54results about How to "Avoid easy reunion problems" patented technology

The invention relates to the organosilicon monomer synthesis field, and particularly relates to a Cu-Cu2O-CuO ternary copper-based solid solution catalyst and its preparation method. The method comprises the following steps of: 1) taking a mixture composed of 0.5-40wt% of metal copper powder and 20-80wt% of copper oxide as a raw material, conducting heat treatment at a temperature of 600-1000DEG C for 0.5-12h under inert gas protection, and then carrying out ageing at a temperature of 300-600DEG C for 1-15h so as to obtain a ternary copper-based solid solution; and 2) subjecting the ternary copper-based solid solution from step 1) to shattering and milling to obtain the Cu-Cu2O-CuO ternary copper-based solid solution catalyst. The copper-based solid solution catalyst prepared in the invention shows high dimethyldichlorosilane selectivity and silicon power raw material conversion rate.

The invention provides a nitrogen-doped carbon nano composite material coated by hollow copper doped monocrystalline silicon and a preparation method. The nitrogen-doped carbon nano composite materialcoated by hollow copper doped monocrystalline silicon is characterized by comprising a hollow nitrogen-doped carbon material, the hollow nitrogen-doped carbon material is externally coated with copper doped cobaltous nickel oxide. The prepared composite material has the characteristic of uniform structure and morphology, the ZIF-67 and polyaniline derived hollow nitrogen-doped porous carbon material supports the hollow polyhedral structure of the composite material, a doped copper element changes charge distribution of the eigenstate of cobaltous nickel oxide, and its catalytic performance isimproved; the copper doped cobaltous nickel oxide uniformly grow outside the hollow nitrogen-doped carbon material, and the problem is avoided that metallic oxide is easy to agglomerate. The nitrogen-doped carbon nano composite material has the advantages of being large in specific surface area, good in electrical conductivity, stable in physicochemical property, superior in electrochemical performance and the like.

The invention relates to a manufacturing method of screen cloth for shoes. The manufacturing method comprises the steps of 1 preparing a modifying agent for shoes, 2 preparing an anti-microbial spinning oil solution for shoes, 3 preparing modified polyester master batches for shoes, 4 preparing modified polyester monofilaments for shoes, and 5 manufacturing the screen cloth for shoes. The manufactured screen cloth for shoes has good anti-microbial healthcare effect.

The invention discloses a resin-based nano-hydroxyapatite composite material, a preparation method, and an application of the composite material in fluorine-polluted water treatment. The composite material is formed by immobilizing nano-hydroxyapatite particles on polymer resin, and the zero point of charge is 8-9.5, wherein the size of the nano-hydroxyapatite particles is in a range of 10-100 nm, the supporting amount of the nano-hydroxyapatite is in a range of 2-22%, and the polymer resin is polystyrene-divinylbenzene adsorption resin. The nano-scale hydroxyapatite particles are immobilized on the high-molecular resin material, so that the composite material with excellent adsorption performance, no secondary pollution, uniform size and easy separation and regeneration is obtained. The composite material has relatively high fluorine adsorption capacity in a polluted water body which is neutral or alkaline (pH=6-9), and has a specific adsorption function on fluorine ions in a high-competitiveness ion system. The composite material is low in preparation cost and simple in process, and is suitable for actual treatment of fluorine-polluted wastewater.

The invention relates to the technical field of EVA composite materials. The natural aromatic environment-friendly EVA composite foam material is prepared from the following components in parts by weight: 80-100 parts of a rubber and plastic base material, 4-8 parts of a foaming agent, 0.5-1 part of a cross-linking agent, 0.5-0.8 part of mineral oil, 0.5-1 part of stearic acid and 20-40 parts of modified lavender particles, and the rubber and plastic base material contains 40-100% of EVA. According to the invention, the modified lavender particles are adopted, volatilization of lavender aromacomponents can be effectively controlled, meanwhile, the antibacterial performance and deodorization of the foaming material and the product can be enhanced, the advantages of deodorizing, ventilating, refreshing, incensing, expelling parasites and the like are achieved, the utilization rate of lavender can be increased, waste and environmental pollution are reduced, and the lavender perfume is environmentally friendly and suitable for living goods and sports equipment such as soles, insoles, yoga mats and crawling mats.

The invention relates to vinyl-containing cage type silsesquioxane modified bismaleimide resin and a preparation method thereof. The vinyl-containing cage type silsesquioxane modified bismaleimide resin comprises 40-100 parts of bismaleimide resin, 30-80 parts of diallyl bisphenol A and 4-10 parts of methacryloxypropyl cage type silsesquioxane in parts by weight, wherein the bismaleimide resin ismodified to substantially improve the toughness of the bismaleimide resin without lowering the strength of the bismaleimide resin. The vinyl-containing cage type silsesquioxane modified bismaleimide resin has the beneficial effects that used vinyl-containing cage type silsesquioxane has high synthesis yield, is added to the resin system to avoid the poor dispersibility of inorganic nanoparticles and the problem of easy agglomeration of inorganic nanoparticles in the resin system, and improves the toughness and strength of the bismaleimide resin.

The invention discloses a high-capacity carbon nanotube composite cobalt sulfide negative electrode material and preparation and application thereof, and belongs to the technical field of a lithium ion battery. A rod-shaped cobalt-containing precursor is generated by hydrolysis reaction of crystal water contained in cobalt acetate tetrahydrate and cobalt acetate, the size of the cobalt-containingprecursor is limited to obtain a nanometer rod-shaped precursor under an effect of PVP, TAA reacts with the precursor to generate nanometer rod-shaped cobalt sulfide, the crystallization property of the material can be improved during the subsequent sintering process, the nanometer material of a carbon nanotube is uniformly combined, the reduction of the internal resistance and the electron transmission are facilitated, and the electrochemical performance is greatly improved. A freeze drying technology is used, the problem that the carbon nanotube is easy to agglomerate is effectively prevented, the obtained carbon nanotube composite CoS negative electrode material has high specific capacity, high charge-discharge capacity and high initial coulombic efficiency, and the capacity attenuationsituation can be remarkably improved.

The invention provides a preparation method of a PET / magnetic Fe3O4 functional nanocomposite material. The preparation method is as below: first preparing magnetic Fe3O4 nanoparticles by a co-precipitation method; and then conducting surface modification on magnetic Fe3O4 nanoparticles with KH550, so that the surface of Fe3O4 magnetic nanoparticles are grafted with active functional groups and that modified Fe3O4 magnetic nanoparticles can organically bind with PET molecular chains. Addition of modified Fe3O4 magnetic nanoparticles with different proportion in an esterification process of PET esterification polycondensation and adjustment of the addition amount of the modified Fe3O4 magnetic nanoparticles can obtain uniformly dispersed PET / magnetic Fe3O4 functional nanocomposite material with good reinforcement, toughening and electromagnetic shielding effects. A film prepared from the modified PET / magnetic Fe3O4 functional nanocomposite material has magnetic shielding effectiveness reaching a highest value -52 dB and an average value about -32 dB.

The invention relates to a manufacturing method of screen cloth for bedding articles. The manufacturing method comprises the following steps: I, preparing a spinning modifying agent for the bedding articles; II, preparing a spinning oil agent for the bedding articles; III, preparing spinning polyester functional master batch for the bedding articles; IV, preparing multi-performance polyester polyester monofilaments for the bedding articles; V, preparing the screen cloth for the bedding articles. The prepared screen cloth has a good bacteriostatic anti-radiation healthcare effect.

The invention relates to a paint for pattern-printed tableware and an implementation method thereof. The paint comprises the following components in percentage by mass: 10-35% of siloxane, 5-20% of filler, 1-10% of pigment, 1-5% of non-adhesive assistant, 1-5% of catalyst and the balance of water-soluble silica sol. The paint is simple to use, and has the advantages of low cost and favorable decorative effect; and the pattern can be customized to satisfy the market demands.

The invention discloses a phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material which is characterized in that the phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material is prepared by taking nitrogen-doped carbon nanofibers as a carrier and growing NiFe-LDH nanosheets on the surface of the nitrogen-doped carbon nanofibers in situ. Thepreparation method comprises an annealing process and a high-temperature phosphorus doping process. The phosphorus-doped ferronickel oxide nitrogen-doped carbon nanofiber composite material has the advantages of large specific surface area, good conductivity, stable physical and chemical properties, excellent electrochemical performance and the like.

The invention provides an absorptivity hemostatic micropowder of hydroxyethyl modified cotton fiber and a preparation method thereof, mainly solving the problem that the present hemostatic materials can not effectively stanch the wound caused by minimally invasive surgery. The particle size of the absorptivity hemostatic micropowder of hydroxyethyl modified cotton fiber is between 50mu m and 100mu m. The preparation method of the absorptivity hemostatic micropowder of hydroxyethyl modified cotton fiber comprises the main steps of alkalization treatment of cotton fiber, modification treatment of cotton fiber, supermicro grinding, crosslink sterilization and the like. The hemostatic micropowder made from hydroxyethyl modified cotton fiber can be directly applied to the wound of minimally invasive surgery in human body, and can be directly absorbed by human body without toxic or side effect, thus improving wound stanching speed and avoiding the problem of easy agglomeration in the process of micropowder storage.

The invention discloses a preparation method of a supercapacitor taking a laminar nickel aluminum and hydrotalcite nanomaterial as a positive electrode. The preparation method comprises the following steps: (1) preparing an AlOOH sol precursor; (2) dropwise adding a Ni(NO3)2 solution in the AlOOH sol precursor, and carrying out hydrothermal reaction for 1-48 hours at the temperature of 50-250 DEG C to obtain the laminar nickel aluminum and hydrotalcite nanomaterial; (3) taking the laminar nickel aluminum and hydrotalcite nanomaterial as a positive electrode material to prepare the positive electrode; (4) carrying out electrode activating treatment on the positive electrode; and (5) assembling the positive electrode and a negative electrode to form the supercapacitor. The supercapacitor is prepared by taking the laminar nickel aluminum and hydrotalcite nanomaterial as the positive electrode material, the laminar nickel aluminum and hydrotalcite nanomaterial has quite large specific surface area, the electrochemical activity of the laminar nickel aluminum and hydrotalcite nanomaterial, and therefore, the power density and the energy density of the supercapacitor are greatly improved.

The invention discloses a super-hydrophobic nano composite material coating with excellent mechanical stability and a preparation method of the super-hydrophobic nano composite material coating, and belongs to the technical field of preparation of super-hydrophobic composite coating materials. The super-hydrophobic nano composite material coating comprises a bottom film and a top film, the bottom film is an epoxy resin film layer doped with titanium dioxide and attached to the surface of a substrate, and the top film is an epoxy resin film layer doped with modified silicon dioxide and polymethylsilsesquioxane and located on the bottom film. The epoxy resin in the top film of the composite coating not only can coat micro / nano particles to prevent the micro / nano particles from falling off during long-term realization of a super-hydrophobic function, but also can form three-dimensional spatial crosslinking with the epoxy resin in the bottom coating, so that interface debonding of the upper coating and the lower coating is prevented, super-stable'welding 'of an interface is enhanced, and the service life of a super-hydrophobic coating system is prolonged.

The invention discloses a phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material, which is characterized in that the phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material is prepared by taking nitrogen-doped carbon nanofiber as a carrier and growing CoFe-LDH nanoparticles on the surfaces of the nitrogen-doped carbon nanofiber in situ.The preparation method comprises an annealing process and a high-temperature phosphorus doping process. The phosphorus-doped cobalt oxide iron-nitrogen-doped carbon nanofiber composite material prepared by the invention has the advantages of large specific surface area, good conductivity, stable physical and chemical properties, excellent electrochemical performance and the like.

The invention discloses a rhenium sulfide / nitrogen-doped biomass-based carbon fiber composite material with a double-defect structure. The preparation method is characterized in that rhenium sulfide nanosheets with interlayer defects grow on the surface of nitrogen-doped biomass-based carbon fiber in situ, and then, sulfur vacancies are introduced through annealing in a reducing Ar / H2 atmosphere,so that the rhenium sulfide / nitrogen-doped biomass-based carbon fiber composite material with a double-defect structure is obtained. The rhenium sulfide in the prepared composite material uniformly grows on the surface of the nitrogen-doped biomass-based carbon fiber, and the composite material has the advantages of large specific surface area, good conductivity, stable physical and chemical properties and the like. The one-dimensional interlayer defect structure provides interconnected channels so as to provide additional ion intercalation / deintercalation sites; besides, the vacancy-rich structure is beneficial to rapid adsorption of sodium ions and can change the charge distribution of the intrinsic state of the material, so that the purposes of increasing active sites and improving theconductivity of the material are achieved, and the material has excellent electrochemical performance.

The invention relates to the technical field of foam materials. The invention particularly discloses an environment-friendly antibacterial aromatic thermoplastic elastomer foaming material. The foaming material comprises the following components in parts by weight: 80-100 parts of SEBS, 8-15 parts of butadiene rubber, 5-8 parts of high-impact-resistance polystyrene, 5-10 parts of EVA, 3-5 parts ofa foaming agent, 2-4 parts of a cross-linking agent, 0.5-1 part of zinc stearate, 2-4 parts of white mineral oil and 10-20 parts of modified lavender particles. According to the invention, the modified lavender particles are adopted; volatilization of lavender aroma components can be effectively controlled; meanwhile, the antibacterial performance and deodorization of the foaming material and theproduct can be enhanced, and the advantages of deodorizing, ventilating, refreshing, incensing, expelling parasites and the like are achieved; the utilization rate of lavender can be increased, wasteand environmental pollution are reduced, and the lavender perfume is environmentally friendly and suitable for living goods and sports equipment such as soles, insoles, yoga mats and crawling mats.

The invention relates to a manufacturing method of screen cloth for shoes. The manufacturing method comprises the steps of 1 preparing a modifying agent for shoes, 2 preparing an anti-microbial spinning oil solution for shoes, 3 preparing modified polyester master batches for shoes, 4 preparing modified polyester monofilaments for shoes, and 5 manufacturing the screen cloth for shoes. The manufactured screen cloth for shoes has good anti-microbial healthcare effect.

The invention discloses a preparation method of a molecular imprinting desulfuration fiber membrane. The desulfuration fiber membrane is prepared from the following raw materials: calcium carbonate, stearic acid, white oil, gamma-aminopropyltriethoxysilane, benzothiophene, polyvinyl nitrile, polyurethane and tetraethoxysilane. The method has the advantages that calcium carbonate is subjected to dispersion modification, the problem that the calcium carbonate is easy to agglomerate is avoided, the affinity of the calcium carbonate to organic polymer is improved, the calcium carbonate is more closely combined with molecular imprinting particles, the calcium carbonate serving as a filler can further improve the tensile strength of fiber membrane, rapid and efficient adsorptive removal is realized through the improvement of the preparation method of molecular imprinting and serving the benzothiophene as a functional monomer, the desulfuration efficiency of the desulfuration fiber membrane is high, the desulfuration fiber membrane is pollution-free during use, a cycle use mode further greatly reduces the cost, the defects of the current various mainstream desulfuration methods can be overcome, and the demands on desulfurization facilities by industrial enterprises can be met through the adoption of the method.

The invention discloses a preparation method of a lithium titanate negative pole piece, the lithium titanate negative pole piece and a lithium ion battery containing the negative pole piece. The method comprises the following steps of mixing an EDOT monomer with a PSS solution, adjusting the pH value of the mixed solution to be acidic, and then putting the acidic solution in an ice water bath environment, and adding an ammonium persulfate solution to react; carrying out ion exchange and elution on the solution after the reaction; and carrying out rotary evaporation on the eluant to remove theredundant solvent to obtain a PEDOT: PSS solution, then adding a high-polarity organic solvent to dope to obtain a conductive polymer solution, and then adding the conductive polymer solution into a paste for preparing the lithium titanate negative pole piece and processing to obtain the lithium titanate negative pole piece, and then further preparing the lithium ion battery. The conductive performance of the lithium titanate negative pole piece is improved, and the lithium titanate negative pole piece is easy to coat and uniform in preparation, so that the discharge capacity and the cycling stability of the electrode material are improved as a whole, and the problem that the nano-scale powder electrode material is easy to agglomerate is solved.

The invention relates to the organosilicon monomer synthesis field, and particularly relates to a Cu-Cu2O-CuO ternary copper-based solid solution catalyst and its preparation method. The method comprises the following steps of: 1) taking a mixture composed of 0.5-40wt% of metal copper powder and 20-80wt% of copper oxide as a raw material, conducting heat treatment at a temperature of 600-1000DEG C for 0.5-12h under inert gas protection, and then carrying out ageing at a temperature of 300-600DEG C for 1-15h so as to obtain a ternary copper-based solid solution; and 2) subjecting the ternary copper-based solid solution from step 1) to shattering and milling to obtain the Cu-Cu2O-CuO ternary copper-based solid solution catalyst. The copper-based solid solution catalyst prepared in the invention shows high dimethyldichlorosilane selectivity and silicon power raw material conversion rate.

The invention provides a monochromatic organic master batch, a preparation method and an application thereof, and a color master batch, and belongs to the technical field of pigments. The monochromatic organic master batch is prepared from the following raw materials in percentage by weight: 41 to 80 percent of organic pigment, 15 to 59 percent of polymer material and not more than 10 percent of dispersing agent. The monochromatic organic master batch is prepared by mixing the raw material components under a heating condition and then extruding. Wherein at least part of the polyolefin resin isin a molten state in the mixing process. The monochromatic organic master batch has good dispersibility and tinting strength. The preparation method comprises the following steps: mixing the raw material components under a heating condition, and carrying out extrusion molding. The method is simple, easy to operate, short in time, high in efficiency and low in influence on color masterbatch cost.The monochromatic organic master batch can be used for preparing color master batch, the production process is dust-free, environment-friendly and clean, the production line is easy to clean, and theprocessing efficiency and color difference control rate of the color master batch can be effectively improved. The color master batch containing the monochromatic organic master batch is flexible in formula design and relatively low in cost.

The invention particularly discloses an environment-friendly degradable aromatic polyurethane foaming material. The foaming material is formed by mixing and foaming a component A and a component B, wherein the component B is aliphatic isocyanate, and the component A comprises the following components in parts by weight: 80 to 100 parts of composite polyol, 4 to 8 parts of a foaming agent, 0.5-0.8parts of a catalyst, 0 to 1 part of a crosslinker, 0.5 to 1 part of a foam stabilizer and 15 to 25 parts of modified lavender particles; wherein the composite polyol consists of plant oil-based polyether polyol, polypropylene oxide ether and polyurethane insole alcoholysis product. According to the invention, the modified lavender particles are adopted; wherein the lavender antibacterial foam material can effectively control volatilization of lavender aroma components, so that the material achieves lasting aroma efficacy, covers peculiar smell, can enhance the antibacterial performance of thefoam material and products. The material has the advantages of odor removal, ventilation, refreshing, incense and insect expelling and the like, can improve the utilization rate of lavender, reduce waste and improve the degradation degree, and is green and environment-friendly.

The invention relates to the technical field of nano catalytic materials, in particular to a nickel monatomic catalyst and a preparation method and application thereof. According to the preparation method, chitosan sol is adopted to provide a carbon source, a sodium silicate aqueous solution is adopted to provide a silicon source, the chitosan sol and the sodium silicate aqueous solution are mixed with a nickel salt aqueous solution within a proper pH range, and nickel-chitosan-sodium silicate ternary composite hydrogel with high nickel dispersion is rapidly formed under the supramolecular complexing action of the three components; the temperature is 243.1 DEG C, and the pressure is gt; and carrying out synchronous drying and carbonization treatment on the supercritical fluid with the pressure of 6.39 kPa to prepare the nickel monatomic catalyst. The preparation method is simple to operate, prevents excessive degradation of a pore network structure of the hydrogel, can furthest avoid the problem that metal atoms are easy to agglomerate due to high-temperature carbonization treatment in a conventional technology, effectively improves the loading capacity of nickel monatomic on a carbon-based carrier, and endows the nickel monatomic catalyst with excellent catalytic performance.

The invention relates to purification formaldehyde inner wall water-resisting putty. The purification formaldehyde inner wall water-resisting putty is prepared from the following raw materials in parts by weight: 100 to 200 parts of white cement, 800 parts of heavy calcium, 3 to 6 parts of dispersible rubber powder, 3 to 6 parts of cellulose ether, 3 to 6 parts of starch ether, 5 to 10 parts of nano titanium dioxide, and 5 to 10 parts of molecular sieve. The putty powder has good application property, high strength and good water resistance, and has an absorption and degradation effect for formaldehyde. A porous structure of a molecular sieve contained in the putty powder can absorb the formaldehyde in the air, and can rapidly reduce the content of the formaldehyde in the air, and the contact catalytic effect of the bio-enzyme and the photocatalytic effect of nano titanium dioxide can thoroughly decompose harmful substances such as formaldehyde and TVOC; and by virtue of the absorptionand degradation double effects, the formaldehyde in the air can be rapidly reduced, the formaldehyde pollution can be thoroughly solved, and the purification formaldehyde inner wall water-resisting putty is particularly suitable for the indoor decoration.

The invention relates to a preparation method for a double antibacterial non-woven fabric. The preparation method for the double antibacterial non-woven fabric comprises the following steps of soakingthe non-woven fabric in a solution containing zinc salt and then drying the non-woven fabric; putting the non-woven fabric in a solution containing silver salt, 2-methylimidazole and an adhesive andthen drying the non-woven fabric; and soaking non-woven fabric in a solution containing a reducing agent and then drying the non-woven fabric. According to the preparation method for the double antibacterial non-woven fabric, a ZIF-8 structure is loaded on non-woven fabric through an in-situ growth method, silver ions are introduced into the ZIF-8 structure, later the silver ions are reduced intonano silver, and the non-woven fabric with double antibacterial properties is obtained. By adopting the method for preparing the antibacterial non-woven fabric through in-situ growth, dispersion uniformity and adhesion of the ZIF-8 structure on the non-woven fabric can be ensured, and nano silver is loaded on the ZIF-8 structure, so that the problem that nano silver is prone to agglomeration whenintroduced into the non-woven fabric through the traditional method is also avoided. The antibacterial non-woven fabric obtained through the method has excellent antibacterial durability and washing resistance.

The invention provides a three-dimensional graphene microchip bioplastic reinforcing master batch and a preparation method. The preparation method comprises the following steps: adding inorganic nanoclay, an acrylamide monomer, collagen, a natural biological crosslinking agent and a graphene microchip into water, allowing dispersing uniformly, then adding an initiator and a catalyst, allowing a reaction to obtain nanocomposite three-dimensional gel, then dispersing the nanocomposite three-dimensional gel in a Fe(OH)3 colloidal solution, pulverizing into powder after freeze-drying, finally mixing the powder with carrier resin and a dispersing agent, and performing extrusion and granulation to obtain the three-dimensional graphene microchip bioplastic reinforcing master batch. According to the method, polydopamine modification is adopted to obtain hydrophilic graphene microchips, and then a colloid is utilized to encapsulate the graphene microchips into three-dimensional nanogel micropores, so that the problem of high possibility of agglomeration of the graphene microchips is effectively avoided, the dispersibility of the graphene microchips in a plastic matrix is effectively ensured, and the reinforcing performance of the graphene microchips is better played.

The invention discloses a use of carboxyl-terminated hyperbranched polyester as a luminescent material. According to an experiment, the carboxyl-terminated hyperbranched polyester can emit blue luminescence with relatively strong intensity under near ultraviolet light excitation, and compared with conventional inorganic fluorescent powder, the carboxyl-terminated hyperbranched polyester can disperse into LED packaging resin better, so that the problem of easy agglomeration of fluorescent powder caused by poor compatibility between inorganic fluorescent powder and organic packaging resin is avoided. In addition, because expensive rare earth elements are not needed, the problem that production costs of inorganic blue fluorescent powder are relatively high is solved.

The invention belongs to the technical field of synthesis of high molecular composite materials and in particular relates to a high-mechanical-strength GO / TPU (Graphene Oxide / Thermoplastic Polyurethane) in-situ polymerization method. A specific implementation technology of the in-situ polymerization method comprises the following steps: taking graphene oxide, polypropylene glycol-4000, toluene diisocyanate and 1,4-butylene glycol as raw materials; after carrying out modification on the graphene oxide by adopting glacial acetic acid and didecyldimethylammonium bromide, combining with the polypropylene glycol-4000 to form a modified graphene oxide / polypropylene glycol-4000 mixture; then carrying out in-situ polymerization on the mixture, the toluene diisocyanate and the 1,4-butylene glycol to obtain high-mechanical-strength GO / TPU. A GO / TPU material prepared by the method has excellent mechanical strength and can become a substitute with more excellent performance in the fields includinga mechanical industry and the like.

The invention relates to a noble metal porous nanofilm and a preparation method thereof. The noble metal porous nanofilm is assembled from noble metal nanoparticles with a particle size of 5 to 20 nm. There are small holes between the noble metal nanoparticles, and the pore diameter is 1 to 10 nm. The thickness of the precious metal porous nanofilm is 0.2-1 μm. The preparation method is as follows: 1) Dissolve the precious metal precursor and surfactant in water to obtain a precursor solution; 2) Heat the precursor solution to boiling, add the reducing agent when bubbles are generated in the precursor solution, and continue heating until the nanometer The particles gather to form an obvious thin film at the water-air interface; 3) Separate the thin film to obtain a precious metal porous nanofilm. The precious metal porous nanofilm obtained by the invention has good catalytic activity and stability.