Direct Production of Sorbitol-Plasticized Bioplastic Film from Gracilaria sp.
Ahmad Faldo, Labanta Marbun, Hezekiah Lemuel Putra Zebua, Fateha Fateha, Rossy Choerun Nissa, Yurin Karunia Apsha Albaina Iasya, Riri Uswatun Annifah, Amrul Amrul, Yeyen Nurhamiyah
Journal of Polymer Materials, Vol.42, No.3, pp. 743-755, 2025, DOI:10.32604/jpm.2025.069981
（This article belongs to the Special Issue:
Development and Application of Biodegradable Plastics)
Abstract Conventional bioplastic production from seaweed often relies on extraction processes that are costly, time-consuming, and yield limited product. This study presents a direct fabrication method using
Gracilaria sp., a red seaweed rich in polysaccharides, to produce bioplastic films without the need for extraction. Sorbitol was incorporated as a plasticizer at concentrations of 0%–10% (w/w) to modify film characteristics. Thermal analysis revealed improved stability at moderate sorbitol levels (5%–7%), while excessive plasticizer slightly reduced thermal resistance. Mechanical testing showed that sorbitol increased film flexibility and elongation at break, though tensile strength and stiffness declined. Tear strength followed
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