1866 results about "Nano silicon dioxide" patented technology

The invention discloses a high-content steel slag-based functionalized nano-composite cementing material and a preparation method thereof, and belongs to the technical field of solid waste resource comprehensive utilization. The nano composite cementing material is prepared from the following raw materials in parts by mass: 50 to 65 parts of steel slag, 10 to 20 parts of fly ash, 10 to 25 parts of carbide slag, 8 to 15 parts of desulfurized gypsum, 0.3 to 1.0 part of nano silicon dioxide and 0.003 to 0.03 part of silane coupling agent. On the basis of a solid waste synergism theory and an internal alkali excitation effect, quaternary solid wastes such as steel slag and fly ash are optimized and compounded by adopting methods of mechanical-thermal activation, addition of modified nano silicon dioxide, synergistic gelling between solid wastes and the like; the paint is prepared through gradient grinding and a medium-temperature wet curing process. The preparation method is simple, high-temperature calcination is not needed, cement clinker and exogenous excitant do not need to be added, the obtained cementing material can replace part of cement to be applied to the fields of road bases, mine filling, low-carbon building material products and the like, resource utilization and high-value utilization of regional bulk industrial solid waste can be achieved, and carbon emission and production cost are effectively reduced.

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The invention discloses a relief touch heat transfer film and a preparation process thereof, and relates to the technical field of transfer film preparation, the heat transfer film comprises the following structural layers from bottom to top: a substrate layer, which is composed of a polyester film PET; the release layer is positioned above the base material layer and is composed of modified silicone oil, and nano silicon dioxide particles are added into the modified silicone oil; the transfer printing layer is positioned above the release layer and comprises a pattern layer and an embossment texture layer; according to the scheme, a spring pressing plate-sand grain grinding bin is additionally arranged at the front printing section of the heat transfer printing film preparation process, the film surface penetrates through a sand layer in the bin along a guide plate and a guide shaft with constant tension, micron-sized grooves are formed in the film surface through sand grains in a ploughing mode, and high-frequency polarization coarsening of corona discharge is replaced; the spring pressing plate is automatically pressed down along with the fluctuation of the film thickness, the sand layer is kept compact, the depth of the grooves is consistent, the water-based ink is spread and cured along the grooves during subsequent water-based ink printing, mechanical locking is formed, the ink is prevented from being pulled up during embossment embossing, and corona-free and ozone-free film surface coarsening is achieved.

The invention relates to the field of packaging materials, and discloses low-temperature heat-sealing water-based coated paper and a preparation method and application thereof.The water-based coated paper comprises a base paper layer and a water-based coating, and the water-based coating comprises water-based ethylene-acrylic acid copolymer emulsion, modified nano-silica, a coalescing agent and water; a cardanol derivative is introduced into the water-based ethylene-acrylic acid copolymer emulsion as a functional component; the cardanol derivative is prepared by reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and then grafting with acryloyl chloride. The preparation method comprises the following steps: reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; the modified nano silicon dioxide is prepared by mixing aminated nano silicon dioxide and chitosan and adding a cross-linking agent prepared by grafting phytic acid and ethylene glycol diglycidyl ether. The water-based coating paper prepared by the invention overcomes the defects that the existing BOPP film is not environment-friendly, and the conventional coating paper is high in heat sealing temperature and easy to stick; meanwhile, good mechanical properties, water resistance and flame retardance are achieved.

The invention discloses an aluminum substrate UV matt finish paint and a preparation process thereof, and relates to the technical field of paints.The aluminum substrate UV matt finish paint is prepared from, by mass, 10%-20% of modified polyurethane acrylate, 25%-32% of high-functionality aliphatic polyurethane acrylate, 18%-30% of special modified epoxy acrylate resin, 0.5%-2% of dispersing agent, 0.1%-0.5% of defoaming agent, 1%-3% of anti-settling powder and the balance water. The paint is prepared from the following components in percentage by weight: 10 to 15 percent of magnesium silicate mineral, 1 to 10 percent of matting powder, 0.2 to 1 percent of 1-hydroxycyclohexyl phenyl ketone, 0.5 to 3 percent of trimethylbenzoyl-diphenyl phosphine oxide, 1 to 3 percent of acrylate flatting agent, 0.2 to 1.2 percent of polyurea modified polyurethane rheological agent and 5 to 15 percent of trimethylolpropane triacrylate. According to the UV matte finishing paint disclosed by the invention, through compounding of ternary resin and enhancement of nano silicon dioxide, a rigid and tough cross-linked network is constructed, a paint film is free of cracks when being bent at 180 degrees, the adhesive force reaches grade 0, and a coating is resistant to acid and alkali etching liquid and free of corrosion by cooperating with a silane coupling agent and a light stabilization system, and the color difference is delta Elt after the UV matte finishing paint is subjected to high temperature of 260 DEG C; and 1.5, the anti-yellowing performance is excellent.

The invention discloses a siloxane-polyether copolymer modified coking defoaming agent as well as a preparation method and application thereof, and belongs to the technical field of auxiliary chemicals. The preparation method comprises the following steps: synthesizing an epoxy group functionalized siloxane oligomer, preparing a modified siloxane-polyether copolymer matrix, constructing core-shell structure functionalized silicon dioxide in situ, and carrying out blending aftertreatment, wherein DCS and SIS linkage control is adopted in the whole process. In order to overcome the defects that the compatibility of siloxane and polyether is poor, nano silicon dioxide is easy to agglomerate and the high-temperature performance attenuation is fast in the existing coking defoaming agent, a molecular bridge mediated bonding and in-situ core-shell structure construction synergistic scheme is provided, the molecular-level compatibility of components is realized, the high-temperature stability and the lasting defoaming performance of the defoaming agent are improved, and the defoaming agent has a good application prospect. The defoaming agent is suitable for delayed coking process efficient defoaming.

The invention belongs to the technical field of vehicle protection materials, and particularly relates to a coating for an explosion-proof vehicle. The coating is composed of an adhesion bottom layer, an energy-absorbing middle layer and an anti-impact outer layer, wherein the adhesion bottom layer contains epoxy resin and flaky zinc powder / mica powder, and a laminated shielding structure is formed to improve the adhesion force to be larger than or equal to 8 MPa; the energy-absorbing middle layer is a composite material of modified nano silicon dioxide / polyethylene glycol-based STF and silanized aramid fiber, the viscosity of the energy-absorbing middle layer is sharply increased by more than 50 times at the strain rate of 500s <-1 >, and 65% of explosion impact energy can be absorbed; the anti-impact outer layer adopts a polyurea elastomer to wrap gradient distribution silicon carbide microspheres, pyramid-shaped protrusions are designed on the surface, the fragment defense speed reaches 430 m / s, and the shock wave reflection dispersion is increased by 50%. The whole anti-explosion coating passes UL94V-0 certification through a synergistic flame-retardant system, the chemical protection and self-cleaning capacity is improved through a super-hydrophobic surface layer, and the problems that a traditional anti-explosion coating is poor in adhesive force, weak in composite threat resistance and insufficient in environmental adaptability are solved.

The invention discloses steel fiber reinforced metakaolin-based recycled concrete and a preparation method thereof, and belongs to the technical field of civil engineering materials. The concrete is prepared from the following components in percentage by mass: 60wt%-80wt% of recycled aggregate, 20wt%-40wt% of a cementing material, 0.5 wt%-1.4 wt% of steel fibers and 0.1 wt%-0.7 wt% of an additive, wherein the cementing material comprises cement and metakaolin, and the mass ratio of the metakaolin to the cement is (1-3): (7-9). A nano silicon dioxide coating is arranged on the surface of the steel fiber. The preparation method adopts a step-by-step stirring process. The problem that dynamic impact resistance and green low carbon are difficult to cooperate in the prior art is solved, through component optimization and process control, the dynamic compressive strength of the concrete is improved, the energy absorption capacity is improved, the damage mode is converted into ductility from brittleness, fiber distribution is uniform, and the concrete is suitable for impact-resistant projects such as airport runways and protective structures.

The invention provides high chloride ion permeation resistance steel fiber fine aggregate concrete and a preparation method thereof. The high chloride ion permeation resistance steel fiber fine aggregate concrete comprises the following raw materials in parts by weight: 200-300 parts of cement; 30 to 50 parts of metakaolin; 100 to 200 parts of fly ash; 50 to 100 parts of mineral powder; 1-8 parts of nano silicon dioxide; 800 to 1000 parts of sand; 800 to 1000 parts of stone; 10 to 60 parts of steel fiber; 150 to 200 parts of water; and 5-20 parts of a water reducing agent. The steel fiber fine aggregate concrete with high chloride ion permeation resistance has the advantages of improved mechanical properties and durability, extremely high chloride ion permeation resistance, excellent volume stability, low material cost, economic feasibility of large-scale application, and wide application prospect. And the strict service requirements of the urban rail transit ballast bed under the long-term dynamic load, stray current and erosion medium coupling effect are precisely met.

The invention belongs to the technical field of soil curing materials, and relates to a salinized soil curing agent and a preparation method thereof. The composite material comprises the following components in parts by mass: 20-40 parts of a bio-based polymer cementing material; 10 to 20 parts of modified bentonite; 15 to 30 parts of superfine slag powder; 1 to 5 parts of nano silicon dioxide; 5 to 15 parts of magnesium phosphate cement; 3-8 parts of a plant fiber reinforced material; 0.5 to 2 parts of a dispersant; and 2-6 parts of a composite slow-release salt-resistant additive. The problems that a traditional curing agent is weak in salt corrosion resistance and poor in durability in salinized soil are solved, the mechanical property and long-term stability of cured soil are remarkably improved, and the environment-friendly, efficient and high-adaptability salinized soil reinforcing effect is achieved.

The invention discloses a method for improving the performance of recycled aggregate concrete, and belongs to the technical field of building materials. The preparation method comprises the following steps: preparing a modified solution which is compounded by double components of gamma-methacryloxy propyl trimethoxy silane and vinyl triethoxy silane; carrying out surface modification on the recycled aggregate by adopting a graded pre-wetting-spraying composite modification method; preparing a slag powder-fly ash-nano silicon dioxide ternary composite admixture; preparing a concrete mixture according to the mixing ratio; through surface modification of the silane coupling agent and cooperation of the composite admixture, the problems of poor workability and low strength of the concrete caused by high water absorption of the recycled aggregate are effectively solved, the 28d compressive strength of the prepared concrete is improved by 20-30%, the anti-freezing grade reaches F200, and the shrinkage rate is reduced by 15-25%.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a prismatic aluminum hypophosphite compound as well as a preparation method and application thereof. The prismatic aluminum hypophosphite compound is prepared from aluminum hypophosphite, layered montmorillonite and nano silicon dioxide, and the weight percentage of the layered montmorillonite is 0.043 to 0.087 weight percent and the weight percentage of the nano silicon dioxide is 0.0036 to 0.0181 weight percent based on 100 weight percent of the aluminum hypophosphite; the particle size D10 of the prismatic aluminum hypophosphite compound is 1-3 microns, the particle size D50 of the prismatic aluminum hypophosphite compound is 5-8 microns, the particle size D90 of the prismatic aluminum hypophosphite compound is 10-15 microns, the particle size D97 of the prismatic aluminum hypophosphite compound is smaller than 20 microns, and the prismatic aluminum hypophosphite compound is of a single prismatic crystal structure or a regular structure in which a plurality of prismatic crystals are mutually embedded. The prismatic aluminum hypophosphite compound provided by the invention has a specific morphology and is especially suitable for a polyurethane flame-retardant system.

The invention discloses a preparation method of a nano silicon dioxide modified high-density polyethylene wear-resistant plate, and belongs to the technical field of polyethylene plates, the method comprises the following steps: firstly preparing an antioxidant PMMA microcapsule, then preparing titanium dioxide and silicon dioxide, and modifying by KH550 to obtain modified nano titanium-silicon composite particles; then, an antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles, POE-g-MAH and HDPE particles are premixed, and the wear-resistant plate is obtained through twin-screw extrusion granulation and pulsating force field assisted molding; through the synergistic effect of the antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles and the compatilizer POE-g-MAH, the problems that the wear resistance of the HDPE plate is insufficient and the antioxidant is easily adsorbed by nano silicon dioxide to cause aging resistance attenuation are solved, and the wear resistance, thermal oxidation / light aging resistance and mechanical property improvement of the plate are realized; and the requirements of high-frequency wear scenes such as mine conveying and outdoor engineering can be met.

The invention relates to the technical field of building materials, and particularly discloses an efficient and energy-saving building thermal insulation material and a preparation method. The material is prepared from modified aerogel, composite mineral fibers, phase change energy storage microcapsules, nano silicon dioxide, waterborne epoxy resin, a polyamide curing agent, expanded perlite, hollow glass beads, hydroxypropyl methyl cellulose, amino modified polyurethane microspheres and nano boron nitride, and the functions of all the components are complemented to form a synergistic system. The preparation method sequentially comprises the following steps: pretreatment of the composite mineral fibers, activation of the amino modified polyurethane microspheres, synergistic dispersion of multiple components, preparation of a bonding system, gradient mixing of materials and molding post-treatment. The material can be widely applied to heat preservation and insulation scenes such as building outer walls and roofs, and has the core advantages of being excellent in heat preservation and insulation, stable in mechanical strength and reliable in long-acting performance; the preparation method disclosed by the invention is refined in process, controllable in parameters, high in repeatability, capable of ensuring uniform product performance and beneficial to industrial large-scale production.

The invention discloses light building corrosion-resistant fiber concrete and a production method thereof, the light building corrosion-resistant fiber concrete comprises the following raw materials by mass: 300-400 parts of high belite sulphoaluminate cement, 10-20 parts of modified corrosion-resistant fiber, 50-80 parts of a mineral admixture, 800-1000 parts of a coarse aggregate, 600-700 parts of a fine aggregate, 5-10 parts of a composite admixture, and 120-150 parts of water; wherein the mineral composition of the high belite sulphoaluminate cement is as follows: 18 to 25 percent of C4AF, 15 to 20 percent of anhydrous calcium sulphoaluminate (C4A3S), 45 to 55 percent of belite (C2S) and less than or equal to 10 percent of other minerals. By optimizing the ratio of C4AF to anhydrous calcium sulphoaluminate in the high belite sulphoaluminate cement and combining with a special calcining process, the contradiction of low early strength caused by increase of the content of C4AF is solved, and meanwhile, a foundation is laid for long-term corrosion resistance; and by adopting a silane coupling agent-nano silicon dioxide composite modification technology, the limitation of limited single modification effect is solved, and the synchronous improvement of the corrosion resistance of the fiber and the interface bonding strength is realized.

The invention discloses a polyurethane foam composition, polyurethane foam, a preparation method of the polyurethane foam and a refrigeration device.The polyurethane foam composition comprises a component A and a component B. The component A comprises polyol, a foaming agent, modified hollow glass beads, modified nano-silica and an additive, the additive comprises one or more of a catalyst, a stabilizer and an antioxidant, and the component B comprises isocyanate. The polyurethane foam prepared from the polyurethane foam composition disclosed by the invention has relatively good heat insulation property.

The invention belongs to the technical field of high polymer materials, and particularly relates to a PET decorative film and a preparation method thereof. The preparation method comprises the following steps: synthesizing hydroxyl-terminated hyperbranched polyester by taking pentaerythritol and 2, 2-dimethylolpropionic acid as raw materials, and reacting with polyol glycidyl ether to prepare an epoxy-terminated organic modifier; silver-loaded nano silicon dioxide subjected to surface treatment by an amino silane coupling agent is used as inorganic functional particles; pET resin, an organic modifier and inorganic functional particles are subjected to melt blending and extrusion granulation, and modified PET is prepared; the modified PET is prepared into the film through a two-way stretching process. Epoxy groups of the organic modifier chemically react with amino groups at the tail end of a PET molecular chain and on the surfaces of inorganic particles respectively, a stable organic-inorganic hybrid network is constructed, synergistic improvement of reinforcement, toughening and long-acting antibiosis is achieved, and the technical problems that functional particles are not uniform in dispersion, interface bonding is weak, and antibacterial components are prone to migration are effectively solved.

The invention discloses an inorganic normal-temperature rapid-hardening coal-rock mass reinforcing and filling material, and relates to the technical field of mine reinforcement. The material comprises a liquid A and a liquid B, the liquid A is prepared from cement, fly ash, magnetic nano silicon dioxide, citric acid and a layered bimetal oxide-sodium hexametaphosphate compound; and the liquid B comprises water glass, superfine limestone and water. During use, the liquid A and the liquid B are mixed according to the volume ratio of 1: 1 and injected into a target area, and a 1.5 Tesla magnetic field is applied at the initial stage of grouting until the grout is initially set. Through the synergistic effect of the compound protection dispersing agent, the magnetic particles and an external magnetic field, the technical problems that an existing material is unstable in performance due to temperature change, nanoparticles are prone to agglomeration, and magnetic response is attenuated in an alkaline environment are effectively solved; the technical effects of rapid solidification, high strength and excellent durability in high-temperature, low-temperature and complex mine environments are achieved.

The invention discloses a solid ultrasonic gel patch as well as a preparation method and application thereof, and belongs to the technical field of medical chemistry. The solid ultrasonic gel patch is prepared from an acrylamide monomer, polyvinyl alcohol, sodium polyacrylate, sodium carboxymethyl cellulose, nano silicon dioxide, propylene glycol, glycerol, acrylic acid, triethanolamine, a cross-linking agent, an initiator and water according to a specific ratio. The prepared solid ultrasonic gel patch is highly matched with human soft tissue in acoustic impedance (about 1.62-1.63 * 10 < 6 > Pa.s / m), low in acoustic attenuation coefficient (less than or equal to 0.034 dB / (cm.MHz)), moderate in skin adhesion, excellent in flexibility and moisture retention, capable of solving the problems that a traditional ultrasonic coupling agent is inconvenient to use, easy to dry, poor in experience and the like, and suitable for acoustic wave conduction in ultrasonic examination and treatment.

The invention discloses a PVDC (polyvinyl dichloride) coating high-brightness BOPP (biaxially-oriented polypropylene) cigarette film and a preparation method thereof, and belongs to the technical field of packaging materials. The smoke film comprises a BOPP (biaxially-oriented polypropylene) base material layer and three layers of gradient PVDC (polyvinyl dichloride) coatings coated on the surface of the BOPP base material layer, wherein the three layers of gradient PVDC coatings sequentially comprise a bottom adhesive layer, a middle barrier layer and a surface functional layer from bottom to top. The bottom adhesive layer adopts PVDC emulsion and an organic silane coupling agent KH-560, so that the binding force with a base material is enhanced; the middle barrier layer adopts high-molecular-weight PVDC and nano silicon dioxide to form a maze effect to provide main barrier performance; and the surface functional layer adopts PVDC, an acrylate copolymer and an antistatic agent, so that the glossiness and the processability are improved. The preparation method adopts an ultrasonic-assisted coating technology, an electrostatic field-assisted leveling technology, a four-stage drying technology and a dynamic tension compensation technology. The prepared product coating is uniform, compact and free of defects, the oxygen permeability is as low as 4.8-9.2 cubic centimeters per square meter per 24 hours per standard atmospheric pressure, the glossiness reaches 86-95 GU, a traditional double-layer packaging structure can be directly replaced, and the cost is reduced by 20% or above.

The invention discloses a water-based poly-ceramic coating material as well as a preparation method and application thereof. The formula comprises a composite base material (40-45 parts of modified waterborne polyurethane resin and 15-20 parts of a waterborne acrylic emulsion), a synergistic curing system (10-12 parts of a blocked isocyanate curing agent and 0.8-1.2 parts of a latent organic zinc salt accelerant), an organic-inorganic reinforced phase (10-15 parts of nano silicon dioxide and 8-10 parts of polysilazane) and a functional aid. The base material and the cosolvent cooperate to make VOCs less than or equal to 30 g / L, a curing system cooperates to realize low-temperature rapid curing, organic-inorganic components cooperate to form a poly-ceramic structure, the coating is adaptive to an existing roll aluminum production line, and the problems of environmental protection, energy conservation and performance of a traditional coating are solved.

The preparation method comprises the following steps: mixing and stirring polyvinyl alcohol and deionized water, cooling, adding glycerol and hyaluronic acid, stirring, adjusting the pH value to be acidic, cooling, adding a modified additive, stirring, injecting into a mold, repeatedly freezing and thawing, and carrying out vacuum drying to obtain the anti-wrinkle and anti-aging polymer hydrogel mask. In the using process of the hydrogel mask, when the internal modified additive makes contact with the skin surface, due to the weak acidity of the skin, an iron organic frame structure on the surface of the modified additive is attacked by hydrogen ions, coordinate bonds of the modified additive are damaged, and a skeleton is partially or completely dissociated; the active substances can be slowly released under the action of the modified additive, advanced oxidation caused by too fast release of the active substances is prevented, and the modified additive also contains a nano silicon dioxide structure, so that the mask has certain air permeability, the strength, elasticity and toughness of the mask are improved, and the mask cloth is prevented from being easily torn.

The invention discloses a modified nano silicon dioxide / modified nano graphene hybrid material as well as a preparation method and application thereof.The modified nano silicon dioxide / modified nano graphene hybrid material is obtained by putting nano silicon dioxide modified by an epoxy silane coupling agent into nano graphene modified by tannic acid, stirring and drying. Through hydrogen bond assembly between tannic acid modified nano-graphene and gamma-epoxypropoxy propyl trimethoxy silane agent modified nano-silica, a modified nano-silica and nano-graphene hybrid with good dispersibility and strong interfacial interaction is prepared, and the hybrid material can be applied to water-based drilling fluid.

The invention discloses a graphene aerogel modified elastic graphite material and a preparation method thereof, and the graphene aerogel modified elastic graphite material comprises the following components by mass: 50-80 parts of crystalline flake graphite; 8 to 15 parts of graphene aerogel; 3 to 8 parts of aminated modified boron-doped carbon nanotubes; 2 to 6 parts of hydroxyapatite-cerium oxide composite nano particles; 1 to 4 parts of a polyimide-montmorillonite nano composite material; 0.5 to 3 parts of titanate coupling agent modified nano silicon dioxide; 1-3 parts of a dispersant; 2-5 parts of a binder; the amination modified boron-doped carbon nanotubes can enhance the electrical conductivity and interface bonding force of the material, the hydroxyapatite-cerium oxide composite nanoparticles improve the high-temperature stability and mechanical toughness of the material, and the polyimide-montmorillonite nanocomposite improves the corrosion resistance and resilience durability of the material. And the titanate coupling agent modified nano silicon dioxide further optimizes the dispersion uniformity of all the components, and the comprehensive performance of the material is remarkably improved.

The invention provides a post-added nanocellulose enhancing auxiliary agent for latex paint coating and a preparation method and a use method thereof, and the preparation method comprises the following steps: mixing, stirring and heating butanetetracarboxylic acid, sodium hypophosphite and a nanocellulose solution to obtain an esterified nanocellulose solution; adding a silane coupling agent solution into the esterified nanocellulose solution to obtain a modified nanocellulose solution; dispersing nano silicon dioxide into absolute ethyl alcohol to obtain silicon dioxide dispersion liquid; adding a silane coupling agent solution into the silicon dioxide dispersion liquid, mixing, stirring and heating for reaction to obtain modified silicon dioxide powder; dispersing the modified silicon dioxide powder into absolute ethyl alcohol to obtain modified silicon dioxide dispersion liquid; adding the compound emulsifier solution into the modified silicon dioxide dispersion liquid, and shearing and emulsifying to obtain modified silicon dioxide emulsion; and adding a compatilizer into the modified nano cellulose solution, dropwise adding the modified silicon dioxide emulsion, and finally adjusting the viscosity.

The invention relates to the technical field of adhesives, and provides a high-thermal-conductivity modified silane polyether adhesive and a preparation method thereof.The silane-terminated polyether sealant is prepared from silane modified polyether resin, modified filler, a flame retardant, a silane coupling agent, a catalyst, an antioxidant and a water removal agent; the modified filler is obtained by grafting a hydroxylated AlN filler or a hydroxylated BN filler or a hydroxylated AlN and hydroxylated BN compound filler with silane under the catalysis of a weak acid to form a Si-O-Al or / and Si-O-B covalent bond network, and then mixing the Si-O-Al or / and Si-O-B covalent bond network with nano silicon dioxide particles of which the surfaces are coated with polydopamine. Through a multi-dimensional filler modification technology and reasonable matching of other auxiliaries, the problem of synergism of heat conduction, flame retardance and mechanical properties of the MS adhesive under a high filling system is solved, and the material is suitable for a new energy power battery module.

The invention belongs to the technical field of UV ink formula design and digital printing application, and particularly relates to scratch-resistant UV ink, a preparation method thereof and application of the scratch-resistant UV ink to digital printing. The scratch-resistant UV ink comprises the following raw materials in parts by weight: 15-25 parts of epoxy acrylate; 10 to 20 parts of polyurethane acrylate; 15 to 25 parts of a bifunctional monomer; 5-10 parts of a monomer with three functional groups and more than three functional groups; 3 to 5 parts of an alpha-hydroxy ketone photoinitiator; 2 to 4 parts of an acyl phosphorus oxide photoinitiator; 2 to 5 parts of organically modified nano silicon dioxide; 0.1 part to 0.5 part of a flatting agent; 0.5 to 1.5 parts of a dispersing agent; 10 to 15 parts of pigment; the bifunctional monomer is tripropylene glycol diacrylate; the monomer with three functional groups and more than three functional groups is trimethylolpropane triacrylate. The ink has pencil hardness greater than or equal to 3H and excellent flexibility, the adhesive force on substrates such as PC, PET, metal and the like reaches 0 level, the printing process is simplified, and the ink is suitable for digital printing in various scenes.

The invention relates to the technical field of building curtain walls, in particular to an energy-saving building curtain wall which comprises a composite glass unit, dynamic ventilation subsystems are arranged on the left side and the right side of the composite glass unit, and the composite glass unit is electrically connected with an intelligent control module. The composite glass unit comprises a tempered photovoltaic glass layer, the tempered photovoltaic glass layer is located on the outermost layer in the composite glass unit, an antireflection coating is arranged on the outer surface of the tempered photovoltaic glass layer, and conductive silver grid lines are printed on the inner surface of the tempered photovoltaic glass layer; according to the invention, through integration of photovoltaic power generation, intelligent ventilation and dynamic heat insulation technologies, a remarkable energy-saving effect and multifunctional optimization are realized, the system adopts combination of the tempered photovoltaic glass layer and the conductive silver grid lines, the photoelectric conversion efficiency is improved by 3.2%, and the annual energy output reaches 58kWh / m; the variable-spacing hollow layer is matched with the nano silicon dioxide aerogel particles and the electrostatic electret net, so that the heat transfer coefficient is intelligently adjusted within the range of 0.7-1.1 W / (m.K).

The invention relates to the technical field of petroleum drilling engineering, and particularly discloses a drilling plugging agent as well as a preparation method and application thereof. According to the plugging agent, nano silicon dioxide and graphene oxide serve as a composite matrix, and the well drilling plugging agent with excellent dispersion stability, compact plugging performance, temperature resistance, salt resistance and reservoir friendliness is obtained through silane coupling agent graft modification and polymer copolymerization composite modification. The technical defects that an existing nano plugging agent is prone to agglomeration, poor in compatibility with drilling fluid, insufficient in extreme working condition resistance and the like are overcome, the preparation process is simple and controllable, the cost is relatively low, the plugging agent can be added into water-based or oil-based drilling fluid according to the mass ratio of 0.5-5%, the plugging agent is suitable for shale, deep high-temperature high-pressure high-salt complex stratums and the like, a compact plugging layer can be formed, and the plugging effect is good. Shale micro-cracks and deep stratum large cracks are effectively blocked, and the problems that a traditional blocking agent is prone to agglomeration, poor in extreme working condition resistance and the like are solved.

The invention relates to the technical field of foaming materials, in particular to a shoe material preparation process for finished shoes based on supercritical physical foaming and the finished shoes. The preparation method comprises the following steps: 1) weighing a matrix, octadecyl polyhedral oligomeric silsesquioxane, an active group-containing styrene-acrylonitrile copolymer, a polydimethylsiloxane block copolymer, an epoxy functional group-containing olefin copolymer, a nano silicon dioxide dispersion and a processing aid, uniformly mixing, blending, extruding, granulating and drying to obtain a blended material, wherein the matrix, the octadecyl polyhedral oligomeric silsesquioxane, the active group-containing styrene-acrylonitrile copolymer, the polydimethylsiloxane block copolymer, the epoxy functional group-containing olefin copolymer, the nano silicon dioxide dispersion and the processing aid are mixed uniformly; the preparation method comprises the following steps of (1) preparing a polymer, (2) plasticizing the blended material to form a preformed blank, injecting supercritical gas, and fully dissolving the supercritical fluid in the polymer at the temperature of 150-180 DEG C and the pressure of 10-20MPa for 1-3 hours, (3) reducing the pressure to normal pressure within 10 seconds at the pressure reduction rate of less than or equal to 2MPa / s, and (4) cooling and shaping at the temperature of 60-80 DEG C to obtain the shoe material.