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227 results about "Functionalized graphene" patented technology

Chemical functionalization of graphene is one of the key subjects in graphene science and technology, and has been extensively studied. The funtionalization proceeds mainly through chemical atom doping, diazonium coupling, silanization, amidation, etherisation, substitution and cycloaddition, etc.

Adsorbent as well as preparation method and application thereof

The invention relates to an adsorbent and a preparation method and application thereof, the adsorbent comprises a polymer matrix and a nanofiller uniformly embedded in the polymer matrix, the polymer matrix comprises a calcium / boron cross-linked polyvinyl alcohol-sodium alginate blend, and the nanofiller is sulfonic acid / carboxylic acid functionalized graphene oxide; the mass fraction of the nano filler in the adsorbent is 0.05%-0.60%; wrinkles and irregular hole structures are distributed on the surface of the adsorbent. The adsorbent is used for removing tritium in water and is high in adsorption capacity, stable in structure and good in recycling performance. The removal rate of tritium in the single-stage adsorption process is greater than 8.5%, and the removal rate of tritium in the third-stage adsorption process is 19.4-57.7%.
Owner:LANZHOU UNIV

High-strength modified polyethylene composite fiber and preparation method thereof

The invention discloses a high-strength modified polyethylene composite fiber and a preparation method thereof, and belongs to the technical field of fiber materials, carboxylated mesoporous silica microspheres are used as a matrix, the surface of the matrix is coated with a graphene sheet layer, then hydroxyethyl methylacrylate is grafted, functionalized graphene / mesoporous silica microspheres are obtained, the functionalized graphene / mesoporous silica microspheres are used as a filler, and the high-strength modified polyethylene composite fiber is prepared. When the polyethylene composite fiber is applied to a ship cable, the overall weight of the ship cable can be reduced, and relative slippage can be generated between graphene lamellas and mesoporous silica microspheres, so that stress is dispersed, and the strength of the polyethylene composite fiber is improved; a hydrophobic alkane long chain is introduced through esterification of the graphene / mesoporous silica microspheres and hydroxyethyl methylacrylate and graft modification of hydroxyethyl methylacrylate, so that the hydrophobic alkane long chain has good compatibility with white oil, and the microspheres are prevented from approaching and gathering by a steric hindrance effect, so that the hydrophobic alkane long chain is more uniformly and stably dispersed in the white oil.
Owner:SICHUAN DONGZE TECH CO LTD

Acrylate-epoxy resin composite coating and preparation method thereof

The invention relates to the technical field of coatings, in particular to an acrylate-epoxy resin composite coating and a preparation method thereof. According to the technical scheme, the coating is prepared from 25 to 35 parts of methyl methacrylate, 15 to 25 parts of butyl acrylate, 10 to 20 parts of epoxy resin E-5110, 8 to 15 parts of organic silicon modified acrylate prepolymer, 5 to 12 parts of fluorocarbon modified epoxy resin, 4 to 8 parts of core-shell structure corrosion inhibition nano container, 1 to 3 parts of functionalized graphene quantum dots and 4 to 10 parts of polyhedral oligomeric silsesquioxane maleimide modified amine curing agent. And 1-3 parts of a hindered amine light stabilizer. By integrating the core-shell structure corrosion inhibition nano container, the functionalized graphene quantum dots and the photo-thermal dual responsive curing agent component, the sensing, response and self-repairing of the coating on damage are realized, and long-acting corrosion resistance, weather resistance, bacteria resistance, mechanical property balance and intelligent maintenance are considered; and efficient and economical full-period protection is provided for equipment in an extreme environment.
Owner:深圳市深赛尔股份有限公司

Antistatic talcum powder and graphene composite reinforced material and in-situ polymerization process thereof

The invention provides an antistatic talcum powder and graphene composite reinforced material and an in-situ polymerization process thereof, and belongs to the technical field of polymer composite materials. According to the antistatic talcum powder and graphene composite reinforced material and the in-situ polymerization process thereof, the antistatic talcum powder and graphene composite reinforced material is prepared from the following raw materials in parts by weight: 100 parts of matrix resin, 5-30 parts of modified talcum powder, 0.5-5 parts of functionalized graphene and 0.1-2 parts of an antistatic synergist, the modified talcum powder is subjected to surface treatment by a silane coupling agent, the particle size range is 1-10 [mu] m, and the functionalized graphene is graphene oxide or reduced graphene oxide. Through the synergistic effect of the silane coupling agent modified talcum powder and the functionalized graphene and in combination with the ionic liquid antistatic agent, the surface resistance of the material is remarkably reduced. Nanoscale dispersion is realized by adopting an in-situ polymerization process, and the method is suitable for the field of high-performance engineering plastics.
Owner:LIAONING AIHAI TALC CO LTD

Graphene nano long-acting anticorrosive paint and preparation method thereof

The invention discloses a graphene nano long-acting anticorrosive paint and a preparation method thereof, and relates to the technical field of anticorrosive paints.The graphene nano long-acting anticorrosive paint is prepared from 100 parts of epoxy resin and 1.0 part of a functionalized graphene mixture; the functionalized graphene mixture comprises a component 1, namely flexible interface-aminosilane functionalized graphene, and a component 2, namely long-chain alkyl grafted hydrophobic graphene; wherein the relative weight ratio of the component 2 in the functionalized graphene mixture, defined as the weight of the component 2 / (the weight of the component 1 + the weight of the component 2), is in the range of 0.1 to 0.4. According to the invention, the dual functionalized graphene is cooperated, and gradient curing and thickness-ratio self-adaptive adjustment are combined. The obtained coating has excellent internal stress buffering capability, stable surface hydrophobicity and wide adaptability to different construction thicknesses, and is excellent in corrosion-resistant comprehensive performance.
Owner:XIAMEN MINGFU YOULIAN NEW MATERIAL CO LTD

Amino-functionalized graphene quantum dot modified MXene loose nanofiltration membrane as well as preparation method and application thereof

The invention discloses a preparation method and application of an amino-functionalized graphene quantum dot modified MXene loose nanofiltration membrane. The preparation method comprises the following steps: mixing an MXene nanosheet dispersion liquid with an aminated graphene quantum dot aqueous solution, and preparing an amino functionalized graphene quantum dot / MXene mixed dispersion liquid by adopting a self-assembly method; and filtering and depositing the obtained mixed dispersion liquid on the modified base membrane to obtain the MXene loose nanofiltration membrane. According to the preparation method disclosed by the invention, the zero-dimensional aminated graphene quantum dots are creatively embedded into the MXene nanosheets, so that the MXene loose nanofiltration membrane which is stable in structure and regular in stacking is prepared. The nanofiltration membrane has good separation performance on different dyes and inorganic salts while effectively inhibiting water swelling, is a next-generation separation membrane with high stability and high selectivity, is mild and simple in preparation process, and has a wide application prospect.
Owner:SUN YAT SEN UNIV

High-temperature-resistant and aging-resistant wire and cable material and preparation method thereof

The invention relates to the technical field of wire and cable materials, and discloses a high-temperature-resistant and aging-resistant wire and cable material and a preparation method thereof.The high-temperature-resistant and aging-resistant wire and cable material is prepared from, by weight, modified polyetherimide, silane modified polyolefin, organic montmorillonite, surface modified nanometer aluminum oxide and surface functionalized graphene, an antioxidant, a silane coupling agent and a processing lubricant; the preparation method of the high-temperature-resistant and aging-resistant wire and cable material comprises the following steps: weighing and preparing raw materials; carrying out surface modification treatment on the nanofiller; drying the raw materials; premixing the components; reacting, extruding and granulating; and cooling, bracing and dicing. By adopting the technical scheme of synergistic application of the surface functionalized graphene and the silane modified polyolefin, the technical effect of remarkably improving the thermal stability and the mechanical property of the composite material is achieved, the problem that the performance of a traditional scheme is unstable at high temperature is solved, and the phenomena of filler agglomeration and material degradation are avoided.
Owner:GUANGZHOU HENGXING WIRE FLUORINE PLASTIC CO LTD +1

High-conductivity porous polymer composite material and preparation method thereof

PendingCN120737580APolymer scienceNanowire
The invention discloses a high-conductivity porous polymer composite material and a preparation method thereof, and relates to the technical field of conductive composite materials. The high-conductivity porous polymer composite material is prepared by mixing polyether-ether-ketone, amino-functionalized graphene, a silver nanowire / carbon nanotube hybrid filler, a porous polyimide microsphere carrier, an ionic liquid and an antioxidant. The preparation method comprises the following steps: preparing amino-functionalized graphene; preparing a hybrid filler microsphere complex; performing mixing; preparing a porous prefabricated body; and carrying out mould pressing and shaping. According to the composite material disclosed by the invention, through multi-scale structural design and environment-friendly process innovation, high conductivity, high-strength mechanical properties and light weight are realized under the condition of low filler addition amount.
Owner:YANGZHOU SHUOHE NEW MATERIALS CO LTD

Silane functionalized graphene oxide / waterborne polyurethane hydrophobic coating and preparation

The invention discloses a silane functionalized graphene oxide / waterborne polyurethane hydrophobic coating and preparation, and belongs to the technical field of paints.The silane functionalized graphene oxide / waterborne polyurethane hydrophobic coating is prepared by the steps that natural graphite powder serves as a raw material, and graphene oxide is prepared through a Hummer method; n-(beta-aminoethyl)-gamma-aminopropyl trimethoxy silane is grafted to the surface of the graphene oxide through a chemical reduction method, and GO-AATS composite filler is obtained; then, castor oil is used as a soft segment, isophorone diisocyanate is used as a hard segment, and a series of GO-AATS-WPU emulsions are prepared. According to the silane functionalized graphene oxide / waterborne polyurethane hydrophobic coating and preparation, chemical bonds are formed between graphene oxide and waterborne polyurethane, and the interfacial compatibility of graphene oxide and waterborne polyurethane is improved, so that the mechanical property, water resistance, corrosion resistance and thermal stability of the waterborne polyurethane coating are improved.
Owner:ZHENGZHOU UNIV

Preparation method and application of wear-resistant and corrosion-resistant glass flake coating

The invention provides a preparation method and application of a wear-resistant and corrosion-resistant glass flake coating, and belongs to the technical field of coatings. The coating comprises a component A and a component B, wherein the component A comprises an epoxy resin matrix, a reinforcing filler, a self-repairing microcapsule and an auxiliary agent; the epoxy resin matrix is formed by compounding at least two different types of epoxy resin components, the first epoxy resin component is matrix resin, and the second epoxy resin component is toughening modified resin; the reinforcing filler comprises glass flakes subjected to surface modification, functionalized graphene and nano zirconium dioxide particles; the self-repairing microcapsule comprises a microcapsule wall and a self-repairing agent coated in the microcapsule wall; the auxiliary agent comprises a rheological auxiliary agent, a defoaming agent and a wetting dispersant; and the component B comprises a curing agent and a curing accelerator. The comprehensive wear resistance and corrosion resistance of the coating can be remarkably improved, and the construction adaptability of the coating is improved.
Owner:LIAONING BAOSHAN ECOLOGICAL COATING CO LTD

Self-repairing graphene-based wind driven generator blade protective film and preparation method thereof

The invention discloses a self-repairing graphene-based wind driven generator blade protection film and a preparation method thereof, and relates to the technical field of wind power generation equipment protection. The protection film adopts a gradient structure of a bonding buffer layer, a self-repairing functional layer and a multifunctional protection layer; the self-repairing functional layer comprises a hybrid network formed by hydroxylated functionalized graphene and elastomer particles and bionic packaging microcapsules, inner layer capsules containing graphene quantum dot reinforced resin and a latent catalyst curing agent are packaged in the microcapsules, multiple times of repairing of the same damaged area can be achieved, and the repairing strength is high; the multifunctional protective layer endows the coating with super-hydrophobic, anti-icing and ultraviolet-resistant functions through fluorinated graphene and nano TiO2 (at) ZnO composite particles; the preparation process is mature, the comprehensive protection performance is excellent, and the coating is suitable for wind driven generator blade protection in the severe environment.
Owner:ZHEJIANG AMBRERA NEW MATERIAL MFG CO LTD

Preparation method and application of functionalized graphene and graphene film for removing tritium from radioactive waste liquid

The invention discloses functionalized graphene for removing tritium from radioactive waste liquid and a preparation method and application of a graphene film, the functionalized graphene is a flaky substance formed by stacking lamellar structures, and the distance between the stacked lamellar structures is 7.5-8.7. The preparation method comprises the following steps: preparing graphene oxide powder; performing sulfonation on the graphene oxide powder to obtain sulfonated graphene aerogel; performing carboxylation on the graphene oxide powder to obtain carboxylated graphene; and mixing and stirring the sulfonated graphene aerogel and carboxylated graphene to obtain the functionalized graphene. The tritium in the tritium-containing liquid is separated by utilizing the membrane formed by the functionalized graphene, and the tritium removal technology has the advantages of mild reaction conditions, low energy consumption, easiness in large-scale production and the like.
Owner:NUCLEAR POWER INSTITUTE OF CHINA

Preparation method of high-thickness graphene heat-conducting film

The invention belongs to the technical field of functional films, and particularly relates to a preparation method of a high-thickness graphene heat conduction film. Comprising the following steps: (1) low-functionalized graphene powder is taken as a raw material, the content of an additive in the raw material is not more than 20wt%, and the solvent content is not more than 10wt%; (2) carrying out hot press molding on the raw materials in the step (1) at the temperature of 25-300 DEG C to obtain a dense graphene thick film; and (3) carrying out heat treatment on the dense graphene thick film in the step (2) in an atmosphere furnace with the temperature of 1000-3300 DEG C for a certain time to ensure interlayer ordering and crystal graphitization, so as to obtain the graphene heat-conducting film with high thickness and high heat conductivity, the thickness of the graphene heat-conducting film can reach more than 200 microns, and the heat conductivity of the graphene heat-conducting film can reach more than 1300W / mK. The preparation method is simple in operation process, low in cost, easy in scale amplification and suitable for preparation and performance improvement of the ultra-high-thickness graphene heat-conducting film, and the application range of the graphene film in the fields of heat management, electromagnetic shielding, nuclear technology, high-end instrument equipment and the like is widened.
Owner:TSINGHUA SHENZHEN INTERNATIONAL GRADUATE SCHOOL

Corrosion-resistant cable material, energy storage cable and preparation method thereof

The invention discloses a corrosion-resistant cable material, an energy storage cable and a preparation method of the corrosion-resistant cable material, and belongs to the technical field of cables. The corrosion-resistant cable material comprises the following raw materials: a hexadecylamine functionalized graphene bentonite copolymer, modified epoxy resin E5, chlorinated polyethylene, a plasticizer, paraffin, mica powder and an antioxidant. The hexadecylamine functionalized graphene bentonite copolymer is obtained by adding acidified bentonite into a graphene dispersion liquid, stirring and then carrying out hydrophobic modification through hexadecylamine; the modified epoxy resin E51 and 5-aminosalicylic acid are subjected to a hydrothermal reaction to obtain nitrogen-doped quantum dots, the nitrogen-doped quantum dots are ultrasonically mixed with ethyl alcohol, then the waterborne curing agent is added, then the epoxy resin E51 is added, and high-speed stirring is performed to obtain the cable material, the cable material has good waterproofness, corrosion resistance and mechanical performance, and stable operation of an energy storage cable can be guaranteed.
Owner:HUNAN HUALITONG CABLE +1

A general method for the electrochemical preparation of covalently functionalized graphene

The application belongs to the technical field of graphene material preparation, and particularly relates to a general covalent functionalized graphene (CFG) electrochemical preparation method, which comprises the following steps: (1) under the condition of a light sealing oil seal, graphite electrodes are subjected to electrochemical intercalation treatment by using concentrated sulfuric acid; (2) after the intercalation is completed, light sealing oil is injected into an electrolytic cell while the concentrated sulfuric acid is discharged; (3) in the electrolytic cell, a micro-liquid film reaction zone is constructed by using the density and phase solubility difference of the light sealing oil, the aqueous electrolyte and the heavy sealing oil, and the micro-liquid film reaction zone is contacted with the intercalated graphite electrode to make the intercalated graphite electrode electrochemically oxidized to generate CFG; (4) by controlling the relative intercalated graphite electrode of the micro-liquid film reaction zone to move directionally, the whole intercalated graphite electrode is gradually and completely converted into CFG; (5) the CFG structure after the reaction is placed into a solvent to be mechanically exfoliated to prepare a CFG dispersion liquid, and the CFG powder is obtained after drying treatment.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Method for producing a sorption material based on graphene oxide aerogels

The invention relates to a method for producing a sorption material (10) on the basis of functionalized graphene aerogels and to the resulting sorption material (10). The method comprises the production of a water-based gel (18), the extrusion thereof and subsequent freeze-drying. The sorption material (10) is suitable for use as a sorption element in adsorption processes, in particular for separating carbon dioxide from ambient air.
Owner:VOLKSWAGEN AG

Cable sheath capable of improving shielding effect and preparation method thereof

The invention relates to the technical field of polymer composite materials, and discloses a cable sheath capable of improving a shielding effect and a preparation method thereof, the cable sheath capable of improving the shielding effect comprises the following components by weight: 70-110 parts of a polymer matrix precursor; 2 to 5 parts of an isocyanate group functionalized carbon nanotube; 1 to 3 parts of furfuryl functionalized graphene; 2 to 5 parts of nano manganese zinc ferrite; the polymer matrix precursor comprises polyether polyol and diisocyanate, and the cable sheath also comprises one or more of the following auxiliary additives: an antioxidant, a crosslinking agent, a crosslinking agent, a crosslinking agent, a crosslinking agent and a crosslinking agent. An ultraviolet absorber; a lubricant; and a foaming nucleating agent. According to the invention, by constructing a carbon nanotube / ferrite synergistic shielding network and a thermally reversible crosslinking network, the cable sheath has the functions of broadband efficient shielding and thermally induced self-repairing.
Owner:TONG YING DIAN YE SHEN ZHEN YOU XIAN GONG SI

A heterogeneous membrane with different functionalized channels and its preparation method and application

The application provides a heterogeneous membrane with different functional channels and a preparation method thereof, and the heterogeneous membrane comprises a base membrane and a double-sided graphene oxide membrane deposited on one side surface of the base membrane, wherein the double-sided graphene oxide membrane is sequentially deposited by amine group functionalized graphene oxide nanosheets and sulfonic acid group functionalized graphene oxide nanosheets by a vacuum filtration method. By changing the group type and distribution in the graphene oxide nanochannel, the application constructs a superimposed heterogeneous layer with ion rapid transmission function and lithium-magnesium high-efficiency separation function, and can effectively prevent magnesium ions from passing through while rapidly transmitting lithium ions, so that high-efficiency separation of lithium and magnesium is realized, and the application has a wide application prospect in the field of lithium extraction from salt lake brine and the like.
Owner:EAST CHINA UNIV OF SCI & TECH

High-efficiency planar heating element using graphene-based nanohybrid structure, and manufacturing method therefor

PCT designated stageWO2026141711A1Inorganic particleGraphene flake
The present invention relates to a planar heating element comprising: a heating layer including graphene flakes, functionalized graphene and a nanohybrid material; and an electrode electrically connected to the heating layer, wherein the nanohybrid material has the functionalized graphene self-adsorbed on the surfaces of thermally conductive inorganic particles.
Owner:BESTGRAPHENE CO LTD

Oil-soluble Mo-functionalized graphene composite material as well as preparation method and application thereof

The invention discloses an oil-soluble Mo-functionalized graphene composite material as well as a preparation method and application thereof, and belongs to the field of lubricating oil additives. The preparation method comprises the following steps: (1) mixing a Mo-functionalized graphene composite material with an organic solvent, and performing ultrasonic treatment to form a solution A; (2) adding an amine reducing agent into the solution A, carrying out reduction reaction, filtering and washing to obtain a filter cake; and (3) mixing a long-chain organic compound, a coupling agent and a surfactant, performing ultrasonic treatment to form a mixed solution B, performing ultrasonic dispersion on the filter cake into the mixed solution B, and performing heating treatment, cooling, filtering, washing and drying to obtain the oil-soluble Mo-functionalized graphene composite material. Through partial reduction and chemical grafting processes, the Mo-functionalized graphene composite material is subjected to selective reduction firstly, then a coupling agent is utilized to graft a long-chain organic compound to the surface of the composite material, and an oil-soluble group is introduced, so that the dispersion stability and the anti-wear and anti-friction performance in lubricating oil are remarkably improved.
Owner:HEZE BRANCH QILU UNIV OF TECH(SHANDONG ACAD OF SCI

PETG (Polyethylene Terephthalate Glycol) thermal shrinkage film with shading performance

Aiming at the problems that a traditional shading film is low in transparency, poor in mechanical property, non-degradable and the like, the dispersity of an opacifying agent (surface modified TiO and functionalized graphene) is optimized through a nano-composite technology, and a multi-layer co-extrusion structural design (such as PETG / shading layer / PETG) is combined, so that the shading performance of the shading film is improved, and the shading performance of the shading film is improved. The visible light transmittance (30-60%) is kept, and meanwhile efficient broad-spectrum blocking of ultraviolet rays (larger than or equal to 95%) and infrared rays (larger than or equal to 80%) is achieved. The process disclosed by the invention is compatible with conventional extrusion stretching equipment, has high shading property, mechanical strength, working stability and environmental protection property, and is suitable for the high-end packaging fields needing shading protection, such as food, medicine and electronic elements.
Owner:烟台富利新材料科技有限公司

Bis-amino sequence functionalized graphene oxide immobilized enzyme as well as preparation method and application thereof

The invention discloses a double-amino sequence functionalized graphene oxide immobilized enzyme as well as a preparation method and application thereof, and relates to the technical field of graphene oxide immobilized enzymes. The method comprises the following steps: grafting polydopamine to the surface of graphene oxide to obtain a GO-coated PDA material; reacting the GO-coated PDA material with an amino functional reagent in a first dispersion system, centrifuging, cleaning and drying to obtain a double-amino sequentially-functionalized graphene oxide material; the double-amino sequentially functionalized graphene oxide material is used for immobilizing a target enzyme; the amino functional reagent is polyethyleneimine and / or polyethanolamine. The preparation process of the double-amino sequence functionalized graphene oxide material provided by the invention is simple, and the process conditions are mild. The immobilized enzyme prepared from the material not only has better reusability, but also has better catalytic performance and stability than free enzyme when being practically used for preparing catalytic reaction products.
Owner:HUAZHONG UNIV OF SCI & TECH

Functionalized graphene and methods of use thereof

A graphene-based composition is disclosed comprising functionalized graphene powder produced by detonation, plasma synthesis, liquid phase exfoliation, mechanical exfoliation among other graphene production methods known in the art. The graphene powder includes oxygen-containing functional groups such as hydroxyl, epoxy, carbonyl, and carboxyl, with a carbon-to-oxygen atomic ratio ranging from approximately 1.0 to 99.0. The powder is dispersed in an organic solvent, non-organic solvent, aqueous medium, surfactant, or POSS-based medium at a solids concentration between about 2% w / v and 30% w / v. Methods of functionalizing the graphene powder and forming dispersions are provided, along with methods of making ink dispersions with polymer binders and printed or coated articles formed therefrom. The graphene formulations exhibit tunable surface chemistry, controlled defect structures as measured by Raman spectroscopy, and stable dispersion properties suitable for applications in printed electronics, conductive coatings, sensing platforms, and lightweight composites.
Owner:HUMMER MATTHEW +1

Preparation method of all-solid-state lithium battery electrolyte for energy storage and integrated battery

The application provides a preparation method of a full-solid-state lithium battery electrolyte and an integrated battery for energy storage, and belongs to the technical field of lithium ion secondary batteries, and can at least partially solve the problems of insufficient comprehensive performance of solid-state electrolyte, large solid-solid interface impedance, poor cycle stability, poor high-voltage adaptability and high safety risk of existing full-solid-state lithium batteries, and the application comprises the following steps: preparing a polydopamine functionalized graphene oxide aqueous solution, preparing a lithiated polyionic liquid ethanol aqueous solution, preparing a Co-N-C dispersion, preparing an electrolyte film based on the above-mentioned solutions, then preparing a positive electrode and a negative electrode, sequentially stacking the positive electrode, the electrolyte film and the negative electrode, realizing close adhesion of the solid-solid interface through hot pressing, performing gradient heat curing treatment after assembly, finally adopting aluminum plastic film packaging to obtain an integrated battery. The integrated battery prepared in the application can effectively reduce the interface impedance, improve the cycle stability and high-voltage adaptability, reduce the safety risk, and optimize the comprehensive performance.
Owner:XIAN THERMAL POWER RES INST CO LTD

Metal-functionalized graphene film, method for preparing same, and use thereof

The application provides a preparation method of a metal-functionalized graphene film, and belongs to the technical field of nanofluid mass transfer. The preparation method comprises the following steps: firstly, dispersing a palladium precursor and graphene oxide in an alcohol solvent, and growing palladium nanoparticles on the surface of the graphene oxide in situ through first heating to obtain a first dispersion liquid comprising graphene oxide loaded with the palladium nanoparticles; then adding deionized water and a reducing agent to the first dispersion liquid, stirring and performing second heating, so that the graphene oxide in the first dispersion liquid is reduced to reduced graphene oxide to obtain a second dispersion liquid comprising reduced graphene oxide loaded with the palladium nanoparticles; and finally, preparing a film from the second dispersion liquid to obtain the metal-functionalized graphene film. In other aspects of the application, a metal-functionalized graphene film obtained by the aforementioned preparation method and an application of the metal-functionalized graphene film in an electrically controlled ion separation device are also provided.
Owner:SUZHOU INST FOR ADVANCED STUDY USTC +1

Waterborne polyurethane composite coating and preparation method thereof

The preparation method comprises the following steps: adding a titanate coupling agent into a graphene oxide dispersion liquid A, and carrying out a water bath reaction, washing and drying to obtain functionalized graphene oxide; dispersing the functionalized graphene oxide in an organic solvent to obtain dispersion liquid B; the preparation method comprises the following steps: dehydrating polytetrahydrofuran under reduced pressure, adding isocyanate and polyol, and carrying out a heating reaction under the protection of nitrogen and the action of a catalyst to obtain a first reaction solution; adding a chain extender and the dispersion liquid B into the first reaction liquid, and reacting at 70-80 DEG C for 1.5-2.5 hours to obtain a second reaction liquid; cooling the second reaction liquid, and performing neutralization reaction and emulsification treatment to obtain the waterborne polyurethane composite coating. According to the functionalized graphene oxide, the interface crosslinking density can be improved, a corrosive medium can be effectively blocked, and the prepared coating is high in mechanical property, good in water resistance and excellent in corrosion resistance.
Owner:JINGJIA LIANCHUANG HUBEI NEW MATERIALS TECH CO LTD

Preparation and application of UIO66-NH2 (at) GE-TiO2 composite photo-anode based on interface amido bond modification

The invention discloses a UIO66-NH2 (at) GE-TiO2 composite photo-anode based on interface amido bond modification as well as a preparation method and application of the UIO66-NH2 (at) GE-TiO2 composite photo-anode. The preparation method comprises the following steps: firstly, enabling a titanium source precursor and carboxyl functionalized graphene to grow a GE-TiO2 photo-anode on a conductive substrate through a hydrothermal method; secondly, growing a UIO66-NH2 layer on the surface of the GE-TiO2 in situ through a secondary hydrothermal method to form a primary composite structure; and finally, carrying out condensation reaction on amino in UIO66-NH2 and carboxyl on the surface of graphene in GE-TiO2 by utilizing a condensation reagent (EDCI / HOBt) to form covalent amido bond bridging, thereby obtaining the final composite photo-anode. Strong coupling between UIO66-NH2 and GE-TiO2 is achieved by constructing a covalent amido bond interface, the amido bond serves as an efficient directional carrier transmission channel, interface charge recombination is remarkably inhibited, and therefore the photoelectrochemical water decomposition performance of the photo-anode is greatly improved. The material has a wide application prospect in the field of green hydrogen production.
Owner:NORTHWEST NORMAL UNIVERSITY

Process for producing a sorption material based on graphene oxide aerogels

The invention relates to a method for producing a sorption material (10) based on functionalized graphene aerogels, as well as the resulting sorption material (10). The method comprises the production of a water-based gel (18), its extrusion, and subsequent freeze-drying. The sorption material (10) is suitable as a sorption element in adsorption processes, in particular for the separation of carbon dioxide from the ambient air.
Owner:VOLKSWAGEN AG

Gelling material for coal-fired slag-based concrete and preparation process of cementing material

PendingCN120965191ASlagDry mixing
The invention relates to the technical field of building materials, and discloses a cementing material for coal-fired furnace slag-based concrete and a preparation process thereof.The cementing material is premixed dry powder and comprises the following components: coal-fired furnace slag subjected to mechanical force-chemical composite activation, a core-shell structure slow-release early strength agent, an instantaneous alkaline nanocrystal nucleating agent and an auxiliary exciting agent, and zwitterionic functionalized graphene. The preparation process comprises the following steps: mixing the components by a dry method to obtain premixed dry powder; the dry powder and water are mixed to form slurry, and then the slurry is subjected to phonochemical construction treatment in stages; and finally, performing low-temperature thermal cycle curing on the formed body. According to the invention, through the synergistic effect of a chemical excitation system and a physical field process, the dynamic regulation and control of the rheological property of the slurry and the accurate control of the hydration process are realized, and the prepared cementing material has the characteristics of high early strength, good working performance and high utilization rate of the coal-fired slag.
Owner:WUXI NINGCHUANG ZHIHUI ENVIRONMENTAL TECHNOLOGY CO LTD