19 results about "Graphene derivatives" patented technology

The application discloses a kind of X waveband wave-absorbing honeycomb composite layer structures based on graphene derivative, composite material and preparation method and application thereof, method steps include: honeycomb material processing: cutting and washing to honeycomb material;Configuration wave-absorbing slurry: configuration graphene derivative wave-absorbing slurry, and stirring and sanding are carried out;Two times of impregnation: aramid paper honeycomb sheet is impregnated into graphene derivative wave-absorbing slurry, then drying is carried out, and two times of impregnation are carried out;Surface bonding treatment: glass fibre and / or epoxy resin skin are bonded on the upper surface of honeycomb sheet, and conductive carbon fibre and / or epoxy resin skin are bonded on the lower surface of honeycomb sheet.The application can realize the strong absorption (RL<-15dB) characteristics of X waveband electromagnetic wave under thin thickness (8mm), and the material has good structural strength and environmental adaptability, and the preparation method is simple, the cost is moderate, and is suitable for large-scale industrial production.

A fluid quick connector incorporating Graphene or Graphene Derivatives into engaging male and female end forms that reduces oxygen and water permeation through the coolant quick connector and includes an integrated latch that eliminates the need for a separate latch component. An integrated retainer is located within the mating interior interface of the female end form and opposing exterior interface of the male end form and, in combination with an EPDM O-ring component, provide for a fluid sealing connection between the end forms which reduces permeation of oxygen and water through the body as well as reducing coolant volume loss so as to maintain an ideal (typically 50 / 50) water to Glycol ratio.

This invention discloses a method for preparing a graphene-based deodorizing spunlace nonwoven fabric, belonging to the field of spunlace nonwoven fabric technology. The method includes: S1, mixing and dispersing water, a dispersing agent, and a graphene derivative under heating conditions to obtain a graphene dispersion; S2, adding a humectant, vitamins, and an antibacterial agent to the dispersion, heating and stirring to dissolve, cooling, adding plant-based deodorizing essential oils and functional additives, stirring and filtering to obtain a functional liquid; S3, applying the functional liquid to a spunlace nonwoven fabric substrate using an impregnation or spraying process, and drying at low temperature to obtain the final product. In this invention, the graphene derivative is selected from graphene oxide, reduced graphene oxide, or graphene quantum dots, and the functional additive is selected from sodium pyrrolidone carboxylate, undecylenoyl phenylalanine, or sodium hyaluronate. The resulting nonwoven fabric has a dual deodorizing mechanism combining physical adsorption and chemical decomposition, possessing broad-spectrum antibacterial and skin-moisturizing effects, and exhibits strong process compatibility, making it suitable for large-scale production.

The invention provides a fluororubber sealing element applied to a high-temperature dynamic sealing environment and a preparation method of the fluororubber sealing element, and relates to the field of fluororubber preparation. A vinylidene fluoride / tetrafluoroethylene / perfluoromethyl vinyl ether ternary fluoroelastomer is used as a main body material, carbon black is added, and PFA micro powder activated by a plasma etching machine is used as filler; oxygen-containing groups can be introduced after plasma treatment, the interface bonding effect of the PFA and the fluororubber can be improved, meanwhile, the surface energy of the activated PFA can be closer to that of the fluororubber, a nanoscale rough structure can be generated on the surface of the PFA due to etching, the material bonding strength is improved, the sealing performance and the thermal durability are improved, and the layering risk at the high temperature can be inhibited through strong interface bonding; according to the invention, perfluoropolyether oil (PFPE) is added, and 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane (bis (penta)), octadecylamine, zinc oxide and a graphene derivative are matched, so that the high-temperature-resistant hot-tear-resistant sealing element is prepared.

The invention relates to the technical field of corrosion prevention of petroleum pipelines, in particular to anticorrosive paint for petroleum pipelines and a preparation method of the anticorrosive paint. The adhesive is composed of the following components in percentage by weight: 30-45% of modified epoxy resin; 15-25% of a nano composite anticorrosive filler; 0.5-3% of a graphene derivative; 5-12% of silane coupling agent modified mica powder; 20-30% of an environment-friendly mixed solvent; 3-8% of a compound curing agent; 0.5-2% of a thixotropic agent; wherein the nano composite anticorrosive filler is a compound of nano titanium dioxide subjected to surface treatment by a titanate coupling agent and nano montmorillonite, and the mass ratio of the nano titanium dioxide to the nano montmorillonite is 1: (0.8-1.5). The preparation method has the advantages that the dispersion uniformity of the nano filler is improved, the graphene interface bonding force is enhanced, the release accuracy of the corrosion inhibitor is optimized, and the coating is fully crosslinked.

A fuel hose having an inner layer of a thermoplastic elastomer with Graphene or Graphene Derivatives, along with an outer rubber jacket. The outer rubber jacket can include any of a thermoset chlorinated polyethylene elastomer, a chloropolyethylene elastomer, a chlorosulphonated polyethylene, an epichlorohydrin rubber, an ethylene acrylic elastomer or an acrylic rubber material. The inner layer can also include a heat resistant polyamide resin (PA9T material) and a thermoplastic elastomer enhanced with a Graphene or Graphene Derivative. The elastomer material can include any of a thermoplastic vulcanizate, a non-fluorinated elastomer, a fluorocarbon elastomer, a highly saturated nitrile rubber or a nitrile rubber. The outer rubber jacket can include any of a thermoplastic chlorinated polyethylene elastomer, a chloropolyethylene elastomer, a chlorosulphonated polyethylene, an epichlorohydrin rubber, an ethylene acrylic elastomer or an acrylic rubber material.

This invention discloses a method for preparing a nitrogen-sulfur-doped graphene-supported crosslinked starch-based hard carbon material, belonging to the field of electrode material technology. Specifically, it involves using water-soluble starch as the main raw material, then adding soluble glucose with a linear structure for crosslinking, followed by the addition of nitrogen-sulfur additives soluble in deionized water, and simultaneously adding nanoscale graphene material. The graphene material acts as a support to form a conductive network, thus preparing a negative electrode hard carbon material. The graphene material includes graphene and graphene derivatives, which are derived from graphene oxide and derivatizing agents, including 3-aminopropyltrimethoxysilane and / or trimethoxy(2-phenylethyl)silane. A sodium-ion battery is further fabricated from the negative electrode hard carbon material. The negative electrode hard carbon material of this invention exhibits good conductivity, resulting in high reversible capacity, high initial efficiency, and a high slope capacity ratio after being fabricated into a battery.

The invention belongs to the technical field of silicone rubber materials, and particularly relates to a silicone rubber composite material and a preparation method thereof.The preparation method comprises the following steps that graphene-based filler is added into a dispersion-assisting solvent, and dispersion liquid is prepared through ultrasonic dispersion; sequentially adding fumed silica, the dispersion liquid and a vulcanizing agent into raw silicone rubber, and mixing to obtain mixed rubber; curing the rubber compound at room temperature, remilling, and carrying out two-stage vulcanization to prepare the silicone rubber composite material. The graphene-based filler comprises one or two of graphene and a graphene derivative; the auxiliary dispersing solvent comprises one or more of acetone, butanone, cyclohexanone, methyl ethyl ketone, methylbenzene, polyethylene glycol 200 and polyethylene glycol 300. The preparation method is based on solvent-assisted graphene dispersion, the problem that the modification effect of the silicone rubber composite material is poor due to the fact that the graphene-based filler is poor in dispersity is solved, and the obtained silicone rubber composite material has good tear resistance, high damping performance and wide effective damping temperature range.

The present invention provides an electrode formulation comprising a) about 70 wt% to about 90 wt% of a positive active material; b) about 0.1 wt% to about 5 wt% of graphene or graphene derivative; c) about 1 wt% to about 20 wt% of a binder; and d) about 0 wt% to about 10 wt% of a carbon additive other than graphene or graphene derivative; wherein the positive active material and the graphene or graphene derivative form a composite comprising particles of the positive active material each coated with graphene or graphene derivative. The present invention further provides a slurry comprising the electrode formulation, a positive electrode comprising the electrode formulation, a battery comprising the positive electrode, a kit of parts comprising the electrode formulation, and methods of making the electrode formulation and positive electrode disclosed herein.

This invention discloses a method for preparing and applying an ultra-weather-resistant graphene PET coating material, belonging to the field of polymer composite materials technology. The method includes the following steps: S1: dispersing graphene oxide in a solvent, adding a modifier to perform a grafting reaction to obtain a functionalized graphene derivative; S2: performing an esterification reaction between terephthalic acid and ethylene glycol, adding the functionalized graphene derivative obtained in step S1 at the end of the esterification stage or the beginning of the polycondensation stage to disperse it in the polymer matrix; S3: performing a polycondensation reaction under the action of a catalyst, and extruding graphene PET sheets using a single-screw extruder. This invention can significantly improve the dispersibility and compatibility of graphene in a polyester matrix, induce the PET molecular chains to transform from coiled clusters to extended orientation, and reduce internal stress; the resulting material has excellent weather resistance, salt spray corrosion resistance, and a uniform matte appearance, making it particularly suitable for protective coatings on automotive windshield wiper wires.

A fuel hose having an inner layer of a thermoplastic elastomer with Graphene or Graphene Derivatives, along with an outer rubber jacket. The outer rubber jacket can include any of a thermoset chlorinated polyethylene elastomer, a chloropolyethylene elastomer, a chlorosulphonated polyethylene, an epichlorohydrin rubber, an ethylene acrylic elastomer or an acrylic rubber material. The inner layer can also include a heat resistant polyamide resin (PA9T material) and a thermoplastic elastomer enhanced with a Graphene or Graphene Derivative. The elastomer material can include any of a thermoplastic vulcanizate, a non-fluorinated elastomer, a fluorocarbon elastomer, a highly saturated nitrile rubber or a nitrile rubber. The outer rubber jacket can include any of a thermoplastic chlorinated polyethylene elastomer, a chloropolyethylene elastomer, a chlorosulphonated polyethylene, an epichlorohydrin rubber, an ethylene acrylic elastomer or an acrylic rubber material.

The invention discloses a preparation method of a nitrogen-sulfur-doped graphene-supported crosslinked starch-based hard carbon material, belongs to the technical field of electrode materials, and particularly relates to a preparation method of a nitrogen-sulfur-doped graphene-supported crosslinked starch-based hard carbon material by taking water-soluble starch as a main raw material, then adding soluble glucose with a straight-chain structure for crosslinking, then adding a nitrogen-sulfur-containing additive which can be dissolved in deionized water, and finally preparing the nitrogen-sulfur-doped graphene-supported crosslinked starch-based hard carbon material. Meanwhile, a nanoscale graphene material is added, the graphene material plays a supporting role to form a conductive network, the negative electrode hard carbon material is prepared, the graphene material comprises graphene and a graphene derivative, and the graphene derivative is obtained by deriving graphene oxide and a deriving agent; the derivating agent comprises 3-aminopropyl trimethoxy silane and / or trimethoxy (2-phenethyl) silane, and the derivating agent comprises 3-aminopropyl trimethoxy silane and / or trimethoxy (2-phenethyl) silane; the sodium ion battery is further prepared from the negative electrode hard carbon material. The negative electrode hard carbon material disclosed by the invention is good in conductivity, and a battery prepared from the negative electrode hard carbon material is high in reversible capacity, high in first efficiency and high in slope capacity ratio.

The application provides a high-thermal-conductivity and high-elastic-modulus beryllium-aluminum alloy and a preparation method thereof, and belongs to the technical field of alloy manufacturing. The preparation method comprises the following steps: S1, beryllium powder, aluminum powder and graphene derivatives are loaded into a three-dimensional mixer for intermittent mixing to obtain mixed powder; S3, the beryllium-aluminum alloy blank is placed into a vacuum furnace for high-temperature vacuum primary degassing treatment; S4, after the high-temperature vacuum primary degassing treatment, the beryllium-aluminum alloy blank is shaped and then placed into a steel ladle for secondary degassing and vacuum welding sealing; and S5, after the vacuum welding sealing, the beryllium-aluminum alloy blank is placed into a hot isostatic pressing device for hot isostatic pressing treatment, and then the ladle is removed by using nitric acid to obtain the beryllium-aluminum alloy. The beryllium-aluminum alloy has low alloy density, good mechanical properties, high elastic modulus and high thermal conductivity.

A fluid quick connector incorporating graphene or graphene derivatives into engaging male and female end forms that reduces oxygen and water permeation through the coolant quick connector and includes an integrated latch that eliminates the need for a separate latch component. An integrated retainer is located within the mating interior interface of the female end form and opposing exterior interface of the male end form and, in combination with an EPDM O-ring component, provide for a fluid sealing connection between the end forms which reduces permeation of oxygen and water through the body as well as reducing coolant volume loss so as to maintain an ideal (typically 50 / 50) water to glycol ratio.

The invention discloses a high-thermal-conductivity graphene film and a preparation method thereof, and belongs to the technical field of graphene films. The preparation method disclosed by the invention comprises the following steps: adding a graphene oxide dispersion liquid of which the pH value is adjusted into weak graphene oxide slurry to obtain mixed slurry; performing film forming treatment on the mixed slurry, and drying to obtain a raw film; and sequentially carrying out multi-stage heat treatment, graphitization treatment and calendering treatment on the green film to obtain the high-thermal-conductivity graphene film. Weak graphene oxide is adopted as a graphene derivative with a low oxidation degree, a small amount of graphene oxide is added, and PGO is adopted to replace GO, so that oxygen-containing functional groups are fundamentally reduced, the gas production rate during high-temperature treatment and the risk of expansion and fracture of a membrane body are remarkably reduced, and the preparation process is more stable and more suitable for continuous production.

The present application relates to a kind of graphene-based waterborne radiation-cured coating, coating method, metal-based bipolar plate and proton exchange membrane fuel cell, coating ingredients include graphene derivative, waterborne radiation-cured resin, graphene derivative is obtained by graphene oxidation modification, graphene derivative is stably dispersed in waterborne radiation-cured resin, the conductivity of graphene derivative is greater than 200S / cm.The coating is applied to the surface of metal-based bipolar plate by any one method of bar coating method, blade coating method, roll coating method and spraying method, and a graphene-based waterborne radiation-cured coating is formed by stage curing.The present application uses graphene as the main component, uses more environmentally friendly waterborne radiation-cured resin as the organic binder component in coating, brings corrosion protection effect to metal-based bipolar plate while ensuring conductivity, does not add heavy metal ions in coating, and does not use volatile organic solvents, safe and environmentally friendly.

The application discloses a kind of graphene derivative / titanium dioxide composite material, belong to material preparation technical field.The application is: using AC-13 type asphalt mixture, by standard Marshall test determines the best oil stone ratio (OAC) is 4.8~5%, rGO-TiO2 Composite material is incorporated by the way of equal mass instead of mineral powder, incorporation ratio is 2~6%.AC-13 type asphalt mixture is composed of aggregate, asphalt and mineral powder three, the core pollutant of exhaust gas that the asphalt mixture can degrade and its concentration are HC 100~200ppm, CO 0.1~0.3%, NO 50~100ppm, applicable environmental temperature is -40~40 ℃.The asphalt mixture of the application is mixed by the way of rGO-TiO2 Composite material incorporation, can realize the sustained purification effect of automobile exhaust pollutants under different temperature environment, especially under low temperature conditions, it has certain engineering popularization potential to NO and maintain higher degradation rate.

A hydrocarbon scrubber for an evaporative emission control system having an adsorbent composition including a polystyrene-divinylbenzene (PS-DVB) copolymer mixed with a polyurethane foam matrix wherein the scrubber is configured to adsorb fuel vapor bleed during hot-soak or diurnal conditions and maintain low flow restriction. The scrubber material can also be integrated into a vent line connected to a vent port of the canister in the evaporative emissions management system. The adsorbent material can also include a Graphene-derivative sorbent material in either of a polymer foam or extruded honeycomb design pattern specifically adsorptive of vaporized hydrocarbons for preventing bleed emissions while also providing low flow restrictions. The scrubber can include any combination of activated graphene-derivatives, lignocellulose, charcoal, ceramic, binder and flux material.

The application discloses a kind of flame retardant, flame-retardant Lyocell fiber and its preparation method and application.The flame retardant compound of the application has the structure as shown in formula I: Wherein, R1 is selected from-OCH3, -OCH2CH3, -OCH2CH2CH3, R2 is selected from-NHCH2COOH, -NHCH2CH2COOH, complex flame retardant includes the flame-retardant compound and inorganic flame-retardant auxiliary agent;The inorganic flame-retardant auxiliary agent is graphene or graphene derivative.The flame retardant compound of the application contains flame-retardant elements phosphorus and nitrogen, and contains carboxyl structure, can be combined with the hydroxyl on cellulose, can improve the firmness of combination with fiber, and has good flame retardancy, can form complex flame retardant system with inorganic flame-retardant auxiliary agent, is added into fiber spinning dope to prepare flame-retardant Lyocell fiber, and flame-retardant performance is excellent, good durability, while flame-retardant agent is less in amount, need not add emulsifying agent, dispersing agent and other auxiliary agents, and spinning process is green and environment-friendly.