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1143results about How to "The synthesis process is simple" patented technology

Self-healing polyurethane resin containing disulfide bond and preparation method thereof

InactiveCN105482065ARepair damageStrong performance controllabilitySelf-healingPolyester
The invention relates to self-healing polyurethane resin containing disulfide bond and a preparation method thereof. The polyurethane resin comprises, by weight parts, 10-30 parts of polyether or polyester polyol, 3-20 parts of polyisocyanates, 1-10 parts of chain extender containing the disulfide bond, 0.001-1 part of organic tin or tertiary amine catalyst and 50-80 parts of organic solvent. The method for preparing the self-healing polyurethane resin containing the disulfide bond comprises the steps of weighing raw materials, stirring, heating and performing dehydration for the polyether or polyester polyol under vacuum conditions, lowering the temperature to 85 DEG C or below, adding the polyisocyanates and the organic tin or tertiary amine catalyst, reacting, lowering the temperature to 50 DEG C or below, adding the organic solvent and the chain extender containing the disulfide bond, reacting and performing vacuum defoamation to obtain the self-healing polyurethane resin. The self-healing polyurethane resin heals by itself under the heating or ultraviolet (UV) light conditions, the required conditions are mild, the healing speed is high, the effect is good, the preparation method is simple and easy to control, and raw materials are goods of commercialized production and are cheap and easy to obtain.
Owner:DONGHUA UNIV

Method for preparing cathode material of sodium-ion battery, namely sodium vanadium fluorophosphates

The invention discloses a method for preparing a cathode material of a sodium-ion battery, namely sodium vanadium fluorophosphates. The method comprises the following steps: using a vanadium source, a phosphorus source and a carbon source as main synthetic raw materials; dissolving into deionized water according to the molar ratio 1:1:1.2 of vanadium: phosphorus: carbon, heating in water bath, and continuously stirring to obtain light green pulp; after vacuum drying, grinding, then transferring into a tube furnace, preburning in an inert atmosphere at a certain temperature rise rate, cooling and then taking out to obtain black VPO4/C precursor powder; mixing the VPO4/C with NaF according to a stoichiometric ratio, ball-milling for 3 hours, sending into the tube furnace, then roasting in the inert atmosphere at the certain temperature rise rate, and cooling along with the furnace to obtain a positive active material NaVPO4F/C. According to the invention, cheap and easily-obtained pentavalent vanadium oxide or trivalent vanadium oxide is used as the main raw materials to prepare the sodium vanadium fluorophosphates cathode material through a sol gel activated auxiliary two-step high-temperature solid phase method, and the sodium vanadium fluorophosphates cathode material has the advantages of good stability, uniform particle size and good electrochemical performance. Meanwhile, the method has the advantages of simple synthesis process, short period and low cost and is convenient for large-scale production.
Owner:TIANJIN POLYTECHNIC UNIV

Method for preparing magnetic powder heavy metal ion blotting chitosan compound adsorbing agent

The present invention provides a preparation of a chitosan compound adsorbent for absorbing magnetic powder heavy metal ion imprint. The chitosan is employed as a imprinting matrix material, the nanometer magnetic powder Fe3O4 is employed as a magnetic component, the epichlorohydrin is employed as a crosslinking agent, the sodium tripolyphosphate is employed as a curing agent, after steps of ion imprinting, magnetic powder embedding and curing and template ion eliminating, the magnetic metal ion imprinting chitosan compound adsorbent is obtained. The compound absorbent prepared by the present invention can be separated from the solution after absorption efficiently and rapidly under the external magnetic field to realize the rapid efficient reclaim of the adsorbent. The compound absorbent has high mechanical strength and selective absorbability of imprint Cr(VI) or Zn (II), avoids the swelling loss of the chitosan in acidity solution and improves the absorption capacity of Cr(VI) or Zn (II). The preparation of the present invention has simple reaction conditions and has no rigorous limit of the experiment conditions. The preparation of the present invention can be used to process the heavy metal waste water containing Cr(VI) or Zn (II), also reclaim Cr(VI) or Zn (II).
Owner:HARBIN ENG UNIV

Method for synthesizing mesoporous mordenite

The invention relates to a method for synthesizing mesoporous mordenite, which mainly solves the problems that precious materials are needed to serve as mesoporous templates, the synthesis process is complicated and the cost is high in the prior art for preparing mesoporous zeolite. The method comprises the following steps of: mixing a silicon source, an aluminum source, an organic amine structure directing agent (SDA), a polymer mesoporous template agent R and water, wherein in the mixture, the molar ratio of SiO2 to Al2O3 is 8-500, the molar ratio of H2O to SiO2 is 5-100, the molar ratio ofSDA to SiO2 is 0-0.5, and the weight ratio of the polymer mesoporous template agent R to SiO2 is 0.05-3; and crystallizing the mixture at the temperature of between 100 and 200DEG C for 1 to 10 days to obtain a crystallization product, and washing, drying and roasting the crystallization product to obtain the mesoporous mordenite, wherein the polymer mesoporous template agent R is at least one ofstarch, dextrin, cellulose, polyethylene glycol, polyvinyl alcohol, polyether, polyvinyl formal and polyvinyl butyral. The technical scheme well solves the problems. The synthesized mesoporous mordenite has a micropore-mesopore composite structure; the synthesis process is simple; the mesoporous mordenite with the composite hole structure can be synthesized at low cost, better technical effect isachieved, and the method can be used for industrial production of the mesoporous mordenite.
Owner:CHINA PETROLEUM & CHEM CORP +1

Method for manufacturing biological detector of field effect transistor based on carbon nano tube

The invention relates to a method for manufacturing a biological detector of a field effect transistor based on a non-covalent modified single-walled carbon nano tube, which belongs to the technical fThe invention relates to a method for manufacturing a biological detector of a field effect transistor based on a non-covalent modified single-walled carbon nano tube, which belongs to the technical field of nano electronic device manufacture and biological analysis and detection. The method comprises the following steps: setting up the single-walled carbon nano tube (beam) between an interdigitalield of nano electronic device manufacture and biological analysis and detection. The method comprises the following steps: setting up the single-walled carbon nano tube (beam) between an interdigital source electrode and a drain electrode made on a silicon substrate of which the surface contains an insulating oxide according to a photoetching technique; constructing the field effect transistor basource electrode and a drain electrode made on a silicon substrate of which the surface contains an insulating oxide according to a photoetching technique; constructing the field effect transistor based on the carbon nano tube; and modifying a non-covalent glycosylation organism on the surface of the carbon nano tube to obtain a field effect transistor based on the carbon nano tube for the detectsed on the carbon nano tube; and modifying a non-covalent glycosylation organism on the surface of the carbon nano tube to obtain a field effect transistor based on the carbon nano tube for the detection of the recognition function of saccharide-protein specificity. The method can selectively modify different sugar molecules to detect specificity combining actions between different sugar ligands aion of the recognition function of saccharide-protein specificity. The method can selectively modify different sugar molecules to detect specificity combining actions between different sugar ligands and receptors so as to form the universal, flexible and efficient biological detector of the field effect transistor based on the carbon nano tube.nd receptors so as to form the universal, flexible and efficient biological detector of the field effect transistor based on the carbon nano tube.
Owner:SHANGHAI UNIV

Ultraviolet light curable high-strength polyurethane acrylate resin and preparation method thereof

InactiveCN108383974AOptimize the synthetic routeThe synthesis process is simple and controllablePolyesterAdhesive
The invention relates to ultraviolet light curable high-strength polyurethane acrylate resin and a preparation method thereof. The resin is composed of the following components: 50-80 wt% of polyurethane acrylate and 20-50 wt% of a reactive diluent, wherein the polyurethane acrylate is composed of the following materials: 32-50 wt% of diisocyanate, 19-29 wt% of hydroxyacrylate, 22-49 wt% of a polyester polyol, 0.05-0.3 wt% of a catalyst, and 0.02-0.05 wt% of a polymerization inhibitor; and the method comprises the following steps: 1, mixing the diisocyanate (-NCO: 2 mol), the catalyst, the polymerization inhibitor and the hydroxyacrylate (-OH: 1 mol), and performing a reaction for 2-5 h at the temperature of 45-65 DEG C to obtain a first step product; 2, adding the polyester polyol (-OH: 1mol), and performing a reaction for 1-4 h at the temperature of 65-85 DEG C to obtain polyurethane acrylate (PUA); and 3, adding the reactive diluent to obtain the PUA resin. The method provided by the invention adopts the aromatic polyester polyol to improve the number of double bonds and structural rigidity of the PUA resin, so that the PUA resin can be rapidly cured and has high strength and high modulus; and the resin can be cured by ultraviolet light and heat, and has broad application prospects in the fields of composite material resin matrix, coatings, adhesives and structural adhesives.
Owner:WUHAN UNIV OF TECH

Process for reserve recycling and preparation of lithium nickel cobaltate from waste lithium battery as raw material

The invention discloses a process for reserve recycling and preparation of lithium nickel cobaltate from a waste lithium battery as a raw material, and belongs to the field of waste lithium battery recycling. According to the process disclosed by the invention, an anode material of the waste lithium ion battery is recycled, a new lithium nickel cobaltate anode material is synthesized by means of a reserve recycling process, the regenerated anode material meets the performance requirements for native products, and resource utilization is achieved; the prepared primary product of lithium nickel cobaltate is treated by using a reducing metal powder so that the obtained lithium nickel cobaltate has oxygen vacancy; LiNixCo1-xO2-y is obtained, wherein x is not less than 0.33 and not more than 0.67, and y is not less than 0.05 and not more than 0.5; the oxygen vacancy can be used for enhancing the migration capacity of lithium ions in the lithium nickel cobaltate crystal structure and enhancing the discharge capacity of the battery. The reducing metal powder adopted by the process disclosed by the invention has the advantages that the synthesis process can be simplified and the cost for preparing the oxygen vacancy can be reduced.
Owner:GUANGDONG BRUNP RECYCLING TECH +1

Spherical mesoporous carbon nitride photocatalyst with multistage nano structure

The invention discloses a spherical mesoporous carbon nitride photocatalyst with a multistage nano structure and a preparation method and application thereof and belongs to the technical field of material preparation and photocatalysis. The spherical mesoporous carbon nitride photocatalyst with the multistage nano structure is prepared by using cyanamide as a precursor, using spherical mesoporous silicon dioxide with a highly open structure as a hard template, carrying out thermal thermal polymerization and removing the hard template. The spherical mesoporous carbon nitride prepared by the preparation method has the characteristic that nanosheet or nanosheet-like small particles are uniformly diffused around from the sphere center to form a spherical micro nano structure of which the surface structure is highly open; compared with conventional bulk phase carbon nitride, the spherical mesoporous carbon nitride photocatalyst can obviously improve the specific surface area and the mass transfer effect and has efficient photocatalytic hydrogen production performance in the visible light. The spherical mesoporous carbon nitride photocatalyst adopts a simple synthetic process, has high catalysis efficiency and has wide application prospect in the field of catalysis/photocatalysis.
Owner:FUZHOU UNIVERSITY

High-efficiency Fenton magnetic catalyst based on clay minerals and preparation method and application thereof

The invention relates to a high-efficiency Fenton magnetic catalyst based on clay minerals and a preparation method and an application thereof. The preparation method comprises the preparation steps: (1) putting clean clay minerals into a pre-prepared ferric salt solution, heating the suspension after mixing to 60-100 DEG C, and continuously stirring for 0.5-5 h to reach stable; (2) adding an alkali liquor into the suspension, making the pH value of the solution rise to 8-11, continuously stirring for 0.5-6 h, and carrying out washing, drying and other processes of a solid precipitate to obtain a precursor powder; and (3) impregnating the precursor powder in a solution containing other non-ferrous metal salts, uniformly drying by distillation, carrying out heat treatment, and thus obtaining the high-efficiency Fenton magnetic catalyst based on the clay minerals. Compared with the prior art, the catalyst has magnetic separation performance, can be recycled and reused, and also has high-efficiency Fenton catalytic activity and stability in a near neutral pH value. The catalyst has the advantages of simple preparation process, relatively low cost and good ecological compatibility, and has wide application prospects in the field of treatment of difficult-to-degrade toxic organic pollutants.
Owner:SHANGHAI JIAO TONG UNIV

Preparation method for perylene bisimide polyurethane liquid crystal non-covalent modified graphene

The invention discloses a preparation method for perylene bisimide polyurethane liquid crystal non-covalent modified graphene. The preparation method comprises the following steps: adding perylene and zinc acetate into N-methyl pyrrolidone, stirring and heating to 150-160 DEG C, adding diglycolamine, reacting for 12 hours, pouring into absolute ethyl alcohol for precipitating and discharging, filtering, and drying in vacuum to obtain hydroxyl-terminated perylene bisimide; taking and dissolving the hydroxyl-terminated perylene bisimide into N, N-dimethyl formamide, adding hexamethylene diisocyanate and a catalyst, heating to 60-65 DEG C and reacting for 6 hours under protection of N2, adding polyethylene glycol, heating to 90-95 DEG C and reacting for 8 hours, pouring reaction liquid into distilled water for precipitating and discharging, filtering, and drying in vacuum to obtain perylene bisimide polyurethane liquid crystals; and taking and dissolving the perylene bisimide polyurethane liquid crystals into chloroform, adding graphene, ultrasonically treating for 2-3 hours, carrying out suction filtration, washing by chloroform, and drying in vacuum to obtain the perylene bisimide polyurethane liquid crystal non-covalent modified graphene. The method disclosed by the invention has the advantages of being wide in material source, simple in process, low in price, small in pollution and the like.
Owner:绍兴盖诺超菱润滑材料有限公司

Preparation method of large-sized perovskite structure CH3NH3PbI3 crystal

The invention discloses a preparation method of a large-sized perovskite structure CH3NH3PbI3 crystal. The method comprises the following steps: dissolving PbI2 into an HI (Hydrogen Iodide) solution, and preparing a Pb<2+>-HI solution; mixing the HI solution with a CH3NH2 solution in the molar ratio of 1:1, and reacting the mixture at the temperature of 0 DEG C for 2 hours to obtain a CH3NH2I solution; mixing the Pb<2+>-HI solution with the CH3NH2I solution, preheating at the temperature of 95 DEG C for 48-72 hours to obtain an oversaturated solution, and filtering the oversaturated solution to obtain a mother liquor for growing the CH3NH3PbI3 crystal, wherein the molar ratio of CH3NH2I to Pb<2+> is (1-2):1; and preheating the mother liquor in a water bath of 95.5-96 DEG C for 12-24 hours, placing the preheated mother liquor into a crystal growing container, performing programmed cooling to 45 DEG C, and keeping a constant temperature to obtain the CH3NH3PbI3 crystal. In a process of the method, the HI solution participates in the synthesis of raw materials, and is taken as a solvent of crystal growing, so that the method has the advantages of simple synthesizing process and small number of side reactions; and a growing device is simple, and a high-quality and large-sized crystal can be grown.
Owner:江苏荣辉电力设备制造有限公司

High-density spherical cobaltic-cobaltous oxide and method for preparing the same

The invention provides a high density spherical shape Co3O4 and a preparation method thereof, and relates to a Co3O4, in particular to the preparation of the high density spherical shape Co3O4, which is mainly used for preparing lithium cobaltoxide of anode material of a lithium ion battery, and also is used as Co3O4 of electronic grade, and belongs to the products of chemical industry. The invention provides a preparation method of the high density spherical shape Co3O4 with good fluidity, the prepared Co3O4 is enabled to be a spherical shape particle which has best stacking density and can effectively improve the tap density of the particle, thereby improving the electrochemistry property of the lithium ion battery and the quality of the lithium ion battery. The Co3O4 prepared by the method is a spherical shape crystal, the mean grain size is 5-25 micrometers, the loose packed density is more than or equal to 1.0g/cm<3>, the tap density is more than or equal to 2.0g/cm<3>, and the cobalt content is more than or equal to 73 percent. The process of the method is simple, and the lithium cobaltoxide synthesized by the Co3O4 presents better property, compared with the past Co3O4, the electrochemistry property of the lithium ion battery can be improved.
Owner:GUANGZHOU RONGJIE MATERIAL TECH
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