title: Bioinspired composites from cross-linked galactoglucomannan and microfibrillated cellulose: Thermal, mechanical and oxygen barrier properties.
abstract: In this study, new wood-inspired films were developed from microfibrillated cellulose and galactoglucomannan-lignin networks isolated from chemothermomechanical pulping side streams and cross-linked using laccase enzymes. To the best of our knowledge, this is the first time that cross-linked galactoglucomannan-lignin networks have been used for the potential development of composite films inspired by woody-cell wall formation. Their capability as polymeric matrices was assessed based on thermal, structural, mechanical and oxygen permeability analyses. The addition of different amounts of microfibrillated cellulose as a reinforcing agent and glycerol as a plasticizer on the film performances was evaluated. In general, an increase in microfibrillated cellulose resulted in a film with better thermal, mechanical and oxygen barrier performance. However, the presence of glycerol decreased the thermal stability, stiffness and oxygen barrier properties of the films but improved their elongation. Therefore, depending on the application, the film properties can be tailored by adjusting the amounts of reinforcing agent and plasticizer in the film formulation.
authors.affiliation: Division of Wood Chemistry and Pulp Technology, Department for Fiber and Polymer Technology, School of Chemical Technology, Royal Institute of Technology, KTH, 10044 Stockholm, Sweden; Wallenberg Wood Science Centre (WWSC), School of Chemical Technology, Royal Institute of Technology, KTH, 10044 Stockholm, Sweden.
authors.forename: Petri
authors.initials: P
authors.lastname: Oinonen
authors.affiliation: Department of Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
authors.forename: Holger
authors.initials: H
authors.lastname: Krawczyk
authors.affiliation: Division of Wood Chemistry and Pulp Technology, Department for Fiber and Polymer Technology, School of Chemical Technology, Royal Institute of Technology, KTH, 10044 Stockholm, Sweden.
authors.forename: Monica
authors.initials: M
authors.lastname: Ek
authors.affiliation: Division of Wood Chemistry and Pulp Technology, Department for Fiber and Polymer Technology, School of Chemical Technology, Royal Institute of Technology, KTH, 10044 Stockholm, Sweden; Wallenberg Wood Science Centre (WWSC), School of Chemical Technology, Royal Institute of Technology, KTH, 10044 Stockholm, Sweden.
authors.forename: Gunnar
authors.initials: G
authors.lastname: Henriksson
authors.affiliation: Division of Wood Chemistry and Pulp Technology, Department for Fiber and Polymer Technology, School of Chemical Technology, Royal Institute of Technology, KTH, 10044 Stockholm, Sweden. Electronic address: rosana@kth.se.
authors.forename: Rosana
authors.initials: R
authors.lastname: Moriana
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D018857:Food Packaging; D005990:Glycerol / Q000737:chemistry; D008031:Lignin / Q000737:chemistry; D008351:Mannans / Q000737:chemistry*; D055595:Mechanical Phenomena; D010100:Oxygen / Q000737:chemistry*; D013696:Temperature; D013718:Tensile Strength
chemical_list: D008351:Mannans; C443804:galactoglucomannan; D002482:Cellulose; D008031:Lignin; D005990:Glycerol; D010100:Oxygen
keywords: Bioinspired composites; Cross-linked galactoglucomannan–lignin network; Mechanical properties: Oxygen barrier properties; Thermal properties