Structural analysis, and antioxidant and antibacterial properties of chitosan-poly (vinyl alcohol) biodegradable films.
The development and characterization of biodegradable blend films based on chitosan and poly (vinyl alcohol) for possible use in a variety of biological activities are reported. Fourier transform infrared spectroscopy (FTIR) spectra of chitosan-poly (vinyl alcohol) (Ch/PVA) films showed characteristics peaks shifting to a lower frequency range due to hydrogen bonding between -OH of PVA and -NH2 of chitosan. The chitosan and PVA polymers presented good compatibility. The morphology study of chitosan and composite films showed a compact and homogenous structure. The tensile strength and elongation at break increased with PVA content. In fact, the highest tensile strength and elongation at break (53.58 MPa and 454 %) occurs with pure PVA film. The results showed that PVA incorporation in the blends contributes to increase the intermolecular interactions, thus improving the mechanical properties. In addition, the prepared films demonstrated high antioxidant activities monitored by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging, reducing power, and β-carotene bleaching activity. Nevertheless, PVA addition reduced antioxidant and antibacterial activities against Gram-positive and Gram-negative bacteria tested.
University of Sfax- National School of Engineering of Sfax- Laboratory of Enzyme Engineering and Microbiology, BP 1173, 3038, Sfax, Tunisia. hajjisawssen@yahoo.fr.
Sawssen
S
Hajji
University of Sfax - Faculty of Science of Sfax-LMSE, BP 802, 3018, Sfax, Tunisia.
Achraf
A
Chaker
University of Sfax- National School of Engineering of Sfax- Laboratory of Enzyme Engineering and Microbiology, BP 1173, 3038, Sfax, Tunisia.
Mourad
M
Jridi
University of Sfax- National School of Engineering of Sfax- Laboratory of Enzyme Engineering and Microbiology, BP 1173, 3038, Sfax, Tunisia.
Hana
H
Maalej
University of Sfax- National School of Engineering of Sfax- Laboratory of Enzyme Engineering and Microbiology, BP 1173, 3038, Sfax, Tunisia.
Kemel
K
Jellouli
University of Sfax - Faculty of Science of Sfax-LMSE, BP 802, 3018, Sfax, Tunisia.
Sami
S
Boufi
University of Sfax- National School of Engineering of Sfax- Laboratory of Enzyme Engineering and Microbiology, BP 1173, 3038, Sfax, Tunisia.
Moncef
M
Nasri
D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D001409:Bacillus cereus / Q000187:drug effects; D063566:Biodegradable Plastics; D001713:Biphenyl Compounds / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D004926:Escherichia coli / Q000187:drug effects; D018857:Food Packaging; D016166:Free Radical Scavengers; D008826:Microbial Sensitivity Tests; D010084:Oxidation-Reduction; D010851:Picrates / Q000737:chemistry; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013211:Staphylococcus aureus / Q000187:drug effects; D013718:Tensile Strength
D000900:Anti-Bacterial Agents; D063566:Biodegradable Plastics; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; D011142:Polyvinyl Alcohol; D048271:Chitosan; C004931:1,1-diphenyl-2-picrylhydrazyl
Antioxidant and antibacterial activities; Chitosan/PVA films; Mechanical analysis