In this study, high performance composite phase change materials (PCMs) were created. Graphene oxide (GO) nanosheets were used as supporting materials to keep the shape of polyethylene glycol (PEG) stable during phase change, and graphene nanoplatelets (GNP) were used as conductive fillers. Thermal conductivity was measured with a transient plane source method. Thermal conductivity was found to increase linearly with GNP loading, and PEG/GO/GNP composite PCMs exhibited higher ...
Author(s): Bang-Hu Xie, Guo-Qiang Qi, Jie Yang, Ming-Bo Yang, Rui-Ying Bao, Wei Yang, Zheng-Ying Liu
Recently, 2-D graphene nanoparticles produced by graphite exfoliation are a promising nanofiller for enhancing the thermal conductivity of polymeric materials. Unlike one-dimensional structures of carbon nanotubes, the 2-D structure provides reinforcement of polymer nanocomposites in two directions. In this article, multiwall carbon nanotubes (MWCNTs) and 2-D exfoliated graphite (EG), in a tetrafunctional epoxy resin, are investigated to determine the effect on thermal conductivity. Thermal conductivity measurements were carried out using ...
Author(s): Carlo Naddeo, Khalid Lafdi, LiberataB Guadagno, Luigi Vertuccio, Vittorio Romano
The purpose of this study was to improve the wettability of silicon carbide (SiC) nanowires, in order for them to be used as thermoconductive fluids. Multiple experiments were conducted by exposing the SiC nanowires to hydrofluoric acid, tetraethyl orthosillicate, polyvinylpyrolidone and sodium hydroxide. Various tests, including x-ray diffraction, Fourier transformation-infrared, x-ray photoelectron spectroscopy, thermogravimetric analysis, scanning electron microscopy and transmission electron microscopy, were performed on these various materials to identify ...
Author(s): Nan Zhang, Tianyu Li, Weiyue Long, Xiaoling Cao, Yanping Yuan
The thermal conductivities of paraffin-based composite phase change materials (PCMs) containing different types of graphene nanoparticles were determined using the transient plane source method. It was determined that the thermal conductivity was increased by the addition of the nanoparticles, and the enhancement was greater for composites containing larger, and stiffer nanoparticles....
Author(s): Amy S. Fleischer, Ronald J. Warzoha
Polyactic acid (PLA)-micro hexagonal boron nitride (hBN)-graphene nanoplatelet (GNP) polymer composites were prepared, and the effects of varying filler contents on the thermal and mechanical properties of the polymer composites were investigated. It was determined that the addition of the GNPs resulted in a decrease in thermal conductivity in comparison to a PLA-hBN composite unless the GNP:hBN ratio was 1:1, where the thermal conductivity was equal to that ...
Author(s): E. Bitaraf Haghigi, M. Ghanbarpour, R. Khodabandeh