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Article Dans Une Revue Journal of Applied Polymer Science Année : 2021

Cellulose nanocrystal‐mediated assembly of graphene oxide in natural rubber nanocomposites with high electrical conductivity

Résumé

This study reports a green and powerful strategy for preparing cellulose nanocrystal (CNC)/graphene oxide (GO)/natural rubber (NR) nanocomposites hosting a 3D hierarchical conductive network. Due to good dispersibility and amphiphilic nature of CNC, well dispersed CNC/GO nanohybrids were prepared. Hydrogen bonding interactions between CNC and GO greatly enhanced the stability of the CNC/GO nanohybrids. CNC/GO nanohybrids were introduced into NR latex under sonication and the mixture was cast. Self-assembled CNC/GO nanohybrids preferentially dispersed in the interstice between latex microspheres allowing the construction of a 3D hierarchical conductive network. By combining strong hydrogen bonds and 3D conductive network, both electrical conductivity and mechanical properties (tensile strength and modulus) have been significantly improved. The electrical conductivity of the nanocomposite with 4 wt% GO and 5 wt% CNC exhibited an increase of nine orders of magnitude compared to the nanocomposite with only 4 wt% GO; meanwhile, the electrical percolation threshold was 3-fold lower than for NR/GO composites.
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Dates et versions

hal-04099663 , version 1 (17-05-2023)

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Citer

Ge Zhu, Laura Giraldo Isaza, Alain Dufresne. Cellulose nanocrystal‐mediated assembly of graphene oxide in natural rubber nanocomposites with high electrical conductivity. Journal of Applied Polymer Science, 2021, 138 (48), pp.51460. ⟨10.1002/app.51460⟩. ⟨hal-04099663⟩

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