Ageing of plasma-treated poly(tetrafluoroethylene) surfaces
- 1 January 1999
- journal article
- Published by Informa UK Limited in Journal of Adhesion Science and Technology
- Vol. 13 (7), 753-761
- https://doi.org/10.1163/156856199x00983
Abstract
Highly hydrophobic poly(tetrafluoroethylene) (PTFE) surfaces were modified with an air glow discharge plasma to improve their wettability. However, the hydrophilic character obtained diminishes with time, due to molecular movement in the polymer. We have determined that the ageing process is strongly affected by the environment and temperature in which the surfaces are stored. A hydrophobic environment and high temperatures promote faster recovery of the original properties of PTFE than low temperatures. Nonetheless, a hydrophilic environment, even at high temperatures, prevents the surface from losing the polar character obtained from the plasma treatment, stopping the ageing process. Moreover, this process is reversible since the character of the treated surface changes when the environment changes (i.e. from water to air). The hydrophilicity of the surfaces was evaluated by contact angle measurements of a droplet of water.Keywords
This publication has 16 references indexed in Scilit:
- Surface Modification and Functionalization of Polytetrafluoroethylene FilmsMacromolecules, 1996
- Plasma modification of polymer surfaces for adhesion improvementIBM Journal of Research and Development, 1994
- Plasma surface modification of polyethylene: short-term vs. long-term plasma treatmentJournal of Adhesion Science and Technology, 1993
- Investigation of the ageing of plasma oxidized PEEKPolymer, 1991
- Convenient syntheses of carboxylic acid functionalized fluoropolymer surfacesMacromolecules, 1991
- Wetting behaviour of eutectic tin/lead solder and fluxes on copper surfacesJournal of Materials Science, 1991
- Surface characterization of plasma‐treated PTFESurface and Interface Analysis, 1990
- Contact angle hysteresis on oxygen plasma treated polypropylene surfacesJournal of Colloid and Interface Science, 1989
- Depth sensitivity of wetting: monolayers of .omega.-mercapto ethers on goldJournal of the American Chemical Society, 1988
- Surface-selective introduction of specific functionalities onto poly(tetrafluoroethylene)Macromolecules, 1987