721results about "Zinc oxides/hydroxides" patented technology

The invention relates to the technical field of composite film preparation, in particular to a multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film and a preparation method thereof.The multi-layer co-extrusion nano ceramic coating high-barrier medicine packaging composite film comprises a base material layer, a gas barrier layer, a bonding transition layer and a nano ceramic functional coating; the base material layer comprises the following components in parts by mass: 80-100 parts of biaxially oriented polypropylene; 20 to 30 parts of metallocene linear low density polyethylene; 5 to 8 parts of nano titanium dioxide; 0.5 to 1 part of beta-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid; and 0.3 to 0.6 part of calcium stearate. Through the multi-layer co-extrusion and gradient curing technology and the five-layer co-extrusion technology, it is ensured that the thickness of a base film is uniform and interlayer bonding is firm, the adhesive force of the coating is enhanced through plasma surface treatment, and activity retention and uniform distribution of functional components are guaranteed through the segmented curing strategy of the nano ceramic coating; compared with a traditional hot-pressing compounding or solvent coating process of the composite film, the energy consumption and the solvent residue risk are greatly reduced, meanwhile, the production efficiency and the product consistency are improved, and large-scale application is provided for medicine packaging.

The invention provides anti-ionizing radiation powder with a core-shell heterogeneous gradient structure and a preparation method and application of the anti-ionizing radiation powder, and belongs to the field of radiation protection.The preparation method of the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure comprises the following steps that high-atomic-number metal salt is added into deionized water, aging, washing, drying and primary calcination are conducted in sequence, and the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure is obtained; a core layer is obtained; the core layer and low-atomic-number metal salt are added into deionized water, aging, washing, drying and primary calcination are sequentially conducted, and preliminary wrapping powder with the high-atomic-number metal core layer wrapped by low-atomic-number metal is obtained; and adding the preliminarily wrapped powder and rare earth salt into deionized water, and sequentially performing aging, washing, drying, primary calcining, secondary calcining, airflow crushing and air rotation purging to obtain the anti-ionizing radiation powder with the core-shell heterogeneous gradient structure. Through cooperation of the core-shell heterostructure, the high-atomic-number oxide, the low-atomic-number oxide and the multi-element rare earth element, the shielding performance of the material is remarkably improved.

The invention belongs to the technical field of preparation of sensor materials, and particularly relates to a room-temperature formaldehyde sensor material based on a catalytic principle as well as preparation and application of the room-temperature formaldehyde sensor material. The polyphenol is adsorbed on the surface of the semiconductor metal oxide through chelation, then noble metal ions are introduced, and the polyphenol on the surface of the semiconductor metal oxide can capture the noble metal ions and reduce and stabilize the noble metal ions on the surface of the semiconductor metal oxide; the noble metal nanoparticles are anchored on the surfaces of the semiconductor metal oxide nanoparticles, the original morphology of the semiconductor metal oxide is maintained, and the noble metal nanoparticles are loaded on the surfaces of the semiconductor metal oxide nanoparticles. The nano composite material not only has the intrinsic electrical and thermodynamic properties of semiconductor metal oxide, but also combines the catalytic characteristics of noble metal nanoparticles, so that the lower detection limit of formaldehyde is reduced to 3ppb, and the sensitivity of the sensor is remarkably improved. The preparation method of the room-temperature formaldehyde sensing material is simple and suitable for large-scale production, the raw materials are simple and easy to obtain, the cost is low, and the materials are environment-friendly.

The invention relates to the field of gas sensors, and discloses a hydrogen sulfide gas sensor and a method for detecting the concentration of hydrogen sulfide in gas. The hydrogen sulfide gas sensor comprises a substrate and a gas sensitive material, a cavity is formed in the substrate, the gas-sensitive material is located above the cavity, and the two ends of the gas-sensitive material are connected with the gold electrodes on the substrate; the gas sensitive material comprises graphene fiber and metal oxide loaded on the graphene fiber. The metal oxide is selected from one or more than two of oxides of Zn, Cd, Cu, Ni, Pd, Pt, Co, Ir, Fe, Mn, Cr, Mo, W, V, Ti, Mg and Al; the specific surface area of the gas sensitive material is 80-150m < 2 > / g; the loading capacity of the metal oxide is 0.05 to 5 weight percent. The hydrogen sulfide gas sensor can be self-heated, has high sensitivity to hydrogen sulfide gas, and is suitable for being applied to the field of gas monitoring.

The invention discloses a method for comprehensively treating zinc-containing sulfuric acid slag and blast furnace cloth bag ash, which comprises the following steps of: uniformly mixing the zinc-containing sulfuric acid slag, the blast furnace cloth bag ash, a calcium additive and a carbonaceous reducing agent according to the weight ratio of 10: (3-5): (2.5-4): (1.5-3); smoke dust generated by roasting is subjected to oxidation dust removal, cooling separation and desulfurization treatment, and zinc-containing oxide, sulfuric acid and sulfite are obtained; and cooling the roasted material with water, crushing and grinding, and sequentially carrying out high-intensity magnetic separation and low-intensity magnetic separation to obtain high-valued reduced iron powder. The final iron grade can reach 95% or above, and the content of sulfur and zinc is lower than 0.1%. According to the method, the industrial solid waste sulfuric acid slag and the blast furnace cloth bag ash can be converted into the high-valued reduced iron powder, comprehensive recycling of resources is achieved, and environmental and soil pollution caused by stacking is avoided.

A nano composite, a nanoparticle ink composition including a solvent and the nanocomposite, and a light-emitting device including a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode, wherein the interlayer includes an emission layer, and at least one layer included in the interlayer is made from the nanoparticle ink composition. The nano composite includes: a metal oxide nanoparticle; and a chelating ligand bonded to a surface of the nanoparticle and including a cyclic moiety.

The invention provides a lithium metal negative electrode current collector, a preparation method thereof and a lithium metal battery, and the method comprises the following steps: carrying out single-side treatment on carbon cloth in oxygen plasma for 8-12 seconds to obtain gradient activated carbon cloth; the preparation method comprises the following steps: dissolving Zn (NO3) 2 and urotropine in water, and slowly adding ammonia water to obtain a colorless and transparent precursor solution; and transferring the precursor solution into a polytetrafluoroethylene liner, carrying out hydrothermal reaction on the precursor solution and gradient activated carbon cloth, cooling to room temperature, and washing and drying to obtain the lithium metal negative electrode current collector. The three-dimensional carbon cloth current collector with longitudinal zinc oxide gradient distribution is obtained through single-sided oxygen plasma treatment and a one-step hydrothermal method, and meanwhile, lithium is induced to deposit from bottom to top and uniformly grow in a three-dimensional carbon cloth framework with ZnO lithium-loving sites gradient distribution by effectively controlling the concentration distribution of ZnO, so that the formation of lithium dendrites is inhibited; the cycle stability of the electrode is improved, and long cycle stability and high energy density of the lithium battery are realized.

The invention discloses a method for green synthesis of a zinc oxide nanosheet from an aerospace mutant strain PS04-17. The invention provides a new application of a space mutant strain PS04-17 in green synthesis of zinc oxide nanosheets, research shows that the PS04-17 strain has efficient capability of converting zinc nitrate hexahydrate into zinc oxide nanosheets, the conversion efficiency is high, the generated zinc oxide nanosheets are flat and smooth in surface and clear in edge, the sheet structure is presented, and the zinc oxide nanosheets have good application prospects. And orderly vertical or staggered folding is realized. The zinc oxide nanosheets are synthesized through the aerospace mutant strain PS04-17, more possibilities are provided for a green and innovative synthesis method, more feasible schemes are provided for synthesis of nano-zinc oxide through a microbiological method, and the synthesis method is efficient, simple, convenient, safe, low in cost, environmentally friendly and suitable for industrial production. The prepared zinc oxide nanosheet can be better applied to the fields of agriculture, industry, medical treatment and the like.

The invention relates to a preparation method of a pectin-derived carbon-coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The method comprises the following steps: dropwise adding a tin tetrachloride solution and an acidified zinc oxide solution into a pectin solution to obtain a metal ion-pectin dispersion liquid; adding ammonia water to obtain a pectin precursor solution; freezing and solidifying with liquid nitrogen; and after freeze-drying, roasting for 3-5 hours to obtain the pectin derived carbon coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The reversible specific capacity of the obtained composite material reaches 1339 mA h g <-1 > after 100 cycles under the current density of 0.2 A g <-1 >.

The invention discloses a preparation method for regulating the morphology of zinc oxide, and belongs to the technical field of metal oxides, and the preparation method comprises the following steps: (1) preparing a zinc salt solution and an alkaline solution; (2) respectively inputting the zinc salt solution and the alkaline solution into an ultrasonic microreactor, enabling the zinc salt solution and the alkaline solution to be in contact in the conveying process in the ultrasonic microreactor, and reacting under the ultrasonic action to form zinc oxide slurry; and (3) outputting the zinc oxide slurry from the ultrasonic microreactor, filtering, washing, drying, crushing, and screening to obtain the zinc oxide powder. Controllable synthesis of nano-zinc oxide with different morphologies is realized by utilizing the super-strong mixing capacity of the ultrasonic pipeline reactor.

The present application belongs to the technical field of nanometer material, and discloses a kind of sheet porous nanometer zinc oxide and its preparation method and application.The present application first prepares basic zinc carbonate precursor, then nitrogen is passed into, the pressure of system is >0.4MPa and <0.6MPa, hydrothermal reaction is carried out, and the reaction product is calcined, and sheet porous nanometer zinc oxide is prepared.The sheet porous nanometer zinc oxide prepared by the method of the present application has uniform and regular sheet porous structure, the holes on the sheet are uniform and regular, dense, small in particle size, large in specific surface area, and can be widely applied in the degradation of organic pollutants in photocatalytic system and the field of heavy metal adsorption.The preparation method of the present application can obtain raw materials easily and can be mass-produced.

A method of forming a zinc oxide / borate nanocomposite that includes mixing a borate solution including boric acid in a polar solvent, and a zinc solution including a zinc carboxylate complex including a zinc ion and a coordinated carboxylate ligand to form a precursor mixture. Further, a polyol is added to the precursor mixture to form a reaction mixture, followed by heating the reaction mixture to 100 to 150° C. to form a solid intermediate product and calcination the solid intermediate product at 500 to 800° C. to form the zinc oxide / borate nanocomposite. The nanocomposite includes Zn3(BO3)2 and ZnO.

The invention discloses a composite electrocatalyst for electrochemical synthesis of H2O2 and a preparation method of the composite electrocatalyst, and belongs to the technical field of catalysts for electrochemical synthesis of hydrogen peroxide and preparation of the catalysts. The problems of low catalyst activity, selectivity and stability in the existing H2O2 electrochemical synthesis process are solved. The ZnO / porous carbon composite electrocatalyst is obtained by taking carbon spheres hydrothermally synthesized from glucose as a carbon source, taking eutectic salt of zinc chloride and potassium chloride as a zinc source and a pore-forming agent at the same time, mixing the carbon spheres and the eutectic salt, performing one-step pyrolysis treatment in an inert atmosphere, and completing carbonization, ZnO loading and porous structure construction. The electrocatalyst shows H2O2 selectivity up to 95% under an alkaline condition, high yield of 7.02 mol g <-1 > h <-1 > under 0.2 V vs RHE and excellent cycling stability, and the efficiency and practicability of electrochemical synthesis of H2O2 are remarkably improved.

The invention provides a preparation method of modified zinc oxide nanoparticles as well as a product and application thereof, the preparation method comprises two steps of solvothermal reaction and surface modification, combines the advantages of chemical reaction formaldehyde removal of organic amine substances and photocatalytic degradation formaldehyde removal of inorganic nanoparticles, and has the characteristic of efficient formaldehyde removal. Siloxane groups on the surfaces of the modified zinc oxide nanoparticles effectively improve the hydrophobicity of the surfaces of the zinc oxide nanoparticles, and prevent dust in air from being attached to damage the formaldehyde removal performance, so that the formaldehyde removal function is played for a long time.

The invention belongs to the technical field of photocatalytic water dissociation, and relates to a method for enhancing the photocatalytic oxygen evolution reaction efficiency of a nanorod array material through a magnetic field. According to the invention, ZnO nanorod arrays are placed at three relative positions of a cubic parallel uniform magnetic field with adjustable magnetic field intensity for photocatalytic OER. The constructed magnetic field regulation and control device is mainly composed of two parallel coils which are connected in series. The electromagnetic effect is generated through the coil, and rapid adjustment of the magnetic field is facilitated. And magnetic induction lines between the parallel coils connected in series are uniformly distributed in parallel, so that the direction of a magnetic field can be regulated and controlled. Due to the existence of the magnetic fields which are uniformly distributed in parallel among the parallel coils which are connected in series, photon-generated carriers moving in catalyst particles move in opposite directions under the action of Lorentz force. And photo-generated electrons (e-) and photo-generated holes (h +) are separated, so that the photocatalytic reaction efficiency is improved. Therefore, the magnetic field regulation and control device can meet the regulation and control of catalytic reaction.

The invention discloses a method for in-situ lossless repair of an attenuated lithium manganate positive electrode material, which specifically comprises the following steps: adding the attenuated lithium manganate material into a lithium hydroxide solution, supplementing lithium to an original value by a hydrothermal method, repairing the component and structure defects of attenuated LiMn2O4 by combining high-temperature roasting, and recycling and regenerating lithium manganate particles with severely attenuated capacity. The lithium manganate positive electrode material is directly recovered by the lossless method, and the chemical components and crystallinity of the invalid positive electrode material in various health states are reconstructed, so that the invalid positive electrode material can be repeatedly used in the lithium ion battery. Finally, the treated recycled powder material is coated by a metal organic framework (MOFs) self-assembly method, so that the electrochemical performance of the treated powder material is further improved. The method is simple, environmentally friendly and low in energy consumption, has obvious advantages compared with a traditional hydrometallurgy battery recovery method, and lays an important foundation for sustainable manufacturing of energy materials.

Provided are: zinc oxide powders from which a cosmetic capable of exhibiting excellent visible light transmittance and ultraviolet shielding ability when applied to the skin can be prepared; and a composition for an oil-dispersible cosmetic and a cosmetic in which the zinc oxide powders are blended.　Zinc oxide powders according to the present invention are characterized in that D50 in the number distribution obtained from a transmission electron microscope image is 100-200 nm, the aspect ratio is 1.1-1.4, and the crystallite diameter obtained from an X-ray diffraction spectrum is 70-200 nm. Moreover, a composition for an oil-dispersible cosmetic according to the present invention is characterized in that the zinc oxide powders according to the present invention are dispersed in oil. A water droplet-in-oil emulsion cosmetic according to the present invention and an oil droplet-in-water emulsion cosmetic according to the present invention are characterized in that the composition for an oil-dispersible cosmetic according to the present invention is blended or the zinc oxide powders according to the present invention are blended. A powder cosmetic according to the present invention is characterized in that the zinc oxide powders according to the present invention are blended.

The invention discloses a preparation method of a lanthanum ferrite / zinc oxide composite material, which comprises the following steps: preparing lanthanum ferrite LFO, ultrasonically stirring ferric nitrate nonahydrate, lanthanum nitrate hexahydrate and a dispersing agent in a hydrothermal solvent to obtain a mixed solution, preparing an LFO / ZnO composite material, dispersing the LFO prepared in the step S1 and zinc acetate in ethanol, performing ultrasonic treatment, heating and stirring, and condensing and refluxing to obtain the LFO / ZnO composite material. Cooling, and continuously stirring in an ice-water bath; dropwise adding a NaOH ethanol solution at the temperature of 0 DEG C, and stirring for 2 hours; adding deionized water, stirring, centrifuging to remove the supernatant, dispersing the precipitate powder in ethanol, and carrying out hydrothermal reaction; after the hydrothermal reaction is finished, centrifuging the solution, and after centrifugation is finished, pouring out the solution to obtain a precipitate; washing with deionized water and an ethanol solution, drying the precipitate, and calcining the dried powder in a muffle furnace to obtain a p-n type LFO / ZnO composite material; according to the method, the size of lanthanum ferrite can be accurately regulated and controlled through a cooperative regulation strategy of the solvent proportion and the ligand size, and different types of gases can be accurately distinguished.

The invention relates to the field of materials, and discloses a three-dimensional graphene / metal oxide composite pellet and a preparation method and application field thereof, the three-dimensional graphene / metal oxide composite pellet comprises a graphene pellet and a metal oxide loaded on the graphene pellet; wherein the specific surface area of the three-dimensional graphene / metal oxide composite sphere is 50-500m < 2 > / g. In the obtained three-dimensional graphene / metal oxide composite sphere, the metal oxide is uniformly loaded on the surface of the graphene sphere, and the sphere internally has a rich pore structure, so that the application of gas sensing, catalysis, energy storage and the like is facilitated.

The invention relates to bark-like nano-zinc oxide and a preparation method thereof, and belongs to the technical field of liquid-phase synthesis of nano-zinc oxide. According to the invention, the nano zinc oxide material with bark-like microstructure is prepared by regulating and controlling the liquid phase environment and the thermodynamic and kinetic parameters of the reaction. The material has obvious layering sense and pore characteristics, the material is endowed with significantly enhanced physicochemical characteristics, for example, the BET specific surface area is significantly increased, and meanwhile, the high porosity and the nanocrystal boundary effect have a synergistic effect, so that active oxygen species and zinc ion antibacterial active species can be efficiently generated, and the antibacterial performance of the material is significantly improved. An antibacterial experiment shows that the antibacterial rate of the material to escherichia coli and staphylococcus aureus exceeds 99.9%, and the antibacterial rate of the material to candida albicans exceeds 99.0%. The material has application potential in the fields of medical dressings, antibacterial textiles, water purification and the like.

The invention discloses an electromagnetic wave absorbing material CoFe2O4 / ZnO-RGO with a ternary heterostructure as well as a preparation method and application of the electromagnetic wave absorbing material CoFe2O4 / ZnO-RGO, and belongs to the technical field of electromagnetic wave absorption. According to the material, a novel heterostructure with a multi-scale interface and a three-dimensional conductive network is constructed by compounding magnetic loss type CoFe2O4, dielectric loss type ZnO nanorods and resistance loss type RGO. Wherein the ZnO nanorod not only serves as a dielectric loss body, but also effectively enhances the structural anisotropy and the interface polarization effect of the material, and cooperates with the magnetic loss of CoFe2O4 and the resistance loss of RGO to jointly optimize impedance matching and improve the electromagnetic attenuation capability, so that the material shows excellent wave-absorbing performance under various thickness and even ultrathin conditions. The material source is wide, the cost is low, the preparation process is green, simple and convenient, the material is suitable for large-scale production, and an effective material solution is provided for electromagnetic wave absorption application in the national defense and civil fields.

The present application provides a method for resource utilization of dust ash solid waste, including raw material pre-washing and filtration process, potassium chloride soaking and evaporation process, raw material storage process, premixing process, ingredient supply process, mixing process, roasting and reduction process, slag cooling process, flue gas cooling waste heat recovery process and flue gas desulfurization zinc collection process, premixing dust ash filtration sludge, etc., control the uniformity of moisture, add reducing agent and heating agent after ingredient mixing, and send to roasting and reduction system for reduction roasting, chloride ion, sulfur and zinc oxide are vaporized and discharged from the kiln with flue gas, zinc oxide is collected, and iron-containing kiln slag is obtained after cooling, and sintering, blast furnace and steelmaking raw materials with an iron grade of about 50% are obtained. The present invention adopts wet-based water washing and rotary kiln fire method to remove zinc, potassium, sodium and chlorine, so as to achieve the purpose of recovering iron-containing materials; under the condition of ensuring that the zinc removal rate is 92%, the effective separation of iron, zinc, potassium and sodium is achieved, and the comprehensive utilization of resources is realized.

The invention provides a lithium manganate composite material and a preparation method thereof, a positive plate, a battery and power-related equipment, and relates to the technical field of lithium batteries. A metal organic framework coating layer is formed on the surface of a lithium manganate particle through metal reaction of an organic ligand and a metal salt, and the metal organic framework coating layer is converted into the lithium manganate composite material formed by coating the lithium manganate particle with a composite material of a metal oxide and carbon through a pyrolysis process. The lithium manganate composite material provided by the invention is simple in preparation method and low in cost, and has a wide industrial application prospect.

The invention discloses a preparation method of a composite material, the composite material, a photoelectric device and a display device. The preparation method of the composite material comprises the following steps: providing a precursor solution, wherein the precursor solution comprises Mxene, a metal cation source and a first solvent; carrying out hydrothermal treatment to obtain an inorganic semiconductor particle / Mxene composite material solution; the inorganic semiconductor particle / Mxene composite material solution is subjected to microwave treatment, the composite material is obtained, and the composite material comprises inorganic semiconductor particles and Mxene quantum dots. According to the preparation method of the composite material, the inorganic semiconductor particles and the Mxene quantum dots have relatively strong electric field stability, so that the photoelectric device comprising the inorganic semiconductor particles and the Mxene quantum dots has relatively good luminescence performance.

The present invention discloses a sub-zinc oxide production sedimentation and collection device, comprising a base, the upper end of the base is fixedly connected to a collection box through a fixed rod, the upper end of the collection box is fixedly connected to a feed pipe, and the lower end of the feed pipe is fixedly connected to a collection bucket; a collection mechanism, the collection mechanism comprises two material receiving boxes symmetrically fixedly connected to the inner wall of the collection box, the inner wall of the material receiving box is rotatably connected to a first rotating shaft, the side wall of the first rotating shaft is fixedly sleeved with a silk sleeve, the inner wall of the material receiving box is rotatably connected to a second rotating shaft, the upper end of the second rotating shaft is fixedly connected to a glass material attachment cylinder, and the side wall of the silk sleeve is fitted with the inner wall of the glass material attachment cylinder. In the present invention, driven by the incoming flue gas, friction is generated between the silk layer and the glass material attachment cylinder, and static electricity is generated on the surface of the glass material attachment cylinder, and the sub-zinc oxide powder in the flue gas is adsorbed and collected, and conveyed by a conveyor belt, which is simple and convenient to collect, does not require manual labor, and saves time and effort.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

A silicon-modified zinc oxide material, wherein the silicon-modified zinc oxide material (i) has a BET surface area of at least 50 m2 / g, (ii) has a Si:Zn atomic ratio in the range of 0.001 to 0.5:1 and (iii) is in the form of a shaped unit selected from a pellet, extrudate or granule, or a wash-coat on a monolith support. The silicon-modified zinc oxide material has improved resistance to thermal sintering and may be used as a catalyst or sorbent material.

The invention discloses a multifunctional composite flexible fabric which has multiple functions of radiation refrigeration, energy collection, hydrophobicity and antibiosis. The composite flexible fabric is composed of a plurality of electrostatic spinning fiber layers, and all the layers are formed through electrostatic spinning in sequence from top to bottom. Comprising at least two polymer electrospinning fiber layers and at least one nanometer functional electrospinning fiber layer, the nanometer functional electrospinning fiber layer is a middle interlayer, and the nanometer functional electrospinning fiber layer and the polymer electrospinning fiber layers located on the upper surface and the lower surface respectively form a sandwich structure. The invention also discloses a preparation method of the flexible fabric, and the flexible fabric is prepared by electrostatic spinning of PVDF or a series of polymer solutions thereof and a polymer solution modified by adding functional nanoparticles by using an electrostatic spinning method. The preparation method can effectively regulate and control the form of the nanofiber and the functions of the nanoparticles, so that the functional scattering nanoparticles and the nanofiber generate a synergistic effect, and the functional fabric with thermal management, energy collection and antibacterial properties is integrated.

This invention discloses a multifunctional composite flexible fabric with multiple functions including radiative cooling, energy harvesting, hydrophobicity, and antibacterial properties. The composite flexible fabric consists of several electrospun fiber layers, each formed sequentially by electrospinning in a top-to-bottom order. It includes at least two polymer electrospun fiber layers and at least one nanofunctional electrospun fiber layer, wherein the nanofunctional electrospun fiber layer serves as an intermediate sandwich layer, forming a sandwich structure with the polymer electrospun fiber layers located on the upper and lower surfaces. This invention also discloses a method for preparing this flexible fabric, using electrospinning to prepare it by electrospinning a PVDF or related polymer solution and a polymer solution modified with functional nanoparticles. This preparation method can effectively control the morphology of the nanofibers and the functions of the nanoparticles, enabling a synergistic effect between the functional nano-scattering particles and the nanofibers, resulting in an integrated functional fabric with thermal management, energy harvesting, and antibacterial properties.

The invention belongs to the technical field of flexible pressure sensors, and provides a flexible pressure sensor containing a metal oxide / carbon composite material and a preparation method thereof. The flexible pressure sensor containing the metal oxide / carbon composite material comprises flexible electrodes and a sensitive layer, the flexible electrodes comprise an upper flexible electrode and a lower flexible electrode, and the sensitive layer is located between the upper flexible electrode and the lower flexible electrode; the sensitive layer comprises elastomers and conductive sponge, the elastomers comprise an upper elastomer and a lower elastomer, and the conductive sponge is located between the upper elastomer and the lower elastomer; the conductive sponge is melamine sponge containing a metal oxide / carbon composite material. According to the invention, the sensitivity of the flexible pressure sensor is improved by using the rapid signal transduction of the micro-cone structure and the quantum tunneling effect among the multi-scale structures; the sponge serves as a flexible substrate to relieve stress concentration, and the response range of the flexible pressure sensor is expanded; the elastomer is introduced to disperse the pressure of the flexible sensor, and the linearity of the flexible sensor is widened.