PATI SAGU TERMODIFIKASI SEBAGAI BAHAN STARCH-BASED PLASTICS

Indah Yuliasih, Titi Candra Sunarti

Abstract


Sago is one of potential starch sources in Indonesia. Starch-based plastics is defined as the use of starch in bio-plastics manufactured. The purpose of this study was to obtain sago starch acetate which has hydrophobic properties and compatible with synthetic plastics.

These acetylation process increased the hydrophobic properties or the oil retention capacity properties, which was showed by the ORC value. The ORC value of native sago starch, sago starch acetate, amylose fraction and amylose acetate were 6,50; 8,67; 7,67; and 16,33 % respectively. For its application as blending material of synthetic plastics showed that blending between polypropylene and sago starch acetate or amylose acetate of 10 % has more homogeneous surface morphology as showed by SEM. The tensile strength and E-modulus properties of blending between polypropylene and amylose acetate showed relatively higher than blending of polypropylene with another treatment of sago starch, and its showed elastic properties. On the other hand, the blending between polypropylene and sago starch acetate showed that the tensile strength ant strain at break properties were relatively higher compared to another treatments and its showed plastic properties. The sheet of blending between polypropylene and sago starch acetate showed the higher of absorption energy value (toughness properties) compared to another treatment.

 

Keywords : sago starch, acetylation, synthetic plastics

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