87results about How to "Overcome reunion" patented technology

The invention discloses a preparing method for a corrosion-resistant gas diffusion layer of a fuel cell. The gas diffusion layer is composed of a micropore layer and a supporting layer. The preparing method includes the following steps: metallic oxide nano-powder is added into a dispersing-agent-containing aqueous solution, and stirring and ultrasonic dispersion are carried out till even suspension liquid is formed; then water repellent emulsion is added, and stirring is carried out till micropore layer slurry is formed; one side of the supporting layer is evenly coated with the micropore layer slurry, and low-concentration water repellent emulsion is sprayed to the other side of the supporting layer; the object is dried and placed into a nitrogen-charged dryer to be sintered, and the gas diffusion layer is obtained. By means of the gas diffusion layer obtained with the preparing method, it is effectively guaranteed that conductive materials and hydrophobic materials in the micropore layer slurry are evenly dispersed, the gas diffusion layer has the proper hydrophilic performance and the proper hydrophobic performance accordingly, the corrosion resistance and the stability of the gas diffusion layer are improved, and cost is reduced.

A preparation method of carbon fiber reinforced inorganic polymer composite relates to a preparation method of inorganic polymer composite. The method solves following problems: low mechanical strength, low ductility, low bearing capacity, low application reliability of the inorganic polymer composite; large aspect ratio, easiness to be winded and agglomerated even be fractured during the preparation process, uneven distribution in an inorganic polymer composite matrix and low strengthening effect of existing carbon fiber. The preparation method of the invention is: firstly, to prepare batch of the inorganic polymer and regulate the viscosity of the batch through deionized water; secondly, to prepare chopped carbon fiber prefabrication; thirdly, to prepare a composite green body which includes a plurality of carbon fiber prefabrication layers; fourthly, to add vacuum pressure on the green body and dry the green body to produce the carbon fiber reinforced inorganic polymer composite. The invention overcomes the carbon fiber agglomeration and fracture problems of a conventional strong agitation method. The composite prepared through the invention has the advantages of high carbon fiber content, even distribution, high material strength and good ductility.

The invention discloses a preparation method of a high-throughput graphene oxide-cellulose acetate composite membrane which is prepared with an immersion precipitation phase inversion process. A casting membrane solution comprises components in mass of the casting membrane solution respectively of 15%-30% of cellulose acetate, 0.0001%-0.01% of graphene oxide, 10%-35% of formamide and 35%-70% of acetone. Single layer graphene oxide has the advantages of large specific surface area and high absorbability, the micro-structure of the membrane can be finely adjusted, and the membrane performance is improved. The prepared high-throughput graphene oxide-cellulose acetate composite membrane has a great application value and potential. Experiments prove that compared with a pure cellulose acetate membrane, the throughput of the high-throughput graphene oxide-cellulose acetate composite membrane is improved by 220%, the operating pressure can be reduced greatly, energy consumption is saved, and the high-throughput graphene oxide-cellulose acetate composite membrane has a better application in the fields of heavy-metal ion removal, industrial waste water treatment and seawater desalination and the like.

The invention discloses a preparation method of a three-dimensional graphene-based nano zero-valent iron material. The preparation method comprises the following steps: step 1, preparing a three-dimensional graphene aerogel; step 2, loading nano zero-valent iron, wherein 2.1, mixing the three-dimensional graphene aerogel with a ferrous or ferric iron solution under nitrogen gas condition to obtaina mixed solution A, controlling the mass ratio of three-dimensional graphene to iron to be 1: 1-1: 10; 2.2, adding sodium borohydride into the mixed solution A, reacting for 20-40 min, and carrying out suction filtration to obtain a product B, and controlling the molar ratio of iron to sodium borohydride to be 1: 1-1: 10; 2.3, subjecting the product B to washing with absolute ethyl alcohol and freeze drying for 12-36h to obtain the three-dimensional graphene-based nano zero-valent iron material. Compared with a previous one-step hydrothermal synthesis method, the method has the advantages that the reaction conditions are milder, and the prepared three-dimensional graphene-based nano zero-valent iron material is controllable in morphology, high in iron loading capacity, easy to recycle after being used, free of secondary pollution, simple, economical and high in operability.

The invention relates to an MOF (metal organic framework)-derived carbon-based photonic crystal-porphyrin-containing COFs (covalent organic frameworks) composite material as well as a preparation method and the application thereof. The composite material is obtained by performing reaction on an MOF-derived carbon-based photonic crystal, tetraniline porphyrin and terephthalaldehyde. The composite material has high adsorption capability and adsorption capacity on carbon dioxide.

The invention relates to a hydrophilic modification method of a high-flux PVDF porous membrane. The method comprises the following steps that PVDF powders, tannic acid and PVP are used as raw materials, firstly the PVDF porous membrane is prepared by adopting a phase inversion method, a metal ion solution is used as coagulation bath, by means of the strong complexing capacity of tannic acid with metal ions, a relatively stable molecular chain interpenetrating network structure is formed on the surface of the membrane and inside the membrane, thereby effectively complexing with tannic acid containing a plurality of hydrophilic groups, and the tannic acid has good complexation with PVP, so that more PVP is fixed, and finally a composite hydrophilic channel of tannic acid-PVP-metal ion is formed inside the membrane, so that a PVDF modified membrane with high flux and better hydrophilicity is prepared. The preparation method has the advantages of being wide in raw material source, low in preparation cost and simple in processing technology, and being beneficial for bulk production and marketization application and popularization, and meeting green environmental protection requirements.

The invention provides a carbon nano-tube-silicon dioxide gel glass preparation technology. On the basis of adopting three steps of carboxylic acidification, acyl chlorination and amidation for the surface modification of CNTs and realizing the covalent bonding of CNTs and APTES, the technology adopts a sol-gel process and introduces the sol-gel process into the silicon dioxide gel glass. During a hydrolysis-polycondensation process, TEOS, GPTMS and CNTs-APTES of precursor are hydrolyzed respectively and form into a silicon dioxide three-dimensional network structure through the polycondensation. And CNTs is chemically bonded into the silicon dioxide network by means of APTES. The even distribution in silicon dioxide gel glass matrix is realized. An agglomeration problem of the carbon nano-tube in the matrix is solved fundamentally. And the application background of the carbon nano-tube is further developed.

The invention discloses a cadmium-contaminated farmland soil remediation method based on magnetic biochar. The method mainly comprises the following steps: irrigating soil, adding biochar accounting for 0.5-5% of the mass of the soil, performing sufficient stirring until uniformity to make the magnetic biochar and the soil form a muddy water mixture, standing the mixture, adding water, performingstirring to make the magnetic biochar float out of the water surface, and recovering the magnetic biochar enriched with free Cd and soil clay particles so as to achieve the purpose of reducing the total Cd of the soil. The free Cd and clay particles with a small particle size (smaller than or equal to 2 [mu]m) and a high Cd concentration are enriched by means of the magnetism, floatability and other properties of the magnetic biochar, so the Cd content of the soil is reduced; and the application of the magnetic biochar also has an improvement effect on soil. The magnetic biochar prepared in the invention has floating capacity, and can be magnetically recycled, and the remediation method has the advantages of simple flow, high operability, greenness and environmental friendliness, and is anenvironmentally-friendly remediation technology.

The invention relates to a preparation method of redispersible latex powder, which comprises the following steps: (1) preparing a cation emulsion; (2) adding an inorganic substance precursor into the cation emulsion for a sol-gel reaction so as to prepare a composite emulsion with an inorganically-coated polymer core shell particle structure; (3) performing spray drying of the composite emulsion to obtain the latex powder. The inorganic coating external layer of particles in the composite emulsion has a high melting point or softening point, can prevent contact and fusion of internal particle polymer cores of the redispersible latex powder during the high temperature spray drying process, and prevent adhesion and caking between the redispersible latex powder, and adherence to the inner wall of the spray drying device. The dried redispersible latex powder has excellent fluidity, redispersibility, and redispersion colloid stability of corresponding aqueous dispersion.

The invention relates to a method for producing quick crystalline polylactide compound material by nano nucleating agent in situ belonging to the compound material field. The inventive method has the lactide or lactide as material, mixes the nano nucleating agent for a hot melting polycondensation to get polylactide/nano nucleating agent compound material. The crystal speed of the compound material is increased relative to the pure polylactide material. The method has a simple craft, a low cost, and gets the compound material with a good processing performance, mechanical property and a completely biodegradation which is applied in many fields.

The invention discloses a preparation method for nanometer metal oxide ceramic thin or thick coating, comprising steps in sequence: first, a mixed solution with metallic cation, organic monomers, cross-bonding agents, and initiating agents is prepared; second, gelatin is catalyzed; third, sizing agent is prepared for coating; fourth, coating is carried out; fifth, heat treatment is carried out. By adopting the cheap inorganic salts as raw materials, the nanometer metal oxide ceramic thin or thick coating has the advantages of simple technical process, easy operation, high efficiency, excellent repeatability, easy control for the size of the metal oxide grain and the thickness of the coating by adjusting the technological parameters, effectively avoiding mutual contact and agglomeration of the grains, meanwhile overcoming the shortcomings of high requirements upon experimental facilities and high cost in the common film preparing technique, thus providing with excellent universality and commonality, and also applicable to the preparation of the multi-layer composite nano-metal oxide thin or thick ceramic coating. In addition, the prepared thin or thick coating has a net-type loose porous structure, and the crystallization is excellent. The crystallized grains with narrowly distributed sizes are in sphere or sphere-like shapes, and are particularly suitable for the preparation of gas or humidity sensors.

A nano-class coated membrane for cleaning air and generating negative ions carries the TiO2 nanoparticles for generating electrons and holes in photocatalytic condition to trigger redox reaction which can decompose the harmful gas (formaldehyde) into CO2 and H2O and the polar ore nanoparticles for generating electric current under thermal excitation of pressure and temp to electrolyze the H2O and release negative ions.

The invention relates to a porous membrane made of polytetrafluoroethylene hollow fibers, a preparation method and an application thereof in membrane contractor. A silica precursor carries out in-situ reactions in a polytetrafluoroethylene spinning solution to generate silica nano particles, and then a silane coupling agent is added into the solution to evenly disperse the silica nano particles so as to obtain the pore-forming agent used in the film-forming process of hollow fiber membrane. The wires for spinning membranes are subjected to a series of treatments such as proper drying, sintering, stretching, extracting, and washing so as to obtain hydrophobic polytetrafluoroethylene hollow membranes with a certain micro-porous structure. The porous membrane made of polytetrafluoroethylene hollow fibers has a very good application prospect in the field of membrane contactor.

The invention relates to a carbon-coated Na0.55 Mn2O4.1.5H2O nanocomposite and a preparation method thereof. Na0.55 Mn2O4.1.5H2O has a spherical structure formed by nanorods and is evenly wrapped by an amorphous carbon layer. The preparation method comprises the steps of (1) treating manganese dioxide nanorods by acid to modify the surfaces of the manganese dioxide nanorods, then adding tetraethyl orthosilicate (TEOS) into alcoholic solution of the manganese dioxide nanorods, and hydrolyzing to obtain silica-coated manganese dioxide core-shell structure composite material; (2) enabling the sample obtained in the step (1) to be coated with carbon to obtain carbonized composite material; (3) slowly adding the carbonized composite material powder sample into excess hot sodium hydroxide solution, and stirring for reaction. The carbon-coated Na0.55 Mn2O4.1.5H2O nanocomposite has high specific capacity as well as excellent rate performance and cycle performance, thus having wide application prospect in the technical fields of lithium ion battery electrode materials and other electrochemical techniques.

The invention relates to a preparation method of Zn4Sb3 powder that is evenly coated with nano Cu. The method is characterized in that: the mixture of highly pure metal Zn powder and Sb powder is firstly smelted under vacuum, condensed and crystallized to obtain the casting body of a single-phase beta-Zn4Sb3 compound, the casting body is ground and sieved to obtain beta-Zn4Sb3 powder, to which surface processing is carried out; then an acid and alkali regulator is used for regulating pH value to obtain activating beta-Zn4Sb3 powder; then the activating beta-Zn4Sb3 powder is used as a parent stock and water soluble cupric salt is used as a Cu source to form the Zn4Sb3 powder that is evenly coated with the nano Cu by liquid phase reduction reaction, electroless plating process and organic protection treatment. The preparation method is characterized by low cost, simple operation, even coating of the nano Cu and environmental protection, etc. The powder not only can keep the thermoelectric transmission properties of the beta-Zn4Sb3 compound, but also has improved phonon scattering effect and electron energy filtering effect electron energy for being evenly coated by nano second phase.

The invention belongs to the filed of cosmetics and particularly relates to a sunscreen moisturizing lotion and a preparing method and application thereof. The sunscreen moisturizing lotion is prepared from nanometer titanium dioxide-carboxymethyl chitosan composite microspheres, peach blossom extract, honeysuckle flower extract, cyclomethicone, isononyl isononanoate, glycerol, panthenol, niacinamide, cetyl alcohol, xanthan gum, methl glucse sesquistearate, glyceryl stearate, fragrance and water. According to the sunscreen moisturizing lotion and the preparing method and application thereof, the sunscreen effect of nanometer titanium dioxide and the good moisture absorbing, moisture retaining, skin moisturizing and other effects of chitosan are combined, and the problems that in a traditional sunscreen agent, nanometer titanium dioxide is likely to cluster, large in dosage and the like are solved; besides, through combination of nanometer titanium dioxide and chitosan, good synergic antibacterial and antiseptic effects are achieved, and a higher promoting effect on the stability and durability of the sunscreen moisturizing lotion is achieved. In addition, the sunscreen moisturizing lotion can absorb ultraviolet light in all wavebands at high efficiency as peach blossom extract and honeysuckle extract are included and are in scientific proportion with other components.

The invention relates to a cinobufagin dry power inhaler, in particular to a dry power inhaler made of cinobufagin, a preparation method of the dry power inhaler and application of the dry power inhaler in preparation of drugs for treating tumors of lung. The cinobufagin dry power inhaler is characterized by consisting of the cinobufagin and medically acceptable auxiliary materials, and the mass ratio of the cinobufagin to the medically acceptable auxiliary materials is 1: 0.03 - 1:110. The cinobufagin is prepared to be the dry powder inhaler, therefore, the cinobufagin can be directly acted on pulmonary lesions, the happening of adverse actions is reduced, the bioavailability of the drug is enhanced, the defects of oral formulation including slow effect, liver first-pass effect to liver,low bioavailability and the like are overcome, and synchronously the problems of injection including inconvenience for use, bad compliance of patients and the like are also solved.

The invention discloses a Cu/SiO2 catalyst. A preparation method for the Cu/SiO2 catalyst comprises: by taking SiO2 as a carrier, loading an active component copper, wherein the loading capacity of copper is 10-40wt%; preparing a copper ammine solution through precusor salt of copper and ammonia water; then adding polyethylene glycol; then adding the SiO2 carrier, stirring, drying, roasting and reducing the mixture to prepare the Cu/SiO2 catalyst with high dispersity and high activity; and catalyzing dimethyl maleate for one-step hydrogenation to efficiently synthesizing tetrahydrofuran by using the Cu/SiO2 catalyst. The Cu/SiO2 catalyst disclosed by the invention has the advantages of being high in raw material conversion rate and good in target product selectivity.

A preparation method of antistatic copolyester comprises the following steps: mixing and grinding fluoride modified lithium manganate, lithium iron phosphate nano-powder, sodium germinate, sodium-based bentonite, ethylene glycol, p-hydroxybenzoic acid and butylene glycol to prepare modified ethylene glycol I; mixing and grinding silane coupling agent modified tin oxide whiskers, conductive potassium titanate whiskers, polyethylene glycol, sodium 5-sulfobis(hydroxyethyl)isophthalate, antimony ethylene glycalate, an antioxidant and ethylene glycol to prepare modified ethylene glycol II; blending and beating the modified ethylene glycol I, ethylene glycol and terephthalic acid, carrying out an esterification reaction, adding the modified ethylene glycol II in the normal pressure esterification-condensation polymerization stage, and further carrying out condensation polymerization to prepare the antistatic copolyester. The modified polyester can obviously improve the antistatic property, the hygroscopic property and other performances of a polyester material, enhances the mechanical performances of the polyester material, and can be widely applied to production of polyester fibers, plastics and films.

The invention discloses a method for preparing a double-component and double-layer nano lubrication thin film by taking a nano-particle array as a template. The double-component and double-layer nano lubrication thin film is prepared on the surface of hydroxylated monocrystalline silicon by taking the nano-particle array as the template according to a liquid phase method and a gas phase method; and components of the double-component and double-layer nano lubrication thin film can be controlled according to the concentration of a nano-particle solution or a lifting speed. The prepared double-layer nano film consists of a self-assembly film formed on the surface of the monocrystalline silicon by bonding alkyl carboxylic acid with high lubrication performance and perfluorocarboxylic acid through a chemical key so as to be integrated with the dual advantages of the long service life of the alkyl carboxylic acid and the surface antisticking performance of the perfluorocarboxylic acid; therefore, the obtained double-component and double-layer nano lubrication thin film has relatively high friction performance and high lubrication; the bearing capacity, the antisticking performance and the anti-abrasion performance of the single self-assembly single-molecule film are improved greatly; and the application of the self-assembly single-molecule film is expanded.

The invention discloses an environment-friendly composite floor capable of absorbing formaldehyde, and belongs to the technical field of composite floors. The composite floor is compounded by multiple layers of wood veneers; adhesive layers are arranged between the wood veneers; the wood veneers are dipped by formaldehyde absorbing material dispersing liquid; and the formaldehyde absorbing material dispersing liquid comprises the following components in percentage by mass: 10-30% of ultrafine diatomite powder, 5-20% of ethylene urea, 5-10% of microcrystalline cellulose, 2-10% of ZnO/nanometer TiO2 composite material, 1-3% of sodium tripolyphosphate, and the balance of water. The environment-friendly composite floor cannot pollute indoor environment, and facilitates the health of people. The formaldehyde absorbing material is reasonable in formula design, is simple and feasible in preparation method, is excellent in free formaldehyde removing effect, reaches 99.5% of formaldehyde removing rate, and is broader in application prospect. The adhesive product selected in the composite floor is high in additional value, high in binding strength and better in mildew resistance.

A method for preparation of yttrium aluminium garnet relates to a preparation technology for fluorescent powder, especially to a preparation technology for yttrium aluminium garnet activated by europium, which provides a method for preparation of yttrium aluminium garnet which adopts macromolecular network gelatinization, does not need to mill, without birdnesting or small birdnesting, can be directly used in packing and can exert its optical performance with a high limit, and is no environmental contamination and can save the cost. The method consists of adding aluminum nitrate, citric acid, yttrium nitrate and europium nitrate into a container, adding deionized water, adjusting pH value to neutral with ammonial solution,with a thermostatic bath, adding acrylamide and N,N- methylene biacrylamide, having a thermostatic bath until acrylamide and N,N- methylene biacrylamide dissolve, adding tetraethylethylene diamine and hydrogen dioxide solution to initiate the polymerization, obtaining the YAG macromolecular network gel by a thermostatic bath, then removing the moisture and the organic matter by heat treatment, by heat decomposition, decomposing concentrated nitric acid to corresponding oxidate,obtaining the powders by pre-calcination, then by high-temperature heat treatment, performing degree of crystallization to obtain YAG powders.

The invention relates to a production method of a modified PVDF ultrafilter membrane, and concretely relates to a production method of a nano-silver/silica core-shell doped PVDF ultrafilter membrane. The purpose of the invention is to solve the problems of easiness in agglomeration of nano-silver the membrane, fast release rate in the membrane filtering process and unobvious anti-pollution performance enhancing effect on the PVDF ultrafilter membrane of present silver doped PVDF ultrafilter membranes. The method comprises the following steps: 1, preparing a PVDF solution; 2, preparing a nano-silver/silica core-shell particle-containing mixed solution; 3, preparing a casting solution; and 4, carrying out curtain coating to form a membrane in order to obtain the nano-silver/silica core-shell doped PVDF ultrafilter membrane. The pure water flux of the in-situ synthesized nano-silver/silica core-shell doped PVDF ultrafilter membrane produced in the invention is 120-250 L/m<2>.h. The production method of the nano-silver/silica core-shell doped PVDF ultrafilter membrane is obtained in the invention.

The invention discloses a preparation method of an antimony tin oxide water/oil amphiprotic slurry, which comprises the following steps: 1) preparing a nano antimony tin oxide powder suspension from nano antimony tin oxide powder and an amphiprotic solvent, adding a surface charge regulator until the pH value is 9-11, and carrying out high-speed dispersion for 6-8 hours with a high-speed shearing dispersion machine to obtain a dispersion solution, wherein the amphiprotic solvent is ethylene glycol monomethyl ether or glycol ether; and 2) adding a surface dispersing agent into the dispersion solution obtained in the step 1), and carrying out high-speed dispersion for 2-4 hours with a high-speed shearing dispersion machine to obtain the nano antimony tin oxide water/oil amphiprotic slurry. The nano antimony tin oxide (ATO) water/oil amphiprotic slurry prepared by the method can be compounded with both a hydrophilic resin and a lipophilic resin, thereby widening the application range of the ATO slurry.

A nano-flow battery, relating to an electrochemical source, which provides a nano-flow battery that is different from the traditional flow electrode of the solid electrode and directly uses the nano-material as the active substance, wherein the nano-flow battery is provided with an anode collector, a nano-anode fluid, an isolation membrane, a nano-cathode fluid and a cathode collector, wherein the anode collector, the nano-anode fluid, the isolation membrane, the nano-cathode fluid and the cathode collector are in turn assembled. Said isolation membrane is arranged between the nano-anode fluid and the nano-cathode fluid. The nano-anode fluid is composed of an anode nano-active granule, an anode conductor, an anode electrolyte solution and an anode additive. The nano-cathode fluid is composed of a cathode nano-active granule, a cathode conductor, a cathode electrolyte solution and a cathode additive.

The invention provides a cast stone containing lubricating oil and a preparation method of the cast stone. The cast stone containing lubricating oil is prepared from the following ingredients: mineralbase oil, a cast stone, modified zirconite, dimethyl succinate, nonylphenol polyoxyethylene ether, polyvinyl alcohol, methyl carbamate, borate, triethylamine oleate, a friction additive and a surfactant. The prepared lubricating oil is excellent in abrasion resistance, rust resistance, heat stability, anti-foaming property, sealing adaptability and is higher in cleanliness, the requirement of high-strength mechanical equipment on the lubricating oil is met, the adhesive force of the lubricating oil is stronger, the oil is not easily lost rapidly, the preparation method is simple, the industrial production of the lubricating oil is convenient, the cost is low, the defect of poor oxidation stability of the traditional lubricating oil is overcome, and the stability is better.