title: Relationship between galactomannan structure and physicochemical properties of films produced thereof.
abstract: In this work five sources of galactomannans, Adenanthera pavonina, Cyamopsis tetragonolobus, Caesalpinia pulcherrima, Ceratonia siliqua and Sophora japonica, presenting mannose/galactose ratios of 1.3, 1.7, 2.9, 3.4 and 5.6, respectively, were used to produce galactomannan-based films. These films were characterized in terms of: water vapour, oxygen and carbon dioxide permeabilities (WVP, O 2 P and CO 2 P); moisture content, water solubility, contact angle, elongation-at-break (EB), tensile strength (TS) and glass transition temperature (T g ). Results showed that films properties vary according to the galactomannan source (different galactose distribution) and their mannose/galactose ratio. Water affinity of mannan and galactose chains and the intermolecular interactions of mannose backbone should also be considered being factors that affect films' properties. This work has shown that knowing mannose/galactose ratio of galactomannans is possible to foresee galactomannan-based edible films properties.
authors.affiliation: Improveat, Ltd. Spinpark - Centro de Incubação de Base Tecnológica, S. Cláudio de Barco, 4805-017 Guimarães, Portugal.
authors.forename: V R F
authors.initials: VR
authors.lastname: Dos Santos
authors.affiliation: Departamento de Engenharia de Pesca, Universidade Federal do Ceará, Campus do Pici, Fortaleza, Ceará Brazil.
authors.forename: B W S
authors.initials: BW
authors.lastname: Souza
authors.affiliation: Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
authors.forename: J A
authors.initials: JA
authors.lastname: Teixeira
authors.affiliation: Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
authors.forename: A A
authors.initials: AA
authors.lastname: Vicente
authors.affiliation: Improveat, Ltd. Spinpark - Centro de Incubação de Base Tecnológica, S. Cláudio de Barco, 4805-017 Guimarães, Portugal ; Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
authors.forename: M A
authors.initials: MA
authors.lastname: Cerqueira
keywords: Edible packaging; Mechanical properties; Polysaccharide; Thermal properties; Transport properties