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Explosive percolation yields highly-conductive polymer nanocomposites.

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Explosive percolation in graphene oxide-polymer nanocomposites achieves high conductivity. This design strategy creates segregated networks for enhanced electrical transport properties at low filler loadings.

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Explosive percolation is a phenomenon where network connectivity and system modification occur simultaneously, leading to sharp transitions and high conductivity.
  • Nanocomposites offer potential for realizing explosive percolation due to their structural and chemical variability, but this has not been exploited through design.

Purpose of the Study:

  • To demonstrate explosive percolation in graphene oxide-synthetic polymer latex composites.
  • To achieve low percolation thresholds and localized conductive pathways through designed composite structures.
  • To enhance electrical transport properties in low-loading nanocomposites.

Main Methods:

  • Fabrication of graphene oxide and synthetic polymer latex composites.
  • In situ reduction of graphene oxide at temperatures below 150°C.
  • Characterization of network formation, conductivity, and polymer matrix modification.

Main Results:

  • Composites formed segregated networks, resulting in a low percolation threshold.
  • In situ reduction induced chemical modification of the polymer matrix, introducing phenolic groups.
  • Achieved conductivities surpassed those of dense-packed reduced graphene oxide networks.

Conclusions:

  • Designed explosive percolation in nanocomposites is feasible and offers significant advantages.
  • This approach enables the creation of low-loading composites with dramatically enhanced electrical transport.
  • The findings highlight the potential for practical applications requiring high conductivity materials.