200 results about "Sio2 nanoparticle" patented technology

The invention belongs to the technical field of stainless steel surface treatment, and particularly relates to a stainless steel passivation solution and a preparation method thereof. The water-based cutting fluid is prepared from the following raw materials: cerium salt, copper sulfate, citric acid, sodium dihydrogen phosphate, ammonium molybdate, sodium tungstate, aminated-silane modified SiO2 nanoparticles, polyethylene glycol, L-ascorbic acid, polyaspartic acid, an anti-settling agent, a surfactant and the balance of deionized water. According to the invention, a three-dimensional network skeleton is constructed by using aminated-epoxy group silane modified SiO2 nanoparticles, so that the problem of weak interface bonding force of a traditional passivation layer is solved; according to the formula, the proportion of biodegradable components such as citric acid and polyaspartic acid is extremely high, cerate adopts a low-toxicity rare earth compound, molybdenum / tungsten elements are fixed in a stable oxide form, the dosage of EDTA is remarkably reduced through a compounding technology, residual ions are adsorbed in combination with a three-dimensional network, and the balance of environment friendliness and long-acting corrosion resistance is achieved.

The invention discloses a fruit and vegetable exosome extraction method based on ligand fishing. The fruit and vegetable exosome extraction method comprises the following steps: suspending amino-functionalized Fe3O4 (at) SiO2 nanoparticles in a glutaraldehyde solution, and adding activated agglutinin to obtain Fe3O4 (at) SiO2-agglutinin nanoparticles; adding a glutaraldehyde solution into agarose gel to obtain a size exclusion chromatographic column filler; the method comprises the following steps: dispersing Fe3O4 (at) SiO2-lectin nanoparticles in a PBS buffer solution to obtain a uniform suspension, adding the uniform suspension into a size exclusion chromatographic column filler to obtain a uniform slurry, filling the size exclusion chromatographic column with the uniform slurry, and flushing with the buffer solution to form a magnetic bead stationary phase; and loading fruit and vegetable supernatant into a size exclusion chromatographic column, passing through the magnetic bead stationary phase, cleaning residual impurities combined on the exosome-magnetic bead compound by using a buffer solution, and dissociating the exosome from the magnetic beads by using a competitive eluent of the exosome to obtain the high-purity fruit and vegetable exosome. The problem that an existing exosome extraction method is difficult to meet the requirements of high efficiency, simplicity, high purity and high activity at the same time is solved.

The invention relates to the technical field of plant polysaccharide extraction, in particular to a process for synergistically extracting rape pollen polysaccharide by a compound enzyme, which comprises the following steps: crushing rape pollen to 200-300 meshes by pulse airflow, performing microwave-ultrasonic degreasing by using a 85% ethanol solution, mixing with an acetic acid-sodium acetate buffer solution with the pH value of 4.8, and performing ultrasonic extraction to obtain a crude extract; the method comprises the following steps: adding a compound enzyme system which is immobilized by Fe3O4 (at) SiO2 nanoparticles by cellulase, pectinase, protease and beta-glucosidase according to a mass ratio of 2: 1: 1: 0.5, carrying out enzymolysis for 4 hours in a 50 DEG C constant-temperature water bath and a 15V / cm pulsed electric field, carrying out enzyme deactivation on enzymatic hydrolysate, carrying out gradient ethanol precipitation, carrying out ultrafiltration deproteinization, and carrying out vacuum pulsation freeze drying to obtain the polysaccharide. According to the method disclosed by the invention, the cell wall breakage rate and the enzymolysis efficiency are improved through pulsed airflow crushing, magnetic nano immobilized enzyme and pulsed electric field assistance, the polysaccharide yield reaches 7.32%, the purity is 91%, the beta-glucosidic bond proportion and the antioxidant activity are remarkably improved, the enzyme can be recycled and reused, the drying time is shortened, and efficient and low-consumption extraction is realized.

The invention relates to the technical field of composite materials, and particularly discloses a SiO2-coated LDHs nano composite material with high adsorption efficiency and a preparation method thereof.The preparation method comprises the steps that SiO2 nano particles are modified through double coupling agents, chitosan and F127 double template agents are combined to synthesize an LDHs precursor, and then the LDHs precursor is prepared into the SiO2-coated LDHs nano composite material. In-situ growth of a core-shell structure is realized by using a micro-channel reactor, an interface is strengthened by depositing Al2O3 through ALD, and interlayer ions are finally pre-loaded through hierarchical pore carbonization and thermo-sensitive-light response polymer grafting, so that the SiO2 (at) LDHs composite material with triple interface protection, a hierarchical pore structure and an intelligent response function is formed, the adsorption capacity and the cycling stability are remarkably improved, and the application range is wide. And the production cost is greatly reduced.

The invention belongs to the technical field of construction of super-hydrophobic surfaces, and particularly relates to a preparation method of a super-hydrophobic coating with a multistage micro-nano structure. Comprising the following steps: pretreating a substrate; slowly adding the F-SiO2 nanoparticle dispersion liquid into the fluorine-containing glue solution under the synergistic treatment of ultrasonic and magnetic stirring to obtain an F-SiO2 / fluorine-containing glue composite solution; the method comprises the following steps: determining the actual glue coating amount based on the theoretical glue demand amount of a PDMS template, and coating the F-SiO2 / fluorine-containing glue composite solution on the surface of a substrate through spin coating to form a wet film; coining the wet film by using a PDMS template, and stripping the template after ultraviolet curing to obtain the super-hydrophobic coating with the multistage micro-nano structure. Based on an imprint method with insufficient glue amount, synchronous construction of a micro / nano dual-scale structure is achieved by accurately controlling the ratio of the volume of the coating liquid to the volume of the pore of the template and combining the curing shrinkage characteristic of the polymer, and the method has application potential in the fields of anti-icing, microfluid devices, marine antifouling and the like.

The invention relates to the technical field of preparation of composite functional materials, in particular to a scale structure coating based on a PDMS / Co (at) SiO2 composite material and a preparation method and application of the scale structure coating. The preparation method comprises the following steps: mixing vinyl-terminated polydimethylsiloxane with methylhydrosiloxane to obtain a pre-polymerized solution; dispersing cobalt powder in the prepolymerization liquid to obtain a PDMS / Co mixture, coating the PDMS / Co mixture on the surface of a mold with a scale structure, and stripping the mold after curing to obtain a PDMS / Co scale array; and modifying SiO2 nanoparticles on the surface of the PDMS / Co scale array to obtain the scale structure coating based on the PDMS / Co coated SiO2 composite material. According to the invention, by constructing the multistage micro-nano structure and cooperating with the magnetic response and photothermal effect, a ''magnetostrictive unbalance-elastic rebound'' liquid drop directional transport mechanism and a photothermal-super-hydrophobic cooperative anti-icing function are constructed, and the problems of low energy efficiency, poor environmental adaptability and easy failure under extreme conditions of an existing anti-icing material are solved.

The invention belongs to the technical field of nuclear magnetic resonance spectrums, and particularly relates to a preparation method of a responsive multi-component material and application of the responsive multi-component material in 129Xe / 1H dual-mode signal change. According to the method, the Fe3O4 (at) SiO2 nanoparticles are used as a precursor, KMnO4 is used as a raw material, the Fe3O4 (at) SiO2 (at) MnO2 nanoparticles are synthesized, and the synthesized nanoparticles are complete in morphology and uniform in size. A transverse relaxation rate 1 / T2 signal of protons of the multi-component material obtained by the strategy is quenched, a dissolved state signal of 129Xe is basically unchanged, but after the reaction with 10mM glutathione, the 1 / T2 signal is recovered, the dissolved state signal of 129Xe is obviously reduced, the change of a 129Xe / 1H double nuclear magnetic resonance signal is realized, and the change of the 129Xe / 1H double nuclear magnetic resonance signal is realized. And the method has certain significance for enriching the application of the hyperpolarized 129Xe magnetic resonance probe and the development of a multi-mode magnetic resonance imaging nano platform.

The invention belongs to the technical field of chromatographic packing, and particularly relates to a double-layer stacking hole type SiO2-coated SiO2 core-shell microsphere as well as a preparation method and application thereof. The core-shell microsphere takes micron-sized non-porous SiO2 as a core and takes a SiO2 nanoparticle stacking layer as a porous shell layer, the porous shell layer sequentially comprises a first SiO2 mesoporous shell layer and a second SiO2 mesoporous shell layer from inside to outside, SiO2 nanoparticles in the first SiO2 mesoporous shell layer are stacked to form a first gap pore channel, and SiO2 nanoparticles in the second SiO2 mesoporous shell layer are stacked to form a second gap pore channel. According to the invention, a porous shell structure with dual or multiple pore size distribution is constructed on the surface of a SiO2 core, and by integrating more than two pore sizes with obvious size difference, exclusive mass transfer paths are provided for solute molecules with different sizes, exclusive mass transfer channels can be provided for small-molecular compounds and macromolecular substances at the same time, and the pore size difference is greatly reduced. Therefore, the selectivity and column efficiency of chromatographic separation are remarkably improved.

The invention discloses a preparation method of a photo-thermal anti-icing and deicing super-amphiphobic coating, which comprises the following steps: firstly, adding TiN nanoparticles into a dopamine solution, so that dopamine is subjected to an auto-polymerization grafting reaction on the surfaces of the TiN nanoparticles to obtain PDA-TiN nanoparticles; dispersing the PDA-TiN nanoparticles, the SiO2 nanoparticles, the epoxy resin and the epoxy resin curing agent into absolute ethyl alcohol, adding TEOS and FAS, and dispersing; stirring the dispersion liquid twice to obtain uniformly dispersed spraying liquid; meanwhile, dispersing epoxy resin and an epoxy resin curing agent into absolute ethyl alcohol, spraying dispersion liquid onto a substrate material, and depositing an epoxy resin layer on the surface of the substrate material; and finally, uniformly spraying the spraying liquid on the surface of the epoxy resin layer, and then sequentially carrying out two times of solvent volatilization to obtain the photo-thermal type anti-icing and deicing super-amphiphobic coating loaded substrate material. A re-entering micro-nano structure and low surface energy required by the photo-thermal super-amphiphobic surface are formed on the substrate material through a spraying method and are used for preventing and removing ice.

The invention discloses a preparation method of Fe3O4 magnetic nanoparticles rich in carboxyl groups on the surface, which comprises the following steps: modifying Fe3O4 nanoparticles by using polyethylene glycol and silicon dioxide to enhance the dispersity and biocompatibility of the magnetic nanoparticles, modifying the surfaces of PEG-Fe3O4 coated SiO2 nanoparticles by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface, and modifying the magnetic nanoparticles rich in carboxyl groups on the surface by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface. Then octavinyl-POSS and double bonds on the surfaces of the nano particles are subjected to click modification to form an octahedral cage, 4-mercaptobenzoic acid and double bonds are further subjected to click modification, the surfaces of the nano particles are rich in carboxyl, and a polymer brush rich in carboxyl is constructed. Compared with a conventional streptavidin coupling method, a high-density polymer chain provides a large number of carboxyl active binding sites, so that the streptavidin coupling amount is increased, the antibody coupling rate is increased, and a solution is provided for applications such as high-sensitivity biological detection, efficient targeted drug delivery and stable immunoassay.

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 relates to the technical field of concrete, and provides anti-crack concrete and a preparation method thereof.The anti-crack concrete is prepared from, by weight, 280-350 parts of cement, 50-80 parts of mineral admixture, 1000-1200 parts of gravel, 650-850 parts of sand, 6.0-10.0 parts of water reducing agent, 16-20 parts of expanding agent, 10-25 parts of fiber and 140-160 parts of water; the fiber is a nano-modified PVA fiber and is formed by grafting SiO2 nano-particles with the particle size of 20 nm on the surface of the PVA fiber, and the grafting amount is 3%-5%. The PVC fibers are subjected to nano modification, SiO2 nanoparticles with the particle size of 20 nm are grafted to the surfaces of the PVC fibers, a low-surface-energy dispersion layer is formed on the surfaces of the PVA fibers, the agglomeration resistance of the PVA fibers is improved, agglomeration generated when the PVC fibers are used for preparing the anti-crack concrete is reduced, and then the anti-crack performance of the concrete is improved.

The invention provides a high-temperature-resistant and corrosion-resistant ammonia water nozzle coating and a preparation method thereof, and belongs to the field of coatings. The ammonia water nozzle coating is composed of a self-repairing metal ceramic bonding layer, an organic-inorganic hybrid corrosion-resistant layer and a functional surface layer which are sequentially arranged in a stacked mode. A coating of the self-repairing metal ceramic bonding layer is composed of the following components of 90-99 parts of NiCrAlY alloy and 1-8 parts of self-repairing microcapsules. A coating of the organic-inorganic hybrid corrosion-resistant layer is prepared from the following components: 40 to 60 parts of fluorinated polyurethane prepolymer, 20 to 40 parts of silicon-aluminum sol, 1 to 8 parts of disulfide bond modified epoxy resin and 10 to 20 parts of magnesium-aluminum hydrotalcite; the coating of the functionalized surface layer is prepared from the following components: 20 to 30 parts of stearic acid modified TiO2 particles, 60 to 80 parts of waterborne polyurethane and 2 to 7 parts of ionic liquid modified SiO2 nanoparticles. The corrosion resistance, the high temperature resistance and the self-repairing capacity of the ammonia water nozzle are improved at the same time.

The invention belongs to the technical field of metal anticorrosive coating materials, and particularly relates to a super-hydrophobic composite coating and a preparation method thereof. According to the invention, MoS2 is used as a skeleton, CeO2 nanoparticles are uniformly loaded on the surface of a MoS2 two-dimensional layered structure, polydopamine is used as a connecting agent to form a stable Ce-MoS2 composite filler, and an active and passive protective layer with the Ce-MoS2 composite filler is constructed on the surface of a matrix and is used as a bottom layer. And then, forming a hydrophobic coating containing modified SiO2 on the bottom layer to serve as a surface layer, so as to obtain the super-hydrophobic composite coating with double protection mechanisms. According to the coating, the active corrosion inhibition function of CeO2 and the physical shielding effect of MoS2 are combined, meanwhile, hydrophobic SiO2 nano-particles are introduced into the surface layer, the hydrophobic performance of the surface is further enhanced, and therefore the technical problems that a traditional coating is prone to corrosion at the defect position and a corrosive medium is prone to permeation, and consequently the protection effect is remarkably reduced are effectively solved.

The invention discloses a nano phase change heat storage material with high decomposition temperature as well as a preparation method and application thereof, and belongs to the technical field of mixed molten salt energy storage materials. The nanometer phase change heat storage material is composed of 99 wt% of low-melting-point mixed molten salt and 1 wt% of SiO2 nanometer particles. The low-melting-point mixed molten salt is composed of potassium nitrate, sodium nitrite and sodium nitrate according to the mass ratio of 53: (10-30): (17-37). The low-melting-point and high-decomposition-temperature nanometer phase change heat storage material with the melting point being 150-175 DEG C and the decomposition temperature being 660-723 DEG C is prepared by combining the mixed molten salt composed of potassium nitrate, sodium nitrite and sodium nitrate according to the specific dosage ratio with SiO2 nanoparticles, the melting point of the phase change material is low, energy consumption can be effectively reduced, and the energy consumption is reduced. And the composition has good decomposition temperature, melting latent heat and other thermophysical properties.

The invention provides a preparation method of a self-repairing waterborne polyurethane leather coating material containing a polyurethane colloid capsule, which comprises the following steps: firstly, preparing an O / W type Pickering emulsion by taking modified SiO2 nanoparticles as a stabilizer and a polyurethane solution as an oil phase; the preparation method comprises the following steps: firstly, taking the polyurethane colloid capsule as a template, forming the colloid capsule capable of being dispersed in a water system through a sol-gel reaction, and finally, uniformly dispersing the colloid capsule into a waterborne polyurethane leather finishing emulsion to prepare the waterborne polyurethane leather self-repairing coating material containing the polyurethane colloid capsule. According to the invention, the polyurethane healing agent is used as a core material, and the modified SiO2 nanoparticles are used as a shell wall, so that the prepared spherical colloid capsule is high in encapsulation efficiency and strong in stability. According to the preparation method provided by the invention, the problems of poor self-repairing performance and mechanical property caused by low compatibility of a healing agent and a polyurethane matrix for leather finishing and easy agglomeration of a traditional microcapsule in a waterborne polyurethane emulsion in a traditional external aid type self-repairing polyurethane coating are solved; and the wear resistance of the leather polyurethane coating is remarkably improved by introducing SiO2.

The invention relates to the technical field of printing ink, in particular to modified resin for composite printing ink and a preparation method of the modified resin. 12%-18% of a dynamic covalent bond type fluorosiloxane copolymer; 5%-10% of bio-based degradable polyester resin; 3%-6% of TiO2 (at) SiO2 nanoparticles with a core-shell structure; 0.5%-2% of a pH response color changing material; 2%-5% of temperature-sensitive shape memory microspheres; 0.1%-0.8% of a light-induced isomerization molecular switch; 1%-3% of a biomimetic mineralization enhancer; 0.8%-1.5% of a gradient dispersing aid; 0.8%-2% of a two-dimensional black phosphorus / silver nanowire heterostructure; 1%-3% of a polydopamine modified boron nitride nanosheet; 5%-15% of epoxy functionalized organic silicone oil; 1%-4% of a photoinitiator; 0.5%-2% of an antioxidant / uvioresistant absorbent; 1%-3% of ceramic micro powder; 5%-15% of a high-performance pigment; 0.5%-2% of an infrared reflective additive; 0.1%-0.5% of a molecular sieve drying agent; 0.5%-2% of a self-repairing microcapsule; 2%-4% of hyperbranched polysilsesquioxane; 1%-3% of an efficient ultraviolet screening agent; and the balance of solvent.

The invention relates to the technical field of electromagnetic shielding and functional film preparation, in particular to a preparation and application method of an asymmetric electromagnetic shielding nanofiber film, which comprises the following steps: (1) preparing SiO2 nanoparticles; (2) dissolving SiO2 nano-particles in an organic solvent to obtain a SiO2 nano-particle dispersion liquid; adding a high-molecular polymer into the SiO2 nano-particle dispersion liquid as a carbon source to obtain a spinning solution; (3) carrying out electrostatic spinning operation on the spinning solution to prepare a PAN / SiO2 nanofiber film; (4) carbonizing the polymer to form a carbon-based skeleton to obtain a carbon-based thin film; (5) carrying out carbon thermal reaction on SiO2 and the carbon-based thin film to obtain an asymmetric electromagnetic shielding nanofiber thin film; a nanofiber substrate is constructed through an electrostatic spinning technology, and a conductive-dielectric asymmetric structure design is realized by combining a Joule heat technology and a Fick diffusion theory, so that the requirements of modern electronic equipment on light weight, high efficiency and multiple functions of an electromagnetic wave shielding material are met.

The invention relates to a silicon carbide-boron nitride three-dimensional heat conduction framework material and a preparation method and application thereof.The preparation method comprises the steps that boron nitride nanosheets are prepared into dispersion liquid, the pH of the dispersion liquid is adjusted through ammonia, then an organic silicon source is added for a reaction, and a precursor is obtained; the precursor comprises a boron nitride nanosheet and SiO2 nanoparticles loaded on the surface of the boron nitride nanosheet; mixing the precursor, polyamide acid and trimethylamine in a solvent, and performing freeze drying treatment to obtain composite aerogel; and sequentially carrying out thermal imidization treatment, carbonization treatment and carbon thermal reduction reaction on the composite aerogel to obtain the silicon carbide-boron nitride three-dimensional heat-conducting framework material. According to the preparation method, SiC nanowires are efficiently connected with BNNS to form a microstructure welded continuous heat-conducting network, and the prepared silicon carbide-boron nitride three-dimensional heat-conducting framework material has excellent heat conductivity, electric insulativity and flexibility when being used as a thermal interface material and is wide in application prospect.

The invention discloses a photosensitive self-repairing microcapsule based on a microfluidic technology and a preparation method of the photosensitive self-repairing microcapsule. The preparation method comprises the following steps: taking gum arabic (GA) and amphiphilic TiO2 as a continuous phase; the preparation method comprises the following steps: taking alicyclic photosensitive resin as a core material, and mixing the alicyclic photosensitive resin with a toluene-2, 4-diisocyanate (TDI) prepolymer to serve as a dispersion phase; oil-in-water (O / W) emulsion is collected based on a microfluidic technology, and the size of liquid drops is accurately controlled by adjusting the two-phase flow velocity; 1, 4 butanediol (BDO) is added into the emulsion to react with the TDI prepolymer to generate a polyurethane shell, meanwhile, Fe3O4 coated SiO2 nanoparticles are added, so that the microcapsule has a magnetic targeting function, agglomeration is reduced, and finally the photosensitive microcapsule which is uniform and controllable in particle size and has a self-repairing function is obtained.

The invention provides a multi-level EC-ZP-ESi-P solar evaporator based on a bionic double-channel structure and a preparation method thereof.The solar evaporator comprises a photo-thermal conversion layer, a hydrophilic thermal insulation layer and a water conveying column, the photo-thermal conversion layer is arranged on the upper surface of the hydrophilic thermal insulation layer, and the upper end of the water conveying column is connected with the middle of the lower surface of the hydrophilic thermal insulation layer; the water conveying column conveys liquid below to the hydrophilic thermal insulation layer through the capillary action; the preparation method of the photo-thermal conversion layer EC-ZP porous carbon nanofiber membrane comprises the following steps: taking ZIF-8 particles and PAN as raw materials, carrying out electrostatic spinning, and then carrying out high-temperature carbonization; the preparation method of the hydrophilic heat-insulating layer ESi-P nanofiber membrane comprises the following steps: taking SiO2 nanoparticles and PAN as raw materials, and carrying out electrostatic spinning. The EC-ZP-coated ESi-P solar evaporator can effectively prevent salt crystallization from blocking a steam channel, solves the problem of performance degradation caused by salt crystallization in an existing solar evaporation device, improves the photo-thermal conversion efficiency and the water-heat cooperative management capability at the same time, and achieves efficient and sustainable seawater desalination.

The invention provides a dispersion-strengthened transparent wear-resistant amphiphobic coating and a preparation method thereof, and belongs to the technical field of functional protection materials. The preparation method comprises the following steps: mixing an organosilane compound, small molecular acid, water and an alcohol solvent, carrying out hydrolytic condensation reaction, and removing the solvent to obtain the low-surface-energy resin; uniformly mixing the low-surface-energy resin, a cross-linking agent, the epoxy modified SiO2 nanoparticles, a photoinitiator and an organic solvent to obtain a photocureable coating; the surface of a base material is coated with the photocureable coating, ultraviolet curing is carried out, and the dispersion-strengthened transparent wear-resistant amphiphobic coating is obtained. The dispersion-strengthened transparent wear-resistant amphiphobic coating provided by the invention has excellent wear resistance and light transmission.

The invention discloses a high-wear-resistance nano filler modified rubber material and a preparation method thereof, and belongs to the technical field of rubber material modification. The preparation method comprises the following steps: by taking water-soluble polyacrylic acid micelles as a template, controlling the hydrolysis rate of tetraethyl orthosilicate by regulating and controlling the dosage of ammonia water, so as to prepare hollow SiO2 nanoparticles with a porous shell layer and a stable structure; and then synergistic modification is carried out through a PEG-PLA block copolymer and a silane coupling agent KH550, so that the dispersity and compatibility of particles are improved. And blending and banburying the modified porous hollow SiO2 particles and butadiene styrene rubber slurry, and carrying out vulcanization molding to obtain the modified rubber material. The wear resistance and tensile strength of the rubber are improved, good elasticity and elongation at break are kept, high strength, high wear resistance and high toughness are considered, and the process is mild and controllable.

The invention belongs to the field of new materials, and particularly relates to a super-hydrophobic composite coating with mechanical firmness, self-cleaning property and high wear resistance, a method and application thereof. According to the preparation method, epoxy resin (E51) is adopted as a binder, quartz sand, modified F-TiO nano particles and SiO nano particles are combined, and the quartz sand / F-TiO / SiO coated EP super-hydrophobic composite coating of a double-layer structure is prepared through a simple and convenient blade coating-spraying process. According to the coating, through multi-scale hierarchical structure design and low surface energy modification, a static water contact angle of 151 degrees and 1t are achieved; the rolling angle of 5 degrees shows excellent self-cleaning performance on liquid and solid pollutants. A mechanical stability test shows that in a Taber abrasion test, the coating still keeps good hydrophobicity after being abraded for 3000 cycles under the load of 250 g and abraded for 600 cycles under the load of 750 g; after 500 times of adhesive tape stripping experiments, the static water contact angle is still greater than 120 degrees, the rolling angle is as low as 5 degrees, and excellent wear resistance and substrate adhesion are shown.

The invention discloses a preparation method of a hydrophilic / hydrophobic SiO2 transparent high-adhesion wear-resistant super-hydrophobic coating for sandstone cultural relics. The preparation method comprises the following steps: 1, preparing hydrophilic SiO2 nanoparticles; 2, preparation of hydrophobic SiO2 nano particles; and 3, dispersing the hydrophilic / hydrophobic SiO2 nanoparticles prepared in the step 1 and the step 2 in an organic solvent, stirring and dispersing uniformly, adding a PDMS-CA mixture composed of polydimethylsiloxane and a curing agent, spraying the mixed liquid on the surface of a sandstone cultural relic, performing heat treatment, repeating the steps for several times, and drying at room temperature to obtain the hydrophilic / hydrophobic SiO2 transparent high-adhesion wear-resistant super-hydrophobic coating. A small amount of hydrophilic SiO2 nanoparticles are spontaneously attached to the surface of sandstone, are tightly linked with the sandstone through hydrogen bonds, and can form a stable rigid-flexible composite skeleton with polydimethylsiloxane to dissipate energy; the hydrophobic SiO2 nanoparticles are spontaneously close to the outer surface of the sandstone, so that the super-hydrophobicity of the coating is ensured; the prepared coating has transparency, super-hydrophobicity and mechanical durability.

As a charge-transporting varnish for forming a charge-transporting thin film with excellent hole transport properties, a charge-transporting varnish is provided, comprising copper halide (I) or pseudo-copper halide (I), one of an amine selected from formulas (1) to (3), SiO2 nanoparticles, and a solvent. (where R...) 1 ~R 4 Each can independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. L represents an alkylene group having 3 to 8 carbon atoms, and oxygen atoms may be present between the carbon atoms in the aforementioned alkylene groups. However, there must be at least 3 carbon atoms between H₂N⁻ and -OH. R 5 ~R 6 Each of these can independently represent an alkyl group having 1 to 6 carbon atoms that can be replaced by a hydroxyl group, and oxygen atoms may be present between the carbon atoms of these alkyl groups. However, R 5 and R 6 (At least one alkyl group is substituted with a hydroxyl group, or an oxygen atom is present between carbon atoms.)

The invention provides an electrochemical biosensor used for alpha-synuclein detection. The sensor comprises a magnetic particle capture probe coated by a monoclonal antibody, a SiO2 nanoparticle signal probe for detecting antibody modification and a nano porous membrane loaded glassy carbon electrode modified by graphene. During detection, alpha-synuclein is specifically combined with the monoclonal antibody-coated magnetic particle capture probe and the detection antibody-modified cadmium-doped SiO2 nanoparticle signal probe to form a compound with a sandwich structure, the compound is directly precipitated in an external magnetic field, uncombined substances are removed through cleaning, and the detection sensitivity is high. And then re-dispersing the precipitate (compound) in the electrolyte, and immersing the glassy carbon electrode loaded by the graphene-modified nano porous membrane. After electrification, the cadmium ions in the compound are subjected to redox reaction to generate a current signal, and the current intensity of the current signal is in direct proportion to the content of alpha-synuclein. The sensor has the advantages of simplicity in operation, rapidness in detection, high sensitivity, high specificity and the like.

The application belongs to the technical field of nuclear magnetic resonance spectroscopy, and particularly relates to a preparation method of a responsive multi-component material and application of the responsive multi-component material in 129 Xe / 1 H dual-mode signal change. The application synthesizes Fe3O4@SiO2@MnO2 nanoparticles by taking Fe3O4@SiO2 nanoparticles as a precursor and KMnO4 as a raw material, and the synthesized nanoparticles have complete morphology and uniform size. The transverse relaxation rate 1 / T2 signal of the multi-component material obtained through the strategy is quenched, 129 Xe has no change in the dissolved state signal, but after reacting with 10 mM glutathione, the 1 / T2 signal is restored, 129 Xe has a significant decrease in the dissolved state signal, and the 1 / T2 signal is restored, 129 Xe / 1 H dual-nuclear magnetic resonance signal change, and is of certain significance to the application of the hyperpolarized 129 Xe magnetic resonance probe and the development of multi-modal magnetic resonance imaging nano platforms.

The present invention provides a magnetothermal dual-responsive green nanoemulsifier and a preparation method thereof, belonging to the technical field of emulsifiers. The preparation method comprises the following steps: S1. preparing Fe3O4 nanoparticles; S2. preparing Fe3O4@SiO2 nanoparticles; S3. preparing Fe3O4@SiO2@NH2 nanoparticles; S4. preparing Fe3O4@SiO2@Br nanoparticles; and S5. preparing Fe3O4@SiO2@PNIPAM nanoparticles, which are the magnetothermal dual-responsive green nanoemulsifier. The preparation method of the present invention is simple and controllable, with a short cycle time. The resulting nanoemulsifier has good emulsification effect, high stability, and is environmentally friendly. It has efficient magnetothermal responsiveness and can be recycled and reused.

This case involves a TPU material for making shoe soles and its foaming process, including: thermoplastic polyurethane TPU, ethylene-vinyl acetate copolymer EVA, functional additives, foaming agents, cross-linking agents, and foaming accelerators; among them, the functional additives include styrene-acrylic resin, EVA grafted maleic anhydride, and modified SiO2. In this case, the SiO2 nanoparticles are modified to have stable dispersibility in the material, which can act as a reinforcing agent in the material and endow the foamed material with excellent reinforcing effects; in this application, the SiO2 nanoparticles are mixed with styrene-acrylic resin and EVA grafted maleic anhydride to form functional additives, which not only significantly improves the fusion degree of TPU and EVA, making the product have both the wear resistance and resilience of TPU and the light weight and softness of EVA; at the same time, it also further synergistically improves the mechanical strength of the foamed material, and can better meet the requirements for material properties when it is used as a shoe sole material.