The researchers used an instrument to measure the thermal properties (thermal conductivity and specific heat) of anisotropic thermally insulating foams produced by the mixing of nanocellulose, graphene oxide and sepiolite nanorods via the freeze-casting method. These anisotropic foams showed superior thermal properties when compared to expanded polystyrene (a common insulation material), and had a thermal conductivity value of 0.015 W/mK which is half the value for expanded polystyrene. Not only ...
Author(s): Andraz Kocjan, Bernd Wicklein, Federico Carosio, German Salazar-Alvarez, Giovanni Camino, Lennart Bergstrom, Markus Antonietti
The authors report the synthesis of a novel functionalized graphene sheet (FGS)/silicone porous nanocomposite with varying concentrations of FGS. The physical and thermal properties of the synthesized nanocomposites were studied in depth. SEM and TEM were used to elucidate the physical microstructure of the materials, and the transient plane source (TPS) technique was used to measure thermal conductivity. The nanocomposite showed an increased thermal conductivity as compared to the ...
Author(s): Fabienne Barroso-Bujans, Jose Antonio de Saja, Miguel Angel Lopez-Manchado, Miguel-Cngel RodrC-guez-PC)rez, Raquel Verdejo
Natural rubber/graphene (NR/GE) composites were prepared by ultrasonically-assisted latex mining and an in situ reduction process, followed by latex coagulation to obtain the masterbatch. It was determined that this method of preparing the NR/GE composites resulted in an increase in tensile strength when compared to conventional direct mixing. A variety of properties of the composites were investigated, including: thermal conductivity, thermal diffusivity, specific heat, maximum torque, crosslink ...
Author(s): Guiping Yuan, Guoxia Fei, Hesheng Xia, Jinkui Wu, Ning Yan, Yanhu Zhan
In this article, the authors present a novel method for the synthesis of graphene layers that can be used in advanced electronic devices, among other applications. The preparation method involves the use of a high-pressure high-temperature process where the pressure and temperature are closely monitored in order to preferentially prepare graphene layers. The quality of the material synthesized is much better than previously reported, and the size of the layers ...
Author(s): Alexander A. Balandin, D. Teweldebrhan, F. Parvizi, H. Zhu, I. Calizo, R. Abbaschian, S. Ghosh
The addition of graphene nanoplatelets (GNP) to a paraffin-based solvent, eicosane was performed at various wt.% and subsequently the synthesized GNP/eicosane composites were analyzed by a variety of machines. The characterization of the GNP/eicosane composites was performed by the TPS technique for the measurement of thermal conductivity from 10°C to 35°C. At a wt.% of 10 GNP filler the composite had a thermal conductivity four times that of unfilled ...
Author(s): Guan-Hua Cheng, Jian-Feng Hou, Ke-Fa Cen, Li-Wu Fan, Qing Ding, Xiao Wang, Xiao-Li Yao, Xin Fang, Ya-Cai Hu, Zi-Tao Yu
