Thermal conductivity model for nanofiber networks

被引：50

作者：

Zhao, Xinpeng ^{[1
]}

Huang, Congliang ^{[1
,2
]}

Liu, Qingkun ^{[3
]}

Smalyukh, Ivan I. ^{[3
,4
]}

Yang, Ronggui ^{[1
,4
,5
]}

机构：

[1] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[2] China Univ Min & Technol, Sch Elect & Power Engn, Xuzhou 221116, Peoples R China

[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[4] Univ Colorado, Mat Sci & Engn Program, Boulder, CO 80309 USA

[5] Natl Renewable Energy Lab, Bldg & Thermal Syst Ctr, Golden, CO 80401 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2018年 / 123卷 / 08期

关键词：

CARBON NANOTUBES; MECHANICAL-PROPERTIES; HEAT-TRANSFER; COMPOSITES; TRANSPORT; RESISTANCE;

D O I：

10.1063/1.5008582

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Understanding thermal transport in nanofiber networks is essential for their applications in thermal management, which are used extensively as mechanically sturdy thermal insulation or high thermal conductivity materials. In this study, using the statistical theory and Fourier's law of heat conduction while accounting for both the inter-fiber contact thermal resistance and the intrinsic thermal resistance of nanofibers, an analytical model is developed to predict the thermal conductivity of nanofiber networks as a function of their geometric and thermal properties. A scaling relation between the thermal conductivity and the geometric properties including volume fraction and nanofiber length of the network is revealed. This model agrees well with both numerical simulations and experimental measurements found in the literature. This model may prove useful in analyzing the experimental results and designing nanofiber networks for both high and low thermal conductivity applications. Published by AIP Publishing.

引用

页数：10