MULTI-RESPONSE OPTIMIZATION OF THERMOFORMING PARAMETERS FOR HYBRID BIODEGRADABLE CONTAINERS BASED ON CASSAVA LEAVES, SAWDUST, AND STARCH USING RESPONSE SURFACE METHODOLOGY
DOI:
https://doi.org/10.11113/jurnalteknologi.v88.24789Keywords:
Cassava leaves, Hot-compression molding, Compressive strength, Box–Behnken design, Response surface methodologyAbstract
This study explores the optimization of thermoforming conditions to enhance the compressive performance of hybrid biodegradable containers fabricated from cassava leaves, sawdust, and starch via hot-compression molding. Using a Box–Behnken design integrated with response surface methodology, the effects of pressing pressure (1500-2500 psi), pressing time (5-9 minutes), and forming temperature (170-190 °C) on horizontal and vertical compressive forces were investigated. Regression analysis yielded statistically significant quadratic models for both responses with non-significant lack-of-fit, indicating model adequacy. Optimal forming conditions were determined to be 2278 psi pressure, 6.13 minutes pressing time, and 170 °C temperature, resulting in predicted compressive forces of 173 N (horizontal) and 41.27 N (vertical), with a maximum desirability score of 1.0. Experimental validation confirmed minimal deviation from predicted values. The findings demonstrate the potential of cassava leaf-sawdust-starch hybrid composites as sustainable raw materials for biodegradable packaging and highlight the effectiveness of statistically grounded optimization in improving mechanical performance through precise control of forming parameters.
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