Keywords: 
• 核孔膜 /
• 锥角 /
• 32 S离子 /
• PET膜

Abstract: The PET membranes are irradiated by 32S ions. The 32S ions were produced by the HI-13 tandem accelerator in China Institute of Atomic Energy. The membranes used for the experiment have been aged in air for three months. The PET membranes are etched in the particular device. Sodium hydroxide solution is used as etchant. The effects of different concentration of sodium hydroxide solution and etching temperature on the pore shape have been studied. The pores have a diameter of 0.2～0.93 μm respectively in different membranes and the taper angle have been calculated. The pore diameter, etchant concentration and etching temperature respectively as a function of the taper angle under different etching conditions are displayed. The experiment result showed that low concentrations of sodium hydroxide solution with high temperature make the pore taper angle and pore size relatively smaller and the pore more close to a cylinder which enables us to conclude the proper etching condition for producing. Meanwhile, Pore taper angle was relatively minimal on 0.5 mol/L sodium hydroxide solution, at 90℃with etching time in 2 hours.