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Tailoring Highly Ordered Graphene Framework in Epoxy for High-Performance Polymer-Based Heat Dissipation Plates.

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Summary

A novel highly ordered graphene framework (HOGF) significantly boosts polymer composite thermal conductivity for electronics. This advancement offers superior heat dissipation in devices, overcoming limitations of current graphene-based materials.

Keywords:
highly ordered graphene frameworkstress-induced orientationstructure modulationthermal managementthermally conductive composite

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Increasing power density in electronics necessitates improved thermal management solutions.
  • Graphene shows promise for enhancing polymer thermal conductivity, but limitations persist.
  • Existing graphene-based composites often exhibit restricted thermal performance.

Purpose of the Study:

  • To develop an advanced graphene filler for significantly improving polymer thermal conductivity.
  • To create a highly ordered graphene framework (HOGF) for enhanced phonon transport.
  • To evaluate the thermal management capabilities of the resulting HOGF/epoxy composite.

Main Methods:

  • Fabrication of a highly ordered graphene framework (HOGF) using a templated assembly strategy.
  • Incorporation of HOGF into an epoxy (EP) matrix at 24.7 vol %.
  • Characterization of the in-plane thermal conductivity and thermal management performance.

Main Results:

  • The HOGF/EP composite achieved a record in-plane thermal conductivity of 117 W m-1 K-1.
  • This represents a 616-fold increase compared to neat epoxy, attributed to HOGF's structure and properties.
  • The composite demonstrated a 75% enhancement in heat dissipation for high-power LED cooling compared to alumina.

Conclusions:

  • The developed HOGF provides superefficient phonon transport pathways, overcoming limitations in graphene-based polymer composites.
  • HOGF/EP composites offer a viable solution for advanced thermal management in electronic devices.
  • This work presents a significant advancement in developing high-performance polymer composites for thermal applications.