Phase change property of sodium acetate trihydrate modified with n-Eicosane and expanded graphite

In order to overcome the drawback of phase separation in the process of phase change and improve the thermal cycling performances of sodium acetate trihydrate (CH₃COONa·3H₂O), new phase change materials composed of CH₃COONa·3H₂O, n-Eicosane and expanded graphite (EG) were prepared by a simple blending method. The structure and thermal properties of as-prepared samples were characterized by XRD, SEM and DSC techniques. The result indicates that the thermal cycling performance of n-Eisosane-EG/CH₃COONa·3H₂O is improved by the coated effect of n-Eicosane and confinement effect of EG.