374 results about "Silanization" patented technology

The invention relates to the technical field of concrete preparation, in particular to high-performance self-compacting concrete and a preparation method thereof, solves the defects in the prior art, and comprises the following components: cement, fly ash, slag powder, graphene oxide, nano-silica aerogel, a water reducer and an air entraining agent. Through silanization modification and magnetic field induction, the problem of interface incompatibility of GO and SA is solved. Graded mass transfer paths are formed between nano layers of GO and mesopores and macropores of SA. And the CaCO3 seed crystal in the SA hole directionally guides the oriented growth of the C-S-H gel, so that the early strength development rate is increased.

The invention discloses reflection-heat insulation dual-functional aluminum oxide ceramic and a preparation method and application thereof.The method comprises the steps that after surface silanization treatment is conducted on nanoscale hollow oxide filler, surface-modified nanoscale hollow oxide filler is prepared; and then adding the surface-modified nanoscale hollow oxide filler into a high-molecular polymer and a mixed polar solvent to obtain the thermal insulation coating. The method comprises the following steps: coating the surface of aluminum oxide ceramic with a heat insulation coating to form a primary coating, and carrying out gradient heating curing to obtain aluminum oxide ceramic with a functionalized heat insulation coating; and coating the surface of the thermal insulation coating functionalized aluminum oxide ceramic with an infrared reflection coating, and carrying out annealing treatment in a nitrogen atmosphere to prepare the reflection-thermal insulation dual-functionalized aluminum oxide ceramic. By constructing a double-layer composite structure, enhancing interface thermal resistance through chemical bonding, directionally distributing the nanofiller and designing a low-radiation layer structure, heat conduction and radiation heat transfer of the aluminum oxide ceramic-based material are synergistically reduced, and the high-temperature heat insulation performance of the aluminum oxide ceramic-based material is improved.

The invention relates to the technical field of oil-displacing agents, and particularly discloses a targeted nano oil-displacing agent and a preparation method thereof. A preparation method of a targeted nano oil displacement agent comprises the following steps: S1, dispersing 10-30 parts by mass of silanized inorganic nanoparticles in an alcoholic solution, adding 5-12 parts by mass of a functional monomer, 8-20 parts by mass of a hydrophilic monomer and 5-15 parts by mass of a hydrophobic monomer in an inert atmosphere, uniformly mixing, heating to 75-85 DEG C, adding an initiator, carrying out a constant temperature reaction for 4-6 h, and cooling to obtain a pre-grafted nanoparticle dispersion liquid; s2, mixing the pre-grafted nanoparticle dispersion liquid with a composite surfactant, adjusting the pH value to 6.5-7.5, and mixing at 30-40 DEG C for 22-26 hours to obtain the targeted nano oil displacement agent, the targeting type nano oil displacement agent prepared by the invention can still keep excellent dispersion stability and ultralow interfacial tension under the condition of a high-salt oil reservoir, so that the oil displacement efficiency is remarkably improved.

The preparation method comprises the following steps: obtaining a ZnO nano-particle seed crystal layer by a dip-coating-calcining method, and growing the ZnO nano-particle seed crystal layer on a porous ceramic membrane; inducing growth of ZnO nano-clusters on the surface of the ceramic membrane on which the ZnO nano-particles grow and in pore channels of the ceramic membrane through a hydrothermal reaction; and finally, soaking the ceramic membrane on which the ZnO nano-cluster grows in an n-octyltriethoxysilane-absolute ethyl alcohol solution, and carrying out silane chemical grafting treatment. A firm micro-nano composite multilevel structure is obtained on the surface and in pore channels of the ceramic membrane after modification through the method, meanwhile, the surface free energy of the surface and pore channels of the ceramic membrane is reduced through n-octyltriethoxysilane, the surface and the pore channels of the ceramic membrane have super-hydrophobic performance, and the preparation method is simple in preparation process, short in period and suitable for industrial production. And the universality is high.

The invention discloses high-thermal-conductivity carbon black and a preparation method and application thereof, and relates to the technical field of carbon black modification.The preparation method of the high-thermal-conductivity carbon black comprises the following steps that carbon black is subjected to oxidation treatment, silanization treatment and tannic acid coating treatment, and modified carbon black is obtained; preparing a graphene / boron nitride / modified carbon black multi-dimensional filler; carrying out primary modification on the graphene / boron nitride / modified carbon black multi-dimensional filler by adopting lignin, polyvinylpyrrolidone and samarium chloride, and then carrying out secondary modification by adopting 6-aminocaproic acid to obtain the high-thermal-conductivity carbon black. The high-thermal-conductivity carbon black prepared by the invention not only has good dispersity, but also can well improve the thermal conductivity and mechanical properties of a rubber matrix.

The invention relates to a special cable sheath material for trucks and a preparation method thereof, and belongs to the technical field of cable sheath materials, the special cable sheath material comprises the following raw materials: 40-55 parts of polyvinyl chloride, 15-20 parts of high vinyl polybutadiene rubber, 12-16 parts of a modified reinforcing material, 0.5-1.5 parts of a stabilizer, 1-3 parts of an anti-aging agent, 2-4 parts of a compatilizer and 4-8 parts of a filler; according to the technical scheme, the plant-based compound is combined with caffeic acid, epoxidation is performed, and the composite plasticizer is obtained; the composite plasticizer is combined with the silanized graphene oxide to obtain a reinforcing material; combining the reinforcing material with an amino compound to obtain a modified reinforcing material; mixing polyvinyl chloride, high vinyl polybutadiene rubber, the modified reinforcing material, a stabilizer, an anti-aging agent, a compatilizer and a filler, and performing extrusion granulation to obtain the special cable protective sleeve material for the truck. The mechanical property, the corrosion resistance and the aging resistance of the protective sleeve are integrally improved, and the environmental protection property is good.

The invention relates to a preparation method of a high-thermal-conductivity hexagonal boron nitride film in the technical field of new materials, which comprises the following steps: acquiring particle size distribution data of hexagonal boron nitride powder treated by silane, and measuring the distribution condition of hexagonal boron nitride particles with different particle sizes by a particle size analyzer to obtain a particle size distribution curve; the influence of key process parameters on the heat-conducting property, the mechanical strength and the flame-retardant property is verified through experiments, performance data under different process parameters are obtained, and the influence rule of silanization treatment conditions on the surface property of hexagonal boron nitride and the performance of the composite material is focused on; and according to the heat-conducting property, the mechanical strength and the flame-retardant property data, optimizing process parameters by adopting a particle swarm optimization algorithm in a multi-objective optimization algorithm to obtain an optimal process parameter combination.

The invention relates to blue high borosilicate glass and a preparation method thereof, and belongs to the technical field of glass manufacturing, and the blue high borosilicate glass comprises the following raw materials in parts by weight: 50-60 parts of silicon dioxide, 10-15 parts of boron oxide, 2-3 parts of aluminum oxide, 6-8 parts of alkali metal oxide, 3-4 parts of a compound clarifying agent and 1-3 parts of a modified coloring agent. According to the technical scheme, the cobalt blue pigment is coated with mesoporous silica, and the composite material is obtained; combining the composite material with a silane coupling agent to obtain a silanized composite material; combining the silanized composite material with boric acid ester to obtain a modified coloring agent; the prepared modified coloring agent enables the high borosilicate glass to have remarkable blue color and to be stable in color and not prone to volatilization under high-temperature and high-pressure conditions, the added composite clarifying agent is formed by mixing cerium dioxide, sodium sulfate and tin oxide, the clarity of the glass is improved, volatilization of boron is effectively reduced, and the service life of the glass is prolonged. The mechanical property and the stability of the high borosilicate glass are generally improved, and the quality of the glass is improved.

The invention discloses a wide-temperature energy storage aerogel / polymer composite material and a preparation method thereof.The preparation method comprises the steps that oxide aerogel with a three-dimensional skeleton structure is subjected to silanization treatment to obtain hydrophobic oxide aerogel, then the hydrophobic oxide aerogel is dispersed into a solvent to obtain dispersion liquid, and then the dispersion liquid is subjected to ultrasonic treatment to obtain the wide-temperature energy storage aerogel / polymer composite material. The preparation method comprises the following steps: sequentially adding a diamine monomer and an anhydride monomer into a dispersion liquid, reacting under stirring to obtain a polyamide acid precursor solution dispersed with hydrophobic oxide aerogel, carrying out film casting on the polyamide acid precursor solution to obtain a dry film, and carrying out imidization treatment on the dry film to obtain the aerogel / polymer composite material. The obtained aerogel / polymer composite material can still maintain high energy storage performance and stability even at extreme ambient temperature.

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 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 optical films, and discloses a PET-based composite optical film and a preparation method thereof.The optical film is prepared from 100 parts of PET master batch, 5-10 parts of anti-blue-light nanofiller and 1-3 parts of interfacial compatibilizer through melt extrusion, asynchronous two-way stretching, online anti-fingerprint coating liquid coating and cooling and rolling; the blue-light-resistant nano filler is a core-shell structure filler prepared by taking KH570 silanized nano cerium oxide as a core, polymerizing by grafting glycidyl methacrylate to form a shell layer, and then reacting with 1H-benzotriazole-1-methanol. The anti-fingerprint coating liquid is prepared from perfluoropolyether modified siloxane acrylate and nano silicon dioxide sol. Through core-shell filler design and functional coating online coating, the technical problems that inorganic nanoparticles are easy to agglomerate and organic small molecule auxiliary agents are easy to migrate are synergistically solved, and the obtained optical film has excellent properties of high light transmittance, low haze, efficient blue light resistance and lasting fingerprint resistance and is good in durability.

The invention relates to a heat-conducting insulating cable material and a preparation method thereof, and belongs to the technical field of cable materials, the heat-conducting insulating cable material comprises the following raw materials: 50-60 parts of polypropylene, 25-30 parts of SEBS, 12-18 parts of a modified heat-conducting insulating material, 2-4 parts of a plasticizer, 6-8 parts of an antioxidant, 3-4 parts of a lubricant and 7-10 parts of a reinforcing filler; according to the technical scheme, modified hydroxylated boron nitride is combined with organic intercalated montmorillonite, then a silane coupling agent is grafted, and a silanization reinforced material is obtained; combining the silanization reinforcing material with a branched functional monomer to obtain an amino-terminated hyperbranched composite material; combining the amino-terminated hyperbranched composite material with an interface modifier to obtain a modified heat-conducting insulating material; mixing polypropylene, SEBS, the modified heat-conducting insulating material, a plasticizer, an antioxidant, a lubricant and a reinforcing filler, and performing extrusion granulation to obtain the heat-conducting insulating cable material. The mechanical property, the heat-conducting property and the insulating property of the cable material are improved.

A hydroxylation solvent and a coupling agent are used for treating hollow glass beads to obtain silanized hollow glass beads, a conductive polymer monomer and an oxidizing agent are introduced, the conductive polymer monomer is excited to generate a polymerization reaction through the strong oxidation effect of the oxidizing agent to generate a conductive polymer, and the modified hollow glass beads are obtained. The conductive polymer and the surface functional groups of the silanized hollow glass beads are combined together in situ under the interaction of the conductive polymer and the silanized hollow glass beads to form the modified hollow glass beads. The conductive polymer with corrosion resistance grows on the hollow glass beads in situ through an in-situ polymerization method, so that the modified hollow glass beads are prepared, the problem of inherent internal defects of pure epoxy resin is solved, the compatibility of the beads and the epoxy resin is enhanced, the beads can be uniformly dispersed in matrix resin, and the corrosion resistance of the hollow glass beads is improved. A good interface layer is formed, and the anti-corrosion effect of the conductive polymer and the heat preservation effect of the hollow glass beads are fully exerted.

The invention provides a modified silica sol binder and a preparation method and application thereof, and relates to the technical field of binders.The preparation method comprises the following steps that a silane coupling agent and silica sol are mixed to react, and silanized silica sol is obtained; and mixing a molecular sieve with the silanized silica sol to obtain the modified silica sol binder. The silane coupling agent has amphipathy and is well combined with the surfaces of silica sol particles through chemical bonds, the silica sol has amphipathy after the silane coupling agent is mixed with the silica sol, the coating performance of the silica sol on refractory powder can be improved, the wettability of slurry on a wax mold can be improved, the size deviation of a mold shell is reduced, and the flatness of a surface layer is improved; therefore, cracks are reduced; no heteroatom is introduced into the cage structure of the molecular sieve in the process of introducing an Al-O-Si bond, and the molecular sieve has abundant pore channels and can be well staggered with a silica sol network structure in the high-temperature sintering process, so that the bonding strength of the silica sol binder is improved.

The present invention relates to a device consisting of a glass container, the inner walls of which have been modified after successive activation, silanisation and amidation reactions to house a porous crystalline coating. Said coating, which has the atomic sequence —Si—O—R-M-MOF, is covalently bonded to the inner wall of the container in an inverted radial manner, where R may be A) —Si—(CH2)3—NH—CH(═O)—(C6H4)—COO—; B) —Si—(CH2)n—NH—CH(═O)—(CH2)2—(C2HN3)—(CH2)n—(C6H4)—COO—; C) —Si—(CH2)n—O—CH2—CH(—OH)—CH2—NH—(CH2)n—(C6H4)—COO—; D) —Si—(CH2)n—S—(CH2)2—(CH2)n—(C6H4)—COO—, and M is a metal dependent on the type of MOF. The container can be used for the extraction and pre-concentration of analytes present in samples of different natures, from environmental to biological. The invention also relates to the use thereof for dosing medicines or for colouring or flavouring beverages.

The invention relates to the technical field of coatings, in particular to a bio-based polyurethane waterproof coating and a preparation method thereof. The coating is prepared from organic fluorine-silicon cross-linked castor oil, dibutyltin dilaurate, an HDI tripolymer, polytetrahydrofuran ether glycol, 1, 4-butanediol, a filler, a plasticizer and an ultraviolet light absorber, and the organic fluorine-silicon cross-linked castor oil is obtained by silanization modification of methyl ricinoleate and hydrolysis cross-linking of fluorine-containing silane. The preparation method is simple, and the material has excellent performance, is suitable for the fields of building waterproofing, weather-resistant coatings and the like, and has wide application potential and market value.

The invention discloses a weather-resistant heat-insulation waterproof coating for an outer wall and a preparation method of the weather-resistant heat-insulation waterproof coating. The waterproof coating comprises the following components in parts by weight: 27-35 parts of modified acrylate polymer emulsion, 35-50 parts of composite filler, 5-10 parts of a curing system, 4-8 parts of a coalescing agent, 0.1-0.5 part of a defoaming agent, 0.3-0.8 part of a flatting agent, 0.2-0.6 part of a mildew preventive, 0.5-1.0 part of a thickening agent and 1-5 parts of a pH regulator, the modified acrylate polymer emulsion is prepared by carrying out pretreatment and silanization modification on cardanol and then carrying out monomer pre-emulsification and free radical polymerization. According to the waterproof coating provided by the invention, a Si-O-C network and a hindered amine free radical capture system are introduced, so that the weather resistance is improved; fluoride-nano silicon dioxide is used for constructing a roughness-low surface energy synergistic waterproof interface; acid-washed fly ash floating beads, silicon dioxide aerogel and expanded perlite filler are compounded to form multiple heat conduction scattering paths so as to realize cross-scale porous filler heat preservation; the waterproof coating can serve in complex environments with large temperature difference fluctuation, acid rain and the like.

The invention relates to a chemically curable composition, comprising - at least one chemically curable matrix; - more than 70 wt.-%, based on the total composition, of at least one thermally conductive filler; - optionally additives, in particular selected from curing catalysts, accelerators, plasticizers, organosilanes, stabilizers, and colorants; characterized in that said thermally conductive filler is surface-coated by silanzation using a mixture of at least one organosilane OS1 according to R1-Si(OR3)3 and at least one organosilane OS2 according to R2-Si(OR3)3, wherein R1 is a linear or branched C2 to C20 alkyl or alkenyl group optionally having cyclic and / or aromatic moieties, and wherein R2 is a polyether group, and wherein R3 is a methyl or ethyl group, with the provisio that the mass ratio of organosilane OS1 and organosilane OS2 employed for the surface silanization coating is between 1:2 and 2:1, preferably between 1:1.5 and 1.5:1, in particular between 1:1.1 and 1.1:1. The chemically curable composition shows low viscosity and improved applicability alongside with exceptionally high filler levels and thus excellent thermal conductivity and is particularly suitable as adhesive, gap filler, or sealant suitable for e-coat applications and battery bonding especially in electric automobile battery assembly.

The invention relates to the technical field of electrolytic copper foil processing, and particularly provides an ultra-low profile RTF copper foil surface treatment process which comprises the following steps of acid pickling, coarsening, curing, ashing, passivation, anti-oxidation, silanization and drying, and a coarsening additive is one or a mixture of two of NaWO4, NaMoO4, D-sodium gluconate and trisodium citrate. Through alternate circulation of multiple roughening and curing processes, the bonding force between crystal grains and the surface of the copper foil is remarkably enhanced, the copper powder falling phenomenon is thoroughly eliminated, and the anti-stripping strength is higher; the reverse copper foil prepared by the production process provided by the invention has ultra-low profile tolerance, the roughened surface Rz is less than or equal to 1.8 mu m, and the peel strength is more than or equal to 0.5 N / mm. The roughness is reduced on the basis of maintaining the peel strength of the copper foil, so that the obtained electrolytic copper foil is more beneficial to high-frequency signal transmission, and the applicability is wider.

The invention discloses a preparation method of a high-strength corrosion-resistant PVDF-based composite material, and belongs to the technical field of composite materials. The method mainly comprises the following steps: (1) preparing surface nanocrystallization carbon fibers with SiO2 nano layers on the surfaces through alkali liquor activation, silanization and in-situ growth processes; (2) preparing fluorine-containing modified graphene oxide; (3) mixing the filler with PVDF resin, introducing a VDF monomer for in-situ polymerization, and constructing a chemical bonding interface; (4) respectively preparing outer layer slurry rich in nano TiO2, middle layer slurry rich in surface nanocrystallization carbon fibers and inner layer slurry rich in SiO2 coated Al2O3 core-shell nanoparticles by quantitatively supplementing specific filler; and (5) carrying out gradient tape casting, segmented drying, hot press molding and annealing treatment to prepare the composite material. The problems that a traditional PVDF material is weak in interface bonding and corrosion resistance and strength are difficult to consider at the same time are solved, and the prepared material has excellent mechanical strength and strong acid corrosion resistance.

The invention discloses a preparation method and application of an oil-water separation film, and belongs to the technical field of oil-water separation.The preparation method comprises the following steps that 1, tetrabutyl titanate is subjected to hydrolytic annealing treatment, and titanium dioxide nanoparticles with the surfaces rich in hydroxyl are obtained; step 2, modifying the titanium dioxide nano-particles rich in hydroxyl groups to obtain silanized titanium dioxide nano-particles; 3, the silanized titanium dioxide nanoparticles are placed in a mixed solvent, ultrasonic dispersion is carried out for 10 min, a homogeneous precursor solution is obtained, polylactic acid is added, stirring dispersion is carried out until the solution is transparent, a spinning solution is obtained, electrostatic spinning is carried out on the spinning solution, and the oil-water separation film is obtained.The obtained oil-water separation film has the excellent oil-water separation characteristic. In addition, the oil-water separation membrane can effectively purify oil-containing wastewater, and can be naturally degraded after the service life is ended, so that the negative influence on the environment is reduced to the greatest extent.

According to the high-temperature-resistant tracking master batch provided by the invention, a composite structure is adopted, and the matrix layer is composed of the high-temperature-resistant engineering plastic and the inorganic reinforcing agent and has high temperature resistance and mechanical strength; the functional layer is a tracking unit dispersed in the matrix layer and comprises magnetic nanoparticles and a rare earth fluorescent material, and the interface bonding strength is improved through silanization treatment; the protective layer is a microcapsule formed by coating the tracking unit through a sol-gel method, the thermal expansion coefficient difference between the protective layer and the matrix is less than or equal to 10%, and the rupture rate during melt blending at 320 DEG C is less than or equal to 2%. The preparation method of the tracking master batch comprises the steps of high-temperature extrusion and water-cooling pelletizing. The fluorescence intensity attenuation rate of the tracking master batch is smaller than or equal to 5% at the temperature of 300 DEG C, and the tracking master batch is suitable for full-life-cycle tracking of engineering plastics.

The invention belongs to the technical field of anti-corrosion pipelines, and particularly relates to an outer 3PE inner epoxy resin anti-corrosion pipeline and a production process thereof. Medium-frequency preheating; performing internal and external shot blasting to remove rust; carrying out silanization nanoparticle suspension liquid treatment; internal corrosion prevention; epoxy powder coating is sprayed on the outer surface of the steel pipe through an electrostatic spraying technology to form an anti-corrosion bottom layer, and the outer surface of the steel pipe is coated with adhesive and polyethylene to form an adhesive layer and a polyethylene layer. According to the invention, bisphenol A epoxy resin with low molecular weight is selected, and the molten epoxy powder coating has relatively low viscosity and can be fully infiltrated into the bottom of an anchor pattern on the surface of the steel pipe, so that the leveling effect is improved, the leveling time is shortened, and the epoxy resin coating is more uniform; meanwhile, under the promotion of an imidazole group, acid anhydride and bisphenol A epoxy resin are quickly crosslinked and cured to form gel, so that the viscosity of the epoxy powder coating is quickly increased, and sagging is prevented.

The invention belongs to the technical field of polyurethane coatings, and provides a cellulose nanocrystal enhanced heat-insulating bio-based polyurethane coating and a preparation method thereof, according to the coating, porous cellulose nanocrystals are introduced, and a silicon dioxide film is deposited on the surfaces of the porous cellulose nanocrystals, so that the heat-insulating property, weather resistance and mechanical property of the material are remarkably improved. The castor oil adopted as a bio-based raw material has the advantages of being renewable and environmentally friendly, and the defects of a traditional petroleum-based polyurethane material in the aspects of environmental protection and resource consumption are overcome. Through epoxidation treatment on castor oil, the reaction activity and hydroxyl density of the material are increased, and further fluorination and silanization modification are performed, so that the hydrophobicity, chemical stability and surface energy reduction effect of the coating are effectively improved; the prepared bio-based polyurethane coating has excellent mechanical properties, long-acting weather resistance and an excellent heat reflection effect.

The invention discloses a functionalized hybrid flame retardant based on cyclodextrin-MOF (Metal Organic Framework) as well as a preparation method and application thereof, and belongs to the technical field of high polymer material science and flame retardance. The hybrid flame retardant (F-CD-MOF) has a core-shell structure, a core body is crystalline CD-MOF formed by self-assembly of cyclodextrin and potassium ions, and a shell layer is an organic interface layer which is formed by grafting of a silane coupling agent and contains an active functional group (-NH2 or-NCO). The preparation method comprises the steps of CD-MOF primary crystal synthesis, surface silanization functionalization and post-treatment. The flame retardant can be used as a reactive nanofiller for preparing a high-performance flame-retardant polyurea coating, a polyurea three-dimensional cross-linked network is embedded through covalent bonding, the UL-94 flame-retardant grade of the obtained coating reaches V-0 grade, the peak heat release rate is reduced by 40% or above compared with that of a pure polyurea coating, and the flame retardant has excellent mechanical properties and is suitable for industrial production. The fireproof coating is suitable for high-end fireproof fields such as building fireproof coatings and electric power facility fireproof coating materials.

The invention relates to a dental resin-permeable ceramic and a preparation method thereof, the method comprises the following steps: mixing a ceramic material and an adhesive in a solvent, and carrying out dry pressing molding to prepare a ceramic block; wherein the ceramic material comprises barium glass which is not subjected to silanization treatment; sintering the ceramic block to prepare a porous ceramic green body; carrying out silanization treatment on the porous ceramic green body to prepare a modified porous ceramic green body; soaking the porous ceramic green body in an acrylic monomer resin mixture containing an initiator, and performing warm isostatic pressing for permeation; and curing the resin-permeated ceramic green body in a resin matrix which does not contain an initiator to prepare the resin-permeated ceramic. The method is simple in process and less in time consumption, and the resin permeable ceramic material with higher mechanical property can be prepared.

The invention is suitable for the technical field of hygroscopic materials, and provides a hygroscopic material based on a polymer film and a preparation method and application thereof. The hygroscopic material is based on a polymer film, an activated area is formed on the surface of the polymer film through plasma activation treatment, and then a modified area is formed on the surface of the polymer film through chemical adsorption and silanization reaction; the modified area is used for capturing water vapor and condensing and gathering into liquid drops, and the activated area is used for reducing water drop sliding angle and contact angle lag and promoting liquid drop conveying. The moisture absorption material with a hydrophilic-hydrophobic dual-function (Janus) structure is constructed, efficient moisture absorption and droplet aggregation can be achieved, and the requirement for small-area dehumidification is met; the system realizes dehumidification by virtue of physical and chemical characteristics of the moisture absorption material, and is low in energy consumption, energy-saving and environment-friendly; the optimized dehumidification process ensures that the moisture absorption material is recycled for multiple times without reducing the performance, the service life of equipment is effectively prolonged, and the maintenance frequency is reduced; the system adopts a miniaturized design, and is suitable for distributed and small-area application.

The invention discloses an anti-cracking calcium silicate board and a preparation method thereof, and relates to the technical field of light building materials. The method comprises the following steps: carrying out ball milling, acid pickling and silane coupling agent surface modification on quartz sand to obtain alkylated quartz sand; and carrying out dry mixing on the mixture, metakaolin, silica fume and cement. The linen fiber is subjected to alkali treatment and hydroxyethyl acrylate graft modification, and the PVA fiber is subjected to silane coupling agent and nano silicon dioxide coating treatment. Dispersing graphene oxide, carboxylated styrene-butadiene emulsion and other assistants in water, adding the dry mixture, uniformly stirring, and then adding the two modified fibers to prepare mixed slurry; and finally, carrying out pressure forming, pre-curing, high-pressure steam curing and drying to obtain a finished product. Through substrate silanization, fiber grafting / nanocrystalline seed modification and synergistic introduction of graphene oxide and elastic emulsion, the interface bonding strength and toughness are remarkably enhanced, crack initiation and propagation are effectively inhibited, and the plate has excellent cracking resistance.

The invention relates to the technical field of polymer composite materials, in particular to a corrosion-resistant composite material for a pin insulator wire fixing device and a preparation method of the corrosion-resistant composite material. 5-10 parts of an ethylene-propylene copolymer elastomer; 2 to 4 parts of maleic anhydride grafted polypropylene; 0.5 to 1 part of polyethylene glycol; 3-5 parts of nano silicon dioxide subjected to surface silanization treatment; 5-10 parts of surface modified mica sheets; 0.5 to 2 parts of fluorinated graphene; 0.2 to 0.5 part of a hindered amine light stabilizer; 0.2 to 0.5 part of a hindered phenol antioxidant; 0.2 to 0.4 part of a benzotriazole ultraviolet light absorber; 0.3 to 0.6 part of metal stearate; the corrosion-resistant coating has the advantages that the corrosion medium permeation is effectively blocked, and the corrosion-resistant coating has excellent corrosion resistance under the corrosion medium in acidic, alkaline and salt mist environments.