31 results about "Nanomesh" patented technology

The invention discloses a mechanically interlocked isohydrocarbon-like structure hydrogel and a preparation method thereof, and belongs to the technical field of hydrogel sensing. The preparation method of the mechanically-interlocked isohydrocarbon-like structure hydrogel comprises the following steps: firstly, preparing a carbon nano network solution by using hydroquinone; and then mixing the carbon nano network solution, acrylamide, water, a cross-linking agent and a photoinitiator, and treating under ultraviolet irradiation to obtain the hydrogel. The preparation method comprises the following steps: introducing a three-dimensional carbon nano network, blending the three-dimensional carbon nano network with an acrylamide monomer, and carrying out in-situ free radical polymerization to construct the mechanical interlocking isohydrocarbon-like structure hydrogel. The carbon nano network provides a continuous porous framework, a polyacrylamide chain segment is embedded into pores of the carbon nano network in the polymerization process, and a stable isohydrocarbon-like structure is formed through physical winding, space nesting and mechanical interlocking. The prepared hydrogel has excellent mechanical property, adhesion property and strain response capability, and provides a reliable and economical material basis for a flexible strain sensing function.

The invention belongs to the field of photoelectrocatalysis, and particularly relates to a Cu / Cu3P-coated TiO2 nano-mesh photoelectrode, preparation thereof and application of the Cu / Cu3P-coated TiO2 nano-mesh photoelectrode in photoelectric reduction ammonia preparation and photoelectric oxidation, the Cu / Cu3P-coated TiO2 nano-mesh photoelectrode comprises a titanium substrate, a TiO2 nano-mesh growing on the surface of the titanium substrate in situ, and copper-based biphase nano-particles uniformly dispersed and distributed on the TiO2 nano-mesh; the TiO2 nano net is a three-dimensional net-shaped material which is formed by interweaving TiO2 nano wires; the copper-based dual-phase nano particles comprise nano Cu particles and nano Cu3P particles, and a heterogeneous interface exists between the copper-based dual-phase nano particles and the TiO2 nano net. The electrode disclosed by the invention has the characteristics of excellent multiple functions of photoelectrocatalytic oxidation and photoelectrocatalytic reduction, and is excellent in photoelectrocatalytic performance.

The invention discloses a lithium manganate conductive material and a preparation method thereof, and the lithium manganate conductive material comprises a lithium manganate inner net layer which is a nano network layer formed by connecting lithium manganate crystal grains; the graphene and / or carbon nanotube conductive carbon outer net layer is deposited on the surface of the inner net layer. The lithium manganate crystal grains are uniform and fine, and the crystal grains are of a continuous net-shaped arrangement structure. Dissolving and mixing the polymer nanofiber, manganese salt, lithium salt and M-doped salt to form gel, drying, and carrying out two-stage programmed heating calcination in an oxygen-containing atmosphere to obtain a lithium manganate nano inner net layer; ultrasonically dispersing the lithium manganate nano inner net layer in water, adding acidified carbon nanotubes and / or graphene oxide dispersion liquid, and depositing the acidified carbon nanotubes and / or graphene oxide dispersion liquid on the surface of the inner net layer to form a conductive carbon outer net layer. The obtained lithium manganate conductive material has a continuous large-area two-dimensional network structure, shows high conductivity, high specific capacity and excellent cycling stability, and can be widely applied to the fields of lithium ion batteries, electrochemical lithium extraction, lithium ion adsorption and the like.

The application discloses a preparation method of Al / NH4CuF3 metastable intermolecular complex. The method is characterized in that: firstly, NH4CuF3 with a nano-network structure is prepared through a solvothermal reaction; then, n-Al is filled into the nanopore channels of the NH4CuF3 in a manner of ultrasonic-assisted dispersion, so as to form n-Al / NH4CuF3 MICs with good dispersity. The n-Al / NH4CuF3 MICs prepared by the method can etch a passivation layer and reduce the reaction energy barrier of the aluminum powder and an oxidizing agent, depending on the low-temperature decomposition of the NH4CuF3 to release F and the thermal decomposition of the NH4CuF3 to generate HF. In addition, a large amount of gaseous products are generated by the decomposition of the NH4CuF3, so that the generation of a reaction sintering phenomenon is relieved, and the combustion efficiency of the n-Al is improved.

The application discloses a flexible carbon nanometer net film material and a preparation method thereof, and belongs to the technical field of nanometer fiber electrode materials. The preparation of the flexible carbon nanometer net film material comprises the following steps: dissolving a polymer in a solvent A to obtain a solution B; ultrasonically dispersing the solution B in a solvent C to obtain a spraying net emulsion; wherein the solution B and the solvent C are immiscible; performing electrostatic spraying on the spraying net emulsion to obtain a polymer nanometer net film; performing pre-oxidation on the polymer nanometer net film; applying longitudinal and transverse tension to the polymer nanometer net film under a protective atmosphere; calcining the polymer nanometer net film; and cooling the polymer nanometer net film to obtain the flexible carbon nanometer net film material. The flexible carbon nanometer net film material has an efficient conductive network, exhibits excellent conductive performance and flexibility, and has a wide application in the fields of wearable devices, flexible sensors, energy storage devices and biomedical devices.

The embodiment of the invention discloses a balance weight module and a preparation method thereof and a weight training device, and belongs to the technical field of composites.The balance weight module comprises balance weight particles and a coating layer, the coating layer wraps the balance weight particles, the balance weight particles comprise metal particles, and the metal particles are arranged on the coating layer. The surface of each metal particle is sequentially coated with a flexible energy-absorbing sheet layer, a microcapsule buffer layer and an elastic nano net film layer from inside to outside; wherein the flexible energy-absorbing sheet layer is made of a liquid crystal polymer or a graphene oxide material, and the thickness of the flexible energy-absorbing sheet layer is 100-500 nm. According to the counterweight module provided by the invention, a multi-layer flexible and buffer material structure is introduced to the surfaces of the metal particles, so that a gradient interface which is outwards transited from a high-density core to a flexible material is realized, impact is effectively dispersed, a load is effectively absorbed, and an interface bonding force between a coating layer and the metal particles is enhanced; and the stability and durability of the whole structure are obviously improved.

The present invention provides a modified positive electrode material, a preparation method thereof, a positive electrode plate, and a lithium-ion battery. The preparation method of the modified positive electrode material comprises the following steps: S1: uniformly mixing an inorganic conductive carbon material, a stabilizer, and a first organic solvent to obtain a conductive slurry; S2: simultaneously applying the glue solution and the conductive slurry to the positive electrode active material powder located on a conductive plate through electrostatic weaving, allowing the mixture to stand, then microwave drying to form a two-dimensional nano-network structure, and finally mechanically grinding to obtain the modified positive electrode material. The present invention achieves directional arrangement of the conductive material on the active material through a combination of electrostatic weaving, microwave drying, and mechanical grinding, thereby achieving uniform dispersion and sufficient contact, and then gradually improving the stability between the two, ultimately producing a modified positive electrode material in which the conductive material is more evenly distributed on the surface of the active material, in closer contact, and more stable.

This invention relates to a vertically oriented composite cathode, its preparation method, and its application, relating to the field of solid-state batteries. The vertically oriented composite cathode includes a conductive agent, which comprises a graphene nanomesh. The graphene nanomesh has a microporous structure and exhibits a preferred orientation perpendicular to the current collector in the electrode thickness direction. The composite cathode provided by this invention contains a microporous structure and a vertically oriented graphene nanomesh. Through a dual strategy of "opening" and "aligning," a "high-speed tunnel" for ion transport is constructed, significantly shortening the lithium-ion transport path. The tortuosity is reduced from >3.5 in traditional structures to below 1.2, overcoming the shortcomings of existing technologies.

One embodiment of the present invention relates to a composite nanoweb material including a decellularized extracellular matrix and a therapeutic material including same and, more specifically, provides a multiscale nanofiber composite in which a decellularized extracellular matrix and a biocompatible polymer are mixed in various ratios and formed into micro- and nano-sized fibrous structures through an electrospinning process. In addition, another embodiment of the present invention relates to a method for manufacturing a composite nanoweb material and, more specifically, provides a multiscale nanofiber composite having micro- and nano-sized fibrous structures formed through an electrospinning process and a composite crosslinking process.

The invention belongs to the technical field of transparent flexible electrodes, and particularly relates to an all-inorganic transparent flexible electrode and a preparation method and application thereof. The all-inorganic transparent flexible electrode comprises a flexible substrate and a sandwich laminated structure which is formed by sequentially stacking and depositing a first transparent conductive oxide layer, a silver nanowire layer of a nanometer net structure and a second transparent conductive oxide layer on the flexible substrate. The flexible substrate is made of fluorine crystal mica; the first transparent conductive oxide layer and the second transparent conductive oxide layer are the same oxide layer; the first transparent conductive oxide layer is an ITO film or an AZO film, and the second transparent conductive oxide layer is an ITO film or an AZO film. According to the full-inorganic transparent flexible electrode prepared by the preparation method, the sheet resistance is reduced to 14.6 omega / sq while the light transmittance is maintained to be 90% or above, and the bottleneck that high conductivity, high transparency and high temperature resistance of a flexible electrode in the prior art cannot be achieved at the same time is broken through.

This invention provides a dual-network structure membrane composed of nanofibers and nanomesh, and its preparation method. The dual-network structure membrane includes a porous substrate and a dual-network structure loaded on the surface of the porous substrate. The dual-network structure is composed of nanofibers and a low-molecular-weight gel nanomesh. This invention first loads a nanofiber network onto the surface of the porous substrate, and then assembles a low-molecular-weight gel in situ into the nanofiber network. Utilizing the strong interaction between the nanofibers and the low-molecular-weight gel, the low-molecular-weight gel self-assembles on the nanofibers to form a loose yet stable nano-network structure. This enhances mechanical properties while avoiding increasing the packing density and air resistance of the nanofiber network. As a result, the dual-network structure membrane composed of nanofibers and nanomesh exhibits excellent air filtration performance and has promising application prospects in the fields of air filtration and protection.

The invention discloses a catalyst for preparing alcohol through light-driven shale gas oxidation and a preparation method and application of the catalyst, the catalyst comprises a carrier and nickel clusters loaded on the carrier, and the carrier is a zinc oxide nanometer net. According to the catalyst disclosed by the invention, Ni-O-Zn sites are introduced to an interface of a nickel cluster and a zinc oxide nano-net, so that strong metal-semiconductor interaction is formed, electron-rich nickel clusters and electron-deficient oxygen vacancies are induced to form, separation and migration of photon-generated carriers are promoted, methyl, ethyl and isopropyl intermediates in the reaction process are stabilized, and the reaction efficiency is improved. The photocatalytic activity is obviously enhanced; the catalyst provided by the invention has wide substrate applicability, and simultaneous photooxidation of methane, ethane and propane is realized for the first time; the catalyst provided by the invention can catalyze the photo-oxidation of methane, ethane, propane and shale gas under the mild conditions of normal temperature and low oxygen concentration, reduce the degree of peroxidation and improve the selectivity of a target product.

The invention relates to the technical field of batteries, and provides a base membrane for a composite current collector, a preparation method of the base membrane, the composite current collector, a pole piece and a battery. The base membrane for the composite current collector comprises a porous matrix and a coating layer. Wherein the coating layer is arranged on the surface of at least one side of the porous matrix, the coating layer contains nanocellulose crystals, and the aperture of the maximum hole in the surface of the base membrane is smaller than that of the maximum hole in the porous matrix. The surface of the porous base membrane is coated with the nano cellulose crystals, a layer of compact, uniform and firm nano network is constructed on the surface of the base membrane by utilizing the unique one-dimensional nano fiber structure and the membrane forming characteristic of the nano cellulose crystals, the surface aperture is remarkably reduced, and the penetration problem in the metal deposition process is effectively prevented.

This invention discloses a Zr-Ta-based low-activation refractory high-entropy alloy and its preparation method. After preparation, the microstructure of the Zr-Ta-based low-activation refractory high-entropy alloy transforms from a single-phase structure to a nano-network structure. This nano-network structure consists of a bulk nanophase and a matrix phase, and its unique microstructure synergistically endows the alloy with excellent comprehensive properties: a yield strength of up to 980 MPa, while maintaining a compressive elongation of over 60%, successfully achieving synergistic optimization of mechanical properties and radiation resistance. This preparation method effectively expands the application boundaries of Zr-Ta-based low-activation refractory high-entropy alloys in the field of nuclear structural materials, and the process has advantages such as simple operation, strong controllability, and readily available heat treatment equipment, possessing significant potential for engineering applications.

A method of fabricating semiconducting tellurium (Te) nanomesh. The method includes the steps of preparing a substrate, vaporizing Te powders under a first temperature; and growing Te nanomesh on the substrate using the vaporized Te powders under a second temperature. The first temperature is higher than the second temperature. The rationally designed nanomesh exhibits exciting properties, such as micrometer-level patterning capacity, excellent field-effect hole mobility, fast photoresponse in the optical communication region, and controllable electronic structure of the mixed-dimensional heterojunctions.

An ordered porous nano-network electrode includes a conductive three-dimensional structure having ordered and interconnected pores, and an active layer disposed on a surface of the conductive three-dimensional structure to surround the pores and including an organic active material having a redox center. An amount of the organic active material in a unit area is 0.1 mg / cm2 to 30 mg / cm2.

The invention relates to a vanadium-niobium bimetallic oxide electrochromic film and a preparation method and application thereof.The electrochromic film comprises conductive glass and a vanadium-niobium bimetallic oxide film on the conductive face of the conductive glass, and the vanadium-niobium bimetallic oxide film comprises two phases of Nb2V2O9 and V3O7, comprising any one of a nano-rod structure, a nano-particle stacking structure or a nano-net structure. The preparation method comprises the following specific preparation steps: dissolving a niobium source, a vanadium source and oxalic acid dihydrate in an ethanol-water mixed solvent, and stirring and dissolving to obtain a precursor solution; inserting FTO conductive glass into the precursor solution, and carrying out solvothermal reaction; and after the reaction is finished, cooling to room temperature, cleaning and drying to obtain the vanadium-niobium bimetallic oxide electrochromic film. Compared with single niobium oxide, visible light-near infrared dual-band regulation and control can be achieved, electrochromic response is achieved in the visible light band and the near infrared band, the light modulation amplitude is large, the color changing voltage range is small, and synthesis conditions are mild.

The invention belongs to the field of porous materials, and particularly relates to a nano mesh material and a preparation method thereof. The preparation method comprises the following steps: providing a porous membrane; the pore channels of the porous membrane are filled with a body material at the temperature ranging from 0.5 Tm to 0.8 Tm, the composite material is obtained, Tm is the melting point of the body material, and the body material comprises a metal material or a semiconductor material; and removing the porous membrane in the composite material to obtain the nano mesh material. According to the preparation method, the material selection flexibility is greatly improved, and meanwhile, the thickness, the aperture and the porosity of the nano mesh material are accurately controlled.

The invention provides a sunlight dynamic regulation transparent heat-insulation aerogel film as well as a preparation method and application thereof, and belongs to the technical field of aerogel materials. The invention provides a sunlight dynamic regulation transparent heat-insulation aerogel film which comprises the following components in percentage by mass: 0.5-1.5% of phase change nanoparticles and 98.5-99.5% of silica aerogel, the phase change nanoparticles are distributed in the silica aerogel, and the silica aerogel is prepared from organic silane containing methyl. According to the invention, a hydrophobic skeleton is constructed by organosilane containing methyl, phase change nanoparticles are added into silica aerogel to form a three-dimensional nano network, and the phase change nanoparticles realize dynamic photo-thermal regulation by regulating and controlling the transmissivity of a sunlight wave band at a specific temperature; the obtained sunlight dynamic regulation and control transparent heat insulation aerogel film has self-adaptive photo-thermal regulation, high light transmittance and super heat insulation performance, and is suitable for the high-end fields of intelligent building curtain walls, spacecraft thermal control and the like.

The invention discloses a thermal insulation coating and a preparation method thereof, and relates to the technical field of coatings. The heat insulation and heat preservation coating is prepared from cross-linked coated modified SiO2 aerogel hybrid microspheres, modified basic slurry, flaky zinc-aluminum powder and polymethylphenyl organic silicon resin, the cross-linked, coated and modified SiO2 aerogel hybrid microspheres are uniformly embedded into a modified basic slurry network, countless tiny heat insulation units are formed in a three-dimensional nano thermal barrier network, heat conduction is effectively inhibited and blocked, the heat insulation and heat preservation performance is improved, meanwhile, the coating is endowed with extremely high hydrophobicity and permeability resistance, the waterproof performance is remarkably enhanced, and in addition, the coating has a good application prospect. The three-dimensional nano network fixedly wraps the cross-linked and coated modified SiO2 aerogel hybrid microspheres, so that not only is the overall mechanical durability improved and the risk of falling off and abrasion reduced, but also the immersion and permeation of a corrosive medium can be further reduced by a compact barrier effect, and the durability of the coating is improved.

The invention provides a terahertz sensor for detecting trace brain glioma, which relates to the technical field of terahertz and is formed by splicing a plurality of sensing units, the sensing unit comprises a high-resistance silicon substrate layer, a metamaterial layer, a silicon dioxide dielectric layer, a microelectrode array layer and a hydrogel packaging layer; the high-resistance silicon substrate layer, the metamaterial layer, the silicon dioxide dielectric layer, the microelectrode array layer and the hydrogel packaging layer are sequentially arranged from bottom to top; the microelectrode array layer is any one of an ITO (Indium Tin Oxide) nano net or a gold nano net; the metamaterial layer comprises a cross-shaped layer and a star-shaped layer; the cross-shaped layer is arranged on the upper surface of the high-resistance silicon substrate layer, and the star-shaped layer is arranged on the lower surface of the silicon dioxide dielectric layer. According to the invention, the interference of a water-containing environment is solved, samples are gathered through the microelectrode array layer, and high-precision detection can be carried out on low-concentration samples.

The application discloses a kind of mechanically interlocked catenoid structure hydrogel and preparation method thereof, belong to hydrogel sensing technical field.The preparation steps of the mechanically interlocked catenoid structure hydrogel are as follows: first, prepare carbon nano network solution using hydroquinone;Then the carbon nano network solution, acrylamide, water, crosslinking agent and photo initiator are mixed, and are treated under ultraviolet light irradiation, to obtain the hydrogel.A kind of mechanically interlocked catenoid structure hydrogel is constructed by introducing three-dimensional carbon nano network, blending with acrylamide monomer and in-situ radical polymerization.Carbon nano network provides continuous porous skeleton, polyacrylamide segment is embedded in carbon nano network pore during polymerization, and forms stable catenoid structure by physical winding, space nesting and mechanical interlocking.The prepared hydrogel has excellent mechanical properties, adhesion and strain response capacity, and provides reliable and economical material basis for flexible strain sensing function.

The present invention belongs to the field of photoelectrocatalysis, specifically relating to a Cu / Cu3P@TiO2 nanomesh photoelectrode, its preparation, and its application in photoelectrocatalytic ammonia production and photoelectrocatalytic oxidation. The Cu / Cu3P@TiO2 nanomesh photoelectrode comprises a titanium substrate, a TiO2 nanomesh grown in situ on the surface of the titanium substrate, and copper-based dual-phase nanoparticles uniformly dispersed on the TiO2 nanomesh. The TiO2 nanomesh is a three-dimensional mesh material interwoven from TiO2 nanowires. The copper-based dual-phase nanoparticles comprise nano-Cu particles and nano-Cu3P particles, with a heterogeneous interface between the copper-based dual-phase nanoparticles and the TiO2 nanomesh. The electrode of the present invention exhibits excellent photoelectrocatalytic oxidation and photoelectrocatalytic reduction multifunctionality, and exhibits superior photoelectrocatalytic performance.

The invention discloses a brain-like hydrogen sensor and a preparation method thereof, and relates to the technical field of gas sensing and neuromorphic devices. The brain hydrogen sensor comprises a self-organizing nanometer network, an electrode substrate and a conductivity measurement external circuit, the self-organizing nano-network is formed by depositing hydrogen-sensitive nano-particles on the surface of the electrode substrate, and the self-organizing nano-network is in a conductance critical state; the conductance measurement external circuit is connected with the electrode of the electrode substrate and is used for monitoring a conductance switch event of the self-organizing nano network in real time and detecting hydrogen according to the relationship between the frequency of the conductance switch event and the hydrogen concentration. The brain-like hydrogen sensor realizes real-time, low-power-consumption and high-reliability detection of hydrogen by using an avalanche type dynamic conductivity switch event generated by the self-organizing nano network in a critical state, is easy to integrate with a future artificial intelligence algorithm, and meets the development demand of future intelligent sensing application.

The invention discloses a high-wear-resistance material as well as a preparation method and application thereof, and belongs to the field of material processing and surface strengthening. The high-wear-resistance material comprises a base body and a nano network carbide-based surface modification layer covering the surface of the base body, the nano network carbide-based surface modification layer comprises nano-scale spherical Fe3C type carbide and nano-scale lath martensite which are distributed at the grain boundary of the base body and near dislocation defects, and the size range of the spherical Fe3C type carbide is 20-130 nm; the base body is made of carburizing steel in a quenching-tempering state. The wear-resistant material is prepared by strengthening and modifying the surface of a matrix through an ultrasonic shot peening process. By regulating and controlling carbide distribution and a surface microscopic structure, the tribological performance of the material is remarkably improved, the service life of the material is prolonged, the limitation of strengthening depth and wear resistance of a traditional technology is broken through, and the method has a wide application prospect.

The invention relates to the technical field of materials, in particular to a composite electrode felt with controllable interlayer spacing and a preparation method and application thereof. Comprising the following steps: (1) according to the stoichiometric ratio of a composite electrode material to be prepared, dissolving nitrate in an electrostatic spinning mixed solution, then sequentially adding an excipient and a polyanionic additive, and uniformly mixing to obtain an electrostatic spinning precursor solution; (2) performing electrostatic spinning on the electrostatic spinning precursor solution to obtain a spinning precursor; (3) calcining the spinning precursor to obtain a composite phase oxygen electrode; and (4) uniformly spraying a polyvinyl butyral solution on the surface of the composite phase oxygen electrode, and carrying out plasticizing and drying treatment to obtain the composite electrode felt. According to the invention, the surface tension and charge density distribution of the spinning solution are controlled to control the interlayer distance of the thin film, so that the three-dimensional nano-mesh interlayer distance of the composite electrode is realized, and the mass transfer and mechanical stability of the electrode are balanced.

The present invention discloses a high-porosity phenolic resin-based three-dimensional nano-network carbon aerogel and a preparation method thereof, belonging to the technical fields of nanomaterials and energy science and technology. By regulating the pre-carbonization temperature, time and the amount of reaction gas used, the controllable construction of pores is realized, and a series of high-porosity carbon aerogels with customizable specific surface areas are obtained. The pre-carbonization treatment enables the organic aerogel polymer to be partially converted into amorphous carbon, and the introduction of nitrogen and oxygen reaction gases causes the amorphous carbon to react with oxygen and then carbon dioxide escapes, that is, the reaction gas has a certain etching effect on the aerogel to form rich micropores and small-sized mesopores. The present invention effectively solves the problems of low porosity and difficult regulation of specific surface area of the existing phenolic resin-based carbon aerogel, and the collapse of the three-dimensional nano-network structure caused by strong chemical activation for pore formation, etc. It is simple, efficient, low-cost and convenient for popularization and utilization.

The present invention discloses a polymer nanomembrane and its application in oil water removal, belonging to the field of nanomembrane technology. The polymer nanomembrane material of the present invention utilizes solvent polarity differences to control the emulsion particle size through ultrasonic waves. Electrospraying the polymer emulsion forms a fiber network with a uniform pore structure. This material exhibits the advantages of a continuous two-dimensional nanomesh, high coverage, and uniform mesh pores. The resulting nanomembrane has a high efficiency (>98%) in separating emulsified water from oil products. Furthermore, this technology does not rely on the complex external conditions imposed by electrospraying, resulting in a simple and controllable preparation process.

Provided is a method for manufacturing a nano-mesh membrane having a plurality of pores formed spaced apart from each other. The method for manufacturing a nano-mesh membrane may comprise: a step for preparing a base membrane; a step for forming a functional film on the base membrane; and a step for irradiating the base membrane, on which the functional film is formed, with ion beams so that the ion beams pass through the functional film and the base membrane, and thereby manufacturing the nano-mesh membrane having a plurality of the pores that are formed during the course of the ion beams passing through the functional film and the base membrane.