title: Antimicrobial and physical properties of chitosan films incorporated with turmeric extract.
abstract: In this study, the effects of turmeric extract incorporation on the antibacterial and physical properties of the chitosan films were evaluated. Turmeric containing chitosan-based film was produced with casting procedure and cross-linked with sodium sulfate. Mechanical, optical, thermal properties, and water vapor permeability of the films were studied. The addition of turmeric to chitosan film significantly increased the tensile strength of the film and improved the ultraviolet-visible light barrier of the film. Infrared spectroscopy analysis suggested an interaction between the phenolic compounds of the extract and amin group of chitosan. Antimicrobial activity of the chitosan films was studied against Salmonella and Staphylococcus aureus by plate count agar technique and a better antimicrobial activity was observed with turmeric incorporation. Turmeric incorporated chitosan films with enhanced antimicrobial activity and film stiffness can be suggested as a promising application for food packaging.
authors.affiliation: Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey.
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Kalaycıoğlu
authors.affiliation: Necmettin Erbakan University, Faculty of Science, Department of Molecular Biology and Genetics, Meram, Konya, Turkey.
authors.forename: Emrah
authors.initials: E
authors.lastname: Torlak
authors.affiliation: Piri Reis University, Faculty of Engineering, Department of Electrical and Electronics Engineering, 34940, Tuzla, Istanbul, Turkey.
authors.forename: Gülşen
authors.initials: G
authors.lastname: Akın-Evingür
authors.affiliation: Erciyes University, Faculty of Engineering, Department of Textile Engineering, 38039, Melikgazi, Kayseri, Turkey.
authors.forename: İlhan
authors.initials: İ
authors.lastname: Özen
authors.affiliation: Istanbul Technical University, Department of Chemistry, Maslak, Istanbul, Turkey. Electronic address: erim@itu.edu.tr.
authors.forename: F Bedia
authors.initials: FB
authors.lastname: Erim
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D048271:Chitosan / Q000737:chemistry*; D030024:Curcuma / Q000737:chemistry*; D055595:Mechanical Phenomena; D010539:Permeability; D010936:Plant Extracts / Q000737:chemistry*; D012475:Salmonella / Q000187:drug effects; D013211:Staphylococcus aureus / Q000187:drug effects; D013227:Steam; D013696:Temperature
chemical_list: D000900:Anti-Bacterial Agents; D010936:Plant Extracts; D013227:Steam; C012596:turmeric extract; D048271:Chitosan
keywords: Antibacterial properties; Chitosan; Curcuminoids; Food packaging; Mechanical properties; Turmeric