Sargassum siliquosum J. Agardh extract as potential material for synthesis of bioplastic film
2018
Lim, Jia-Yee | Hii, Siew-Ling | Chee, Swee-Yong | Wong, Ching-Lee
In this study, alginate extracted from the brown alga Sargassum siliquosum J. Agardh was used as raw material for the synthesis of bioplastic film. Two-level full factorial design (FFD) and augmented central composite design (CCD) were employed in analysing the effects of following parameter toward the physical properties of the film produced: alginate loading, addition of sago starch and sorbitol as well as the concentration of calcium chloride (CaCl₂) used during treatment process. Statistical analysis of results indicated that bioplastic film could be produced from S. siliquosum by using a mixture containing 2 g of extracted alginate powder and 15% w/w of sorbitol followed by the treatment with 75% w/w of CaCl₂. Model validation proved that the percentage error was below 3.21% in general, indicating the proficiency of the models in predicting an optimised film with the following properties: tensile strength of 33.90 MPa, elongation at break of 3.58%, water vapour permeability of 2.63 × 10⁻¹⁰ g Pa⁻¹ s⁻¹ m⁻¹ and water solubility of 33.73%.
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