کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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658010 | 1458075 | 2013 | 6 صفحه PDF | دانلود رایگان |
We report a molecular dynamics study of heat conduction in carbon nanotube (CNT)/polyethylene (PE) composites. Particular attention was focused on two key interfacial effects: the thermal boundary resistance across the CNT/PE interface, and the reduction of CNT thermal conductivity due to boundary phonon scattering at the interface with amorphous PE matrix. The calculations reveal a relatively high thermal boundary resistance across the CNT/polyethylene interfaces (∼1 × 10−7 m2 K W−1) and a moderate but non-negligible reduction (∼28%) of CNT thermal conductivity. By a mode-dependent phonon transport analysis, the phonon boundary scattering rate was found to increase with decreasing frequency, which suggests a size effect in the thermal conductivity reduction. Finally, the likely impact of the thermal resistances on the effective thermal conductivity of a macroscopic CNT/PE composite is quantified based on an effective medium approximation model.
Journal: International Journal of Heat and Mass Transfer - Volume 67, December 2013, Pages 1024–1029