Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 58, Issue -, Pages 1-6Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2013.11.008
Keywords
Polymer-matrix composites (PMCs); Electrical properties; Thermal properties; Carbon nanotubes
Funding
- National Natural Science Foundation of China [51210004, 51303138]
- Educational Committee Foundation of Hubei [Q20131606]
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Silica coated multiwalled carbon nanotubes (SiO2@MWCNTs) with different coating thicknesses of similar to 4 nm, 30-50 nm, and 70-90 nm were synthesized by a sol-gel method and compounded with polyurethane (PU). The effects of SiO2@MWCNTs on the electrical properties and thermal conductivity of the resulting PU/SiO2@MWCNT composites were investigated. The SiO2 coating maintained the high electrical resistivity of pure PU. Meanwhile, incorporating 0.5, 0.75 and 1.0 wt% SiO2@MWCNT (70-90 nm) into PU, produced thermal conductivity values of 0.287, 0.289 and 0.310 W/mK, respectively, representing increases of 62.1%, 63.3% and 75.1%. The thermal conductivity of PU/SiO2@MWCNT composites was also increased by increasing the thickness of the SiO2 coating. (C) 2013 Elsevier Ltd. All rights reserved.
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