title: Preparation and properties of blends composed of lignosulfonated layered double hydroxide/plasticized starch and thermoplastics.
abstract: Layered double hydroxide prepared with lignosulfonate (LDH/LS) can be easily dispersed down to the nanometric scale in thermoplastic starch, at concentration of 1 up to 4 wt% of LDH/LS. They can thus be used as a bio-based reinforcing agent of thermoplastic starch. Incorporation of LDH/LS in starch must be done using LDH/LS slurry instead of powder on order to avoid secondary particles aggregation, the water of the paste being used as the starch plasticizer. This reinforced starch was used for preparing a starch-polyolefine composite. LDH/LS-starch nanocomposites were mixed in a random terpolymer of ethylene, butyl acrylate (6%) and maleic anhydride (3%) at concentrations of 20 wt% and 40 wt%. With a 20% loading of (1 wt% LDH/LS in thermoplastic starch), the ternary copolymer is partially bio-based while keeping nearly its original processability and mechanical properties and improving oxygen barrier properties. The use of layered double hydroxides is also removing most odours linked to the lignin phase.
authors.affiliation: Mines ParisTech, CEMEF - Centre de Mise en Forme des Matériaux, CNRS UMR 7635, Rue Claude Daunesse, CS 10207, 06904 Sophia Antipolis cedex, France.
authors.forename: Edwige
authors.initials: E
authors.lastname: Privas
authors.forename: Fabrice
authors.initials: F
authors.lastname: Leroux
authors.forename: Patrick
authors.initials: P
authors.lastname: Navard
mesh_terms: D006878:Hydroxides / Q000737:chemistry*; D008031:Lignin / Q000031:analogs & derivatives* / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D009812:Odorants; D010969:Plastics / Q000737:chemistry*; D013213:Starch / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D006878:Hydroxides; D010969:Plastics; C000353:calcium lignosulfonate; D013213:Starch; D008031:Lignin