34 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.

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 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 present invention relates to an amphiphilic hydroxyl magnetic bead, and a preparation method and application thereof. The preparation method comprises the following steps: mixing 0.5 g-5 g of Fe3O4 bare magnetic beads, 1 ml-20 ml of the hydrophilic silane modifier, 0 ml to 10 ml of the hydrophobic silane modifier, 5 ml-20 ml of the catalyst, and 200 ml to 2500 ml of the solvent for a reactionat 25 DEG C to 80 DEG C; and after the completion of the reaction, collecting the black precipitated material for washing and drying to obtain an amphiphilic hydroxyl magnetic bead. According to the technical scheme of the present invention, surface characteristics of the magnetic bead can be controlled by adjusting the type and the quantity of the hydrophobic silane modifier, and the amphiphilichydroxyl magnetic bead has excellent hydrophilicity and surface reactivity, good biocompatibility, can be used to isolate the nucleic acid or coupled with biologically active substances such as proteins and antibodies to realize the identification of biologically active substances, and has high application value.

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 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 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 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 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.