Nanofluids, systems consisting of a base fluid and dispersed nanoparticles, have attained a large scientific interest recently, mainly due to unusual enhancement in their thermal properties like the thermal conductivity and heat capacity. While both molecular solvents and ionic liquids have been examined, ionic liquids are known for the specific properties caused by the interactions occurring in these systems. Physical properties of very mixtures containing an ionic liquid and nanoparticles still remain not fully investigated and analyzed in the literature, to date. One of the possible issues which limits the fundamental understanding of such systems is related to the determination of the mechanism explaining the unusual enhancement of the thermal properties, in particular the heat capacity. The aim of this work is to discuss the mechanism of heat capacity enhancement of several ionic liquid-based nanofluids doped with carbon nanotubes, boron nitride and graphite, based on the experimental data of density and heat capacity determined as the function of the nanofluid composition and temperature from (298.15 to 363.15) K at 0.1 MPa.

由基础流体和分散的纳米颗粒组成的纳米流体系统最近获得了广泛的科学兴趣，这主要是由于其导热性和热容量等热性能的异常提高。虽然已经检查了分子溶剂和离子液体，但已知离子液体具有因在这些系统中发生的相互作用而引起的特定特性。迄今为止，包含离子液体和纳米颗粒的非常混合物的物理性质仍未得到充分研究和分析。限制这种系统的基本理解的可能问题之一与确定解释热性能，特别是热容量的异常增加的机理有关。