Highly Thermally Conductive Polydimethylsiloxane Composites with Controllable 3D GO@f-CNTs Networks via Self-sacrificing Template Method

Shuang Shuang Wang, Dian Ying Feng, Zhi Ming Zhang, Xia Liu, Kun Peng Ruan, Yong Qiang Guo, Jun Wei Gu

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

Constructing controllable thermal conduction networks is the key to efficiently improve thermal conductivities of polymer composites. In this work, graphite oxide (GO) and functionalized carbon nanotubes (f-CNTs) are combined to prepare “Line-Plane”-like hetero-structured thermally conductive GO@f-CNTs fillers, which are then performed to construct controllable 3D GO@f-CNTs thermal conduction networks via self-sacrificing template method based on oxalic acid. Subsequently, thermally conductive GO@f-CNTs/polydimethylsiloxane (PDMS) composites are fabricated via casting method. When the size of oxalic acid is 0.24 mm and the volume fraction of GO@f-CNTs is 60 vol%, GO@f-CNTs/PDMS composites present the optimal thermal conductivity coefficient (λ, 4.00 W·m−1·K−1), about 20 times that of the λ of neat PDMS (0.20 W·m−1·K−1), also much higher than the λ (2.44 W·m−1·K−1) of GO/f-CNTs/PDMS composites with the same amount of randomly dispersed fillers. Meanwhile, the obtained GO@f-CNTs/PDMS composites have excellent thermal stability, whose λ deviation is only about 3% after 500 thermal cycles (20–200 °C).

Original languageEnglish
Pages (from-to)897-906
Number of pages10
JournalChinese Journal of Polymer Science (English Edition)
Volume42
Issue number7
DOIs
StatePublished - Jul 2024

Keywords

  • Hetero-structured thermally conductive fillers
  • Polydimethylsiloxane
  • Self-sacrificing template
  • Thermal conduction networks

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