82 results about "Titanium dioxide nanoparticles" patented technology

The invention belongs to the technical field of biomedical engineering, and particularly relates to a preparation method and application of a titanium dental implant surface coating, and the preparation method comprises the following steps: S1, pretreatment of a titanium dental implant matrix: sequentially carrying out grinding and polishing, ultrasonic cleaning and acid etching treatment; s2, preparation of a coating precursor solution: adding nano-hydroxyapatite powder, chitosan, gelatin and titanium dioxide nanoparticles into deionized water, stirring to form a suspension, then adding a silver nitrate solution, and continuously stirring to form the coating precursor solution; s3, coating a coating: coating the surface of the pretreated titanium dental implant matrix with the coating precursor solution by adopting an electrophoretic deposition method; and S4, drying and sintering: drying and sintering the coated titanium dental implant. According to the preparation method of the titanium dental implant surface coating, provided by the invention, the bonding strength between the coating and the titanium dental implant matrix can be improved.

The invention belongs to the technical field of optical materials, and particularly relates to an environment-friendly mercaptan optical resin material and a preparation method thereof. Comprising the following steps: (1) uniformly mixing a catalyst, a release agent and a polyisocyanate compound to prepare a mixture; (2) adding titanium dioxide nanoparticles with different particle sizes, which are modified by a polythiol compound and a sulfydryl silane coupling agent, into the mixture; and (3) heating and curing to prepare the environment-friendly mercaptan optical resin material. On the basis of small-particle-size titanium dioxide, a small amount of large-particle-size titanium dioxide is added. The large-particle-size titanium dioxide is not prone to agglomeration and good in dispersity, in the blending process, the granular large-particle-size titanium dioxide is easier to disperse, and agglomeration of small-particle-size titanium dioxide is prevented. Due to the addition of the small-particle-size titanium dioxide and the large-particle-size titanium dioxide, the mechanical strength of the mercaptan optical resin is further improved on the basis of maintaining the high refractive index of the mercaptan optical resin.

The invention relates to the field of biomimetic materials, in particular to a biomimetic self-cleaning anti-fouling aquaculture net cage material, a preparation method and application of the biomimetic self-cleaning anti-fouling aquaculture net cage material. 0.5 to 2.0 parts by weight of a carboxylated graphene nanosheet; 2.0 to 5.0 parts by weight of nitrogen-doped titanium dioxide nanoparticles; 1.0 to 3.0 parts by weight of silica nanoparticles; 5.0 to 10.0 parts by weight of calcium ion cross-linked modified sodium alginate; 1.0 to 3.0 parts by weight of octadecyl trichlorosilane; 0.5 to 1.5 parts by weight of lauryl sodium sulfate; through the synergistic effect of a double bionic structure and enhanced photocatalysis, the effective inhibition on attachment of various organisms is realized, and the inhibition rate on attachment organisms such as algae, bacteria and barnacles reaches 75% or above.

The invention discloses a Micro-LED device based on a charge compensation method and a preparation method of the Micro-LED device, relates to the technical field of nano luminescent materials and display, and solves the problems that the luminous efficiency of the Micro-LED device is reduced, the driving voltage is increased, the service life of the device is shortened and the like due to reduction of the crystal size during Mn < 4 + > doped fluoride nanocrystalline through Mg < 2 + > charge compensation. The Micro-LED device sequentially comprises a driving substrate layer, a blue light Micro-LED array layer, a light extraction layer, a color conversion layer and a packaging layer from bottom to top; the light extraction layer is a titanium dioxide nanoparticle layer; the color conversion layer is a Micro-LED device formed by mixing a solution of dispersed silver silicon core shell-cesium sodium manganese fluoride composite nanomaterial Ag (at) SiO2 / Cs2NaF6: Mn < 4 + > and Mg < 2 + > nanocrystal particles with a methyl methacrylate solution and coating the mixture on a substrate. By introducing the Micro-LED color conversion layer based on the charge compensation method, lattice charge unbalance is neutralized, lattice defects are reduced, and formation of a Micro-LED device with high brightness and high stability is facilitated.

The application belongs to the technical field of sensitive materials, and discloses a high-performance TiO2@In2O3 / Pd sensitive film for a MEMS gas sensor, a synthesis method thereof and a MEMS gas sensor. The method comprises the following steps: synthesizing mesoporous TiO2 nanoparticle balls; mixing indium salt, an alkaline compound, a surfactant and the mesoporous TiO2 nanoparticle balls uniformly, and then performing hydrothermal reaction; centrifuging, washing and drying the product of the hydrothermal reaction, and then performing first annealing treatment in an air atmosphere to obtain In2O3-coated titanium dioxide nanoparticle balls TiO2@In2O3; modifying palladium nanoparticles to the nanoparticle balls TiO2@In2O3 by a solution method, centrifuging, washing and drying, and then performing second annealing treatment in a hydrogen atmosphere to obtain In2O3-coated titanium dioxide nanoparticle balls TiO2@In2O3 / Pd with Pd modification; and manufacturing the nanoparticle balls TiO2@In2O3 / Pd into a sensitive film. The sensitive film manufactured by the above method can improve the sensitivity of gas detection.

An electrocatalytic filter apparatus is provided for use with one or more of a heating, ventilating, refrigerating or air conditioning unit and a power source, the electrocatalytic filter apparatus comprising: a frame including a first side and a second side, each side including at least one aperture; a water inlet which is retained by the frame; a water outlet which is retained by the frame; at least two functionalized filters which are retained by the water inlet and the water outlet, are in parallel relation and are spaced apart to define an interstitial space which is in fluid communication with the water inlet and the water outlet, the functionalized filters including fiberglass or carbon fibers, wherein the functionalized filters are functionalized with low iron oxide, iron-doped titanium dioxide nanoparticles; an anode wire mesh which is retained by the frame and is disposed between the first side of the frame and one functionalized filter; a hydrogen gas generator, which is a second wire mesh anode, is retained by the frame and is disposed beside the second side of the frame; and a cathode wire mesh which is retained by the frame and is disposed between the second wire mesh anode and the other functionalized filter and is in parallel relation with the second anode wire mesh to define a channel which is fluid communication with the water inlet and the water outlet.

The invention discloses a method for growing titanic acid / titanium dioxide nanoparticles on a titanium carbide Mxene sheet layer, and relates to a method for growing titanic acid / titanium dioxide nanoparticles on the surface of a titanium carbide Mxene sheet layer structure. The method comprises the following steps: firstly, etching titanium aluminum carbide at room temperature by adopting hydrofluoric acid to obtain a layered titanium carbide Mxene material, then dispersing the layered titanium carbide Mxene material in hydrogen peroxide with the mass percent concentration of 20-30%, simultaneously adding 0.6 ml of 65% nitric acid, and reacting for 24-72 hours at the temperature of 20-80 DEG C, so that titanic acid nanoparticles can grow on the surface of a titanium carbide Mxene lamellar structure; and subsequently carrying out heat treatment in an air atmosphere at 200-500 DEG C, and converting the titanic acid into anatase titanium dioxide. The preparation temperature is low without high pressure; the nanoparticles keep a lamellar structure aggregation state, and are expected to be applied to the fields of adsorption, photocatalysis and the like.

The invention relates to the technical field of new materials, and discloses a three-layer structure multifunctional ionic elastomer and a preparation method and application thereof. The three-layer structure multifunctional conductive elastomer is formed by compounding three layers, the bottom layer is prepared from octadecyl methacrylate, 4-hydroxybutyl acrylate and polyurethane diacrylate, and the bottom layer has the performance of adhesion / desorption according to needs through temperature stimulation; the middle layer is prepared from 1-butyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide, butyl acrylate, tridecafluorooctyl methacrylate and polyethylene glycol diacrylate, so that the elastomer has ionic conductivity; and the surface layer is formed by fluorine-containing titanium dioxide nanoparticles, so that the elastomer has super-hydrophobic and self-cleaning capabilities. The elastic body can serve as a sensor to monitor movement of a human body and be used for underwater information transmission. The multifunctional ionic elastomer with the three-layer structure can meet the requirements of various scenes, such as wearable equipment, electronic skin, underwater sensors and waterproof materials.

The invention discloses a radiation refrigeration material, a preparation method and a preparation device, and the radiation refrigeration material comprises a primer layer, a middle paint layer and a finish paint layer, the primer layer is doped with titanium dioxide nano particles; the middle paint layer is doped with aluminum oxide or barium sulfate nanoparticles; and the finish paint layer is doped with silicon dioxide nanoparticles and a fluorescent material. The preparation method of the radiation refrigeration material comprises the following steps: S1, respectively preparing the primer, the intermediate paint and the finish paint through weighing, stirring, grinding and filtering processes; s2, the surface of an object is coated with primer, and a primer layer is formed; s3, the surface of the primer layer is coated with intermediate paint, and an intermediate paint layer is formed; and S4, the surface of the middle paint layer is coated with finish paint to form a finish paint layer. The radiation refrigeration material preparation device comprises a stirring barrel, a stirring shaft and a feeding pipe. According to the scheme, the spectral selectivity, durability, environmental friendliness and attractiveness of the refrigeration material can be effectively guaranteed.

This invention relates to a method for preparing a high-durability transparent cooling self-cleaning coating for the protection of stone cultural relics, comprising the following steps: (1) dispersing silica nanoparticles, titanium dioxide nanoparticles and zinc oxide nanoparticles in a mixed solution and ultrasonicating to obtain a mixed dispersion; (2) dispersing silica nanoparticles in the mixed solution and ultrasonicating to obtain a dispersion containing only silica nanoparticles; (3) adding silane coupling agent and hydrochloric acid to the mixed dispersion and silica dispersion respectively to obtain solution A and solution B; (4) adding water-diluted aqueous emulsion to solution B to obtain an adhesive layer solution for spraying; (5) ultrasonicating the adhesive layer solution and spraying it onto the sample, allowing it to cure naturally; (6) ultrasonicating solution A and continuing to spray it onto the sample; (7) drying the sprayed sample at room temperature to obtain a transparent superhydrophobic coating; the coating has high light transmittance and excellent hydrophobicity, oleophobicity and self-cleaning properties.

This invention relates to the field of self-cleaning coating materials, and discloses the preparation and application of a nanofiber-confined Fe single-atom self-cleaning coating material. The invention uses wood nanofibers as a carbon-based carrier to obtain nanofiber-confined Fe single-atom materials. The three-dimensional network structure generated during the acidic hydrolysis of methyl orthosilicate enhances the bonding between the nanofiber-confined Fe single-atom materials, nano-silica, and nano-titanium dioxide nanoparticles. After hydrolysis, a diluent is added, and the reaction proceeds to obtain the nanofiber-confined Fe single-atom self-cleaning coating material. This self-cleaning coating material has a simple process, high operability, excellent antistatic properties, superhydrophilicity, and photocatalytic activity. It exhibits excellent anti-fouling potential in self-cleaning coating material applications and has broad application prospects.

The application provides a titanium dioxide microwhisker, a preparation method and an application. The titanium dioxide microwhisker is prepared by the following method: (1) providing a titanium sol solution; (2) adding titanium dioxide nanoparticles into an alcohol solution of sodium dodecyl benzene sulfonate to obtain a titanium dioxide solution; (3) mixing the titanium sol solution and the titanium dioxide solution to obtain an electrostatic spraying solution; and (4) electrostatically spraying the electrostatic spraying solution, collecting the product and drying to obtain the titanium dioxide microwhisker. The obtained titanium dioxide microwhisker has a microscale size and a large specific surface area, and the preparation method is simple and can be used for industrial production in large quantities.

The invention discloses a modified titanium disulfide nanosheet reinforced aluminum-based composite material. The modified titanium disulfide nanosheet reinforced aluminum-based composite material is composed of 85-95 wt% of an aluminum alloy matrix and 5-15 wt% of modified titanium disulfide nanosheets. Wherein the reinforced phase modified titanium disulfide nanosheet is a mesoporous titanium dioxide nanoparticle composite titanium disulfide nanosheet, the molar ratio of titanium dioxide to titanium disulfide is 1: (3-4), the reinforced phase has good conductivity, the binding force of a mesoporous structure and a matrix is strong, and the mechanical property of the material can be effectively improved. According to the preparation method of the aluminum-based composite material, a high-energy ball milling method and a vacuum melting method are combined, the impurity content of the material can be reduced, and the distribution uniformity of a reinforced phase is improved. The whole material has high strength and high hardness, the conductivity superior to that of commercial pure aluminum, the comprehensive mechanical property is excellent, and the application prospect is wide.

This invention relates to a sialylated glycoprotein detection reagent, its preparation method, and its application, belonging to the field of biodetection technology. The detection reagent uses purified water as a solvent and comprises the following components: surface-modified titanium dioxide nanomaterials, metal ions, a pH adjuster, and a solvent. The surface-modified titanium dioxide nanomaterials are obtained by dispersing titanium dioxide nanoparticles in an organic solvent and reacting them with a silane coupling agent. The pH value of the sialylated glycoprotein detection reagent is ≥ 8.0. The reagent of this invention utilizes the high affinity of modified titanium dioxide nanomaterials for sialic acid to specifically aggregate sialylated glycoproteins in blood into particles, facilitating observation. This reagent exhibits good stability, high sensitivity, and strong specificity, making it suitable for rapid tumor screening of blood smear samples.

The invention relates to the technical field of water treatment, and discloses a bamboo-based material for water treatment, which comprises the following components in parts by weight: 5-7 parts of carbon nanotube modified chitosan and 4-8 parts of modified bamboo powder, a preparation method of the modified bamboo powder comprises the steps that firstly, bamboo wood is smashed to the particle size, the smashed bamboo wood is placed in diluted hydrochloric acid, stirring reaction is conducted, surface impurities and part of lignin are removed, then deionized water is used for washing to be neutral, drying is conducted to be constant weight, and pretreated bamboo powder is obtained; 2, the pretreated bamboo powder is dispersed in deionized water, titanium dioxide nanoparticles are added, ultrasonic dispersion and ultrasonic power are carried out, a uniform suspension is formed, then epoxy chloropropane is added, a stirring reaction is carried out, and the modified bamboo powder is obtained. The bamboo-based material for water treatment has good adsorption and removal effects on metal ions.

According to the branched chain type silane coupling agent as well as the preparation method and the application thereof, a plurality of organic functional groups for anchoring an organic matrix are introduced, and the structures, the number and the positions of the functional groups are optimized, so that the interface performance between an organic material and inorganic nanoparticles is greatly improved, the steric hindrance of a reaction is reduced, and the reaction time is shortened; the modification effect of the nano particles is improved. Taking titanium dioxide nano particle modification as an example, the transmittance of titanium dioxide dispersion liquid modified by the branched chain type silane coupling agent provided by the invention can reach 93%.

The invention discloses a nano-composite pressure-reducing injection-increasing oil displacement system and a preparation method thereof, and belongs to the technical field of petroleum and natural gas exploitation chemical agents, the nano-composite pressure-reducing injection-increasing oil displacement system comprises: an acid base solution: hydrochloric acid, hydrofluoric acid, ethylenediaminetetra (methylene phosphonic acid) or ethylenediaminetetraacetic acid; a block type quaternary ammonium salt-betaine surfactant; fluorine-modified graphene oxide; modifying the titanium dioxide nano particles by using amino silane; silica nanoparticles; a fluorocarbon discharge aiding agent; an organic silicon defoaming agent; and deionized water. Through the synergistic effect of nano-compounding and molecular design, the integrated performance of pressure reduction, injection increasing and oil displacement is achieved, and the oil displacement agent is suitable for pressure reduction, injection increasing and oil displacement operation under the high-temperature and high-salt reservoir condition.

The invention provides a fiber-reinforced silicon zirconium oxide composite aerogel thermal insulation material and a preparation method thereof, and belongs to the technical field of thermal insulation materials. The invention relates to a fiber-reinforced silicon zirconium oxide composite aerogel thermal insulation material and a preparation method thereof. The preparation method comprises the following steps: providing silicon oxide fibers, and carrying out pretreatment to obtain a silicon oxide fiber preform; the preparation method comprises the following steps: preparing cerium-doped titanium dioxide nanoparticles from tetrabutyl titanate, cerium nitrate, absolute ethyl alcohol and water by adopting a sol-gel method; the preparation method comprises the following steps: adding a silicon source and zirconium oxychloride into an ethanol solution, stirring, adjusting the pH value to 3.0-4.0, adding cerium-doped titanium dioxide nanoparticles, and continuously stirring to form sol; and S3, soaking a silicon oxide fiber preform into the sol prepared in the step S3, pressurizing to fill the silicon oxide fiber preform with the sol, and after gelation, performing aging treatment, freeze drying and heat treatment to finally obtain the product. On the basis of improving the thermal insulation performance of the product, the mechanical property of the product is improved, and the phenomena of shrinkage, collapse and the like generated in the use process of the product are reduced.

The application provides an LED reflective cup coating and a preparation method thereof, and belongs to the technical field of composite coatings. The method comprises the following steps: dispersing zinc oxide nanoparticles and titanium dioxide nanoparticles in ethanol containing polydimethylsiloxane, mixing and stirring to obtain a ZnO / TiO2-PDMS mixed solution; under vacuum, argon is introduced to deposit a pure titanium bottom layer on the surface of a pretreated substrate; then, the Ti target and the Ag target are simultaneously opened, a titanium-silver layer is deposited, nitrogen is introduced, a titanium nitride-silver layer is deposited, the Ag target is closed, a titanium nitride layer is deposited, and a composite substrate reflective layer is obtained; the ZnO / TiO2-PDMS mixed solution is added dropwise on the surface of the composite substrate reflective layer, coating and baking are performed, and an LED reflective cup coating is obtained. The application realizes high reflectivity, and improves the sulfur resistance and thermal stability of the coating.

The invention relates to the technical field of anti-dazzle films, in particular to a flexible anti-dazzle film with a super-hydrophobic surface and a preparation method and application of the flexible anti-dazzle film. Comprising a PET substrate, PU nano-fibers forming a network are embedded in the PET substrate, a fluorinated titanium dioxide nano-particle coating is arranged on the surface of the PET substrate, the light transmittance of the prepared flexible anti-glare composite film can reach 92.1%, the haze can reach 93.3% and is far better than that of a commercial anti-glare film in the prior art, and meanwhile the flexible anti-glare composite film has the advantages that the super-hydrophobicity is achieved, the water contact angle is 165 degrees, the sliding angle is 1.2 degrees, and the anti-glare effect is good. The self-cleaning and anti-fog functions are realized.

The invention discloses a lithium ion battery auxiliary coating material as well as a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The invention provides a porous composite oxide formed by silicon dioxide nanowires and titanium dioxide nanoparticles, the whole porous composite oxide is of a porous structure, and when the porous composite oxide is used as an auxiliary coating material of a lithium ion battery, the surface of a negative graphite pole piece can be coated with the porous composite oxide to form a porous coating. Both SiO2 and TiO2 have excellent electrolyte infiltration capacity, and the porous structure formed by nanoscale materials can greatly improve the infiltration performance of the electrolyte, so that lithium ions can be quickly diffused on the diaphragm side and the negative electrode surface side, the rate capability of the lithium ion battery is favorably exerted, and the service life of the lithium ion battery is prolonged. And meanwhile, uniform distribution of charging and discharging current obtained by the graphite cathode due to the fact that the infiltration electrolyte becomes strong is facilitated.

The invention relates to the technical field of modified warm mixing agents, and discloses a nano modified warm mixing agent preparation method which comprises the following preparation steps: 1) adding silicon dioxide nanoparticles, titanium dioxide nanoparticles, a surface modifier and a dispersant into deionized water to form a primary mixed solution; 2) adding a sodium hydroxide solution into the primary mixed solution; 3) performing ultrasonic treatment on the primary mixed solution; 4) adding ferric trichloride hexahydrate, ferrous chloride tetrahydrate and a nucleation inhibitor into the primary mixed solution to form a secondary mixed solution; 5) adding a sodium hydroxide solution into the secondary mixed solution; (6) heating and stirring the secondary mixed solution in a reaction kettle to form a reaction mixed solution; 7) separating the silicon dioxide nanoparticles and the titanium dioxide nanoparticles in the reaction mixture to form mixed nanoparticles, and drying the mixed nanoparticles to obtain modified nanoparticles; and 8) mixing the modified nanoparticles with the warm mixing agent to form the nano modified warm mixing agent.

The invention discloses preparation and performance research of a dye-sensitized solar cell photo-anode based on {PW12O40} (at) Cu-Melamine / GO polyacid salt, and relates to preparation and performance research of a solar cell photo-anode. The invention aims to solve the problems of low energy utilization in a visible light region and low cell efficiency caused by compounding of interface photon-generated carriers when a dye-sensitized cell photo-anode is prepared under the conditions of the prior art, and provides a preparation method of a photo-anode capable of improving the performance of a device. The preparation method disclosed by the invention comprises the following steps: 1, preparing polyacid-loaded titanium dioxide nanoparticles by adopting a gel-sol method; 2, preparing a polyacid salt {PW12O40} (at) Cu-Melamine / Go powder body; and 3, preparing a photo-anode (uniformly mixing the modified powder with ethyl cellulose, turpentine alcohol and ethanol, carrying out silk-screen printing to form a film, and then carrying out high-temperature calcination). According to the invention, the photo-anode material capable of broadening spectrum absorption and inhibiting carrier recombination can be obtained.

The invention discloses soluble rubber based on titanium dioxide nanoparticle modification and a preparation method of the soluble rubber. The soluble rubber is prepared from the following raw material components in parts by mass: 90 to 100 parts of polyurethane rubber, 20 to 35 parts of an auxiliary hydrolysis agent, 0.5 to 1.5 parts of a plasticizer, 25 to 35 parts of carbon black, 1 to 2 parts of a vulcanizing agent and 0.5 to 3 parts of titanium dioxide nanoparticles. Through strong interaction between nanoparticles and a polyurethane rubber matrix, the binding force and dispersion uniformity between rubber molecular chains are effectively improved, so that the mechanical properties such as tensile strength, wear resistance and tear resistance of the material are remarkably improved, and meanwhile, the original good hydrolytic stability and chemical medium resistance of the material are kept; the polyurethane rubber still keeps stable physical and mechanical properties and sealing reliability in a high-temperature, high-pressure and strong-corrosion underground environment, and the comprehensive application requirements of an underground temporary plugging tool sealing element on materials under extreme working conditions are effectively met.

The invention discloses a high-hardness anti-aging PVC (polyvinyl chloride) profile with an ordered micro-nano structure as well as a preparation method and a formula of the high-hardness anti-aging PVC profile with the ordered micro-nano structure, and the high-hardness anti-aging PVC profile comprises general PVC profile ingredients and a two-dimensional inorganic lamellar material with the surface modified with titanium dioxide nanoparticles, the two-dimensional inorganic lamellar material of which the surface is modified with the titanium dioxide nanoparticles is mixed in the general PVC profile ingredients, and the PVC profile has an ordered micro-nano structure. The PVC profile prepared by the invention has the properties of high hardness, aging resistance and the like.

The application discloses a preparation method of visible light response water dispersible titanium dioxide nanomaterial. Under a solvothermal condition, in an alcoholysis process of alkoxy titanate, the alcohol hydroxyl is oxidized into aldehyde group by sodium hypochlorite by using the reducing property of low-carbon dihydric alcohol, and is further oxidized into carboxyl group, which is adsorbed on the surface of newly generated titanium dioxide nanoparticles to give the material excellent water dispersibility. Meanwhile, the oxidation product, chlorine ion, enters the titanium dioxide lattice to form chlorine ion doped titanium dioxide nanomaterial, which expands the absorption spectrum of titanium dioxide to the visible light region and improves the utilization efficiency of sunlight.

The application discloses a long-acting anti-ultraviolet fabric and a preparation method thereof. A silk fibroin and titanium dioxide particle composite coating is used for an outer fabric. The natural film-forming property of the silk fibroin can form a dense protective layer, effectively fixing the titanium dioxide nanoparticles, avoiding the defect that traditional inorganic sunscreen agents are easy to fall off. A polyamide / cotton blended substrate is used for loading microcapsules in an inner fabric. The moisture absorption and air permeability of the cotton fibers are retained, and the wear resistance of the polyamide is used to ensure the stability of the microcapsule adhesion, realizing the controlled release of the anti-ultraviolet core material. The fabric can still maintain excellent protective performance in a hot and humid environment, prolongs the service life of the sunscreen agent, strengthens the light protection efficiency, and further optimizes the moisture permeability of the microcapsule adhesion, so that the inner layer can effectively conduct the moisture emitted by the skin to the outer layer for discharge. The anti-ultraviolet performance and moisture permeability of the anti-ultraviolet film composite fabric in the prior art are insufficient after being used for a long time.

The application belongs to the technical field of touch modules, and discloses an anti-glare and anti-electromagnetic interference touch module, which comprises an anti-glare layer, one end of the anti-glare layer is connected with a touch sensing layer, one end of the touch sensing layer away from the anti-glare layer is connected with an anti-electromagnetic interference layer, and one end of the anti-electromagnetic interference layer away from the touch sensing layer is connected with a support back plate for supporting and protecting; the anti-glare layer adopts acrylic substrate and nano-silicon dioxide columnar structure, is matched with 0.1mm silicone optical adhesive layer and 50nm titanium dioxide nanoparticles, scatters strong light into diffuse reflection light, reduces the interface reflectivity to below 3% through refractive index gradient matching, provides a clear optical environment for the touch sensing layer, and ensures the visibility of touch operation.

The invention discloses a preparation method of titanium dioxide nanocrystals and a stable dispersion liquid of the titanium dioxide nanocrystals, and belongs to the field of titanium dioxide. The preparation method comprises the following steps: mixing a titanium source and an alcohol solvent to form an alcohol solution of the titanium source; dropwise adding acid, mixing and stirring, then dropwise adding water, and continuously mixing and stirring; carrying out reflux reaction, cooling after the reaction is finished, and separating to obtain titanium dioxide nanoparticles; and the boiling point of the alcohol solvent is 150-260 DEG C. The preparation method also comprises the following steps: washing the titanium dioxide nanoparticles, dispersing the titanium dioxide nanoparticles in a solvent, dropwise adding the surface modification ligand, uniformly stirring, separating and drying to obtain yellow powdery solid particles. The method overcomes the problems of insufficient TiO2 crystallization, low electron mobility and poor dispersion stability in the existing low-temperature sol-gel acid catalysis system, is a synthetic method capable of forming high-mobility anatase phase TiO2 nanocrystals at a relatively high temperature, and realizes long-term stable dispersion of the anatase phase TiO2 nanocrystals in ethanol / isopropanol and other solvents.

The invention discloses a photochromic laser printing film and a preparation method and application thereof.The photochromic laser printing film is composed of a base material layer, a photocatalytic discoloration layer and a protective layer, materials of the photocatalytic discoloration layer comprise a photocatalyst and metal ions capable of being reduced, and the colors of the metal ions change before and after being reduced; the photocatalyst is titanium dioxide nanoparticles and / or zinc oxide nanoparticles. The metal ions are reduced by utilizing photo-induced electrons of the semiconductor photocatalyst to form the irreversible metal nanoparticle color development layer, and once color change occurs, the color cannot be restored through illumination or other means, so that the anti-counterfeiting performance is remarkably improved. The preparation method is simple in process, free of release of harmful substances and suitable for large-scale industrial application, the green and environment-friendly requirements are met, the preparation process is easy to integrate with an existing production line, and the production cost is reduced.