Preparation and control mechanism of nano-phase change emulsion with high thermal conductivity and low supercooling for thermal energy storage

In order to investigate the control mechanism of composite phase change materials (PCM), a series nano-phase emulsion (NPCE) were prepared in this paper with high thermal conductivity, heat storage and low supercooling using hexadecane, octadecane, hexadecanol, octadecanol various metal nano-particles. Through mechanism, it is expected adjust transition range NPCE desirable range. The NPCEs characterized by particle size analyser, cryogenic transmission electron microscope (Cryo TEM), differential scanning calorimeter (DSC), conductivity meter rheometer. results showed that was successfully uniform dispersion, great stability, viscosity narrow distribution. DSC latent 20 wt. % hexadecane 55.86 kJ/kg. degree 1.25 hybrid nucleating agents reduced 81%. Metal oxides effectively improved NPCEs. 1wt. nano Al2O3 0.70 W/(m ⋅ K), which increased 21%. increase oxide concentrations decreased temperature. Importantly presented shear thinning effect can be considered as Newtonian fluid after rate 2 s−1, had potential energy system.