Characterization and antibacterial properties of chitosan–polyvinyl alcohol-3-phenyllactic acid as a biodegradable active food packaging. (December 2022)

• Record Type: Journal Article
• Authors: Zhang, Jianming; Chen, Juan; Zhang, Chengcheng; Yi, Huaxi; Liu, Daiyao; Liu, Daqun
• Is Part Of: Food packaging and shelf life. Volume 34(2022)
• Publication Date: 2022-12
• Subjects: Chitosan -- Polyvinyl alcohol -- 3-phenyllactic acid -- Antibacterial active films; Food -- Packaging -- Periodicals; Food -- Preservation -- Periodicals; Food -- Packaging; Periodicals; 664.0905
• DOI: 10.1016/j.fpsl.2022.100963
• Languages: English
• ISSNs: 2214-2894

Abstract

Abstract: Antibacterial active films based on chitosan (CS)–polyvinyl alcohol (PVA) blends enriched with 3-phenyllactic acid (3-PLA) were developed and evaluated. The CS–PVA–3-PLA films were flexible, clear, homogeneous, and smooth. The addition of 3-PLA (<1.75%) did not affect surface microstructure, thickness, color, moisture content, water solubility, and water vapor permeability of films. Nevertheless, the 3-PLA incorporation remarkably improved elongation at break, ultraviolet barrier property and thermal stability and decreased tensile strength. This indicates that the 3-PLA could interact with CS–PVA matrix, which was also observed via ATR/FTIR and XDR. Furthermore, addition of 3-PLA into the CS–PVA films effectively inhibited growth of foodborne spoilage bacteria, The release curves of 3-PLA showed that CS–PVA-3-PLA film in 95% ethanol solutions had the longest release time. These results suggest that the CS–PVA–3-PLA film is a potential antibacterial and biodegradable material for food packaging applications. Graphical Abstract: ga1 Highlights: Films with 3-phenyllactic acid enhanced elongation at break and thermal stability. Ultraviolet barrier property of films was improved with adding 3-phenyllactic acid. Chitosan–polyvinyl alcohol–3-phenyllactic acid films had good antibacterial activity. The films can be a potential and biodegradable material for food packaging.