Synthesis and light-heat conversion performance of hybrid particles decorated MWCNTs/paraffin phase change materials

In this study, we adopted the organic precursor thermal decomposition method to prepare Cu 2 O-Cu-MWCNTs/paraffin light-thermal conversion phase change material via one-step. The phase, micro morphology, phase change behavior, thermal reliability and thermal stability of the products were respectively characterized by XRD, SEM, DSC and TGA. We also investigated their light-thermal conversion properties. The results indicated when the content of precursor was 0.005   mol and 0.01   mol, the average particles size of hybird particles (Cu and Cu 2 O) were 30   nm and 400   nm, respectively. It was also found that the light-heat conversion performance of Cu 2 O-Cu-MWCNTs/paraffin were better than that of MWCNTs/paraffin with the same mass fraction. After we conducted analyses of UV–vis diffuse reflection spectra and thermal conductivity, We attributed the better light-heat conversion performance of Cu 2 O-Cu-MWCNTs/paraffin to the high light absorption ability of Cu 2 O and the reduction of interface thermal resistance between MWCNTs and paraffinresulting from Cu and Cu 2 O decorated MWCNTs.