Preparation and Antimicrobial Activity of Corn Cob and Coir Reinforced Biodegradable Starch Biocomposite Films for Food Packaging Application
Asian Food Science Journal · pp. 53–66 · Published 20 May 2022
10.9734/afsj/2022/v21i730440Abstract
Finding a bio-composite film to replace petroleum-based synthetic plastic has received considerable attention in recent years. In this research, biocomposite films were effectively prepared using corn cob powder and coconut coir as reinforcing materials in various concentrations using solution casting and annealing techniques. Corn starch was used as a co-biopolymer, glycerol (3% v/v) and acetic acid (5% v/v) as plasticizers were added as well. Biodegradability, mechanical, physical, FTIR, SEM, XRD, tensile and antibacterial tests were performed on the biocomposite samples. The biodegradability test showed that the samples were biodegradable and that the rate of biodegradation improved with time, reaching 87.37 % in just ten days. The SEM test was used to investigate the molecular structure of the biocomposite films, and the findings demonstrated that the raw ingredients had been well mixed, resulting in a smooth surface. The antibacterial test was conducted against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) bacteria. This study examines the influence of fiber reinforcement on the mechanical properties of biocomposites based on starch. Various natural fibers may boost the strength of biocomposites, as shown by the findings. According to the results, maize starch, corn cobs, and coconut coir are all suitable for food packaging purposes.
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