title: Impact of electron beam irradiation on fish gelatin film properties.
abstract: The objective of this work was to display the effect of electron beam accelerator doses on properties of plasticized fish gelatin film. Electron spin resonance indicates free radical formation during irradiation, which might induce intermolecular cross-linking. Tensile strength for gelatin film significantly increases after irradiation (improved by 30% for 60 kGy). The vapour permeability is weakly affected by irradiation. Surface tension and its polar component increase significantly and are in accordance with the increase of wettability. So, irradiation may change the orientation of polar groups of gelatin at the film surface and crosslink the hydrophobic amino acids. No modification of the crystallinity of the film is observed. These findings suggest that if structure changes, it only occurs in the amorphous phase of the gelatin matrix. It is also observed that irradiation enhances the thermal stability of the gelatin film, by increasing the glass transition temperature and the degradation temperature.
authors.affiliation: National Center for Nuclear Sciences and Technologies, Sidi Thabet Technopark, 2020 Ariana, Tunisia; UMR A 102-02 PAM-PAPC Food Processing and Physico-Chemistry Laboratory, 1 esplanade Erasme, University of Burgundy/Agrosup Dijon, F-21000 Dijon, France.
authors.forename: Nasreddine
authors.initials: N
authors.lastname: Benbettaïeb
authors.affiliation: UMR A 102-02 PAM-PAPC Food Processing and Physico-Chemistry Laboratory, 1 esplanade Erasme, University of Burgundy/Agrosup Dijon, F-21000 Dijon, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Karbowiak
authors.affiliation: ICMUB UMR-CNRS 5260, EMMD, 9 Allée Alain Savary, F-21000 Dijon, France.
authors.forename: Claire-Hélène
authors.initials: CH
authors.lastname: Brachais
authors.affiliation: UMR A 102-02 PAM-PAPC Food Processing and Physico-Chemistry Laboratory, 1 esplanade Erasme, University of Burgundy/Agrosup Dijon, F-21000 Dijon, France. Electronic address: frederic.debeaufort@u-bourgogne.fr.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Debeaufort
mesh_terms: D000818:Animals; D002152:Calorimetry, Differential Scanning; D004583:Electrons; D005399:Fishes; D005609:Free Radicals; D005780:Gelatin / Q000737:chemistry / Q000528:radiation effects*; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D005609:Free Radicals; C015233:gelatin film; D014867:Water; D005780:Gelatin
keywords: Crosslinking; Electron beam irradiation; Gelatin network; Mechanical and water barrier properties; Surface hydrophobicity