title: Fabrication of gelatin-TiO2 nanocomposite film and its structural, antibacterial and physical properties.
abstract: Biodegradable fish skin gelatin-titanium dioxide (TiO2) nanocomposite films were fabricated and characterized as a function of incorporating amount of TiO2 nanoparticles (gelatin/TiO2 ratio of 30:1, 20:1 and 10:1). A uniform distribution of TiO2 nanoparticles into gelatin matrix was observed using atomic force microscopy (AFM) micrographs. The data of intrinsic fluorescence spectra, Fourier transform infrared spectra (FTIR) and X-ray diffraction confirmed the interaction between protein and nanoparticles through hydrogen bonding. The TiO2-incorporated gelatin nanocomposite films exhibited more effective antibacterial activity for Escherichia coli after irradiating 120 min by UV light (365 nm), which were 54.38% for E. coli and 44.89% for Staphylococcus aureus, respectively. The analysis of physical properties revealed that addition of TiO2 nanoparticles to gelatin films significantly increased the tensile strength and elongation at break, while decreased its water vapor permeability. The light barrier measurements indicated that these films were highly transparent, and they had excellent barrier properties against UVC light at the same time. The results demonstrated the feasibility of incorporating nanoparticles to improve the properties of gelatin films, and it is of significance in utilizing the gelatin and titanium dioxide to produce biodegradable nanocomposite film as packaging material in food industry.
authors.affiliation: College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China.
authors.forename: Qingyan
authors.initials: Q
authors.lastname: He
authors.affiliation: College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China.
authors.forename: Yuchen
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China.
authors.forename: Xixi
authors.initials: X
authors.lastname: Cai
authors.affiliation: College of Biological Science and Technology, Fuzhou University, Fuzhou 350108, China. Electronic address: shywang@fzu.edu.cn.
authors.forename: Shaoyun
authors.initials: S
authors.lastname: Wang
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D005780:Gelatin / Q000737:chemistry*; D055595:Mechanical Phenomena; D008826:Microbial Sensitivity Tests; D018625:Microscopy, Atomic Force; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010539:Permeability; D017550:Spectroscopy, Fourier Transform Infrared; D013227:Steam; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D013227:Steam; C009495:titanium dioxide; D005780:Gelatin; D014025:Titanium
keywords: Antibacterial; Nanocomposite film; Structural