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Preparation and properties of blends composed of lignosulfonated layered double hydroxide/plasticized starch and thermoplastics

Edwige Privas 1 Fabrice Leroux 2 Patrick Navard 1
2 MI
ICCF - Institut de Chimie de Clermont-Ferrand
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.
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Submitted on : Thursday, May 16, 2013 - 8:52:03 AM
Last modification on : Tuesday, April 20, 2021 - 11:24:04 AM

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Edwige Privas, Fabrice Leroux, Patrick Navard. Preparation and properties of blends composed of lignosulfonated layered double hydroxide/plasticized starch and thermoplastics. Carbohydrate Polymers, Elsevier, 2013, 96 (1), pp.91-100. ⟨10.1016/j.carbpol.2013.03.042⟩. ⟨hal-00823038⟩

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