Mechanical properties of bioplastics of various starch to eggshell reinforcement ratios

JOAQUIN J. CORDOVA, KAREN GRACE S. FARPARAN,  and ELIZALDE MIGUEL S. FLORES

Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines

Abstract

Bioplastics are biodegradable polymers derived from the starch of natural and renewable sources such as tuber crops. While it is possible to create bioplastic with cassava starch, the resulting product has high moisture content and poor mechanical properties. In addition, the effects of varying the ratios of eggshell reinforcements on the mechanical properties of cassava-starch-based bioplastics have yet to be studied. The purpose of this study is to determine the optimal ratio of Manihot esculenta starch to eggshell reinforcement through comparison treatments and control groups. Unsuitable drying methods, improper storage, and handling caused multiple failed samples. This included the development of molds, samples not drying, and the inability to peel samples from the mold. Further development of better conditions in formulating plastic from cassava starch along with assessment of other properties should be investigated.

Keywords: bioplastic, reinforcement, ratio, tensile strength, water absorption

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