228 results about "Cu nanoparticles" patented technology

The invention discloses a super hydrophobic anti-icing coating and a preparation method thereof, and is realized by preparing a fluorine contained acrylic resin and combining the fluorine contained acrylic resin with organosilicon resin and nano particles. In a scheme of the invention, the fluorine contained acrylic resin has small surface energy and strong hydrophobicity. The organosilicon resin utilizes effect of -CH3 on a surface thereof and small polarity to substantially reduce contact angle hysteresis. The fluorine contained acrylic resin can crosslink and solidify with the nano particles and active groups in the organosilicon resin to form a composite network. The invention can overcome defects of complex technology, high costs and unsuitability for large scale usage of an ordinary method for preparing a super hydrophobic coating; and the prepared coating can realize super hydrophobic anti-icing effect through a regular spraying method.

This document provides materials and methods related to nanoparticles. For example, nanoparticle compositions, methods for making nanoparticle compositions, and methods for using nanoparticle compositions are provided. In some cases, the nanoparticles are gold (e.g., colloidal gold) nanoparticles. A nanoparticle can include one or more agents linked to its surface, such as therapeutic and / or diagnostic agents, and can be from about 1 nm to about 10 nm in size.

The invention discloses a preparation method of a stable superhydrophobic hot liquid coating, and belongs to the technical field of surface coating preparation. According to the preparation method, in an acetone-water mixed system, in the catalytic effect of acid or base, organic silane and nano particles carry out hydrolysis and condensation reactions to obtain organic silane polymer / nano particle compound suspension; then organic resin adhesive is added into the compound suspension, the mixture is evenly mixed and evenly sprayed on the surface of a substrate material, and finally a thermal curing treatment is performed to obtain the stable superhydrophobic hot liquid coating. The prepared coating has an excellent superhydrophobic hot liquid performance, has the advantages of good mechanical stability, chemical stability, and environmental stability, and thus has a good application prospect.

The invention discloses a nano reinforcing method for recycled aggregate concrete, which belongs to the technical fields of recycling comprehensive utilization of waste and production of building materials, and is mainly characterized by comprising the steps of: mixing and stirring a recycled aggregate and a nano particle dispersion for 5-10s; after the surface of the recycled aggregate is in a moist state, further mixing the recycled aggregate with all admixtures for 5-10s; and mixing and stirring with cement, water and a high-efficiency water reducing agent for 20-45s to obtain a nano-reinforced recycled aggregate concrete mixture. The nano reinforcing method has a principle that by changing a stirring process and introducing the nano dispersion, nano particles can be adsorbed into the opening pores and microcracks of the recycled aggregate, an admixture enriched layer is further formed on the surface of the recycled aggregate, the nano particles permeating into the interiors of the opening pores of the recycled aggregate and the admixture enriched layer formed on the surface of the recycled aggregate are used for jointly absorbing calcium hydroxide enriched on the surface and the pores of the recycled aggregate in the strength development process of the recycled aggregate concrete, a gelling material with higher strength is generated through hydration, liquid-phase or solid-phase reactions so as to reinforce the recycled aggregate per se and an interface between the recycled aggregate and set cement, and thus, the strength of the recycled aggregate concrete is enhanced. After the nano reinforcement, the recycled aggregate concrete has the 28-day compression strength improved by around 15-20%.

A plurality of semiconductor nanoparticles having an elementally passivated surface are provided. These nanoparticles are capable of being suspended in water without substantial agglomeration and substantial precipitation on container surfaces for at least 30 days. The method of making the semiconductor nanoparticles includes reacting at least a first reactant and a second reactant in a solution to form the semiconductor nanoparticles in the solution. A first reactant provides a passivating element which binds to dangling bonds on a surface of the nanoparticles to passivate the surface of the nanoparticles. The nanoparticle size can be tuned by etching the nanoparticles located in the solution to a desired size.

The invention relates to a supply system for a sub-cooling and nano particle jet flow minimal quantity lubrication coupled grinding medium. The supply system comprises at least one minimal quantity lubrication and sub-cooling jet nozzle combined unit which is arranged on the side of a grinding wheel guard of a grinding wheel and is matched with a workpiece on a workbench. Each minimal quantity lubrication and sub-cooling jet nozzle combined unit comprises a minimal quantity lubrication atomization minimal jet nozzle and a sub-cooling jet nozzle, wherein the minimal quantity lubrication atomization minimal jet nozzle is connected with a nano fluid pipeline and a compressed air pipeline, and the sub-cooling jet nozzle is connected with a sub-cooling fluid pipeline; the nano fluid pipe, the compressed air pipeline and the sub-cooling liquid pipeline of each unit are connected with a nano fluid supply system, a low-temperature medium supply system and a compressed air supply system through control valves; and the nano fluid supply system, the low-temperature medium supply system and the compressed air supply system are connected with a control device. By means of the supply system, grinding burn is effectively eliminated, the surface quality of workpieces is improved, and efficient low-consumption environment-friendly energy-saving low-carbon clean production is achieved.

A resist composition with enhanced X-ray and electron sensitivity includes a plurality of chemically inert nanoparticles dispersed throughout a base resist material. The nanoparticles have a higher atomic number than the base resist material and each of the nanoparticles is formed by a nanoparticle core, e.g., of a noble metal, coated with an organic capping layer or shell. The latter renders the core dispersible and chemically compatible with the resist material surrounding the nanoparticle. A method of making a resist composition with enhanced X-ray and electron sensitivity is to provide a resist material and disperse chemically inert nanoparticles throughout the resist. The nanoparticles have a higher atomic number than the resist and a have core / shell structure. A resist composition with enhanced X-ray and electron sensitivity can be made by having a nanoparticle core, with a higher atomic number than the resist, that is coated with an organic capping layer. The nanoparticle with the core / shell structure is then dispersed throughout the resist material.

The invention discloses a clean-type heavy-duty open gear grease with self-repairing function. The product is composed of a lubricating grease base grease prepared from an organic compound thickening mineral oil containing carbamido in molecules or synthetic oil, and additives. A base grease thickener is composed of an MDI and organic amine in a molar ratio of 1:1-3; and the base oil is mineral oil or poly alpha olefin synthetic oil. The heavy-duty open gear grease comprises the following components, calculated by the weight of the base grease: 50-60wt% of base grease, 4-8wt% of a extreme pressure antiwear agent, 1-4wt% of an oily agent, 6-8wt% of a solid additive, 0.5-1.5wt% of an antirust agent, 25-35wt% of a tackifier, 2-4wt% of a self-repairing additive, and 0.3-1.0wt% of an antioxidant. The invention adopts borate as the extreme pressure antiwear agent added with an extreme pressure agent containing a small amount of sulfur phosphorus, so as to improve the extreme pressure anti-wear performance of the lubricating grease, as well as realize low toxicity, tastelessness and environment-friendliness of the grease. Besides, soft metal Cu nanoparticles employed by the invention endow good self-repairing performance on the grease. Compared with a traditional open gear lubricant product, the heavy-duty open gear grease provided by the invention has characteristics of excellent lubrication performance, self repairing, tastelessness and environment-friendliness, and can be widely used for lubricating of open gears.

The invention discloses a making method of scraping-proof, stone-impacting resistant aqueous nanometer automobile paint in the chemical paint making technical domain, which comprises the following parts: 60-70% paint filming base, 5-15% nanometer powder, 20-25% solvent water and 0.5-1.0% adjuvant, wherein the adjuvant contains thickener, dispersant, defoamer and filming agent; the weight rate of crosslinking agent and nanometer emulsion is 0.9:1-1:1; the crosslinking agent is chemical material of melamine type; the scraping-proof index of paint layer can be 96-99% (displayed by glass keeping rate).

The present invention obtains nanometer particle array with one-dimensional diameter and number density gradient through gas phase aggregation process to generate nanometer particle, adiabatic expansion to obtain nanometer particle beam, collimating with collimator to a high vacuum deposit chamber to form highly oriented nanometer particle beam, rotating the substrate seat to form a nanometer particle beam incoming angle of 10 deg to the substrate while maintaining the substrate and the blocking mask inside the shoot area of the nanometer particle beam, and controlling the deposition of the nanometer particle beam on the substrate for 30 sec. The method has high efficiency, low cost, simple technological process and other features, and can deposit the gradient nanometer particle array in decades of seconds under common technological parameter condition.

The invention provides a graphene modified composite mesoporous carbon microsphere air purifying preparation. A certain amount of beta-cyclodextrin is added to thin-layered nano-SiO2 particles covering the surfaces of obtained micro-SiO2 particles, a certain quantity of obtained RGO / TiO2 nanoparticles is added simultaneously, -OH, -COOH, C-O-C and C=O oxygen-containing functional groups rich on the surface of graphene are adsorbed by and bonded with the RGO / TiO2 nanoparticles on the basis of the molecular recognition characteristic of beta-cyclodextrin, then a certain amount of CTAB (cetyltrimethylammonium bromide) surfactant is added, CTAB serving as a micelle stabilizer can stop the RGO / TiO2 nanoparticles from further hydrolysis and growth, and finally, the novel air purifying preparation adopting RGO / TiO2 supported by carbon microspheres with a mesoporous shell structure is obtained. With adoption of the scheme, the purity is high, RGO / TiO2 supported by the carbon microspheres with the mesoporous shell structure in powder is better in bonding performance, uniform in distribution and controllable in dimension at mesopores, and the air purifying preparation can be used for purifying polluted air and removing dust in a haze environment as well as photo-catalytically degrading and separating nitric oxide, sulfide or other organic pollutants in the polluted air.

The invention discloses a plasticized polylactic acid / inorganic nano composite material and a preparation method thereof. The method comprises: firstly, mixing a plasticizer and nano particles in equipment such as a high shear emulsifying machine to prepare nano sol; and secondly, filling the nano sol into a double-screw extruder by a metering pump to blend the nano sol with the polylactic acid to obtain the plasticized polylactic acid / inorganic nano composite material. The material can be used to make products by die pressing, extruding, plastic injection and other processes. The products are used in fields of medical care, home appliances, package and the like. Compared with common polylactic acid materials which are widely used at present, the material has higher ductility and higher processing flowability.

A hyperthermia device comprising a generator of radio-frequency electromagnetic fields, an amplifier of this signal, a transmitter of the electromagnetic field generated, and a direct temperature measurement system is disclosed for use with one or more nanoparticles capable of dissipating the energy of the applied electromagnetic field in the form of heat and it being possible to directly control the temperature of said nanoparticles.

The invention discloses a method for preparing plasticized and toughened wood flour / polypropylene composite. The method comprises the following specific steps: mixing a plasticizer with nanoparticles by using a high-shear emulsifier, an emulsifying pump or an over-speed mixer to prepare a nano-sol, injecting the nano-sol into a twin-screw extruder by using a metering pump, and carrying out melt blending on the nano-sol with polypropylene and wood flour to prepare the plasticized and toughened wood flour / polypropylene composite. The plasticized and toughened wood flour / polypropylene composite product plasticized and toughened wood flour / polypropylene composite product is prepared after carrying out subsequent processes including mold pressing, calendaring, extruding, injecting and molding to the plasticized and toughened wood flour / polypropylene composite. Compared with the common wood-plastic composite used widely at present, the plasticized and toughened wood flour / polypropylene composite has better processing flowability and impact toughness.

A process for preparing the core-shell Cu-Sn nanoparticles includes preparing Cu nanoparticles, dispersing in water, mixing with the solution of stannous chloride under existence of high-molecular protecting agent and thiourea, and displacement reaction to generate a Sn layer on the surface of Cu nanoparticle. It can be used as the additive of extreme-pressure lubricant, powder metallurgy, and different special materials.

A process for preparing water-soluble nano particles includes directly mixing the hydrophilic macromoleculae (protein, antibody, antigen, starch, etc) with the fluorescent or magnetic nano particles in non-polar or weak-polar solvent, mechanical grinding, volatilizing organic reagent, dissolving in water or buffering solution, and centrifugal separating twice. Its advantage is high speed.

The invention discloses an artificial fiber and preparing method of releasable far-infrared ray, which comprises the following steps: preparing artificial fiber raw material and nanometer particle of releasable far-infrared ray ranged from 4-14 um; blending artificial fiber raw material and nanometer particle; dispersing artificial fiber evenly; preventing yarn spraying hole or outlet from blocking the weaving loom; making water molecular more active in the cell; accelerating blood circulation and metabolism.

The invention relates to a CuO / TiO2 nanotube array and a preparation method and an application method thereof. The preparation method comprises the following steps of: depositing elementary Cu nanoparticles on a TiO2 nanotube array in a standard three-electrode system by using aqueous solution containing 0.005 to 2mol / L CuSO4.5H2O as plating solution; putting the CuO / TiO2 nanotube array into mixed solution of 0.25 to 0.5mol / L NaOH, 5 to 15mmol / L K2S2O8 and 10 to 25mmol / L sodium lauryl sulfate, and oxidizing; and calcining the modified TiO2 nanotube array under the aerobic condition. The CuO / TiO2 nanomaterial with a novel structure has high specific surface area, a high electron transport rate, and a wide application prospect in the aspects of solar cells, photocatalysts, sensors and the like.

The invention relates to a nano composite ice-covering-proof coating containing phase change silicone oil and a preparation method thereof. The ice-covering-proof coating comprises, by mass, 1-50% of phase change silicone oil, 1-50% of nano particles with the particle sizes of 30-80nm, 7-85% of hydrophobic resin, 0-30% of curing agents and 10%-90% of solvent. The preparation method of the ice-covering-proof coating comprises preparing the phase change silicone oil, preparing the hydrophobic resin, and evenly mixing the phase change silicone oil, the nano particles, the hydrophobic resin, the curing agents and the solvent to obtain the coating. The nano composite ice-covering-proof coating and the preparation method have the advantages that preparation raw materials of the coating are easy to obtain, and the preparation process is simple, and the preparation method is easy to operate; and when a coating made by spraying the coating on a metal matrix is at normal temperature and low temperature, the contact angle of water is 155 degrees, the rolling angle is 3 degrees, and the good ice-covering-proof effect is achieved.

Active agent-loaded nanoparticles that are based on a hydrophilic protein or a combination of hydrophilic proteins, and methods for producing the nanoparticles and the use thereof. Functional proteins or peptide fragments are bound to the nanoparticles via polyethylene glycol-α-maleimide-ω-NHS esters.

Th invention discloses a nano particle intercalation graphene oxide thin film and a preparation method and application. The thin film is formed by spraying graphene oxide onto a millipore filter in anelectrostatic spraying mode to be stacked, nano particles are inserted between graphene oxide sheets, the particle size of the nano particles ranges from 10 nm to 40 nm, and the nano particles are hydrophilic nano particles. The preparation method comprises the steps that graphene oxide and the namo particles are added into a solvent to be dispersed uniformly, a mixed solution is obtained, and the nano particle intercalation graphene oxide thin film can be obtained by spraying the mixed solution to the millipore filter in the electrostatic spraying mode. The nano particle intercalation graphene oxide thin film can effectively increase the space between the graphene oxide sheets, the pure water flux is increased, and meanwhile the high retention rate is kept for organic dyestuff.

The invention relates to a method for remediating pollution of nitrate nitrogen in underground water, which mainly comprises the following steps: firstly, preparing Fe / Cu nanoparticles by liquid phase reduction step by step: under the protection of argon gas, reducing a FeSO4.7H2O solution with a KHB4 solution to prepare FeO nanoparticles, then introducing a CuSO4.5H2O solution into the FeO nanoparticles for continuously stirring for reacting, after reacting, washing the nano Fe / Cu solution with deoxidized and deionized water, and then, selecting the Fe / Cu nanoparticles by a magnetic method; secondly, introducing the deoxidized reaction solution into the prepared Fe / Cu nanoparticles for physically mixing simply; and finally, adding underground water containing nitrate nitrogen and sealing to carry out oscillating reaction. The method has high efficiency for remediating pollution of nitrate nitrogen in underground water, has simple required equipment and convenient operation, and provides a new way for remediating pollution of nitrate nitrogen in underground water with high efficiency and low cost.

The invention relates to a catalyst for propane dehydrogenation to prepare propylene. The catalyst is characterized in that a Ni-containing SSZ-13 molecular sieve is taken as the carrier, and Co3O4 is taken as the active component. The invention also relates to a preparation method of the catalyst. According to the preparation method, Ni is in-situ introduced into the carrier namely SSZ-13 molecular sieve, Ni can largely improve the propylene selectivity and stability of catalyst during the propane dehydrogenation process; moreover, the large specific surface of the SSZ-13 molecular sieve can improve the dispersion uniformity of active components; caprolactam-tetrabutyl ammonium fluoride is taken as the template, in one aspect, caprolactam-tetrabutyl ammonium fluoride can be used as a surfactant and is capable of forming a strong interaction force with nano particles; in the other aspect, caprolactam-tetrabutyl ammonium fluoride can form a stable complex with Ni, and is capable of being used as a template to induce nano particles to form a catalyst with regular morphology and a uniform structure, and thus the dispersion uniformity and reaction stability of active component in catalyst are both improved.

The invention discloses a preparation method of graphene / nanometer particle composite materials based on infrared ray radiation. The preparation method comprises the following steps that 1) graphite oxide solution is mixed with nanometer particle water suspension to obtain mixing liquid, the materials are cast and dried until the weight percentage of total solvents is lower than or equal to 50 percent, and composite products are obtained; and 2) solvents in the composite products are removed under the radiation of an infrared ray heating lamp, in addition, the reduction reaction of the graphite oxide is carried out, and the graphene / nanometer particle composite materials are obtained. According to the preparation method, the graphene / nanometer particle composite materials are prepared under the radiation of the infrared ray heating lamp, the process is very simple and convenient, the production cost is very low, the industrial large-scale production is favorably realized, different kinds of nanometer particles can be selected, different graphene / nanometer particle composite materials can be prepared, different production and use requirements can be met, and wide application prospects are realized in the fields of electrode materials, conducting fillings and the like.

The invention relates to a pyrolysis method synthesis strong combination-based copper coated graphene reinforced high-strength Sn-Ag-Cu-RE series composite brazing filler metal and a preparation method. The additive amount of copper coated graphene is 0.01-0.11% in mass fraction. Through coating copper on graphene, the problems that the graphene spontaneously reunite and lead-free brazing filler metal matrixes are bad in moisture are solved; and by adoption of a pyrolysis method, the copper coated graphene is synthesized, Cu nanoparticles are uniformly distributed on the surface of graphene, so that strong combination is formed to prepare copper coated graphene reinforced high-strength Sn-Ag-Cu-RE series composite brazing filler metal, thereby enhancing the performance of the composite brazing filler metal.

The invention discloses a nano-liquid electrostatic atomization and thermoelectric heat pipe integrated trace lubrication grinding device which comprises a grinding wheel with heat pipes and an electrostatic atomization combined spray nozzle in thermoelectric refrigeration and magnetic enhancement electric fields. Thermoelectric film materials cover the surfaces of two sides of the grinding wheel with the heat pipes, and extra electric fields are applied to the outsides of the thermoelectric film materials; a high-voltage direct-current electrostatic generator and a magnetic field forming device are arranged on the outside of the electrostatic atomization combined spray nozzle; the electrostatic atomization combined spray nozzle is connected with a nano-particle liquid supply system and a gas supply system; nano-liquid is subjected to electrostatic atomization and is sprayed to grinding zones by the electrostatic atomization combined spray nozzle, and heat in the grinding zones can be absorbed; the heat can be absorbed by the thermoelectric film materials in the grinding zones under thermoelectric effects, and absorbed heat can be dissipated by the grinding wheel with the heat pipes after the thermoelectric film materials are separated from the grinding zones, so that a Carnot cycle can be formed. The nano-liquid electrostatic atomization and thermoelectric heat pipe integrated trace lubrication grinding device has the advantages that nano-liquid electrostatic atomization and thermoelectric refrigeration and heat pipe refrigeration technologies are integrated with one another, accordingly, a large quantity of grinding heat can be absorbed after the nano-liquid electrostatic atomization and thermoelectric heat pipe integrated trace lubrication grinding device reaches the grinding zones, the grinding temperatures can be reduced, and obvious refrigeration effects can be realized for the grinding zones.

The invention provides a nanoparticle surface modified active semi-coke compound desulfurization denitrification agent, which is compounded by active semi-coke and nanoparticle. The invention improves desulfurization efficiency by the high specific surface area, the catalysis characteristic and the oxidizzation characteristic of nano materials, and can catalytically oxidize nitric oxide in smoke, thereby achieving the aim of denitrification.

The invention discloses an ethanol gas sensor based on an In2O3 microflower / SnO2 nanoparticle composite material and a preparation method of the sensor, belonging to the technical field of gas sensors. The ethanol gas sensor consists of a nickel-cadmium alloy heating coil, an alumina ceramic tube, a platinum wire, a gold electrode and an In2O3 microflower / SnO2 nanoparticle composite material. By utilizing the catalytic activity of SnO2 on In2O3, the oxidative activity of the material is improved, so that the sensitivity of the sensor is greatly improved, materials with morphology are directly mixed at the first time, the large specific surface area of the material is utilized, and the catalytic characteristics between oxides are utilized. According to the material, ethanol gas molecules are transported on the surface and have the characteristics of rapid adsorption and desorption, so that the response and recovery speed of the sensor is increased. Compared with an ethanol sensor manufactured by In2O3 microflowers which are not compounded with SnO2 nanoparticles, the ethanol sensor disclosed by the invention has the advantages that the sensitivity is greatly improved, and the sensitivity of the ethanol sensor disclosed by the invention is about 9.5 times that of the sensitivity of the ethanol sensor manufactured by In2O3 microflowers.

The invention discloses a nuclear magnetic resonance sensor for detecting melamine based on magnetic nanoparticles. The nuclear magnetic resonance sensor is a Fe / Fe3O4 magnetic nanoparticle containing an acceptor unit which is capable of specific recognition of melamine and having water-solubility, superparamagnetism, uniform particle size distribution and a particle size of about 10 to 20 nm. A preparation method for the sensor comprises the following steps: preparation of a Fe / Fe3O4 magnetic nanoparticle through high temperature pyrolysis; preparation of Dopa-PEG and Dopa-acceptor unit by using N-hydroxy succinimide and 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride; and preparation of a target nanoparticle for preparation of the nuclear magnetic resonance sensor used for detecting melamine in virtue of coordination of oxygen and connection of the nanoparticle. The preparation method provided by the invention has the advantages of easiness, safety, economy and easy availability of raw materials and good process controllability. According to the invention, a novel prospect--a nanometer magnetic resonance sensor is provided for application of a nanometer magnetic resonance contrast agent material, and the research area of nano-materials is broadened.

The invention discloses a multifunctional nano-composite having up-conversion luminescence, oxygen sensing and biological connectivity and a preparation method thereof, in particular relates to a multifunctional nano-composite with a core-shell structure formed by connecting a [Ru(phen)2phen-Si]Cl2 complex with NaYF4:Yb<3+> and Tm<3+> nano-particles by using a SiO2 shell and preparation thereof. The nano-composite and the method solve the problems of the single structure of composites and a complex preparation process in the conventional fields of biomedicine and biochemistry. The composite comprises the [Ru(phen)2phen-Si]Cl2 complex, SiO2, and the NaYF4:Yb<3+> and Tm<3+> nano-particles in a mass ratio of 40-100:1.1-3.3:13.4-53.4. Due to the functions of the multifunctional composite, the application of the multifunctional composite in the fields of the biomedicine, such as biomarkers, oxygen concentration measurement in organisms and the like, is enhanced.