In this study, graphene nanoplatelets (GNP) and multi-walled carbon nanotube fillers (MWCNT) were simultaneously added to a polycarbonate matrix, in an attempt to improve thermal conductivity. Thermal conductivities of the composites were measured at room temperature. Results show that MWCNTs can improve thermal conductivity by filling gaps between GNPs. Additionally, a small amount of well dispersed MWCNTs increased thermal conductivity by 23% compared to composites containing only GNPs....
Author(s): Hoi Kil Choi, Hyun Su Kim, Jaesang Yu, Seong Yun Kim
Graphene is a 2D single layer of carbon atoms, superior to graphite in mechanical properties and thermal conductivity. Polymer/graphene composites can be fabricated using several techniques, however this study analyzed a solid state in situ method for the creation of polyamide-6 (PA6)/graphene composites. Thermal conductivity was measured using a Thermal Constant Analyzer by transient plane source method. Thermal conductivity of PA6-graphene composites increased with the increase of ...
Author(s): Pingfu Wei, Shaoying Cui, Shibing Bai
The present study aims at encapsulating hybrid graphene aerogel (HGA) into 3D graphene foam (GF) to fabricate high-performance composite phase change materials (PCM). Using the chemical vapor deposition (CVD) technique, a 3D hybrid GF/HGA (GH) microstructure was formed to create PW/GH composite PCMs. Thermal conductivity of PW/GH composite PCMs increased due to optimized 3D GH hybrid microstructure....
Author(s): Dacheng Wei, Guo-Qiang Qi, Jie Yang, Kongyang Yi, Lan Peng, Menglin Li, Ming-Bo Yang, Rui-Ying Bao, Wei Yang, Zhi Cai
The use of graphene aerogel has recently been studied with highly functional phase change materials (PCMs) to create 3D structures for improved thermal conductivity and shape-stabilization. In this study, hybrid graphene aerogels (HGA) comprising graphene oxide (GO) and graphene nanoplatelets (GNP) were prepared. Thermal conductivity was measured and results found thermal conductivity increased linearly with low GNP content and continued to grow at a slower rate with increased GNP. Improvement ...
Author(s): Bang-Hu Xie, Guo-Qiang Qi, Jie Yang, Ming-Bo Yang, Rui-Ying Bao, Wei Yang, Yang Liu, Zheng-Ying Liu
It was found that the thermal conductivity of composite materials is enhanced by the simultaneous incorporation of dispersed pitch-based carbon fibers (PCFs) and graphene nanoplatelets (GNPs). This study investigated methods for optimizing thermal conductivity. A thermal conductivity analyzer was used to compare thermal conductivity of composites filled with PCF and/or GNP. Results show the values of thermal conductivity increased as the filler content increased, and a greater synergistic improvement ...
Author(s): Seong Yun Kim, Ye Ji Noh
