Method of obtaining antibiotic coating on filtering material
FIELD: medicine, pharmaceutics.
SUBSTANCE: invention relates to the field of obtaining and production of filtering materials for purification of air of industrial premises based on polymer fibres, possessing antibiotic properties. Synthesis of a polymer on a filtering material in low-temperature glow discharge plasma in adamantane vapours is performed. First, a chamber with the filtering material is vacuumed, argon is supplied and gas discharge purification of material is carried out. After purification the chamber is re-vacuumed and vapours of adamantane are input with further ignition of the glow discharge to obtain a thin coating on the material surface.
EFFECT: invention makes it possible to render antibiotic (antifungal) properties to the surface of the filtering material.
The invention relates to the field of reception and production of filter materials based on polymer fibers having antibiotic properties.
A method of obtaining material on the porous metal substrate, the selective layer of ceramics by drying at 200°C and compression at a temperature of 0.3-0.4 from the melting temperature of the powder (patent RF №2424083 from 20.07.2011, BI No. 20). However, this method is used for the ceramic material using solutions.
A method of obtaining a composite material consisting of a non-woven layer containing ion-exchange fiber-based graft copolymer polycaproamide with toporbottom the mass ratio knitted canvas and non-woven layer 1:(1.3 to 1.6) (RF patent 22307034 from 27.09.2007, BI No. 2), but this method of obtaining is designed to improve the functional properties of a composite material, and the material does not possess antibiotic properties.
A method of obtaining material containing as the basis of a non-woven fibrous material obtained by the method of blowing of molten polypropylene, polycarbonate and polyethylenterephtalate with the application on the basis of polymeric fibrous material salt solution of tin (II) hydrolysis to tin dioxide and subsequent heating in a microwave oven (patent RF №401153 from 10.10.2010, BI No. 28). The technical result of this decision is to obtain a material having sorptive properties towards various impurities. However, data obtained by way of filter materials do not possess antibiotic properties and can only be used for the purification of liquids.
Known for the synthesis of polymers in a glow discharge in pairs adamantane (Andreeva A.V., Sign V., Safonov, A.A. and other Polymerization vapor adamantane in a glow discharge // proceedings of Samara scientific center of RAS. Vol.13, No. 4, p.84-90, 2011, Samara). However, this method of synthesis is carried out for coating onto a non-conductive fabric and the electrodes, and the filter material is not used.
A method of obtaining a polymer coating using plasma-chemical synthesis (patent EA 10879 B1 from 30.12.2008). However, not specified, based on a monomer produces a polymer and that the latter is applied to the filter material.
A method of obtaining coatings on implant surfaces (patent US 20050220840 A1 from 06.10.2005). However, this method does not provide a coating on the filter material.
The closest in technical essence and the achieved result is the antiseptic way of processing the surface of a polymeric material, which consists in the formation of the surface is ti products antiseptic coating through biostorage of the drug on the basis of the nanosized powder of bentonite, intercalated by ions of silver or copper in a solution of a polymeric binder, and the formation of antiseptic coating of polymeric material on the basis of silicone rubber modification in an oxygen plasma (RF patent No. 2416435 from 20.04.2011, BI No. 11).
The technical result of the present invention to provide antibiotic cover to the filter material from the vapor adamantane in glow discharge plasma. The technical result is achieved in that the first chamber with filter material vaccum, serves argon and conduct a discharge of cleaning material; after cleaning the camera again vaccum and putting a pair of adamantane with subsequent ignition of the glow discharge for synthesis of the coating on the surface of the material.
A method of manufacturing the antibiotic coating on the filter material is carried out as follows. The filter material is placed in a chamber abnormal glow discharge of low pressure along the boundary of the positive column of a glow discharge between the electrodes, after which the vacuum chamber to a residual pressure of not higher than 10-3PA. Then the chamber was filled with argon to a working pressure of 80 PA. Lights glow discharge parameters are calibrated discharge (density current through the electrodes 2-5 a/m2), mount the Oia discharge 50-150 seconds. The camera then re-vacuumized to a pressure of 10-3PA, and then in the camera nauseosa pair of adamantane at a pressure of 15-100 PA. The electrode system elasmobranchii serves voltage 50 Hz - 20 kHz and strike a plasma glow discharge with a current density of discharge of 0.1 to 30 a/m2. The synthesis of the antibiotic coating is carried out until the thickness of 20-50 nm. The processing time is determined by the choice of vapour pressure adamantane, density and frequency of the discharge current.
The objective of the invention is to make the surface of the filter material antibiotic (antifungal) properties.
This problem is solved in such a way that according to the invention the surface of the filtering material is processed in the low-temperature glow discharge plasma of low pressure in pairs adamantane, resulting in a thin surface antifungal coating.
The applicant is unknown use in science and technology of the distinctive features of the proposed method with the achievement of the technical result.
Examples of specific performance of manufacturing the antibiotic filter material
The coated sample is placed in a vacuum chamber between the electrodes of the substrate. Is pumping atmospheric air to a pressure of 10-3PA, after which the camera napus the W argon to a working pressure of 80 PA. Lights glow discharge parameters are calibrated discharge current density through the electrode 3 a/m2), the burning time of discharge 100 seconds. The camera then re-vacuumized to a pressure of 10-3PA and then filled with the original connection - adamantane, to establish the working pressure of 80 PA. Translation of adamantane from the crystalline state to the gaseous is thermoresistive fusion. Adamantane in a gaseous state - a well-volatile compound that needle through the leak flows into the working chamber. The process takes place in a reactor operating in flow mode. The processing of material in the gas discharge varies in the range of 200-600 seconds. Density values of the discharge current is selected in the range from 1 to 15 a/m2the greatest values of the deposition rate observed in the range of 2-5 a/m2. The coating obtained has a more pronounced antifungal properties against Aspergillus niger in the case of processing for 300 seconds.
The advantages of the inventive method compared to known are the following:
1. Simple technological process of obtaining coverage.
2. The effectiveness of the process.
3. The result is a coating with antibiotic properties with respect to the surface of the used filter material.4. Minor duration of the process.
The obtained filter material is used for manufacturing of air filters industrial premises.
The method of obtaining the antibiotic coating on the filter material, comprising the synthesis of the polymer in the low-temperature glow discharge plasma in pairs adamantane, characterized in that the first chamber with filter material vaccum, serves argon and conduct discharge the cleaning, after cleaning the camera again vaccum and putting a pair of adamantane with subsequent ignition of the glow discharge for synthesis of the coating on the surface of the material.
SUBSTANCE: invention relates to obtaining carbon nanostructures. In method of obtaining carbon nanostructures, which includes ignition in vacuum chamber of glow discharge under condition of constant electric current, hydrocarbon gas is supplied into near-cathode region of vacuum chamber in discharge channel in axial and tangential way, and hydrocarbon gas processing is performed under certain parameters of glow discharge. In the second version of the method mixture of inert gas with carbon porder particles is axially supplied into near-cathode region of vacuum chamber into discharge channel with supply of inert gas in tangential way. In device for obtaining carbon nanostructures, containing vacuum chamber with placed in it electrodes, direct current power supply unit, connected to anode and cathode, vacuum chamber has first tangential inlets into near-cathode region for hydrocarbon gas supply and second axial inlet from the cathode side for hydrocarbon gas supply, with electrodes being placed at R=20÷100 mm distance from each other in vacuum chamber. In the second version of device, vacuum chamber has first tangential inlets into near-cathode region for inert gas supply, and second axial inlet from the cathode side for supply of inert gas mixture with carbon powder particles.
EFFECT: invention makes it possible to obtain carbon particles in form of powder, which considerably extends their application, to simplify device and method for obtaining carbon nanostructures, as well as to increase coefficient of efficiency.
6 cl, 4 dwg
SUBSTANCE: device for production of magnetic nanoparticles on a substrate comprises a vacuum chamber with a cathode arranged on it with a target and an anode, where the substrate is placed, a pumping system, a vacuum metre and a system of plasma-forming gas supply. The device also comprises a manipulator for movement of the substrate with deposited nanoparticles into a gap of a magnetic conductor of a permanent magnet or an electromagnet used to magnetise nanoparticles in the specified direction after their deposition or after etching of the substrate surface with deposited nanoparticles. The method to produce magnetic nanoparticles on the substrate includes placement of the initial substrate inside the vacuum chamber, pumping of the vacuum chamber, supply of the plasma-forming inert gas, plasma ignition, target bombardment and performance of a cycle including deposition of nanoparticles onto the substrate surface, movement of the substrate by means of the manipulator in the gap of the magnetic conductor, where the magnetic field is created with the help of the permanent magnet or the electromagnet and magnetisation of deposited nanoparticles in the specified direction. The specified cycle is repeated to produce the required average size of nanoparticles.
EFFECT: magnetic nanoparticles of specified size are produced with specified density of scatteing on substrate surface and with specified shape, and also amorphous nanoparticles are produced.
11 cl, 8 dwg, 1 ex
FIELD: machine building.
SUBSTANCE: procedure consists in preparing surface of item, in arranging item and current conducting material in treatment zone, in creation of vacuum, in supply of negative potential separately onto item and current conducting material, in excitation of vacuum arc on current conducting material and in generation of plasma, in bombardment, in cleaning and in heating item with ions of current conducting material, in accumulation and diffusion of ions on surface of item in medium of reaction gas and in forming coating. Also, before placement of item in the treatment zone a layer of alloy is applied on its surface; this layer of alloy is based on nickel and has thickness 4-10 mcm. As current conducting material there is used chromium or its alloy. Simultaneously with accumulation and diffusion of ions of current conducting material surface is bombarded with ions of inert gas of 10-40 keV power.
EFFECT: raised resistance of metal item to salt corrosion, increased heat resistance at maintaining erosion resistance.
3 cl, 1 tbl, 3 ex
SUBSTANCE: invention concerns metallurgy and can be used in aircraft and power turbine construction for protection of turbine blades against high-temperature oxidation and sulphide corrosion. Product and alloy on the basis of aluminium are located in treatment area. In the treatment area it is created vacuum, it is supplied negative potential to product and separately to alloy on the basis of aluminium. It is implemented forced cooling of alloy. It is strike on it vacuum arc, burning in steams of this alloy with formation of plasma alloy on the basis of aluminium. It is implemented bombardment of product surface by plasma ions of alloy on the basis of aluminium for cleaning and heating of product surface. Diffusion and collection of this alloy on the surface of product is implemented with specific additional weight (20-140) g/m2 at negative potential on product, chosen in limits from floating potential till - 50 V. Then it is implemented cooling of product in vacuum. Product heating in vacuum for forming of diffusion aluminide coating is implemented out of its treatment area. Then it is implemented final polishing of product surface of diffusion aluminide coating. In the capacity of alloy on the basis of aluminium it is used alloy containing two or more alloying elements from row: silicon, yttrium, boron, nickel, cobalt, chrome. Alloy on the basis of aluminium before location into treatment area is soldered to water-cooled mandrel.
EFFECT: increasing of quality of aluminide coating at the expense of reduction of micro-dripping phase part in plasma stream of alloy on the basis of aluminium and at the expense of increasing of cyclical high-temperature strength, heat resistance and durability of coating.
11 cl, 1 tbl, 6 ex
FIELD: metallurgy, namely chemical and heat treatment of metals and alloys, namely ion nitriding in plasma of glow discharge, machine engineering, namely surface hardening of machine parts, possibly of complex-configuration parts, cutting tools and die fitting.
SUBSTANCE: at cleaning treated part in mode of cathode sputtering, pulse duration of negative voltage applied to article is discretely and successively increased by two steps at constant pulse repetition frequency. At first step pulse has width 18 - 20 ms sufficient for achieving article temperature 45 - 50°C. At second step pulse width is in range 38 - 40 ms for achieving article temperature 140 - 150°C. Then at heating in glow discharge for achieving saturation temperature, pulse width is in range 75 - 80 ms and it is sustained in such range during the whole process of saturation.
EFFECT: intensified cleaning process, enhanced quality of parts, especially of complex-configuration parts due to minimum arc generation at initial stage of cleaning process in mode of cathode sputtering.
1 tbl, 1 ex
FIELD: textiles, paper.
SUBSTANCE: method comprises evacuation and application of a thin metal layer by method of magnetron sputtering on a polymer film which is then bonded to a textile fabric with the metallic layer inwards or outwards, and evacuation of the polymer film is carried out before the pressure is (1-10)×10-5 mm Hg.
EFFECT: conditions are provided for creation on the textile material from any fibers and filaments of solid metal layer having electrical conductivity and shielding properties.
3 tbl, 3 ex
SUBSTANCE: method involves reactive magnetron sputtering of metal target from alloy of indium with stannum and deposition in working chamber of coating on dielectric substrate in atmosphere of mixture of gases, which contains inert gas and oxygen with ion enhancement of coating deposition process with ion flow; coating is deposited on polymer film at value of average density of current of magnetron discharge on sputtered target surface of 180-200 A/m2 and ion enhancement of coating deposition process with ion flow with energy of 20-40 eV in two stages: first in mixture of gases, which contains 20-22 vol. % of oxygen; then, in mixture of gases, which contains oxygen of not less than 60 vol. %, provided that t1:t2=2-3 ratio is fulfilled, where t1 - time for carrying out the first stage of coating deposition, t2 - time for carrying out the second stage of coating deposition.
EFFECT: use of the proposed method allows increasing service life of transparent electrodes in composition of electrochromic material, as well as improving reliability and life of optically active electrochromic glasing material.
1 tbl, 7 ex
SUBSTANCE: filtering elements is manufactured by ion-plasma cathode sputtering by any of these metals Ti, Zr, Hf, Cr, Al, Cu, Ni, Nb, their alloys or stainless steel onto porous polymer substrate. Substrate is placed on rotating device in processing chamber. After pumping-out of processing chamber up to pressure of (4-6)·10-5 mm Hg it is filled with argon up to pressure of (1-4)·10-4 mm Hg and treatment by low-temperature plasma is done at discharge current of 40-50 A during 30-40 minutes at temperature of -50-+150°C. Leaving source of low-temperature plasma on metal sputtering is carried out in the same temperature range. The whole process is implemented at constant substrate cooling by means of cooling medium circulation through intracavity of rotating device. Rotating device is made in the form of cylinder with rotating gear and membrane tensioner at external surface of cylinder. Cylinder is hollow and equipped with cooling system.
EFFECT: cost saving, improvement of process.
1 dwg, 1 tbl, 1 ex
FIELD: protection of the forgery-proof papers, important documents, banknotes, identification cards and other similar papers; methods of production of the protective component.
SUBSTANCE: the invention is pertaining to the protective component for protected against forgery-proof of the protected paper, banknotes, identification cards or other analogous documents, to the protected against forgery-proof paper and the important document with such protective component, and also to the method of their manufacture. On the substrate by deposition from the vapor phase sputter the multicomponent vaporizable material being transferred in the vapor phase by means of the electronic beam or heating by means of the resistance. The vapors of the being evaporated material deposit on the substrate forming on it the coating painted in the color of the noble or precious metal. The coating composition is determined by means of gagging in the reflected light and, if necessary, with correction of the possible deviations of the coating composition from the preset value by change of the power consumed for heating of the being evaporated material, and-or the power of the electronic beam.
EFFECT: the invention ensures production of the protective component effective against forgery-proof of the important papers, banknotes, identification cards or other analogous documents.
34 cl, 3 dwg, 2 ex
FIELD: chemical industry; other industries; methods and the devices for production of the continuous hollow profiled polymeric pipes.
SUBSTANCE: the invention is pertaining to the method of production of the continuous hollow profiled products made out of the polymers, in particular, the polymeric pipes. The method includes the stages of production of the polymeric pipe, the stage of the leveling of the surface of the pipe and the stage of deposition of the metallic coating. At the stage of the leveling of the surface of the pipe at first they are leveling of the pipe surface and then deposit the leveling layer. The metal of the coating is deposited by the vacuum evaporation. The In the capacity of the material used for making the leveling layer they use the liquid polymer, which one at the stage of drying is dried for transformation of the liquid polymer into the solid state. The polymer together with the tightly connected to it metallic layer form the gas-impermeable layer. The technical result of the invention consists in the increase of the productivity of production of the hollow profiled products.
EFFECT: the invention ensures the increased efficiency of production of the hollow profiled products.
2 cl, 3 dwg
SUBSTANCE: invention relates to chemical industry, namely to obtaining synthetic zeolite of A type. Method of obtaining includes mixing natural clayey mineral-kaoline with pore-former and preliminarily annealed at 550-700°C powder kaoline, taken in quantity 10-30%. Plasticising liquid is added into obtained mixture until homogenous mass is obtained and granules are formed. Then, performed are: drying of granules, thermo-activation, hydrothermal crystallisation, washing and final drying. As pore-former aluminosilicate nano-tubes corresponding in composition to mineral kaolinite, or their mixture with wood powder is used. Hydrothermal crystallisation is realised in solution of sodium hydroxide.
EFFECT: invention ensures possibility of obtaining synthetic granulated zeolite of A type, which has high mechanic strength and adsorbing capacity by water vapours.
4 cl, 1 tbl, 106 ex
SUBSTANCE: invention relates to a lubricant composition which contains mineral oil and powdered filler obtained from evaporation and condensation of vapour in a plasma evaporator, wherein the powdered filler is a mixture of brass nanopowder with particle size of 10…30 nm, ultrafine zinc-intercalated potassium polytitanate powder with particle size of 100…300 nm and a surfactant, wherein the ultrafine zinc-intercalated potassium polytitanate powder is obtained using a chemical method, with the following ratio of components in wt %: powdered filler consisting of a mixture of brass nanopowder, ultrafine zinc-intercalated potassium polytitanate powder and a surfactant 0.2; mineral oil 99.8.
EFFECT: improved antifrictional and extreme-pressure properties of the oil.
2 ex, 2 tbl, 4 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to marking of goods. In compliance with proposed method, primary and individual barcodes are applied with non-reproducing pattern made there between. Said pattern is created by preliminary mixing of the elements of contrast colours with their subsequent sintering. Said elements are made of nanoparticles sized to 5-100 nm in conical ledge with its narrow part facing the barcode surface. Now, at least two reference points are applied thereto to create a virtual info reticle.
EFFECT: better protection against counterfeit.