45results about How to "With quantum size effect" patented technology

The invention discloses a backlight module of a display device and a white light LED. The backlight module comprises a lamp bar and a light guide plate, wherein the lamp bar is provided with a plurality of ultraviolet light LEDs, and the light-entering face of the light guide plate and the ultraviolet light LEDs are arranged oppositely. A path of the process from light emitted by the ultraviolet light LEDs to the light shot from the light-exiting face of the light guide plate at least comprises an RGB quantum dot fluorescent powder layer. The RGB quantum dot fluorescent powder layer comprises a red light quantum dot fluorescent screen, a green light quantum dot fluorescent screen and a blue light quantum dot fluorescent screen, wherein the red light quantum dot fluorescent screen, the green light quantum dot fluorescent screen and the blue light quantum dot fluorescent screen are sequentially arranged. The RGB quantum dot fluorescent powder layer generates high-purity white light under excitation of ultraviolet light emitted by the ultraviolet light LEDs. As the RGB quantum dot fluorescent powder layer is formed by sequentially arranging the red light quantum dot fluorescent screen, the green light quantum dot fluorescent screen and the blue light quantum dot fluorescent screen, color saturation of the backlight module is improved, and the problem of reabsorption of RGB quantum dot fluorescent powder is solved.

The invention provides a method for preparing a magnetic hydrophobic modified cationic polyacrylamide oil-removing flocculating agent and belongs to the technical field of environmental-friendly water treatment. The method comprises the following steps: dissolving dodecyl glucoside (or cocoanut fatty acid diethanolamide), dimethyl diallyl ammonium chloride, acrylamide and a photoinitiator in water, regulating the pH value, introducing nitrogen and sealing the reactor, performing photopolymerization under a low-voltage ultraviolet lamp so as to produce lacteous colloid; and dissolving the colloid in ultrapure water, adding magnetic nanometer iron oxide particles and ammonium persulfate to stir, washing, drying, grinding, and finally obtaining the black powdered oil-removing flocculating agent. According to the method disclosed by the invention, the polymerization time is short, the reaction temperature is low, condensation cooling is not needed, and energy conservation and consumption reduction are realized; due to the introduction of a hydrophobic monomer, the hydrophilic property of the flocculating agent is reduced, the adsorptive property of oil substances is enhanced, and the demulsification ability of the flocculating agent is enhanced; and due to the introduced magnetic nanometer iron oxide particles, under the action of an additional magnetic field, the flocculating agent is high in settling speed and easy to separate.

The invention discloses a flame-retardant and wear-proof corrugated case. The flame-retardant and wear-proof corrugated case comprises a case body composed of a corrugated paperboard. The paperboard sequentially comprises surface paper, corrugated paper and inner paper from outside to inside, and the surface paper, the corrugated paper and the inner paper are boned through oxidized starch, a vapor phase inhibitor is added into the oxidized starch, the surfaces of the surface paper and the inner paper are coated with a flame-retardant and wear-proof coating, and the coating is prepared from, by weight, 30-40 parts of phenolic resin, 10-15 parts of nanometer Sb2O3-Al(OH)3, 10-20 parts of nanometer wear-proof powder, 1-3 parts of a reactive diluent, 0.5-2 parts of an antifoaming agent, 2-5 parts of a penetrating agent, 0.5-1 part of an antioxidant, 10-20 parts of an organic solvent and 10-20 parts of a curing agent. According to the flame-retardant and wear-proof corrugated case, as cashew-nut-shell-oil-or-tripolycyanamide-modified phenolic resin is applied to the surface of the paper case, the quite-high wear-proof performance and the quite-high mechanical performance are achieved; meanwhile, the wear-proof nanometer powder is added into the coating, the wear-proof capacity of the surface of the paper case is enhanced, and a nanometer aluminum hydroxide is used as a flame retardant to achieve the aim of reducing the using amount and improving the flame-retardant performance.

The invention discloses a high-temperature-resistant corrosion-resistant coating for an engineering machinery tail gas pipe. The coating comprises the following components in percentage by weight: 55 to 65 percent of organic silicon epoxy resin polymer, 1 to 2 percent of salt mist resistant aid, 6 to 10 percent of copper ferrochrome black, 2 to 5 percent of nano zinc oxide, 6 to 3 percent of flaky mica powder, 7 to 4 percent of aluminium trippolyhosphate, 0.1 to 0.4 percent of leveling agent, 0.2 to 0.6 percent of defoaming agent, 0.2 to 0.6 percent of dispersing agent, 4 to 6 percent of talcpowder and 18.5 to 3.4 percent of dimethylbenzene. The bond strength of the coating to a substrate is obviously improved; high temperature resistance can reach 500 DEG C; the coating can resist salt mist corrosion for 48 to 72 hours; and the coating is still black and is slightly faded after being roasted at the temperature of 500 DEG C for 100 hours. The coating is convenient to construct and operate, has wide material sources, and can be applied to resisting corrosion on the outer surfaces of various kinds of steel structure high-temperature equipment, engineering machinery tail gas pipes and steel structure high-temperature chimneys.

A method for preparing a CuO nano-film includes steps: dripping NaOH aqueous liquor into Cu(NO3)2 liquor and obtaining blue flocculent precipitates after heating and reaction; placing washed, dried and ground blue powder into a crucible and roasting the crucible in a muffle furnace to obtain black CuO powder; dissolving the CuO powder in solvent and obtaining CuO liquor after centrifugal separation; and spin-coating the CuO liquor on the surface of a substrate by a spin-coating method and obtaining the CuO nano-film after drying and annealing. The method has the advantages that the method for preparing the CuO nano-film is simple in process and low in cost, and is environment-friendly, and the CuO nano-film can be obtained without the aid of special equipment, realizes a surface effect, a quantum size effect, a volume effect and macroscopic quantum tunneling effect, displays excellent physical and chemical properties in terms of magnetism, heat resistance, light absorption, chemical activity, catalyst, melting point and the like as compared with common CuO, and becomes one of organic materials with wide application.

The invention belongs to the field of fine chemical engineering, and particularly relates to a high-valence silver antibacterial agent and a preparation method thereof. The high-valence silver antibacterial agent is a silver-polyhexamethylene biguanidine complex with the electric potential zeta larger than 0. A metal part of the silver-polyhexamethylene biguanidine complex is Ag3+, and the antibacterial property of the complex is 200 times that of Ag+. A biological acceptable part is polyhexamethylene biguanidine (PHMB), compared with other guanidines with small molecular weights, the antibacterial property is good, the advantages are more obvious because of the synergistic antibacterial effect of PHMB and other antibiotics, and toxicity to cells and tissue of human bodies is smaller. The nanoscale or micron-size Ag(III)-PHMB complex high in antibacterial activity is prepared by means of reversed-phase microemulsion or the aqueous solution environment. On one hand, the Ag(III)-PHMB complex can reduce toxicity, and on the other hand, the metal part and the biological acceptable part achieve the synergistic antibacterial effect so that the antibacterial property of the antibacterial agent can be effectively improved. The antibacterial agent has a great significance in treatment of human epidermis infection.

The invention discloses a preparation method and application of water-soluble titanium dioxide nanoparticles. According to the preparation method, beta-cyclodextrin is used as an initial reaction material, a macroinitiator is synthesized by means of modification, a multi-arm star-shaped block copolymer is prepared by using an atom transfer radical polymerization (ATRP) technology and a technologywhich combines ATRP with 'click' chemistry, and the water-soluble titanium dioxide nanoparticles with uniform sizes and good dispersibility are prepared by taking the multi-arm star-shaped block copolymer as a monomolecular micelle template on the basis of a solution phase synthesis method. The titanium dioxide nanoparticles prepared by the preparation method are stable in quality, uniform in particle sizes, and can be stabilized at a nanoscale; the properties of the titanium dioxide nanoparticles can be effectively enabled to be exerted. The surfaces of the titanium dioxide nanoparticles aremodified, so that the titanium dioxide nanoparticles can be enabled to be evenly dispersed in water, and an aggregation effect is further avoided.

The invention relates to a preparation method of a fully-inorganic cesium-lead-halogen perovskite nanocrystalline film. The method includes 1) fully mixing DMF, oleic acid and oleylamine to obtain a mixed solution; 2) adding CsX and PbY2 separately into the mixed solution of the step 1), then stirring, standing and performing centrifugation to obtain a precursor solution; 3) washing drying and heating a film substrate sequentially, then spraying the precursor solution onto the film substrate when the substrate is still hot to obtain the fully-inorganic cesium-lead-halogen perovskite nanocrystalline film, wherein X and Y are one or more of Cl, Br and I. Compared with the prior art, the method can rapidly achieve one-time film formation, has the advantages of simple operation and low cost, and the prepared nanocrystalline film has advantages of uniform distribution, high crystalline quality, and good luminous performance, and has broad application prospects.

The invention relates to an anti-static floor coating and a method for preparing the same. The anti-static floor coating is prepared from components in percentage by mass as follows: 50wt%-70wt% of water, 2wt%-4wt% of a wetting dispersant, 0.5wt%-1wt% of a silicon modified defoamer, 0.5wt%-1wt% of a foam inhibitor, 0.05wt%-0.1wt% of a PH neutralizer, 0.3wt%-1wt% of a thickener, 10wt%-25wt% of pigment and filler, 0.5wt%-1wt% of a single-walled carbon nanotube, 15wt%-25wt% of resin emulsion, 0.2wt%-0.3wt% of an antiseptic fungicide and 0.5wt%-2wt% of a waterborne leveling agent, wherein the sumof mass percentages of the components is 100%. The single-walled carbon nanotube is applied to the anti-static floor coating, so that adding quantity of a conductive material is reduced greatly whilethe anti-static effect is realized, a conductive way, constructed on the basis of the conductive material, of the coating is replaced, coating thickness of the coating is reduced, conductive stabilityis improved, construction use amount and maintenance cost of the coating are reduced, the anti-static performance is excellent and lasting and is not affected by time, temperature and humidity, and film surface is smooth, attractive, wear-resistant, pressure-resistant and impact-resistant.

The invention belongs to the technical field of environment-friendly coatings and relates to an environment-friendly coating for an exterior wall and a preparation method thereof. The environment-friendly coating for the exterior wall comprises the following raw materials in parts by weight: 40 to 50 parts of an acrylic emulsion, 20-30 parts of polyether polyol, 20-30 parts of a filler, 10-20 parts of carboxymethyl betaine, 5-10 parts of isocyanate, 5-10 parts of ceramic fibers, 5-10 parts of nanometer silicon dioxide, 5-8 parts of a surfactant, 3-6 parts of a plasticizer, 1-3 parts of a drying agent, 1-2 parts of an anti-aging agent and 0.5-1 part of an anti-ultraviolet agent, wherein the anti-aging agent is prepared from zirconium oxide, nanometer titanium dioxide and modified graphene according to a mass ratio of (10-5): (4-8): 1. The environment-friendly coating is non-toxic, odorless, green and safe, has good elasticity, flexibility, waterproofness, aging resistance, abrasion resistance and ultraviolet resistance, short curing time, good hardness and long service life, can be directly painted, and is convenient to operate and applicable to exterior walls.

The invention belongs to the technical field of dechlorination and particularly relates to a normal-temperature gas-phase dechlorinating agent, a preparation method therefor and an application of thenormal-temperature gas-phase dechlorinating agent. The dechlorinating agent comprises a support and active ingredients, wherein the active ingredients comprise CaO and CuO, the support comprises bentonite and alkali modified fly ash, and the alkali modified fly ash is alkali solution modified fly ash. The preparation method disclosed by the invention comprises the steps of mixing calcium hydroxide, copper oxide, bentonite and the alkali modified fly ash, adding a binder into the mixture, carrying out strip extruding, carrying out drying, and carrying out roasting, thereby preparing the dechlorinating agent. The dechlorinating agent obtained by using the preparation method can achieve a dechlorination function at normal temperatures and has relatively high dechlorination accuracy and penetrating chlorosity.

The invention discloses a manufacturing method and application of a nano diamond and myohemoglobin modification based electrochemical enzyme sensor. The manufacturing method comprises the following steps: firstly, weighing and adding a proper amount of graphite powder and ion liquid into a mortar, sufficiently grinding to uniformly mix, filling into a glass electrode tube to compact, internally inserting a copper wire as a guide wire, thereby manufacturing a carbon ion liquid electrode (CILE); dispersing nano diamond (ND) into deionized water to prepare dispersion liquid of different concentrations, performing ultrasonic treatment for 2-3 hours to disperse uniformly, taking and dropwise coating a certain volume of nano diamond dispersion liquid to the surface of CILE, and drying in air atthe room temperature to obtain ND/CILE; fixing myohemoglobin (Mb) to the surface of ND/CILE to dry in air at the room temperature to obtain Mb/ND/CILE; and coating a Nafion alcohol solution to the surface of Mb/ND/CILE, and drying in air at the room temperature to obtain the electrochemical enzyme sensor (Nifion/Mb/ND/CILE). Nifion/Mb/ND/CILE is further taken as a working electrode for being applied to electrochemical detection of targets such as trichloroacetic acid, sodium nitrite and hydrogen peroxide, so that the effective and accurate measurement can be realized, detection response time is short, detection limit is low, linear range is wide, and the stability is good.

The invention relates to a metal dot color optical filter, a manufacturing method thereof and a liquid crystal display device. The metal dot color optical filter comprises a green light metal dot material with a fluorescence peak close to 530 nanometers or a red light metal dot material with a fluorescence peak close to 635 nanometers, wherein the particle size of the green light metal dot material and the particle size of the red light metal dot material are less than 2 nanometers. The manufacturing method of the metal dot color optical filter comprises the steps of: step 10, preparing the green light metal dot material; step 20, preparing the red light metal dot material; and step 30, preparing the metal dot optical filters by using the green light metal dot material and the red light metal dot material respectively. The liquid crystal display device comprises the metal dot color optical filter. The metal dot material adopted by the metal dot color optical filter has a quantum size effect, and the light color is simple to adjust; the adopted metal dot material has good solubility and can be prepared into ink; and the adopted metal dot material is simple to synthesize, free of toxic elements such as lead and cadmium, environmentally friendly, low in cost and suitable for commercial application.

The invention relates to a method for modifying a flame-retardant ethylene-vinyl acetate copolymer by a sol-gel method, and belongs to the technical field of flame-retardant materials. The method comprises the following steps of reacting and extruding by the sol-gel method, so as to prepare the ethylene-vinyl acetate copolymer/silicon dioxide master batch; melting and extruding the ethylene-vinylacetate copolymer, a compatilizer, an inorganic flame retardant, the ethylene-vinyl acetate copolymer/silicon dioxide master batch, a processing additive and other raw materials in a double-screw extruder; cutting particles, and performing injection molding, so as to obtain the ethylene-vinyl acetate nanometer flame-retardant composite material. The ethylene-vinyl acetate nanometer flame-retardantcomposite material has the advantages that the difficult-processing problem and the health problem due to adding of vapor-phase silicon dioxide are solved; the flame-retardant agent is well dispersedin the material, the heat release rate and smoke release amount of the composite material are smaller, the condensed phase is effectively promoted to form carbon, the flame-retardant property is effectively improved, and the good popularization and application value is realized.

The invention discloses a La-doped TiO2 nano-catalysis material used for low-temperature plasma catalysis synergistic effect. The La-doped TiO2 nano-catalysis material is prepared by the following steps: slowly adding absolute ethyl alcohol into butyl titanate; stirring and then adding polyethylene glycol, and continuing to stir to obtain a solution A; sequentially adding lanthanum nitrate and nitric acid into a mixed solution of the absolute ethyl alcohol and de-ionized water and controlling the pH to be 2-3 to obtain a solution B; dripping the solution B into the solution A and stirring to obtain TiO2 sol; sealing the TiO2 sol for a certain period of time to prepare a film; taking a ceramic electrode material as a base for plating the film; after plating the film, drying in a drying oven; repeatedly carrying out film plating and drying operation for 5 times to obtain a ceramic electrode base coated film; putting the ceramic electrode base coated film into a box type furnace and preserving heat at 20 DEG C for 0.5 hour; and preserving heat at 450 DEG C for 0.5 hour to obtain the La-doped TiO2 nano-catalysis material. According to the La-doped TiO2 nano-catalysis material, a technological flow is simple and convenient, industrial production is convenient to realize and the catalytic effect is good; and the degradation rate on benzene is 86% and is improved by 30% compared with that of a pure ceramic electrode material.

The invention discloses a preparation method of oil soluble titanium dioxide nanometer particles. According to the method, beta-cyclodextrin is taken as a primary reaction material and is synthesizedinto a macroinitiator through modification; multi-arm star block copolymer is formed through a technology of combination of ATRP and click chemistry; the oil soluble titanium dioxide nanometer particles with uniform sizes and excellent dispersity, based on a solution phase synthesis method and taking the multi-arm star block copolymer as a unimolecular micelle template, are formed. The surfaces ofthe TiO2 nanometer particles are modified, the TiO2 nanometer particles can be uniformly dispersed in an oily solvent, and the occurrence of aggregation effect can be avoided. The formed nanometer particles are stable in quality, the particle sizes are uniform and can be stabilized in nanoscale, and that performance of the TiO2 nanometer particles is realized can be effectively guaranteed.