title: Preparation and characterization of tragacanth-locust bean gum edible blend films.
abstract: The present work introduces the structure and physicomechanical properties of a novel blend film made from binary solutions of gum tragacanth (GT) and locust bean gum (LBG) at different mixing ratios. Apparent viscosities and surface tensions of individual and blend gum solutions were also investigated. The viscosity data indicated that there was a distinct synergism between the two gums at all mixing ratios. FTIR spectra showed the existence of noncovalent intermolecular interactions between gums. The surface tensions of binary solutions were significantly lower than those of individual gums which is advantageous for coating applications. All films had homogenous and smooth surface morphology and their transparency, water vapour barrier and mechanical properties were improved by incorporating LBG in blend. The results of this study suggest that GT-LBG blend film, owing to its desirable properties, has the potential to be used as a new degradable food packaging material.
authors.affiliation: Department of Food Nanotechnology, Research Institute of Food Science and Technology, PO Box: 91735-147, Mashhad, Iran. Electronic address: f.mostafavi@rifst.ac.ir.
authors.forename: Fatemeh Sadat
authors.initials: FS
authors.lastname: Mostafavi
authors.affiliation: Department of Food Nanotechnology, Research Institute of Food Science and Technology, PO Box: 91735-147, Mashhad, Iran. Electronic address: r.kadkhodaee@rifst.ac.ir.
authors.forename: Rassoul
authors.initials: R
authors.lastname: Kadkhodaee
authors.affiliation: Department of Food Nanotechnology, Research Institute of Food Science and Technology, PO Box: 91735-147, Mashhad, Iran. Electronic address: b.emadzadeh@rifst.ac.ir.
authors.forename: Bahareh
authors.initials: B
authors.lastname: Emadzadeh
authors.affiliation: Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), PO Box: 91775-1163, Mashhad, Iran. Electronic address: koocheki@um.ac.ir.
authors.forename: Arash
authors.initials: A
authors.lastname: Koocheki
mesh_terms: D018857:Food Packaging; D005685:Galactans / Q000737:chemistry*; D008351:Mannans / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D053149:Plant Gums / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013227:Steam / Q000032:analysis; D013499:Surface Properties; D013718:Tensile Strength; D014144:Tragacanth / Q000737:chemistry*; D014783:Viscosity
chemical_list: D005685:Galactans; D008351:Mannans; D053149:Plant Gums; D013227:Steam; D014144:Tragacanth; C017471:locust bean gum
keywords: Blend film; Edible films; Gum tragacanth; Locust bean gum; Synergism