Biomass-based Composite Foam from Tapioca Starch/ Octenyl Succinate Starch Blended with Alpha-Chitin

This research study properties of the starch-based foam from mixed between tapioca starch and octenyl succinate starch (OSA starch), which have addition alpha-chitin prepared by hot compression molding method. Tapioca starch with 50% OSA starch were investigated. For composite foam tapioca starch mixed by adding alpha-chitin at 5-30% of starch weight, it was found that water absorption were reduced. The higher alpha-chitin content in blending foam, the denser of foam structure observed which resulted in increasing of the foam density. The maximum bending stress of composite starch was decrease, but increase the maximum bending strain.