557results about "Aerogel preparation" patented technology

The invention relates to a flame-retardant and heat-insulating aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of novel building materials. The fiber aerogel is prepared through coaxial electrostatic spinning, an injector containing a polymer spinning solution is connected to a skin layer needle tube connecting port, an injector containing air is connected to a core layer needle tube connecting port, coaxial electrostatic spinning is carried out to prepare micron fibers with skin-core structures, the micron fibers fall on a receiving base material, and the micron fibers with the skin-core structures fall on the receiving base material. A hollow fiber aerogel material with a three-dimensional fluffy structure is obtained, in-situ growth of hydrated nano silicate particles is carried out after thermal crosslinking treatment, the nano silicate particles grow along the fiber surface and cover the micron fiber surface of the hollow fiber aerogel material, and the aerogel composite material is obtained. The hydrated nano silicate particle growth solution comprises polyvinyl alcohol, calcium salt, silicate and aluminum salt. The prepared aerogel composite material has excellent flame retardance and heat insulation performance and is suitable for being used as a building material.

The invention belongs to the field of coal gangue resource utilization, and particularly discloses a method for preparing fiber-reinforced coal gangue-based composite functional aerogel. After being activated, the coal gangue is put into an acid leaching solution to be leached, and an aluminum-rich solution is obtained; adding ammonia water into the aluminum-rich solution to adjust the pH to obtain hydroxide precipitate; adding a sodium hydroxide solution into the precipitate to react to obtain a sodium aluminate solution; neutralizing the sodium aluminate solution with hydrochloric acid to obtain an aluminum chloride solution, stirring to obtain aluminum sol, and adding ceramic fibers into the aluminum sol; violently stirring the sol, and adding epoxypropane to obtain wet gel; after aging the wet gel, carrying out surface modification to obtain hydrophobic coal gangue-based aluminum oxide and composite wet gel of the hydrophobic coal gangue-based aluminum oxide; and drying the modified wet gel at normal pressure to obtain the hydrophobic coal gangue-based aluminum oxide and the composite aerogel thereof. Ceramic fibers are introduced as a reinforcing phase, so that the compressive strength and toughness of the material are improved; the composite aerogel is subjected to surface modification, uniform modification is ensured, the contact angle is remarkably increased, the hygroscopicity is reduced, and the stability of the material is enhanced.

The invention provides a super-hydrophobic passion fruit peel carbon aerogel VOCs adsorbent based on low-temperature plasma synergistic nitrogen doping modification and a preparation method thereof, and relates to the technical field of VOCs adsorbents. The super-hydrophobic passion fruit peel carbon aerogel VOCs adsorbent based on low-temperature plasma synergistic nitrogen doping modification is prepared by crushing passion fruit peel, mixing the crushed passion fruit peel with a nitrogen-containing compound to form gel, performing low-temperature plasma modification, performing freeze drying, performing high-temperature carbonization, and performing water washing and drying. The adsorbent is spherical, and the water contact angle is 115.8 degrees to 152.4 degrees. The adsorbent disclosed by the invention has the advantages of super hydrophobicity, high specific surface area, developed microporous structure, excellent VOCs adsorption performance, broad-spectrum adsorption capacity, good reusability and mechanical strength, the preparation method is simple in process, green and environment-friendly, low in cost and good in universality, a new technical scheme is provided for VOCs treatment in a high-humidity environment, and the adsorbent has a good application prospect.

The invention discloses a preparation method of a salt-resistant double-layer photo-thermal aerogel evaporator. The preparation method comprises the following steps: S1, cutting and cleaning foamed nickel, and then carrying out vacuum drying; s2, preparing Cu2O / NF (nickel nitrate); s3, preparing ppy-Cu2O / NF (nickel fluoride); s4, preparing hydrogel; and S5, flatly placing a sample ppy-Cu2O / NF on the top surface of the hydrogel, continuing to stand for gelling, enabling the photo-thermal layer and the bottom layer hydrogel to be fully combined, pre-freezing, transferring into a freeze dryer, and freeze-drying to finally obtain the salt-tolerant double-layer photo-thermal aerogel evaporator, namely the lightweight porous aerogel material ppy-Cu2O / NF / FCP with the double-layer structure. The device has the advantages that the high-level evaporation rate and efficient energy conversion are achieved, and efficient photo-thermal conversion and heat management are achieved through the double-layer structure design.

The invention discloses a Janus super-wettability gradient pore structure cellulose aerogel material for efficient seawater desalination and oil-water separation as well as a preparation method and application of the Janus super-wettability gradient pore structure cellulose aerogel material. According to the aerogel material, a self-assembled gradient pore structure is matched with a high-strength bio-based skeleton formed by chemical crosslinking, an enhanced chemical crosslinking-physical strengthening network structure is formed, and finally solution replacement and normal-pressure drying are performed in absolute ethyl alcohol to obtain the aerogel material. Under the support of a chemical crosslinking effect and a gradient pore physical structure formed by self-assembly of the material, the integrity and mechanical strength of the pore wall of the obtained material are ensured, and meanwhile, in the aerogel preparation and modification process of PVA, PEI and MTMS, the material has excellent upper and lower double-layer super-hydrophobic and super-hydrophilic asymmetric wettability; therefore, the composite material has efficient oil-water emulsion separation performance, lasting super-hydrophilic / underwater super-oleophobic stability, excellent mechanical performance and seawater desalination treatment performance in a high-salinity environment.

The application discloses a MnFe2O4 / GO wave-absorbing aerogel with a directional aperture structure and a preparation method thereof, belongs to the technical field of wave-absorbing material preparation, and is characterized in that manganese ferrite (MnFe2O4) magnetic particles are uniformly loaded on the surface of graphene to obtain a graphene aerogel with a three-dimensional loose porous structure and magnetic particle assembly; the MnFe2O4 is prepared by using a low-temperature co-precipitation method, and the MnFe2O4 / GO wave-absorbing aerogel is prepared by combining directional freezing and heat treatment, and the method is mild and simple. The application improves the impedance mismatch problem of the graphene material, enhances the magnetic loss of the material, and obtains a novel porous aerogel wave-absorbing material which has both dielectric loss and magnetic loss by introducing the manganese ferrite.

The invention discloses a stirring and separating device for aerogel preparation, and relates to the technical field of aerogel preparation, the stirring and separating device comprises a stirring tank, a centrifugal assembly and a stirring assembly, the stirring tank is internally provided with the centrifugal assembly, and the bottom end of the centrifugal assembly is fixedly connected with the stirring assembly; the stirring assembly comprises a stirring assembly arranged in the stirring tank, and a driving assembly is arranged at the top end of the stirring assembly; the centrifugal assembly comprises a separation assembly, and an adjusting assembly is arranged on the side face of the separation assembly. According to the aerogel preparation device, uniform stirring and impurity cleaning in the aerogel preparation process can be achieved, and the aerogel production efficiency is reduced.

The invention belongs to the technical field of building materials, and particularly relates to a building thermal insulation aerogel material and a preparation method, the aerogel material comprises the following components by mass: 25-35 parts of a silicon source, 40-80 parts of a solvent, 0.3-0.6 part of a catalyst, 4-13 parts of an aluminum source, 9-20 parts of reinforcing fibers, 4-10 parts of a modifier, and 20-40 parts of carrier fibers; the silicon source is ethyl orthosilicate or methyl trimethoxy silane; the solvent is absolute ethyl alcohol; the catalyst is hydrochloric acid or ammonia water; the aluminum source is aluminum nitrate nonahydrate or aluminum isopropoxide; the reinforced fibers are nano titanium dioxide fibers; the modifying agent is gamma-aminopropyl triethoxy silane or gamma-methacryloyloxy propyl trimethoxy silane, and the modifying agent is gamma-aminopropyl triethoxy silane or gamma-methacryloyloxy propyl trimethoxy silane; the carrier fiber is rock wool or mineral wool. According to the invention, the thermal insulation aerogel material for buildings, which is high in mechanical strength, good in weather resistance and excellent in thermal insulation performance, can be prepared, so that the requirements of the building industry on high-performance thermal insulation materials can be met.

The invention discloses a multi-site intelligent response type CO2 gas channeling prevention gel and a preparation method, and belongs to the field of chemical oil displacement, and the preparation method comprises the following steps: taking a carbon dioxide response type monomer, acrylamide and sodium acrylate as monomers, and adopting water-soluble free radical polymerization to prepare a CO2 response type copolymer; the CO2 response type copolymer, a cross-linking agent, a stabilizer, a retarder and formation water are prepared into a polymer cross-linking agent mixed solution, a cross-linking reaction is carried out under the conditions of formation temperature and mineralization degree, and the multi-site intelligent response type CO2 gas channeling prevention gel is obtained. The gel effectively solves the problems that a traditional anti-channeling agent is poor in injectivity in a low-permeability and ultra-low-permeability oil reservoir and cannot achieve deep channeling sealing, CO2 gas channeling fractured channels can be effectively blocked, the carbon dioxide oil displacement effect is remarkably improved, and key technical support is provided for large-scale application of carbon dioxide displacement.

The invention discloses a preparation method of biomass fiber aerogel for micro-plastic adsorption, and belongs to the field of micro-plastic adsorption. The preparation method comprises the following steps: (1) preparing a covalent cross-linking mixture by taking biomass nanofibers as a base material; (2) carrying out foaming treatment on the covalent cross-linking mixture by using a surfactant; (3) carrying out circulating freezing and thawing treatment on the covalent cross-linking mixture subjected to foaming treatment; and (4) performing normal-pressure drying on the covalent cross-linking mixture subjected to circulating freezing and thawing treatment to obtain the biomass fiber aerogel. The biomass fiber aerogel material obtained by the invention has high porosity and can effectively adsorb various micro-plastics, and the preparation process used in the invention does not need critical condition drying equipment, so that the preparation cost and period of aerogel are reduced, and the biomass fiber aerogel material has industrial large-scale production potential.

The present invention relates to the field of solar-driven interfacial photothermal evaporation technology, and more particularly to a solar-driven interfacial evaporator based on TiN / polyimide aerogel, its preparation method, and application. The TiN / polyimide aerogel comprises a polyimide aerogel matrix with vertical channels connecting upper and lower surfaces, loaded with TiN nanoparticles. The aerogel is prepared by polycondensation, dehydration, and cyclization of the polyimide aerogel 4,4'-diaminodiphenyl ether and 4,4'-oxydiphthalic anhydride. The TiN / polyimide aerogel provided by the present invention, when used as a solar-driven interfacial evaporator, can not only improve the water transfer performance of a three-dimensional photothermal evaporator, but also increase the photothermal evaporation rate during seawater desalination.

The invention discloses a graphene oxide-chitosan-carboxymethyl cellulose composite aerogel and an application of the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel in adsorption of amaranth. The preparation method comprises the following steps: mixing a carboxymethyl cellulose aqueous solution with a chitosan acetic acid solution, adding gallic acid, stirring until the gallic acid is completely dissolved, adding the graphene oxide dispersion liquid, and stirring until a system forms uniform and stable gel; the gel is firstly subjected to ultralow-temperature freezing and then subjected to freeze drying, and finally the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel is obtained. The aerogel prepared by the method is environment-friendly and stable in pore structure, and is a composite aerogel material with high adsorption capacity and good regeneration performance on anionic dyes. The adsorption capacity of the aerogel to amaranth can reach 125 mg / g, the adsorption rate is still kept at 77% after the aerogel is recycled for 3 times, and the aerogel is suitable for efficient treatment of dye wastewater.

The invention provides an aluminum oxide aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of aluminum oxide aerogel preparation. The preparation method provided by the invention comprises the following steps: (1) preparing aluminum sol by taking coal gangue as an aluminum source; (2) mixing the aluminum sol obtained in the step (1) with aluminum silicate fibers, and performing gelation to obtain composite hydrogel; and (3) mixing the composite hydrogel obtained in the step (2) with ethanol, aging, mixing with a modifier, modifying, and carrying out graded normal-pressure drying to obtain the aluminum oxide aerogel composite material, the modifier in the step (3) is one or more of absolute ethyl alcohol, tetraethoxysilane and normal hexane. The alumina aerogel composite material prepared by the preparation method provided by the invention has the characteristics of low density, low heat conductivity coefficient and high strength, and is suitable for the high-temperature processing field of special materials and the aerospace field.

The present disclosure relates to materials and systems to manage thermal runaway issues in energy storage systems. Exemplary embodiments include a barrier having a mechanically compressible layer that allows fluid flow through the barrier. The present disclosure further relates to a battery module or pack with one or more battery cells and the barrier placed in thermal communication with the battery cells.

The invention belongs to the technical field of carbon aerogel, and particularly relates to nitrogen-doped carbon aerogel as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) uniformly mixing a carbon source, a nitrogen source and a solvent to obtain nitrogen-doped gel; (2) aging the nitrogen-doped gel, and drying to obtain nitrogen-doped dry gel; and (3) carbonizing the nitrogen-doped dry gel to obtain the nitrogen-doped carbon aerogel. The preparation method is simple in process and low in cost, and the prepared nitrogen-doped carbon aerogel has a high specific surface area, a rich pore structure and good magnetic performance, and has a wide application prospect in the fields of environmental governance and energy storage. According to the invention, pollutants in wastewater can be efficiently adsorbed, and rapid separation and recovery can be realized under the action of an external magnetic field; in energy storage, the material shows excellent electrochemical performance as an electrode material of a supercapacitor.

The invention belongs to the technical field of air purification, and discloses a nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2-graphene aerogel composite material as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: taking a nitrogen-containing organic heterocyclic ligand, a nitrogen doping agent, a non-noble metal salt compound and chitosan, carrying out a first hydrothermal reaction, carrying out tannic acid etching and first calcination treatment, carrying out MnO2 in-situ growth on the obtained nitrogen-doped MOF derived hollow porous carbon material, and introducing a rare earth metal salt compound to obtain the nitrogen-doped MOF derived hollow porous carbon material. And finally, taking the obtained nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2 composite material, graphene oxide and a reducing agent to carry out second hydrothermal reaction, ethanol soaking, freezing and freeze-drying treatment to obtain the nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2 composite material. The nitrogen-doped MOF-derived hollow porous carbon-rare earth metal doped MnO2-graphene aerogel composite material has excellent adsorption and catalytic degradation activity on TVOC (Total Volatile Organic Compounds) such as formaldehyde and the like, and the composite material has a good application prospect in air purification.

A natural aldehyde-functionalized all-biomass aerogel and a preparation method thereof, the method comprises: (1) dispersing chitosan in a starch-like fiber solution and stirring to obtain a uniform mixed solution; (2) adding genipin as a crosslinking agent to the mixed solution obtained in step (1), heating and stirring for a period of time to obtain an aerogel precursor solution, and allowing the same to stand to undergo crosslinking to obtain a hydrogel; (3) freezing the hydrogel obtained in step (2), and then freeze-drying to obtain an aerogel; (4) soaking the aerogel obtained in step (3) in a natural aldehyde solution for graft modification, then removing and rinsing, and subsequently drying to obtain the aldehyde-functionalized aerogel.

Disclosed are an alumina porous material and its preparation and application. The porous material has substantially orderly distributed spherical or quasi-spherical cavities inside, the cavities have an average diameter of 100-500 nm, and at least a part of adjacent cavities are connected through mesopores. The alumina porous material is suitable for being used as a support for preparing a heavy residue hydroprocessing catalyst, or as a support for catalysts used in other macromolecular catalytic processes.

The application discloses a kind of metal-loaded starch aerogel and its preparation method and application, comprising the following steps: (1) starch and water are prepared into starch milk, starch milk is heated, and gelatinized starch solution is obtained;(2) sodium laurate is added to the gelatinized starch solution and heated to react, and after the reaction is completed, starch-sodium laurate complex solution is obtained;(3) metal nitrate solution is added to the above-mentioned complex solution, and after stirring uniformly, a reducing agent is added to reduce metal ions, and metal-loaded starch hydrogel is obtained;(4) the above-mentioned hydrogel is pre-frozen and freeze-dried to obtain metal-loaded starch aerogel.The metal-loaded starch aerogel of the application has excellent ethylene adsorption capacity, with an adsorption capacity of about 32 mL / g, good adsorption stability, and the adsorption process can be carried out at normal temperature and pressure, which can be used for fruit preservation.

The preparation method comprises the following steps: firstly, dispersing hydroxylated carbon nanotubes in water, carrying out ultrasonic treatment to form a uniform dispersion liquid, and then uniformly mixing the uniform dispersion liquid with a bacterial cellulose dispersion liquid, so as to obtain the carbon nanotube-based aerogel with the photo-thermal electric heating effect. Adding methyltrimethoxysilane sol which is hydrolyzed in advance, stirring to form a precursor system, and then performing directional freezing, freeze drying and heat treatment to obtain the carbon nanotube-based aerogel with the photo-thermoelectric heating effect. The carbon nanotube-based aerogel has the super-hydrophobic characteristic, the surface water contact angle is 161 DEG C, the surface temperature is rapidly increased to 126.7 DEG C under applied voltage, photo-thermal response is rapidly generated under simulated sunlight irradiation, the surface temperature is rapidly increased to 117.7 DEG C, and the carbon nanotube-based aerogel is suitable for rapid adsorption and separation of high-viscosity crude oil, has excellent chemical stability and mechanical stability, and can be used in the field of adsorption and separation of high-viscosity crude oil. And after the surface is broken, excellent super-hydrophobic performance and efficient photo-thermal-electric-thermal response capability are still kept.

The invention relates to the technical field of aerogel wave-absorbing materials, in particular to a multi-scale structure composite carbon aerogel wave-absorbing material and a preparation method thereof. The aerogel wave-absorbing material comprises a three-dimensional skeleton, a functional component and a conductive network. The three-dimensional skeleton is of a hierarchical porous structure formed by crosslinking two-dimensional graphene oxide and one-dimensional aramid nanofibers through hydrogen bonds, the functional component is zero-dimensional CoFe2O4 nanoparticles which are uniformly dispersed on the three-dimensional skeleton through in-situ growth, and the conductive network is an sp / sphybrid carbon matrix formed by carbonizing the three-dimensional skeleton and the functional component at high temperature. Through multi-dimensional cooperative construction of the zero-dimensional CoFe2O4 nanoparticles, the one-dimensional aramid nanofibers and the two-dimensional graphene, a rich heterogeneous interface and a polarization center are formed in the material, the electromagnetic wave loss capacity is remarkably enhanced, the broadband efficient wave absorbing requirement can be met, and the electromagnetic compatibility of aerospace electronic equipment is remarkably optimized.

The invention relates to a high-entropy alloy aerogel material with a dielectric near-zero characteristic as well as a preparation method and application of the high-entropy alloy aerogel material. The high-entropy alloy aerogel material is a three-dimensional porous structure material prepared from Cu, Co, Ni, Ag and Bi metal salts through a freeze thawing method. Compared with the prior art, the high-entropy alloy aerogel material prepared by the preparation method disclosed by the invention realizes the dielectric near-zero characteristic near the radio frequency of 10.3 MHz, also has higher charge transfer efficiency, and has important significance in the design aspect of radio frequency electronic devices.

The invention provides chitosan-based polymer composite aerogel as well as a preparation method and application thereof. The preparation method of the chitosan-based polymer composite aerogel comprises the following steps: homogenizing phosphate functionalized boron nitride nanosheets in water to obtain a suspension; mixing the suspension liquid, chitosan powder and ferric salt to form composite gel; and drying to obtain the chitosan-based polymer composite aerogel. The mass ratio of the chitosan to the phosphate functionalized boron nitride nanosheet to the iron salt is 1: (0.5 to 2.5): (0.08 to 0.3). According to the preparation method disclosed by the invention, a ternary cross-linked hierarchical network structure is constructed by utilizing coordination cross-linking of iron ions and chitosan molecular chains and a chelation effect of phosphate ester groups on the surfaces of boron nitride nanosheets, so that the composite aerogel with low density and high specific strength is prepared; efficient flame retardance can be achieved through a triple synergistic mechanism of a physical barrier, free radical capture of phosphorus elements and catalytic char formation of iron ions.

The present invention provides a modified silica aerogel powder having a higher water repellency and a larger contact angle, and a method for producing the same. At the same time, the present invention provides an aerogel slurry having a lower thermal conductivity and a method for producing the same. The present invention also provides a method for producing an aerogel insulating felt having low thermal conductivity, high mechanical strength, and capable of relatively well resolving the problem of powder shedding. The method for producing the modified silica aerogel powder includes the steps of (1) modifying halloysite nanotubes with dodecyl methacrylate and pentafluorophenyl methacrylate, (2) preparing a silica sol, (3) adding the modified halloysite nanotubes to the silica sol to prepare a wet gel, and (5) preparing the wet gel into the modified silica aerogel powder. The present application also provides a method for producing an aerogel slurry from the modified silica aerogel powder, and a method for producing an aerogel insulating felt from the aerogel slurry.

The invention discloses conductive flame-retardant thermal-insulation aerogel capable of enhancing room-temperature catalytic formaldehyde degradation as well as a preparation method and application of the conductive flame-retardant thermal-insulation aerogel, and relates to the technical field of graphene-based aerogel. The preparation method comprises the following steps: loading a transition metal oxide catalyst with a formaldehyde catalytic oxidation performance on a graphene oxide sheet layer through a coprecipitation method; uniformly mixing the graphene loaded with the transition metal oxide catalyst in a sodium alginate aqueous solution, and performing freeze drying; and soaking in a mixed solution containing calcium salt and boric acid for cross-linking reaction, and then freeze-drying again to obtain the product. The material has good flame retardance and thermal insulation performance, can enhance the catalytic oxidation efficiency of low-concentration formaldehyde at room temperature under the assistance of a stable and controlled external electric field, realizes the long-term catalytic degradation effect on formaldehyde at room temperature, and can be applied to the field of buildings, such as buildings, buildings and the like. The multiple purposes of efficient heat preservation of the building envelope structure, remarkable improvement of fireproof safety and effective control of indoor formaldehyde pollution are achieved.

The invention is applicable to the technical field of sunlight utilization and wastewater treatment, and provides a preparation method and application of a photo-thermal-photocatalytic solar interface evaporator. According to the method, alkalized polyacrylonitrile aerogel is used as a matrix framework, BiOI-Bi-Bi2O3 composite particles are used as main photo-thermal-photocatalytic functional materials, and the photo-thermal-photocatalytic solar interface evaporator is prepared. And the single layer of Ti < 3 > C < 2 > T < x > MXene is used as a synergistic photo-thermal and photo-photocatalytic auxiliary agent. According to the prepared composite aerogel, BiOI, Bi2O3 and Bi are combined to form a stable interface heterostructure, and meanwhile, full-wave-band efficient utilization of a solar spectrum is realized by utilizing single-layer Ti < 3 > C < 2 > T < x > MXene. The evaporator can be used for effectively treating a water source containing complex pollutants and synchronously realizing desalination and deep purification. The evaporator has remarkable effects in the aspects of improving the photo-thermal conversion efficiency, optimizing the evaporation process and the resource utilization rate, protecting the environment, saving energy and the like, and has wide application prospects in the aspects of water resource shortage and water environment pollution.

The present disclosure relates to an aerogel composite having excellent insulation even when exposed to a high-temperature environment. An aerogel composite comprising: a fiber substrate; and aerogel including one or more pores, wherein a surface resistance at room temperature (23±2° C.) of the aerogel composite is 1×1012 Ω / sq to 1×1016 Ω / sq; a surface resistance measured after heating the aerogel composite at a temperature of 200° C. for 1 hour is 1×1012 Ω / sq to 1×1016 Ω / sq; and the aerogel composite has R200, which is a real number of 0 to 4, in Equation 1 below:R200=log10⁢ {(Surface⁢ resistance⁢ of⁢ aerogel⁢ composite⁢
 after⁢ heating⁢ at⁢ 200⁢°⁢ C⁢ for⁢ 1⁢ hour) / 
(Surface⁢ resistance⁢ of⁢ aerogel⁢ composite⁢ before⁢ heating)}.[Equation⁢ 1]