42 results about "Porous composite" patented technology

An electrode material is provided that provides an electrode for a fuel cell with excellent electrode performance and durability. The electrode material is any one of the following electrode materials (A) or (B): Electrode material (A): comprising a porous composite support and electrode catalyst particles supported on the porous composite support, the porous composite support comprising: a carbon support composed of mesoporous carbon; and an electronically conductive oxide fixed to at least the inner surface and outer surface of the micropores of the mesoporous carbon, wherein a portion or all of the electrode catalyst particles are supported within the micropores of the mesoporous carbon via the electronically conductive oxide. Electrode material (B): comprising a carbon support composed of mesoporous carbon; and an electrode catalyst composite fixed to at least the inner surface and outer surface of the micropores of the mesoporous carbon, wherein the electrode catalyst composite comprises electrode catalyst particles and an electronically conductive oxide, the electronically conductive oxide being present in a manner that fills the spaces between the electrode catalyst particles.

The application relates to the technical field of building, and discloses indoor sound insulation and antibacterial coating, which is applied to the surface of a building wall base layer and comprises, from inside to outside, a high-permeability alkali-resistant sealing primer layer, a porous composite sound-absorbing middle layer for gap friction attenuation of sound waves, an antibacterial agent slow-release depot layer for providing long-acting antibacterial active substances, and a photocatalytic sterilization and purification layer. The composite coating system of the application resolves the technical problems of easy agglomeration of sound-absorbing fillers and nanometer antibacterial agents in direct blending in traditional processes and mutual hindering of the effects by scientifically constructing a multi-dimensional functional layered system. The system not only realizes excellent broadband sound insulation and noise reduction effects by virtue of the composite acoustic structure of quality reflection, porous dissipation and damping heat conversion, but also combines the double-effect biochemical mechanisms of deep ion slow release and surface photocatalysis to ensure long-acting broad-spectrum sterilization and decomposition of volatile organic compounds.

The embodiment of the application provides a kind of composite positive material and its preparation method, lithium-sulfur battery positive sheet and lithium-sulfur battery.The composite positive material includes porous carbon matrix, metal atom and carbon nanotube, carbon nanotube is in situ grown on the metal atom attached to the pore and surface of porous carbon matrix, and N element is introduced in the growth process of carbon nanotube.The application is in situ grown by carbon nanotube on porous carbon skeleton and then adjusts the pore structure of porous composite material, effectively inhibits the shuttle effect of polysulfide.At the same time, nitrogen doping helps to increase the chemical adsorption capacity of polysulfide, and also effectively inhibits the shuttle effect of polysulfide, thereby improving the utilization rate of sulfur and the cycle life of battery.The preparation method of nanotube composite material for inhibiting the shuttle effect of lithium polysulfide in the prior art is complex and has high cost.

The utility model discloses a kind of ventilated porous composite sponge pad, it is related to sponge pad technical field, including pad body and the heat dissipation cavity being set on it, pad body top and bottom two ends are respectively adhered and fixed with solid surface layer, pad body top is communicated with pad body periphery by heat dissipation cavity;It also includes the bamboo charcoal fiber filling layer in heat dissipation cavity;Solid surface layer is breathable, and solid surface layer is ice silk fiber layer;The utility model has the advantages that: after bamboo charcoal fiber filling layer is inserted into heat dissipation cavity, certain support can be provided to increase the stability of heat dissipation cavity when being pressed, to strengthen the ventilation and heat dissipation property;Bamboo charcoal fiber filling layer can also provide moisture absorption and perspiration function and itself has certain thermal conductivity, can promote the diffusion and emission of heat;Solid surface layer is as surface layer and uses ice silk fiber layer or flax fiber layer, can provide thermal conductivity to transfer heat to bamboo charcoal fiber filling layer, and itself has good moisture absorption and perspiration performance, can improve the cool feeling.

This invention belongs to the field of reconstituted tobacco technology, and provides a reconstituted tobacco based on a functional compound of Phyllanthus emblica and its preparation method. The reconstituted tobacco includes a porous composite substrate and a coating liquid. The Phyllanthus emblica functional compound includes Phyllanthus emblica pomace pulp and Phyllanthus emblica extract. The porous composite substrate is prepared by mixing and molding Phyllanthus emblica pomace pulp and tobacco pulp, wherein the Phyllanthus emblica pomace in the pulp has a porous and loose structure. The coating liquid is prepared by mixing Phyllanthus emblica extract and tobacco concentrate. The reconstituted tobacco prepared by the method of this invention can enhance the fruity sweetness and aroma of the reconstituted tobacco, improve its aroma quality, reduce its irritation, reduce its woody smell, and effectively improve the comfort of the reconstituted tobacco.

A porous composite body having: a base material having a first main face and a nickel layer provided to at least a part of the first main face, the base material being composed of a nickel mesh structure or a nickel porous body having a three-dimensional network structure, and the arithmetic mean height Sa of the nickel layer as defined by ISO 25178 being 5 μm or less.

The application discloses a kind of magnetic porous composite material and its preparation method and the application of adsorbing and purifying micro-nano plastic in water body.The magnetic porous composite material has three-dimensional network skeleton formed by microcrystalline region and hydrogen bond physical crosslinking between polyvinyl alcohol molecular chains, cationic polymer is physically inserted and distributed in the skeleton to provide cation adsorption sites, and magnetic nanoparticles are dispersed in the network;After freeze-drying, a hierarchical porous network structure containing 50-300 μm interconnected macropores and 3-10 nm mesopores is formed, wherein the interconnected macropores serve as mass transfer channels, and the mesopores and cation adsorption sites cooperate to achieve physical entrapment and electrostatic adsorption of micro-nano plastic.The present application does not require any chemical crosslinking agent, can be quickly separated by an external magnetic field, has the advantages of high adsorption efficiency, strong environmental adaptability, easy magnetic separation and multiple cycle regeneration, and is suitable for the enrichment, detection pretreatment and purification of micro-nano plastic in water body.

The application discloses a kind of porous composite materials for sulfur dioxide capture and preparation method thereof, belong to porous adsorption material technical field, first introduce aluminium salt in polyacrylonitrile solution, by electrospinning and pre-oxidation-carbonization process structure with multistage pore structure's aluminium-doped carbon fiber framework, while significantly improving specific surface area, give material excellent mechanical strength and structural stability, subsequently in-situ load iron, calcium hydrate particles on the fiber surface, form multi-metal synergistic active site, realize the strengthening adsorption and fixed of sulfur dioxide, further utilize silane modified fly ash and red mud, diatomite, water glass and alkaline component complex, and through aluminum powder foaming and calcination constructs through channel, so that material still maintains excellent mechanical property under the condition of high sulfur dioxide capture capacity, can meet the stability requirement of high flow rate impact and long-term cyclic operation in industrial desulfurization tower.

The application discloses a Ce-doped Co-MOF derived CuO composite oxide catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: S1, obtaining rare earth waste residue containing Ce elements and Co elements, and processing the rare earth waste residue to obtain a cerium salt solution and a cobalt salt solution; S2, mixing the cerium salt solution and the cobalt salt solution with an organic ligand to prepare a Ce-Co-MOF precursor; S3, performing calcination and annealing treatment to obtain a Ce-Co-O porous composite oxide carrier; S4, preparing a copper salt solution, impregnating the Ce-Co-O porous composite oxide carrier with the copper salt solution, and then performing drying and calcination treatment to obtain a CuO@Ce-Co-O composite oxide; and S5, performing surface plasmon activation treatment to obtain the Ce-doped Co-MOF derived CuO composite oxide catalyst. The application can realize high-value utilization of rare earth resources and precise structure regulation of catalytic materials, and the prepared catalyst can exhibit excellent activity and stability in a low-temperature CO oxidation reaction.

This application belongs to the technical field of flame-retardant intumescent thermal insulation materials, specifically providing an inorganic intumescent thermal insulation fireproof coating and its preparation method. The inorganic intumescent thermal insulation fireproof coating comprises the following components: potassium silicate solution, aluminum dihydrogen phosphate, porous composite filler, melamine, pentaerythritol, aluminum hydroxide, glass powder, expandable graphite, mullite fiber, BYK-025 defoamer, sodium tripolyphosphate dispersant, and hydroxypropyl methylcellulose thickener. The inorganic intumescent thermal insulation fireproof coating obtained by this application exhibits excellent bonding strength, high-temperature structural stability, and controllable expansion, making it suitable for fire protection in scenarios such as new energy battery boxes and steel structure buildings, and capable of meeting stringent fire protection requirements.

The present application relates to a kind of NiFeMo-based spherical porous composite catalytic material and its preparation method and application, belong to electrocatalytic material technical field.The present application is aimed at solving the problems of complex preparation process of existing material, powder is easy to agglomerate, insufficient controllability of morphology and limited continuous preparation capacity.A kind of NiFeMo-based spherical porous composite catalytic material is provided, it is the composite powder containing Ni, Fe, Mo element, presents monodisperse spherical particle, with multi-level porous structure, Ni, Fe, Mo molar ratio is 10:10:(0.5~2);It is prepared by ultrasonic spray pyrolysis one-step method.The electrochemical active surface area of the material of the present application reaches 0.6303 cm 2 , higher than NiFeV (0.3360 cm 2 ) And NiMo (0.1485 cm 2 ) ; Hydrogen evolution driving potential is smaller, charge transfer resistance is lower, and it is suitable for alkaline electrolytic water cathode hydrogen evolution catalyst.

The present application relates to a kind of high flexibility flame-retardant composite, bundled cable and its preparation method, belong to cable material technical field, by hydrothermal method synthesis CoFe2O4 Nanoparticle, then it is compounded with graphene oxide, copper nanowire, forms three-dimensional porous composite aerogel, after ultrasonic stripping, graphene oxide sheet layer forms stable conductive framework, the melting point of copper nanowire is higher, can keep continuous conductive network structure in high temperature heat treatment, avoid melting agglomeration, interface combination is more stable, CoFe2O4 Nanoparticle is embedded in sheet layer gap, realizes interface close combination after high temperature heat treatment, graphene oxide strengthens network continuity, copper nanowire is generated by reflection electromagnetic wave conductive loss, and the magnetic hysteresis loss of CoFe2O4 Nanoparticle forms complement, in wide frequency range, shielding effectiveness fluctuation is smaller, can effectively resist the interline electromagnetic coupling of strong electricity, weak electricity when bundled laying, guarantee signal transmission stability.

The application relates to the technical field of aircraft thermal protection, and particularly discloses a preparation method of a bearing / heat-proof integrated ordered porous sweating composite structure, which comprises the following steps: preparing a three-dimensional fiber preform, phthalonitrile resin pouring, cutting processing and aluminum wire removal; and the bearing / heat-proof integrated ordered porous sweating composite structure comprises an ordered porous sweating structure, a cooling working medium flow cavity and a cooling working medium storage tank, the ordered porous sweating structure is a bearing part of a component main body, and the ordered porous sweating structure is provided with a micropore flow channel for sweating cooling; the ordered porous composite material sweating structure of the application can have higher bearing capacity while the sweating cooling performance is considered, and the specific strength is far higher than that of the commonly-used metal and ceramic sweating materials; the bearing and sweating structure functions are simultaneously realized; the hierarchical structure of the sweating structure can be reduced, the overall thickness of the sweating system is reduced, and the negative weight of the aircraft is greatly reduced.

The application discloses a kind of porous composite material modified electrode and its preparation method and application, belong to chemical analysis detection technical field.The porous composite material modified electrode includes conductive substrate and modification layer fixed on the surface of conductive substrate, and modification layer is the biochar-polyurethane composite material with porous structure, the surface of modification layer contains C-O, N-H and-OH functional group, and the BET multipoint specific surface area of modification layer is 8.77m² / g-36.22m² / g, and BJH median pore size is 2.06nm-5.95nm.The application is by the biochar-polyurethane composite material with high specific surface area (8.77m² / g-36.22m² / g) and abundant surface functional group is modified on the surface of conductive substrate, increases one step open circuit enrichment operation before electrochemical scanning, makes the Cr 6+ High-efficiency pre-concentration is realized in the modification layer, and the problems of Cr 6+ The electrochemical detection has the problem of insufficient response under low concentration condition.

This invention discloses a high-temperature resistant microwave absorbing honeycomb ceramic, its preparation method, and its applications, relating to the field of porous ceramic materials technology. The process includes obtaining a honeycomb skeleton; introducing a porous structural material onto the honeycomb skeleton to obtain a honeycomb structure preform; introducing a ceramic phase onto the honeycomb structure preform to obtain a porous composite; and removing the honeycomb skeleton from the porous composite to obtain the high-temperature resistant microwave absorbing honeycomb ceramic. The ceramic prepared by this invention has a porous wall structure and a hollow skeleton, mainly solving the shortcomings of existing high-temperature resistant microwave absorbing honeycomb ceramics, such as complex preparation processes, poor microwave absorption performance, and difficulty in control.

The invention relates to a porous composite catalyst consisting of an Fe-N-C catalytic structure and a tin metal phase, wherein the Sn / Fe atomic ratio of tin to iron is greater than 2 and less than 50, said porous composite catalyst containing micropores and mesopores, wherein the micropore volume is greater than 0.02 cm3 g-1, the mesopore volume is greater than 0.20 cm3 g-1, the micropore volume is the total volume of the micropores, and the mesopore volume is the total volume of the mesopores with a width of between 2 and 30 nm. The invention also relates to the method for synthesizing the catalyst, an ink comprising the catalyst and an ionomer, an electrode containing the catalyst, and a membrane electrode assembly, in particular for a fuel cell.

This invention belongs to the field of catalyst technology, specifically relating to porous composite metal oxide materials derived from bimetallic MIL-53 and their preparation methods, as well as propane dehydrogenation catalysts prepared using these materials and their applications. The method includes the following steps: hydrothermal reaction of aluminum salt, gallium salt, and 1,4-terephthalic acid; solvothermal treatment and washing of the hydrothermal reaction products to obtain a bimetallic MIL-53 precursor; calcination of the bimetallic MIL-53 precursor sequentially under an inert atmosphere and an oxidizing atmosphere to obtain a porous composite metal oxide material; reduction by H2 under a nitrogen atmosphere; and subsequent calcination in air to obtain the composite metal oxide catalyst. This invention controls the Al... 3+ with Ga 3+ The precise molar ratio of the feed and the experimental procedure of reduction followed by calcination can prevent the formation of gallium oxide clusters, ensuring that gallium oxide is uniformly dispersed in the material, while simultaneously promoting the activity of Ga2+ species. Ⅳ The generation of .

This invention discloses a bifunctional three-dimensional porous composite material and its preparation method and application. The method includes the following steps: (1) adding a carbon source to deionized water and stirring to obtain a uniformly dispersed solution; (2) dissolving a rare earth metal source, a transition metal source, and a sulfur source in deionized water and stirring to obtain a precursor solution; (3) mixing the solution obtained in step (1) and the precursor solution to obtain a mixed solution and performing a hydrothermal reaction; (4) repeatedly washing the product obtained in step (3), drying it, and then performing heat treatment to prepare the bifunctional three-dimensional porous composite material. The bifunctional three-dimensional porous composite material can effectively buffer the volume expansion effect of the sulfur cathode during charging and discharging and promote the full wetting of the electrolyte. On the other hand, it also improves the conductivity and catalytic activity of the composite material through the doping of rare earth elements, effectively improving the electrochemical performance of lithium-sulfur batteries.

The application discloses a palladium-loaded vanadium oxide doped nitrogen-carbon material and a preparation method and application thereof, and the preparation method is as follows: S1, zinc salt and vanadium salt are dissolved in a composite solvent according to a mass ratio of 95:3-7, then 1H-1,2,3-triazole is added to form a suspension A, the obtained suspension A is continuously stirred and reacted, then is centrifuged, washed and dried to obtain a Zn / V-MET-6 product; S2, the Zn / V-MET-6 is calcined in a tube furnace at 850 DEG C-1000 DEG C for 1h-4h, and then is cooled to room temperature to obtain vanadium oxide doped nitrogen-carbon; S3, the vanadium oxide doped nitrogen-carbon is uniformly stirred and mixed with water and sodium tetrachloropalladate, then a sodium borohydride reducing agent is added, after a reduction reaction, a suspension B is obtained; the obtained suspension B is centrifuged, washed and dried to obtain the palladium-loaded vanadium oxide doped nitrogen-carbon material; the catalyst loads Pd nanoparticles in a carrier, and after reduction, a porous composite material is obtained, the catalyst has good stability and excellent performance in catalyzing decomposition of formic acid.

The present invention relates to a method of producing a porous composite comprising single-atom metal catalysts and nitrogen atoms by using a hierarchical carbon material from a carbon dioxide-containing gas. According to the present invention, a composite material is produced by producing a porous carbon material using nanosized templates and carbon dioxide, producing carbon nanotubes from the composite material through a self-templating process, and adding single-atom catalysts to the carbon nanofibers. In addition, it is possible to produce a composite having significantly improved porous characteristics and electrochemical properties by nitrogen atom doping using a nitrogen precursor. The produced composite may be easily applied to a high-energy storage device such as a lithium-sulfur battery.

This application discloses a porous composite material based on an internal interface contact mechanism, comprising a polymeric elastomer matrix with multiple micropores, and conductive fillers and nanofillers dispersed within the polymeric elastomer matrix; wherein the volume fraction of the conductive fillers is located within the percolation threshold neighborhood of the porous composite material; the porous composite material is further configured such that, under pressure, the micropores undergo reversible deformation and induce reversible contact between the conductive fillers, thereby achieving a change in the conductivity of the porous composite material. Furthermore, this application discloses a method for preparing the above-mentioned porous composite material and a flexible pressure sensor fabricated using the above-mentioned porous composite material. This application utilizes the internal interface contact conductivity mechanism induced by micropores to achieve high-sensitivity pressure response and high reliability in materials or devices, and is easy to process.

Method for manufacturing a multi-perforated composite acoustic skin without mechanical drilling. The invention relates to a method for manufacturing a multi-perforated acoustic skin made of composite material (8) for an acoustic attenuation structure, the method comprising the following steps: - formation of a fibrous preform comprising a precursor material of a matrix, - carrying out a heat treatment to transform the precursor into a matrix so as to obtain a multi-perforated acoustic skin made of composite material comprising a fibrous reinforcement densified by said matrix, the step of forming the fibrous preform comprising draping the fibers (1) on a surface of a mandrel (2) having protrusions (3),and the mandrel (2) and the protrusions (3) can each be made of a fusible material at a temperature lower than the heat treatment temperature for transforming the precursor into a matrix so as to eliminate said mandrel (2) and said protrusions (3) during the heat treatment step for transformation. Figure for the abstract: Fig. 4,

This invention discloses an iron-carbon micro-electrolysis filler for the degradation of nitroguanidine wastewater and its preparation method. It is prepared using red mud as the iron source, waste oil as the carbon source, and potassium hydroxide as the pore-forming agent. This invention utilizes strong acid to etch the red mud, extracting iron from it. Adjusting the pH of the leachate yields high-purity Fe(OH)3, which is then decomposed into Fe2O3 at high temperature and subsequently carbothermally reduced to zero-valent iron. This avoids the silicon and aluminum in the red mud coating the zero-valent iron, thus preventing it from affecting the micro-electrolysis effect. The zero-valent iron has good contact with the carbon material, effectively forming a galvanic cell. Using liquid waste oil and organic flocculants as the carbon material and reducing agent sources increases the contact between the carbon material and iron oxide, improving the reduction efficiency. KOH etching of the carbon material forms channels, preparing a porous composite material that enhances the adsorption and enrichment of pollutants. Compared with existing red mud-based iron-carbon micro-electrolysis materials, this method is simpler, lower in cost, and easier to scale up.

The application discloses a high-heat-resistance high-ionic-conductivity lithium battery diaphragm and a preparation method thereof. The high-heat-resistance high-ionic-conductivity lithium battery diaphragm comprises a base film and a coating layer on the base film, and the coating layer comprises porous alumina powder, a dispersing agent, an acrylic ester copolymer and a polyacrylamide copolymer. The particle size of the porous alumina powder is D10: 0.1-0.3 microns, D50: 0.3-0.5 microns and D90: 0.6-0.8 microns. The pore size of the porous alumina powder is 8-14 nm, and the specific surface area is 10-40 m 2 / g. In the application, the polyacrylamide is grafted on the porous alumina, and the diaphragm formed after coating on the surface of the base film is a porous composite diaphragm. The porous alumina improves the mechanical strength of the diaphragm, and the functional groups of the polyacrylamide serve as lithium-philic sites to form a fast channel for lithium ion transmission. The hairy polyacrylamide chain and the porous alumina cooperatively provide a channel for electrolyte diffusion, and can realize uniform distribution and rapid passing of lithium ions, thereby improving the long cycle efficiency of the lithium ion battery.

This invention belongs to the field of lithium-ion battery anode material preparation, and discloses a semi-solid lithium-ion battery anode structure and its preparation method. The method includes the following steps: A) electrochemically depositing a 3D porous copper structure on copper foil using a hydrogen bubble template method; B) depositing active materials such as silicon and germanium on this structure; C) electrophoretically depositing carbon materials onto the surface of the 3D porous composite structure and then coating it with carbon materials. This invention effectively mitigates the volume expansion of the active materials using a 3D porous structure, avoids side reactions between the active materials and the electrolyte using carbon coating, and reverses the flow of electron and ion transport in the active layer through a self-supporting structure, comprehensively improving the anode's capacity, cycle life, and rate performance. Simultaneously, the integrated construction method avoids the emergence of numerous micro-interfaces in traditional processes and the series of problems caused by coating methods. The 3D porous self-supporting structure constructed by this invention can fill the pores of the porous structure with electrolyte, obtaining a novel semi-solid lithium-ion battery anode structure. Furthermore, the process is simple, low-cost, and suitable for industrial production.

The application discloses a kind of containing lithium supplement agent's porous composite material, which is composed of porous structure carbon material, lithium supplement agent, enhanced conductive material, can contain or not contain other element coating layer etc..Among them, the porous structure carbon material is used as carbon skeleton and support structure for adsorbing lithium supplement agent and storing electrolyte;Lithium supplement agent is used to improve battery cycle performance;Enhanced conductive material is used to further improve the electronic conductivity of the material and improve the kinetics, reduce the powder resistance of the material, solve the defect that the electronic conductivity of the porous carbon material itself is not high;Coating layer with or without surface coating is better for the enhanced conductive material to coat on the surface of the porous material to reduce the resistance of the material.

This invention discloses a hollow hydrogel tube enzyme immobilization carrier material and its preparation method, belonging to the field of enzyme immobilization and protein modification technology. The method includes the following steps: (1) preparation of the hollow hydrogel tube; (2) freeze-thaw cycle treatment; and (3) enzyme immobilization treatment. In this invention, a hollow structure is constructed by coaxial injection, and combined with a composite system of sodium alginate, polyvinyl alcohol, and carboxymethyl chitosan, a multi-linked network is formed under the action of CaCl2 and boric acid. Simultaneously, freeze-thaw cycle treatment further enhances its structural stability. The resulting hydrogel tube has a hollow-porous composite structure, which can effectively improve the enzyme immobilization efficiency and catalytic stability. Furthermore, the immobilized enzyme carrier can be recycled 11 times, with a remaining enzyme activity of 29.8%. This invention achieves limited enzymatic hydrolysis of soybean protein isolate, providing an efficient and feasible method for improving its functional properties and expanding its application in the food industry.

This invention provides a method for preparing high-purity triethylamine, belonging to the field of chemical synthesis technology. In the presence of a catalyst and hydrogen, ammonia and ethanol undergo a catalytic reaction to obtain an ethylamine mixture; the ethylamine mixture is then distilled to obtain distilled triethylamine; the distilled triethylamine is then adsorbed using an adsorbent to obtain high-purity triethylamine, wherein the total impurity content of the high-purity triethylamine is ≤0.3%, and the total metal impurity content is ≤1.5ppm; the catalyst is a porous composite transition metal oxide; the adsorbent is an acylhydrazone-based organic framework material, which is obtained by polymerization of raw materials including aldehyde monomers and acylhydrazine monomers. This invention utilizes an acylhydrazone-based organic framework material to effectively adsorb impurity ions in triethylamine, ultimately obtaining high-purity triethylamine.