Micromechanical modeling and characterization of the effective properties in starch-based nano-biocomposites

Frederic Chivrac, Olivier Gueguen, Eric Pollet, Said Ahzi, Ahmed Makradi, Luc Averous

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55 Citations (Scopus)

Abstract

The aim of this work was to predict the effective elastic properties of starch-based nano-biocomposites. Experiments (materials elaboration, morphological characterization and determination of mechanical properties) were conducted on both the pristine matrix (plasticized starch) and the matrix filled with montmorillonite nanoclay. Aggregated/intercalated and exfoliated nano-biocomposites were produced and mechanically tested under uniaxial tension to understand the effect of montmorillonite morphology/dispersion on the stiffness properties of starch-based nano-biocomposites. Micromechanical models, based on the classical bounds and the Mori-Tanaka approaches, were developed taking into consideration the influence of the clay concentration, the exfoliation ratio, the relative humidity and the storage time (ageing). Predicted results are in a good agreement with our experiments and show that the micromechanical model can be used as an indirect characterization technique to quantify the exfoliation/aggregation degree in the plasticized starch/clay nano-biocomposites.

Original languageEnglish
Pages (from-to)1707-1714
Number of pages8
JournalActa Biomaterialia
Volume4
Issue number6
DOIs
Publication statusPublished - Nov 2008
Externally publishedYes

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Keywords

  • Exfoliation
  • Micromechanical modeling
  • Nano-biocomposites
  • Nanoclay dispersion
  • Starch

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Biotechnology
  • Biochemistry
  • Molecular Biology

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