51results about How to "Overcome the disadvantages of easy reunion" patented technology

The invention discloses a nano modified water-base multifunctional sound-absorbing paint and a preparation method thereof. The paint is composed of the following components in parts by weight: 28-38 parts of emulsion, 2-10 parts of pigment, 30-45 parts of filler, 15-25 parts of water, 4-8 parts of flame retardant and 2.25-5.43 parts of assistant. By optimizing the paint system structure, the polymer and filler are selected, modified and proportioned to ensure the basic mechanical properties and sound-absorbing function, and the paint has high-value service properties, such as thermal insulation, moisture resistance, fire resistance, aging resistance, fouling resistance, sterilization, air purification and the like, and is especially suitable for rooms and other occasions with higher environmental requirements.

The invention belongs to the technical field of coating and particularly relates to a thermal insulation coating with excellent thermal insulation performance, water resistant performance, weather fastness and mechanical property and a preparation method thereof. The method comprises the following steps: loading rutile nano-titanium dioxide on the surface of the attapulgite to obtain the titanium dioxide / attapulgite nanocomposite material, organically modifying through a silane coupling agent and carboxylic acid, copdymerizing with styrene and acrylic monomer to prepare the modified styrene-acrylic emulsion, and adding micron titanium dioxide, glass bead, far infrared ceramic powder, a moist disperser, a defoamer, a coalescing agent and water to obtain the thermal insulation coating with excellent thermal insulation performance, water resistant performance, weather fastness and ultraviolet resistance ability.

The invention discloses a magnetic carbon-based iron oxide compound material and a preparation method of the magnetic carbon-based iron oxide compound material. Particularly, the invention discloses a prepraation method of the magnetic carbon-based iron oxide compound material. The preparation method comprises the following steps of: (a) providing a mixture comprising a carbon-based precursor, elemental iron and a solvent; and (b) carrying out heating reaction on the mixture in the step (a), thus obtaining the carbon-based iron oxide compound material. The method has the advantages that materials are common and are easily available, and the process is simple, safe and effective and the like. The obtained compound material has stable magnetism, and is wide in application.

The invention discloses a carbon-based material / polymer composite material and a preparation method thereof. The carbon-based material / polymer composite material comprises at least one flexible polymer layer and at least one conducting layer, wherein the conducting layer is arranged on the flexible polymer layer in a staggered layer mode, and the conducting layer is a carbon-based material / polymer composite material layer or a carbon-based material / polymer composite material layer and an organic conducting polymer layer, the carbon-based material / polymer composite material has good electrical conductivity, in addition, polymer materials are tightly filled between the carbon-based materials, therefore, the connection between the carbon-based materials is stable, the connection between the conducting layer and the polymer material layer is firm and better in the mechanical property, and the carbon-based material / polymer composite material is good in flexibility and capable of being used as a flexible electrode of accumulators such as a capacitor.

The invention relates to a method for preparing a germanium quantum dot doped nano-titanium dioxide composite film through ion beam sputtering. The method comprises the following steps of: cleaning a substrate and a target, placing the substrate and the target into a sputtering chamber, and performing pre-sputtering cleaning on the substrate and the target under vacuum and under protection of argon; performing alternate sputtering on titanium dioxide and the germanium target by argon ion beams with certain projected current and voltage to deposit a titanium dioxide film and a germanium film on the substrate to obtain a germanium-doped nano-titanium dioxide composite film in which the titanium dioxide film is taken as a covering layer; and annealing to obtain the germanium quantum dot doped nano-titanium dioxide composite film. The invention has the advantages that: the method is simple, conditions are mild, the content, scale, morphology and distribution of germanium quantum dots can be freely adjusted in the process, and the disadvantage that the quantum dots are easy to aggregate when prepared by a solution method is overcome so as to adjust the optical absorption characteristics of doped titanium dioxide films.

The invention discloses an aluminum oxide modified multiwalled carbon nanotube nano composite material as well as a preparation method and application thereof. The aluminum oxide modified multiwalled carbon nanotube nano composite material comprises nano aluminum oxide and multiwalled carbon nanotubes, wherein the nano aluminum oxide is loaded on the multiwalled carbon nanotubes to commonly form a net-shaped structure; and the mass percent content of the multiwalled carbon nanotubes in the aluminum oxide modified multiwalled carbon nanotube nano composite material is 40%-50%. The preparation method comprises the following steps: acidifying, loading of aluminum oxide and sintering. The aluminum oxide modified multiwalled carbon nanotube nano composite material has a nano-grade size and has the characteristics that the hydrophily is good, the material is easy to stably disperse in a water solution and a plurality of active radicals exist on the surface, so that the aluminum oxide modified multiwalled carbon nanotube nano composite material has the advantages of large adsorption capacity and high adsorption efficiency; and heavy metal cadmium and an organic matter trichloroethylene in a water body can be efficiently removed.

A preparation method of an iron-coated graphene nanocomposite material comprises the following steps: (1) conducting thermal-expansion stripping on graphite oxide under a high temperature to obtain multi-layer graphene; (2) putting the multi-layer graphene and an organic solvent into a four-mouth flask, and mechanically stirring and mixing uniformly; (3) introducing pentacarbonyl iron steam into the mixed solution for thermal decomposition under a continuously stirring protection atmosphere; (4) conducting the thermal decomposition in a reflux condensation process; and (5) after the reaction,cooling to room temperature under the nitrogen protection, separating a product by a magnet, then cleaning the product by adopting an organic solvent, and drying the product under the nitrogen protection to obtain the iron-coated graphene nanocomposite material. According to the preparation method, Fe nanoparticles with a size of 20-50nm can be coated on the graphene sheet layers uniformly, the process is simple and controllable, the cost is low, and the industrial production is facilitated.

The invention relates to an MnO2-doped composite magnetic nanometer adsorbent, its preparation method and its application. The adsorbent comprises a ferric salt, a ferrous salt, and a divalent manganese salt, wherein the mole ratio of the ferric salt to the ferrous salt to the divalent manganese salt is 2:(0.5-3.0):(0.02-0.6). The adsorbent prepared in the invention has a large specific surface area and a good adsorption performance, and can be used for removing pollutants in sewage, such as arsenic (especially trivalent arsenic), and the adsorbent adsorbing the pollutants can be separated and recovered through a magnetic separation process. The adsorbent has the advantages of simple technology, convenient operation, easy material recovery, and recycle realization.

The invention discloses a method for preparing size-controllable easily-peelable layered nanometer zirconium phosphate. The method comprises the following steps: adding phosphoric acid or metal phosphate into deionized water to prepare a solution with a concentration of 3 to 12 mol / L, then adding a water-soluble inorganic zirconium salt, a surfactant and an intercalator, and carrying out mechanical stirring at a rotating speed of 200 to 500 r / min for 20-30 min so as to realize sufficient dispersion; transferring a mixed solution obtained in the previous step mixture to a hydrothermal reactionkettle and carrying out a reaction at 150-250 DEG C for 3-72 h; after the completion of the reaction, naturally cooling the mixed solution to room temperature; and subjecting a white precipitate to centrifugation, washing with water, and drying successively so as to obtain size-controllable easily-peelable layered nanometer zirconium phosphate. Compared with the prior art, the invention has the following advantages: water is used as a reaction medium, and a fluorine-containing compound is not used; the preparation method is simple in process; and the prepared zirconium phosphate has a controllable size in a range of 100 to 3000 nm, high crystallinity, regular structure, easiness in peeling during processing and good compatibility with polymers.

The invention discloses preparation and application of a cobalt and nitrogen co-doped porous carbon microsphere material. The cobalt and nitrogen co-doped porous carbon microsphere material disclosed by the invention is used for the cathodic oxygen reduction reaction electrocatalyst of a fuel cell. Sodium alginate, cobalt-nitrate hexahydrate and 2-methylimidazole are used as the raw materials of the cobalt and nitrogen co-doped porous carbon microsphere material. The preparation method comprises the steps of: preparing hydrogel microspheres from sodium alginate solution through an electronic injection method, taking cobalt nitrate solution as receiving solution, dipping the microspheres for 12 h, so that sufficient ion exchange of cobalt ions and sodium ions is carried out, freezing and drying after respectively washing by using absolute ethyl alcohol and deionized water for two times, then, putting the microspheres in 2-methylimidazole methanol solution to perform room-temperature reaction for 12 h, then, respectively washing by using absolute ethyl alcohol and deionized water for several times, freezing and drying, and carbonizing through a tube furnace to obtain the cobalt and nitrogen co-doped porous carbon microsphere material. Preparation in the invention is simple in process, green and environment-friendly; and furthermore, the prepared carbon microsphere material has good electro-catalytic property, and has important value and meanings in the field of heteroatom doped carbon-based oxygen reduction electrocatalysts.

The invention provides a preparation method, a product and application of a nitrogen-doped axial carbon fiber / graphene loaded cobalt nano electrocatalyst, cellulose and a nitrogen source are taken asraw materials, a graphene fiber axial composite nitrogen-doped graphene lamellar structure is formed by high-temperature in-situ carbonization, and meanwhile, Co nano particles are loaded to obtain aMott-Schettky heterojunction. The method is simple in process, easy to control, green and safe, and can realize macro preparation. The nitrogen-doped axial carbon fiber / graphene loaded cobalt nano electrocatalyst prepared by the invention has relatively high catalytic activity, and shows relatively high electrocatalytic hydrogen production rate at different scanning rates.

The invention relates to the field of paint and particularly relates to inorganic zinc-rich paint containing modified graphene and a preparation method of the inorganic zinc-rich paint. The paint is prepared from the following three components in parts by weight: A: 40-50 parts of ethyl silicate and 0.5-1.0 parts of modified graphene; B: 5-10 parts of polyvinyl butyral and 0.2-0.5 parts of a silane coupling agent; and C: 40-55 parts of zinc powder, wherein the modified grapheme refers to modified grapheme which can be stably dispersed in alcohol and silicate ester. The modified graphene adopted in the paint can be uniformly and stably dispersed in an alcoholic solvent without addition of a surfactant, and the defect that the graphene is easily agglomerated in an inorganic medium is overcome, so that the modified graphene can be uniformly dispersed in the inorganic zinc-rich paint, the electrical conductivity of the paint is improved, the water insulation effect of the paint is enhanced, and then the corrosion resistance of the paint is remarkably improved.

The invention discloses a sulfur-doped nano ferroferric oxide / biochar composite material, a preparation method thereof and application thereof in remediation of heavy metal arsenic and / or lead contaminated soil. The composite material is prepared by loading sulfur-doped nano ferroferric oxide on a biochar carrier, and biomass raw materials used for preparing the biochar carrier comprise agricultural waste. In the preparation process of the sulfur-doped nano ferroferric oxide / biochar composite material, solid loading and vulcanization modification are combined at the same time, so that the composite material has an efficient adsorption performance, reduction performance and recovery potential, and the purpose of efficiently removing arsenic and lead pollutants in soil at the same time can be achieved. According to the method, the limitation of solely using biochar or a nano-iron material is broken, the problem that arsenic existing in an anionic form and lead existing in a cationic formare difficult to remove efficiently at the same time in the actual soil remediation process is solved, and the composite material has wide application prospects.

The invention discloses a metal oxide / graphitic carbon nitride composite material having a three-dimensional structure, and a preparation method and application thereof. The composite material is prepared by compounding g-C3N4 nanosheets and metal oxides, wherein the mass percent of the g-C3N4 nanosheets is 1-25%.The composite material obtained by the invention is prepared by taking a carbon nitride material having a graphene-like two-dimensional structure after peeling as a template, adding metal oxide precursor and stabilizer, and reacting in a high-pressure reaction kettle under the condition of stirring. Compared with a pure metal oxide, the specific surface area of the composite material is obviously increased; and the defect of the metal oxide such as high agglomeration possibility is overcome, so that the adsorption capacity is greatly improved. Thus, the composite material has favorable application prospects in the aspects of removing sulfides in diesel and the like.

The invention relates to porous dodecahedral ZnO and application thereof as a lecithin adsorption material. The porous dodecahedral ZnO can be used as the lecithin adsorption material for selectivelyadsorbing and enriching lecithin by characteristic Lewis acid-base reaction in combination with the advantages of a nanomaterial and a metal-organic framework material, and the adsorption efficiency can reach 80 percent.

The invention provides a graphene epoxy compound material for an electric automobile driving module and a preparation method. The compound material disclosed by the invention is formed by compoundinggraphene / inorganic powder particle hybrid materials with epoxy resin; the graphene / inorganic powder particle hybrid materials as filler are uniformly dispersed into a basal body of the epoxy resin. Byadopting the graphene / inorganic powder particle hybrid materials as the epoxy resin filler, the advantages of excellent performance such as high graphene strength and good heat conduction performanceof graphene as well as high heat conductivity, low expansion coefficient, high filling property, low stress and the like of inorganic powder particles can be fully developed, the defect of easiness for aggregation of the graphene / inorganic powder particle hybrid materials and the epoxy resin is overcome, enhancement and toughening effects can be achieved, and the application performance of the resin is improved. The compound material prepared by adopting the technical scheme has the special performance such as high heat conductivity, high adhesion strength, small change of curing volume, strong weathering resistance, high temperature resistance, small heat expansion coefficients and the like, and is very suitable for being used as an epoxy material for encapsulation in an overall encapsulation technology of a new-energy automobile motor driving module.

The invention provides a preparation method of a micro-extraction / micro electrode bifunctional probe and belongs to the field of biological signal molecule detection. In the micro-extraction / micro electrode bifunctional probe, a carbon nanofiber (CNFs) / carbon fiber (CF) has high adsorption activity, and micro-extraction and micro electrodes are integrated. As magnetic nanoparticles Fe3O4 are modified on the surface of CNFs, not only is the defect that the magnetic nanoparticles Fe3O4 are liable to aggregate overcome, but also the magnetic response property of the CF is improved. By regulatingand controlling movement routes of Fe3O4 / CNFs / CF through magnetic fields, magnetic navigation is achieved, and through electrochemical signal variations of Fe3O4 / CNFs / CF, precise positioning of signalmolecule release sites is achieved; due to bidirectional regulation and control of magnetic fields and electric signals, a novel detection method for cell signal molecule positioning quantitative analysis is provided, and essential theoretic instructions can be provided to design novel efficient cell analyzers later.

The invention belongs to the field of material preparation and environment, and particularly relates to a metal-loaded covalent organic framework composite material, and a preparation method and application thereof. The composite material is prepared from the following components: metal nanoparticles and TpMA. The preparation method comprises the following steps: mixing TpMA, chloroauric acid and methanol; and then adding sodium borohydride, and reacting to obtain the product. The metal nanoparticle loaded covalent organic framework material prepared by the invention is a novel heterogeneous catalyst which is simple to prepare, green and efficient, has high catalytic activity, high degradation rate and short time, and can catalytically reduce high-concentration pollutants.

The invention discloses an aluminum oxide-loaded iron-manganese oxide composite material as well as a preparation method and application thereof. The preparation method comprises the following steps:taking aluminum oxide as a carrier, firstly mixing a FeSO4 solution with Al2O3, then dropwise adding a KMnO4 solution into a reaction system, reacting the obtained turbid liquid at room temperature, and performing standing, centrifuging, washing and drying to obtain the Fe-Mn@Al2O3 composite material. The composite material effectively inhibits agglomeration of iron-manganese oxide particles, realizes a synergistic effect of iron-manganese oxide and Al2O3, improves the treatment effect on antimony in a water body, effectively reduces the toxicity of antimony, and reduces the preparation cost of the material. In addition, the composite material has very good acid resistance and alkali resistance, can rapidly achieve solid-liquid separation through gravity settling, and has wide applicationprospects in environmental remediation, especially in the field of water treatment.

The invention provides an anaerobic granular sludge loaded vulcanized nano zero-valent iron adsorbing material which is obtained by taking anaerobic granular sludge as a base material, ferrous sulfateas an iron source, sodium borohydride as a reducing agent and sodium hydrosulfite as a vulcanizing agent through a composite reaction. The form of the material is that vulcanized nano zero-valent iron is loaded on the surface of anaerobic granular sludge. The adsorption performance of the adsorption material on heavy metal ions or semimetal ions is remarkably improved, and the adsorption materialcan be used for adsorbing the heavy metal ions or semimetal ions in wastewater, so that the pollution problem of the heavy metal ions and semimetal ions in the wastewater is solved, and the problemsof disposal of residual anaerobic granular sludge discharged from an anaerobic reactor and easy loss and easy agglomeration of vulcanized nano zero-valent iron as a single adsorption material can be solved at the same time.

The invention discloses a cable sheath containing mica powder compound multiwalled carbon nanotube. The cable sheath is prepared from the raw material in parts by weight: 35 to 45 parts of a main material, 0.5 to 1.2 parts of organic peroxide crosslinking agent, 1 to 2 parts of isopropyl tri (dioctylpyrophosphato) titanate, 2 to 4 parts of ammonium polyphosphate, 3 to 5 parts of epoxidized soybean oil, 2 to 4 parts of ethylene bis stearamide, 1 to 2 parts of zinc stearate, 30 to 50 parts of mica powder compound multiwalled carbon nanotube, 5 to 15 parts of jute fiber, 4 to 10 parts of nano bentonite, 2 to 8 parts of zeolite powder, 1 to 2 parts of antioxidant 1010 and 1 to 4 parts of anti-ageing agent 4010. The cable sheath disclosed by the invention has corrosion resistance, good thermal stability, traction resistance, tear resistance and very good mechanical property.

The invention discloses an aluminum oxide modified multiwalled carbon nanotube nano composite material as well as a preparation method and application thereof. The aluminum oxide modified multiwalled carbon nanotube nano composite material comprises nano aluminum oxide and multiwalled carbon nanotubes, wherein the nano aluminum oxide is loaded on the multiwalled carbon nanotubes to commonly form a net-shaped structure; and the mass percent content of the multiwalled carbon nanotubes in the aluminum oxide modified multiwalled carbon nanotube nano composite material is 40%-50%. The preparation method comprises the following steps: acidifying, loading of aluminum oxide and sintering. The aluminum oxide modified multiwalled carbon nanotube nano composite material has a nano-grade size and has the characteristics that the hydrophily is good, the material is easy to stably disperse in a water solution and a plurality of active radicals exist on the surface, so that the aluminum oxide modified multiwalled carbon nanotube nano composite material has the advantages of large adsorption capacity and high adsorption efficiency; and heavy metal cadmium and an organic matter trichloroethylene in a water body can be efficiently removed.

The embodiment of the invention discloses a nano-zinc oxide modified composite plate and a preparation process of the nano-zinc oxide modified composite plate. The tensile strength and the impact strength of polyvinyl chloride sheets in practical application can be effectively improved, the surface smoothness of the sheets is improved, and the heat stability and anti-aging performance of the sheets can be increased. In the embodiment of the invention, the nano-zinc oxide modified composite plate is formed by compounding three layers including a PMMA layer, a nano-zinc oxide modified layer and a PMMA layer from top to bottom respectively, wherein a nano-zinc oxide modified layer contains nano-zinc oxide and polyvinyl chloride. The nano-zinc oxide modified composite plate is high in tensile strength, high in impact strength, high in smooth finish, high in heat stability and high in aging resistance.

The invention relates to the technical field of magnetic ink and provides a method for improving the dispersibility of nano ferrite in magnetic ink. The method comprises the following steps of performing hydroxylation modification on the nano ferrite through a hydrothermal reaction at first; then, performing fatty acid modification on a micron graphite sheet, loading the hydroxyl-modified nano ferrite on the surface of the fatty acid-modified micron graphite sheet by utilizing the reaction of hydroxyl and carboxyl under the action of a magnetic field, preparing a ferrite material loaded on thegraphite sheet, and using the obtained composite material as a magnetic pigment to be added into the ink. In this way, the purposes of improving the compatibility between the ferrite and an organic connecting material, improving the dispersibility of the nano ferrite and reducing agglomeration can be achieved.

The invention relates to preparation of a core-shell ultraviolet fluorescence molecularly-imprinted material and application of the material in sulfanilamide detection. By using sulfamethyldiazine as a template molecule, the synthesized lysine-based fluorescence molecule as the functional monomer, ethylene glycol dimethyl acrylate as a crosslinking agent and azodiisobutyronitrile as an initiator, the lysine-framework fluorescence functional monomer with FMOC fluorophore is subjected to surface polymerization to obtain an about 10nm imprinted layer on the monodisperse methylacryloylated silicon ball surface with the diameter of 100nm. A Soxhlet method is utilized to remove the imprinted template molecule in the material to obtain the fluorescence molecularly-imprinted sensing material with fluorescence quenching responsiveness to the template molecule; the molecularly-imprinted material has the advantages of favorable dispersity, high response speed and stable optical properties, and is applicable to determining the sulfamethyldiazine content in the marked milk; and the method can indirectly convert the ultraviolet absorption signal of the analyte into a sensitive fluorescence signal, thereby enhancing the detection sensitivity and obtaining favorable recovery rate.

The invention discloses a method for preparing silicon quantum dots in nano titanium dioxide under the assistance of ion implantation and ion bean sputtering. The method comprises the following steps: washing a substrate and a target material and then placing in a sputtering chamber; carrying out pre-sputtering and washing in vacuum under the protective condition of argon; sputtering titanium dioxide with an argon ion beam with certain projected current and voltage, and thus depositing a titanium dioxide film on the substrate; annealing so as to obtain a nano titanium dioxide film; carrying out silicon ion implantation three times at certain energy and implantation dosage so as to obtain silicon doped titanium dioxide film; and annealing so as to obtain the silicon quantum dot doped nano titanium dioxide film. The method has the advantages that method is simple, and conditions are mild; the content, size, morphology and distribution of the silicon quantum dots can be freely regulated through regulating an ion implantation process; and the defect that the quantum dots are easy to agglomerate when in implantation is overcome, thereby regulating the light absorbing characteristic of the doped titanium dioxide film.

The invention belongs to the technical field of environmental functional materials and soil treatment, and discloses an application of a magnesium-aluminum double-metal hydroxide loaded ferrous sulfide composite material in soil remediation. The influence of the composite material dosage and the reaction time on the soil mercury remediation effect is studied, and the change of the mercury existence form in the soil before and after material treatment is studied; and the influence of the application of the composite material on soil properties is studied. The use amount and reaction time of the composite material required for enabling the leaching concentration of mercury in the soil to reach the III-class standard of the groundwater environmental quality standard (GB / T 14848-2017) are determined, the stabilized mercury has long-term stability, the environmental risk of mercury in the soil is remarkably reduced by adding the composite material, the pH value and microbiological indexes of the soil are effectively improved, and the cyclic regeneration capability of the soil ecological environment is promoted. The remediation technology is simple to operate, short in reaction time and capable of persistently and efficiently stabilizing mercury, and has a wide application prospect in environmental remediation.