Synergistic effect of hybrid fillers/ polydimethylsiloxane composites on enhancing thermal conductivity

Chii Rong Yang, Chang Da Chen, Chia Cheng, Wen Hao Shi, Po Han Chen, Tun Ping Teng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We used the atmospheric plasma process (APP) to modify the particles of spherical aluminum nitride (AlN), graphene (GN), and multi-walled carbon nanotubes (MWCNTs) in different size. Then, the modified AlN particles, GN, and MWCNTs were added in polydimethylsiloxane (PDMS) as fillers to form hybrid fillers/PDMS composites. The thermal conductivity (k) of the test samples was measured using an instrument that referred to the ASTM D5470-06 standard. Finally, at temperature of the room to 600 °C for the sample, the highest k and pure PDMS were tested by thermogravimetric analysis. The results show that the fillers have good combination and dispersion in the PDMS, which promotes the filler to be overlapped and arranged more closely, resulting in a synergistic effect and a significant increase in the k of the hybrid filler/PDMS composites. The configuration conditions of filler with the highest k are 60 wt% spherical AlN particles, 2 wt% GN, and 2 wt% MWCNTs, and its k can reach 7.02 W/m-K. Furthermore, the hybrid fillers/PDMS with the highest k prepared in this study has superior feasibility under the operating temperature range of 200 °C in addition to a superior k value.

Original languageEnglish
Article number101591
JournalCase Studies in Thermal Engineering
Volume28
DOIs
Publication statusPublished - 2021 Dec

Keywords

  • Atmospheric plasma process (APP)
  • Hybrid fillers composites
  • Polydimethylsiloxane (PDMS)
  • Semi-curing technique
  • Synergistic effect
  • Thermal conductivity

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Fluid Flow and Transfer Processes

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