Atmospheric Pressure Deposition of Thin Functional Coatings: Polymer Surface Patterning by DBD and Post‐Discharge Polymerization of Liquid Vinyl Monomer from Surface Radicals

• DOI: 10.1002/ppap.201100210
• Publication Date: 2012-09-12T16:15:38Z
• Authors: Jean‐Pascal Borra; Alexandre Valt; Farzi Arefi‐Khonsari; Michael Tatoulian
• Keywords: [SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering; [SPI.PLASMA]Engineering Sciences [physics]/Plasmas; 0103 physical sciences; [SPI.PLASMA] Engineering Sciences [physics]/Plasmas; [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering; [SPI.MAT] Engineering Sciences [physics]/Materials; 01 natural sciences; [SPI.MAT]Engineering Sciences [physics]/Materials

AbstractWe present a route for grafting polyacid and polyether coatings on polymers by post‐discharge polymerization of liquid vinyl monomer. Surface modifications of polymer films by Micro‐Discharges in air Dielectric Barrier Discharge (MD, DBD) are depicted with sub‐micrometer craters homogeneously distributed. Both the energy per MD and the power density are critical to avoid thermal film deformation. Homogeneous surface composition is related to the DBD energy density. The polymerization mechanism is depicted from yields versus DBD energy density and time of exposure to air between DBD and monomer deposition. Both parameters control the surface density of radicals and peroxides, triggering the post‐DBD polymerization with 80 and 73% of monomer functionality remaining in acid and ether coatings, respectively. The effect of deposition conditions on coatings properties is shown as well as the stability of coatings upon washing. magnified image