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42 results about "Hydrothermal deposition" patented technology
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Hydrothermal solution. Hydrothermal mineral deposits are those in which hot water serves as a concentrating, transporting, and depositing agent. They are the most numerous of all classes of deposit. Hydrothermal deposits are never formed from pure water, because pure water is a poor solvent of most ore minerals.
Oriented ZnO nanorod or nanowire film and preparation process thereof
InactiveCN1763263AHigh crystallinityGood orientationPolycrystalline material growthFrom normal temperature solutionsHydrothermal depositionZinc
The present invention relates to directional nanometer zinc oxide stick or linear film and its preparation process, and belongs to the field of low-dimensional nanometer film material technology. The present invention adopts hydrothermal deposition process, in which zinc salt solution in molar concentration 1-25 mM and amine surfactant solution are mixed homogeneously and set inside stainless steel reactor with PTFE lining, substrate of glass, polymer, inorganic metal, non-metal or other material and with directional texture ZnO crystal seed is set inside the lining, so as to react at 50-150 deg.c for 1-6 hr. After cooling naturally, directionally grown and high crystallized ZnO nanometer stick array film or nanometer stick of diameter 10-500 nm may be form. The process has low synthesis temperature and easy control, and the grown ZnO film is well directional. The present invention is suitable for industrial production of directional nanometer ZnO stick or film.
Owner:TSINGHUA UNIV
Hydrothermal deposition preparation of load type single metal hydrogenation catalyst
ActiveCN101298043BImprove and increase dispersionImprove hydrodesulfurization activityMetal/metal-oxides/metal-hydroxide catalystsRefining to eliminate hetero atomsOrganic acidPtru catalyst
The present invention provides a preparation method for a load type hydrogenation catalyst with high activation by hot water deposition. The saline solution of the reactive metal of VIB family is taken as a precursor, an inorganic acid solution as a precipitator and an organic acid as a dispersant; the metallic oxide particles are generated by a liquid deposition reaction in a hydrothermal condition; the organic acid is used for avoiding the conglobation of the oxide particles as well as reducing mutual effects between the oxide and a carrier; the high reaction activation and strong penetrability of subcritical water is utilized to evenly disperse active components on the carrier. The method is particularly suitable for preparing a W / gamma-Al2O3 catalyst, the prepared W / gamma-Al2O3 catalyst has high dispersion degree, relatively weak mutual effects between the active components and the carrier and higher desulfurization activation compared with a catalyst which has same content of active components and is prepared by a conventional pore volume saturation soaking method.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Composite photocatalytic material, preparation method and application thereof
InactiveCN105148968AImprove degradation rateImprove magnetismPhysical/chemical process catalystsWater/sewage treatment by irradiationHydrothermal depositionCalcination
The invention provides a composite photocatalytic material, a preparation method and an application of the composite photocatalytic material. The preparation method comprises: obtaining a precursor of g-C3N4 through high-temperature calcination; preparing a magnetic composite of Fe3O4 / g-C3N4 through hydrothermal deposition; and allowing the magnetic composite to react in a solution of silver nitrate through a thermal photodeposition method to obtain the composite photocatalytic material of Ag / Fe3O4 / g-C3N4. The composite is high in dispersion and activity, can degrade tetracycline in the environment, and has characteristics of simple synthesis and high degradation rate.
Owner:JIANGSU UNIV
Octanol hydrorefining catalyst and preparation method thereof
InactiveCN101791556AHigh surface active sitesIncreased surface active sitesOrganic compound preparationPreparation by hydrogenationRare-earth elementNickel salt
The invention discloses an octanol hydrorefining catalyst, which belongs to the field of hydrorefining catalytic materials. The prepared catalyst is used for modifying a carrier by using a rare earth element, reducing the amount of an active component of a nickel ion entering a carrier framework and improving the content of surface nickel species; the active component is loaded by adopting a hydrothermal deposition method, the dispersion of nickel salts on the surface of a carrier pore canal by using hydrothermal high-temperature and high-pressure conditions and forming nickel precipitation with proper size at the loading initial period of the active component by using a deposition reaction, so the invention can effectively control the amount of the nickel ions entering the carrier, improve the content of the surface nickel species and simultaneously can avoid the growth of nickel oxide particles; and the catalyst greatly increases the surface nickel active site, effectively improves the utilization rate of the active component of nickel and has higher catalytic reaction activity during hydrorefining the octanol at higher airspeed. The result shows that the hydrogenation rate of an unsaturated substance in crude octanol reaches over 90 percent when the temperature is 120DEG c, the pressure is 2.5MPa, the ratio of hydrogen to liquid for feeding is 8:1 and the airspeed is 30<-1>hour.
Owner:UNIV OF SCI & TECH BEIJING
NiOOH@CuO/Cu2O composite nanosheet array film as well as preparation method and application thereof
ActiveCN106158408AHigh theoretical capacityImprove conductivityMaterial nanotechnologyHybrid capacitor electrodesCapacitanceHydrothermal deposition
The invention discloses a NiOOH@CuO / Cu2O composite nanosheet array film as well as a preparation method and application thereof. The method comprises the following steps: growing CuO / Cu2O nanosheet arrays vertical to a substrate and in stagger arrangement on the surface of a high-purity copper material by adopting an anode oxidation technology; performing hydrothermal deposition treatment in an aqueous solution of nickel nitrate; and performing in-situ deposition of a nickel oxide hydroxide nano product on the nanosheet arrays to obtain a NiOOH@CuO / Cu2O nanocomposite. The prepared electrode material gives full play to the electrochemical synergism between the CuO / Cu2O nanosheet arrays and NiOOH, and shows ultrahigh specific capacitance property and good cycling stability while the preparation steps are simple and controllable; and therefore, the electrode material is a super capacitor electrode material with practical application value.
Owner:HEFEI UNIV OF TECH
Method for preparing photoelectrode of alpha-iron oxide film by single-source precursor
InactiveCN105039938ASimple and fast operationLow costLiquid/solution decomposition chemical coatingElectrodesTin dioxideFerric oxalate
The invention provides a method for hydrothermal deposition of an iron oxide film through a one-step method by using single-source soluble complex iron salt as a precursor. The firm and compact iron oxide film is obtained through performing hydrothermal deposition onammonium ferric citrate or ammonium ferric oxalate serving as a raw material at a temperature of 90-200 DEG C. The iron oxide film, prepared by adopting the method, can be directly deposited on F-doped tin dioxide electric conducting glass, a surface-treated stainless steel substrate or common glass. The film obtained by being activated in the process that the iron oxide is reduced by ethanol and reoxidized has excellent photoelectric property. The method has the advantages that the concentration of other additives in solution does not need to be adjusted due to the fact that not many reaction precursors are used; the iron oxide film is directly obtained without adopting the process of annealing FeOOH and converting the annealed FeOOH into iron oxide, so that the manufacturing cost is reduced.
Owner:XUCHANG UNIV
Ion-Conducting Ceramic Apparatus, Method, Fabrication, and Applications
InactiveUS20100015494A1Easy to transportReduce the temperaturePolycrystalline material growthPhosphatesHydrogen atmosphereSynthesis methods
A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors.
Owner:UNIVERSITY OF ROCHESTER
Ion/proton-conducting apparatus and method
InactiveUS20120040269A1Improve performanceReduce the temperatureSolid electrolytesPolycrystalline material growthHydrogen atmosphereSynthesis methods
A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors. Additional high-density and gas-tight HAP film compositions may be deposited using a two-step deposition method that includes an electrochemical deposition method followed by a hydrothermal deposition method. The two-step method uses a single hydrothermal deposition solution composition. The method may be used to deposit HAP films including but not limited to at least doped HAP films, and more particularly including carbonated HAP films. In addition, the high-density and gas-tight HAP films may be used in proton exchange membrane fuel cells.
Owner:UNIVERSITY OF ROCHESTER
Preparation method of high-activity segregative TiO2 photocatalyst
InactiveCN101837285AHigh activityPhysical/chemical process catalystsWater/sewage treatment by irradiationSulfateTitanium
The invention discloses a preparation method of high-activity segregative TiO2 photocatalyst. The method takes the sulfate aqueous solution of Ti and carbamide as raw material and prepares the TiO2 powder photocatalyst through hydrothermal deposition and high temperature calcination. The TiO2 powder photocatalyst prepared through the method catalyzes the light degradation of organic contaminant in water, compared with nanometer P25 TiO2 photocatalyst produced by Germany Degussa, has higher photocatalysis activity, good sedimentation, segregative performance and recycle and greatly improves the practicality of the TiO2 photocatalyst in waste water processing.
Owner:CHINA WEST NORMAL UNIVERSITY
A Microwave Synthesis Method of ZnO Thin Films with Oriented Nanorod Structure
InactiveCN102260046AHigh crystallinityGood orientationZinc oxides/hydroxidesSynthesis methodsCrystallinity
The invention relates to the synthesis of low-dimensional nanomaterial films, and provides a microwave synthesis method of a zinc oxide film with an oriented nanorod structure. The method is characterized in that a microwave-hydrothermal deposition method is adopted, a zinc salt solution with a molar concentration of 1-150 mM and a hexamethylene tetramine solution are used as raw materials, a blank substrate is placed inside a microwave digestion container, then the container is sealed and placed in a microwave digestion instrument, and after the reaction is carried out at 50-180 DEG C for 0-4 hours, natural cooling is carried out so as to realize the oriented growth of a high-crystallinity film composed of ZnO nanorod arrays on the substrate, wherein the diameter of the nanorods is about50-300 nm. The microwave-hydrothermal method provided by the invention combines the advantages of microwave and hydrothermal methods, improves the film crystallinity, and significantly improves the film quality. The synthesis method has the advantages of short synthesis time, low synthesis temperature and no need for induced hydrothermal deposition of seed crystals; and the grown ZnO film with the nanorod structure has the advantages of uniform micro morphology, good crystallinity and growth direction perpendicular to the substrate, and is suitable for industrial production.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Supported precious metal catalysts via hydrothermal deposition
A process for making a catalyst having precious metal nanoparticles deposited on a support includes first providing an aqueous dispersion of support particles. A pre-treatment slurry is prepared by mixing the aqueous dispersion of support particles with a water-soluble precious metal precursor and a reducing agent. The pre-treatment slurry is hydrothermally treated at a temperature in the range of from about 40° C. to about 220° C. for a time sufficient to deposit precious metal nanoparticles on the surface of the support particles, the precious metal nanoparticles having an average particle size less about 50 nm.
Owner:TRONOX LLC
Device and method for preparing super-amphiphobic self-cleaning oil-water separation material
ActiveCN107596735ALow priceSimple preparation processLiquid separationChemical physicsSeparation technology
The invention relates to a device and a method for preparing a super-amphiphobic self-cleaning oil-water separation material, belongs to the fields of chemistry and chemical engineering, functional material and nanometer technology and in particular relates to a device with super-amphiphobic property and high separation rate. According to the device with the self-cleaning function, a main body part is an inverted T-shaped three-way pipe. Aiming at the defects existing in the conventional oil-water separation technology, titanium dioxide with a nanorod structure grows on the surface of a porousmetal substrate by a simple one-step hydrothermal deposition method, and multiple types of oil including diesel oil are respectively and simply wetted, so that the material has the super-amphiphobicproperty (super-hydrophobic in oil and super-oleophobic in water), and is applied to a special separation device so as to realize stable, continuous and high-efficiency oil-water separation. Moreover,the method is readily available in materials, simple in preparation and environmental-friendly, and the prepared material has the self-cleaning function and has very wide application prospects.
Owner:JILIN UNIV
Copper germinate nano-wire and preparation thereof
InactiveCN101434406ALow preparation temperatureEasy to prepareGermanium compoundsSolventSingle crystal
The invention discloses a copper germanic acid nano wire and a preparation method thereof, belonging to the technical field of nano material preparation. The copper germanic acid nano wire consists of single-crystal copper germanic acid core and a very thin amorphous copper germanic acid casing covered on the external layer. The preparation method takes germanium dioxide and sheet copper as raw material and water as a solvent, wherein, the sheet copper is also used as a deposition substrate. The preparation method comprises the steps of: ultrasonically cleaning the sheet copper in distilled water for 10 minutes, fixing the sheet copper in a reaction kettle vessel, uniformly stirring the sheet copper, insulating heat for 0-24 hours under the temperature of 200-500 DEG C and the pressure of 1-15MPa, and finally obtaining the copper germanic acid nano wire on the sheet copper. The preparation method has the advantages of free growth template addition, simple preparation process, easy operation and control, low growth temperature and lower preparation cost. In addition, as the method adopts the processes of innocuous germanium oxide and hydro-deposition, the raw material and the preparation process are harmless to the environment, therefore, the requirement of environmental protection is met. The preparation method can realize the mass preparation of the copper germanic acid nano wire.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY
Ion-/proton-conducting apparatus and method
InactiveUS7943269B2Polycrystalline material growthPhosphatesHydrogen atmosphereHydrothermal deposition
A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors.
Owner:UNIVERSITY OF ROCHESTER
C/C, Ni and Cu composite material and preparation method and application thereof
ActiveCN110066972AAchieve densificationAchieve graphitizationPower current collectorsFiberCarbon fibers
The invention provides a C / C, Ni and Cu composite material and a preparation method and application thereof. According to the preparation method, chopped carbon fiber is used as a framework; a carbonlayer is deposited on the surface of the carbon fiber through microwave hydrothermal reaction; glucose is used as a carbon source, nickel nitrate hexahydrate is used as a nickel source, urea is used as a precipitant, and C and NiO particles are deposited in a carbon fiber prefabrication through the hydrothermal technology; a C / C and NiO composite material through hydrothermal deposition is subjected to sintering by using vacuum carbothermic reduction to obtain a C / C and Ni composite material; catalytic graphitization of matrix carbon is achieved; and by utilizing the infinite miscibility of Niand Cu, the C / C, Ni and Cu composite material is prepared through the melting copper infiltration technology, so that the C / C, Ni and Cu composite material with excellent properties is obtained.
Owner:SHAANXI UNIV OF SCI & TECH
Catalyst for tail gas purification
ActiveCN107442117AHigh decomposition temperatureImprove thermal stabilityGas treatmentHeterogenous catalyst chemical elementsCeriumHydrothermal deposition
The invention discloses a catalyst for tail gas purification. The catalyst for tail gas purification comprises a praseodymium-doped cerium dioxide carrier and noble metal oxide loaded on the carrier; the catalyst is prepared according to the steps of preparing a Ce1-xPrxO2 carrier precursor in advance by a self-assembling method, and loading the noble metal oxide on the Ce1-xPrxO2 carrier precursor according to a hydrothermal deposition method. The thermal decomposition temperature of the noble metal oxide is increased by utilizing strong mutual action between the Ce1-xPrxO2 and the noble metal, so that the heat stability and the activity of the catalyst are obviously improved.
Owner:FUZHOU UNIV
Preparation method of CoPi/Ag/bismuth vanadate composite photoelectric anode material
InactiveCN109865525AImprove performanceLower transfer resistancePhysical/chemical process catalystsElectrodesElectron holeComposite film
The invention provides a preparation method of a CoPi / Ag / bismuth vanadate composite photoelectric anode material. According to the method, CoPi / Ag is successfully loaded on the surface of BiVO4 by hydrothermal deposition to form a stable photoelectric anode composite thin film CoPi / Ag / BiVO4. The functions of plasma Ag nanoparticles and the Co-Pi cocatalyst are utilized to expand the visible lightabsorption range of bismuth vanadate, and thus the light can be effectively captured, the charge transfer resistance is reduced, and the rapid migration of the charge carrier is accelerated, thereby the recombination of electron-hole pairs is inhibited, and photoelectrocatalytic properties of the BiVO4 composite photoelectric anode is improved.
Owner:NORTHWEST NORMAL UNIVERSITY
Ion/proton-conducting apparatus and method
InactiveUS8916311B2Improve performanceEasily and inexpensively be coatedPolycrystalline material growthSolid electrolytesHydrogen atmosphereElectrochemistry
A c-axis-oriented HAP thin film synthesized by seeded growth on a palladium hydrogen membrane substrate. An exemplary synthetic process includes electrochemical seeding on the substrate, and secondary and tertiary hydrothermal treatments under conditions that favor growth along c-axes and a-axes in sequence. By adjusting corresponding synthetic conditions, an HAP this film can be grown to a controllable thickness with a dense coverage on the underlying substrate. The thin films have relatively high proton conductivity under hydrogen atmosphere and high temperature conditions. The c-axis oriented films may be integrated into fuel cells for application in the intermediate temperature range of 200-600° C. The electrochemical-hydrothermal deposition technique may be applied to create other oriented crystal materials having optimized properties, useful for separations and catalysis as well as electronic and electrochemical applications, electrochemical membrane reactors, and in chemical sensors. Additional high-density and gas-tight HAP film compositions may be deposited using a two-step deposition method that includes an electrochemical deposition method followed by a hydrothermal deposition method. The two-step method uses a single hydrothermal deposition solution composition. The method may be used to deposit HAP films including but not limited to at least doped HAP films, and more particularly including carbonated HAP films. In addition, the high-density and gas-tight HAP films may be used in proton exchange membrane fuel cells.
Owner:UNIVERSITY OF ROCHESTER
Porous electrode as well as conductive treatment method thereof
ActiveCN109786119ALower internal resistanceSolve the problem of inability to control the electrode morphologyHybrid capacitor electrodesHybrid/EDL manufactureFiberSlurry coating
The invention relates to a porous electrode as well as a preparation method for conductive treatment and application thereof. Plant fibers and nanocellulose are introduced into a conventional electrode pulping and coating technological process, and a three-dimensional mesh structure is formed during the drying process of an electrode material by utilizing the excellent water absorption and water retention of the plant fibers and the nanocellulose. The porous electrode is further wetted and coated with conductive slurry, and a conductive path is formed along the three-dimensional mesh structureof the porous electrode, thereby improving the conductivity of the electrode, and significantly enhancing the energy density and power density of capacitors or lithium ion capacitors. The contradiction between electrochemical deposition, hydrothermal deposition and other electrode morphology control technologies and large-scale production is solved, and the technical problems of incapability of controlling the electrode morphology and the like in the conventional slurry coating process is solved. At the same time, the preparation process has the advantages of high efficiency and simplicity.
Owner:CHINA THREE GORGES UNIV
Preparation method of Zn/adhesive-free ZSM-11 molecular sieve catalyst
ActiveCN107175126AImprove conversion rateHigh yieldMolecular sieve catalystsHydrocarbon from oxygen organic compoundsMolecular sieveAdhesive
The invention provides a preparation method of a Zn / adhesive-free ZSM-11 molecular sieve catalyst. The method comprises the following specific steps: exchanging a synthesized Na-type adhesive-free ZSM-11 molecular sieve with a 0.5 to 1.0mol / L ammonium nitrate solution at the temperature of 70 to 90 DEG C, drying, calcining, and performing steam treatment to prepare an H-type molecular sieve; loading metal zinc on the obtained molecular sieve in an amount of 0.5 to 10.0 percent by weight through a hydrothermal deposition method, drying and calcining to obtain a desired catalyst. Compared with a Zn-loaded ZSM-11 molecular sieve catalyst only containing a silicon oxide adhesive, the Zn-loaded adhesive-free ZSM-11 molecular sieve catalyst has the advantage that the butane transformation rate and the aromatic hydrocarbon yield are increased.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
A kind of preparation method of modified calcium oxide-based high-temperature carbon dioxide adsorbent
ActiveCN106179172BFast adsorptionLarge adsorption capacityGas treatmentOther chemical processesSorbentHydrothermal deposition
Owner:静乐县亨鑫建材有限公司
Super-hydrophobic glass fiber composite oil-water separation material and preparation method and application thereof
InactiveCN113262640AImprove hydrophobicity and lipophilicityEasy to separateMembranesSemi-permeable membranesBASIC CUPRIC CARBONATEGlass fiber
Owner:ZHEJIANG UNIV OF TECH
Method for preparing modified calcium oxide-based high-temperature carbon dioxide adsorbent
ActiveCN106179172AFast adsorptionLarge adsorption capacityGas treatmentOther chemical processesSorbentHydrothermal deposition
The invention discloses a method for preparing a modified calcium oxide-based high-temperature carbon dioxide adsorbent and belongs to the technical field of adsorbents. The method disclosed by the invention comprises the following steps: taking snail shells as raw materials, grinding to obtain calcium carbonate through brine wash grinding, performing compound modification on calcium carbonate by using flavones-enriched ginkgo extract and microbes, coating the carbonic acid surface with aluminum source by adopting a hydrothermal deposition method, and performing high-temperature calcinations to obtain the carbon dioxide adsorbent. According to the invention, the surface of calcium carbonate is modified by hydroxyl-enriched ginkgetin, so that hydroxyl functional groups on the calcium carbonate surface are increased, active sites are provided for aluminum source deposition, an aluminum oxide crystal layer is deposited on the calcium oxide surface due to high-temperature calcination, and the heat resistance of calcium oxide is improved. Meanwhile, the adsorbing capacity of calcium oxide on carbon dioxide is improved, the problems that the adsorbing capacity and recycled adsorption rate of calcium oxide are influenced because the traditional carbon dioxide adsorbent is insufficient in heat resistance and a microstructure of calcium oxide easily changes under the effect of high temperature cracking are solved, and the method has wide application prospects.
Owner:静乐县亨鑫建材有限公司
Super-hydrophobic glass fiber composite oil-water separation material as well as preparation method and application thereof
InactiveCN114432899AImprove hydrophobicity and lipophilicityEasy to separateMembranesSemi-permeable membranesBASIC CUPRIC CARBONATEGlass fiber
The invention discloses a preparation method and application of a super-hydrophobic glass fiber composite oil-water separation material, and the material preparation method comprises the following steps: dissolving basic cupric carbonate in an alkali solution to obtain a mixed solution I; impregnating a glass fiber felt in the mixed solution I to obtain a CuO glass fiber felt; dissolving polydimethylsiloxane in an organic solvent to obtain a mixed solution II; and soaking the CuO glass fiber felt in the mixed solution II, and carrying out high-temperature curing treatment to obtain the super-hydrophobic glass fiber composite oil-water separation material. The super-hydrophobic glass fiber composite oil-water separation material is prepared by loading a copper oxide crystal and a polydimethylsiloxane (PDMS) solution onto the surface of a glass fiber composite material by using a hydrothermal deposition method and an excessive impregnation method respectively. Due to ultrahigh hydrophobic and oleophylic properties and a superposable combination mode, the material has a good demulsification effect on various emulsified oil, and can be widely applied to oil-water separation operation.
Owner:ZHEJIANG UNIV OF TECH
Hydroxyapatite coating based on polyether-ether-ketone and preparation method thereof
ActiveCN113633824APhysical stabilityStable chemical propertiesPharmaceutical delivery mechanismTissue regenerationPoly ether ether ketoneHydroxyapatite coating
The present invention discloses a hydroxyapatite coating based on polyether-ether-ketone and a preparation method thereof. The preparation method comprises the following steps: mixing polyether-ether-ketone powder and Ca(OH)2 powder, carrying out tabletting molding, and carrying out heat treatment, so as to obtain a composite substrate material; pretreating a composite substrate material; placing a substrate material in the hydrothermal solution, and heating to complete hydrothermal deposition; and washing a hydrothermal deposition sample, drying, and preserving heat to obtain the hydroxyapatite coating on the surface of the PEEK and Ca(OH)2 composite material substrate. The coating prepared by adopting the method is of a dense nano columnar structure, is firmly combined with a matrix, can effectively solve the problem of biological inertia on the surface of PEEK, can be well attached to the surface of bone tissue, remarkably promotes the osteogenesis function of cells, and is beneficial to implantation and use of a substrate material; and the coating is suitable for industrial large-scale production and has a good application prospect.
Owner:BAOJI UNIV OF ARTS & SCI
Hydrothermal deposition of thin and adherent metal oxide coatings for high temperature corrosion protection
InactiveUS20060153983A1Easy to depositPretreated surfacesLiquid/solution decomposition chemical coatingHydrothermal depositionInterface bond
A metal oxide layer can be deposited onto surface of a structure in-situ, by exposing the surface to a precursor solution at an elevated temperature. The precursor solution contains: an organometallic, an oxidant, a surfactant, a chelating agent and water. The precursor solution is injected into the structure and maintained at a specific temperature, pH level, and pressure for a predetermined period of time. The resulting metal oxide layer is permanently attached to the structure's surface with a molecular interface bond and does not require post deposition heat treatment or additional injections of materials. As a result, the electrochemical corrosion potential of the metal surface decreases to less than −230 mVSHE and corrosion in the BWR is mitigated.
Owner:PENN STATE RES FOUND
Corrosion-inhibiting anion-intercalated hydrotalcite film prepared by hydrothermal deposition on magnesium alloy surface
ActiveCN103695871BInterchangeableImprove corrosion resistanceLiquid/solution decomposition chemical coatingHydrothermal depositionMaterials science
The invention provides a preparation method of a corrosion-inhibition anion intercalation hydrotalcite film, which solves the problems in the prior art of complex preparation technology and poor adhesion property of hydrotalcite film coatings. The preparation method comprises the following steps: a) pretreatment of a magnesium alloy sample; b) preparation of a layered dihydroxy composite metal oxide precursor (LDHs sol); c) hydro-thermal deposition of the magnesium alloy sample obtained in pretreatment in step a) and the LDHs sol in step b) in a hydro-thermal reaction vessel. The film prepared in the invention is dense, smooth, uniform in thickness, and good in substrate bonding force; since the hydrotalcite film has a corrosion-inhibition anion intercalation, a corrosion inhibition area can be formed in a boundary diffusion layer, which provides the film with high corrosion resistance. Detection shows that the hydrotalcite film of the invention has no pitting corrosion on the surface after soaked in a 3.5% NaCl solution for 12 hours.
Owner:滕州市产品质量监督检验所
Phosphorus-containing nacreous coating and preparation method thereof
ActiveCN112237648AImprove corrosion resistanceHigh bonding strengthPharmaceutical delivery mechanismTissue regenerationMg alloysAlloy substrate
The invention discloses a phosphorus-containing nacreous coating, and the phosphorus-containing nacreous coating is formed on an AZ91D alloy substrate by hydrothermal deposition. The component of coating is pearl powder prepared by mixing pearl powder; 0.5mol / L of Na2EDTA as a Ca source, and 0.5mol / L of NaH2PO4 as a P source are mixed with 35mL of ultrapure water to form a turbid liquid; after magnetic stirring, the pH value of a hydrothermal solution is regulated with an NaOH solution; a pretreated AZ91D alloy and the hydrothermal reaction solution are put into a 50mL reaction kettle together; corresponding reaction temperature and holding time are set; and after the hydrothermal reaction ends, furnace cooling is performed to room temperature to obtain the phosphorus-containing nacreous coating. In order to solve the problem that the early failure of the material is caused by the fact that degradation is excessively fast, the corrosion rate is overhigh and the corrosion range is not uniform after the medical magnesium and magnesium alloy are implanted into a body, the invention provides the phosphorus-containing nacreous coating material; the phosphorus-containing nacreous coatinghas relatively high corrosion resistance; and the degradation speed of the magnesium alloy is reduced in comparison with that of a traditional magnesium alloy, so that a relatively slow uniform corrosion effect is achieved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
A method for preparing anatase titanium dioxide nanoribbon array film
ActiveCN104032292BPromote crystallizationSimple processMaterial nanotechnologyMetallic material coating processesElectrical batteryHydrothermal deposition
The invention discloses a method for preparing an anatase titanium dioxide nanoribbon array membrane. The method adopts a non-hydrothermal sedimentation method and comprises the following steps: immersing a pickled metal titanium plate into a hydrogen peroxide reaction liquid with melamine and tungstic acid, reacting for 6-60 hours at 60-90 DEG C, washing the reacted titanium plate by using deionized water, drying, and preserving heat for 1 hour at 450 DEG C. The method does not need a hydrothermal environment of high temperature and high pressure and is simple and feasible in preparation process and low in cost, the prepared anatase titanium dioxide nanoribbon array membrane is uniform, good in crystallization, solid in combination with a substrate, applicable to large-scale industrial production, and has the potential to be practically applied to fields such as photocatalysis, photoelectrocatalysis and thin-film solar cell photoelectrodes.
Owner:ZHEJIANG UNIV
A kind of c/c-ni-cu composite material and its preparation method and application
ActiveCN110066972BAchieve densificationAchieve graphitizationPower current collectorsFiberCarbon layer
The present invention provides a preparation of C / C-Ni-Cu composite material and its preparation method and application. The method uses chopped carbon fiber as a skeleton, and adopts microwave hydrothermal reaction to deposit a carbon layer on the surface of the carbon fiber. Glucose is the carbon source. Nickel nitrate hydrate was used as the nickel source, and urea was used as the precipitating agent to deposit C and NiO particles in the carbon fiber preform by hydrothermal technology. The hydrothermally deposited C / C‑NiO composites were sintered by vacuum carbothermal reduction reaction to obtain C / C‑Ni composites, and the catalytic graphitization of matrix carbon was realized. Using the infinite mutual solubility of Ni and Cu, the C / C-Ni-Cu composite material was prepared by molten copper infiltration technology, and the C / C-Ni-Cu composite material with excellent performance was obtained.
Owner:SHAANXI UNIV OF SCI & TECH
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