Morphology effects on non-isotropic thermal conduction of aligned single- and multi-walled carbon nanotubes in polymer nanocomposites
نویسندگان
چکیده
An off-lattice Monte-Carlo simulation was used to study non-isotropic heat conduction in aligned carbon nanotube (CNT)-polymer nanocomposites (PNCs) focusing on the effects of CNT-CNT contact and CNT distribution on heat transfer. CNT-CNT contact significantly affects the effective transport properties of PNCs, including anisotropy ratios, but has not been studied extensively either theoretically or experimentally. Previous studies have considered the effective thermal conductivities of CNT-PNCs using only a very large CNT-CNT thermal boundary resistance (TBR) value compared with that of the CNT-matrix. CNT-CNT TBR may be reduced by various techniques, potentially below the CNT-matrix TBR, to further enhance thermal transport. Therefore, in this work, heat transport with CNTs in contact is
منابع مشابه
Inter-carbon nanotube contact in thermal transport of controlled-morphology polymer nanocomposites.
Directional thermal conductivities of aligned carbon nanotube (CNT) polymer nanocomposites were calculated using a random walk simulation with and without inter-CNT contact effects. The CNT contact effect has not been explored for its role in thermal transport, and it is shown here to significantly affect the effective transport properties including anisotropy ratios. The primary focus of the p...
متن کاملOn the Thermal Conductivity of Carbon Nanotube/Polypropylene Nanocomposites by Finite Element Method
In this paper, finite element method is used to obtain thermal conductivity coefficients of single-walled carbon nanotube reinforced polypropylene. For this purpose, the two-dimensional representative volume elements are modeled. The effect of different parameters such as nanotube dispersion pattern, nanotube volume percentage in polymer matrix, interphase thickness between nanotube and surroun...
متن کاملInvestigation of Crack Resistance in Single Walled Carbon Nanotube Reinforced Polymer Composites Based on FEM
Carbon nanotube (CNT) is considered as a new generation of material possessing superior mechanical, thermal and electrical properties. The applications of CNT, especially in composite materials, i.e. carbon nanotube reinforced polymer have received great attention and interest in recent years. To characterize the influence of CNT on the stress intensity factor of nanocomposites, three fracture ...
متن کاملEffects of Nanotube/Matrix Interface on Multi-Walled Carbon Nanotube Reinforced Polymer Mechanical Properties
In this paper, experimental and Finite Element Methods have been used to determine mechanical properties of nanocomposites. Standard tensile and compression samples with 0.0, 0.15, 0.25, 0.35, 0.45, and 0.55 weight fraction of Multi-Walled Carbon Nanotube (MWCNT) were prepared and tested. Nanotube weight fraction was varied to investigate the effects of nanotube weight fraction on nanocomposite...
متن کاملFinite Element Modeling of the Vibrational Behavior of Single-Walled Silicon Carbide Nanotube/Polymer Nanocomposites
The multi-scale finite element method is used to study the vibrational characteristics of polymer matrix reinforced by single-walled silicon carbide nanotubes. For this purpose, the nanoscale finite element method is employed to simulate the nanotubes at the nanoscale. While, the polymer is considered as a continuum at the larger scale. The polymer nanotube interphase is simulated by spring ele...
متن کامل