Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 138, Issue 48, Pages -Publisher
WILEY
DOI: 10.1002/app.51460
Keywords
3D hierarchical nanostructure; Cellulose nanocrystals; Graphene oxide; Natural rubber; Self-assembly
Categories
Funding
- PolyNat Carnot Institut [~ANR-11-CARN-030-01]
- Labex TEC 21 [~ANR11-LABX-0030]
- China Scholarship Council [201806950016]
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A green and powerful strategy for preparing CNC/GO/NR nanocomposites with a 3D hierarchical conductive network was reported. The CNC/GO nanohybrids, with enhanced stability due to hydrogen bonding interactions, significantly improved electrical conductivity and mechanical properties of the nanocomposites. The nanocomposite with 4 wt% GO and 5 wt% CNC exhibited a nine orders of magnitude increase in electrical conductivity compared to the nanocomposite with only 4 wt% GO.
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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