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The highly synthetic plastic waste makes worrisome problems for the biosphere, so the use of bioplastic was applied for reducing this problem. Biocomposite based cassava starch-carrageenan blend with nanoclay reinforcement has great potential to increase their properties. The research objective was to evaluate the biocomposite properties in the presence of nanoclay added to starch/carrageenan blend matrix composite. The method was an experiment research using addition various nanoclay content as much as 2.5%, 5.0%, 7.5%, and 10.0% (wt/wt) into starch/carrageenan blend matrix. The procedures include a biocomposite synthesis using the casting methods and characterized of biocomposite properties using XRD, FTIR, SEM, and TGA. The mechanical strength was measured on a tensile strength tester. The results show that the nanoclay addition into starch/carrageenan matrix affects the structure, tensile strength, and thermal stability. This result shows that the addition of nanoclay into starch/carrageenan based matrix affects the mechanical properties, thermal stability through structural change. The variations of nanoclay content in biocomposite of 0, 2.5, 5.0, 7.5, and 10% results in a tensile strength of 580, 636, 760, 483, and 531 kPa and elastic modulus of 1621, 1681, 1745, 1133, 1176 kPa, respectively.

Properties of Starch/Carrageenan Blend Biocomposite with Nanoclay Reinforcement