Improvement of thermal conductivity of poly(dimethyl siloxane) using silica-coated multi-walled carbon nanotube

Jinho Hong, Jeongwoo Lee, Chang Kook Hong, Sang Eun Shim

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

In order to enhance the thermal conductivity of MWCNT filled poly(dimethyl siloxane) (PDMS) composites, the MWCNT was coated with silica layer by three step reactions. The composites filled with raw and silica-coated MWCNTs were prepared and the properties were investigated in terms of the curing characteristics, mechanical properties, and thermal conductivity. Due to the poor compatibility between raw MWCNT and PDMS, raw MWCNT showed poor dispersion uniformity and wettability in PDMS. On the other hand, due to the chemical affinity between silica/MWCNT and PDMS throughout the hydrogen bonding, the silica-coated MWCNT filled PDMS showed improved mechanical properties in terms of tensile strength and 100% modulus, and good interfacial compatibility than raw MWCNT incorporated PDMS. Finally, the good wettability of silica/MWCNT in PDMS resulted in higher thermal conductivity caused from the facile phonon movement at the interface even with the smaller MWCNT contents.

Original languageEnglish
Pages (from-to)297-302
Number of pages6
JournalJournal of Thermal Analysis and Calorimetry
Volume101
Issue number1
DOIs
StatePublished - Jul 2010

Bibliographical note

Funding Information:
Acknowledgements This work was financially supported by Korea Research Foundation (grant no.: KRF-2007-331-D00118).

Keywords

  • Carbon nanotube
  • PDMS
  • Silica
  • Thermal conductivity

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