title: Edible film production from chia seed mucilage: Effect of glycerol concentration on its physicochemical and mechanical properties.
abstract: This study investigated the physicochemical and mechanical properties of a novel edible film based on chia mucilage (CM) hydrocolloid. CM (1% w/v) films were prepared by incorporation of three concentrations of glycerol (25%, 50%, and 75% w/w, based on CM weight). As glycerol concentration increased, water vapor permeability (WVP), elongation at break (EB), and water solubility of CM films increased while their tensile strength (TS), and Young's modulus (YM) decreased significantly (p<0.05). CM films containing a high concentration of glycerol were slightly reddish and yellowish in color but still had a transparent appearance. CM films exhibited excellent absorption of ultraviolet light, and good thermal stability. The scanning electron micrographs showed that all CM films had a uniform appearance. This study demonstrated that the chia mucilage hydrocolloid has important properties and potential as an edible film, or coating.
authors.affiliation: Bioactive Compounds Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, Av. Bento Gonçalves n. 9500, PO Box 15059, 91501-970 Porto Alegre, RS, Brazil.
authors.forename: Melina
authors.initials: M
authors.lastname: Dick
authors.affiliation: Bioactive Compounds Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, Av. Bento Gonçalves n. 9500, PO Box 15059, 91501-970 Porto Alegre, RS, Brazil; Chemistry Institute, Federal University of Rio Grande do Sul, Av. Bento Gonçalves n. 9500, PO Box 15003, 91501-970 Porto Alegre, RS, Brazil.
authors.forename: Tania Maria Haas
authors.initials: TM
authors.lastname: Costa
authors.affiliation: Faculté des Sciences de l'Agriculture et de l'Alimentation, Pavillon Paul Comtois, Université Laval, Québec, QC, Canada G1V 0A6; Food Science and Nutrition Department, National Research Center, Cairo, Egypt.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Gomaa
authors.affiliation: Faculté des Sciences de l'Agriculture et de l'Alimentation, Pavillon Paul Comtois, Université Laval, Québec, QC, Canada G1V 0A6.
authors.forename: Muriel
authors.initials: M
authors.lastname: Subirade
authors.affiliation: Bioactive Compounds Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, Av. Bento Gonçalves n. 9500, PO Box 15059, 91501-970 Porto Alegre, RS, Brazil.
authors.forename: Alessandro de Oliveira
authors.initials: Ade O
authors.lastname: Rios
authors.affiliation: Bioactive Compounds Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, Av. Bento Gonçalves n. 9500, PO Box 15059, 91501-970 Porto Alegre, RS, Brazil. Electronic address: simone.flores@ufrgs.br.
authors.forename: Simone Hickmann
authors.initials: SH
authors.lastname: Flôres
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D003451:Cryoprotective Agents / Q000494:pharmacology*; D005990:Glycerol / Q000494:pharmacology*; D010539:Permeability; D062087:Plant Mucilage / Q000737:chemistry*; D010945:Plants, Edible / Q000737:chemistry* / Q000187:drug effects; D027544:Salvia / Q000737:chemistry* / Q000187:drug effects; D012639:Seeds / Q000737:chemistry*; D012995:Solubility; D013227:Steam; D013718:Tensile Strength
chemical_list: D001672:Biocompatible Materials; D003451:Cryoprotective Agents; D062087:Plant Mucilage; D013227:Steam; D005990:Glycerol
keywords: Chia seeds; Edible films; Mechanical properties; Mucilage; Physicochemical properties; Water vapor permeability