Defluorination Treatment of Polytetrafluoroethylene Surface by Atmospheric Pressure Glow Plasma with Boron Source

Abstract

Polytetrafluoroethylene (PTFE) sheet surface was treated by the diborane/H₂/He plasma for the deflurination to improve the painting performance. Diborane was generated by the H/He plasma treatment of a boron plate. And then, the defluorination plasma treatment with this diborane/H₂/He mixture gas performed to PTFE sheet. Fluorine atom content of treated PTFE surface was decreased to about one hundredth of that of untreated PTFE. The water contact angle of treated PTFE was also decreased from 12° to 50°. A paint coated on treated PTFE adhered to its surface strongly.