Development of food packaging bioplastic from potato peel starch incorporated with rice husk silica using response surface methodology comprehending central composite design

Rice husk and sweet potato peel are agricultural waste with high potential and economic interest. The utilization of these materials in product development will provide substantial improvement toward waste reduction. Therefore, this study aimed to develop a food packaging bioplastic using potato peel and rice husk. The optimization of three parameters (ratio of silica, the volume of glycerol and volume poured) was set in Design Expert Software version 13 to find the best formulation. The software set eighteen formulations to measure advanced bioplastic thickness, density, and moisture content. The optimum formulation exhibits thickness, density and moisture content with the value of 1.87 mm, 0.196 g/mL and 31.224%, respectively. In response surface methodology, bioplastic formulation was optimized using central composite design (CCD). The statistical model displayed an excellent fit with standard deviation, R2 data. The R2 for thickness was 0.8946, while 0.9516 for density and 0.96 for moisture content. These values were close to 1, indicating the significant effect on the tested conditions to get the optimum formulation.