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  • Title: Potential antimicrobial cotton fabrics treated with cinnamaldehyde/chitosan-alginate nanocapsules for food packaging purposes.
    Author: Sultan M, Youssef AM, Taha G.
    Journal: Int J Biol Macromol; 2024 Nov; 279(Pt 3):135384. PubMed ID: 39245090.
    Abstract:
    In this study, cotton fabric was treated with chitosan/alginate nanocapsules containing cinnamaldehyde (CINA) as a natural antibacterial and antioxidant. Cinnamaldehyde was encapsulated into chitosan/alginate complex coacervate (CINA@CH/ALG). FTIR, XRD, TEM, and SEM were utilized to investigate the formation of CINA@CH/ALG nanocapsules. The weight ratios of chitosan, alginate, and the volume fractions of cinnamaldehyde have a considerable impact on the particle size of the CINA@CH/ALG nanocapsules but no significant effect on the zeta potential. The lowest particle size was 549.8 nm at a weight ratio of 1/1 and 712.6 nm for CH/ALG nanocapsules containing cinnamaldehyde oil fractions of 0.025 mL. The maximum encapsulation (91.4 %) and loading percentage (12.0 %) were achieved with 0.025 mL of cinnamaldehyde. The highest cumulative release was 50.76 % with 0.025 mL of cinnamaldehyde over 300 min. The releasing mechanism of CINA from CINA(0.025)@CH/AG follows the bi-exponential model. The maximum radical scavenging activity was 72.91 % with 0.1 mL of CINA. CINA@CH/ALG nanocapsules were applied to cotton fabric. All tested pathogen strains were sensitive to CINA@CH/ALG, with a CINA volume fraction of 0.025 representing the minimum inhibitory concentration (MIC). Salmonella Typhimurium is the pathogen most prone to cinnamaldehyde with an inhibition zone of 18 mm. The coating of cotton fabric with CINA@CH/ALG has implanted antibacterial and antifungal properties.
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