Patent ID: 8414980

Claim:
A method for fabricating a structure of a polymeric material having a hydrophobic and oleophobic modification by using atmospheric plasmas, comprising steps of: (a) moving a substrate into an atmospheric plasma area, generating an atmospheric filamentary discharge plasma with a first plasma working gas, irradiating said atmospheric filamentary discharge plasma on a surface of said substrate to activate and roughen said surface to obtain a first rough surface on said substrate, and adjusting roughness of said first rough surface of said substrate by adjusting a power density of said atmospheric filamentary discharge plasma and adjusting a period of time of said irradiating of said atmospheric filamentary discharge plasma; (b) exposing said substrate to air after being irradiated by said atmospheric filamentary discharge plasma to obtain highly active peroxide on said first rough surface of said substrate; (c) immersing said substrate in a solution of a fluorocarbon compound and processing a first stage of graft of a fluorocarbon monomer or oligomer on said substrate to obtain a grafted fluorocarbon monomer or oligomer layer on said first rough surface of said substrate, wherein said grafted fluorocarbon monomer or oligomer layer has a second rough surface having the same roughness as that of said first rough surface of said substrate; (d) processing a second stage graft of a fluorocarbon functional group to said grafted fluorocarbon monomer or oligomer layer by generating a carbon tetrafluoride plasma from a second plasma working gas and irradiating said carbon tetrafluoride plasma on said grafted fluorocarbon monomer or oligomer layer to obtain a grafted fluorocarbon functional group layer on said grafted fluorocarbon monomer or oligomer layer; and (e) curing and drying said substrate to generate cross-links in both said grafted fluorocarbon monomer or oligomer layer and in said grafted fluorocarbon functional group layer and between said grafted fluorocarbon monomer or oligomer layer and said grafted fluorocarbon functional group layer.