129 results about "Sio2 nanoparticle" patented technology

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 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 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 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 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.

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 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 invention is suitable for the technical field of inorganic powder surface modification, and provides super-hydrophobic caustic-burned magnesia powder and a preparation method thereof. The super-hydrophobic light-burned magnesia powder comprises the following raw materials in parts by weight: 60-70 parts of 85% light-burned magnesia powder, 8-12 parts of modified SiO2 nanoparticles, 10-15 parts of tetraethoxysilane, 5-8 parts of hexadecyl trimethoxysilane, 80-100 parts of ethanol, 3-5 parts of ammonia water, 2-4 parts of modified zirconium oxide and 1-3 parts of a fluoride additive. According to the preparation method, SiO2 nanoparticles and zirconium oxide are modified, so that the hydrophobic property, hydration resistance stability and high-temperature service reliability of the light-burned magnesia powder are remarkably improved, the technical problems that traditional light-burned magnesia powder is high in hygroscopicity and prone to caking are solved, and the preparation method is simple in preparation process, controllable in cost and suitable for multiple industrial fields such as metallurgy and refractory materials.

This application relates to an anti-icing coating, its preparation method, and its application, belonging to the field of protective coating technology. The anti-icing coating comprises a superhydrophobic self-cleaning coating and a hydrophobic and oleophobic layer stacked together. The superhydrophobic self-cleaning coating includes first SiO2 nanoparticles and fluorosilane. The hydrophobic and oleophobic layer includes second SiO2 nanoparticles, nanocellulose, chitosan nanoparticles, and a binder. The use of natural polymer materials such as nanocellulose and chitosan nanoparticles in the hydrophobic and oleophobic layer results in lower cost and better environmental friendliness. The superhydrophobic self-cleaning coating achieves superhydrophobic properties through the synergistic effect of a nano-dispersion system and a "papillary" micro-nano rough structure. The hydrophobic and oleophobic layer further enhances the coating's hydrophobic and oleophobic properties and surface lubricity, significantly reducing the adhesion of ice to the coating surface.

The application discloses a preparation method and application of intelligent magnetic target super-branched polyurethane self-healing microcapsules, and comprises photosensitive microcapsules and epoxy resin which can be magnetically targeted, wherein Fe3O4@SiO2 nanoparticles of the microcapsule shell layer provide the microcapsules with the effect of targeted movement. In order to prevent the photosensitive resin inside the microcapsules from curing in advance, the shell layer is further modified by TiO2 / g-C3N4 to effectively shield the external visible light and ultraviolet light. For the damage of the base material to the electrical tree in the use process, after the electrical tree breaks the microcapsules, the core material in the capsules enters the damage channel through the siphon effect, and the in-situ electrochromic effect is good for repairing the electrical tree damage. The composite material system realizes the self-repairing of mechanical and electrical tree damage of the dielectric packaging material after long-term use, improves the service life of the material, and effectively avoids potential safety hazards in the later period.

The invention discloses an MXene / polypropylene composite material as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The MXene / polypropylene composite material is prepared from the following components in parts by weight: 100 parts of polypropylene, 4 to 10 parts of MXene, 0.1 to 3 parts of SiO2 nanoparticles and 2 to 10 parts of piperazine modified ammonium polyphosphate, according to the MXene / polypropylene composite material disclosed by the invention, a specific amount of MXene and piperazine modified ammonium polyphosphate are compounded, so that MXene nanosheets anchored by piperazine modified ammonium polyphosphate are more easily and orderly arranged along the direction of a force field when the MXene / polypropylene composite material is subjected to shearing force or interfacial tension of processing, and the barrier property to gas molecules is greatly enhanced, so that the oxygen permeation rate is remarkably reduced. The SiO2 nano-particles can be filled in gaps of MXene lamellas, a permeation blocking path is prolonged, and meanwhile, the rigidity and the stability of the material are enhanced, so that the oxygen permeation rate is remarkably reduced and the mechanical property is improved under the synergistic effect of all the components.

The invention discloses a coating material for an optical fiber, a preparation method of the coating material, an optical fiber insulator and a preparation method of the optical fiber insulator. The coating material is prepared from the following raw material components in parts by weight: 40-60 parts of tetrahydrofuran acrylate, 30-50 parts of carboxyl modified polyurethane acrylate oligomer, 5-15 parts of organic silicon modified epoxy acrylate bifunctional coupling agent, 2-5 parts of vinyl silane surface modified SiO2 nano-particles, 1-5 parts of organic silicon modified epoxy acrylate, 1-5 parts of organic silicon modified epoxy acrylate, 1-5 parts of organic silicon modified epoxy acrylate, 1-5 parts of organic silicon modified epoxy acrylate and 1-5 parts of organic silicon modified epoxy acrylate. 0.1 to 1 part by weight of a triaryl sulfonium hexafluoroantimonate cationic initiator and 0.5 to 4 parts by weight of a TPO free radical photoinitiator. According to the embodiment of the invention, active chemical bonding of the optical fiber coating layer and the alicyclic epoxy resin sheath is realized through the organic silicon modified epoxy acrylate bifunctional coupling agent in the coating layer, and mismatch of physical gaps and thermal stress of a multi-material interface is reduced; therefore, the interface strength, the internal insulation performance and the long-term reliability of the optical fiber insulator can be fundamentally improved.

The invention belongs to the technical field of composite materials, and particularly relates to a bulletproof material with a good sinking effect and a preparation method of the bulletproof material. The preparation method comprises the following steps: 1) uniformly mixing a dispersion medium and a dispersion phase to obtain STF, the dispersion medium being one or more of SiO2 nanoparticles, a silane coupling agent and polymethyl methacrylate, and the dispersion phase being one or more of polyethylene glycol and dioctyl phthalate; the invention discloses a bulletproof material and a preparation method thereof.The bulletproof material is prepared by the steps of (1) preparing ultra-high molecular weight polyethylene fibers, (2) mixing the STF and absolute ethyl alcohol to obtain an STF solution, dipping the ultra-high molecular weight polyethylene fibers in the STF solution to obtain ultra-high molecular weight polyethylene one-way cloth, and preparing a plurality of ultra-high molecular weight polyethylene one-way cloth through hot-pressing compounding, and (3) performing hot-pressing compounding on a plurality of layers of the STF one-way cloth to obtain the bulletproof material.

The application discloses a display screen functional film and a preparation method and application thereof, and belongs to the technical field of functional film materials. The method comprises the following steps: S1, SiO2 nanoparticles, ethanol, acetonitrile, polyvinylpyrrolidone and deionized water are mixed, and ultrasonic dispersion is carried out to obtain a dispersion liquid; tetrabutyl titanate is slowly added into the dispersion liquid, heating and stirring are carried out, and washing, drying and annealing are carried out to obtain SiO2@TiO2 particles; the SiO2@TiO2 particles, an epoxy-containing silane coupling agent and methanol are mixed, heating and stirring are carried out, and washing, drying and annealing are carried out to obtain modified SiO2@TiO2 particles. S2, the modified SiO2@TiO2 particles, 4,4'-diamino diphenyl sulfone and a leveling agent are dispersed in methyl isobutyl ketone, mixing is carried out, ultrasonic defoaming is carried out, and a coating is obtained; the coating is uniformly coated on an optical film, and the functional film with good light transmission, ultraviolet resistance and hydrophobicity is obtained after temperature rising and drying.

This invention discloses an organosilicon-modified acrylic resin coating, its preparation method, and its application, belonging to the field of surface protection technology. The organosilicon-modified acrylic resin coating of this invention comprises the following raw materials in parts by weight: 92-99 parts of organosilicon-modified acrylic resin and 1-8 parts of modified SiO2@FGO nano-hybrids. This invention achieves surface modification of graphene oxide using a silane coupling agent, and further obtains the coating through in-situ hydrolysis deposition and modification of SiO2 nanoparticles. The organosilicon-modified acrylic resin coating with composite nanofiller exhibits excellent resistance to chloride ion corrosion, carbonization, alkali resistance, weather resistance, and adhesion, and can be used for surface protection of marine reinforced concrete engineering projects.

The invention discloses an immunochromatography test strip based on an asymmetric near-infrared driving nano motor and a preparation method and application thereof.The immunochromatography test strip comprises a bottom plate and a sample pad, filter paper, a nitrocellulose membrane and absorbent paper which are sequentially overlapped and pasted to the bottom plate, and when the immunochromatography test strip is used, a PZSA-Ab buffer solution is dropwise added to the surface of the sample pad; the PZSA (at) Ab buffer solution is prepared from a PS-SiO2 (at) Au nano composite material and an antibody to be marked; the PS-SiO2 (at) Au nano composite material is nanoparticles of an asymmetric snowman-shaped structure, polystyrene nanospheres are arranged at one end of the asymmetric snowman-shaped structure, hemispherical SiO2 nanoparticles are arranged at the other end of the asymmetric snowman-shaped structure, and Au nanoparticles are loaded on the surface of the asymmetric snowman-shaped structure. According to the present invention, the PS-SiO2 (at) Au nano-composite material is adopted as the nano-motor to be combined with the antibody to be labeled, and the near-infrared light is adopted to drive the snowman-shaped nano-motor to directionally move so as to achieve the active capture and enrichment of the tumor marker, such that the detection sensitivity and the detection speed of the immunochromatography test strip can be significantly improved.

The invention discloses a thermosensitive intelligent device capable of regulating and controlling sunlight reflectivity in a large range and a preparation method of the thermosensitive intelligent device, and belongs to the field of intelligent materials and energy-saving buildings. The device is composed of an upper thermosensitive phase change layer and a lower sunlight reflecting layer. Wherein the lower layer takes polyvinylidene fluoride (PVDF) as a matrix, Al2O3 and SiO2 nanoparticles with two different sizes are doped, and a composite structure with a multi-stage scattering effect is formed through curing, so that the full-band sunlight reflecting capacity can be remarkably improved. And the upper layer is a reversible thermochromic interlayer formed by dissolving crystal violet lactone (CVL), bisphenol A and tetradecanol in a transparent substrate. The core mechanism is that at low temperature, the lower layer can serve as a light trap layer, light absorption of the upper layer is enhanced through multiple reflections, and the heating efficiency is improved; at high temperature, the upper layer becomes transparent, the overall reflectivity of the device is dominated by the lower layer, and efficient refrigeration is achieved. The device can regulate and control the sunlight reflectivity (greater than 60%) according to the environment temperature, and has a good application prospect in the field of energy conservation.

The invention discloses a molecular imprinting separation method for gallic acid in tara enzymolysis tannic acid waste liquid. The molecular imprinting separation method comprises the following steps: (1) preparing Fe3O4 nanoparticles; (2) preparing Fe3O4 (at) SiO2 nano particles; (3) preparing Fe3O4 (at) SiO2 (at) NH2 nano particles; (4) preparing a Fe3O4 (at) SiO2 (at) NH2 molecularly imprinted polymer; (5) pretreatment of waste liquid; and (6) gallic acid separation. The method has obvious advantages in the aspects of operation convenience, separation selectivity and repeatability, and an efficient and feasible technical scheme is provided for the field of natural product extraction.

A phase change microcapsule and a preparation method for an epoxy resin self-healing composite insulating material doped with the phase change microcapsule. The phase change microcapsule has a core-shell structure, with 500 nm silicon carbide particles and octacosane as a core, and an outer layer is coated with Fe3O4@SiO2 nanoparticles.

The invention discloses an environmental response type bionic antifouling coating and a preparation method thereof, and belongs to the technical field of bionic surface, the environmental response type bionic antifouling coating is composed of a high polymer material matrix with metastable state hydrogen bonds and a photoresponse type microcapsule, in the photoresponse type microcapsule, silicone oil is packaged in a (PSS / PDDA) n multi-layer polyelectrolyte microcapsule, a DDAB layer is wrapped outside the microcapsule, TiO2 / SiO2 nano particles are arranged outside the DDAB layer, and the TiO2 / SiO2 nano particles are uniformly distributed on the surface of the microcapsule. And the microcapsule with a (PSS / PDDA) n / DDAB / Oil / TiO2 / SiO2 structure is formed. The metastable state hydrogen bond high polymer material matrix is polydimethylsiloxane-based polyurea, a carbamido unit in a hard segment structure of the metastable state hydrogen bond high polymer material matrix can form a channel through opening and closing of the hydrogen bond, and silicone oil migration is regulated and controlled under the action of external force (such as water flow impact) or environmental factors (such as temperature change); meanwhile, the photocatalytic performance of TiO2 is utilized, stress is generated by degrading an organic middle shell layer under illumination, a SiO2-TiO2 shell is induced to collapse to release silicone oil, the release rate can be regulated and controlled by adjusting the ratio of SiO2 to TiO2, and the problem that release of a traditional coating is difficult to control is solved.

The invention relates to a super-hydrophobic corrosion-resistant coating for a seawater electrolysis hydrogen production pipeline and a preparation method of the super-hydrophobic corrosion-resistant coating, and belongs to the technical field of coating materials. The preparation method of the super-hydrophobic corrosion-resistant coating for the seawater electrolysis hydrogen production pipeline comprises the following steps: dissolving a silane coupling agent in a mixed solution of ethanol and water, coating the surface of a pretreated metal matrix with the solution, and heating and curing to form a coupling agent bonding layer; mixing a PDMS prepolymer with a curing agent, coating the surface of the coupling agent binding layer with the mixture, and heating and curing to form a PDMS buffer layer; siO2 nanoparticles modified by fluorosilane are dispersed in a fluorine polymer solution, the surface of the PDMS buffer layer is coated with the fluorine polymer solution, and the fluorinated SiO2 super-hydrophobic layer is formed through heating and curing. According to the method, the coupling agent binding layer, the PDMS buffer layer and the fluorinated SiO2 super-hydrophobic layer are sequentially constructed on the surface of the metal matrix, so that the binding force of the coating and the metal matrix is remarkably improved, and the coating is endowed with long-term alkali resistance, corrosion resistance and impact resistance.

The invention provides a preparation method of quartz sand. The preparation method of the quartz sand comprises the following steps: 1) mixing chlorosilane, silicate ester and water for hydrolysis reaction to generate hydrolysate containing HCl and SiO2 nanoparticles; 2) adding alkali liquor into the hydrolysate to enable the pH value of the system to reach 8.5-11 to form gel; according to the method, HCl and SiO2 nano particles are generated through preferential hydrolysis of chlorosilane, the HCl serves as a catalyst to be used for silicate ester hydrolysis, the SiO2 nano particles serve as crystal nucleuses of silicate ester sol-gel, and low-cost and high-efficiency preparation of the quartz sand is achieved.

The application relates to a multi-marker detection method of aptamer-antibody dual recognition coupling three-dimensional inverse opal hydrogel photonic crystal fluorescence enhancement, and belongs to the field of analytical chemistry and biomedical technology. Specifically, first, SiO2 nanoparticles with different particle sizes are synthesized to prepare a photonic crystal PhCs template, hydrogel precursors are permeated into the PhCs gap to obtain three-dimensional IOPCHs with different structural colors, then different target antibodies are modified to the surfaces of the different IOPCHs to realize specific recognition and enrichment of multiple targets. The detection part adopts a pre-constructed Aptamer-HCR compound, when the target is captured by the antibody fixed on the IOPCH surface, the corresponding compound directly combines the target through the aptamer, so that the amplified fluorescence signal is anchored on the IOPCH with a specific color, the PBG effect of the IOPCHs can inhibit non-radiative fluorescence decay, and the signal intensity is significantly enhanced, and the detection sensitivity is improved.

The invention discloses compound massage essential oil for relieving neck, shoulder, waist and leg pain and a preparation method of the compound massage essential oil, and belongs to the technical field of traditional Chinese medicine. 8 to 12% of sandalwood; 15 to 20% of frankincense; 5-8% of Chinese ilex; 12-18% of rhizoma curcumae longae; 5-8% of hypericum perforatum; 3-5% of arnica montana; 1.5% to 2.5% of Fe3O4 (at) SiO2 nano particles; 2.5%-3.5% of a photosensitive microcapsule; and 4-6% of a ceramide composite film. The Fe3O4-coated SiO2 nanoparticles are prepared by a nitrogen protection coprecipitation method, have a magnetic targeting function, and can be enriched at a pain part under the guidance of an external magnetic field; the photosensitive microcapsule realizes accurate release of active components triggered by ultraviolet light based on the photoresponse characteristic of azobenzene wrapped by gelatin-Arabic gum; the ceramide composite membrane reconstructs a stratum corneum lipid structure through cholesterol and free fatty acid synergistically, so that the macromolecular transdermal efficiency is improved, and the skin barrier is repaired; the neck, shoulder, waist and leg pain is remarkably relieved, and the device is suitable for sensitive skin and physical therapy combined scenes.

The invention relates to the technical field of hydrogen energy preparation and impurity removal, in particular to high-alkali-resistance ion exchange resin for hydrogen energy preparation and impurity removal, which is prepared from the following raw materials: styrene, divinylbenzene, a pore-foaming agent, an initiator, an inorganic modifier, chloromethyl ether, an amination reagent and a polymerization inhibitor. The inorganic modifier is SiO2 (silicon dioxide) nano particles or TiO2 (titanium dioxide) nano particles modified by gamma-aminopropyl triethoxy silane; the amination reagent is N, N-dimethyl cyclohexylamine. Through an inorganic and organic synergistic modification strategy and optimized selection of an amination reagent with better alkali resistance, activity attenuation and structural deterioration of functional groups of the resin in a high-alkali environment are effectively inhibited, capacity loss of the resin in long-term operation is remarkably reduced, the service life of the resin is greatly prolonged, and the service life of the resin is prolonged. The long-term operation requirement of a high-alkali working condition in a hydrogen energy preparation process can be fully met, the resin replacement frequency is reduced, and the process operation cost is reduced.

This application relates to the field of fuel cells and discloses a proton exchange membrane modified with dual inorganic fillers, comprising a Nafion composite membrane matrix; CeO2 anchored on amine-functionalized cellulose nanofibers (CNFs), wherein CeO2 accounts for 2% to 5% of the total mass of the composite membrane; SiO2 nanoparticles are added, wherein SiO2 nanoparticles account for 0.5% to 2% of the total mass of the composite membrane; and Al2O3 nanoparticles are added, wherein Al2O3 nanoparticles account for 0.5% to 2% of the total mass of the composite membrane. This invention significantly improves the hardness and compressive strength of the composite membrane by anchoring CeO2 on amine-functionalized cellulose nanofibers (CNFs) and adding SiO2 and Al2O3 nanoparticles, thereby improving its service life and reliability. Simultaneously, the addition of carbon nanotubes (CNTs) greatly enhances the electrical conductivity of the composite membrane, which is crucial for improving the output efficiency and response speed of the fuel cell, directly affecting the overall energy conversion efficiency of the battery.

The invention discloses an asymmetric functionalized nano SiO2-based masonry cultural relic anti-weathering reinforcing material as well as a preparation method and application thereof, and relates to the technical field of cultural relic protection materials. The method comprises the following steps: preparing multi-stage nano SiO2 particles, and preparing the paraffin template in a water-paraffin oil two-phase system by taking the multi-stage nano SiO2 particles as a solid emulsifier. And carrying out asymmetric chemical modification on the surface of the paraffin template to prepare the hydrophilic / super-hydrophobic Janus SiO2 nanoparticles. On the basis of hydrophilic / super-hydrophobic Janus SiO2 nanoparticles with multilevel morphology, the anti-weathering protection agent is used for anti-weathering protection of masonry cultural relics, endows the masonry cultural relics with excellent hydrophobicity, antibacterial activity and surface reinforcing effect, and has excellent performance durability.