METHOD OF ANTI-ADHESIVE, BIO-COMPATIBLE, AND BACTERIOSTATIC COATING ON THE BASIS OF CARBON APPLICATION FOR MEDICAL PURPOSE PRODUCTS FROM MATERIAL WITH THERMOMECHANICAL SHAPE MEMORY Russian patent published in 2018 - IPC C23C14/32 C23C14/02 C23C14/06 C23C14/12 A61L27/30 

FIELD: technological processes.

SUBSTANCE: invention relates to an antiadhesive, biocompatible and bacteriostatic coating based on carbon application on products of medical use from a material with a thermomechanical shape memory. Product surface is preliminarily cleaned by ion etching in a sealed chamber. Chamber is previously evacuated to a residual pressure of 9⋅10^-5…1⋅10^-6 Torr, followed by filling the chamber with argon and evacuating the chamber to a residual pressure of 1⋅10^-4…3⋅10^-3 Torr. Ion etching is performed with argon ions with an energy of 0.7–3.0 keV for 4–8 minutes. In argon filled and evacuated to a residual pressure of 1⋅10^-4…3⋅10^-3 Torr chamber the product surface is applied with coating on the basis of carbon in the form of a tetrahedral diamond type ta-C or carbine type by pulsed plasma arc spray with a pulse duration of 0.1–1.0 ms and their frequency of 0.1–30 Hz from the graphite cathode. Carbon coating with a layer thickness of 5–50 angstroms is applied per pulse using a pulsed plasma arc source of a carbon plasma with a discharge voltage of 150–810 V. For products made of a material with a thermomechanical shape memory with a flexural strength of 25–85 N/mm and the modulus of elasticity of 15–20 GPa is coated on the basis of the intermetallic compound of titanium nickelide or from the alloy of the copper system – 14 wt. % of aluminum – 4 wt. % of nickel.

EFFECT: technical result consists in providing high biological compatibility in various physiological environments of the patient's body, prevention of the bacterial biofilm formation on the surface of a medical device, in ensuring high anti-adhesiveness and bacteriostaticity of the implanted medical device surface in various physiological environments of the patient's body, as well as ensuring the implanted medical device surface reliable protection from the material with thermomechanical shape memory against the occurrence of infection processes.

1 cl, 3 ex