Join us at the International Thermal Conductivity Conference (ITCC) and the International Thermal Expansion Symposium (ITES).
PMMA/silica mesocomposites (PSM) and nanocomposites (PSN) were synthesized by incorporating vinyl-modified mesoporous silica (VMS) or silica particles into the poly (methyl methacrylate). The prepared composites were characterized by TEM and GPC. Thermal conductivity and gas permeability measurements were performed on the composites using a thermal constants analyzer and Yanco GTR-31 gas permeability analyzer, respectively. It was determined that an increase in the content of nanoscale silica particles improved the ...
The authors have presented a study on the effect of interface thermal resistance on thermal conductivity in carbon nanofiber (CNF) composites. Upon measuring the thermal conductivities of nanocomposites with varying filler concentrations, it was found that the measured thermal conductivities were much lower than those predicted for a nanocomposite in which thermal resistance at CNF-matrix interfaces was negligible. A computational study on interface thermal resistance was then performed. It was ...
Sulfonated polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SPSPB) was used as a polymer matrix to create polymeric nanocomposites using graphite (G) and graphite-polyoxometalate (G-POM) as fillers. It was found that the nanocomposites had higher thermal and electrical conductivities than SPSPB alone, and that both the thermal and the electrical conductivity increased with increasing filler concentration. At all filler contents tested, the SPSPB/G-POM had both a higher thermal conductivity and a higher electrical ...
This paper proposes conducting carbon aerogels, composed of graphene and multi-walled carbon nanotubes, as an option for a thermoelectric material. The researchers found that this combination of materials increased the electrical conductivity and the Seebeck coefficient due to bridging effects, and decreased the thermal conductivity through high porosity and a uniquely structured 3-D skeleton. Atomic force microscopy and X-ray diffraction were used to quantify the physical structure of the aerogels. ...
The goal of this study was to determine how adding CdS nanoparticles to two polymer blends (PS/PVC and PS/PMMA) affects their thermal conductivities. Also, the effect of increasing the wt% of both PVC and PMMA in their respective blends was investigated. The thermal conductivity of the samples was determined through a transient plane method. The thermal conductivity of both polymer blends increased with the addition of CdS nanoparticles. ...
