Superamphiphobic surfaces by atmospheric plasma polymerization

摘要

The present invention relates to a method for producing a superamphiphobic coating on a substrate, said method comprising the steps of a) providing a substrate, b) generating a plasma in a treatment space, under atmospheric pressure, using a dielectric barrier discharge, by supplying a plasma gas (6) between at least a first and a second electrode (2 and 3) connected to alternating current (AC) power means (7), said electrodes (2 and 3) defining said treatment space (5), c) introducing into said plasma a coating forming material selected from the group consisting in fluoro-acrylate monomers, fluoro-alkyl acrylatemonomers, fluoro-methacrylate monomers, fluoro-alkyl methacrylatemonomers, fluoro-silane, monomers or a combination thereof, d) exposing at least a part of the surface of said substrate to said plasma comprising said coating forming material in multiple successive passes within said treatment space by moving said substrate, said at least first and/or second electrode (2, 3), or both, without stopping, from one pass to another, the generation of the plasma and said introduction of said coating forming material into said plasma.

主权项

1. A plasma polymerization method for producing a superamphiphobic coating on a substrate, said method comprising the steps of:
a) providing a substrate, b) generating a plasma in a treatment space under atmospheric pressure, using a dielectric barrier discharge, by supplying a plasma gas between at least a first and a second electrode connected to alternating current (AC) power means, said electrodes defining said treatment space, c) introducing into said plasma a coating forming material in liquid or gaseous form, the coating forming material being selected from the group consisting of fluoro-acrylate monomers, fluoro-alkyl acrylate monomers, fluoro-methacrylate monomers, fluoro-alkyl methacrylate monomers, fluroro-silane, monomers or a combination thereof, d) depositing said coating by plasma polymerization of said coating forming material by exposing at least a part of the surface of said substrate to said plasma comprising said coating forming material in multiple successive passes within said treatment space by moving said substrate and/or said at least first and/or second electrode, wherein the generation of the plasma and said introduction of said coating forming material into said plasma are carried out without stopping between successive passes, wherein the number of said multiple successive passes amounting to 40 at least, and wherein the plasma polymerization of said coating forming material results in formation of nano-sized globular structures on the exposed part of the surface of the substrate.