METHOD OF PLASMA POLYMERIZATION UNDER LOW-STRESS CONDITIONS FOR MECHANICALLY STABLE SUPERHYDROPHOBIC NANOSTRUCTURED COATING Russian patent published in 2023 - IPC B05D5/08 B05D1/00 B05D1/34 C09D183/04 C09D133/16 

FIELD: polymerization.

SUBSTANCE: atmospheric pressure plasma polymerization methods for deposition of superhydrophobic coatings, as well as superhydrophobic coatings obtained by atmospheric pressure plasma polymerization method. The method for depositing a superhydrophobic coating on a substrate includes the steps of providing a first precursor containing fluoroacrylate monomers, fluoroalkyl acrylate monomers, fluoromethacrylate monomers, fluoroalkyl methacrylate monomers, fluorosilane monomers, or combinations thereof, and introducing this first precursor into a plasma gas in liquid form, atomized or nebulized, or vapor form; providing a second starting material containing cyclosiloxanes and introducing this second starting material into the plasma gas in liquid form, atomized or nebulized, or vapor form; introducing a plasma gas containing the first and second raw materials into the treatment area by jointly injecting the aforementioned first and second raw materials into the treatment area; and creating an atmospheric pressure plasma discharge in the aforementioned processing area to deposit on the aforementioned substrate a superhydrophobic coating produced from the aforementioned co-injected first and second raw materials. In this case, the plasma discharge has a power density of at least 0.05 W⋅cm^-2 and not more than 100 W⋅cm^-2, where the plasma discharge is a dielectric barrier discharge in which an alternating voltage is applied to the treatment area. Also, a superhydrophoric coating of a substrate formed by a plasma polymerization method at atmospheric pressure is described.

EFFECT: providing a durable superhydrophobic coating with high resistance to abrasive influences and high elasticity, with the separate introduction of two initial substances into the plasma-forming gas, followed by joint injection into the treatment zone, provides more accurate control of the mixture of initial substances and allows you to controllably change the composition of the mixture during a single coating spraying process.

14 cl, 9 dwg, 2 ex