297 results about "Orthosilicate" patented technology

This case involves a wastewater decolorizer and its preparation method. First, natural attapulgite is pretreated with acid and alkali; then, tetraethyl orthosilicate and aluminum nitrate are added, and silicon dioxide and aluminum oxide are loaded on its surface by hydrolysis and impregnation; silane coupling agent KH570 is added to obtain modified attapulgite; acrylamide is reacted with dicyandiamide and formaldehyde to obtain a dicyandiamide formaldehyde prepolymer containing a carbon-carbon double bond; and the dicyandiamide formaldehyde prepolymer containing a carbon-carbon double bond is polymerized in situ on the surface of the modified attapulgite. The present invention provides a decolorizer for industrial wastewater, which has high stability and can be used in combination with commercially available flocculants to effectively remove COD from water bodies. At the same time, at a relatively low addition amount, it can quickly decolorize industrial wastewater, thereby improving water treatment efficiency and reducing costs.

The invention relates to the technical field of self-healing agents, in particular to a well cementation cement slurry self-healing agent and a preparation method thereof. The modified polyethylene glycol terephthalate polymer comprises the following components in parts by weight: 30-50 parts of modified polyethylene glycol terephthalate polymer, 2-10 parts of metal oxide, 5-15 parts of lithium silicate, 0.5-2 parts of persulfate, 0.1-1 part of bacillus subtilis and 1-5 parts of calcium lactate. The isosorbide can react with ester bonds in polyethylene glycol terephthalate, so that more hydroxyl groups are introduced, and the hydroxyl groups can interact with cement hydration products or metal oxides and lithium silicate to promote formation of new mineral phases at cracks. The generation of the new mineral phase is beneficial to filling and repairing cracks, and the self-healing of the cement paste is realized, so that the long-term stability of a well cementation structure is improved. Tetraethyl orthosilicate can cooperate with other components such as the modified polyethylene glycol terephthalate polymer to jointly promote the self-healing process of set cement.

The invention discloses compression-resistant glass and a preparation method thereof, and relates to the technical field of special glass. When the compression-resistant glass is prepared, an anorthite crystal phase is used as a main material, a wollastonite crystal phase is used as an auxiliary material, and zinc, barium, boron, sodium, antimony and titanium elements are added, so that the compression-resistant glass ceramic is prepared; the preparation method comprises the following steps: mixing tetraethoxysilane, zirconium oxychloride octahydrate and 3-glycidyl ether oxypropyl trimethoxy silane, adding hydrochloric acid, and stirring to obtain modified sol; the preparation method comprises the following steps: mixing hydroxyl-terminated polysiloxane, trimethyl ethyoxyl silane, methyl triethyoxyl silane and octadecyl triethyoxyl silane, adding a hydrochloric acid solution, and reacting to prepare an organosilane modified solution; mixing the modified sol and the organosilane modified solution, coating the surface of the compression-resistant microcrystalline glass with the mixture, and curing to obtain the compression-resistant glass. The compressive glass prepared by the invention has the advantages of high compressive strength, hydrophobicity, wear resistance and high surface hardness.

The invention provides a preparation method and application of a zinc negative electrode with an MCM-41 protective layer, and relates to the field of electrochemical energy storage materials. The preparation method comprises the following steps: firstly, heating and stirring hexadecyl trimethyl ammonium bromide, sodium hydroxide and deionized water for 1.5 hours, then adding tetraethoxysilane, heating and stirring for 2 hours to obtain a mixed solution, aging the obtained mixed solution in an air atmosphere for 15 hours, centrifugally washing, drying, putting into a porcelain boat, heating to 550 DEG C at a constant speed, calcining for 4 hours, and naturally cooling to obtain MCM-41 powder. And grinding and mixing the obtained MCM-41 powder and polyvinylidene fluoride, dropwise adding N-methyl pyrrolidone, stirring to prepare slurry, uniformly coating the surface of a zinc metal negative electrode with the obtained slurry through a scraper, and carrying out vacuum drying to obtain the zinc negative electrode with the MCM-41 protective layer. The MCM-41 material is used as a zinc negative electrode protection layer to inhibit the growth and corrosion passivation of metal zinc negative electrode dendrites in the charging and discharging process of a zinc ion battery, so that the cycling stability and the electrochemical performance of the battery are greatly improved.

The invention belongs to the technical field of building materials, and particularly relates to a building thermal insulation aerogel material and a preparation method, the aerogel material comprises the following components by mass: 25-35 parts of a silicon source, 40-80 parts of a solvent, 0.3-0.6 part of a catalyst, 4-13 parts of an aluminum source, 9-20 parts of reinforcing fibers, 4-10 parts of a modifier, and 20-40 parts of carrier fibers; the silicon source is ethyl orthosilicate or methyl trimethoxy silane; the solvent is absolute ethyl alcohol; the catalyst is hydrochloric acid or ammonia water; the aluminum source is aluminum nitrate nonahydrate or aluminum isopropoxide; the reinforced fibers are nano titanium dioxide fibers; the modifying agent is gamma-aminopropyl triethoxy silane or gamma-methacryloyloxy propyl trimethoxy silane, and the modifying agent is gamma-aminopropyl triethoxy silane or gamma-methacryloyloxy propyl trimethoxy silane; the carrier fiber is rock wool or mineral wool. According to the invention, the thermal insulation aerogel material for buildings, which is high in mechanical strength, good in weather resistance and excellent in thermal insulation performance, can be prepared, so that the requirements of the building industry on high-performance thermal insulation materials can be met.

The invention relates to a continuous production method of high-purity tetraethoxysilane, and belongs to the technical field of tetraethoxysilane preparation. The method comprises a raw material pretreatment stage and a purification and rectification stage: in the pretreatment stage, silicon tetrachloride and ethanol are subjected to an esterification reaction in a molar ratio of 1: (3-4) under the protection of nitrogen, the pH is adjusted to be neutral through triethylamine, and triethylamine hydrochloride is removed through reduced pressure distillation; then, a cerium oxide-molecular sieve composite adsorbent with the specific surface area larger than or equal to 800 m / g and the pore diameter of 2-5 nm is adopted for dehydration under the pressure of 0.8-1.2 MPa till the water content is smaller than or equal to 5 ppm, and volatile impurities are removed through high-purity nitrogen purging; in the purification stage, metal ions and Cl are synergistically removed through a titanate modified resin layer and a nano TiOtube layer, and then step-by-step separation is performed through a four-stage differential pressure rectifying tower. Through collaborative optimization of structural design of the composite adsorbent, construction of an organic-inorganic hybrid interface of the resin layer and pressure gradient rectification, 72-hour continuous production is achieved, the single-pass yield of the product is 92%, and the total amount of metal impurities is smaller than or equal to 5 ppb.

The invention relates to the technical field of electronic polishing materials, in particular to a preparation method of agglomerated diamond, which comprises the following steps: firstly, etching diamond micro-powder through nickel powder, and then respectively carrying out surface treatment on the diamond micro-powder through tetraethoxysilane and zinc nitrate; the preparation method comprises the following steps: preparing silanized diamond micro-powder with a silicon dioxide coating adsorbed on the surface and coated diamond micro-powder with zinc oxide coated on the surface, adding the silanized diamond micro-powder and the coated diamond micro-powder into diamond micro-powder, and combining with a ceramic bond and polyvinyl alcohol to prepare agglomerated diamond; the wear resistance, the bonding strength and the oxidation resistance of the agglomerated diamond can be improved; the diamond micro-powder is etched through the nickel powder, microstructure changes or defects can be introduced to the surface of the diamond micro-powder, a subsequent surface treating agent can be better attached to the diamond micro-powder, the surface area of the diamond micro-powder can be increased through etching treatment, and therefore the binding capacity of the etched diamond micro-powder and other substances is improved.

The invention relates to the technical field of nano material production, in particular to a preparation method of a core-ring confinement structure aqueous zinc ion battery positive electrode material, which comprises the following steps: by taking resorcinol and formaldehyde as carbon sources and tetraethoxysilane as a silicon source, forming hollow mesoporous carbon nanospheres by magnetic stirring, calcining and etching methods; and obtaining the water-based zinc ion battery positive electrode material with the nuclear ring confinement structure through vacuum degassing and a hydrothermal method. Wherein the three-dimensional nano hollow mesoporous carbon nanospheres show very high specific surface area, uniform porosity and good conductivity, and are beneficial to rapid transportation of zinc ions and electrons; the core-ring structure VS2 in the carbon sphere can prevent the structure from falling off in the charge-discharge process, the internal space can buffer the volume effect in the embedding / dezincification process, and the stability of the structure in the cycle process is facilitated, so that the material has good rate capability and cycle stability, and has a wide application prospect.

A magnetic nanoparticle composite microcapsule, and a preparation method therefor and the use thereof. The preparation method comprises: diluting concentrated ammonia water with absolute ethanol in which nano-Fe3O4 is dispersed, stirring same and adding ethyl orthosilicate, centrifuging same, and then performing washing to obtain Fe3O4 / SiO2 particles; dispersing same in anhydrous ethanol, then adding isopropanol containing tetrabutyl titanate, and performing a treatment to obtain Fe3O4 / SiO2 / TiO2 nanoparticles; adding polyurethane TDI prepolymer to the Fe3O4 / SiO2 / TiO2 nanoparticles, adding same to a core material, then dripping an emulsifier, and stirring same to obtain a core material emulsion; and heating same in a water bath, dropwise adding butanediol, and performing heating, stirring and vacuum filtration to obtain a magnetic nanoparticle composite microcapsule. By means of the loading with a core material having a repair function, the prepared magnetic microcapsule can actively repair damage to an insulating material caused by electrical and mechanical stress, thereby improving the reliability of a device.

The invention discloses an iron-based layered silicate material for efficiently removing variable-valence heavy metals and water treatment application of the iron-based layered silicate material, and belongs to the technical field of water treatment.The preparation method of iron-containing layered silicate minerals comprises the following steps that ferrous sulfate heptahydrate is dissolved in water, sodium dithionite and sodium orthosilicate are sequentially added, stirring is conducted, and a mixture is obtained; stirring, homogenizing and aging for two hours; the hydrothermal reaction kettle is used for reacting in a high-temperature and high-pressure environment; according to the iron-containing layered silicate mineral material, a unique layered structure similar to natural iron-containing layered silicate minerals and high adsorption performance are reserved, variable-valence heavy metal arsenic in a wastewater solution is synergistically and efficiently removed by means of the oxidation-reduction activity of the iron-containing layered silicate mineral material and induction of generation of Fenton-like reaction, and the iron-containing layered silicate mineral material is obtained. The method disclosed by the invention shows high treatment efficiency, environmental friendliness and remarkable economic benefits, and is expected to exert remarkable environmental benefits in the field of water treatment.

The invention relates to a preparation method and application of a wall coating type enzyme-loaded microchannel reactor. The method comprises the following steps: mixing tetramethyl orthosilicate, methyltrimethoxysilane and methanol to obtain a solution A; deionized water, polyethylene glycol, a sodium fluoride aqueous solution and a dialyzed lipase solution are mixed to obtain a solution B, the solution B and the solution B are mixed for 3-10 minutes in an ice bath environment to obtain a solution C, the solution C is introduced into the pretreated microchannel through an injection pump, after incubation is conducted for 10-60 minutes, nitrogen is adopted for purging, redundant sol-gel is removed, and then the solution C is put into a drying oven to be dried; the catalyst is used for hydrolysis reaction of grease and various ester exchange and esterification reactions. The method can be carried out in a mild environment, and has higher conversion rate and shorter reaction time.

The invention relates to an adsorbent for nitrogen production and a preparation method thereof, and belongs to the technical field of air nitrogen production. The technical problem to be solved by the invention is to provide a low-cost preparation method of the adsorbent for nitrogen production, and a carbon molecular sieve is modified by orthosilicate, so that the adsorbent has a very good adsorption effect. The method comprises the following steps: a, mixing and molding: mixing orthosilicate and phenolic resin, and extruding and molding into particles; and b, carbonizing: heating the particles obtained in the step a to 700-1000 DEG C under a protective atmosphere, and carbonizing to obtain the adsorbent for nitrogen production. The adsorbent for nitrogen production is prepared by mixing the orthosilicate and the phenolic resin, the method is simple, oxygen can be well adsorbed, nitrogen and oxygen can be well separated, the adsorbent can be used for preparing nitrogen through pressure swing adsorption, and the nitrogen production efficiency is high.

The invention belongs to the technical field of concrete admixtures, and particularly relates to a new and old concrete dry powder heat-resistant interface treating agent and application. The interface treating agent is prepared from the following raw materials in parts by weight: 100 parts of cement, 100 to 125 parts of quartz sand, 20 to 30 parts of mineral admixture, 5 to 8 parts of organic-inorganic hybrid phase change microcapsules, 1.5 to 3 parts of carboxymethyl chitosan powder, 0.1 to 0.2 part of early strength agent and 0.05 to 0.1 part of water reducing agent, the preparation method of the organic-inorganic hybrid phase change microcapsule comprises the following steps: preparing a precursor solution from alkyl orthosilicate, an ether-containing silane coupling agent, alcohol, water and ammonia water; preparing an emulsion from paraffin, a surfactant and water; under the conditions of temperature control and stirring, the precursor solution is dropped into the emulsion for reaction, and the organic-inorganic hybrid phase change microcapsule is obtained. The organic-inorganic hybrid phase change microcapsule can adjust the temperature, delay the sudden rise of the temperature at the interface, reduce the peak temperature, reduce the temperature difference, buffer the thermal expansion and cold contraction, and reduce the cracking caused by thermal stress.

The invention belongs to the technical field of artificial crystals and radiation detection, and relates to a method for improving the performance of a rare earth orthosilicate scintillation crystal. The method for improving the performance of the rare earth orthosilicate scintillation crystal comprises the following steps: carrying out corrosion, plasma injection and annealing diffusion on the rare earth orthosilicate scintillation crystal, and finally realizing the improvement of the performance of the rare earth orthosilicate scintillation crystal.

The invention provides an electrochemical device and an electronic device.The electrochemical device comprises a positive pole piece, the positive pole piece comprises a positive current collector, a first coating and a positive material layer, the first coating is arranged on the surface of the positive current collector, and the positive material layer is arranged on the surface, away from the positive current collector, of the first coating; the first coating comprises a first main material and a first binder, the first main material comprises a lithium supplementing material, and the lithium supplementing material comprises at least one of lithium iron phosphate, lithium iron manganese phosphate, lithium orthosilicate or lithium ferrite; the infrared spectrum of the first coating has a characteristic peak between 3200 cm <-1 > and 3400 cm <-1 >. The electrochemical device provided by the invention can give consideration to the safety performance, the capacity and the volume energy density of the cotter pin.

The invention discloses a composite fluorine removal agent and a preparation method thereof, and belongs to the technical field of water treatment. The preparation method of the composite fluorine removal agent comprises the following steps: dipping biomass charcoal in a lanthanum-containing solution, and calcining to obtain a La2O3 / charcoal carrier; the La2O3 / carbon carrier, nano-hydroxyapatite, MgO and magnetic Fe3O4 particles are mixed and then subjected to heat treatment, and a composite material is obtained; mixing the composite material, tetraethoxysilane and a solvent, dropwise adding ammonia water into the mixture for catalytic hydrolysis, and then annealing to obtain a SiO2-coated composite material; and mixing and granulating the SiO2 coated composite material and a binder, and then activating to obtain the composite fluorine removal agent. The method realizes the preparation of the composite fluorine removal agent which is wide in pH application range, can be recycled and can be suitable for efficient treatment of low-concentration fluorine wastewater.

The invention belongs to the technical field of synthesis of medium-chain glyceride, and particularly relates to a rhenium-loaded nano flaky pure silicon S-1 zeolite catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking tetraethoxysilane as a silicon source, tetrapropylammonium hydroxide as a template agent and ammonia water and glucose as growth regulators, preparing by adopting a hydrothermal synthesis method, and drying and calcining to prepare a nano flaky pure silicon S-1 zeolite carrier; ammonium perrhenate is used as a rhenium source to prepare a rhenium precursor solution, the nanosheet-shaped pure silicon S-1 zeolite carrier is subjected to equivalent-volume impregnation, and the rhenium-loaded nanosheet-shaped pure silicon S-1 zeolite catalyst is obtained through aging, drying and calcination. The high-performance solid catalyst containing metal active sites on the surface is prepared, is applied to the esterification reaction of caprylic acid and glyceride to produce medium-chain glyceride, and has higher catalytic esterification activity.

The invention provides a dark metal modified lithium orthosilicate-based thermochemical heat storage material as well as a preparation method and application thereof, and belongs to the technical field of energy and material science. The components of the heat storage material comprise lithium orthosilicate and dark metal, the proportion of the dark metal in the heat storage material is 2-10 mol%, and the source of the dark metal comprises one or more of manganese dioxide, ferric oxide, nickel oxide and copper oxide. Metal ions introduced into the obtained dark metal modified lithium orthosilicate-based thermochemical heat storage material have the effects of promoting the ion migration rate and resisting material sintering, and specifically, the heat storage density and the cycling stability of the material are remarkably enhanced. In addition, due to the introduction of the dark metal oxide, the color of the heat storage material is remarkably deepened, the solar spectrum absorptivity is greatly improved, the light absorption performance of the material is greatly enhanced, and the heat storage material has higher photo-thermal conversion efficiency and is more suitable for a concentrating solar energy storage system.

The invention discloses a low-carbon cementing material for coal mine paste filling, and belongs to the technical field of coal mine filling. The invention discloses a low-carbon cementing material for coal mine paste filling. The low-carbon cementing material comprises the following raw materials in parts by mass: 200-240 parts of furnace slag, 50-80 parts of carbide slag, 40-65 parts of desulfurized gypsum, 330-360 parts of fly ash, 10-20 parts of an active activator and 5-10 parts of a coagulant, wherein the active exciting agent is a mixed compound of sodium aluminate and sodium orthosilicate; the coagulant is a mixed compound of sodium thiocyanate and anhydrous calcium chloride. The cementing material adopts all solid waste raw materials, can be used for preparing a coal mine paste filling material, can reduce the filling cost of coal mining, improves the working efficiency of coal mining, and is beneficial to promoting the healthy and sustainable development of coal mine enterprises.

The invention relates to the technical field of ceramic antifouling agents, and mainly relates to a high-hardness wear-resistant matte ceramic antifouling agent and a preparation method thereof. The high-hardness wear-resistant matte ceramic antifouling agent is prepared from the following raw materials in parts by weight: 50 to 60 parts of waterborne acrylic resin, 3 to 5 parts of tetraethoxysilane, 0.5 to 1.5 parts of citric acid, 0.1 to 0.5 part of a catalyst, 0.5 to 3 parts of fluorine-containing acrylate, 1 to 10 parts of polymethyl methacrylate microspheres, 20 to 30 parts of water, 1 to 5 parts of titanium dioxide sol and 1 to 5 parts of organic silicon modified polyvinyl alcohol. The organic silicon modified polyvinyl alcohol is obtained by carrying out modification treatment on polyvinyl alcohol by using KH-570. The high-hardness wear-resistant matte ceramic antifouling agent provided by the invention can be used for carrying out good antifouling treatment on the ceramic surface and enhancing the wear resistance.

The invention belongs to the technical field of rock wool thermal insulation materials, and particularly relates to a high-strength thermal insulation rock wool board and a preparation method thereof. The high-strength thermal insulation rock wool board is prepared from the following raw materials in parts by weight: 65 to 72 parts of basalt, 10 to 15 parts of dolomite, 8 to 12 parts of iron ore, 3 to 8 parts of bauxite, 2 to 5 parts of limestone, 10 to 15 parts of aerogel powder and 4 to 7 parts of binder. The aerogel powder is prepared by the following preparation processes: mixing tetraethoxysilane, ethanol and water, adjusting the pH value to 2.5-4, and stirring under a heating condition to obtain silicon dioxide sol; the preparation method comprises the following steps: dispersing black phosphorene in water to obtain black phosphorene dispersion liquid; and mixing a black phosphorene dispersion liquid with the silicon dioxide sol to form a mixed solution, adjusting the pH value of the mixed solution to 8-10, standing, aging, freeze-drying and grinding to obtain the aerogel powder. The high-strength heat-preservation rock wool board has the advantages of low heat conductivity, low water absorption and excellent mechanical strength.

The invention discloses a three-dimensional porous hard carbon coated silicate positive electrode material and a preparation method thereof, belongs to the field of novel energy materials, and relates to a three-dimensional porous hard carbon coated silicate positive electrode material and a preparation method thereof. The preparation method comprises the following steps: taking carbon nanotubes and chitosan as a carbon skeleton, mixing in an acidic solution, adding ethyl orthosilicate into ethanol, adding corresponding metal ion salts, dissolving and mixing, carrying out two-stage calcination at a certain temperature to obtain a three-dimensional porous hard carbon coated silicate positive electrode material, pulping the obtained material, coating a foil material with the pulped material, and drying to obtain the three-dimensional porous hard carbon coated silicate positive electrode material. And finally assembling to obtain the battery. The prepared silicate positive electrode material has good conductivity and discharge stability.

The present application provides a method for preparing a perfluoropolyether oil-based cobalt-boron magnetic fluid, which is applied to the technical field of magnetic fluids. The present application synthesizes cobalt boride Co-B magnetic powder by reacting aqueous bis(2-ethylhexyl) succinate sulfonate, sodium bis(2-ethylhexyl) succinate sulfonate and sodium borohydride in an isooctane solution, and then coats the surface of the cobalt boride powder with silica by hydrolysis of ethyl orthosilicate. Perfluoropolyether acyl fluoride is grafted onto the surface of the silica-coated cobalt boride magnetic powder by an amide reaction to improve the compatibility between the cobalt boride magnetic powder and perfluoropolyether oil, thereby preparing a thermodynamically stable perfluoropolyether oil-based Co-B magnetic fluid.

The application provides a modified hollow porous silica microsphere and a preparation method and application thereof. The preparation method of the modified hollow porous silica microsphere comprises the following steps: S1, mixing a pre-hydrolysis solution of orthosilicate, a pre-hydrolysis solution of alkyl trialkoxysilane, a pre-hydrolysis solution of 1,2-bis(trialkoxysilyl)ethane and a polyol to obtain a mixture, refluxing, removing alcohol and obtaining a prepolymer; S2, mixing the prepolymer obtained in the step S1 with water, emulsifying, adjusting pH to alkaline, aging, filtering and drying, and the modified hollow porous silica microsphere is obtained. The application uses 1,2-bis(trialkoxysilyl)ethane as one of main silicon sources, and uses the mode of pre-hydrolyzing different silanes separately and then mixing and condensing, so that the highly hydrolyzable and polymerizable silane is prevented from being highly hydrolyzed and polymerized and the non-hydrolyzable and polymerizable silane is prevented from being hydrolyzed and polymerized, the preparation process is simple, the raw material cost is low, the porous microspheres obtained have good morphology and high yield, the operation condition is mild, and the application is easy to industrialize.

The invention belongs to the technical field of fine powder materials, and particularly relates to an aluminum powder pigment with a three-layer coating structure and a preparation method of the aluminum powder pigment. The preparation method of the aluminum powder pigment comprises the following steps: adding pretreated aluminum powder into a solvent, carrying out ultrasonic treatment to form a suspension, dropwise adding tetraethoxysilane, adjusting the pH value, and carrying out a heating reaction to obtain inner-layer SiO2 coated aluminum powder; uniformly mixing epoxy resin and acetone, adding a silane coupling agent, the inner-layer SiO2 coated aluminum powder and a curing agent, and carrying out heating reaction to obtain silicon-resin double-layer coated aluminum powder; the silicon-resin double-layer coated aluminum powder is placed in an ALD reaction cavity, vacuumizing and heating are carried out, the constant temperature is maintained, SiCl4 is introduced firstly, then nitrogen is introduced for purging, water vapor is introduced, then nitrogen is introduced for purging again, the steps are repeated for 100-300 times, SiO2 is deposited layer by layer, cooling and drying are carried out, and the silicon-resin double-layer coated aluminum powder is obtained. And the defects of easy oxidation, interlayer stripping, single function and the like of the traditional aluminum powder pigment are overcome.

The invention relates to the technical field of electrode materials, in particular to a preparation method and application of a doped manganese precursor. Nickel acetate tetrahydrate and manganese acetate tetrahydrate are used as metal sources, 3, 3 ', 5, 5'-biphenyl tetracarboxylic acid is used as an organic ligand, butyl orthosilicate and [3-(trimethoxysilyl) propyl] succinic anhydride are used as doping agents, and a doped manganese precursor is constructed through a hydrothermal reaction. A battery prepared from the positive electrode material prepared from the doped manganese precursor has relatively high first discharge specific capacity, coulombic efficiency of 90% or above, excellent cycling stability and rate capability, and important application value.

The invention discloses a FeNi soft magnetic composite material based on tetrabutyl orthosilicate hydrolysis coating and a preparation method of the FeNi soft magnetic composite material. According to the method, through a controllable sol-gel process, tetrabutyl orthosilicate is hydrolyzed to generate SiO2 gel, then a uniform and ultrathin SiO2 gel layer is generated on the surface of FeNi powder in situ, and then heat treatment densification is performed to obtain the FeNi soft magnetic composite material coated with SiO2 in an insulation mode. The SiO2 insulating layer is firmly combined with the matrix metal powder, the thermal stability is good, high frequency and high resistivity are achieved, and meanwhile dilution of non-magnetic relative magnetic performance is reduced to a great extent. The final magnetic core is obtained through compression molding and annealing heat treatment, has the excellent characteristics of high effective magnetic conductivity and low high-frequency magnetic core loss, and is particularly suitable for various efficient and miniaturized power electronic devices in the MHz frequency band.

The present invention relates to an anti-fog self-cleaning glass based on a cellulose ether coating and a preparation method, and belongs to the technical field of glass coatings. The cellulose ether coating comprises, by weight, 100 parts of tetraethyl orthosilicate, 9-12 parts of an active crosslinking agent, 16-24 parts of a modified cellulose ether, 3.2-4.5 parts of nano-silicon dioxide, 0.4-0.5 parts of a leveling agent, and 0.2-0.3 parts of a defoaming agent; the modified cellulose ether uses hydroxypropyl methylcellulose as a raw material, is alkalized by sodium hydroxide, is substituted by an alkyl glycol and trifluoropropylmethyldichlorosilane, and is terminated with an alcohol hydroxyl group, that is, a fluorinated intermediate is obtained, and then the end hydroxyl group of the fluorinated intermediate is opened by epichlorohydrin, and then the ring is closed under the promotion of strongly alkaline potassium tert-butoxide, and epoxy modification is introduced into the end of the fluorinated intermediate, that is, an epoxy modifier is obtained, and the modified cellulose ether is uniformly enriched on the surface during the coating forming process to form a stable protective layer.

A rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes a rhombohedral zinc orthosilicate (Zn2SiO4) phase, a cubic zinc ferrite (ZnFe2O4) phase, and a hexagonal silicon dioxide (SiO2) phase. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material exhibits a morphology including spherical microscale particles with an average diameter ranging from 0.8 micrometer (μm) to 1.8 μm and irregular nanoscale aggregates with an average diameter ranging from 50 nanometer (nm) to 110 nm. The rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material has an adsorption capacity for basic fuchsin dye of greater than or equal to 140 milligrams per gram (mg / g). Furthermore, a method for producing the rhombohedral Zn2SiO4 / cubic ZnFe2O4 / hexagonal SiO2 / C nanocomposite material includes calcination of metal precursors.

The invention relates to a photovoltaic anti-reflective coating for offshore and a preparation method thereof, and belongs to the technical field of optical coatings. The coating comprises, by weight, 30-35 parts of ethyl orthosilicate, 8-14 parts of alkyl trimethoxysilane, 15-20 parts of alkyl diethoxysilane, 12-18 parts of anti-reflective aid, 10-15 parts of nano silicon dioxide, 1-1.3 parts of leveling agent, 10-15 parts of cosolvent, and 22-28 parts of deionized water; the anti-reflective aid is substituted by methyl vinyl dichlorosilane and tetrafluorobutanediol to form a fluorine-containing chain compound, i.e., an intermediate, and then by a double-bond click reaction of γ-mercaptopropyl triethoxysilane and a side chain of an intermediate molecule, an ethoxysilane structure modification is introduced into the side chain of the intermediate molecule, i.e., an anti-reflective aid is obtained, and the anti-reflective aid interacts with the nano silicon dioxide to reduce the reflectivity of the coating.