition plasticizers. The extraction method consists of precipitation and heating methods. This study to determine effect of cellulose preparation with extraction on physico-chemical properties of bioplastics. Rice husk precipitation method was each addition 5% NaOH and Na2CO3, The rice husk autoclave method added 6% NaOH, 2.5% H2O2 and water. Rice husk were added NaOH 5 M of microwave exposure. The results of maseration method was greater are 55.68% cellulose content than using autoclave and microwave pretreatments, but the color was whiter through microwave exposure. The tensile strength value of bioplastics with the optimum extraction and heating methods (autoclave and microwave) has a tensile strength of 2.08 MPa; 3.96 MPa, 2.57 MPa and 0.97% elongation; 0.54%; and 0.75%. The physical characteristic data obtained were using a two-way randomized completely design analyzed of variance (ANOVA) if there is very real difference proceed with the Duncan multiple range test (DMRT). F-value (557.04) > F-table (4.46) has shown that cellulose extraction pretreatment method had a very significant effect on all test parameters. Soaking and heating greatly affect the amount of cellulose from the rice husks produced. Likewise the white color produced after beaching. Rice Husk Cellulose Bioplastics can be degraded within 21 days on soil media. Functional groups that appeared the peak of O-H stretching of PSS bioplastic has a shift in wave number from 3414.00 to 3441.01 cm-1. The AUS and MCS bioplastics which shifted from 3415.93 to 3419.79 cm-1 and 3412.08 to 3439.08 cm-1. The C-N peak was in the 1350-1000 cm-1 area. 1641.42 cm-1 for MSS and AUS bioplastics, H-O-H as a water absorption.