Density, specific heat capacity and viscosity of fullerene C60 solutions in tetralin

Abstract

By combination of thermophysical and optical properties the solutions of tetralin with nanoparticles such as fullerene C60 can be considered as promising heat transfer agents for solar energy. The paper presents the results of experimental investigation for the density, viscosity and specific heat capacity of tetralin / fullerene C60 solutions. The study was performed in the temperature range 237…434 (K) and concentrations of fullerene C60 up to 1.043 (wt.%). The obtained results have shown an increase in the density and viscosity, as well as a decrease in the specific heat capacity of tetralin after adding C60. The obtained temperature dependences for the thermophysical properties of tetralin / C60 solutions are equidistant to theirs for tetralin. Obtained data on the density and viscosity were accurately fitted by a few-constant correlations for non-associated substances. The experimental data on the specific heat capacity of both tetralin and tetralin / C60 solutions indicate to significant effect of supramolecular structures in a liquid phase of aromatic hydrocarbons on this property. This effect is most significant in the temperature region close to the triple point. A new correlation for predicting the specific heat capacity of aromatic hydrocarbons containing fullerene C60 on the boiling line using a limited initial empirical data is proposed.