One way to improve thermal and electrical conductivity of conventional polymers is by combining polymer matrices with highly conductive fillers. This study involves an analysis of electrical and thermal conductivities of nonirradiated and irradiated samples of ethylene vinyl acetate 18 (EVA18) containing expanded graphite (EG) or SDS-EG. Thermal conductivity measurements were at room temperature. An increase in thermal conductivity was found with increasing filler content in all investigated samples, due to ...
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 ...
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 ...
In this study, the influence of silver phase on thermal properties of BaTiO₃/Ag composites are investigated. A thermal analyzer was used to measure the thermal conductivity and thermal diffusivity of the composites at ambient and elevated temperature up to 175°C. Results found that for a fixed silver composition, the thermal conductivity of the composite remained nearly constant below its tetragonal to cubic transformation temperature (120°C), then decreased and stayed ...
With little information available about the thermal conductivity of sprayed concrete, this article investigates sprayed concrete aging from five hours after casting to 20 days. Thermal conductivity was measured. Thermal conductivity was found to be higher at an early age and decreased as the concrete aged. Thermal conductivity is found to have an exponential relationship with density, regardless of mix constituents....
