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36results about How to "Rapid separation and enrichment" patented technology
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Magnetic carbon nanotube composite material and preparation method and application thereof
InactiveCN103041773AImprove bindingEasy to separateIon-exchange process apparatusComponent separationSorbentHexamethylenediamine
The invention discloses a magnetic carbon nanotube composite material and a preparation method and an application thereof. The preparation method comprises the following steps: adding FeCl3.6H2O to an ethylene glycol solution; then adding anhydrous sodium acetate and polyethylene glycol; adding a carboxylated multiwalled carbon nanotube; performing ultrasonic dispersion; adding hexamethylenediamine or ethanediamine; heating to 200-300 DEG C for reaction for 8-24h; and washing and performing vacuum drying to prepare the amino-modified magnetic Fe3O4-carbon nanotube composite material. The amino-modified magnetic Fe3O4-carbon nanotube composite material prepared by the invention is of nanoscale and superparamagnetism, can be stably dispersed in solutions, and can be quickly separated and enriched through a simple action of a magnetic field. As an adsorbent, the material is large in superficial area and has various active groups on the surface. The material can adsorb pigments from complex substrates through pi-pi electron interaction and hydrophobic effect of the carbon nanotube and can adsorb compounds such as organic acids and phenols through weak anion exchange effect of amino groups on the surfaces of magnetic nanoparticles.
Owner:TIANJIN UNIV
Cell separating micro-structural system
InactiveCN104073428ASimple separation and enrichmentRapid separation and enrichmentBioreactor/fermenter combinationsBiological substance pretreatmentsEngineeringCell separation
The invention relates to the technical field of biological and medical in vitro detection, and discloses a cell separating micro-structural system. The cell separating micro-structural system comprises a microfluidic chip, wherein the microfluidic chip comprises a sample inlet, a sample outlet, a cell capturing region, a side flushing inlet, a recycling outlet and a cleaning inlet; a plurality of microcolumns are formed inside the cell capturing region to form a microcolumn array; the microcolumn array is distributed in a gradient manner, thus showing microcolumn distance gradient change and microcolumn dimension gradient change; each layer of the microcolumn array is distributed in the form of a regular trapezoid gradually dispersing from the top layer to the bottom layer; the horizontal cross section shape of each microcolumn is divided into an upper part and a lower part; the upper part close to the sample inlet is similar to a normal isosceles triangle, wherein the two isosceles sides are in an symmetrical inner-concave circular arc shape; and the lower part close to the sample outlet is in an inverted isosceles triangle shape. The cell separating micro-structural system disclosed by the invention is used for separating, gathering, counting and recycling CTC or UETC, wherein detecting efficiency exceeds 90%; and moreover, damages of the microcolumn array on captured cells when a fluid impacts the captured cells are lowered.
Owner:PEKING UNIV
Preparation method for molecular imprinting material and molecular imprinting material prepared through preparation method
InactiveCN105107482AGood biocompatibilityImprove antioxidant capacityOther chemical processesAlkali metal oxides/hydroxidesSolubilityFunctional monomer
The invention provides a preparation method for a molecular imprinting material and the molecular imprinting material prepared through the preparation method. The preparation method comprises the steps that silicon oxide is coated on the surfaces of magnetic ferroferric oxide nanometer particles, the magnetic ferroferric oxide nanometer particles are modified with gamma-(methacryloyl chloride) amino propyl trimethoxy silane to obtain magnetic ferroferric oxide nanometer particles with propenyl on the surfaces, the magnetic ferroferric oxide nanometer particles with the propenyl on the surfaces serve as carriers, estrogen receptors are simulated, functional monomers are optimized, a surface imprinting technology is adopted, and then the molecular imprinting material which can simultaneously identify seven kinds of environmental endocrine disrupting chemicals is prepared. According to the preparation method, the easy separation of a magnetic nanometer material, the good water solubility of a silicon oxide nanometer material, the specific recognition ability of molecular imprinting polymers and the surface imprinting technology are mutually combined, the preparation technology is simple, the conditions are mild, the prepared molecular imprinting material is large in adsorption capacity, fast to respond, high in magnetism, good in chemical stability and high in repeating utilization rate, and the problems that at present, multiple trace, steroid and phenol environmental endocrine disrupting chemicals are difficult to simultaneously identify, separate and enrich are solved.
Owner:INST OF QUALITY STANDARD & TESTING TECH FOR AGRO PROD OF CAAS
Preparation method of magnetic carbon nanotube with polydopamine-modified surface
ActiveCN104072762ASuperparamagneticRapid separation and enrichmentBiocompatibility TestingMagnetite Nanoparticles
The invention discloses a preparation method of a magnetic carbon nanotube with polydopamine-modified surface, belonging to the field of nanomaterial preparation. The method comprises the following steps: synthesizing magnetic nanoparticles by adopting a solvothermal method; adding the magnetic nanoparticles and a carbon nanotube into ethanediol according to a certain ratio, stirring and ultrasonically processing to obtain a uniform solution, and performing solvothermal reaction on the solution to obtain the magnetic carbon nanotube; dissolving the obtained magnetic carbon nanotube and dopamine in Tris-HCl buffer liquid according to a certain ratio, and polymerizing for a certain time to obtain the magnetic carbon nanotube with the polydopamine-modified surface. The magnetic carbon nanotube prepared by adopting the method has ultrastrong mechanical property of the carbon nanotube, the characteristics of nanometer size effect, relatively good biocompatibility, magnetic responsibility and the like of the magnetic particles and the characteristics of hydrophilicity, structural stability and a secondary reaction platform of dopamine, and can be widely applied in the fields of biology such as protein separation, drug delivery and biological marking.
Owner:XI AN JIAOTONG UNIV
Magnetic molecularly imprinted polymer for separating atrazine, and preparation method for magnetic molecularly imprinted polymer
The invention discloses a method for preparing a magnetic molecularly imprinted polymer for separating atrazine. The method comprises the following steps of: 1) activating Fe3O4atSiO2 particles, and performing surface modification by using a silane coupling agent to obtain composite magnetic nano-particles; and 2) adding the atrazine and methacrylic acid into an organic solvent and preassembling,adding the composite magnetic nano-particles, a crosslinking agent and an initiator, performing polymerization reaction at the temperature of between 60 and 70 DEG for 20 to 24h in an anaerobic environment, and removing the atrazine to obtain the magnetic molecularly imprinted polymer. The method is easy to operate and is suitable for large-scale production; the time consumption is low; raw materials are cheap and readily available; and membrane materials with micron-scale and nano-scale diameters can be obtained. The invention also provides the magnetic molecularly imprinted polymer preparedby the method. Magnetic molecules are firmly combined, and the magnetic molecularly imprinted polymer is high in stability and has stronger adsorption capacity when separating the atrazine.
Owner:JIAXING UNIV
Ionic liquid polymer grafted magnetic carbon nanotube and preparation method thereof
The invention discloses a preparation method of an ionic liquid polymer grafted magnetic carbon nanotube. The method comprises the following steps: reacting halogenated hydrocarbon with 1-vinyl imidazole to synthesize an ionic liquid for later use, carrying out acidifying oxidation treatment on an original carbon nanotube by using concentrated sulfuric acid and concentrated nitric acid, and reacting the obtained carbon nanotube with thionyl chloride and ethylene glycol to obtain a hydroxylated carbon nanotube; loading an initiator bromoisobutyryl bromide to the surface of the hydroxylated carbon nanotube, and initiating polymerization of the ionic liquid on the surface of the carbon nanotube; and carrying out one-step simple ion exchange to introduce magnetic anions in order to synthesize the novel magnetic carbon nanotube. The magnetic carbon nanotube prepared in the invention has nanometer dimension and strong magnetism, and can be rapidly separated and enriched through simple magnetic field action.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Magnetic material for surface finish benzene sulfonic acid, and preparation method and application thereof
InactiveCN103065754ASimple manufacturing methodSuperparamagneticInorganic material magnetismPeptide preparation methodsSodium acetateMicrosphere
The invention discloses a preparation method and application of a magnetic material for surface finish benzene sulfonic acid. The preparation method comprises the steps of adopting FeCl3 as a raw material, enabling ethylene glycol to serve as a disperse system, enabling anhydrous sodium acetate to serve as a reducing agent, and utilizing a hydrothermal method to prepare ferroferric oxide magnetic microspheres; then dispersing the ferroferric oxide magnetic microspheres into ethanol / water mixed solution, adding ammonia water and tetraethoxy-silicane, enabling tetraethoxy-silicane to undergo hydrolytic polymerization on the surfaces of the magnetic microspheres, and obtaining an core-shell magnetic material; dispersing the core-shell magnetic material to mixed solution of toluene and N,N-dimethylformamide after drying, adding 2-(4-chloride sulfonyl phenyl)-ethyl trimethoxy silane, and obtaining the magnetic material for surface finish benzene sulfonic acid by a silanization reaction. The magnetic material has rich active groups, can be dispersed stably in solution, is renewable and can be recycled. The magnetic material serves as an adsorbent, is large in surface area and strong in selectivity, weakly alkaline compounds can be adsorbed from a matrix by strong electrostatic interaction of sulfo groups and hydrophobic interaction of a benzene ring, and rapid separation and enrichment can be achieved by simple magnetic field effect.
Owner:TIANJIN UNIV
Immune nanometer cellulose magnetic liposome and preparation method thereof
ActiveCN103961703AImprove stabilityReduce reunionInorganic non-active ingredientsAntibody ingredientsAntigenCells isolation
The invention belongs to the technical field of nanometer magnetic materials used for biology, relates to a nanometer magnetic particle, particularly to an immune nanometer cellulose magnetic liposome and a preparation method thereof. The immune nanometer cellulose magnetic liposome adopts a core-shell structure; the inner core adopts a magnetic material, Fe3O4; a middle layer adopts the mixed material of the liposome and the nanometer cellulose; an outermost layer adopts an antibody wrapping the middle layer; the quality content of the nanometer cellulose is 0.1%-50%; the quality content of the liposome composition is 0.5%-90%; the quality content of the magnetic material is 0.1%-50%. The immune nanometer cellulose magnetic liposome provided by the invention is excellent in biocompatibility; through coupling with the aglucon inside the bioactive substance, the immune nanometer cellulose magnetic liposome can identify and be combined with corresponding antigen, antibody or nucleic acid and the like, so as to rapidly conduct separation and enrichment in an external magnetic field; the immune nanometer cellulose magnetic liposome can be used for detection, separation and purification of biomaterial and has a broad application prospect in biological areas of cell separation, immobilized enzyme, targeted drug, immune detection and the like.
Owner:上海裕隆医学检验所股份有限公司
Preparation and application of di(2-ethyl hexyl) phthalate surface molecular imprinting magnetic nanometer material
ActiveCN105498728AEasy to makeMake fastComponent separationOther chemical processesPolyethylene glycolEthyl group
The invention relates to preparation and application of a di(2-ethyl hexyl) phthalate surface molecular imprinting magnetic nanometer material, and belongs to the technical field of nanometer materials. The preparation method includes the steps of conducting ultrasonic stirring under protection of N2, adding a polyethylene glycol solution to a mixed solution of Fe(NO3)3 and FeSO4, regulating pH, separating out flocculent magnetic fluid through a magnet, dispersing the flocculent magnetic fluid in ethyl alcohol, evenly mixing the mixture with an acetone solution of tetraethyl orthosilicate, and adding strong ammonia water to form black gel; obtaining an Fe3O4-SiO2 material after ageing and drying are conducted on the gel; dissolving DEHP and phenyl trimethoxy silane in methyl alcohol, adding the activated Fe3O4-SiO2 material, tetraethyl orthosilicate and acetic acid after oscillation, and conducting stirring at the room temperature; obtaining the DEHP imprinting magnetic nanometer material after trichloromethane washing, magnetic separation and vacuum drying, wherein the average grain diameter is about 33 nm, and the saturation magnetization strength is 14.9 emu.g<-1>. When the material is added to an environment water sample or a beverage sample containing DEHP, DEHP can be efficiently enriched, the processing speed is high, and selectivity is good; the material can be repeatedly used.
Owner:GUANGDONG UNIV OF TECH
Enhanced magnetic adsorbent
ActiveCN112169773AImprove adsorption capacityAchieve reuseOther chemical processesSpecific water treatment objectivesMicrosphereUltraviolet lights
The invention discloses an enhanced magnetic adsorbent, which is prepared by the following steps: S1, adding Fe3O4 magnetic nanoparticles into an ethanol solution, carrying out ultrasonic dispersion,adding an ammonia water solution and distilled water, carrying out ultrasonic dispersion, and dropwisely adding TEOS to obtain Fe3O4@SiO2, S2, dissolving chitosan in acetic acid to obtain a chitosan solution, adding Fe3O4@SiO2 nanoparticles, stirring to obtain a suspension, dispersing the suspension in a mixed solution of cyclohexane and span80, and dropwise adding a glutaraldehyde solution to obtain a magnetic chitosan microsphere solution, and S3, adding an initiator VA-044, uniformly mixing, adding a cationic monomer, sealing, and initiating copolymerization under ultraviolet light to obtain the enhanced magnetic adsorbent. The adsorption performance of the chitosan magnetic microspheres can be improved, the chitosan magnetic microspheres can be repeatedly used, and the adsorption costis reduced.
Owner:CHONGQING UNIV
Preparation and application methods of tetracycline antibiotic multi-template molecularly imprinted magnetic composite material
InactiveCN112007621AGood specificitySuperparamagneticComponent separationOther chemical processesFunctional monomerMesoporous silica
The invention relates to preparation of a tetracycline antibiotic (tetracycline, oxytetracycline, aureomycin and doxycycline) multi-template molecularly imprinted magnetic composite material and application of the composite material in removal and detection of tetracycline antibiotics. After the surface of magnetic graphene oxide is coated with mesoporous silica, tetracycline, oxytetracycline, aureomycin and doxycycline are jointly used as template molecules, anilinomethyltriethoxysilane and N-[3-(trimethoxysilyl) propyl] ethylenediamine are jointly used as functional monomers, and a sol-gel method is adopted for surface molecular imprinting. The obtained tetracycline antibiotic multi-template molecularly imprinted magnetic composite material can be used for carrying out high-selectivity adsorption on tetracycline, oxytetracycline, aureomycin and doxycycline in a solution at the same time; the adsorption capacities are 5.9 mg / g, 5.7 mg / g, 19.5 mg / g and 11.9 mg / g respectively, adsorption equilibrium is achieved within 60 min, the adsorbent can be repeatedly used five times or more, and the material can be used for removing and detecting tetracycline antibiotics.
Owner:GUANGDONG UNIV OF TECH
Preparation method for magnetic nanoparticles with surface aldehyde group functionalization
ActiveCN103706320AEasy to prepareSuperparamagneticOther chemical processesMagnetic materialsSodium acetateMagnetite Nanoparticles
The invention discloses a preparation method for magnetic nanoparticles with surface aldehyde group functionalization. FeCl3.6H2O and anhydrous sodium acetate are dissolved in ethylene glycol, and a uniform and transparent mixed solution is prepared; The surface modification agent glutaraldehyde is added in the prepared mixed solution, after stirring and ultrasonic treatment, a uniform mixed solution is prepared; the prepared mixed solution is subjected to a solvothermal reaction in a high pressure reactor, after the reaction is over, the above mixture is cooled naturally to room temperature; In presence of an applied magnetic field, solid-state compounds are separated from the reaction products. The magnetic nanoparticles with surface aldehyde group functionalization have superparamagnetism, and can be dispersed in a solution steadily. Rapid separation and enrichment can be achieved by utilization of an applied magnetic field. The magnetic nanoparticles can be regenerated and used repeatedly, and has strong magnetism. Because of large specific surface area and surfaces with aldehyde group active groups, the magnetic nanoparticles can be used for separation of biomacromolecules and drug targeting delivery and adsorption.
Owner:XI AN JIAOTONG UNIV
L-glutamic acid terminated polypeptide MIP (molecular imprinting polymer) magnetic microspheres as well as preparation method and application thereof
ActiveCN110590997AOvercoming slow mass transferOvercome timeIon-exchange process apparatusOther chemical processesFunctional monomerMicrosphere
The invention relates to L-glutamic acid terminated polypeptide MIP (molecular imprinting polymer) magnetic microspheres as well as a preparation method thereof. The preparation method comprises stepsas follows: a multifunctional magnetic CuFeMnO4 nano affine material is synthesized with a hydrothermal method, the strong coordination effect of Cu<2+> and Fe<3+> in the affine material with carboxyl and amino in polypeptide is used, the affine material serves as a carrier, alternative template molecules, functional monomers, an RAFT reagent, a crosslinking agent and an initiator are added to awater-phase system, molecular imprinting is performed on the surface of the CuFeMnO4 nano material with a one-step method, and MIPs@CuFeMnO4 microspheres are obtained after an RAFT polymerization reaction; and alternative template molecules embedded in the polymer are removed through elution, and the MIPs@CuFeMnO4 microspheres with MIP rigid identification holes are obtained. The MIPs@CuFeMnO4 magnetic affine nano-microspheres prepared with the method have the advantages of uniform surface coating, narrower imprinting polymer molecular weight distribution, stable extraction performance, high extraction selectivity and the like.
Owner:SOUTH CHINA NORMAL UNIVERSITY
CNT (carbon nano tube) supported quaternary ammonium salt magnetic functional material as well as preparation method and application thereof
InactiveCN107670640ASuperparamagneticStrong magnetismOther chemical processesWater contaminantsPerchlorateAdsorption selectivity
The invention relates to a CNT (carbon nano tube) supported quaternary ammonium salt magnetic functional material as well as a preparation method and application thereof. The magnetic functional material is characterized by comprising a carboxylic CNT, a nanoscaled magnetic material coating the surface of the carboxylic CNT, an amination reagent supported on the surface of the carboxylic CNT and aquaternary ammonium salt functional reagent grafted on the amination reagent. Compared with the prior art, the magnetic functional material has the advantages that the prepared magnetic functional material can be used for removing perchlorate in water, is comparatively strong in magnetism and has comparatively high adsorption capacity and comparatively high adsorptive selectivity; and in addition, the preparation method is simple.
Owner:NINGBO MUNICIPAL CENT FOR DISEASE CONTROL & PREVENTION
A kind of preparation method of the surface polydopamine modified magnetic carbon nanotube
ActiveCN104072762BSuperparamagneticRapid separation and enrichmentMagnetite NanoparticlesBiocompatibility Testing
Owner:XI AN JIAOTONG UNIV
Method for detecting escherichia coli based on visual BPE-ECL technology
ActiveCN112964701AThe principle is simpleStrong specificityChemiluminescene/bioluminescenceBiological material analysisImmunomagnetic beadMinced beef
The invention discloses a kit based on immunomagnetic bead separation, and application of the kit. The invention further discloses a method for detecting the concentration of escherichia coli based on a visual BPE-ECL technology. The invention further discloses application of the kit and the detection method in detection of the concentration of escherichia coli in food. According to the established method for detecting the concentration of the escherichia coli through the visual BPE-ECL technology, whether the escherichia coli exists in a sample to be detected or not can be observed through naked eyes, the method has the advantages of being simple in principle, rapid (the experimental period is 45 min), high in specificity and high in detection sensitivity (the detection limit is 101 CFU / mL), the method is easy and convenient to operate, actual liquid samples (milk and tap water) do not need to be preprocssed, and a solid actual sample (minced beef) is simply preprocessed according to the national standard; and meanwhile, biochemical modification does not need to be carried out on the surface of a bipolar electrode, and the electrode can be repeatedly used, so the detection cost can be effectively reduced.
Owner:NANJING UNIV OF TECH
Preparation and application of a polyethylene glycol functionalized magnetic carbon nanotube
ActiveCN105688818BGood storage stabilityEasy to useIon-exchange process apparatusOther chemical processesPolyethylene glycolSolid phase extraction
The invention relates to the preparation and application of polyethylene glycol functionalized magnetic carbon nanotubes. The method is that carbon nanotubes are added to nitric acid solution, magnetically stirred for reaction, diluted with water, dried, placed in a mixed solution of ethylene glycol, ferric salt, sodium citrate, sodium acetate and polyethylene glycol, and ultrasonically placed in a reaction kettle react to obtain carbon nanotube derivatives supported by ferroferric oxide; react with aminated polyethylene glycol substances, EDC and NHS to obtain polyethylene glycol covalently modified magnetic carbon nanotube composite materials. The polyethylene glycol-functionalized magnetic carbon nanotubes of the present invention show good dispersibility and stability as a dispersed solid-phase extraction adsorbent, act on Z-ligustilide with high selectivity, and can realize rapid preparation of pure Higher quality control of Z-ligustilide and related traditional Chinese medicines and preparations; the method for preparing composite materials in the present invention is simple to operate, convenient to prepare, low in cost, and suitable for industrialized large-scale production.
Owner:CHENGDU INST OF BIOLOGY CHINESE ACAD OF S
Self-assembled amino acid derivative functionalized magnetic-carbon nanotube composite material and its preparation method and application
ActiveCN111229189BTightly boundStable in natureComponent separationOrganic compound preparationHydroxyprolineMagnetic carbon
The invention discloses a self-assembled amino acid derivative functionalized magnetic-carbon nanotube composite material and its preparation method and application. The magnetic Fe is prepared by a one-step solvothermal reduction method. 3 o 4 ‑Multi-walled carbon nanotube composites utilizing magnetic Fe 3 o 4 Hydrophobic interaction of / MWCNTs composite material, N-hexadecyl-L-hydroxyproline self-assembled on the surface of carbon nanotubes to obtain a stable complex, this material was used as a chiral adsorbent to resolve amino acid enantiomers isomers to test their chiral resolution performance. The present invention uses magnetic nanomaterials as chiral selector carriers, combined with self-assembly technology as a fixed method to prepare chiral recognition materials, which is expected to improve the stability of the chiral stationary phase and the lack of loading capacity, and realize rapid screening of chiral selectors. Efficient, high-capacity chiral separations.
Owner:TIANJIN UNIV
Surface-modified magnetic material of benzenesulfonic acid and its preparation method and application
InactiveCN103065754BSimple manufacturing methodSuperparamagneticInorganic material magnetismPeptide preparation methodsSodium acetateMicrosphere
The invention discloses a preparation method and application of a magnetic material for surface finish benzene sulfonic acid. The preparation method comprises the steps of adopting FeCl3 as a raw material, enabling ethylene glycol to serve as a disperse system, enabling anhydrous sodium acetate to serve as a reducing agent, and utilizing a hydrothermal method to prepare ferroferric oxide magnetic microspheres; then dispersing the ferroferric oxide magnetic microspheres into ethanol / water mixed solution, adding ammonia water and tetraethoxy-silicane, enabling tetraethoxy-silicane to undergo hydrolytic polymerization on the surfaces of the magnetic microspheres, and obtaining an core-shell magnetic material; dispersing the core-shell magnetic material to mixed solution of toluene and N,N-dimethylformamide after drying, adding 2-(4-chloride sulfonyl phenyl)-ethyl trimethoxy silane, and obtaining the magnetic material for surface finish benzene sulfonic acid by a silanization reaction. The magnetic material has rich active groups, can be dispersed stably in solution, is renewable and can be recycled. The magnetic material serves as an adsorbent, is large in surface area and strong in selectivity, weakly alkaline compounds can be adsorbed from a matrix by strong electrostatic interaction of sulfo groups and hydrophobic interaction of a benzene ring, and rapid separation and enrichment can be achieved by simple magnetic field effect.
Owner:TIANJIN UNIV
Carbon nanotube immobilized quaternary ammonium salt magnetic functional material and its preparation method and application
InactiveCN107670640BSuperparamagneticStrong magnetismOther chemical processesWater contaminantsPerchlorateEngineering
The invention relates to a CNT (carbon nano tube) supported quaternary ammonium salt magnetic functional material as well as a preparation method and application thereof. The magnetic functional material is characterized by comprising a carboxylic CNT, a nanoscaled magnetic material coating the surface of the carboxylic CNT, an amination reagent supported on the surface of the carboxylic CNT and aquaternary ammonium salt functional reagent grafted on the amination reagent. Compared with the prior art, the magnetic functional material has the advantages that the prepared magnetic functional material can be used for removing perchlorate in water, is comparatively strong in magnetism and has comparatively high adsorption capacity and comparatively high adsorptive selectivity; and in addition, the preparation method is simple.
Owner:NINGBO MUNICIPAL CENT FOR DISEASE CONTROL & PREVENTION
Renewable amino-functionalized magnetic carbon nanocomposite material and its preparation method and application
ActiveCN105129898BImprove bindingUniform particle sizeOther chemical processesAlkali metal oxides/hydroxidesCarbon nanotubeCarbon nanocomposite
The invention relates to a renewable amino-functionalized magnetic carbon nanocomposite material, which is characterized in that its preparation method comprises the following steps: (1) adding ferric iron salt into ethylene glycol and ultrasonically dispersing; (2) subsequently Add anhydrous sodium acetate, then add sodium hydroxide and amino functional reagents, ultrasonically disperse until the solution is clear; (3) add carbon nanotubes to the solution in step (2), ultrasonically disperse, and then add the mixed solution to the polytetrafluoroethylene reaction in an ethylene autoclave; (4) cool the product after step (3) to room temperature, magnetically separate it, wash it with ultrapure water until the pH is 7.0, wash it several times with ethanol, and dry it in vacuum to obtain a renewable Amino-functionalized magnetic carbon nanocomposites, the present invention also provides a method for removing acidic industrial dyes in water, which can effectively realize the recycling and reuse of resources, avoid secondary pollution to water bodies to the greatest extent, and be effective in the removal of environmental pollutants. It has broad application prospects.
Owner:NINGBO UNIV
A pesticide residue detection method for removing impurities by magnetic carbon nanotubes
ActiveCN104062384BIncrease surface areaMeet the environmental needs of residue detectionComponent separationChemical platingModified carbon
The invention relates to a pesticide residue detection method capable of clearing impurities through a magnetic carbon nano tube. The method comprises the steps of uniformly plating the surface of a modified carbon nano tube with magnetic particles by a chemical plating method to obtain the magnetic carbon nano tube, wherein the diameters of magnetic particles are about 10-30 nm; activating the magnetic carbon nano tube; and uniformly mixing a pesticide-containing vegetable extracting solution sample and an activated magnetic material, wherein the activated magnetic material adsorbs impurities in the vegetable extracting solution sample under the assistance of an external magnetic field. The magnetic carbon nano tube with large surface area is used as an impurity adsorbent in pesticide detection, can adsorb pigments from a complicated substrate under the mutual action of electrons and the dewatering action of the carbon nano tube and can adsorb compounds, such as organic acids and phenols, under the weak anion exchange action obtained by the fact that the surfaces of the magnetic nano particles are grafted with polymers.
Owner:罗牛山腾德检测认证服务(海南)有限公司
Magnetic andrographolide imprinted polymer as well as preparation method and application thereof
PendingCN113861358ARapid separation and enrichmentImprove adsorption and separation efficiencyOther chemical processesPolymer scienceAdsorption equilibrium
The invention discloses a magnetic andrographolide imprinted polymer and a preparation method and application thereof. The preparation method comprises the steps of: adding andrographolide and a monomer into an organic solvent for pre-assembly, then adding the pre-assembly body into a reversed-phase micro-emulsion system containing modified Fe3O4 magnetic nanoparticles, finally adding a cross-linking agent and an initiator, carrying out polymerization reaction at 30-60 DEG C for 25-28 hours, and then removing andrographolide to obtain the magnetic andrographolide imprinted polymer. The magnetic andrographolide imprinted polymer prepared by the method has the advantage that the andrographis paniculata adsorption speed is high, and adsorption equilibrium can be achieved in a short time. The polymer prepared by the method has good magnetism. When the polymer is used for extracting and separating andrographolide, the operation is simpler and more convenient. Selective separation is realized, and a higher recovery rate is obtained.
Owner:CHENGDU TONGDE PHARMA
Magnetic molecularly imprinted polymer for separating atrazine, and preparation method for magnetic molecularly imprinted polymer
The invention discloses a method for preparing a magnetic molecularly imprinted polymer for separating atrazine. The method comprises the following steps of: 1) activating Fe3O4atSiO2 particles, and performing surface modification by using a silane coupling agent to obtain composite magnetic nano-particles; and 2) adding the atrazine and methacrylic acid into an organic solvent and preassembling, adding the composite magnetic nano-particles, a crosslinking agent and an initiator, performing polymerization reaction at the temperature of between 60 and 70 DEG for 20 to 24h in an anaerobic environment, and removing the atrazine to obtain the magnetic molecularly imprinted polymer. The method is easy to operate and is suitable for large-scale production; the time consumption is low; raw materials are cheap and readily available; and membrane materials with micron-scale and nano-scale diameters can be obtained. The invention also provides the magnetic molecularly imprinted polymer prepared by the method. Magnetic molecules are firmly combined, and the magnetic molecularly imprinted polymer is high in stability and has stronger adsorption capacity when separating the atrazine.
Owner:JIAXING UNIV
Preparation and Application of Alkylphenol Composite Template Molecularly Imprinted Polymer Modified Magnetic Graphene Oxide
ActiveCN109354657BStrong specificitySuperparamagneticIon-exchange process apparatusOther chemical processesBenzoic acidAlkylphenol
Owner:GUANGDONG UNIV OF TECH
Magnetic carbon nanotube composite material and preparation method and application thereof
InactiveCN103041773BImprove bindingEasy to separateIon-exchange process apparatusComponent separationSorbentHexamethylenediamine
The invention discloses a magnetic carbon nanotube composite material and a preparation method and an application thereof. The preparation method comprises the following steps: adding FeCl3.6H2O to an ethylene glycol solution; then adding anhydrous sodium acetate and polyethylene glycol; adding a carboxylated multiwalled carbon nanotube; performing ultrasonic dispersion; adding hexamethylenediamine or ethanediamine; heating to 200-300 DEG C for reaction for 8-24h; and washing and performing vacuum drying to prepare the amino-modified magnetic Fe3O4-carbon nanotube composite material. The amino-modified magnetic Fe3O4-carbon nanotube composite material prepared by the invention is of nanoscale and superparamagnetism, can be stably dispersed in solutions, and can be quickly separated and enriched through a simple action of a magnetic field. As an adsorbent, the material is large in superficial area and has various active groups on the surface. The material can adsorb pigments from complex substrates through pi-pi electron interaction and hydrophobic effect of the carbon nanotube and can adsorb compounds such as organic acids and phenols through weak anion exchange effect of amino groups on the surfaces of magnetic nanoparticles.
Owner:TIANJIN UNIV
A kind of immune nanocellulose magnetic liposome and preparation method thereof
ActiveCN103961703BImprove stabilityReduce reunionInorganic non-active ingredientsAntibody ingredientsAntigenCell separation
The invention belongs to the technical field of nano-magnetic materials for biology, and relates to a nano-magnetic particle, in particular to an immune nano-cellulose magnetic liposome and a preparation method thereof. It is a core-shell structure, the core is magnetic material Fe3O4, the middle layer is a mixture of liposome and nanocellulose, and the outermost layer is the antibody coated on the middle layer; the mass content of nanocellulose is 0.1%~ 50.0%, the mass content of liposome components is 0.5% ~ 90.0%, and the mass content of magnetic materials is 0.1% ~ 50.0%. The immune nanocellulose magnetic liposome of the present invention has good biocompatibility. The ligand coupling in the substance can recognize and bind to the corresponding antigen, antibody or nucleic acid, etc., and can be separated and enriched rapidly in an external magnetic field. It can be used for the detection and separation and purification of biological materials, and can be used in cell separation, immobilized enzymes, targeted drugs and Immunoassays and other biological fields have broad application prospects.
Owner:上海裕隆医学检验所股份有限公司
A kind of preparation method of surface aldehyde functionalized magnetic nanoparticles
ActiveCN103706320BEasy to prepareSuperparamagneticOther chemical processesMagnetic materialsSodium acetateMagnetite Nanoparticles
The invention discloses a preparation method for magnetic nanoparticles with surface aldehyde group functionalization. FeCl3.6H2O and anhydrous sodium acetate are dissolved in ethylene glycol, and a uniform and transparent mixed solution is prepared; The surface modification agent glutaraldehyde is added in the prepared mixed solution, after stirring and ultrasonic treatment, a uniform mixed solution is prepared; the prepared mixed solution is subjected to a solvothermal reaction in a high pressure reactor, after the reaction is over, the above mixture is cooled naturally to room temperature; In presence of an applied magnetic field, solid-state compounds are separated from the reaction products. The magnetic nanoparticles with surface aldehyde group functionalization have superparamagnetism, and can be dispersed in a solution steadily. Rapid separation and enrichment can be achieved by utilization of an applied magnetic field. The magnetic nanoparticles can be regenerated and used repeatedly, and has strong magnetism. Because of large specific surface area and surfaces with aldehyde group active groups, the magnetic nanoparticles can be used for separation of biomacromolecules and drug targeting delivery and adsorption.
Owner:XI AN JIAOTONG UNIV
A magnetic carbon nanotube used in the detection of pesticide residues
ActiveCN104084127BIncrease surface areaMeet the environmental needs of residue detectionComponent separationOther chemical processesSorbentPesticide residue
The invention relates to a magnetic carbon nanotube used in the detection of pesticide residues. The chemical plating method is used to evenly plate magnetic particles on the surface of the modified carbon nanotube, and the diameter of the magnetic particle is about 10-30nm to obtain a magnetic carbon nanotube; After the carbon nanotubes are activated; the vegetable extract sample containing pesticides is mixed with the activated magnetic material evenly, and the activated magnetic material is assisted by an external magnetic field to absorb the magnetic material of the vegetable extract sample impurities. The present invention uses magnetic carbon nanotubes as impurity adsorbents in pesticide detection, the magnetic carbon nanotubes have a large surface area, and can absorb pigments from complex matrices through the electronic interaction and hydrophobic effect of carbon nanotubes, and graft the surface of magnetic nanoparticles The weak anion exchange effect of the polymer can adsorb organic acids, phenols and other compounds.
Owner:广州国标检验检测有限公司
Method for separating and enriching sulfonamide antibiotics in water
ActiveCN112557530ARapid separation and enrichmentIncrease mass transfer rateComponent separationOrganic solventBiology
The invention relates to the field of separation of organic pollutants in a water environment, and particularly discloses a method for separating and enriching sulfonamide antibiotics in water. The method comprises the following steps: 1) sealing one end of a hollow fiber membrane, and loading an extraction solvent on the hollow fiber membrane; 2) injecting a receptor solution into the inner cavity of the hollow fiber membrane; 3) immersing the closed end of the hollow fiber membrane treated in the step 2) in a water sample, inserting a working electrode into the water sample, inserting a counter electrode into the receptor solution, applying voltage to the working electrode and the counter electrode to form an electric field, and extracting sulfonamide antibiotics in the water sample under the action of the electric field; and 4) after the extraction is finished, collecting the receptor solution in the hollow fiber membrane to finish the separation and enrichment of the sulfonamide antibiotics in the water sample. The method disclosed by the invention has the advantages of small organic solvent consumption, high mass transfer rate, high sulfonamide antibiotic recovery rate and wide application prospect.
Owner:HENAN BUSINESS SCI RES INST +1
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