Effect of Addition Elephant Grass Cellulose and CaCO3 Oyster Shell Waste as Bioplastic Composites

The effect of adding cellulose and CaCO3 as a bioplastic filler was studied. source is obtained from elephant grass plants, while oyster shell waste. primary raw material for bioplastics tapioca starch with glycerol plasticizer using the solution casting method. resulting are thin transparent but not very elastic, thickness 1 mm. mechanical properties test tensile strength between 1-3 MPa elongation 1-4.4%. Physical results density 0.313-0.33 g/mL water absorption 31.94-81.16%. morphological showed that surface getting more uneven filler. use fillers without combination better than fillers.