The properties of carbonized lignin nanoparticles were investigated to determine if this material could be used as an environmentally-friendly alternative to carbon black. The observed surface area of the carbonized lignin was found to be higher than that of carbon black because the powder is highly porous. The lignin nanoparticles were able to be produced in such a way as to give a similar size as carbon black nanoparticles, with ...
The purpose of this study was to measure the thermal properties of ammonia borane and polyiminoborane with the transient plane source (TPS) method to analyze their applicability to heat storage systems. Tests results showed that the thermal diffusivity and thermal conductivity of ammonia borane increased as porosity of the samples decreased. Alternatively, both thermal properties of polyiminoborane increased with porosity, and thermal conductivity values were significantly lower than those obtained ...
Thermally conductive pressure-sensitive adhesives (TC-PSA) are used in electronic devices and industrial applications. This paper examined how particle size, shape, and the addition of a coupling agent (GSP) affected the thermal conductivity of TC-PSA. A thermophysical properties analyzer measured the thermal conductivity of the particle-filled polymer using the transient plane source (TPS) method. Results showed that the thermal conductivity of the particles increased with diameter and aspect ratio, and the ...
Copper powder was used a filler and added to a polyamide matrix in order to generate copper reinforced polyamide composites. The copper powder came in three different forms: short fibers, plates and spheres. The short fibers were added to the polyamide matrix at a vol.% up to 30, and the plates and spheres up to 60 vol.%. Thermal conductivity was measured and it was found that at filler amounts below 10 vol.% the ...
Using Al2O3 nanoparticles, de-ionized water, and different volume fractions of two surfactants, Al2O3/water nanofluids were prepared by a two-step method. Thermal conductivities of the nanofluids were measured by the thermal constants analyzer. The choice of surfactant used (either sodium dodecyl sulfate (SDS) or polyvinylpyrrolidone (PVP)) had an influence on the thermal and mechanical properties of the nanofluids. PVP was found to be better at stabilizing the nanofluid, ...
