Home⇛International Journal of Multidisciplinary: Applied Business and Education Research⇛vol. 6 no. 8 (2025)

Barrier Property, Antimicrobial Susceptibility, and Biodegradability of Waste Cassava Peel Starch/Waste Shrimp Shell Chitosan/Sorbitol Bioplastic Films

Bianca Isabel Molina | Joachim Florenzo Dejuras | Andre E Picar | Maria Julliana Veran | John Ray C. Estrellado

Discipline: agriculture, food and related studies

 

Abstract:

Barrier properties, antimicrobial susceptibility potential, and biodeg-radability of bioplastics are critical indicators of bioplastic viability in industrial use, especially when raw materials to the production were sourced from food waste, such as waste cassava peel starch and shrimp shell chitosan. This study aims to investigate these properties from the created bioplastic film primarily consisting of cassava peel starch (CPS) and shrimp shell chitosan (SSCHT), with sorbitol (SOR) as a plasticizer, utilizing green methods and a constrained D-optimal mixture design. Films were assessed via water uptake, water vapor transmission rate, morphology, antimicrobial susceptibility, and biodegradability. Models were generated in terms of water uptake (p = 0.0684) and water vapor transmission rate (p = 0.0013) and ranged between 88.49% to 326.35% and 435.67 to 559.09 g/m²/24h respectively. CPS (p = 0.0008) had a significant effect on water uptake levels due to its hy-droxyl groups, which form hydrogen bonds that retain water. On the other hand, water vapor transmission rate was significantly affected by CPS (p = 0.0001) and SOR (p = 0.0001). Although SSCHT (p = 0.0787) was statistically insignificant its acetyl group reduced the hydrophilic nature of CPS. CPS and SOR were found to positively affect weight loss through biodegradation due to increased hydrophilicity and microbial colonization. Scanning electron microscopy (SEM) at 300x magnifica-tion revealed visibly smooth morphology of films, while at 1500x and 6500x magnification the films had visible crevices possibly due to greater SSCHT concentrations lower WVTR, and higher CPS concentra-tions raising water absorption levels. Antimicrobial susceptibility tests showed that increased SSCHT led to more effective inhibition against E. coli and P. aeruginosa. This study provides insight into the possibili-ties of bioplastic films created from valorized food waste and used for packaging applications and these findings suggest the viability of waste-derived bioplastics in packaging applications that demand water resistance and antimicrobial activity.



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