BIOKOMPOSIT DARI KAPPA CARRAGEENAN DAN POLIVINIL ALKOHOL SEBAGAI PLASTIK TERBIODEGRADASI

Abstract

This research is about the influence of incorporating kappa carrageenan and chitosan on the fabrication of biocomposites comprising kappa carrageenan and polyvinyl alcohol, crosslinked using the agent glutaraldehyde. The primary objective is to perform a comprehensive characterization of these biocomposites and to determine the optimal biocomposite variation based on mechanical properties and biodegradability. The method of choice for producing these biocomposites is solution casting, with varying concentrations of kappa carrageenan at 3%, 4%, and 5% w/v, and chitosan at 1.32%, 1.76%, and 2.2% w/v. The characterization of the biocomposite films encompasses FTIR analysis, water absorption testing, tensile strength measurement, elongation assessment, and biodegradation evaluation. The results of this characterization indicate that the addition of kappa carrageenan enhances water absorption resistance and tensile strength, while also decelerating the degradation rate. Most of the biocomposite film samples meet the National Standard for tensile strength required for bioplastic bags, except for two variations: the composition with 3% w/v kappa carrageenan and 1.76% chitosan, and the composition with 5% w/v kappa carrageenan and 2.2% chitosan, both falling below the established standard.