Abstract: In order to study the capillary properties of superhydrophilic copper foam and the effect of evaporation of volatile working fluid on capillary performance parameters, the experiments on the capillary rise of superhydrophilic copper foam were carried out with water and ethanol as working fluids. The capillary performance parameters corresponding to different working fluids were obtained by using different theoretical models. The capillary performance parameters of different working fluids in the same sample were analyzed and compared. The results show that the evaporation of ethanol has a great influence on the capillary rise process. Based on the results, a method for accurately obtaining capillary performance parameters is proposed for volatile working fluids，and the capillary properties of superhydrophilic copper foam are systematically analyzed.

Key words: superhydrophilic copper foam; volatile working fluid; capillary performance; evaporation