title: Biochemical properties of bioplastics made from wheat gliadins cross-linked with cinnamaldehyde.
abstract: The aim of this work has been to study the modification of gliadin films with cinnamaldehyde as a potential cross-linker agent. The molecular weight profile and cross-linking density showed that cinnamaldehyde increased reticulation in the resulting films. The participation of free amino groups of the protein in the newly created entanglements could be a possible mechanism of connection between the polypeptidic chains. The combination of a Schiff base and a Michael addition is a feasible approach to understanding this mechanism. The protein solubility in different media pointed to lower participation by both noncovalent and disulfide bonds in stabilizing the structure of the cross-linked films. The new covalent bonds formed by the cinnamaldehyde treatment hampered water absorption and weight loss, leading to more water-resistant matrices which had not disintegrated after 5 months. The properties of this novel bioplastic could be modified to suit the intended application by using cinnamaldehyde, a naturally occurring compound.
authors: Instituto de Agroquímica y Tecnología de Alimentos-CSIC, Grupo de Envases, Avenida Agustín Escardino 7, 46980 Paterna, Valencia, Spain.
authors: M Pau
authors: MP
authors: Balaguer
authors: Joaquín
authors: J
authors: Gómez-Estaca
authors: Rafael
authors: R
authors: Gavara
authors: Pilar
authors: P
authors: Hernandez-Munoz
mesh_terms: D000171:Acrolein / Q000031:analogs & derivatives* / Q000737:chemistry; D000596:Amino Acids / Q000032:analysis; D003432:Cross-Linking Reagents / Q000737:chemistry*; D004063:Digestion; D004220:Disulfides / Q000737:chemistry; D004355:Drug Stability; D005903:Gliadin / Q000737:chemistry* / Q000378:metabolism; D008970:Molecular Weight; D010434:Pepsin A / Q000378:metabolism; D010969:Plastics / Q000737:chemistry*; D012995:Solubility; D014908:Triticum / Q000737:chemistry*; D014357:Trypsin / Q000378:metabolism; D014867:Water / Q000737:chemistry
chemical_list: D000596:Amino Acids; D003432:Cross-Linking Reagents; D004220:Disulfides; D010969:Plastics; D014867:Water; D000171:Acrolein; D005903:Gliadin; D014357:Trypsin; D010434:Pepsin A; C012843:cinnamaldehyde