218 results about "Methyltrimethoxysilane" patented technology

The invention relates to a mildew-proof silicone sealant with high curing rate and high adhesive strength, and belongs to the technical field of adhesives. The anti-mildew coating is prepared from alpha, omega-dihydroxy polydimethylsiloxane, dimethyl silicone oil, fumed silica, phenoxy resin coated nano calcium carbonate, a modified hydroxypropyl-gamma-cyclodextrin loaded mildew preventive, dibutyltin dilaurate, methyltrimethoxysilane and a curing accelerator. According to the mildew-proof silicone sealant with the high curing rate and the high adhesive strength, the surface drying time is 9-13 minutes, the 24-hour curing depth is 6.3-7.2 mm, the adhesive strength is 3.0-3.6 MPa, the tensile strength is 5.8-6.4 MPa, the shear strength is 3.0-3.9 MPa, the elongation at break is 410-457%, and the mildew-proof grade is 0 grade in 30 days, 60 days, 180 days and 360 days.

The invention discloses a quick-curing polyurethane seamless expansion joint material for roads and a preparation method, and belongs to the technical field of road engineering materials. The material is prepared from polyether polyol, polycaprolactone glycol, a bisphenol A epoxy-polyether block isocyanate terminated prepolymer, a methyl phenyl silicon-boron hybrid hydroxyl chain extender, diphenylmethane diisocyanate, calcium carbonate, wollastonite, a hindered amine anti-aging agent and dioctyl phthalate. Wherein the bisphenol A epoxy-polyether block isocyanate terminated prepolymer is prepared by the following steps: reacting bisphenol A with epoxy chloropropane to generate epoxy resin, reacting with polytetramethylene ether glycol, and introducing isophorone diisocyanate; the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation and ethylene glycol reaction on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester; and the methyl phenyl silicon-boron hybrid hydroxyl chain extender is prepared by carrying out hydrosilylation on methyl trimethoxy silane, 3-glycidyl ether oxypropyl trimethoxy silane and allylboronic acid pinacol ester. The material has the advantages of quick curing property, weather resistance and high-temperature stability, and is suitable for road seamless expansion joint scenes.

The invention relates to the technical field of ship protection materials, in particular to a ship accessory rust-proof coating and a preparation method thereof.The ship accessory rust-proof coating comprises the following three-layer structure and components from inside to outside: a basic corrosion-resistant layer comprises 10-30 parts of a nano ceramic material; 5-15 parts of a rare earth oxide; 0.5 to 1.5 parts of aminated graphene oxide; 40 to 60 parts of fluorocarbon resin; 20 to 30 parts of epoxy-polyurethane hybrid resin; 3-8 parts of a zinc phosphate corrosion inhibitor; 2-5 parts of a self-repairing microcapsule; 1-3 parts of a photoinitiator; the interface transition layer comprises the following components in parts by weight: 3-5 parts of gamma-aminopropyltriethoxysilane; 2-5 parts of organic silicon resin coated copper powder; the antifouling surface layer comprises the following components in parts by weight: 10-15 parts of Cu coated SiO2 core-shell particles; 10 to 15 parts of a copolymer of polydimethylsiloxane and methyltrimethoxysilane; and 1-3 parts of an antifouling auxiliary agent. According to the multifunctional protective coating for the ship, through the synergistic effect of multiple components, comprehensive improvement of corrosion resistance, pollution resistance, self-repairing and construction efficiency is achieved, and remarkable technical progress and practical value are shown.

The invention relates to the technical field of thermal insulation materials, in particular to an aerogel felt and a preparation method thereof.The aerogel felt is composed of a composite fiber base material and multi-component aerogel loaded in the composite fiber base material, the composite fiber base material comprises 65%-75% of alkali-free glass fibers, 15%-20% of modified polyimide fibers, 4%-6% of nanoscale carbon fibers and 8%-12% of basalt fibers, and the multi-component aerogel is loaded in the composite fiber base material. According to the multi-component aerogel, 78%-82% of tetraethoxysilane, 12%-14% of methyltrimethoxysilane, 4%-6% of dimethyldimethoxysilane and 2%-4% of vinyltrimethoxysilane serve as precursors, 1.5%-2.5% of aluminum oxide, 0.8%-1.5% of titanium oxide nanoparticles and 3%-4% of zinc borate are added, a multi-stage reinforced structure is formed, the mechanical property and flexibility of the aerogel felt are remarkably improved, the tensile strength reaches 400 kPa or above, and the tensile strength reaches 400 kPa or above. The flexibility is excellent.

The invention belongs to the technical field of hot melt adhesive processing, and particularly relates to a quick-drying polyurethane hot melt adhesive and a preparation method thereof. The preparation method comprises the following steps: mixing polyether polyol, isocyanate, a chain extender A, a chain extender B, a crystallization promoting agent, a surface drying promoting agent and an auxiliary agent, and carrying out extrusion granulation, wherein the chain extender A is obtained by carrying out a reaction on acrylamide and diethanol amine and then carrying out siloxane modification on the reaction product by utilizing methacryloyloxymethyltrimethoxysilane; and the chain extender B is obtained by reacting tetrakis hydroxymethyl phosphonium sulfate and barium hydroxide octahydrate and oxidizing by hydrogen peroxide. The prepared hot melt adhesive has better viscosity and also has a certain flame-retardant effect.

The invention relates to the technical field of cement-based patching materials, in particular to a modified brucite fiber reinforced magnesium phosphate cement-based patching material and application thereof. The repairing material comprises the following components in parts by weight: 60-70 parts of magnesium oxide, 15-20 parts of phosphate, 5-9 parts of a retarder, 3-5 parts of modified brucite fibers and 10-15 parts of water. The modified brucite fiber is prepared by the following method: (1) soaking brucite fiber in a dihydric phosphate solution, separating out the brucite fiber after soaking, washing and drying to obtain pretreated fiber; and (2) placing the pretreated fiber in an absolute ethyl alcohol solution of methyltrimethoxysilane, then reacting under a heating condition, separating out the fiber after the reaction is completed, and drying to obtain the modified brucite fiber. The problem that the fluidity, the bonding strength and the fracture toughness of a magnesium phosphate cement-based thin layer repairing material doped with fibers cannot be considered at the same time is effectively solved.

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 discloses a preparation method of methyl phenyl silicone resin. The methyl phenyl silicone resin is prepared by carrying out hydrolysis and polycondensation on methyltrimethoxysilane with a structural formula of CH3S i (OCH3) 3, trimethylmethoxysilane with a structural formula of (CH3) 3S iOCH3, diphenyldimethoxysilane with a structural formula of (C6H5) 2S i (OCH3) 2 and phenyltrimethoxysilane with a structural formula of C6H5Si (OCH3) 3, and adding a solvent. According to the method, acidic wastewater is not generated, treatment with a large amount of cost is avoided, pollution to the natural environment can be reduced, the current green and environment-friendly requirements are met, by-products can be effectively utilized, and the method has good product performance and meets the application requirements.

The invention discloses a high-temperature-resistant and corrosion-resistant coating for an aluminum alloy heat exchange tube and a preparation method thereof, and relates to the technical field of coating materials. The method comprises the following steps that the aluminum alloy heat exchange tube is cleaned and deoiled, then a treating agent is sprayed, composite coating slurry is sprayed to the surface of the aluminum alloy heat exchange tube after curing, and the high-temperature-resistant and corrosion-resistant coating for the aluminum alloy heat exchange tube is obtained after curing treatment. Wherein the treating agent is prepared from NS-30 silica sol, deionized water and methyltrimethoxysilane; the composite coating slurry is prepared from a polyamide acid solution, a synergist, functionalized boron nitride nanosheets, modified hexagonal boron nitride, a flatting agent and a defoaming agent. The silane film introduced into the treating agent and the synergist, the functionalized boron nitride nanosheet and the modified hexagonal boron nitride introduced into the composite coating slurry effectively improve the high temperature resistance, the corrosion resistance, the adhesive force, the thermal conductivity, the aging resistance and the toughness of the coating. Therefore, the method has a wider application prospect.

The invention relates to the technical field of building, chemical engineering and energy heat preservation, and discloses a silicon-based aerogel composite material and a preparation method and application thereof. The invention relates to a light-emitting diode (LED) photo-curing agent, which is prepared from tetraethyl orthosilicate, methyltrimethoxysilane, allyltriethoxysilane, pentaerythritol tetra (3-mercaptopropionate), N-(3-(triethoxysilyl) propyl) furfuryl amine, N-(3-(triethoxysilyl) propyl) maleimide, a photoacid generator and a photoinitiator. The composite material has a three-dimensional porous silicon dioxide network skeleton and a polymer interpenetrating network, the three-dimensional porous silicon dioxide network skeleton is formed by copolymerization of tetraethyl orthosilicate and methyltrimethoxysilane, and the polymer interpenetrating network is formed by reaction of pentaerythritol tetra (3-mercaptopropionate) and allyltriethoxysilane. The preparation method comprises the steps of sol preparation, light curing, solvent replacement, surface hydrophobic modification and normal-pressure drying. The material shows excellent thermal insulation and mechanical properties in the fields of building heat insulation, pipeline heat preservation and cryogenic heat insulation.

The invention relates to the technical field of wind power and power grid equipment anti-icing, and discloses a fluorosilicone oil microcapsule anti-icing coating for wind power and power grid equipment. Comprising the following components which are independently subpackaged: a component A, namely a nano ceramic pre-dispersion: 20-30 parts of methyltrimethoxysilane, 5-8 parts of tetraethoxysilane, 40-60 parts of isopropanol and 10-15 parts of silicon dioxide nanoparticles with perfluoroalkyl grafted on the surfaces; the component B is microcapsule dry powder: 25-40 parts of mesoporous alumina microcapsules filled with fluorosilicone oil, 1-4 parts of amino modified carbon nanotubes and 2-5 parts of an oxygen vacancy defect type titanium dioxide photocatalyst, the microcapsules are triggered to release the fluorosilicone oil through the volume expansion rate of a thermal expansion layer and stress sensitive layer composite wall material at low temperature, and meanwhile, when ice pressure exists, the stress sensitive layer can release the fluorosilicone oil, so that the stress sensitive layer can release the fluorosilicone oil. And the polydopamine-coated aluminum oxide layer is elastically deformed to synergistically release the fluorosilicone oil to form a dual-mode anti-icing mechanism.

The invention belongs to the technical field of ultra-thin glass, and particularly relates to a folding screen protector and a preparation process thereof. The folding screen protector sequentially comprises a functional base film layer, a thermosetting resin film layer, a UTG layer, a thermosetting resin film layer and an OCA adhesive film layer from top to bottom. A layer of photocureable coating added with modified silicon dioxide and methallyl polyhedral oligomeric silsesquioxane is sprayed on PET resin to serve as a functional base film, and a rigid phenyl group is introduced into a molecular structure of a thermosetting resin film; according to the invention, methyltrimethoxysilane, phenyltrimethoxysilane and 3-glycidyl ether oxypropyl trimethoxysilane are adopted as monomers for co-polymerization to obtain high-transparency polysiloxane as an OCA adhesive, so that the bending performance and the impact resistance of the folding screen protector are effectively improved.

The invention provides a fire-resistant inorganic fiber cotton board and a preparation method thereof, and belongs to the technical field of fire-resistant materials. The preparation method comprises the following steps: carrying out acid leaching treatment on sepiolite powder by using phosphoric acid, loading ammonium polyphosphate, drying and crushing to obtain a product A; enabling DOPO to react with gamma-aminopropyltriethoxysilane, and stirring and dissolving to obtain a product B; methyltrimethoxysilane and diethanol amine are subjected to hydrolytic polycondensation, dibutyltin dilaurate is added for continuous reaction, and a product C is obtained; combining raw materials including sodium silicate, potassium silicate, the product A, the product B, the product C and the like to prepare a curing liquid; melting and centrifuging the slag into cotton, and carrying out wet forming to obtain an inorganic fiber cotton plate rough blank; and the inorganic fiber cotton board rough blank is subjected to vacuum dehydration, then a curing liquid is sprayed, and the fireproof inorganic fiber cotton board is obtained after drying. The inorganic fiber cotton board is subjected to double-sided spraying by adopting the new curing liquid, so that the fireproof performance is high, and the mechanical property of the inorganic fiber cotton board can be enhanced.

The invention discloses a resin binding agent for a resin diamond wire, the resin diamond wire and a preparation method of the resin binding agent, and belongs to the technical field of binding agents for resin diamond wires. Two brand-new modified compounds are designed and synthesized, boron-containing and nitrogen-containing compounds are introduced to form a covalent bond enhanced polyurethane derivative; and the other one is a double-functional-group siloxane oligomer containing an epoxy group and a carboxyl group, which is prepared by carrying out hydrolytic condensation on raw materials such as methyltrimethoxysilane and the like, neutralizing and purifying. The resin binder takes epoxy-phenolic hybrid resin as a main body and is compounded with the two modified compounds, a curing agent, a coupling agent and other components. The resin diamond wire is prepared through wire core pretreatment, glue solution preparation, coating, multi-stage curing and post-treatment. The heat resistance, the bonding strength with diamond and the impact toughness of the bonding agent are remarkably improved, and the bonding agent is suitable for high-precision cutting of hard and brittle materials such as photovoltaic silicon wafers and the like.

The invention relates to the technical field of thermal insulation materials, in particular to a high-temperature-resistant aerogel composite material and a preparation method thereof. The high-temperature-resistant aerogel composite material is prepared from the following components in parts by weight: 15 to 35 parts of reinforced fiber matrix, 43 to 65 parts of silicon-aluminum-zirconium ternary aerogel network, 3 to 12 parts of functional nano filler, 2 to 8 parts of zinc borate flame-retardant component and 0.5 to 2 parts of surface hydrophobic modified layer. Wherein the reinforced fiber matrix is composed of aluminum silicate fibers, silicon carbide fibers and aluminum oxide nanofibers; the molar ratio of silicon to aluminum to zirconium in the silicon-aluminum-zirconium ternary aerogel network is 5: 2: 1; the functional nanofiller comprises aluminum oxide nanoparticles, titanium oxide nanoparticles, carbon nanotubes and boron nitride nanosheets; the zinc borate flame-retardant component is zinc borate; the surface hydrophobic modification layer comprises an inner methyltrimethoxysilane modification layer and an outer hexamethyldisilazane modification layer. The high temperature resistance and thermal shock resistance of the material are remarkably improved, a low-energy-consumption preparation process is adopted, and the material has excellent comprehensive performance.

The invention discloses an aluminum oxide coated diaphragm and a preparation method thereof in the field of lithium ion battery diaphragms. The diaphragm comprises aluminum oxide particles, a fluorine-containing porous organosilicon compound, a phosphorus heterocyclic covalent organic framework, a binder, a dispersant and deionized water. The fluorine-containing porous organosilicon compound is prepared by mixing methyltrimethoxysilane, perfluorohexyltrimethoxysilane and water, adding ammonia water to adjust the pH value, then reacting to form a sol-gel system, adding amino silane to continue reacting, and then carrying out rotary evaporation, calcination and grinding. The phosphorus heterocycle covalent organic framework is prepared by dissolving cyanuric chloride, triphenylphosphine oxide and anhydrous tetrahydrofuran, adding imidazole bromide to react to form an intermediate, then adding ethylene glycol to continuously react, and performing vacuum drying and grinding to obtain the phosphorus heterocycle covalent organic framework. According to the diaphragm, the interface adhesion and electrolyte wettability are enhanced synergistically through the bifunctional compound, and the thermal stability and the cycle performance are improved.

The preparation method comprises the following steps: firstly, dispersing hydroxylated carbon nanotubes in water, carrying out ultrasonic treatment to form a uniform dispersion liquid, and then uniformly mixing the uniform dispersion liquid with a bacterial cellulose dispersion liquid, so as to obtain the carbon nanotube-based aerogel with the photo-thermal electric heating effect. Adding methyltrimethoxysilane sol which is hydrolyzed in advance, stirring to form a precursor system, and then performing directional freezing, freeze drying and heat treatment to obtain the carbon nanotube-based aerogel with the photo-thermoelectric heating effect. The carbon nanotube-based aerogel has the super-hydrophobic characteristic, the surface water contact angle is 161 DEG C, the surface temperature is rapidly increased to 126.7 DEG C under applied voltage, photo-thermal response is rapidly generated under simulated sunlight irradiation, the surface temperature is rapidly increased to 117.7 DEG C, and the carbon nanotube-based aerogel is suitable for rapid adsorption and separation of high-viscosity crude oil, has excellent chemical stability and mechanical stability, and can be used in the field of adsorption and separation of high-viscosity crude oil. And after the surface is broken, excellent super-hydrophobic performance and efficient photo-thermal-electric-thermal response capability are still kept.

The invention discloses a high-temperature-resistant anti-adhesion superhard transparent fluorine-free green organic silicon coating and a preparation method thereof, and belongs to the technical field of organic silicon coatings. According to the invention, methyltrimethoxysilane, silica sol, hydroxyl silicone oil, isopropanol and water are used as raw materials to prepare a high-temperature-resistant anti-adhesion superhard transparent fluorine-free green organic silicon coating, and a design strategy of manufacturing a nanoscale polysiloxane coating through an organic silicon precursor controllable sol-gel hydrolysis process is adopted. According to the present invention, the coating with the matrix completely composed of the in-situ generated nano SiO2 particles is prepared, the defect minimization and the highly-crosslinked Si-O-Si network structure are achieved, the nano-scale inorganic structure has long-term thermal stability, and the visible light transmittance of the coating can achieve 98% due to the inhibition of the light scattering by the sub-wavelength particle size; and tiny nano particles are uniformly and tightly arranged on the surface of the coating, so that the coating is endowed with ultrahigh hardness. In addition, the coating still maintains the inherent antifouling property of the organic silicon coating.

The invention relates to the technical field of ceramics, and particularly discloses green special refractory ceramic slurry as well as a preparation method and application thereof. The green special refractory ceramic slurry is prepared from aluminum oxide, methyltrimethoxysilane-phosphoric acid modified polysiloxane, fluorocarbon emulsion, expanded vermiculite powder, silane coupling agent modified feldspar tailing powder, a dispersing agent, an organic silicon defoaming agent, a polyurethane curing agent and deionized water. After being sintered, the green special refractory ceramic slurry provided by the invention has excellent high-temperature stability, corrosion resistance, thermal shock resistance and mechanical strength, and solves the problems of low high-temperature-resistant upper limit and poor corrosion resistance of the traditional slurry, so that the sintered ceramic adapts to severe high-temperature working conditions such as steel plant converter liners and chemical high-temperature reaction kettle inner walls; and long-term protection requirements of industrial equipment are met.

The invention relates to a reversible hydrophilic / hydrophobic magnetic biomass foam material as well as a preparation method and application thereof. According to the magnetic biomass foam material, biomass waste is adopted as a matrix, a zinc chloride / phosphoric acid / ammonium dihydrogen phosphate three-component eutectic solvent is used for processing and preparing nano cellulose under the room temperature condition, a normal-pressure foaming technology is used, lauryl sodium sulfate, titanium dioxide and a ferroferric oxide modified solution are introduced, and the magnetic biomass foam material is prepared. The preparation method comprises the following steps: preparing a magnetic biomass foam material, adding a methyltrimethoxysilane / tetramethoxysilane copolymer emulsion, carrying out low-temperature gradient drying to prepare the magnetic biomass foam material in one step, and regulating and controlling an interface group through a water / ethanol solvent to realize on-demand switching of hydrophilic / hydrophobic properties of the magnetic biomass foam material. The problems that a biomass foam material is single in function and complex in preparation process are effectively solved, the purpose of efficient separation and removal of hydrophilic / hydrophobic pollutants in industrial wastewater is achieved, the removal rate is 98% or above, the preparation method is simple, and high application value is achieved.

The invention belongs to the field of flame-retardant thermal insulation materials, and particularly relates to flame-retardant silicone rubber and a production process thereof. The flame-retardant silicone rubber comprises the following formula components: methyl vinyl silicone rubber, fluorinated silicone rubber, a compound flame retardant, a filler, a silane coupling agent, an antioxidant, a lubricant and a vulcanizing agent, the compound flame retardant is prepared from a carbon nano tube, nano silicon dioxide and a nitrogen-phosphorus complexing agent according to the mass ratio of (4 to 7) to (11 to 13) to (16 to 19). The preparation method comprises the following steps: reacting dimethyl phosphate with methacrylamide to obtain an intermediate, then adding trimethylolpropane, reacting to obtain a nitrogen-phosphorus complexing agent of which the molecular structure simultaneously contains a phosphate group and hydroxymethyl, and preparing nano silicon dioxide with a porous network by taking tetraethoxysilane and methyltrimethoxysilane as silicon sources. The carbon nano tube, the nano silicon dioxide and the nitrogen-phosphorus complexing agent jointly form a compound flame retardant, and the compound flame retardant is added into the flame-retardant silicone rubber, so that the heat insulation property and the flame retardance of the flame-retardant silicone rubber are effectively improved.

The invention belongs to the technical field of organic and inorganic composite materials, particularly discloses a modification method of hollow glass beads and application of the hollow glass beads in a PU adhesive, and aims to solve the problems of poor storage stability, high viscosity change rate and the like of a composite material due to the fact that the surfaces of the hollow glass beads contain silicon hydroxyl and free alkali metal in the prior art. According to the invention, an alkyl silane coupling agent (such as methyltrimethoxysilane and n-octyltriethoxysilane) which does not contain active hydrogen is adopted to carry out surface modification on hollow glass beads. The method comprises the following specific steps: S1, acidizing microspheres with a hydrochloric acid solution to remove surface metal ions; and S2, hydrolyzing the alkylsilane coupling agent, and bonding the hydrolyzed alkylsilane coupling agent with silicon hydroxyl on the surface of the microbead. The compatibility of the obtained modified microbead and an isocyanate prepolymer is remarkably improved, the viscosity change rate is low, and the curing phenomenon is avoided. The preparation method is simple in process and low in cost, and can be widely applied to the fields of coatings, adhesives and lightweight composite materials.

The invention discloses a ceramic coating for a metal door and a preparation method of the ceramic coating, and relates to the technical field of coatings. The prepared ceramic coating is prepared from sodium silicate, methyltrimethoxysilane, modified polyacrylate emulsion, modified silicon dioxide, glass powder, sodium fluosilicate, a dispersing agent, a flatting agent and pure water. The modified polyacrylate emulsion is obtained by polymerizing a phosphorus-containing monomer and a vinyl monomer to generate polyacrylate, carrying out sulfonyl chlorination on the polyacrylate, reacting with 5-chloromethyl-2-pyrimidinamine, and emulsifying; the preparation method comprises the following steps: polymerizing aniline on the surface of pretreated silicon dioxide, reacting with 1-benzothiophene-5-carbonyl chloride, salinizing with diphenyl iodide trifluoromethanesulfonate and copper acetate, and reacting with bis (2-ethynylphenyl) sulfane to obtain the silicon dioxide. The prepared ceramic coating has good corrosion resistance, antibacterial property and ageing resistance, and the performance of the metal door is greatly improved.

The invention discloses photo-thermal hydrophobic composite aerogel for crude oil adsorption and a preparation method of the photo-thermal hydrophobic composite aerogel. The composite aerogel is obtained by uniformly mixing a polyvinyl alcohol solution, a copper sulphide-loaded bacterial cellulose dispersion liquid and methyltrimethoxysilane sol, reacting and then sequentially carrying out pre-freezing treatment, freeze drying and heat treatment. The photo-thermal hydrophobic composite aerogel provided by the invention has excellent hydrophobicity and elasticity, large adsorption capacity on oily substances and excellent photo-thermal performance, can be used as an adsorbent for crude oil recovery, can be repeatedly utilized, and has practical popularization and application values.

The invention belongs to the technical field of thermal management materials, and particularly relates to cellulose-based aerogel with radiation refrigeration and flame retardant functions and a preparation method and application thereof. Bacterial cellulose membranes are dispersed in a solvent to be homogenized, and suspension liquid is obtained; methyl trimethoxy silane is added into the suspension liquid for silanization modification, and silanization bacterial cellulose suspension liquid is obtained after chemical crosslinking; and uniformly dispersing magnesium-aluminum layered double hydroxides in the suspension, and then freeze-drying the magnesium-aluminum layered double hydroxides to obtain the cellulose-based aerogel. The aerogel prepared by the invention has a multi-dimensional micro-nano structure, can effectively reflect sunlight and emit infrared rays, and has excellent radiation refrigeration performance. In addition, due to intercalation introduction of the magnesium-aluminum layered double hydroxides, the radiation refrigeration capacity of the material is further improved, and meanwhile the material is endowed with the excellent flame-retardant characteristic.

The invention discloses a preparation method of an antibacterial warm-keeping fabric, and relates to the technical field of textiles. When the antibacterial warm-keeping fabric is prepared, firstly, (E)-butyl-2-ene-1, 4-diamine, glyoxal, formaldehyde and butyric acid are used as raw materials to synthesize a polyimidazolium salt antibacterial agent, then the polyimidazolium salt antibacterial agent is copolymerized with polytetrahydrofuran ether glycol and diphenylmethane diisocyanate to prepare an antibacterial polyurethane spinning solution, and the antibacterial fabric is obtained through wet spinning and weaving. The preparation method comprises the following steps: reacting L-cysteine with 3-amino propyl triethoxy silane to prepare cysteamine acyl propyl triethoxy silane, reacting with formaldehyde and phosphorous acid to obtain flame-retardant modified silane, and further preparing a silicon dioxide solution from the flame-retardant modified silane and sol-gel such as methyltrimethoxysilane; finally, the antibacterial fabric is treated with a benzophenone solution and then soaked with a silicon dioxide solution, and the antibacterial thermal fabric is prepared through ultraviolet irradiation, standing gelation, aging and hexane washing. The prepared fabric has excellent antibacterial property, heat retention property and flame retardant property.

The invention relates to a high-salt-tolerance asymmetric solar interface evaporator and a preparation method. Nano-crystalline cellulose with low thermal conductivity is used as a base material, carbon black with good photothermal conversion performance is used as a photothermal layer, methyltrimethoxysilane is used as a hydrophobic modifier, and the high-salt-tolerance asymmetric solar interface evaporator with a vertical pore channel structure is constructed through a directional freezing technology. The evaporator is composed of a cellulose hydrophilic lower layer and a carbon black hydrophobic upper layer, water can be rapidly transported to an evaporation interface through the capillary action of cellulose, the carbon black hydrophobic upper layer can improve the light absorption capacity and the heat positioning capacity of the evaporator, and continuous and efficient water evaporation is achieved. Cellulose cation modification and an asymmetric structure can reduce the generation of salt crystals, can significantly improve the salt resistance of the evaporator, has a good application prospect in the field of solar seawater desalination, and has wide practical application potential due to easy preparation, enlargement and low cost.

The present application belongs to the technical field of silica sol preparation, and particularly relates to a silica sol preparation method using ion exchange method. In the prior art, the silica sol growth time is shortened by optimizing the preparation and impurity removal process, and the silica sol seed mother liquor is prepared under ultrasonic assistance. The organic alkali catalyst maintains the silica sol growth pH and the metal ions in the complex solution, so that the impurities are reduced during the silica sol growth. After the introduction of dodecyltrimethoxysilane, hexadecyltrimethoxysilane and methyltrimethoxysilane as the hydrophobic group surface modification, the impurity metal ions are filtered through the complexing agent and the ammonium type resin. The three ethylene tetramine ethanol solution modifies the ammonium type resin, enhances the selective adsorption of the resin to the metal ions, and the maleic anhydride crosslinking agent and nano silicon dioxide modify the ammonium type resin, increase the service life of the ammonium type resin. The prepared silica sol has high purity, good mechanical properties and dispersibility, and excellent hydrophobic performance.

A method for preparing methyl silicone resin for high-temperature mica boards includes: (1) Solution A is a mixture of methyltrimethoxysilane, dimethyldimethoxysilane, and epoxysilane coupling agent, which account for 87%-95%, 3%-7%, and 2%-6% of the total amount of A, respectively; (2) Adding 0.5-1.0 times the amount of benzene solvent, 0.2-0.3 times the amount of isopropanol, and adding 0.5%-1% of the total amount of A acidic catalyst to obtain solution B; (3) Heating B to 70℃-80℃, and uniformly adding deionized water, and adding... The time is controlled at 2-3 hours. After the addition is completed, continue stirring for half an hour to obtain solution C. The amount of deionized water is 40%-50% of the total amount of A. (4) Transfer C to a separatory funnel and let it stand to separate into layers. The lower layer of methanol solution is purified by distillation, and the upper layer of silanol solution is washed with water until neutral to obtain solution D. (5) Heat D and reflux for condensation reaction. Maintain the temperature at 130℃-140℃ for half an hour, then cool to room temperature and add benzene solvent to form a 50%-60% concentration of methyl silicone resin for high-temperature mica boards. The benzene solvent content is 40%-50%. It is environmentally friendly, has a simple process, excellent bending resistance, and good moisture resistance.

The invention relates to a preparation method of a hydrolysis modified organic silicon high-temperature-resistant anticorrosive coating, and belongs to the technical field of anticorrosive coatings. The preparation method comprises the following steps: heating 1, 1 '-bis (dimethylsilyl) ferrocene, methylbenzene, chloroplatinic acid, 2, 2, 3, 3, 4, 4, 4-heptafluorobutyl acrylate and bis-(2-methylallyl) cyclooctyl-1, 5-diene ruthenium, and reacting to obtain an intermediate product 1; weighing methyltrimethoxysilane, phenyltrimethoxysilane and the intermediate product 1, uniformly stirring and mixing, slowly dropwise adding diluted hydrochloric acid, hydrolyzing, and heating to react, so as to obtain modified silicon resin; adding the modified silicon resin into petroleum ether, and adding silicone oil, an organic tin catalyst, a bis-ammonia coupling agent, filler and a curing agent to obtain the anticorrosive paint.