Surface Modification of Poly(ethylene Naphthalate) Films Using Atmospheric-pressure Non-equilibrium Microwave Discharge Plasma Jets

摘要

To understand the mechanism of surface processing using an atmospheric-pressure non-equilibrium microwave discharge plasma jet, we used optical emission spectroscopy to measure the vibrational and rotational temperatures of plasma. A microwave (2.45GHz) power supply was used to excite the plasma. The vibrational and rotational temperatures in the plasma were measured at approximately 0.16 eV and 0.65 eV. We also conducted plasma surface processing of poly(ethylene naphthalate) (PEN) film to measure changes in the water contact angle before and after the PEN film was processed and as the rotational temperature of the plasma increased. We conclude that the hydrophilicity of the PEN film surface improves as the rotational temperature of the plasma increases.