A Wettability Tunable Surface of Nafion? with Controlling the Flip-Flop Property by DC Applied Voltage

摘要

The flip-flop property is an attractive phenomenon on the surface of Nafion? thin film. The sulfonic groups which are hydrophilic can change the wettability of the surface by lift up or curling down. In this study, an applied voltage makes the control of sulfonic groups become available. It has been proved that when a positive voltage is loading to the film through a conductive droplet, the flip-flop property can be enhanced. Being the opposite, it also can be inhibited by a negative voltage.