790results about "Electrolytic organic material coating" patented technology

The present invention provides a device having at least one constriction that is sized to permit translocation of only a single copy of the molecule. The device has a pair of spaced apart sensing electrodes that border the constriction, which may be a nanopore. The first electrode is connected to a first affinity element and the second electrode is connected to a second affinity element. The first and second affinity elements are configured to temporarily form hydrogen bonds with first and second portions of the target molecule as the latter passes through the constriction.

A ceramic coating is formed on a conductive article by immersing a first anodic electrode, including the conductive article, in an electrolyte comprising an aqueous solution of alkali metal hydroxide and an alkali metal silicate, providing a second cathodic electrode in contact with the electrolyte, and passing an alternating current from a resonant power source through the first electrode and to the second electrode while maintaining the angle φ between the current and the voltage at zero degree, while maintaining the voltage within a predetermined range. The resulting ceramic coated article comprises a coating which includes a metal, silicon, and oxygen, wherein the silicon concentration increases in the direction from the article surface toward an outer surface of the ceramic coating surface layer.

A bipolar plate for use in a proton exchange membrane fuel cell having an electrically conductive polymer coated on at least one region of a surface of the plate in contact with a flow field. The coated region is hydrophobic or hydrophilic as compared to an uncoated region of the surface to prevent liquid accumulation. Electroconductive polymer coatings are applied by electrochemical polymerization.

A complimentary polymer or “dual-polymer” electrochromic device and methods of preparing the same are provided.

The invention relates to a method for preparing a super-hydrophobic surface with metal corrosion protection and self-cleaning functions, which comprises the following steps: 1) washing a metal or an alloy substrate clean by using acetone, deionized water and ethanol sequentially; 2) using the cleaned metal or the alloy substrate as an anode and a cathode respectively and putting the anode and the cathode into a fatty acid CH3(CH2)n-2COOH electrolyte solution with the concentration of between 0.001 and 0.5 mol per liter, wherein n is equal to between 10 and 14; and applying voltage of between 0.5 and 25 volts between the cathode and anode to perform an electrochemical reaction for 0.5 to 6 hours so as to deposit a layer of a fatty acid salt super-hydrophobic surface with the metal corrosion protection and self-cleaning functions on the surface of the metal or the alloy substrate serving as the cathode. The method has simple operation and low equipment requirement, is not limited by the shape of a substrate, is easy to achieve industrialization, and has comparatively wide practical value.

A method of electrolytically depositing a pharmaceutical coating onto a conductive osteal implant. The implant is submerged into an electrolytic cell containing an electrolysis solution of the pharmaceutical and acts as a cathode. When current is applied to the electrolytic cell, the pharmaceutical coating forms on the implant. The pharmaceutical can comprise bisphosphonates, including calcium salts. The implants can comprise any conductive material suitable for use as an osteal implant. The implants can also be electrolytically coated with calcium phosphate before coating with a pharmaceutical.

A plating product comprises a matrix material and plated metal layers on the surface thereof; from the inner layer to the outer layer, the plated metal layers comprise a Cu layer, a Ni layer and a Cr layer in sequence, wherein the plated metal layers comprise a middle plating layer which is positioned between the Ni layer and the Cr layer and made from Pd, Ru or Rh, or an alloy of any two, three or four kinds of metals Pd, Rh, Ru and Ni. The invention also provides a preparation method of the plating product; according to the plating product of the invention, the middle plating layer is positioned between the Ni layer and the Cr layer, and the middle plating layer can inhibit metal Ni from precipitating to the surface of the plating product, so that the precipitation quantity of Ni can be greatly reduced, and the precipitation quantity of metal Ni can meet the specification of no more than 0.5 Mug per cm2.week; furthermore, compared with the existing ordinary plating products, the plating product of the invention also have good surface performances such as abrasion resistance, corrosion resistance and impact resistance.

The present invention proposes a method for manufacturing an implant, in particular an intraluminal endoprosthesis, having a body such that the body has metallic material. To control the degradation in a desired time window, e.g., between four weeks and six months, the following production method is performed: a) preparing the body of the implant, and b) plasma-chemical treatment of at least a portion of the surface of the body in an aqueous solution by applying a plasma-generating electric alternating voltage to the body (5) of the implant, said voltage having a frequency of at least approximately 1 kHz, to create a first layer. The invention also relates to an implant obtainable by such a method.

An article of manufacture and a process for making the article by generating corrosion-, heat- and abrasion-resistant ceramic coatings comprising titanium and / or zirconium dioxide using direct and alternating current on anodes comprising aluminum and / or titanium. Optionally, the article is coated with additional layers, such as paint, after deposition of the ceramic coating.

New methods for the grafting of complex polymer coatings onto conducting surfaces, new grafting compositions and new substrates with grafted coating of the grafting compositions are disclosed. The method offers a new and convenient approach for the preparation of polymer coatings by electrochemically grafting and reactive crosslinking, and / or graft polymerizing.

The invention discloses a preparation method of a graphene composite anticorrosive coating. The preparation method comprises the following steps: (1) preparing an organic coating solution with a plurality of hydroxyls or amino groups; (2) preparing an oxidized graphene or modified graphene solution; (3) performing metal surface pretreatment; (4) performing electrodeposition to form an organic coating film; and (5) preparing the graphene composite anticorrosive coating. The method is simple and feasible in technology, the film forming speed is obviously improved, and the prepared coating is more compact and uniform; compared with a plain sample, the low-frequency impedance modulus value of the prepared composite coating is improved to 10<6.2> from 10<3.5> by performing electrochemical testing in 3.5wt% NaCl neutral electrolyte solution, the self-corrosion current is also remarkably reduced, and longer effective prevention effect on a matrix can be achieved. Compared with the conventional dip-coating method, the preparation method has lower requirement on the flatness of a metal surface, and controllable preparation can be effectively realized; the prepared coating is non-toxic and environment-friendly, controllable in thickness, and more compact and uniform, and more durable and stable protection effect on the metal matrix can be achieved.

An article of manufacture and a process for making the article by generating corrosion-, heat- and abrasion-resistant ceramic coatings comprising titanium and / or zirconium dioxide using direct and alternating current on anodes comprising aluminum and / or titanium. Optionally, the article is coated with additional layers, such as paint, after deposition of the ceramic coating.

A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating contains a conductive copolymer having at least one thiophene repeating unit, as well as a pyrrole repeating unit and / or aniline repeating unit.

A method includes the steps of disposing a substrate having a conductive thin film and a photo-semiconductor thin film in this order on an insulative base in an aqueous electrolyte material that solubility is lowered by a change of pH, irradiating with light a selected region of the photo-semiconductor thin film and precipitating the material to the selected region of the photo-semiconductor thin film to form a micro-lens array layer.

This invention provides a method for coating a ceramic film on a metal, which can form dense films on various bases of metals such as magnesium alloys. The formed ceramic film has excellent abrasion resistance, causes no significant attack against a counter material, and has excellent corrosion resistance. The method comprises electrolyzing a metallic base in an electrolysis solution using the metallic base as a working electrode while causing glow discharge and / or arc discharge on the surface of the metallic base to form a ceramic film on the surface of the metallic base. The electrolysis solution contains zirconium oxide particles having an average diameter of not more than 1 μm, satisfies the following formulae (1) to (3): 0.05 g / L≦X≦500 g / L (1), 0 g / L≦Y≦500 g / L (2), and 0≦Y / X≦10 (3); and has a pH value of not less than pH 7.0. In the formulae (1) to (3), X represents the content of zirconium oxide particles in the electrolysis solution; and Y represents the content of a compound of at least one element selected from the group consisting of Mg and the like, other than zirconium oxide.

An electrochemical sensor system and membrane and method thereof for increased accuracy and effective life of electrochemical and enzyme sensors.

An object of the present invention is to provide a coated article having excellent finish and corrosion resistance unaffected by a chemical conversion coating solution even if water washing after a pretreatment step is omitted and a pretreatment solution is carried as a contaminant into an electrodeposition coating composition.The present invention provides a method for forming a multilayer coating film comprising a chemical conversion coating film (F1) and an electrodeposition coating film (F2); the method comprising the following steps.Step 1: immersing a metal substrate in a coating film forming agent (1) as a chemical conversion coating solution to form a chemical conversion coating film (F1); andStep 2: without water washing, subjecting the metal substrate to electrodeposition coating using a coating film forming agent (2) as a cationic electrodeposition coating composition (I) to form an electrodeposition coating film (F2).

The present invention relates to a method for manufacturing an implant, in particular an intraluminal endoprosthesis, with a body containing metallic material, preferably iron. To control the degradation of the implant, the method comprises the following steps: a) preparing the body of the implant, and b) incorporating hydrogen into at least a portion of the structure of the implant body near the surface. Furthermore, such an implant is described.

The invention provides a method of depositing a metal organic framework material by an oxygen auxiliary cathode. The method comprises the following steps: (1) preparing a reaction precursor solution which is composed of a 5-50mM metal source, a 10-250mM organic ligand and an organic solvent; and (2) carrying out electrochemical deposition on the surface of a conducting substrate of the cathode toobtain the material. The method provided by the invention does not corrode the deposited electrode, the selecting range of the conducting substrate is wide, the prepared MOF material is regulatable inshape, dimension and thickness in nanoscale, pure, free of adding a supporting electrolyte and low in cost, and can be synthesized in one step. The metal organic framework is simple in method and operation, and industrial production is conveniently achieved.

The invention discloses a method for preparing a composite nano film on a metal surface and realizes the preparation of the composite nano film by combining electrolysis polymerization with nano self-assembly technology. The method comprises the following steps of: electrolyzing and polymerizing a macromolecular initial-layer nano film bonded with the metal surface through a covalent bond on a cleaned metal surface by an electrolysis polymerization method; and then immersing the macromolecular initial-layer nano film into self-assembly solution and assembling and forming a polymeric macromolecular nano film bonded with an initial-layer macromolecular nano film through a covalent bond by nano self-assembling technology. Due the adoption of the method, the conversion of the metal surface from hydrophilcity to hydrophobicity is realized, the less defects, strong hydrophobicity, corrosion resistance and strong adhesiveness of a modified metal surface are achieved and effective long-term protection for metal materials is realized.

The present invention generally relates to coated electrodes comprising an electrically conductive substrate and a polymeric coating, and to methods for the preparation of the same.

Belonging to the fields of electroactive functional polymer film material preparation and selective separation of ions, the invention relates to a preparation method of an ion imprinted polymer film. The invention is characterized by relating to a preparation method of an ion imprinted polymer film with an electronic control cation exchange function. The method includes: preparing a water solution of the monomer for polymer preparation, an electrolyte solution, a protonic acid solution, an imprinted ion solution and a doping ion solution, then mixing the five solutions, conducting in situ polymerization on a conductive substrate by a monopolar pulse electrodeposition method so as to synthesize imprinted ion removed ferricyanic group doped polymer film by one step. Being simple and fast to operate, the method provided in the invention needs no additional pickling step and can realize imprinted ion removal in situ. Also, the preparation conditions are mild and are easy to control. The ion imprinted polymer film prepared by the method has an electronic control cation exchange function, and can be used for selective removal of heavy metal ions in water or separation recycling of rare earth ions.

Composite materials with thermoelectric properties and devices made from such materials are described. The thermoelectric composite material may comprise a metal oxide material and graphene or modified graphene. It has been found that the addition of graphene or modified graphene to thermoelectric metal oxide materials increases ZT. It has further been found that the ZT of the metal oxide becomes effective over a broader temperature range and at lower temperatures.

The present invention concerns a lining support comprising a plurality of conductive pads ( 12 ) associated with a shared addressing contact ( 18 ) and means of selecting at least one pad to be lined by electrochemical means among the plurality of pads. In accordance with the invention, the selection means comprise means ( 20 ) of shifting a polarisation voltage, connected between the shared addressing contact and at least one pad to be addressed. Application to the lining of conductive pads.

A wet electrolytic capacitor that contains an anodically oxidized porous anode body, a cathode containing a metal substrate coated with a conductive coating, and a working electrolyte that wets the dielectric on the anode. The conductive coating contains an alkyl-substituted poly(3,4-ethylenedioxythiophene) having a certain structure. Such polymers can result in a higher degree of capacitance than many conventional types of coating materials. Further, because the polymers are generally semi-crystalline or amorphous, they can dissipate and / or absorb the heat associated with the high voltage. The degree of surface contact between the conductive coating and the surface of the metal substrate may also be enhanced in the present invention by selectively controlling the manner in which the conductive coating is formed.

The invention relates to a preparation method of a nanotube array positive electrode material of a lithium sulphur battery, which belongs to a preparation method of positive electrode materials of lithium sulphur batteries and solves the problems, such as poor electrical conductivity and low specific capacity, of an existing positive electrode material of a lithium sulphur battery. The preparation method comprises the following steps: (1) preparing a titanium dioxide nanotube array, (2) depositing a conductive reinforcing material, and (3) depositing elemental sulphur, wherein the steps (2) and (3) can be repeated to form a multiple depositional cycle period, so that a positive electrode material with a multilayer coaxial heterostructure is obtained, and has different sulphur loading capacities. According to the preparation method, the titanium dioxide nanotube array is taken as a substrate material, and the conductive reinforcing material and the elemental sulphur are compounded and deposited and enter titanium dioxide nanotubes to form the positive electrode material with the coaxial heterostructure, so that the conductivity of the positive electrode material is improved, the sulphur loading capacity of the positive electrode material is improved, the cycling performance and specific capacity of a lithium sulphur battery are further improved, and the preparation method has certain impelling action for speeding up the further large scale application process of the sulphated lithium battery.

A method includes the steps of disposing a substrate having a conductive thin film and a photo-semiconductor thin film in this order on an insulative base in an aqueous electrolyte material that solubility is lowered by a change of pH, irradiating with light a selected region of the photo-semiconductor thin film and precipitating the material to the selected region of the photo-semiconductor thin film to form a micro-lens array layer.

Object: To provide a coated article in which an electrodeposition coating film formed on an untreated steel sheet exhibits excellent corrosion resistance, in particular, excellent hot salt water immersion resistance at 55° C.; and a multilayer coating film formed by a 3-coat 1-bake coating method on the electrodeposition coating film, which is formed on the untreated steel sheet, exhibits excellent corrosion resistance in a combined corrosion cycle test.Means for Achieving the Object: The present invention provides a cationic electrodeposition coating composition including amino group-containing modified epoxy resin (A), blocked polyisocyanate curing agent (B), metal compound (C), and nitrogen oxide ion (E), wherein metal compound (C) is contained in an amount of 10 to 10,000 ppm calculated as metal, and nitrogen oxide ion (E) is contained in an amount of 50 to 10,000 ppm relative to the mass of the cationic electrodeposition coating composition.

Acrylic aqueous dispersions useful in coating compositions for coating food and beverage containers are disclosed. The aqueous dispersion is the reaction product of:(a) a hydrophobic vinyl addition polymer containing pendant or terminal ethylenically unsaturated groups,(b) a mixture of vinyl monomers including a vinyl monomer containing carboxylic acid groups;the reaction product containing active hydrogen groups and being at least partially neutralized with a base and dispersed in aqueous medium; the aqueous dispersion being substantially free of bisphenol A and derivatives thereof.