title: Film Extrusion of Crambe abyssinica/Wheat Gluten Blends.
abstract: Crambe abyssinica is a plant with potential for use in industrial (non-food) plant oil production. The side stream from this oil production is a high-protein crambe meal that has limited value, as it is not fit for food or feed use. However, it contains proteins that could potentially make it a suitable raw material for higher-value products. The purpose of this study was to find methods of making this side stream into extruded films, showing that products with a higher value can be produced. The study mainly considered the development of material compositions and methods of preparing and extruding the material. Wheat gluten was added as a supportive protein matrix material, together with glycerol as a plasticizer and urea as a denaturant. The extrudate was evaluated with respect to mechanical (tensile testing) and oxygen barrier properties, and the extrudate structure was revealed visually and by scanning electron microscopy. A denser, more homogeneous material had a lower oxygen transmission rate, higher strength, and higher extensibility. The most homogeneous films were made at an extruder die temperature of 125-130 °C. It is shown here that a film can be extruded with promising mechanical and oxygen barrier properties, the latter especially after a final compression molding step.
authors.affiliation: SIG Combibloc; mikael.gallstedt@sig.biz.
authors.forename: Mikael
authors.initials: M
authors.lastname: Gällstedt
authors.affiliation: Innventia.
authors.forename: Henrik
authors.initials: H
authors.lastname: Pettersson
authors.affiliation: Innventia.
authors.forename: Therese
authors.initials: T
authors.lastname: Johansson
authors.affiliation: Department of Plant Breeding, The Swedish University of Agricultural Sciences.
authors.forename: William R
authors.initials: WR
authors.lastname: Newson
authors.affiliation: Department of Plant Breeding, The Swedish University of Agricultural Sciences.
authors.forename: Eva
authors.initials: E
authors.lastname: Johansson
authors.affiliation: Fibre and Polymer Technology, KTH Royal Institute of Technology; mikaelhe@kth.se.
authors.forename: Mikael S
authors.initials: MS
authors.lastname: Hedenqvist
mesh_terms: D031218:Crambe Plant / Q000737:chemistry*; D005983:Glutens / Q000737:chemistry*; D005990:Glycerol / Q000737:chemistry; D010968:Plasticizers / Q000737:chemistry; D013696:Temperature; D013718:Tensile Strength; D014908:Triticum / Q000737:chemistry*; D014508:Urea / Q000737:chemistry
chemical_list: D010968:Plasticizers; D005983:Glutens; D014508:Urea; D005990:Glycerol