Characterization of Dynamic Wetting of Plasma-Treated Ptfe Film

Abstract

Polytetrafluoroethylene (PTFE) has been increasingly used in many industries due to its low frictional coefficient and excellent chemical inertness. The surface properties of PTFE are of importance in various applications. The surfaceproperties of PTFE can be modifiedby different techniques. In this study, PTFE film was treated in oxygen plasma for improving surface wettability. The effects of plasma treatment on dynamic wetting behavior were characterized using Scanning Probe Microscopy (SPM), Fourier transform infrared spectroscopy (FTIR), and dynamic contact angle (DCA) measurements. SPM observations revealed the etching effect of the plasma treatment on the film. The introduction of hydrophilic groups by plasma treatment was detected by FTIR. The roughened and functionalized surface resulted in the change in both advancing and receding contact angles. Advancing and receding contact angles were significantly reduced, but the contact angle hysteresis was obviously increased after plasma treatment.

Enhancing surface adhesion of polytetrafluoroethylene induced by two-step in-situ treatment with radiofrequency capacitively coupled Ar/Ar+CH4+NH3 plasma

“…For the C 1s-XPS spectra of PACN, the CF 2 peak almost disappears and is replaced by C-C and C-NH 2 bonds [39]. The chemical structure of PA 2 CN is similar to that of PACN.…”

“…Polytetrafluoroethylene (PTFE) has been used in various applications due to its excellent properties, such as wear resistance, acid and alkali resistance and thermal stability [1][2][3][4]. The hydrophobicity and low surface tension of PTFE make it very difficult to bond with other materials, seriously limiting its scope of application [5,6].…”