Comparison of biodegradable films derived from carrageenan extracted from red seaweeds along the Karachi coastline

Abstract

This study aimed to assess and compare the properties of biodegradable films produced from carrageenan extracted from two indigenous seaweed species, Hypnea pannosa and Halymenia porphyraeformis, sourced from the Manora area of Karachi. Glycerol was employed as a plasticizer to enhance the tensile strength and elasticity of the biofilms. Results revealed a significant disparity in weight loss between Hypnea pannosa (40%) and Halymenia porphyraeformis (28%) during the soil burial test, while varying solubility rates were observed in different mediums. Moreover, Halymenia porphyraeformis exhibited higher tensile strength and elongation at break compared to Hypnea pannosa, indicating its superior gelling power and elasticity.