Evaluation of Surfactants on Graphene Dispersion and Thermal Performance for Heat Dissipation Coating

Chia Cheng, Wen Hao Shi, Tun Ping Teng*, Chii Rong Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
20 Downloads (Pure)

Abstract

With the development of thin and high-power electronic devices, heat dissipation has become an important and urgent issue in thermal management. In this study, a water-based epoxy was used as a polymer matrix to prepare heat dissipation coatings utilizing low volatile organic compounds, which were environmentally friendly and had a high heat-dissipating performance. Graphene flakes, multi-walled carbon nanotubes and aluminum oxide particles were used as fillers for preparing the heat dissipation coating. The graphene flakes and multi-walled carbon nanotubes were dispersed in a water-based epoxy by adding sodium dihexyl sulfosuccinate and poly (dimethyldiallylammonium chloride). These two surfactants were combined as a dispersant to improve the dispersibility of the carbon nanomaterials in the water-based epoxy. The synergistic effect of the well-dispersed fillers improved the heat-dissipating performance. The experimental results show that the infrared emissivity of the heat dissipation film was 0.96 after filling 30 wt% aluminum oxide particles, 2 wt% graphene flakes and 2 wt% multi-walled carbon nanotubes into a water-based epoxy. The heat dissipation film reduced the thermal equilibrium temperature of the bare copper panel by 17.8C under a heating power of 10 W. The film was applied in a heat dissipation test on a 15 W LED bulb, and the thermal equilibrium temperature was reduced by 21.3C. The results demonstrate that the carbon nanomaterial-based heat dissipation coating with a water-based epoxy could significantly reduce the thermal equilibrium temperature, giving a high potential for the application of thermal management.

Original languageEnglish
Article number952
JournalPolymers
Volume14
Issue number5
DOIs
Publication statusPublished - 2022 Mar 1

Keywords

  • Graphene flakes
  • Heat dissipation coating
  • Infrared emissivity
  • Surfactant
  • Synergistic effect
  • Volatile organic compounds
  • Water-based epoxy

ASJC Scopus subject areas

  • General Chemistry
  • Polymers and Plastics

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