Method for producing prussian blue/polypyrrole composite coatings with stable electro chromic transition
SUBSTANCE: invention relates to methods for preparation of stable electrochromic coatings based on Prussian blue and a conductive polymer component. It can be used for production of electrochromic coatings on optically-transparent electrodes for architectural, building and automotive applications. Disclosed a method for production of Prussian blue- polypyrrole nanostructured composite coating with stable redox- and electrochromic transition on the surfaces of optically-transparent electrodes by a single-stage sedimentation in a mixed solution of ferrous nitrate (III) and hexacyanoferrate (III) as oxidising agents, and pyrrole monomer with a nitrate supporting electrolyte as a reducing agent with pH 1.0±0.2, within 48 hours.
EFFECT: invention provides a simple single-stage method for production of Prussian blue- polypyrrole electrochromic nanostructured composite coatings on optically-transparent electrodes.
2 cl, 4 ex
SUBSTANCE: method of modulating light includes forming a magnetoplasmon crystal based on a periodically nanostructured dielectric array with a spatial period d, sputtering thereon layers of ferromagnetic and noble metals, as well as dielectrics, illuminating the magnetoplasmon crystal with light and applying a magnetic field. Modulation of the intensity of TM polarised reflected light is carried out using a periodically nanostructured film of ferromagnetic metal with thickness h=50-200 nm. The light source used is TM polarised electromagnetic radiation which falls on the surface of the magnetoplasmon crystal at an angle which corresponds to excitation of surface plasmon polaritons. An alternating magnetic field is applied in the form of equatorial Kerr effect.
EFFECT: reduced thickness of the magnetooptical modulator.
FIELD: physics, optics.
SUBSTANCE: invention relates to optoelectronics. The method of generating electromagnetic radiation in the terahertz range comprises interaction of directed exciting radiation with the active medium of a sample and obtaining secondary electromagnetic radiation. The active medium of the sample used is material with topological insulator properties, wherein excitation is carried out with pulsed radiation with exciting pulse duration τ=10-12-10-14 s, pulse energy Epul=10-5-10-2 J and wavelength λexc=350-5000 nm, wherein the exciting radiation is directed on the plane of the sample with active medium at an angle α≠90°. The active medium used can be a thin film or crystal of bismuth selenide (Bi2Se3) or bismuth telluride (Bi2Te3). The detecting element used can be zinc telluride (ZnTe).
EFFECT: enabling monitoring and control of generation parameters when exciting materials with topological insulator properties.
5 cl, 2 dwg
SUBSTANCE: method of making a tinted article, having a tinting film, includes joining polymer sheets. The polymer sheets used are two sheets of a transparent material, one of which is coated with an elastic polymer in the form of points with size of less than 30 mcm, followed by polymerisation thereof, joining with another sheet by stacking, followed by sealing the periphery and feeding into the space between the films through a valve a coloured optically transparent working fluid for controlling the degree of light transmission through inlet and outlet thereof. During inlet of the working fluid, light transmission decreases and during outlet of the working fluid, light transmission increases.
EFFECT: controlling the degree of light transmission, which means improving optical characteristics of surfaces depending on operating conditions.
2 cl, 2 ex
SUBSTANCE: generator of subteraherz and teraherz emission includes a laser emission source, an electrical circuit with voltage sources and an impedance load, and an optically active element. The latter is provided with an additional field transistor provided in a gate area with a semiconductor layer with a short life time of photoexcited charge carriers, a gate of transparent or semi-transparent material; electric displacement is supplied to a sink and to a source of a conductive channel of the field transistor.
EFFECT: increasing output power.
SUBSTANCE: invention is related to edge-lit systems. The edge-lit system comprises an emission source in the forms of at least one light-emitting diode; the lower mirror with reflective coating; the upper reflective and diffusion film placed above the lower mirror and edge mirrors at four sides thus forming an air-filled waveguide together with the lower mirror and the upper reflective and diffusion film. The upper reflective diffusion plate is made of material with volume-diffuse scattering and reflective coating applied to its lower side; it has a number of transparent or partially transparent areas.
EFFECT: improving brightness and uniformity of lighting.
4 cl, 6 dwg
SUBSTANCE: integrated vision and display system contains a layer generating display image; image detector is designed for visualisation of infrared radiation in the narrow range of angles in regard to display surface normal and it includes reflection of one or more objects at the display surface or close to it; radiator of the vision system is designed to radiate infrared radiation for the purpose of objects lighting; light waveguide passes visible and infrared radiation and has the opposite upper and/or lower surfaces designed to receive infrared radiation from the vision system radiator, to guide infrared radiation by TIR from the upper and lower surfaces and projection of infrared radiation to an object outside limits of the narrow range of angles in regard to display surface normal.
EFFECT: improving functionality and small size of the device.
14 cl, 14 dwg
FIELD: physics, optics.
SUBSTANCE: system for scanning collimated light comprises an optical waveguide, a system for inputting light into the first end of the optical waveguide and a controller for controlling position along the first end of the optical waveguide. The optical waveguide comprises a first end, a second end opposite the first end, a viewing surface which continues at least part between the first end and the second end, a back surface opposite the viewing surface, and an end reflector located at the second end of the optical waveguide. The end reflector comprises one or more polyhedral lens structures and a diffraction grating.
EFFECT: high efficiency of scanning collimated light.
13 cl, 16 dwg
SUBSTANCE: to obtain infrared radiation an electrical signal is sent to the input of the preemphases unit. The preemphases unit changes the signal form by taking the 8-th root of it. The changed signal is then sent to the input of the infrared radiation source.
EFFECT: simplification and acceleration of signal processing.
SUBSTANCE: group of inventions relates to lighting engineering. Backlight lighting device (24) is equipped with backlight base (22) with mounted LED unit (32) and a light-conducting plate (20), which lateral surfaces are light-receiving surfaces (20a). The LED unit (32) is faced to light-receiving surfaces (20a) of the light-conducting plate (20). The backlight base (22) has guide pins (40) protruding from the base plate surface (22a), at that the light-conducting plate (20) has concave connecting sections (38) at positions faced to the guide pins (40), while the guide pins (40) are coupled to the connecting sections (38). Lateral surface of each guide pin (40) is equipped with a through hole (40a), which passes through the above lateral surface.
EFFECT: prevention or exclusion of uneven brightness of the light emitted through the light-conducting plate.
9 cl, 12 dwg
SUBSTANCE: multielement terahertz radiation generator includes test sample, femtosecond laser, multielement emitter where element emitter is made in the form of crystal semiconductor with sputtered metal mask forming sharp laser illumination gradient for crystal semiconductor layer. On the boundary of illuminated and shaded parts of semiconductor layer, a sharp gradient of photoexcited charge carrier concentration is formed parallel to the semiconductor surface. In addition the device includes elliptical mirror forming a focused terahertz radiation beam, while multielement emitter includes a raster of cylindrical microlenses distributing laser radiation between element emitters and illuminating only those semiconductor layer areas involved in terahertz radiation generation. The metal mask is made in the form of flat metal stripes.
EFFECT: increased power of terahertz radiation, possible application of small test samples.
3 cl, 2 dwg
SUBSTANCE: invention relates to chemical industry and concerns a method for producing an additive in the form of hard fibres, wherein the said additive is storage stable and based on the eco-friendly polyamide acid; the said additive in a salt state can be used for the production of composite materials and metal coatings. The method for polyamide acid salt production comprises forming a polyamide acid fibre cocoon by mixing 13.0-13.5 wt % polyamide acid solution in dimethylformamide with distilled water while stirring at the rate of 50 rev/min. The obtained cocoon is washed with distilled water, and separated into individual fibres to dry in the air and then at 120-130°C for 60 min in a cabinet drier, in a vacuum thermostat at 79-81°C and a pressure of 1 atm. to reduce dimethylformamide content down to 3.68 wt %, followed by dissolving the fibres in a mixture of N-methylpyrrolidone, monoethanolamine and water to obtain the said salt. A method for producing coatings based on fluoropolymers with polyamide acid salt or polyamide acid-based lacquer.is also disclosed.
EFFECT: storage stable polyamide acid in the form of fibres, improved quality of polyamide acid and composite materials based on fluoropolymers and polyamide acid, improved antiadhesive and antifriction coatings.
3 cl, 2 tbl, 2 ex
SUBSTANCE: invention relates to a thermally reversible hot-melt adhesive which is isocyanate-free. The thermally reversible hot-melt adhesive contains at least one multifunctional diene monomer/prepolymer L-(X)P and at least one multifunctional dienophile monomer/prepolymer L-(Y)q, where at least one or P and Q is greater than 2.1. The thermally reversible composition can also be used as a priming coat.
EFFECT: thermally reversible hot-melt adhesive can be repeatedly heated and cooled without deterioration of performance characteristics of the adhesive.
20 cl, 4 tbl
SUBSTANCE: invention relates to a moisture-curable resin based on aliphatic isocyanates. The moisture-curable resin contains a material with aliphatic isocyanate functional groups, which contains a reaction product of hexamethylene diisocyanate and a hydroxy-functional ether compound, and a material with cycloaliphatic isocyanate functional groups, which contains a reaction product of isophorone diisocyanate and a monofunctional alcohol, wherein the weight ratio of the material with cycloaliphatic isocyanate functional groups to the material with aliphatic isocyanate functional groups ranges from 95:5 to 50:50. A method of improving cold lap resistance, bubbling resistance and weather resistance of the coating composition which contains said moisture-curable resin includes a step of preparing a composition which does not exhibit significant cold lap when deposited with thickness of the moist film of at least 6 mil, and where the coating composition does not exhibit bubbling during curing to thickness of the dry film of at least 6 mil.
EFFECT: invention improves cold lap resistance and bubbling resistance of the coating composition and improves film-forming and coating properties of the resin.
19 cl, 7 dwg, 16 tbl, 14 ex
SUBSTANCE: invention relates to surface coatings with anti-icing properties, moulded articles and devices having said coating, methods of producing and using said coatings, moulded components and devices. The coating contains a matrix and an active polymer incorporated into said matrix, wherein said active polymer consists of certain structural links and is covalently bonded to the matrix, selected from a group consisting of sol-gel and polymer layers.
EFFECT: said coatings have excellent anti-icing properties.
15 cl, 2 dwg, 11 tbl
SUBSTANCE: disclosed is a method of applying a coating on a substrate. The method includes applying a primer composition on part of the substrate. The primer contains a self-emulsifying polyester microgel.
EFFECT: invention provides a coating with good adhesion.
11 cl, 14 tbl, 3 ex
SUBSTANCE: invention relates to a method of electroplating a substrate that has not undergone pretreatment. The method includes (a) contacting at least part of substrate material with a solution containing a copper source and water, where the solution is substantially free of a group IIIB metal source and a group IVB metal source, (b) bringing at least part of the substrate into contact with an electroplating composition containing (i) a film-forming resin and (ii) a yttrium source. Also described is a coated substrate and a method of electroplating a substrate, which includes (a) contacting at least part of substrate material with a solution containing a copper source, water and at least one substance selected from acids and surfactants, followed by contacting at least part of the substrate with an electroplating composition.
EFFECT: corrosion resistance of the substrate material without a compulsory pretreatment step.
20 cl, 9 tbl, 10 ex
FIELD: physics, optics.
SUBSTANCE: invention relates to the system of sunlight reflecting coatings. The system of coatings comprises two layers of coatings. The layer of the first coating a) has CIELAB L* value no more than 40 and includes: i) film-forming resin and ii) the pigment absorbing visible radiation and transparent for infrared radiation. The layer of the second coating b) is applied below, at least, a part of a layer of the first coating and includes: i) film-forming resin; ii) the pigment of thin scales of metal or alloy of metal reflecting the infrared radiation, and iii) the pigment absorbing visible radiation and transparent for infrared radiation. The layer of the first coating and the layer of the second coating has contrast ration (L*second/L*first) from 0.8:1 up to 1.6:1. The system of coatings has % of the full solar reflection (FSR) of, at least, 25%, and the layer of the second coating has % FSR of, at least, 25%.
EFFECT: invention allows to create the system of sunlight reflecting coatings.
16 cl, 7 tbl
SUBSTANCE: invention relates to protective coatings. Composition of protective coating includes acryl resin, reactionable polyorganosiloxane or its initial reagent, hexamethyldisiloxane and system of solvents.
EFFECT: invention provides preservation of external looks of coloured surfaces after durative influence of weather conditions, as well as at regular cleaning and washing, in particular leaves "water spots" invisible.
25 cl, 2 tbl
SUBSTANCE: invention relates to composition for coating of different substrates, including metal substrates of packing products, for example, containers for food products or drinks, and method of obtaining such packing products. Product contains: metal substrate of container for food products or drinks or its parts and coating, applied on, at least, part of metal substrate surface, with coating containing: film-forming quantity of polyether polymer, which has one or more segments of the following formula I: -O-Ar-(Rn-Ar)n-O-, where each Ar independently represents phenylene group, each n independently stands for 0 or 1, R, if present, represents bivalent organic group, which has molecular weight lower than 500 and two atoms of oxygen, each represents ether oxygen, with temperature of glass transition (Tg) constitutes at least 70°C, with composition for coating is, at least, in fact, free from bisphenol A and diglycidyl ether of bisphenol A, and polyether polymer is product of reaction ingredients, which include polyepoxide and polyatomic phenol.
EFFECT: invention makes it possible to obtain coating with stability against albication, corrosion, stability to etching, and high adhesion to metal substrate.
24 cl, 4 tbl
SUBSTANCE: invention relates to obtaining protective coatings resistant to aggressive media with improved deactivating ability, intended for application in chemical, petroleum refining industry. Composition contains polyfluorinated copolymer of vinylidenefluoride, hexafluoropropylene and allylfluorosulphate, eposy diane resin, solvent, filling agent and hardening agent. As filling agent composition contains substances, selected from the group, including soot, fluoroplast, aerosil or their mixtures.
EFFECT: claimed polymer composition is hardened at room temperature, possesses high resistance to aggressive media and improved deactivating ability, as well as high adhesive and physical-mechanical properties.
4 cl, 3 tbl, 5 ex
SUBSTANCE: first step includes obtaining low-hydroxylated insoluble fullerenols by reacting concentrated fullerene solution in o-xylene with aqueous ammonia solution in the presence of a tetrabutylammonium hydroxide phase-transfer catalyst at 35-40°C. At the second step, the obtained low-hydroxylated insoluble fullerenols are hydroxylated to transform them into a water-soluble form by mixing with 6-15% aqueous hydrogen peroxide solution and heating for 4-5 hours at 65°C. Water-soluble fullerenols are then precipitated from an alcohol-containing solution.
EFFECT: simplifying the method while preserving quality characteristics and full extraction of the end product.
2 cl, 1 dwg, 4 tbl, 3 ex