XPS characterization of PTFE after treatment with RF oxygen and nitrogen plasma

Abstract

A study on surface modification of extended PTFE (polytetrafluoroethylene) foil after treatment in oxygen and nitrogen plasma is presented. PTFE was exposed to a weakly ionized, highly dissociated RF plasma with a high density of neutral atoms. The gas pressure was 75 Pa and the discharge power was 200 W. The appearance of the functional groups on the sample surface was determined by using high-resolution XPS. The results showed that oxygen plasma treatment did not cause any noticeable changes in the surface composition, while after nitrogen plasma treatment new functional groups were detected on the surface.

Preparation of a Super Hydrophilic Polytetrafluoroethylene Surface Using a Gaseous Ammonia-Water Low-Temperature Plasma

“…Plasma treatment is widely used for this purpose since it allows surface modification without changing the bulk properties of the material [2]. A number of studies concerning the plasma modification of polymer surfaces have already been published [3][4][5][6][7][8][9][10]. Recently, the surface modification of PTFE by plasma treatment using a mixture of gases has attracted a great deal of attention [4][5][6][7], and argon and ammonia plasmas have been shown to be very efficient at modifying PTFE surfaces [1,9,10].…”

Surface Treatment of Hydrophobic Polymers by Atmospheric-Pressure Plasma

“…XPS wide spectra of HDPE after APC and low-pressure plasma treatments. [13][14][15][16][17]. Figure 5 shows the relationship between the concentration of reactive gases (O 2 , H 2 , N 2 ) in Ar and contact angle of APC treated PTFE.…”

An in vitro bacterial adhesion assessment of surface-modified medical-grade PVC

“…This multistep approach has aroused great interest thanks to several advantages such as convenient and controllable introduction of biocidal species with a high surface density together with precise localization and long stability of the grafted layers [6,7]. In the first phase, a preliminary functionalization has to be achieved regarding an inherent lack of active entities on the pristine substrate, where low temperature-atmospheric pressure plasma treatment has been proved to be effective therein [8,9]. However, the necessity to shorten the treatment duration to a few seconds calling for rather high plasma power density remains a critical impediment to largescale applications of this type of plasma [10].…”