Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
44results about How to "Core-shell structure" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Core-shell structured nano-silica/polyacrylate emulsion and its preparation method
The invention provides a core-shell structured nano-silica / polyacrylate emulsion and simultaneously provides a method for preparing the emulsion by the adoption of an emulsion polymerisation method. The preparation method comprises the following steps of: firstly preparing monodispersed nano-silica by a sol-gel method, modifying the surface of the monodispersed nano-silica by the use of organosilicon silicyl oxide, dispersing the modified nano-silica into deionized water, using a seed emulsion with nano silica as the core structure and an acrylic acid ester mixed monomer to carry out polymerization encapsulation by an emulsion polymerisation method so as to form the core-shell structured nano-silica / polyacrylate emulsion. Micromorphology of emulsion particle is spherical and its structure is a core-shell structure, and nano-silica exists as the core structure.
Owner:BEIJING UNIV OF CHEM TECH
Silicone modified acrylic ester emulsion and preparation method thereof
The invention discloses a silicone modified acrylic ester emulsion and a preparation method thereof. The emulsion is prepared from the following raw materials in parts by weight: 6.5-9 parts of acrylic ester mixed monomers, 1-3.5 parts of an organosilicone monomer, 0.4-0.6 part of an emulsifier, 0.2-0.3 part of an initiating agent, 0.01-0.03 part of a pH conditioning agent, 28-32 parts of deionized water, wherein the acrylic ester mixed monomers are methyl methacrylate and butyl acrylate with the mass ratio of (5.5-6.5):(3.5-4.5); the organosilicone monomer is gamma- 3-[Tris(trimethylsiloxy)silyl]propyl methacrylate. According to the emulsion, the reactive emulsifier is adopted for polymerization reaction, the prepared emulsion is stable, and the latex film of the emulsion has lower surface energy and better water resistance, and can be used as the main film forming matter of a metal anti-corrosion coating.
Owner:INST OF IND TECH GUANGZHOU & CHINESE ACADEMY OF SCI
Anti-sticking soft dope printing adhesive and preparation method
The invention discloses anti-sticking soft dope printing adhesive and a preparation method. The adhesive comprises the following raw materials in percentage by mass: 25 to 50 percent of soft monomer, 6 to 20 percent of hard monomer, 0.8 to 5 percent of emulsifying agent, 0.1 to 0.25 percent of initiator, 0.05 to 0.5 percent of buffer, 0.04 to 0.2 percent of thiol and 40 to 65 percent of deionized water. The preparation method comprises the following steps: adding 1 / 8 to 1 / 6 of the soft monomer, the hard monomer and a functional monomer of the raw materials, total emulsifying agent and total deionized water into a reactor, stirring and emulsifying the mixture for 30 to 40 minutes at the room temperature, heating the mixture to between 50 and 65 DEG C, and adding the thiol and the initiator into the reactor; and beginning dripping the mixed monomer, preserving the heat for 2 hours at the temperature of between 50 and 65 DEG C after the dripping is finished, heating the mixture to 70 DEG C, preserving the heat for half an hour, and cooling a product to the room temperature, and discharging the product. The anti-sticking soft dope printing adhesive has the advantages that: the adhesive has excellent washing fastness, super-soft handfeel, environmental protection and no brittleness or after tack, overcomes the defects of hot sticking and poor handfeel of acrylic ester, has many available thickening agent categories, and easily mixes size.
Owner:SHANGHAI JAROS NEW MATERIAL +1
Preparation method of transition metal sulfide composite nanometer material
InactiveCN108975416ACore-shell structureLarge specific surface areaMaterial nanotechnologyHybrid capacitor electrodesPollutionMethanol
The invention discloses a preparation method of a transition metal sulfide composite nanometer material and belongs to the technical field of preparation of transition metal sulfides. The preparationmethod comprises the following steps of dissolving cobalt nitrate hexahydrate and 2-methylimidazole into methanol, performing stirring at a room temperature, performing still standing on an obtained solution for 12-36h at the room temperature, and preparing an ZIF-67 precursor; dissolving the cobalt nitrate hexahydrate and the ZIF-67 precursor into ethanol, performing dispersion, and performing stirring at the room temperature to form an Ni-Co-LDH intermediate; dispersing the intermediate in deionized water, adding a sulfur source and a molybdenum source, performing full stirring, transferringa mixture into a reaction kettle, adopting a hydrothermal method to perform stepwise temperature rising on the intermediate, then collecting a product through centrifugal washing, and drying at a certain temperature to obtain an NiCo2S4@MoS2 nanometer material. The preparation method provided by the invention is simple and green without pollution and is high in practical degree; and the obtainedNiCo2S4@MoS2 nanometer material can be directly used as an electrode material for a supercapacitor.
Owner:DALIAN UNIV OF TECH
Method for preparing magnetic metal-metal core-shell nano particles
The invention discloses a method for preparing magnetic metal-metal core-shell nano particles, which relates to metal nano particles. The method comprises: dissolving chloroauric acid and triphenylphosphine in ethanol respectively, filtering, cleaning, drying, obtaining an organic compound formed by gold and triphenylphosphine, mixing the organic compound with alkylamine, obtaining solution A, mixing an organic solvent A with a noble metal salt, adding mixed solution A, rising the temperature to perform a reaction, cooling and obtaining magnetic metal nano particles; dissolving the obtained organic compound formed by gold and triphenylphosphine in an organic solvent B, injecting obtained magnetic metal nano particles, keeping the temperature between 120 and 160 DEG C for 20 minutes to 1 hour, reducing to obtain gold and wrapping gold on the formed magnetic metal nano particles and obtaining nano particles in which gold and magnetic metal are in a core-shell structure; and washing the nano particles in which gold and magnetic metal are in a core-shell structure, performing centrifugal separation, drying and obtaining powder product, namely magnetic metal-gold core-shell nano particles.
Owner:XIAMEN UNIV
Nickel-zinc ferrite/polyacrylic acid nano-composite material and preparation method thereof
ActiveCN105161246ACore-shell structureObvious hysteresisInorganic material magnetismOrganic/organic-metallic materials magnetismNano compositesNickel-zinc ferrite
The invention discloses a nickel-zinc ferrite / polyacrylic acid nano-composite material and a preparation method thereof. The nano-composite material is in a core-shell structure and comprises core nickel-zinc ferrite and shell polyacrylic acid; the shell polyacrylic acid coats the nickel-zinc ferrite; and the nano-composite material is represented by Ni0.1-1Zn0.1-1Fe1-3O2-6 / PAA. The preparation method of the nano-composite material mainly comprises the following steps: (1) weighing zinc sulfate, ferrous sulfate and nickel sulfate to prepare a metal salt solution, adding the metal salt solution into an ammonium oxalate solution; (2) adjusting the pH of the mixed solution, and separating and drying the mixed solution to obtain a ferrite precursor; (3) burning the ferrite precursor to obtain the nickel-zinc ferrite; and (4) mixing and reacting the nickel-zinc ferrite and acrylic acid, and separating and drying the mixture to obtain the nickel-zinc ferrite / polyacrylic acid nano-composite material. The nickel-zinc ferrite / polyacrylic acid nano-composite material has the advantages of low specific saturated magnetic field intensity, relatively low coercive force and relatively high soft magnetic property; and the preparation method disclosed by the invention is simple, feasible and low in cost.
Owner:YANCHENG INST OF TECH
Synthesis method of SrTiO3 heterogeneously coated BaTiO3 ultrafine nano-powder
ActiveCN105948735AEffective dopingHigh dielectric constantMaterial nanotechnologyHeterojunctionSynthesis methods
The invention discloses a synthesis method of SrTiO3 heterogeneously coated BaTiO3 ultrafine nano-powder. According to the invention, BaTiO3 nano-particles are synthesized with a sol precipitation method; SrTiO3 is subjected to secondary nucleation with a hydrothermal method, such that a coating layer is formed; and the SrTiO3 heterogeneously coated BaTiO3 ultrafine nano-powder is synthesized. With the method provided by the invention, the synthesized nano-particles have small particle size, good dispersion and a significant core-shell structure. Also, because BaTiO3 and SrTiO3 have different interplanar spacings, the two are subjected to lattice distortion at contact interface layers, such that the dielectric constant and piezoelectric constant of BaTiO3 are improved. With the change of the doping amount of Sr, the interplanar spacings of heterojunction show a regular change.
Owner:SHANDONG UNIV
Core-shell type acrylate emulsion and preparation method thereof
The invention discloses a core-shell type acrylate emulsion and a preparation method thereof. The core-shell type acrylate emulsion is prepared by using methyl methacrylate (MMA) and ethyl acrylate (BA) as mixing monomers, modifying by using methylacryloyl oxygen propyl triethoxy silane (KH570) and by using a semi-continuous emulsion polymerization method. The prepared acrylic ester has better water resistence.
Owner:广东蓝羽新材料科技有限公司
Preparation method of molybdenum oxide/ molybdenum disulfide core-shell microspheres
ActiveCN109745929ARealize controllable preparationControllablePhysical/chemical process catalystsMicroballoon preparationAir atmosphereMicrosphere
The invention relates to a preparation method of molybdenum oxide / molybdenum disulfide core-shell microspheres, and belongs to the technical field of nanometer composite materials. The method comprises the following steps: (1) feeding a molybdenum source into a tubular furnace; oxidizing and roasting under high temperature in an air atmosphere to obtain molybdenum oxide particles; (2) adding ureaand a sulfur source into ethyl alcohol; stirring until the solution is clear; then adding the molybdenum oxide particles; ultrasonically and uniformly stirring; and transferring into a water heatingreaction chamber; and (3) centrifuging the reacted product; washing; and drying in vacuum to obtain the molybdenum oxide / molybdenum disulfide core-shell microspheres. The method is simple in synthesizing line and easy to operate; additional sacrifice templates and catalysts are avoided; meanwhile, the prepared microspheres are regular in appearance, and uniform in size, and are independently scattered without agglomerating; and the microspheres can be widely applied to the fields of catalyzing, batteries, capacitors and lubrication.
Owner:JIANGNAN UNIV
Nanosilicon dioxide pellet and preparing method thereof
ActiveCN106430222AUniform particle size distributionShell thickness controllableSilicaMicroballoon preparationComposite pelletBiocompatibility Testing
The invention discloses a nanosilicon dioxide pellet. The nanosilicon dioxide pellet comprises a silicon dioxide shell body and a polymer nuclear body which is wrapped inside the silicon dioxide shell body. The grain size of the silicon dioxide shell body is 50-1000 nm and the shell thickness of the silicon dioxide shell body is 5-75 nm. The nanosilicon dioxide pellet has a uniform size distribution, a controllable pellet size, shell thickness and cavity rate and good biocompatibility; in addition, the nanosilicon dioxide pellet has good heat stability, a high mechanical property and very good water dispersibility. The invention also discloses a preparing method of the nanosilicon dioxide pellet. The preparing method is a soap-free emulsion polymerization method and is simple to operate; a nano composite pellet with a nuclear shell structure can be synthesized in a large scale, that is, the polymer nuclear body and the silicon dioxide shell body can be formed at the same time; meanwhile, the preparing process is simple and efficient, and the product yield and the product purity are high, and thus the cost is reduced sharply.
Owner:宁波特粒科技有限公司
Acrylic emulsion with self-crosslinked core-shell structure, and preparation method of acrylic emulsion
ActiveCN106977654AGood compatibilityImprove stabilityFireproof paintsAnti-corrosive paintsFunctional monomerPolymer science
The invention relates to an acrylic emulsion with a self-crosslinked core-shell structure, and a preparation method of the acrylic emulsion. The preparation method comprises the following steps: compounding acrylic hard monomers and acrylic soft monomers, adding functional monomers such as vinylidene, phosphate monomers and organic fluorine active monomers, adding self-crosslinked monomers to obtain the acrylic emulsion with the self-crosslinked core-shell structure by using an emulsion polymerization method under the special emulsifier combination. Through core-shell interpenetration technology and special raw material matching, the emulsion has good water resistance and corrosion resistance performances, is high in adhesion force, has excellent comprehensive performance, and can be directly coated into maintenance engineering of various steel structure members and mechanical equipment, and the like, thus having wide application prospects.
Owner:HUIZHOU CITY HUIYANG DISTRICT JIATAI PAINT CO LTD
Method for preparing SiC whiskers through interface reaction, and SiC whiskers
InactiveCN110387583AImprove adsorption capacitySynthesis fastPolycrystalline material growthFrom solid stateMicrowave effectSilicon dioxide
The invention relates to a method for preparing SiC whiskers through an interface reaction, and the SiC whiskers, and belongs to the technical field of preparation of high-performance ceramic materials. The method for preparing the SiC whiskers through the interface reaction comprises the following steps: (1) according to the situation that the molar ratio of carbon to silicon is (1.5 to 3):1, a silicon source and a carbon source are taken to be mixed with boric acid to prepare a silicon dioxide-carbon-boric acid precursor, wherein the silicon source is silicate ester or silicon dioxide, and the carbon source is activated carbon or coal; and (2) the obtained silicon dioxide-carbon-boric acid precursor is pressed into a sheet and then buried in quartz sand to be subjected to microwave sintering, then the surface wrapped quartz sand is removed, then washing is conducted through hydrofluoric acid, and the SiC whiskers are obtained. According to the method, the adsorption property of the activated carbon can be fully utilized to form a good nuclear shell structure, the boric acid is adopted to adjust the pH of the precursor, a reaction can be accelerated through B2O3, and the couplingheat effect of microwave sintering can be fully utilized through the microwave effect to achieve rapid synthesis of the SiC whiskers.
Owner:ZHENGZHOU UNIVERSITY OF AERONAUTICS
Oral colon-targeted lycopene nano-liposome and preparation method thereof
InactiveCN111317827ASmall particle sizeCore-shell structureHydrocarbon active ingredientsAntipyreticLycoperseneColon parts
The invention relates to the technical field of pharmaceutics, and specifically relates to an oral colon-targeted lycopene nano-liposome and a preparation method thereof. The nano-liposome consists ofa liposome core and a modified layer shell; the liposome core is the lycopene-loaded liposome with negative charge prepared by adopting an ether injection method; and the modified layer shell is formed by a colon-specific degradation material. Compared with conventional lipids, the stability of the obtained nano-liposome in gastrointestinal tracts can be greatly enhanced; and the nano-liposome has obvious colon-targeted release effects and can obviously enhance the repair efficiency of colon parts, and the average particle size is about 560 nm.
Owner:JIANGXI SCI & TECH NORMAL UNIV
Microfluidic spinning device, linear core-shell structure conductive fiber and preparation method and application of linear core-shell structure conductive fiber
InactiveCN112481721AEasy accessLow costFilament/thread formingConjugated synthetic polymer artificial filamentsFiberThermal stimulation
The invention discloses a microfluidic spinning device, a linear core-shell structure conductive fiber and a preparation method and application of the linear core-shell structure conductive fiber. Thepreparation method is based on a co-flow microfluidic spinning device, a shell layer solution and a core layer solution are correspondingly guided into an inner-phase capillary tube and an intermediate-phase capillary tube, a core-shell structure fiber precursor in a laminar flow state is obtained, and then the fiber precursor is rapidly cured by using an external-phase curing solution, so that the core-shell structure of the fiber is smoothly maintained; the wall thickness of the fiber is precisely adjusted by adjusting the flow velocity of each phase of the fiber, so that the morphology ofthe conductive fiber is regulated, and the preparation process is simple, low in cost and suitable for large-scale production; and according to the linear core-shell structure conductive fiber, an MXene aqueous solution is used as a core layer, a shrinkable alginate hydrogel material with good biocompatibility is used as a sheath layer, and the fiber has excellent conductive performance and photo-thermal shrinkage performance while a good core-shell structure is ensured, so that the linear core-shell structure conductive fiber is applied to a flexible electronic device which responds to external photo-thermal stimulation.
Owner:NANJING DRUM TOWER HOSPITAL
Preparation method of pH sensitive multistage polymer composite nanospheres
The invention provides a preparation method of pH sensitive multistage polymer composite nanospheres and belongs to the technical field of functional polymer materials. The preparation method comprises the steps of adding 4-vinylpyridine to an HCl aqueous solution at 75 DEG C and then adding deionized water, keeping a temperature constant for 10min so that the 4-vinylpyridine is dissolved, removing oxygen by blowing nitrogen, next, adding styrene, stirring, and increasing the temperature to 75 DEG C to obtain a mixed solution A, next, dissolving potassium peroxodisulfate in deionized water, ultrasonically shaking, and after the temperature of the reaction system is constant at 75 DEG C, adding the mixed solution A for continuous reaction to obtain core-shell structured polymer nanospheres, dissolving the emulsion of the polymer nanospheres in HCl solutions different in pH value, and stirring to obtain the pH sensitive multistage polymer composite nanospheres. The preparation method is simple and does not need auxiliaries such as an emulsifier and a surfactant, and the obtained nanospheres are even in particle size and have obvious core-shell structure. When the change of pH is capable of resulting in assembling and disassembling, the pH sensitive multistage polymer composite nanospheres have extremely high application value.
Owner:XIAMEN UNIV
Preparation method of microencapsulated flame retardant
ActiveCN110396861ACore-shell structureImprove flame retardant performancePaper/cardboardIgnifugeants additionPolymer scienceChitosan hydrochloride
The invention belongs to the field of flame retardant materials, and particularly relates to a preparation method of a microencapsulated flame retardant. According to the method provided by the invention, chitosan hydrochloride is used as a capsule material, ammonium polyphosphate is used as a core material, the mass ratio of the chitosan hydrochloride to the ammonium polyphosphate is 3: 1, the ammonium polyphosphate is subjected to ultrasonic crushing and then is added into a chitosan hydrochloric acid solution, and the microencapsulated ammonium polyphosphate with flame retardance is prepared by a physical coating method. The prepared microcapsule can be applied to a paper sheet or a high polymer material so that the material can have good flame retardance. By the method which is relatively simple to operate, the microencapsulated flame retardant with good flame retardance is prepared, and has important significance.
Owner:TIANJIN UNIV OF SCI & TECH
Magnetic core-shell mesoporous surface molecular imprinting composite nano material and preparation method thereof
ActiveCN112808256ACore-shell structureGood superparamagneticOther chemical processesAlkali metal oxides/hydroxidesMass Spectrometry-Mass SpectrometrySolid phase extraction
The invention relates to a magnetic core-shell mesoporous surface molecularly imprinted composite nano material and a preparation method thereof, and belongs to the technical field of molecularly imprinted polymers. The material is black powder, the average particle size of powder particles is 200-300 nm, the specific surface area is 327.6 cm<2> / g, and the saturation magnetization is 54.9 emu / g. The preparation method comprises the following steps: synthesizing double-layer silicon dioxide coated magnetic core-shell mesoporous nano composite particles as a carrier through an improved Stober method, bonding amino groups on the carrier, taking diisononyl phthalate as a virtual template, and preparing a novel magnetic core-shell mesoporous surface molecularly imprinted composite nano material through a surface molecular imprinting technology; a matrix dispersion-magnetic solid phase extraction-gas chromatography-mass spectrometry method established on the basis that the material disclosed by the invention is a magnetic solid phase extraction agent is used for detecting phthalic acid ester substances, and the method is low in detection limit, high in precision and suitable for detecting trace phthalic acid ester in liquid drinks such as water, wine and drinks.
Owner:合肥海关技术中心
Method for preparing two-phase catalytic micro-reactor
InactiveCN101711968BEasy to prepareSimple and fast operationChemical/physical/physico-chemical processesMicroballoon preparationMicroreactorMicrosphere
The invention relates to a method for preparing a two-phase catalytic micro-reactor. The method comprises the following steps of: preparing a template oil phase; preparing an emulsion; preparing a water phase; preparing micro-gel; preparing PM / AEM composite microspheres; and preparing a PM / AEM / C micro-reactor. Compared with the conventional method for preparing the two-phase catalytic micro-reactor, the method of the invention is simple and convenient to operate. The obtained micro-reactor has a remarkable core-shell structure, rational design and high stability, and is easy to separate and recover. As an independent and complete catalytic reaction space unit, the micro-reactor can be recycled and is widely applied in the field of two-phase catalytic reaction.
Owner:XIAN UNVERSITY OF ARTS & SCI
Phospholipid hybrid polymer micelle capable of being co-loaded with immunologic adjuvant and indocyanine green and having targeting effect, and preparation method and application of phospholipid hybrid polymer micelle
ActiveCN113368047ACore-shell structureSmall particle sizeInorganic active ingredientsPhotodynamic therapyArgininePhospholipid
The invention discloses a phospholipid hybrid polymer micelle capable of being co-loaded with immunologic adjuvant and indocyanine green and having a targeting effect, and a preparation method and application of the phospholipid hybrid polymer micelle. The method comprises the following steps of: dissolving PCL-s-PEG-s-PCL, hydrophobic ICG, DSPE-PEG-COOH, MnO2, NLG919 and a TLR4 agonist in an organic solvent, performing ultrasonic treatment, removing an organic solvent, and forming a layer of uniform thin film; drying the thin film, and carrying out hydration, ultrasonic treatment and dialysis in sequence to obtain a nanoparticle micelle solution; and activating carboxyl groups on the surfaces of the nanoparticle micelles in the nanoparticle micelle solution, adding NH2-RGD into the nanoparticle micelle solution for incubation, and dialyzing to obtain the phospholipid hybrid polymer micelle capable of being co-loaded with the immunologic adjuvants (NLG919 and MPLA) and the indocyanine green and having the targeting effect. According to the method, hydrophobic drugs (ICG and NLG919) are effectively wrapped in an inner cavity, an immune agonist is embedded into a phospholipid layer, and aminated polypeptide arginine-glycine-aspartic acid is modified on the surface of a carrier, and therefore, the nano-drug carrier effectively aiming at phototherapy and immunotherapy of malignant tumors is formed.
Owner:INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI
Tin dioxide-zinc stannate core-shell nano-wires and preparation method
InactiveCN109382087AHigh crystallinityCore-shell structureMaterial nanotechnologyChemical vapor deposition coatingTin dioxideNanowire
The invention discloses tin dioxide-zinc stannate core-shell nano-wires and a preparation method. The preparation method comprises the following steps: first, mixing SnO2 powder and graphite powder inthe molar ratio of 1:4, grinding uniformly to obtain SnO2+C powder, mixing ZnO powder and graphite powder in the molar ratio of 1:1, and grinding uniformly to obtain ZnO+C powder; second, after a substrate is plated with a gold film, placing the substrate in a depositing area, heating to 918 DEG C, placing the SnO2+C powder in a vapour depositing system high-temperature area, heating to 980 DEG C, and growing SnO2 nano-wires on the substrate through vapour deposition; third, placing the ZnO+C powder in the vapour depositing system high-temperature area, growing a Zn2SnO4 shell layer on the substrate through the vapour deposition, and cooling to obtain a target product; the SnO2-Zn2SnO4 core-shell nano-wires has uniform core-shell structures and uniform contrast; the interfaces and the outer surfaces are smooth and flat, and have an extremely good epitaxial relationship; the preparation method is simple and is convenient to maintain.
Owner:SOUTHWEST JIAOTONG UNIV
A method for mass-preparing platinum-based dealloyed electrocatalysts for fuel cell cathodes
Owner:BEIJING UNIV OF CHEM TECH
Flower-cluster-shaped Fe3O4@MnO2 as well as preparation method and application thereof
ActiveCN111495385ACore-shell structureComplete shapeCatalyst activation/preparationWater/sewage treatmentCarbon layerPtru catalyst
The invention relates to the technical field of environment-friendly catalysts, in particular to flower-cluster-shaped Fe3O4@MnO2 as well as a preparation method and application thereof. According tothe method, ferroferric oxide is used as a precursor and potassium permanganate and absolute ethyl alcohol are used as raw materials, so that flower-cluster-shaped Fe3O4@MnO2 is directly synthesized through a hydrothermal method. According to the preparation method, the absolute ethyl alcohol, which is used as a carbon source, and potassium permanganate are subjected to a redox reaction to generate manganese dioxide, and meanwhile hierarchical manganese dioxide nanosheets are generated, wherein the product has complete appearance and uniform size; the surface of the ferroferric oxide core doesnot need to be coated with a carbon layer in advance, a product with an obvious core-shell structure is synthesized, and the synthesis process is effectively simplified.
Owner:SHANDONG NORMAL UNIV
A method for directly preparing alumina-coated ferrite by high-pressure ultrasonic spray pyrolysis
ActiveCN109448979BThickness is easy to controlGood coating integrityInorganic material magnetismInductances/transformers/magnets manufactureThermal decomposition methodTube furnace
Owner:广州金意新材料有限公司
Method for preparing magnetic metal-metal core-shell nano particles
The invention discloses a method for preparing magnetic metal-metal core-shell nano particles, which relates to metal nano particles. The method comprises: dissolving chloroauric acid and triphenylphosphine in ethanol respectively, filtering, cleaning, drying, obtaining an organic compound formed by gold and triphenylphosphine, mixing the organic compound with alkylamine, obtaining solution A, mixing an organic solvent A with a noble metal salt, adding mixed solution A, rising the temperature to perform a reaction, cooling and obtaining magnetic metal nano particles; dissolving the obtained organic compound formed by gold and triphenylphosphine in an organic solvent B, injecting obtained magnetic metal nano particles, keeping the temperature between 120 and 160 DEG C for 20 minutes to 1 hour, reducing to obtain gold and wrapping gold on the formed magnetic metal nano particles and obtaining nano particles in which gold and magnetic metal are in a core-shell structure; and washing the nano particles in which gold and magnetic metal are in a core-shell structure, performing centrifugal separation, drying and obtaining powder product, namely magnetic metal-gold core-shell nano particles.
Owner:XIAMEN UNIV
Core-shell structure high-thermal-conductivity wear-resistant composite valve guide pipe and manufacturing process thereof
PendingCN113732291ALower working temperatureEasy to pressMachines/enginesLift valveWear resistanceValve guide
The invention discloses a core-shell structure high-thermal-conductivity wear-resistant composite valve guide pipe and a manufacturing process thereof, and relates to the technical field of powder metallurgy of automobile parts. A core is made of an iron-based alloy powder metallurgy material with better wear resistance, an inner hole contains lubricating oil, and the core shows excellent wear-resistant and self-lubricating properties when being in contact with a valve, a shell is made of high-heat-conduction red copper, heat of the core is efficiently conducted to a cylinder cover for heat dissipation, the actual working temperature of the core is reduced, the abrasion environment is optimized, meanwhile, the good ductility of the red copper is more beneficial to pressing a valve guide pipe into the cylinder cover, the cost advantage is obvious, and the requirement for improving the performance of an engine can be met.
Owner:安庆帝伯粉末冶金有限公司
A kind of nickel-zinc ferrite/polyacrylic acid nanocomposite material and preparation method thereof
ActiveCN105161246BCore-shell structureObvious hysteresisInorganic material magnetismOrganic/organic-metallic materials magnetismNano compositesNickel-zinc ferrite
Owner:YANCHENG INST OF TECH
A kind of nano silicon dioxide microsphere and preparation method thereof
ActiveCN106430222BCore-shell structureImproved particle size distributionSilicaMicroballoon preparationMicrosphereBiocompatibility Testing
The invention discloses a nanosilicon dioxide pellet. The nanosilicon dioxide pellet comprises a silicon dioxide shell body and a polymer nuclear body which is wrapped inside the silicon dioxide shell body. The grain size of the silicon dioxide shell body is 50-1000 nm and the shell thickness of the silicon dioxide shell body is 5-75 nm. The nanosilicon dioxide pellet has a uniform size distribution, a controllable pellet size, shell thickness and cavity rate and good biocompatibility; in addition, the nanosilicon dioxide pellet has good heat stability, a high mechanical property and very good water dispersibility. The invention also discloses a preparing method of the nanosilicon dioxide pellet. The preparing method is a soap-free emulsion polymerization method and is simple to operate; a nano composite pellet with a nuclear shell structure can be synthesized in a large scale, that is, the polymer nuclear body and the silicon dioxide shell body can be formed at the same time; meanwhile, the preparing process is simple and efficient, and the product yield and the product purity are high, and thus the cost is reduced sharply.
Owner:宁波特粒科技有限公司
Submicron nucleocapsid microsphere material capable of releasing active factors on time and preparation method of submicron nucleocapsid microsphere material
The invention relates to a submicron nucleocapsid microsphere material capable of releasing active factors on time and a preparation method of the submicron nucleocapsid microsphere material, and solves the technical problems that a conventional size effect can hardly meet clinical conversion applications based on a bone defect repair with a support material, and the ideal time-sequence cooperation of bone-formation and vessel-formation still cannot be acquired. The submicron nucleocapsid microsphere material is provided with a nuclear layer and a shell layer, wherein the nuclear layer is made of poly-dl-lactic acid, and morphogenetic protein are carried on the poly-dl-lactic acid; the shell layer is made of polylactide-glycolide, and vascular endothelial growth factors are carried on the polylactide-glycolide; the diameter mu of the microsphere material ranges from 0.4 [mu]m to 1.6 [mu]m. The invention provides the preparation method of the submicron nucleocapsid microsphere material capable of releasing the active factors on time, and can be widely used for the preparation field of the repair materials for bone defect and bone deficiency.
Owner:PEKING UNIV SCHOOL OF STOMATOLOGY +1
a fe 3 o 4 @Hemoglobin core-shell structure material, preparation method and application
Owner:JINLING INST OF TECH
Process for preparing magnetic composite microball of monomer synthesizing biological degradable polyester kind
InactiveCN100347218CSmall particle sizeNarrow distributionPharmaceutical non-active ingredientsPolyesterOrganic solvent
The invention discloses a manufacture method for magnetic compounding microballons that is covered by biology degradation polyester and uses magnetic Fe3O4. The feature is that it dispersing the cyclic ester class monomer, initiator and magnetic powder in organic solvent, using the active radical (-O-H, -NH2 and so on) coupling on the particle surface of nm Fe3O4 to take open loop polymerization on the magnetic particle surface of cyclic ester, the polyester magnetic compounding microballons that is covered with magnetic Fe3O4 to form core shell structure. The diameter of the invention could be controlled to 200-700 nm. It has high magnetic content, strong magnetic response, and stable microballons. The invention has widely application value in biology chemical field.
Owner:TONGJI UNIV
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com