91 results about "Silica coating" patented technology

The invention belongs to the technical field of environmental protection, and provides a preparation method of an imine-modified functionalized mesoporous magnetic silicon dioxide nano material. The method comprises the following steps: synthesizing Fe3O4 magnetic nanoparticles in a Fe < 2 + > / Fe < 3 + > alkaline hydrolysis system through a coprecipitation method; then coating the magnetic nanoparticles with an amorphous silicon dioxide layer by taking TEOS (tetraethoxysilane) as a silicon source by adopting a sol-gel method, so as to prepare magnetic silicon coated nanoparticles; the prepared nano-particles are subjected to secondary silicon coating guided by a cetyl trimethyl ammonium bromide (CTAB) mesoporous template agent, and mesoporous magnetic silicon nano-particles are formed after calcination; and finally, carrying out surface amination modification on the mesoporous magnetic silicon nano-particles by utilizing an amino silane coupling agent, and then carrying out condensation reaction on the mesoporous magnetic silicon nano-particles and various aldehyde derivatives to construct imine bonds, so as to obtain the imine-modified functionalized mesoporous magnetic silicon dioxide nano-material. The imine-modified functionalized mesoporous magnetic silicon dioxide nano-material formed by the invention has the characteristics of efficient adsorption, rapid magnetic recovery and excellent environmental stability, and can effectively remove polystyrene micro-plastics and organic pollutants in a water body.

The application discloses an amorphous silicon dioxide coating prepared based on micro-arc oxidation, a preparation method and application thereof, and belongs to the technical field of metal surface protection and silicon dioxide coating. In the application, a magnesium alloy, an aluminum alloy, a titanium alloy, a titanium-aluminum base and a nickel-aluminum base are used as anodes and are placed in a micro-arc oxidation tank, a hydrolytic solution of organic silicon is used as an electrolyte, and an amorphous silicon dioxide coating with a thickness of more than 100 mu m can be prepared within 20 minutes through a step-by-step step-incremental constant potential control means. The application utilizes the advantages of the micro-arc oxidation process and the sol-gel process, avoids their shortcomings, and realizes the superimposed synergistic effect of "1+1>2". The process steps of the application are simple, and the application is very suitable for full-automatic operation and processing in industry. The amorphous silicon dioxide coating with the required thickness, wear resistance, corrosion resistance, erosion resistance, oxidation resistance and other characteristics can be prepared by changing the electrolyte concentration, the micro-arc oxidation time and the electric control parameters, or through the conventional micro-arc oxidation constant voltage and constant current control means.

The invention belongs to the field of polymer coatings, and provides an aliphatic polyurethane finish paint with high adhesion resistance and a preparation method thereof. According to the invention, a polyurethane phase and a polyacrylate network are adopted to construct a semi-interpenetrating network structure, cyclic carbonate and hydrolyzable silane end groups are introduced into double-end functionalized polysiloxane, and a silicon-oxygen network surface layer is self-assembled after coating and curing; the high crosslinking density with the gel fraction being greater than or equal to 85%, the wear-resistant and anti-slip performance with the dry friction coefficient being greater than or equal to 0.50 and the abrasion mass loss being less than or equal to 0.030 g / 500 r, the ultra-low surface energy anti-dirt performance with the water contact angle being greater than or equal to 105 degrees and the surface free energy being less than or equal to 22 mN / m and the environment-friendly characteristic that the volatile organic compound content is less than or equal to 50 g / L are achieved; the three technical contradictions of high gel fraction and ultralow surface energy silica surface layer coupling, high hardness wear resistance and high friction coefficient maintenance, and high solid content and low volatility organic compound processing window and nano gradient silica surface layer construction are solved, and the nano gradient silica coating has wide application value in the field of industrial terraces and metal base material coatings.

The application discloses a multifunctional intelligent photovoltaic window which is assembled by a multifunctional variable color unit and a silicon solar cell, and has the characteristics of wide wave adjustment, self-driving and self-cleaning. The laminated structure multifunctional variable color unit mainly comprises a vanadium dioxide / silicon dioxide / polyurethane nanocomposite film, a polymer stable liquid crystal with a near-crystal-cholesteric phase transition, an indium tin oxide and a silicon dioxide coating, which are respectively used as a near-infrared light adjusting layer, a visible light adjusting layer, an electrothermal layer and a super-hydrophobic layer. Based on the above design, the intelligent photovoltaic window can realize dynamic adjustment of the transmittance in the wavelength range of 380-2500 nm, so that the ideal energy-saving effect is achieved. In combination with the high output power of the silicon cell and the excellent direct current heating effect of the indium tin oxide, the self-driving characteristic of the intelligent photovoltaic window is realized, and the energy-saving effect is further improved. In addition, the silicon dioxide super-hydrophobic coating with a contact angle of 150-160 degrees effectively solves the environmental dependence of the intelligent photovoltaic window, and the intelligent photovoltaic window also has a good vision under complex weather conditions such as rain and snow. The application can widen the application of the intelligent photovoltaic window in the fields of energy-saving buildings, automobiles and flexible photoelectric devices.

This invention belongs to the field of tertiary oil recovery technology, specifically relating to a CO2-switched magnetically driven nanoparticle, its preparation method, and its application. The magnetically driven nanoparticles are silica-coated Fe3O4 nanoparticles. The surface of the silica coating is further modified with amidine groups to act as CO2 switches. These CO2 switches cause the hydrophilicity of the magnetically driven nanoparticles to increase with the increase of CO2 solubility in the solution in which they are located. This invention integrates emulsification and demulsification functions through the CO2 switch loaded on the surface of the magnetically driven nanoparticles. Furthermore, the particles can be recycled using their own magnetic response, reducing costs. This nano-displacement agent can solve the problems of poor efficiency, ineffective oil-water separation, high economic costs, and environmental impact associated with existing displacement agents.

To appropriately improve adhesiveness between an encapsulation part which encapsulates a resonator and a device chip without increasing the number of steps in a manufacturing process in an acoustic wave device.SOLUTION: A pattern 5 includes a first layer 5a consisting of a conductive material, a second layer 5b consisting of polyimide, and a third layer 5c consisting of a conductive material. A resonator 3 consists of the first layer 5a, and a wire 4 consists of both or any one of the first layer 5a and the third layer 5c. An encapsulation part 6 consists of a support layer 6a which is formed so as to enclose a formation region of the resonator 3 and consists of an insulating synthetic resin and a cover layer 6b which is supported on the support layer 6a. At least a part of a functional surface 2a and the first layer 5a is covered by a coating 5d consisting of silicon dioxide. In a single-layer region where only the second layer is positioned on the functional surface 2a, the coating 5b and the support layer 6a are fixed by the second layer 5b.SELECTED DRAWING: Figure 3

The invention relates to the technical field of photovoltaic glass processing, and discloses a tempering process of high-strength 2.0 mm coated photovoltaic glass, the process comprises cleaning treatment, coating treatment, curing treatment, tempering treatment and post-treatment, surface impurities and moisture are removed through the cleaning treatment, meanwhile, a nano-scale porous silicon dioxide coating layer is formed through the coating treatment, and the surface of the photovoltaic glass is subjected to the post-treatment. The film layer is preliminarily cured through curing treatment, so that the surface cleanness of the glass and the completeness of the coating layer are ensured, and a good foundation is provided for toughening treatment; through partition temperature control of heating treatment and cooperation of a quartz roller transmission system and driving of a variable-frequency synchronous motor and a servo motor, it is guaranteed that glass passes through all heating areas at a constant speed, the heating process is uniform and stable, meanwhile, a high-pressure air grid system is adopted for cooling treatment for quenching, air grid parameters are controlled, and cooling rate matching is guaranteed; and defects caused by uneven stress distribution are avoided.

The application relates to the technical field of wastewater treatment, in particular to a preparation method of a porous medium plate, a plasma device and a wastewater treatment equipment. The application dips an aluminum oxide plate into a first sol containing silicon dioxide to obtain an aluminum oxide plate loaded with a silicon dioxide coating. The silicon dioxide coating has a large specific surface area and hydroxyl groups exist on the coating surface, the hydroxyl groups can be combined with or adsorbed by low-lifetime active substances, the retention time of the low-lifetime active substances is prolonged, and the concentration and utilization rate of the low-lifetime active substances are improved. Due to the existence of the hydroxyl groups and the large specific surface area of the silicon dioxide coating, the silicon dioxide coating has strong adsorption capacity, so that the active substances adsorbed on the surface of the medium plate are increased, and then the reaction rate of the active substances and perfluorinated compounds is improved, so that the perfluorinated compounds are more completely degraded. The silicon dioxide has good dielectric properties, can enhance the dielectric constant and resistivity of the medium plate, and plays a positive role in the generation and transmission of the plasma.

The present invention provides hydrophobic coatings for transparent surfaces and processes of producing the same, whereby the invention is embodied by a transparent multilayer structure, comprising: a transparent substrate having an antireflective coating; a transparent surface coating comprising reactive hydroxyl groups, such as a silicon dioxide coating applied onto said transparent substrate; and a hydrophobic coating applied onto the outer layer of said transparent surface coating comprising reactive hydroxyl groups, whereby said hydrophobic coating comprises a fluorine free silicone polymer.

The utility model relates to the technical field of environment-friendly bricks, and discloses a water-permeable environment-friendly brick which comprises a brick body, an upper surface layer is fixedly connected to the top of the brick body, a lower bottom layer is fixedly connected to the bottom of the brick body, a reinforcing device is fixedly connected to the interior of the brick body, and a drainage device is fixedly connected to the interior of the brick body. A fixing rod is fixedly connected to the interior of the brick body, a first reinforcing rib is fixedly connected to the side face of the fixing rod, and a second reinforcing rib is fixedly connected to the side face of the first reinforcing rib. The silicon dioxide coating on the upper surface layer increases the hardness and anti-pollution capacity of the surface of the brick body, the design of the clamping grooves and the clamping blocks on the lower bottom layer facilitates splicing and fixing of the water-permeable environment-friendly bricks, impurities are effectively prevented from entering the brick body through the arrangement of the water-permeable layer and the filtering layer, and smoothness of water flow is guaranteed.

The invention discloses an anti-bending and anti-fracture bamboo louver blade and a preparation process thereof, and belongs to the field of building decoration materials. In order to solve the problems that a traditional bamboo louver blade is prone to breakage and bending failure due to the fact that bamboo wood is low in cross grain strength and high in hygroscopicity, performance breakthrough is achieved through multi-dimensional synergistic modification. The preparation process comprises the following steps: selecting bamboo wood of 3-5 years old, cutting the bamboo wood, performing ultrasonic cleaning with sodium carbonate, treating linen fibers with acetic acid and a silane coupling agent, performing vacuum permeation and plastification with a glycerol-citric acid solution, constructing a bamboo wood-fibrofelt-bamboo wood three-layer composite structure, performing hot-pressing curing, and performing gradient drying, low-temperature circulation and beeswax-nano silicon dioxide coating edge sealing. Experiments show that the louver blade can resist bending for 5200 times, the elongation at break is 8.2%, the bending strength is 140 MPa, and the impact strength is 65 kJ / m < 2 >. Compared with a single reinforcing process of resin impregnation or recombined fibers, the bending fatigue resistance is improved by 32.7%-46.2% through cooperation of plasticizing modification, a laminated structure and surface protection, and the method is suitable for high-end building decoration scenes.

The invention provides a preparation method of a wear-resistant thermal shrinkage film, which comprises the following steps: optimizing a raw material formula, forming a three-layer structure, namely a fluorine-containing layer, a self-repairing modified layer and a supporting layer, inducing filler orientation by a gradient drawing process in combination with a pulsed magnetic field, and performing surface corona modification treatment and nano silicon dioxide coating, thereby obtaining the wear-resistant thermal shrinkage film. The prepared heat shrink film has remarkable advantages in the aspects of wear resistance, self-repairability, mechanical strength, optical performance and stability, and is particularly suitable for the fields of high-end cigarette packets, electronic devices and the like which have extremely strict requirements on packaging materials. Experimental results show that the wear-resistant life of the heat shrink film is doubled, the self-repairing rate reaches 88-95%, the tensile strength is 78-85 MPa, and the light transmittance is 89-93%.

The invention relates to the technical field of insulating gloves, and discloses a manufacturing method of an arc-preventing insulating glove, which comprises the following steps: preparing a double-layer knitted glove, the double-layer knitted glove comprises an outer layer formed by knitting aramid 1313 fibers and an inner layer formed by blending cotton fibers and acrylic fibers according to a ratio of 2: 1; preparing a modified butyronitrile latex coating, and immersing the double-layer knitted glove into the modified latex slurry to form a compact coating; nano silicon dioxide coatings are additionally arranged on easy-to-wear parts such as fingertips of the glove through a secondary dipping process; by innovating a material system and structural design, multi-dimensional improvement of electric arc prevention, insulation and wear resistance of the glove is realized; through a four-stage protection mechanism of balancing an electric field through the conductive grid, resisting ablation of the aramid fiber outer layer, dissipating energy through the latex coating and resisting wear and strengthening of the nano inner layer, excellent arc-proof performance and insulating performance are achieved, and the wear-resistant service life is prolonged.

The application relates to the technical field of lenses, in particular to a high-temperature-resistant lens and a preparation method thereof. The high-temperature-resistant lens comprises a lens base body and high-temperature-resistant coating layers coated on two sides of the lens base body, the high-temperature-resistant coating layers are coated by high-temperature-resistant coating liquid, and the high-temperature-resistant coating liquid comprises the following components: 100-200 parts of deionized water, 45-60 parts of methyl triethoxysilane, 15-30 parts of isopropyl alcohol, 15-60 parts of ethyl orthosilicate and 20-60 parts of silica sol. Inorganic silica coating layers formed by the combination of ethyl orthosilicate and silica sol are selected for surface modification treatment, due to the effective coating of the silicon film, inorganic coating layers can be formed at two ends of the lens, the inorganic coating layer structure can well resist high-temperature, high-humidity and high-heat environments, and therefore the high-temperature-resistant performance of the lens is improved.

The invention discloses high-speed dispersion equipment for nano silicon dioxide coating processing, and belongs to the technical field of coating processing equipment. The stirring mechanism is arranged below the driving mechanism and comprises a middle stirring assembly and a bottom stirring assembly, the middle stirring assembly comprises an inner packing auger and an outer packing auger, the outer packing auger is arranged outside the inner packing auger in a sleeving mode, and the driving mechanism is used for driving the inner packing auger and the outer packing auger to do reciprocating rotation in opposite directions; the bottom stirring assembly comprises a plurality of stirring blades, and the driving mechanism is also used for driving the plurality of stirring blades to rotate and perform planetary rotation at the same time; the bubble removing mechanism is arranged below the driving mechanism, and the bubble removing mechanism is used for collecting and breaking bubbles on the liquid surface of the coating; through the overall structure arrangement, the paint dispersing effect is improved, and meanwhile bubbles generated in the dispersing process are eliminated.

The invention discloses a composite super-hydrophobic coating material as well as a preparation method and application thereof, and belongs to the technical field of cultural relic protection. The composite super-hydrophobic coating material disclosed by the invention is composed of a benzotriazole-acrylic resin-fluorinated silicon dioxide composite super-hydrophobic coating; the benzotriazole-acrylic resin-fluorinated silicon dioxide composite super-hydrophobic coating comprises a benzotriazole coating, an acrylic resin coating and a fluorinated silicon dioxide coating which are sequentially assembled from the surface of a metal cultural relic, the fluorinated silicon dioxide coating is prepared by carrying out hydrolytic condensation on tetraethoxysilane by a sol-gel method. The composite super-hydrophobic coating based on benzotriazole-acrylic resin-fluorinated silicon dioxide is used for protecting metal cultural relics, the metal cultural relics are endowed with corrosion resistance to corrosive solutions and gases, and the coating does not cause surface color change. The method provided by the invention is used for solving the problems of poor performance, poor transparency and the like of the existing metal cultural relic anti-corrosion material.

The present application belongs to the technical field of hydrogel dressings, and particularly relates to a wet compress gel and application thereof. The wet compress gel comprises a functional component and a gel component; the functional component comprises composite silica gel balls, aluminum hydroxide, calcium carbonate and magnesium carbonate; the wet compress gel is packed in a breathable outer layer of a package to obtain a wet compress gel bag. In use, the wet compress gel bag can be heated by a microwave oven or hot water to apply heat to human skin, and the mineral beneficial factors can be released to the human body through the silica coating of deep-sea mud and shell powder; the obtained wet compress gel bag has excellent cold storage and heat storage performance, and the gel material has stable performance and better durability, and still has good cold storage and heat storage performance after multiple uses; the wet compress gel bag gel of the present application combines beneficial minerals and colloids, so that the gel has a Q elastic feel, and solves the common poor feel problem of cold and hot compress gels on the market which have strong flowability or weak resilience.

The application discloses a preparation method of an aluminum substrate IH applicable electric appliance inner pot, which comprises the following steps: S1, stamping forming an aluminum pot body structure and carrying out surface pretreatment; S2, mixing three kinds of different formula silica coating powder mixtures to realize the continuous spraying of a gradient distribution magnetic conductive layer from the bottom center to the upper part of the pot wall along the outer surface of the pot body by a cold spraying process; S3, placing in a protective atmosphere to carry out a first annealing treatment; S4, depositing a layer of ceramic coating easy-to-clean protective layer on the magnetic conductive layer of the outer surface of the pot body; S5, placing in a protective atmosphere again to carry out a second annealing treatment, so as to obtain the aluminum substrate IH applicable electric appliance inner pot. The preparation method realizes the performance optimization of the inner pot in different areas, improves the heating efficiency and uniformity, enhances the wear resistance and easy-to-clean property of the coating, and can meet the comprehensive demand of modern kitchen appliances on high-performance inner pots.

The invention provides an IC soaking sheet surface micro-texture forming method and device, and relates to the field of electronic equipment manufacturing. According to the method, aluminum alloy is put into a stamping die to be subjected to stamping forming, and a workpiece with a micro-texture on one face is obtained; the workpiece is transferred to a PVD cavity, vacuumizing is conducted, inert gas is introduced, a sputtering power source is turned on, and a titanium oxide coating and a PTFE-silicon dioxide coating are sequentially sputtered and deposited on the face, with the microstructure, of the workpiece; and turning off a sputtering power supply, and blanking to obtain the IC soaking sheet. Wherein the aluminum alloy comprises the following components in percentage by weight: 2%-3% of Si, 0.2%-0.4% of Cu, 0.05%-0.1% of Ti, 0.1%-0.5% of B, 0.03%-0.08% of Sc, 0.02%-0.05% of Sr, less than 0.1% of inevitable impurities and the balance of aluminum. The prepared IC soaking sheet is good in heat conduction performance, heat transfer can be accelerated, the heat dissipation effect is enhanced, the bonding force between the sputtering functional coating and the aluminum alloy workpiece is high, and stability is good.

The invention belongs to the technical field of touch screens, and particularly relates to a touch screen with a scratch-resistant coating. The touch screen is high in sensitivity, the coating prepared through hybridization of the organic silicon emulsion and the inorganic silica sol can form nanoscale honeycomb-shaped pores, the problem that a pure inorganic silicon dioxide coating is prone to cracking can be solved, the inorganic silica sol forms cross-linked silicon dioxide particles in the curing process, and when the surface of the touch screen is scratched, the surface of the touch screen is not prone to cracking. The particles can support each other, so that the surface hardness and the scratch resistance are improved; according to the glass substrate, alkali metal is replaced with boron oxide, the melting processing performance of glass is improved during glass melting, the problem of screen failure caused by rapid diffusion of alkali metal cations in the glass after the alkali metal is added is solved, the prepared glass substrate has excellent hardness due to high-content aluminum oxide, and the service life of the glass substrate is prolonged. Through zirconium dioxide, the hardness, wear resistance and chemical corrosion resistance of the glass are further improved, the impact resistance of the substrate is enhanced, and the service life of the touch screen is prolonged.

To provide composite coated soft magnetic metal powder in which the insulating property of a green compact is excellent without causing the reduction of magnetic permeability by combining a silicon oxide coating layer and a coating layer of a silicon compound containing an organic substance, and to provide a method for producing the same.SOLUTION: By forming a composite coating in which a silicon oxide coating layer having an average film thickness of 0.1 nm or more and 20 nm or less is provided as a first layer and a silicon-containing coating layer having a structure in which a linear alkyl group having 8 or more and 20 or less carbon atoms is bonded by a siloxane bond is provided as a second layer on the surfaces of soft magnetic metal particles containing 20 mass% or more of iron, it is possible to obtain a composite-coated soft magnetic metal powder having excellent insulating properties of a green compact without decreasing the permeability.SELECTED DRAWING: None

This invention belongs to the field of ablation-resistant thermal insulation composite material preparation technology, specifically relating to a polyacrylonitrile-based hollow carbon fiber for thermal protection materials and its preparation method. The invention first pre-oxidizes porous polyacrylonitrile precursor fibers to obtain porous pre-oxidized fibers. Then, phenolic resin is coated onto the surface of the pre-oxidized fibers through solution polymerization. After impregnation in an organosilicon source solution, rapid Joule heating at high temperature deposits both phenolic carbon microspheres with excellent ablation resistance and a silica coating on the fiber surface, forming a unique hollow carbon fiber structure with excellent thermal insulation properties. This solves the problem that polyacrylonitrile-based carbon fibers cannot simultaneously achieve both thermal insulation and ablation resistance. The thermal conductivity of the polyacrylonitrile-based hollow carbon fiber prepared by this method is about 17% lower than that of porous polyacrylonitrile carbon fibers prepared by traditional carbonization methods, making it applicable to the field of integrated ablation-resistant thermal protection materials.

The application discloses a processing technology of an aluminum-based multi-phase composite toughening reinforcing guide rail for a sunroof of a new energy vehicle, and comprises the following steps: S1, nano-aluminum nitride pretreatment; S2, nano-aluminum nitride surface coating; S3, preparation of a silica coating layer; S4, nano-aluminum nitride composite modification; S5, smelting of an aluminum alloy; S6, stainless steel fiber addition and casting; S7, homogenization treatment; and S8, subsequent treatment. The continuous skeleton structure formed by the stainless steel fiber can disperse local stress concentration and avoid local plastic deformation when force is applied. The nano-aluminum nitride@silica-silane particle is dispersedly distributed between the aluminum alloy matrix and the fiber gap, hinders dislocation movement through dispersion strengthening, and reduces fatigue crack initiation sites. Under the synergistic action of the two, the tensile strength and impact toughness of the material are greatly improved, and the guide rail is suitable for use of a large sunroof.

The invention relates to the technical field of electrochemical energy storage, in particular to an aqueous zinc ion battery negative electrode material with an amino group coating as well as a preparation method and application of the aqueous zinc ion battery negative electrode material. The preparation method comprises the following steps: adding aminated silicon dioxide and a binder into an agate mortar, and grinding to obtain mixed powder of the aminated silicon dioxide and the binder; and then transferring the mixed powder of the aminated silicon dioxide and the binder into a stirring container, then adding an organic solvent, stirring and mixing to obtain aminated silicon dioxide coating slurry, then coating the aminated silicon dioxide coating slurry on a zinc negative electrode in a blade coating manner, and drying to obtain the aminated silicon dioxide coating. The aqueous zinc ion battery negative electrode material with the amino group coating prepared by the invention can promote efficient transmission of zinc ions, reduce concentration polarization, guide uniform deposition of the zinc ions, avoid zinc dendritic crystal growth caused by overhigh local concentration, improve the capacity and coulombic efficiency of a total battery, and improve the service life of the battery. The commercialization of the water-based zinc ion battery is favorably realized.

The application belongs to the technical field of concrete materials, and particularly relates to asphalt concrete filler, asphalt concrete and a preparation method thereof. The asphalt concrete filler comprises the following raw materials in parts by weight: limestone powder 30-40 parts, slaked lime 5-15 parts, coated modified fly ash melting solidification body powder 40-100 parts and dispersing agent 0.1-0.3 parts. In the modification process of the fly ash melting solidification body powder, a continuous and dense nano-silica coating layer is formed on the surface of the powder particles by surface chemical modification, and the coating layer realizes long-term stability of the alkaline powder by multiple mechanisms, thereby ensuring stable bonding performance with asphalt. The application further provides asphalt concrete comprising the following raw materials: coarse aggregate, fine aggregate, asphalt concrete filler and asphalt. The asphalt concrete filler and asphalt provided by the application solve the problem of resource utilization of fly ash melting solidification body waste, and have a broad market application prospect.

The invention provides a bismuth oxychloride-coated glass flake composite material as well as a preparation method and application thereof, and belongs to the technical field of inorganic functional materials. The method comprises the following steps: adding a silicon source into a glass flake suspension under an alkaline condition to form a silicon dioxide coating layer on the surface of the glass flake; and under an acidic condition, continuing to add a bismuth salt solution for in-situ deposition to obtain the glass flake composite material coated with bismuth oxychloride. According to the preparation method, a silicon source forms a silicon dioxide coating layer on the surface of the glass flake under an alkaline condition, and then bismuth ions and chloride ions are subjected to in-situ deposition under an acidic condition to form a bismuth chloride oxide coating layer, so that bismuth chloride oxide is prevented from being agglomerated during use.

A chemical mechanical polishing composition comprises, consists of, or consists essentially of an aqueous based liquid carrier and silica coated ceria particles in the liquid carrier. The silica coated ceria particles include a silica coating over a ceria core and an aminosilane compound covalently bonded to an external surface of the silica coating such that the silica coated ceria particles have a positive charge in the polishing composition. The pH of the composition is less than about 7.

The utility model relates to the related field of car clothing, in particular to a degradable environment-friendly car clothing with a biodegradable enzyme catalytic coating, which comprises a car clothing body, a nano-silver coating, the biodegradable enzyme catalytic coating, a silicon dioxide coating, an antifouling layer, silicon dioxide particles, an adhesive layer, a release film and the like. By arranging the biodegradable enzyme catalytic coating, the degradation speed of the waste car cover can be increased, the environment pollution caused by the waste car cover is reduced, the car cover is more environment-friendly, by arranging the silicon dioxide coating, the scratch resistance of the car cover is improved, the situation that the car cover is scratched due to external acting force is reduced, and the service life of the car cover is prolonged. The service life of the car cover can be prolonged, stain attachment can be effectively reduced through the arranged antifouling layer, and the attractiveness of the car cover can be improved.

The utility model discloses an anti-fog polarized lens which comprises a PVA (Polyvinyl Alcohol) polarized film, and nanoscale pits are formed on the surface of the PVA polarized film through ion beam etching; the resin base material is cured and molded on the upper surface and the lower surface of the PVA polarizing film; the hardening layer is coated on the surface of the resin base material; the high anti-reflection layer is plated on the surface of the hardening layer; the multi-layer anti-fog protection layer is arranged on the surface of the high anti-reflection layer and sequentially comprises a silane coupling agent bottom layer, a nano silicon dioxide coating, a wear-resistant layer and a hydrophobic outer layer. According to the utility model, the nanoscale pits are etched and formed on the surface of the PVA polarizing film, so that the interface bonding capacity with resin is enhanced; in addition, the multiple anti-fog protective layers depend on the silane coupling agent bottom layer to enhance the adhesive force between the coating and the resin substrate, the nano-silica coating is nano-silica suspension liquid and is matched with the hydrophobic outer layer to improve the waterproof effect of the lens, and the middle wear-resistant layer enhances the wear resistance of the nano-silica coating film layer and improves the durability.

The invention discloses a cement-based composite material with a gradient modulus transition interface layer and a preparation method of the cement-based composite material, and belongs to the field of high-performance cement-based composite materials and interface engineering. According to the material, a silicon dioxide coating and an organic monomer deposition polymerization layer are sequentially constructed on the surface of aggregate to form a composite interface layer with modulus continuous gradient change, so that smooth stress transition from high-modulus aggregate to a low-modulus cement matrix is realized. The method comprises the following steps: firstly, pretreating and activating aggregate, and then coating the surface of the aggregate with a silicon dioxide sol layer by adopting a sol-gel method; introducing a polymerizable organic monomer on the sol layer through a controllable deposition process; and finally, a modulus cascade structure of aggregate-silicon dioxide layer-organic layer-cement matrix is formed. The structure can effectively weaken interface stress singularity, inhibit microcrack initiation and improve the mechanical property of the composite material in a high ground stress environment. The method is suitable for harsh engineering environments such as tunnel linings, high dams and nuclear power facilities.