Thermal Conduction in Aligned Carbon Nanotube–Polymer Nanocomposites with High Packing Density

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• 作者：Amy M. Marconnet ; Namiko Yamamoto ; Matthew A. Panzer ; Brian L. Wardle ; Kenneth E. Goodson
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：June 28, 2011
• 年：2011
• 卷：5
• 期：6
• 页码：4818-4825
• 全文大小：902K
• 年卷期：0
• ISSN：1936-086X

文摘

Nanostructured composites containing aligned carbon nanotubes (CNTs) are very promising as interface materials for electronic systems and thermoelectric power generators. We report the first data for the thermal conductivity of densified, aligned multiwall CNT nanocomposite films for a range of CNT volume fractions. A 1 vol % CNT composite more than doubles the thermal conductivity of the base polymer. Denser arrays (17 vol % CNTs) enhance the thermal conductivity by as much as a factor of 18 and there is a nonlinear trend with CNT volume fraction. This article discusses the impact of CNT density on thermal conduction considering boundary resistances, increased defect concentrations, and the possibility of suppressed phonon modes in the CNTs.