Abstract:Electrospun polyacrylonitrile-based (PAN-based) composite fibrous membranes with different amount of nano-graphite powder (NG) were fabricated as supporting materials. The capric-lauric-myristic acid (CA-LA-MA) was selected as solid-liquid phase change materials. And then the CA-LA-MA/PAN/NG form-stable phase change composite fibrous membranes were prepared by physical adsorption method. Chemical property, morphological structure, thermal energy storage property, thermal energy storage and release rates of form-stable phase change composite fibrous membranes were systematically studied by FT-IR, SEM, differential scanning calorimetry (DSC) and thermal performance tester, respectively. Research results indicate that CA-LA-MA ternary eutectic is successfully adsorbed into the porous network structure of PAN-based composite fibrous membranes. Phase change melting temperature and enthalpies of form-stable phase change composite fibrous membranes are about 19 ℃ and 114~131 kJ/kg, respectively. And their thermal energy storage and release rates are obviously improved by about 43% and 42% due to addition of the NG with the high conductivity.