35 results about "Surface reactivity" patented technology

An ALD method includes exposing a substrate to a first precursor including a plurality of different ligands, chemisorbing a precursor monolayer on the substrate, and reacting a second precursor with the precursor monolayer to yield a product monolayer. A surface reactive ligand exhibits a chemisorption affinity that exceeds the chemisorption affinity exhibited by a gas reactive ligand. Another deposition method includes exposing a substrate to a precursor containing an amino and / or imino ligand and a halide ligand and depositing a layer. The precursor exhibits a volatility that exceeds the volatility with a halide ligand taking the place of each amino and / or imino ligand. The precursor exhibits a thermal stability that exceeds the thermal stability with an amino and / or imino ligand taking the place of each halide ligand. The layer may exhibit less halogen content than with a halide ligand taking the place of each amino and / or imino ligand.

Reactive silica particles capable of producing coatings exhibiting excellent scratch resistance, weather resistance, adhesiveness, and curability, while satisfying a wide spectrum of performances from transparency to semi-transparency and providing a glossy surface as well as a frosty surface. Reactive silica particles comprises silica particles and an organic compound chemically bonded to the silica particles via a silyloxy group, wherein the organic compound has a polymerizable unsaturated group, a group represented by the following formula (1), (wherein X is a group selected from -NH-, -O-, and -S- and Y is a group selected from oxygen and sulfur, provided that when X is -O-, Y is a sulfur atom), and a group represented by the following formula (2), (wherein Z is a group selected from oxygen and sulfur)

Poly(ester-acrylate) and poly(ester / epoxide) dendrimers. These materials can be synthesized by utilizing the so-called “sterically induced stoichiometric” principles. The preparation of the dendrimers is carried out by reacting precursor amino / polyamino-functional core materials with various branch cell reagents. The branch cell reagents are dimensionally large, relative to the amino / polyamino-initiator core and when reacted, produce generation=1 dendrimers directly in one step. There is also a method by which the dendrimers can be stabilized and that method is the reaction of the dendrimers with surface reactive molecules to pacify the reactive groups on the dendrimers.

A photocurable composition, including (a) a photocurable monomer, e.g. a cationically curable monomer and / or a radically curable monomer; (b) reactive particles comprising a crosslinked elastomeric core, e.g. made of polysiloxane material, and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; and (c) an appropriate photoinitiator, e.g. a radical photoinitiator; and a cationic photoinitiator. A method of making a 3-D object from such a composition and a 3-D object made by the method are also provided. The cured composition generally has a smooth surface. The use of the reactive particles makes the composition more stable and the particles do not readily separate out.

A mass spectrometer (MS) that is adapted to allow rapid gas-phase hydrogen / deuterium exchange (HDX) labeling of ions in one or more traveling wave ion guides (TWIGs) with or without ion mobility separation. The addition of isotopic labeling by gas-phase HDX offers a sensitive alternative dimension for conformational detection, which enables high resolution detection of gaseous conformations based on shape and surface reactivity. Gas-phase, isotopic HDX labeling or “curtain” labeling, can be performed by infusing a reactive, isotopic labeling gas, e.g., ND3, into one or more of the traveling-ion wave guides (TWIG) in the MS. Analyte ions retained in the potential wells of a traveling wave generated by one or more of the TWIGs can be isotopic labeled at adjustable gas pressures. Labeling times can also be controlled by adjusting the speed of the traveling wave and can be performed within milliseconds of ionizations, probing protein conformations present in solution.

Disclosed herein is a method of: treating an organic polymer with an electron beam-generated plasma; exposing the treated polymer to air or an oxygen- and hydrogen-containing gas, generating hydroxyl groups on the surface of the polymer; reacting the surface with an organosilane compound having a chloro, fluoro, or alkoxy group and a functional or reactive group that is less reactive with the surface than the chloro, fluoro, or alkoxy group; and covalently immobilizing a biomolecule to the functional or reactive group or a reaction product thereof.

The invention discloses a preparation method of core-shell polyphenol surface finish collagen polypeptide nanospheres. The preparation method comprises the following steps: taking and dispersing collagen polypeptide nanospheres in distilled water, regulating the pH of a system to be 4-7 while stirring, then adding a polyphenol substance, stirring for reaction, centrifuging and separating to obtain solid microspheres; taking and dispersing the solid microspheres in distilled water, stirring, and adding a penetrant and a cross-linking agent, stirring for reaction, adding a fixing agent, adjusting the pH to 5-8, standing, centrifuging, and separating to obtain a solid, and drying the solid in vacuum to obtain the core-shell polyphenol surface finish collagen polypeptide nanospheres. According to a tanning chemical principle, the surfaces of the collagen polypeptide nanospheres are coated with the layer of the polyphenol substance to enhance the content of active functional groups, and particularly the adsorption processing capacity of a polyhydroxy structure having higher complexing power for heavy metal ions is enhanced, and a production process is simple, high in operability and easy to generalize, and an obtained product has higher promotional value and has a well application prospect.

The invention relates to an adsorption filter material (1) that provides protection against chemical toxins, chemical weapons and pollutants, with a preferably multi-layer composite construction (2). The layer construction (2) includes at least one planar support layer (3) with two opposing sides (3′, 3″) and an adsorption layer (4), provided on the support layer (3) made from a material which adsorbs chemical toxins, the surface of at least one of the both sides (3′ and / or 3″) of the support layer (3) being modified by plasma treatment. The surface properties, in particular the surface finish and the surface reactivity can be adjusted and optimised to match the application by means of the plasma treatment.

The invention discloses environment-friendly anti-radiation interior wall latex paint. With an organosilicon modified acrylate emulsion as a main material, the paint has good flexibility, high-low temperature resistance, water resistance and weather fastness and low surface energy; under the mutual synergistic effect of modified hollow glass beads, jade powder and a polygonatum odoratum and grape leaf mixed extraction solution, the radioresistance, the reflective thermal insulation and the ultraviolet absorption ability are improved; a non-ionic emulsifier is intercalated in an ionic emulsifier, so that the distance between ion bonds of a reactive emulsifier on the surfaces of latex particles is increased, electrostatic tension of latex particle surfaces is reduced through electrostatic shielding of the non-ionic emulsifier, distribution of the reactive emulsifier on latex particles is increased, and accordingly, the latex paint has higher stability and good surface tension; by means of shell powder, the latex paint has fine texture and a full paint film, precipitation and good brushing property are avoided, and porosity is favorable for adsorbing harmful substances such as formaldehyde, metal ions and the like in air; with the deionized water as a solvent, the latex paint is safe, environment-friendly, high in solid content, low in content of VOC, high in adhesion force and excellent in water resistance, and the thickness of the paint film can be increased.

The invention belongs to the field of preparation of ultrafine powder materials, and particularly relates to a light calcium carbonate ultrafine powder material and application thereof in a polyaniline conductive film. The powder material is prepared by the following steps: taking stearic acid, heating and melting, mixing the stearic acid with light calcium carbonate, adding the mixture in deionized water with the weight of 60 to 70 times of the weight of the mixture, ultrasonically treating for 5 to 10 minutes, mixing with a composite silane solution, feeding into a reaction kettle, thermallyinsulating, stirring, discharging, cooling, centrifuging, separating, drying a precipitate, and grinding to obtain the light calcium carbonate ultrafine powder material. The stearic acid is firstly used to treat the light calcium carbonate, the surface reactivity of the light calcium carbonate is improved by the surface adsorption effect of the stearic acid, then the light calcium carbonate is blended with ethanol and dodecyl mercaptan dispersed the treated by a silane coupling agent, through high temperature esterification, the dispersion compatibility of the calcium carbonate among organicpolymers can be improved, and improvement of the mechanical stability of a finished film can be well promoted.

The present invention relates to a porous biomaterials surface activation method by coating with a layer of apatitic nanocrystals in order to increase their surface reactivity. The method according to the invention is characterized by the following steps: a) preparing a nanocrystalline apatitic calcium phosphate analogous to bone mineral by mixing a calcium salt solution with a phosphate salt solution in a Ca / P ratio ranging between 1.3 and 2 at a temperature ranging between 0 and 60 ° C., b) slurrying the mixture obtained in step a) in an aqueous solution so as to obtain a fluid, homogeneous paste containing 80 to 98% of water, c) bringing a porous biomaterial into contact with the suspension obtained in step b), d) drying the porous biomaterial at a temperature below 100 ° C.

The invention discloses a cross-linked polyethyleneimine-modified calcium carbonate powder for waterborne paint. A preparation method for the modified calcium carbonate powder comprises the following steps: subjecting calcium carbonate to pretreatment via titanate coupling agent / ethanol solution wet-process ball milling so as to improve the dispersibility and surface reactivity of calcium carbonate; and allowing a polyethyleneimine film to grow on the surface of calcium carbonate in situ. The eventually prepared modified calcium carbonate powder has stable amphipathy, shows affinity to resin molecules in the system of the waterborne paint, can be dispersed in and coexist with solvents in the system of the waterborne paint, and is not prone to settlement, so excellent filling effect is obtained.

Methods are presented for reducing reactivity of ferroalloys used in the manufacture of stick welding electrodes with ferroalloy coatings, in which surface metal silicon of ferroalloy powder is stabilized by dissolving or prereacting the surface silicon or silicon dioxide to provide stabilized ferroalloy powder with decreased surface reactivity to caustic silicate solutions that can be mixed with silicate solution to form a slurry for coating precut welding rods.

The invention relates to the field of flow batteries, and discloses a carbon fiber and a preparation method thereof, and application of a carbon fiber, an electrode and a vanadium redox flow battery.The numerical value of the crystal layer spacing d002 of the carbon fiber is less than 0.3417 nm, the value of the fiber radial graphite crystallite dimension Lc of the carbon fiber is more than 35.6nm, and the value of the fiber axial graphite crystallite dimension La of the carbon fiber is more than 43 nm. The carbon fiber provided by the invention has the advantages of low resistivity and highsurface activity, and is low in production cost; the carbon fiber provided by the invention is particularly suitable for an electrode material of a flow battery; and when the carbon fiber provided bythe invention is used as the electrode material of the flow battery, the surface reactivity of the electrode of the flow battery can be effectively improved, and the internal resistance of the electrode of the flow battery is reduced.

The invention discloses polymethyl methacrylate-nano cerium oxide coating modification calcium carbonate powder. The preparing method includes the steps that titanate coupling agent / ethanol solution wet method ball grinding pretreatment is carried out on calcium carbonate to improve dispersity and surface reactivity, calcium carbonate powder obtained after pre-modification is mixed with nano cerium oxide and methyl methacrylate monomers to react, a polymethyl methacrylate / nano cerium oxide composite membrane layer is generated on the surface through in-situ polymerization, modified calcium carbonate powder has good compatibility with a resin matrix, unique characteristics are endowed to the powder by rare earth oxide, tenacity, thermal ageing resistance, light ageing resistance and electromagnetic radiation resistance of plastic can be improved, and added value is effectively increased.

The invention relates to a preparation method of environment-friendly strain-resistant external wall latex paint. The preparation method is simple in process, low in production cost, safe, environmentally friendly and suitable for industrial production; by taking an organic silicone modified acrylate emulsion as the main raw material, the latex paint has good high-low temperature resistance, low surface energy and excellent water tolerance and weather resistance; an ionic emulsifier is embedded into a non-ionic emulsifier so as to increase the distance of reactive emulsifier ionic bonds on the surfaces of latex particles, and the non-ionic emulsifier has an electrostatic shielding effect, so that the electrostatic tension on the surfaces of the latex particles is decreased, the distance of reactive emulsifier ionic bonds on the surfaces of the latex particles is increased, and the latex paint has relatively high stability and good surface tension; the problem that shells widely spread to pollute the environment is solved, the latex paint has a fine texture, a pain film is replenished, and the latex paint is unlikely to precipitate, has excellent brushing property and is capable of adsorbing harmful substances such as formaldehyde and metal ions in air due to the porosity; and by taking deionized water as a solvent, the latex paint is safe, environmentally friendly, high in volume solid content, low in VOC, strong in adhesive force and excellent in water tolerance, and the thickness of the paint film can be increased.

The invention relates to environmental stain-resistant emulsion paint for exterior walls. With an organosilicon modified acrylate emulsion as a main raw material, the emulsion paint has flexibility, good high and low temperature resistance, low surface energy and excellent water resistance and weatherability. By embedding a non-ionic emulsifier into an ionic emulsifier, the distance between ionic bonds of a reactive emulsifier on the surface of emulsion particles can be widened. With electrostatic screening effect of the non-ionic emulsifier, electrostatic tension of the emulsion particle surface is increased, distribution of the reactive emulsifier on the emulsion particles is increased, and then the emulsion paint has higher stability and good surface tension. By the use of shell powder, the problem that overflowing shells pollute the marine environment can be solved, the emulsion paint can be endowed with fine texture, the paint film is enriched, the emulsion paint is not easy to precipitate and has good brushing property, and porousness is also beneficial to adsorption of harmful substances such as formaldehyde, metal ions, etc. in the air. By using deionized water as a solvent, the emulsion paint is safe and environmentally friendly, solid content in volume is high, thickness of the paint film can be increased, VOC is low, adhesion is strong, and water resistance is excellent.

The invention relates to a preparation method of environment-friendly anti-radiation internal wall latex paint. The preparation method is simple in process, low in production cost, safe, environmentally friendly and suitable for industrial production; by taking an organic silicone modified acrylate emulsion as the main raw material, the latex paint has good high-low temperature resistance, water tolerance and weather resistance and low surface energy; by virtue of a synergistic effect of modified hollow glass beads, jade powder and a radix polygonati officinalis-grape leaf mixed extracting solution, the latex paint has good radiation resistance, reflective heat insulation property and ultraviolet absorption capacity; an ionic emulsifier is embedded into a non-ionic emulsifier so as to increase the distance of reactive emulsifier ionic bonds on the surfaces of latex particles, and the electrostatic tension of the surfaces of the latex particles is decreased by virtue of the non-ionic emulsifier, so that the distribution range is enlarged, and the latex paint has relatively high stability and good surface tension; by utilizing shell powder, the latex paint has a fine texture, a pain film is replenished, and the latex paint is unlikely to precipitate, has excellent brushing property and is capable of adsorbing substances such as formaldehyde and metal ions due to the porosity; and by taking deionized water as a solvent, the latex paint is safe, environmentally friendly, high in volume solid content, low in VOC, strong in adhesive force and excellent in water tolerance, and the thickness of the paint film can be increased.

The invention relates to a method for preparing a cement water reducer from lignin. The method can effectively improve hydrophilicity of lignin, so that solubility of lignin is improved, surface reaction performance of lignin can be better improved, and the cement water reducer is prepared. The method includes the steps that lignin and a nitric acid solution are mixed, so that lignin is subjected to oxidation reaction for 0.5-2.5 h at 60-100 DEG C; after oxidation reaction, the reaction mixture is cooled to room temperature with cold water, and then the pH value of the cooled reaction solution is adjusted to be neutral with a 4M sodium hydroxide solution; dialysis and purification are conducted by means of a dialysis bag, the product is dried, and the cement water reducer is obtained. The method is simple, raw materials are rich, cost is low, lignin in slurrying waste liquid can be fully and effectively used, pollution is reduced, and discharge of pollutants is reduced.

The invention relates to a process for the production of relief printing plates, where a carrier with a polymeric substrate layer is provided and a relief is formed layer-by-layer on a surface of the substrate layer, where the relief is formed by means ofa) single or multiple application of a liquid comprising at least one reactive monomer to the surface of the substrate layer,b) diffusion of the reactive monomer into the polymeric substrate layer for a prescribed exposure time andc) hardening of the relief,where in step a) the liquid is applied in accordance with an image to the surface and where, after the prescribed exposure time of step b), any liquid that remains on the surface, having not diffused into the material, is removed from the surface, and in step c) the relief that is hardened comprises the polymer of the substrate layer and reactive monomer that has diffused into the material.

The present invention provides a method of preparing the surface of a sample well. In some aspects, methods of preparing a sample well surface involve contacting the sample well with a block copolymer to form a stain-resistant coating over the metal oxide surface of the sample well. In some aspects, methods of passivating and / or selectively functionalizing a surface of a sample well are provided.