Water Diffusion Mechanisms in New Bio-Nanocomposites Based on Polyhydroxyalkanoates/Nanoclays

Raphaël Cretois; Nadège Follain; Jérémie Soulestin; Eric Dargent; Laurent Lebrun; Stéphane Marais

doi:10.4028/www.scientific.net/AMR.747.682

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 747Water Diffusion Mechanisms in New...

Water Diffusion Mechanisms in New Bio-Nanocomposites Based on Polyhydroxyalkanoates/Nanoclays

Abstract:

Nanocomposites based on bacterial semi-crystalline polyhydroxyalkanoates, poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) or poly (3-hydroxybutyrate-co-4-hydroxybutyrate) (P(3HB-co-4HB)), and organo-modified montmorillonite nanoclay are prepared by melt processing. All nanocomposites are characterized by X-Ray Diffraction (XRD) and Transmission Electronic Microscopy (TEM) and exhibit a mainly intercalated structure. Concerning water transport properties, a decrease of barrier properties for PHBV/nanoclay films is measured due to the affinity of nanoclay to water; whereas for P(3HB-co-4HB)/nanoclay nanocomposites, a decrease of the water permeability is observed relative to the tortuosity effect. Eventually, as a function of nanoclay content, a competition is evidenced between the tortuosity effect and the water sorption induced by nanoclay.

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Periodical:

Advanced Materials Research (Volume 747)

Pages:

682-685

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.747.682

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Online since:

August 2013

Authors:

Raphaël Cretois, Nadège Follain, Jérémie Soulestin, Eric Dargent, Laurent Lebrun, Stéphane Marais

Keywords:

Barrier Properties, Nanocomposite, PHA, Water Permeation

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