230 results about "Silicon dioxide nanoparticles" patented technology

The invention relates to a catalyst for ethylene oxide ring-opening polymerization and a preparation method thereof, and belongs to the technical field of high polymer material synthesis, and the catalyst is a composite structure based on a silicon dioxide nanoparticle loaded bimetal organic complex; a modified nitrogen-containing polydentate ligand is prepared by adopting a special method, is coordinated with metal ions through covalent bonds and is loaded on silicon dioxide nanoparticles; by utilizing the high dispersity and stability of the silicon dioxide nanoparticles and the synergistic catalytic effect of the bimetal organic complex, the catalytic effect is effectively improved, the polymerization process is accelerated, the polymerization stability is enhanced, the polymerization molecular weight is improved, and the distribution is narrow.

The invention provides a Janus polylactic acid fiber membrane for cooling and a preparation method of the Janus polylactic acid fiber membrane. The method comprises the following steps: S1, synthesizing silicon dioxide nanoparticles; s2, dissolving silicon dioxide nanoparticles, a surfactant and polylactic acid in an organic solvent to obtain an electrostatic spinning solution A; s3, uniformly dissolving polylactic acid to obtain an electrostatic spinning solution B; s4, preparing an inner layer of the Janus fiber membrane; and S5, preparing the Janus polylactic acid fiber membrane. According to the method disclosed by the invention, the introduction of the silicon dioxide nanoparticles and the spectral selective regulation and control of the fiber diameter enable the polylactic acid fiber membrane to have high infrared emissivity and high sunlight reflection capability, and the wetting gradient of the fiber membrane can be used for rapidly conveying water from the inner layer to the outer layer. The fiber membrane not only has excellent radiation refrigeration effect and rapid moisture absorption and sweat releasing capability, but also has good biocompatibility and degradability, the preparation process is simple, and the fiber membrane is an individual cooling material with wide application prospect.

The invention relates to the technical field of material science and engineering, and discloses a nanocellulose-based oil-water separation and adsorption composite material, which is prepared from the following raw materials in parts by mass: 35 to 45 parts of nanocellulose; 8 to 11 parts of bagasse cellulose; 10 to 15 parts of sodium lignin sulfonate; 4 to 8 parts of chitosan; 5-10 parts of oxidized starch; 5 to 8 parts of cellulose nanowhiskers; 2-5 parts of silicon dioxide nanoparticles; 0.5 to 1 part of calcium carbonate nanoparticles; 1-2 parts of a citric acid cross-linking agent; 1-2 parts of graphene oxide; 0.3 to 0.6 part of ethylene diamine tetraacetic acid; 2-5 parts of glycerol; 0.4 to 1 part of stearoyl chloride; 2-4 parts of nano iron oxide; the preparation method comprises the following steps: pretreating the raw materials, mixing the pretreated raw materials into slurry, carrying out crosslinking and ultrasonic dispersion, standing to obtain a basic mixture, injecting the basic mixture into a mold, carrying out freeze drying to form a photocatalytic layer, carrying out centrifugal dewatering, carrying out chelation reaction, spraying a composite solution, and carrying out vacuum drying to obtain the photocatalytic material. The obtained composite material has the advantages of efficient adsorption capacity, good mechanical properties, environmental friendliness, degradability and low preparation cost.

The invention belongs to the field of nano material preparation, and particularly relates to a preparation method of nanoscale silicon dioxide alcohol-soluble sol. The method comprises the following steps: dissolving a water-soluble polymer in an ammonia water solution, and then adding absolute ethyl alcohol to form a polymer micelle; adding tetraethyl orthosilicate into the micelles, obtaining a nanoscale silicon dioxide nanoparticle mixed solution after the reaction is finished, then dispersing the nanoscale silicon dioxide nanoparticle mixed solution in deionized water through centrifugation, then centrifuging to obtain pure silicon dioxide particles, dispersing the pure silicon dioxide particles in absolute ethyl alcohol, adding a silane coupling agent KH570 at the same time, and performing ultrasonic dispersion to obtain the nanometer silicon dioxide nanoparticles. And carrying out ultrasonic dispersion to obtain the nanoscale silicon dioxide alcohol-soluble sol.

The invention relates to the technical field of organic silicon coatings, in particular to a preparation method of an organic silicon antifouling coating for slowly releasing a lubricant. The preparation method of the organosilicon antifouling coating of the slow-release lubricant comprises the following steps: carrying out emulsion polymerization on silicon dioxide nanoparticles, acryloyloxy alkyl alkoxy silane, fluorine-containing acrylate and lubricating oil in a redox system to obtain a fluorine-silicon modified silicon dioxide nanoparticle emulsion of which the surface is attached with the lubricating oil; and then mixing with organic silicon resin, a coupling agent, a cross-linking agent and a catalyst, and carrying out cross-linking curing to obtain the organic silicon coating. The lubricating oil is adsorbed on the surfaces of the nano particles under the action of grafted functional groups of the functionalized nano particles, so that the lubricating oil is introduced into the organic silicon coating in the form of emulsion particles, micro-nano lubricating oil droplets are formed, long-acting slow release of the lubricating oil is realized, the amphiphobic property and low surface energy of the coating are improved, and the antifouling capacity of the coating is improved; meanwhile, the mechanical property is improved.

The invention relates to the field of cable materials, and discloses a flame-retardant anti-aging cable material and a preparation method thereof.The flame-retardant anti-aging cable material is prepared from, by weight, 45-70 parts of nitrile rubber, 20-40 parts of natural rubber, 7-12 parts of modified carbon nanotubes, 5-10 parts of composite filler, 3-5 parts of nano-zinc oxide, 2-4 parts of stearic acid, 1-3 parts of sulfur and 0.1-0.5 part of accelerant; the modified carbon nano tube is prepared by modifying a flame retardant and p-phenylenediamine on the surface of a carbon nano tube through a chemical reaction; the composite filler is prepared by taking a titanium dioxide nanosheet as a carrier and growing silicon dioxide nanoparticles in situ, and the cable material is endowed with excellent mechanical properties, flame retardance and ageing resistance by adding the modified carbon nanotubes and the composite filler.

The invention relates to the technical field of photoresist, in particular to glass photoresist, a preparation method of the glass photoresist and a femtosecond laser preparation method of an optical fiber end face micro-nano glass structure. The glass photoresist is prepared from acrylic polysilsesquioxane and acrylic ester, glass photoresist is arranged on a preset surface; photocuring equipment is adopted to carry out photocuring on the glass photoresist, so that the glass photoresist forms a cured structure; and performing heat treatment on the cured structure. Compared with the prior art, the glass photoresist different from the traditional silicon dioxide loaded glass photoresist is obtained, the problem that the traditional silicon dioxide additive printing technology is limited by the size of silicon dioxide nanoparticles is solved, and printing of a glass monomer polymerization cross-linked structure with the characteristic size exceeding the diffraction limit is achieved; organic components in the cross-linked precursor are effectively decomposed through heat treatment, and manufacturing of the optical fiber end face integrated high-quality silicon dioxide micro-nano glass is achieved.

The invention relates to the field of waterproof coatings, and discloses a tunnel macromolecular self-cleaning special waterproof coating which comprises polyurethane resin, epoxy resin, fluorosilicone resin, titanium dioxide nanoparticles, zinc oxide nanoparticles, aluminum triphosphate, silicon dioxide nanoparticles, aluminum oxide microparticles, graphene nanosheets, a flexibilizer, a curing accelerator and a solvent. According to the coating, collaborative optimization of functions of all layers is achieved through a multi-layer composite structure, the bottom layer waterproof layer provides efficient waterproofness and weather resistance, the middle reinforcing layer greatly improves the mechanical strength and wear resistance of the coating, the surface layer self-cleaning layer adopts a fluorosilicone resin matrix and introduces super-hydrophobic nano-particles, the surface is endowed with an excellent self-cleaning function, and the self-cleaning effect is good. Dirt adhesion is prevented; and automatic cleaning is facilitated. The coating effectively solves the common problems of leakage, pollution accumulation, abrasion and peeling in a tunnel environment, the protection performance of a coating is remarkably improved, the service life of the coating is remarkably prolonged, and an efficient and lasting protection solution is provided for building structures such as tunnels and subways.

The invention provides a ceramic tile back surface charged bead effect scavenger and a preparation method thereof, and belongs to the technical field of building materials. The scavenging agent comprises the following components in percentage by mass: 0.5-5% of a silane coupling agent, 2-10% of acrylate-vinyl versatate copolymer latex powder, 1-8% of silicon dioxide nanoparticles, 8-20% of an alkaline component, 3-10% of a bio-based surfactant, 1-5% of lipase, 8-20% of an adsorbent and 40-70% of a filler. The remover can effectively remove the bead effect on the back of the ceramic tile, improve the adhesive property of the ceramic tile, improve the durability, especially the adhesive property of the ceramic tile after water immersion and thermal aging, reduce the hollowing phenomenon and prolong the service life of the ceramic tile; the scavenger has the advantages of low formula cost, easily available raw materials, low toxicity, environmental protection, simple and fast use method, improvement of construction efficiency and construction quality, easy operation, cost saving, and enhancement of safety and environmental protection.

The invention discloses a preparation method of a solvent-resistant nanofiltration membrane with a polydopamine / amino silicon dioxide middle layer, belongs to the technical field of membrane separation, and solves the technical problems of low flux and poor stability of the solvent-resistant nanofiltration membrane. The preparation method of the solvent-resistant nanofiltration membrane with the polydopamine / amino silicon dioxide middle layer comprises the following steps: preparing a polyetherimide-based membrane by a phase inversion method-crosslinking method; preparing amino silicon dioxide nanoparticles by adopting a sol-gel method; preparing a deposition solution containing dopamine, an oxidizing agent and amino silicon dioxide by using a Tris buffer solution; depositing the polydopamine / amino silicon dioxide intermediate layer on the upper surface of the polyetherimide base film; carrying out interfacial polymerization reaction of piperazine and trimesoyl chloride on the surface of the membrane deposited with the middle layer, and carrying out heat treatment to obtain a composite membrane; and immersing the composite membrane into an organic solvent for activation to obtain the solvent-resistant nanofiltration membrane with a polydopamine / amino silicon dioxide intermediate layer. The solvent-resistant nanofiltration membrane constructed by taking polyetherimide as a base membrane, polydopamine / amino silicon dioxide as a middle layer and polyamide as a separation layer has excellent flux and stability, and has a wide application prospect in the aspects of drug separation, organic solvent recovery and the like.

The invention relates to the field of material science and mechanical engineering, in particular to a high-strength aluminum-magnesium-silicon material bolt for a new energy automobile and a preparation method of the high-strength aluminum-magnesium-silicon material bolt. The bolt is made of an aluminum-magnesium-silicon alloy, and the alloy contains magnesium, silicon, manganese, iron, chromium, titanium, scandium, rare earth elements and the balance of aluminum. By optimizing the proportion of rare earth elements (yttrium, lanthanum and cerium) and scandium, grains are effectively refined, the tensile strength, the yield strength and the ductility are improved, and meanwhile the corrosion resistance and the fatigue resistance are enhanced. The preparation method comprises the steps that vacuum melting is combined with the ultrasonic-assisted technology, alloy elements are evenly distributed, and then the material structure is optimized through solution treatment at the temperature of 540 DEG C for 1.5 h and aging treatment at the temperature of 160 DEG C for 8 h. And the surface of the bolt is subjected to anodic oxidation and coated with a composite coating containing silicon dioxide nanoparticles, so that the wear resistance and the corrosion resistance are improved. Through verification, the bolt has the excellent performance that the tensile strength is larger than or equal to 490 MPa, the yield strength is larger than or equal to 440 MPa, the ductility is larger than or equal to 8.5%, and the salt spray test time is larger than or equal to 1500 hours, and the fastening requirement of the new energy automobile under the complex working condition is met.

The invention relates to the technical field of fire extinguishing microcapsules, in particular to a high-airtightness perfluorohexanone fire extinguishing microcapsule and a preparation method and application thereof.The perfluorohexanone fire extinguishing microcapsule comprises a composite shell layer and a fire extinguishing core, and the composite shell layer is made of ethylene-vinyl alcohol copolymer resin and silicon dioxide nanoparticles; the fire extinguishing core is a perfluorohexanone fire extinguishing agent and is applied to preparation of indoor fire extinguishing pastes, fireproof coatings and polyurethane adhesive materials. According to the perfluorohexanone fire extinguishing microcapsule disclosed by the invention, the diffusion of low-polarity perfluorohexanone is effectively prevented by utilizing the strong hydrogen-bond interaction between hydroxyl groups in the ethylene-vinyl alcohol copolymer resin, and especially under the condition of relatively high temperature, the perfluorohexanone fire extinguishing microcapsule has a good fire extinguishing effect. The problem that an existing perfluorohexanone fire extinguishing microcapsule is poor in long-term air tightness under the condition of high encapsulation efficiency is effectively solved, and meanwhile harmful substances such as formaldehyde cannot be generated.

The invention relates to the technical field of hydrophobic flame-retardant materials, and discloses a method for preparing a super-hydrophobic flame-retardant flexible material from a water-dispersed nanocellulose compound, which comprises the following steps: preparing a nanocellulose suspension; synthesizing silicon dioxide nanoparticles; preparation of a precursor suspension: mixing SiO2 nanoparticles, methyltrimethoxysilane and the nanocellulose suspension in proportion, and carrying out a reaction to obtain the precursor suspension; preparing a polyvinyl alcohol solution; preparing a water-dispersible plant nano cellulose compound mixed solution, and freezing the water-dispersible plant nano cellulose compound mixed solution; and carrying out freeze drying treatment and heat treatment on the frozen material to obtain the super-hydrophobic flame-retardant flexible material. According to the method for preparing the super-hydrophobic flame-retardant flexible material by adopting the water dispersible nano-cellulose compound, the material preparation process is green and pollution-free, and the prepared flexible material has the characteristics of high elasticity, high oil absorbency, reusability, fire resistance, degradability and the like, and can be applied to various fields.

The invention discloses a composite nanofiltration membrane based on silicon dioxide nanoparticle modification and preparation and application thereof, and belongs to the technical field of separation membrane materials. The preparation method of the composite nanofiltration membrane based on silicon dioxide nanoparticle modification comprises the following steps: S1, providing a mixed solution containing graphene oxide and silicon dioxide nanoparticles; s2, adopting a vacuum filtration method to enable the mixed solution to form a graphene oxide functional layer on a base membrane, and then performing thermal crosslinking treatment to obtain the composite nanofiltration membrane based on silicon dioxide nanoparticle modification. According to the composite nanofiltration membrane, the space between GO sheet layers is filled with SiO2 nano-particles in an intercalation manner, so that the interlayer spacing is enlarged, and the permeation flux is increased; meanwhile, the pore structure of the membrane is regulated, the pore size distribution of the membrane is changed, and the separation performance of the membrane is improved. The structural change optimizes the separation performance of the membrane, thereby enhancing the overall performance of the membrane.

The invention relates to the field of filtering materials, in particular to a filtering material for removing silicon and aluminum from ionic membrane caustic soda brine and a preparation method of the filtering material. The filtering material for removing silicon and aluminum from ionic membrane caustic soda brine comprises a hierarchical porous structure carbon adsorption material, the hierarchical porous structure carbon adsorption material comprises a plurality of large holes with the diameter of 800-1000 nm and a plurality of small holes with the diameter of 50-100 nm, and each small hole is located in the hole wall of the corresponding large hole. According to the invention, polymethyl methacrylate microspheres are used as macroporous templates, silicon dioxide nanoparticles are used as microporous templates, and gaps of the templates are filled with a carbon precursor through impregnation. A three-dimensional communicated macropore and micropore hierarchical structure is constructed by a double-template method, macropores are used as channels for rapid diffusion of silica-alumina colloid, and micropores are distributed on the wall surfaces of the macropores to provide a high specific surface area, so that the density of active sites is remarkably increased; the physical screening effect can selectively intercept target impurities, meanwhile, competitive ions such as calcium and magnesium ions are prevented from entering pore channels, and the dynamic adsorption capacity is remarkably improved compared with traditional activated carbon.

The invention discloses a high-yield gastrodia elata planting method based on Tilia brachypoda fungus material optimization and seed ramie stress resistance activation. According to the high-yield gastrodia elata planting method based on Tilia brachypoda fungus material optimization and seed ramie stress resistance activation, yield increase and quality improvement are achieved through fungus material composite strengthening treatment and a composite strain synergistic inoculation technology. The method comprises the following steps: (1) fermenting a tilia brachypoda substrate by lactobacillus plantarum and soaking in a nano-composite nutrient solution to form a high-activity bacterial material; (2) nitrogen-fixing bacteria, disease-resistant actinomycetes and armillaria mellea are mixed and inoculated according to the proportion of 3: 1: 1, nitrogen supply is improved, and the occurrence rate of black rot is reduced; 3) activating a GASA stress-resistant gene of the seed hemp through a pulsed electric field (5 kV / cm, 10 microseconds), and enabling the germination rate to reach 88.5% in combination with a calcium signal channel strengthening technology; according to the method, the yield per mu of gastrodia elata is increased by 30%-40%, the gastrodin content is increased by 30% or above, the chemical pesticide dosage is reduced by 55%, the strain passage purity is stable, the method is suitable for large-scale planting in multiple climate areas, and an innovative solution is provided for green production of traditional Chinese medicinal materials.

The invention relates to a motor outgoing line technology, and discloses a special material for a motor outgoing line. The polyimide composite material is prepared from the following components in percentage by weight: 50 to 70 percent of polyimide matrix material, 5 to 12 percent of nano-scale low-dielectric-constant filler, 10 to 20 percent of micron-scale reinforcing filler, 3 to 8 percent of conductive filler, 0.5 to 2 percent of interface regulating agent and 1 to 3 percent of processing aid. The invention also provides a preparation method of the special material for the motor outgoing line. The preparation method comprises the following steps: S1, carrying out surface modification on a nanoscale low-dielectric-constant filler and an interface regulating agent through solvent dispersion; by adopting the technical scheme of compounding the surface modified silicon dioxide nanoparticles and the polyimide matrix, the technical effects of reducing the dielectric constant and reducing the leakage current are achieved. By modifying the filler, the dispersity and interface bonding property of particles are improved, and the defects of high dielectric constant and large leakage current caused by interface polarization and uneven distribution of the filler in the prior art are overcome.

The invention relates to the technical field of rubber paint, in particular to rubber paint with good wear resistance and a preparation method thereof. The rubber paint is prepared from the following raw materials in parts by weight: 60-80 parts of chlorinated rubber, 30-50 parts of solvent, 20-40 parts of alkyd resin, 10-20 parts of polytetrafluoroethylene resin, 6-10 parts of epoxy resin, 6-10 parts of filler, 4-6 parts of additive, 2-4 parts of flatting agent, 1-3 parts of ultraviolet light absorber, 1-3 parts of dispersing agent and 1-3 parts of defoaming agent. According to the rubber paint, fluorosilane has the characteristic of low surface energy, a molecular layer with low surface energy can be formed on the surface of the rubber paint, the friction force borne by the surface of the rubber paint is small due to the low surface energy, the wear resistance of the rubber paint is improved, tetraethyl orthosilicate and ammonia water are matched to generate a hydrolytic condensation reaction, and silicon dioxide nanoparticles are generated; inorganic rigid components in the rubber paint are further increased, so that the overall hardness and wear resistance of the rubber paint are enhanced.

The invention discloses a surface self-cleaning polypropylene material and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out melt blending on PP and fluorosilane modified silicon dioxide nanoparticles in an open mill to obtain a composite material; then the composite material is pressed on a flat plate press, the surface of the composite material is covered with a fluorine-containing base plate during pressing, in the pressing process, silicon dioxide particles are migrated to the PP surface to construct a micro-nano coarse structure, and the surface hydrophobicity of the composite material is improved through the synergistic effect of low surface energy of modified silicon dioxide. The contact angle between the hydrophobic PP surface and water in air is greater than or equal to 120 degrees, and the hydrophobic PP surface has excellent self-cleaning performance. The invention effectively solves the problems of complex process and poor effect of improving the hydrophobicity of the polypropylene material in the prior art. The preparation process is simple and convenient to operate, and the product is excellent in performance and has a self-cleaning effect.

The invention provides a powdery modified aramid nanofiber filler as well as a preparation method and application thereof, and belongs to the technical field of composite materials. The method provided by the invention comprises the following steps: firstly, adding a water-soluble high polymer into a solvent, then adding nano aramid fiber hydrogel into the solution, and finally, respectively adding an alkoxy silane compound and a silicate compound into the solution to obtain the powdery modified aramid nano composite filler with functionalized silicon dioxide nanoparticles grafted on the surface. The modified aramid nano composite filler prepared by the invention is powdery solid filler, is easy to industrialize, and can be applied as nano composite filler of a polymer composite material. According to the prepared modified aramid nano composite filler / polymer composite material, the problem that the aramid nano fibers are difficult to disperse in the polymer is effectively solved, and more importantly, the physical and mechanical properties of the composite material are improved.

The invention discloses a waterborne polyurethane coating with corrosion-resistant and antifouling characteristics as well as a preparation method and application thereof, and the waterborne polyurethane coating is prepared from the following raw materials in parts by weight: 30 parts of diisocyanate, 15-30 parts of polycarbonate diol, 0.01-0.02 part of a catalyst, 3-5 parts of polydimethylsiloxane, 3-5 parts of a hydrophilic chain extender and 1-3 parts of a micromolecule chain extender. The preparation method comprises the following steps: preparing the following components in parts by weight: 0.5-3 parts of modified silicon dioxide nanoparticles, 1-3 parts of triethylamine, 4-10 parts of acetone and 130-150 parts of water; the modified silicon dioxide nano particles are nano silicon dioxide modified by a silane coupling agent and dodecyl triethoxy silane. The waterborne polyurethane coating can effectively prevent corrosion of seawater to metal equipment and adhesion of marine organisms to the surface of underwater metal equipment, and has important significance in expanding the application of the waterborne polyurethane coating in the field of marine protection.

The invention relates to the field of molecular sieves, and discloses a modified and reinforced molecular sieve and application thereof in hydrocarbon dehydration, the modified and reinforced molecular sieve is obtained by mixing 4A molecular sieve raw powder, modified lamb liver soil and deionized water into spheres, calcining the spheres in a muffle furnace, crystallizing the spheres by using a sodium hydroxide solution, and then replacing the spheres by using a potassium chloride solution, the mass ratio of the 4A molecular sieve raw powder to the modified lamb liver soil to the deionized water is (5.5-6): 1: (1.2-1.6), the modified lamb liver soil is prepared by calcining lamb liver soil by using a muffle furnace and performing acid leaching for pretreatment, then performing amination modification by using gamma-aminopropyltriethoxysilane, and further performing in-situ growth of silicon dioxide nanoparticles on the surface of the aminated lamb liver soil through electrostatic assembly. The modified enhanced molecular sieve is prepared through balling, firing, crystallization in the alkaline environment and potassium chloride replacement, so that the static adsorption capacity of the modified enhanced molecular sieve is increased to about 24%, and the modified enhanced molecular sieve has better application in hydrocarbon dehydration.

The invention discloses low-irritation cyhalothrin and a preparation method and application thereof, and belongs to the technical field of pesticide preparations, the low-irritation cyhalothrin comprises silicon dioxide nanoparticles with the surfaces grafted with amphiphilic copolymers, cyhalothrin and an anti-allergic drug, the silicon dioxide nanoparticles with the surfaces grafted with the amphiphilic copolymers are dispersed in a solvent, and the anti-allergic drug is added to the silicon dioxide nanoparticles with the surfaces grafted with the amphiphilic copolymers to prepare the low-irritation cyhalothrin. The preparation method comprises the following steps: taking porous silicon dioxide nanoparticles as a carrier, modifying a layer of amphiphilic polymer on the surface of silicon dioxide in situ, then adding cyhalothrin and an anti-allergic drug, continuously stirring, and drying the obtained product to obtain the low-irritation cyhalothrin. The cyhalothrin and the anti-allergic drug are loaded in silicon dioxide pore channels, and the anti-allergic agent is used in cooperation, so that the skin irritation of the cyhalothrin is reduced. The cyhalothrin with low irritation provided by the invention is simple in preparation method, can be used as a cyhalothrin insecticide raw medicine, and has relatively great market application potential.

The invention relates to the technical field of anti-adhesion packaging material research and development, and discloses an anti-adhesion liquid packaging film and a preparation process thereof, and the preparation process comprises the following steps: synthesizing an octa-cyclohexyl double-layer cyclic siloxane monomer, carrying out an addition reaction on a Si-H bond of the octa-cyclohexyl double-layer cyclic siloxane monomer and an alkenyl functional group of an allyl silane coupling agent to obtain an octa-cyclohexyl double-layer cyclic siloxane monomer; preparing to obtain an organic-inorganic hybrid type connecting agent; the preparation method comprises the following steps: carrying out modification treatment on hydroxylated silicon dioxide nanoparticles through an organic-inorganic hybrid connecting agent, and then dispersing the modified hydroxylated silicon dioxide nanoparticles in a PE-SILICON-PE block copolymer matrix to prepare the anti-adhesion composite material. A film structure of a nine-layer co-extrusion film is arranged, an anti-adhesion composite material is introduced into a first layer and a ninth layer of the nine-layer co-extrusion film, a nine-layer co-extrusion blow molding film forming technology is adopted, the packaging film with the excellent anti-adhesion performance is prepared, and the packaging film can be applied to the field of packaging of non-Newtonian liquid products.

The invention discloses a soft coal seam nanofluid fracturing propping material and a preparation method thereof.The soft coal seam nanofluid fracturing propping material is prepared from, by weight, 80-90% of a base material, 1-5% of a super-hydrophobic coating, 5-10% of a catalytic active component and 5-15% of a rheological enhancer, the base material is a compound of high-purity silicon dioxide nanoparticles and graphene nanosheets GNP, the particle size of the high-purity silicon dioxide nanoparticles is 50-200 nm, the super-hydrophobic coating is a fluorosilane modified layer, the thickness of the super-hydrophobic coating is 5-20 nm, and the invention relates to the technical field of coal bed gas exploitation. According to the soft coal seam nanofluid fracturing propping material and the preparation method thereof, the surface of the material is provided with a super-hydrophobic coating, friction force with a coal matrix is reduced, high embedding resistance is achieved, the flow conductivity is specifically enhanced, an extra flow channel is provided through a porous nanostructure, the fracturing fluid permeability is improved, and meanwhile gas desorption can be cooperated; catalytic active sites are introduced to the surface of the material to promote adsorption and diffusion of methane molecules.

The invention discloses a transfer coating for improving the scratch resistance of tobacco transfer paper and a preparation method of the transfer coating, and particularly relates to the field of tobacco packaging. The coating is composed of polyurethane (PU) resin, acrylate resin and epoxy resin, and self-repairing microcapsules are added into the coating. A shell material of the self-repairing microcapsule is a polylactic acid-polyglycolic acid copolymer, and the self-repairing microcapsule is filled with silicon dioxide nanoparticles, polydimethylsiloxane, epoxy resin and an antioxidant vitamin E; the microcapsule is prepared through a double-emulsion method, chitosan is used as a stabilizer, polyethylene glycol is used as an emulsifier, and carbon nanotubes are used as a reinforcing agent; when the coating is damaged, the microcapsules are broken to release the repairing agent, so that the cracks are automatically repaired; the coating also contains a nano material and a functional filler, so that the wear resistance and mechanical strength of the coating are remarkably improved; through the improvement, the transfer coating disclosed by the invention prolongs the service life of the tobacco transfer paper and provides more excellent scratch resistance.

The invention relates to a wear-resistant high-strength high-toughness plastic plate and a preparation process thereof, and belongs to the technical field of plastic plate preparation. The formula of the plastic plate comprises polyamide resin, polycarbonate, modified glass fibers, chopped carbon fibers, polytetrafluoroethylene powder, silicon dioxide nanoparticles, a silane coupling agent KH-550, an organic nucleating agent and a lubricant. The modified glass fiber is prepared by treating sodium silicate and polyborosiloxane, and has excellent performance. The preparation process comprises the steps of raw material pretreatment, premix preparation, low-speed fiber mixing, twin-screw extrusion granulation, screw type injection molding and the like. In the preparation process, high strength, high toughness and wear resistance of the plastic plate are ensured by controlling the ratio of the raw materials and processing technological parameters, such as temperature, rotating speed, pressure and the like.

The invention provides a high-durability super-amphiphobic aircraft anti-icing coating and a preparation method thereof.The preparation method comprises the steps that silicon dioxide nanoparticles are loaded on the surfaces of micron attapulgite particles in situ to prepare core-shell structure micro-nano composite particles, and low-surface-energy fluorosilane is added for modification; meanwhile, fluorinated modification is conducted on a waterborne polyurethane adhesive through fluorosilane, the modified micro-nano particles are introduced into the modified polyurethane adhesive, then the surface of semi-cured airplane paint is evenly sprayed with the modified polyurethane adhesive, and the super-amphiphobic anti-icing coating is prepared through curing. The super-double hydrophobic surface prepared by the method shows excellent repellency to liquids (water, rapeseed oil, lubricating oil and hexadecane) with different surface tensions, can delay icing of liquid drops on the surface of a coating for 440 seconds at-15 DEG C, and has excellent comprehensive protection performance of wear resistance, airflow impact resistance, oil stain resistance and acid and alkali corrosion resistance; good super-amphiphobic performance can be kept after mechanical wear and chemical corrosion.

The invention relates to a composite solid electrolyte, a preparation method and a sodium ion battery, and belongs to the field of sodium batteries. The composite solid electrolyte comprises the following components in parts by mass: 70-90 parts of a polymer matrix, 1-15 parts of sodium salt and 1-15 parts of silicon dioxide nanoparticles. In the composite solid electrolyte disclosed by the invention, the silicon dioxide nanoparticles can adsorb PF6 <->, so that the dissociation of NaPF6 and the release amount of free sodium ions are promoted, and the improvement of ionic conductivity is facilitated.

The invention relates to the field of biomimetic materials, in particular to a biomimetic self-cleaning anti-fouling aquaculture net cage material, a preparation method and application of the biomimetic self-cleaning anti-fouling aquaculture net cage material. 0.5 to 2.0 parts by weight of a carboxylated graphene nanosheet; 2.0 to 5.0 parts by weight of nitrogen-doped titanium dioxide nanoparticles; 1.0 to 3.0 parts by weight of silica nanoparticles; 5.0 to 10.0 parts by weight of calcium ion cross-linked modified sodium alginate; 1.0 to 3.0 parts by weight of octadecyl trichlorosilane; 0.5 to 1.5 parts by weight of lauryl sodium sulfate; through the synergistic effect of a double bionic structure and enhanced photocatalysis, the effective inhibition on attachment of various organisms is realized, and the inhibition rate on attachment organisms such as algae, bacteria and barnacles reaches 75% or above.