Surface Modification of Fluororubber Using Atmospheric Pressure Dielectric Barrier Discharge(DBD)

<正> Fluoride rubber F2311film,an alternating copolymer of CF2-CFCI（CTFE）andCH2-CF2（VF2）components,was treated by atmospheric pressure dielectric barrier discharge（DBD）in air.The surface structure,topography and surface chemistry of the treated F2311filmswere characterized by contact angle measurement,atomic force microscopy（AFM）,and X-rayphotoelectron spectroscopy（XPS）,respectively.The experimental results showed that a shorttime air plasma treatment led to morphological,wettability and chemical changes in the F2311films.The surface hydrophilicity increased greatly after the plasma treatment,the static watercontact angle decreased from 98.6° to 32°,and oxygen containing groups（C=O,O-C=O,etc.）were introduced.Atomic force microscopy revealed that plasma produced by DBD etched F2311films obviously.The roughness of the samples increased remarkably with the formation of peaksand valleys on the treated surfaces.The increased surface wettability may be correlated with boththe introduction of hydrophilic groups due to air plasma oxidation of the surface and the changein surface morphology etched by DBD.