Biodegradation of thermoplastic starch/eggshell powder composites.

Carbohydrate polymers (2013-08-06)
Munlika Bootklad, Kaewta Kaewtatip
ABSTRACT

Thermoplastic starch (TPS) was prepared using compression molding and chicken eggshell was used as a filler. The effect of the eggshell powder (EP) on the properties of TPS was compared with the effect of commercial calcium carbonate (CC). The organic compound on the surface of the eggshell powder acted as a coupling agent that resulted in a strong adhesion between the eggshell powder and the TPS matrix, as confirmed by SEM micrographs. The biodegradation was determined by the soil burial test. The TPS/EP composites were more rapidly degraded than the TPS/CC composites. In addition, the eggshell powder improved the water resistance and thermal stability of the TPS.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Calcium carbonate, ACS reagent, ≥99.0%, powder
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