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38results about How to "Good paramagnetism" patented technology
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Magnetic nanoparticles of hydroxyapatite and preparation method thereof
This invention is related to magnetic nanoparticles of hydroxyapatite for biomedical applications and the preparation method thereof. The magnetic particles of hydroxyapatite are prepared by a wet chemical co-precipitation method at lower temperature, wherein the calcium ions originally existing in hydroxyapatite are replaced with divalent or trivalent metal ions, for example, Fe+2 ion, to form magnetic nanoparticles of hydroxyapatite.
Owner:NAT TAIWAN UNIV
Amido modified magnetic nano-particle and method for preparing immune magnetic nano-separation agent
InactiveCN101269844AHigh antibody bindingQuality improvementFerroso-ferric oxidesPeptide preparation methodsSolventSilica gel
The invention discloses a preparation method of magnetic nano-particles modified by aminogen. The preparation method comprises the steps that: (1) the alcoholysis of the magnetic nano-particles is carried out in a mixed solvent of toluene and low class monohydric alcohol, and surfaces of the magnetic nano-particles are coated by silica gel; the magnetic nano-particles coated by the silica gel are obtained; (2) the magnetic nano-particles coated by the silica gel react with a silane coupling agent, and the magnetic nano-particles coated by the silica gel with surfaces to modify an amino functional group are made. The invention also discloses a preparation method of an immunity magnetic nano separation agent which comprises the preparation method. The preparation method of the invention has the advantages of stable and moderate reaction system, simple and controllable operation and cheap agent material cost, and the waste reaction solution is easy to treat, and does not pollute environment. The preparation method is adapted to the industrial production. The magnetic nano-particles modified by aminogen has the advantages of small particle size, narrow distribution and good dispersibility, and the immunity magnetic nano separation agent has the advantages of high antibody combining rate, low non-specific binding rate, rapid magnetic separation, etc.
Owner:SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
Method for preparing polyvinyl alcohol magnetic film
InactiveCN101892528AImprove mechanical propertiesGood chemical stabilityFilament/thread formingMonocomponent synthetic polymer artificial filamentFiberPolyvinyl alcohol
The invention discloses a method for preparing a polyvinyl alcohol magnetic film, which comprises: dissolving egg albumen powder serving as a dispersant in deionized water, adding nanoscale Fe3O4 powder, and performing ultrasonic dispersion treatment to obtain a nano Fe3O4 aqueous solution system, wherein the mass ratio of the egg albumen powder to the Fe3O4 is 2:1; adding the system into aqueous solution of polyvinyl alcohol to prepare a spinning solution, wherein the polyvinyl alcohol concentration of the spinning solution is 6 to 9 weight percent, and the Fe3O4 concentration is (0.2 to 4)*10<-3>g / mL; and obtaining a nano fiber-like polyvinyl alcohol magnetic film by using an electrostatic spinning process. In the invention, a nontoxic and nonirritating surface dispersant is used, the dispersion effect is desirable, the preparation process of the magnetic film is simple and the obtained magnetic film has stable performance and high magnetic performance.
Owner:SUZHOU UNIV
Magnetic citric acid modified chitosan microsphere as well as preparation method and application thereof
ActiveCN111001396AGood water solubilityImprove adsorption capacityOther chemical processesWater contaminantsAqueous solubilityChitosan microspheres
The invention discloses a preparation method of a magnetic citric acid modified chitosan microsphere. The preparation method comprises the following steps: (1) preparing a water-based Fe3O4 nano magnetic material; (2) preparing citric acid modified chitosan; and (3) preparing the magnetic citric acid modified chitosan microsphere. Chitosan is subjected to citric acid modification, so that chitosanand citric acid are subjected to acylation reaction to form a secondary amide product, and carboxyl groups are introduced, so that the water solubility of chitosan can be improved, and the adsorptionperformance of chitosan to metal ions can also be improved. The prepared magnetic citric acid modified chitosan microsphere can realize high-efficiency removal of Cr (VI) in wastewater, and can alsobe regenerated and recycled.
Owner:SOUTHWEST PETROLEUM UNIV +1
Method for preparing composite nano microsphere for enriching lung cancer cells
ActiveCN102344117AGood dispersionGood biocompatibilityIndividual molecule manipulationPreparing sample for investigationCancer cellMicrosphere
The invention discloses a composite Fe3O4 magnetic nano particle for combining lung cancer cells and a preparation method thereof. Polyimide is modified on the surface of the Fe3O4 magnetic nano particle, and composite protein which has capacity of combining the lung cancer cells is marked on the Fe3O4 magnetic nano particle, wherein the composite protein which has capacity of combining the lung cancer cells consists of staphylococcus A (SPA) protein and one or two of anti-CD44 antibody and anti-CK7 antibody. The invention also discloses a method for enriching and detecting the lung cancer cells in sputum. The method comprises the following steps of: a) collecting sputum, and fully liquefying the sputum; b) adding a composite nano magnetic particle solution and reacting; c) centrifuging reaction liquid to enrich cells in the reaction liquid; and suspending the obtained cells again, tabletting the suspension, dying, sealing and performing microscopic examination by using a thinprep cytology test (TCT) system. Compared with the conventional method, the method has the advantages that the positive rate of the lung cancer cells which is detected in the sputum is improved by more than 30 percent, the detection efficiency is improved obviously and detection cost is reduced to certain extent.
Owner:南通得一科技咨询有限公司
Near-infrared fluorescent magnetic Fe NCs dual-mode probe as well as synthesis method and application thereof
ActiveCN112175605AOptically stableSmall particle sizeOrganic/organic-metallic materials magnetismAnalysis using nuclear magnetic resonanceParamagnetismParticle physics
The invention discloses a near-infrared fluorescent magnetic Fe NCs dual-mode probe as well as a synthesis method and an application thereof. The valence state of an iron element in the magnetic Fe NCs dual-mode probe is zero, the particle size of the iron element is 5 nm, an iron nano-cluster prepared from glutathione serving as a stabilizer and iron ions in a molar ratio of 1: 0.3073 has excellent near-infrared fluorescence emission capacity, interference of biological autofluorescence in a sample can be effectively avoided, and the product can be used for high-sensitivity detection of the drug molecule tiopronin in a complex detection system. Besides, the probe also has relatively strong paramagnetic properties, can generate bright T1 weighted image signals under the action of an external magnetic field, is gradually enhanced along with the increase of the concentration of the probe, and also has a wide application prospect in the aspect of magnetic resonance imaging.
Owner:TIANJIN NORMAL UNIVERSITY
Method for immobilizing deinococcus radiodurans with functional magnetic carriers and application of method
InactiveCN105132403AGood chemical stabilityHigh mechanical strengthOn/in inorganic carrierRadioactive decontaminationDeinococcusDiethylenetriamine
The invention provides a method for immobilizing deinococcus radiodurans with functional magnetic carriers and an application of the method in treatment of uranium-bearing wastewater. An organic reagent is adopted for surface acyl chloride functionalization of magnetic Fe3O4 nanoparticles to obtain DR (deinococcus radiodurans) immobilizing carriers, the DR immobilizing carriers are magnetically immobilized with diethylenetriamine chemically-modified DR to obtain a functional magnetic adsorbent resistant to deinococcus radiodurans, and the functional magnetic adsorbent resistant to deinococcus radiodurans is applied to adsorption of the uranium-bearing wastewater. The novel functional magnetic adsorbent resistant to deinococcus radiodurans has the advantages of high radiation resistance, low cost, high chemical stability, high mechanical strength, effectiveness in uranium adsorption and the like. In addition, the method is simple and easy to realize magnetic control, and uranium content of low-concentration uranium-bearing wastewater with the concentration being 0.45-0.55mg / L can be reduced by more than 95%.
Owner:NANHUA UNIV
Magnetic targeting cell membrane modified ligand, drug-loading material, preparation method of magnetic targeting cell membrane modified ligand and drug-loading material and application of drug-loading material
ActiveCN111939269AGood antitumor activityGood paramagnetismOrganic active ingredientsEnergy modified materialsIn vitro testCell membrane
The invention discloses a magnetic targeting cell membrane modified ligand, a drug-loading material, a preparation method of the magnetic targeting cell membrane modified ligand and the drug-loading material and an application of the drug-loading material. The structural general formula of the magnetic targeting cell membrane modified ligand is shown as I series or II series in the formula (1). The magnetic targeting cell membrane drug-loading material is obtained by performing chemical covalent bond modification on a cell membrane to modify the magnetic targeting cell membrane modified ligand, an in-vitro test shows that the material is good in stability, can be effectively taken in by tumor cells, and has relatively high selectivity on the tumor cells, and besides, the material has remarkable paramagnetism. Under the condition of an external magnetic field, a magnetic targeting effect can be achieved. In an in-vitro anti-tumor test, the drug-loading material is remarkable in anti-tumor activity and hardly has toxicity to normal cells, so that the drug-loading material has a potential application of targeted therapy of malignant tumors.
Owner:SOUTHEAST UNIV
Hybridized aerogel material with self-cleaning heat-insulation and wave-absorbing multi-function
InactiveCN110038494AEliminate damageImprove performanceAerogel preparationColloidal chemistry detailsMorpholinePotassium hydroxide
The invention discloses a hybridized aerogel material with self-cleaning, heat-insulation and wave-absorbing multi-function. The hybridized aerogel material is prepared from the following raw materials: in percentage by weight, tetraethoxy titanium, absolute ethyl alcohol, acetone, nitric acid, ammonium hydroxide, tetraethoxysilane, trimethylethoxysilane, a potassium hydroxide solution, a sodium nitrate solution, a ferrous sulfate solution, N-ethyl morpholine and pure water. The micron-sized roughness of the aerogel honeycomb structure and the nanoscale roughness caused by Fe3O4 particles caneffectively reduce the water-solid contact area, and the material presents the good hydrophobicity, and can achieve self-cleaning effect. Because the aerogel is filled with a great amount of air whilethe solid phase proportion is relatively less, the pyroconductivity is low, heat transmission is remarkably reduced due to random distribution of air vents, therefore the aerogel material has the good heat insulation property, and can achieve the excellent infrared stealth function. The hydrophobicity of the aerogel avoids the situation of decreasing heat insulation property caused by invasion ofmoisture in the environment, so that the material can be applied to the harsh environment, and has the outstanding comprehensive properties of high adsorption and low weight.
Owner:合肥卓汇新材料科技有限公司
Preparation method of 8-methoxy-2-tetralone
ActiveCN106278841AGood paramagnetismProcess reaction conditions are mildOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsMagnetite NanoparticlesParamagnetism
The invention relates to a preparation method of 8-methoxy-2-tetralone. According to the method, 8-methoxy-2-tetralone is synthesized through a hydrolysis reaction, a reduction reaction and the like with 2-methoxybenzonitrile serving as the starting material. The method has the advantages that the raw material 2-methoxybenzonitrile is cheap and easy to obtain; reaction conditions of the technology are mild, reaction time of the technology is short, the yield is high, operation is easy and convenient, and industrial production can be easily achieved; use of expensive catalysts like rhodium is avoided in the technology, and production cost is low; adopted novel magnetic-nanoparticle-loaded lewis acid has good paramagnetism and can be rapidly separated from a reaction system and recovered just by adopting a simple applied magnetic field in separation and recovery, the process is simple, the quantity of the three wastes is small, and production cost is low.
Owner:ZHEJIANG YONGTAI PHARMA
Synthesis method of MnO nanometer material of T1 contrast agent
InactiveCN104436222AGood dispersionObvious structural advantagesEmulsion deliveryHazardous substanceRoom temperature
The invention discloses a synthesis method of a MnO nanometer material of a T1 contrast agent, and relates to a magnetic nanometer material. The method comprises the following steps: mixing trioctylamine with an oleic acid solution evenly; adding manganese acetate powder; dispersing, carrying out heating reaction, and cooling to room temperature; and participating and centrifuging reaction products, and washing, so as to obtain the MnO nanometer material of the T1 contrast agent. The method for preparing the MnO nanometer material of the T1 contrast agent is simple to operate; a reactant is cheap, and low in cost; the reaction is rapidly finished; the required time is short; the synthesis method hardly causes side reactions and high in product yield; energy utilization rate is high; the reaction process is free from generation of harmful substances and is energy-saving and environment-friendly; and the MnO nanometer material has good paramagnetism and T1 contrast effect; r1 value is 2.369mM<-1>s<-1>; and the prepared MnO magnetic nanometer particles are uniform in particle size, have good dispersity and stability, and can be stored for a long period of time after being dispersed in cyclohexane.
Owner:XIAMEN UNIV
Preparation method of novel nano-material used for biosensor
InactiveCN104355289AGood paramagnetismGood magnetic responseIndividual molecule manipulationMaterial analysis by electric/magnetic meansMagnetite NanoparticlesMaghemite
The invention provides a preparation method of a novel nano-material used for a biosensor. The novel nano-material comprises maghemite / silica composite magnetic nanoparticles of walnut structures. The preparation method comprises the following steps: (a) preparing maghemite nanoparticles; (b) hydrolyzing and condensing the maghemite nanoparticles; (c) washing and drying. The invention discloses the preparation method of the novel nano-material used for the biosensor. The preparation method is simple, practicable, efficient and reasonable; the prepared nano-material has excellent paramagnetism and mangnetic responsiveness, and is higher in dispersibility and oxidation resistance.
Owner:常熟市微尘电器有限公司
Drill string component with high corrosion resistance, and method for the production of same
PendingUS20220033924A1Improve solubilityLow ductilityDrilling rodsFurnace typesMining engineeringAlloy
A drill string component, in particular a drilling collar component, an MWD component, or an LWD component for use in oilfield technology and particularly in deep drilling, is provided. A method of making a drill string component, and a steel alloy useful in making a drill string component, are also provided.
Owner:BOHLER EDELSTAHL GMBH & CO KG +1
Terbium-containing borate compound, polycrystalline compound thereof, optical crystal, and preparation method and application of optical crystal
ActiveCN109868504AHigh photodamage thresholdSynthesis temperature is lowPolycrystalline material growthLuminescent compositionsSolid-stateTerbium
The invention discloses a terbium-containing borate compound. The chemical formula of the terbium-containing borate compound is Rb2LiTbB2O6. The invention also discloses a polycrystalline compound ofthe terbium-containing borate compound, an optical crystal, and a preparation method and application of the optical crystal. The polycrystalline compound can be used as a fluorescent powder matrix, and the optical crystal can be used as a magneto-optical crystal. The terbium-containing borate compound is simple in synthesis and low in cost, grows easily, and has important economic value and scientific research value in the field of solid-state illumination and magneto-optical materials.
Owner:DEZHOU UNIV
Method for preparing polyvinyl alcohol magnetic film
InactiveCN101892528BImprove mechanical propertiesGood chemical stabilityFilament/thread formingMonocomponent synthetic polymer artificial filamentFiberElectrospinning
The invention discloses a method for preparing a polyvinyl alcohol magnetic film, which comprises: dissolving egg albumen powder serving as a dispersant in deionized water, adding nanoscale Fe3O4 powder, and performing ultrasonic dispersion treatment to obtain a nano Fe3O4 aqueous solution system, wherein the mass ratio of the egg albumen powder to the Fe3O4 is 2:1; adding the system into aqueoussolution of polyvinyl alcohol to prepare a spinning solution, wherein the polyvinyl alcohol concentration of the spinning solution is 6 to 9 weight percent, and the Fe3O4 concentration is (0.2 to 4)*10<-3>g / mL; and obtaining a nano fiber-like polyvinyl alcohol magnetic film by using an electrostatic spinning process. In the invention, a nontoxic and nonirritating surface dispersant is used, the dispersion effect is desirable, the preparation process of the magnetic film is simple and the obtained magnetic film has stable performance and high magnetic performance.
Owner:SUZHOU UNIV
A preparation method of magnetically imprinted polymer for separation and purification of ractopamine
InactiveCN103965419BFast adsorption ratePrevent leakageOther chemical processesFunctional monomerElution
The invention relates to a preparation method of a magnetic molecularly-imprinted polymer for separating and purifying ractopamine, aiming to solve the problem of leakage of magnetic ferroferric oxide in the processes of template elution and practical application of an existing magnetic ractopamine molecularly-imprinted polymer. The method comprises the steps of (1) preparing magnetic ferroferric oxide nano microspheres; (2) preparing an ATPS-modified ferroferric oxide material (ATPS-Fe3O4); (3) preparing a magnetic Fe3O4 functional monomer (MAC-ATPS-Fe3O4); (4) preparing a magnetic RAC molecularly-imprinted polymer (Fe3O4@MIPs). The prepared ractopamine magnetic molecularly-imprinted polymer disclosed by the invention is stable in performance, and can solve the problem of leakage of magnetic ferroferric oxide; the magnetic polymer has a relatively fast adsorption rate to ractopamine, meets the needs of rapid detection, has a rapid magnetic separation capacity, and is very suitable for field sample treatment.
Owner:BOHAI UNIV
Ethylene glycol-based magnetic fluid composite film and preparation method thereof
InactiveCN107346697AHigh crystallinityImprove dispersion stabilityChemical vapor deposition applicationMagnetic liquidsWater basedMagnetic susceptibility
The invention provides an ethylene glycol-based magnetic fluid composite film and a preparation method thereof, which relate to the technical field of magnetic composite materials and are mainly prepared from the following components in parts by mass: ethylene glycol-based magnetic fluid 90-110 15-25 parts of polyvinyl alcohol, 70-90 parts of deionized water, among which, the ethylene glycol-based magnetic fluid is mainly prepared from nano ferric oxide, ethylene glycol and a dispersion stabilizer, which relieves the existing magnetic fluid Among them, the carrier liquid matrix is water-based or oil-based, so that the degree of dispersion of magnetic nanoparticles has not been significantly improved, resulting in the technical problem that the performance of the magnetic fluid composite film is limited. The ionic water cooperates with each other to make the magnetic particles evenly distributed in the composite film, so that the composite film can maintain good paramagnetic properties, the saturation magnetization is larger, the magnetic susceptibility per unit mass is higher, and the strain capacity is better. The technical effect of better magnetic properties.
Owner:XINJIANG UNIVERSITY
Tumor-targeting, clearable human protein-based MRI nanoprobes, and compositions and methods thereof
ActiveUS11369698B2Good paramagnetismGood biocompatibilityPowder deliveryTransferrinsTumor targetingHuman proteins
The invention provides a novel class of clearable, tumor-targeting and human protein-based MRI nanoprobes and contrast agents and their compositions, and methods of preparation and use thereof.
Owner:UNIV OF MASSACHUSETTS
A kind of preparation method of 8-methoxy-3,4-dihydro-1h-2-naphthalenone
ActiveCN106278841BGood paramagnetismProcess reaction conditions are mildOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalysts2-TetraloneMagnetite Nanoparticles
The invention relates to a method for preparing 8-methoxy-3,4-dihydro-1H-2-naphthalenone. The invention uses 2-methoxybenzonitrile as a starting material, and undergoes hydrolysis, reduction and other reactions. Synthesis of 8‑methoxy‑3,4‑dihydro‑1H‑2‑naphthalenone. It has the following advantages: 1) 2-methoxybenzonitrile benzonitrile raw material is cheap and easy to obtain, 2) the process reaction conditions are mild, the reaction time is short, the yield is high, the operation is simple, and it is easy to realize industrial production, 3) the process avoids Using expensive catalysts such as rhodium, etc., the production cost is lower. 4) The new magnetic nanoparticles used to load Lewis acid have good paramagnetic properties. For separation and recovery, they can be quickly separated and recycled from the reaction system using a simple external magnetic field. The process is simple, there is less waste, and the production cost is relatively low.
Owner:ZHEJIANG YONGTAI PHARMA
A kind of preparation method of fe3o4/bi core-shell nanorod
ActiveCN105345026BImprove qualityGood paramagnetismTransportation and packagingMetal-working apparatusHydrazine compoundDistilled water
Owner:陕西燕园众欣石墨烯科技有限公司
Preparation method of anti-tumor nano robot
PendingCN112795880ASmall particle sizeImprove particle size uniformityMaterial nanotechnologyVacuum evaporation coatingSputteringPhysical chemistry
The invention belongs to the field of nano materials, and particularly relates to a preparation method of an anti-tumor nano robot. The anti-tumor nano robot comprises the following steps that (a) an iron target is placed in a sputtering chamber, argon and oxygen are introduced into the sputtering chamber, and a power supply of the sputtering chamber is started to carry out magnetron sputtering; during the period, the temperature of the sputtering chamber is 800-1200 DEG C; (b) after the magnetron sputtering is finished, the temperature of the sputtering chamber is maintained at 800-1200 DEG C, and acetylene is introduced into the sputtering chamber; and (c) after acetylene introduction is finished, protective gas is introduced into the sputtering chamber, and the temperature of the sputtering chamber is rapidly reduced to 100-300 DEG C to obtain the anti-tumor nano robot. Experimental results show that the saturation magnetization intensity of the anti-tumor nano robot prepared by the method is 19-20 emu / g, the residual magnetization intensity is 4-5 emu / g, the coercive force is 550-600 G, the particle size is 70-100 nm, the particle size uniformity is less than 6.5%, the purity is greater than 99.9%, and the graphitization degree is greater than 90%.
Owner:美国发现集团有限公司
Material and method for enriching glycosylated protein and glycopeptide in urine
PendingCN114288995AImprove hydrophilicityImprove bindingOther chemical processesPeptide preparation methodsEnzyme digestionNanoparticle
The invention relates to the technical field of protein or polypeptide enrichment, and discloses a material and a method for enriching glycosylated protein and glycopeptide in urine. The enrichment material is composed of a metal organic framework and a ligand loaded on the metal organic framework, the metal organic framework is Fe3O4 / chitosan magnetic composite nanoparticles, and the ligand contains at least one carboxyl group. Under the action of an external magnetic field, the enrichment material is used for carrying out centrifugal enrichment on an enzyme digestion product of urine protein, due to the fact that the enrichment material has a plurality of hydrophilic groups, separation and enrichment of hydrophilic glycoprotein / glycopeptide can be achieved based on the similar compatibility principle, and the enrichment material has a magnetic inner core, so that the separation and enrichment of the hydrophilic glycoprotein / glycopeptide can be achieved. And the centrifugal time can be shortened through an external magnetic field, and higher selectivity, sensitivity and enrichment efficiency are achieved.
Owner:武汉承启医学检验实验室有限公司
Amido modified magnetic nano-particle and method for preparing immune magnetic nano-separation agent
InactiveCN101269844BHigh antibody bindingQuality improvementPeptide preparation methodsFerroso-ferric oxidesSilica gelSolvent
Owner:SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
Terbium-containing borate compound, terbium-containing borate polycrystalline compound, optical crystal, preparation method and use thereof
ActiveCN109868504BHigh photodamage thresholdSynthesis temperature is lowPolycrystalline material growthLuminescent compositionsPhysical chemistryBorate salt
Owner:DEZHOU UNIV
Production method and application of attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles
PendingCN110613854AHigh purityColloid forming fastMaterial nanotechnologyPowder deliverySide effectIron nanoparticle
The invention discloses a production method and application of attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles. The production method comprises the following steps: (1) purifying attapulgite; (2) producing oil-soluble ferroferric oxide nanometer particles; (3) obtaining the oil-soluble ferroferric oxide nanometer particles; (4) producing ferroferric oxide nanometer particles modified by dimercaptosuccinic acid; and (5) producing the attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles. According to the providedproduction method and application of the attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles, safe agents are used in the whole production process, the production process is safe and non-toxic, the operability is high, and the produced medicine carrier attapulgite-dimercaptosuccinic acid-modified ferroferric oxide nanometer compound particles have small toxic and side effects, and can reach a focus smoothly under the action of an external magnetic field while carrying a medicine.
Owner:HUAIYIN INSTITUTE OF TECHNOLOGY
Beta-NaGdF4:Eu<3+> red fluorescent powder and preparation method thereof
ActiveCN112111276AShine wellGood paramagnetismLuminescent compositionsCombinatorial chemistryRed fluorescence
The invention discloses beta-NaGdF4:Eu<3+> red fluorescent powder and a preparation method thereof. Beta-NaGdF4:Eu<3+> microcrystals are prepared by taking L-lysine as an auxiliary agent and adoptinga one-step hydrothermal method. The morphology of betaNaGdF4:Eu<3+> microcrystals is regulated and controlled by controlling the concentration of L-lysine molecules in an aqueous solution of L-lysineand the dosage of the aqueous solution of L-lysine, so that the beta-NaGdF4:Eu<3+> red fluorescent powder prepared by the method can meet special requirements on material structures in different purposes. In conclusion, the preparation method provided by the invention has the advantages of simple and convenient operation method, high yield and mild conditions, and has a large-scale production prospect, and the beta-NaGdF4:Eu<3+> red fluorescent powder prepared by the method has excellent luminescence and paramagnetic properties, and can be used as a luminescent material and a magnetic material.
Owner:NORTHEASTERN UNIV LIAONING
Magnetic microsphere and preparation method thereof
InactiveCN111036178AGood paramagnetismImprove adsorption capacityOther chemical processesWater contaminantsMicrospherePhysical chemistry
The invention relates to the technical field of sewage treatment, particularly to a magnetic microsphere and a preparation method thereof. The preparation method comprises the following steps: preparing ferrofluid from ferric trichloride and ferrous chloride under a certain condition; adding Fe3O4 into dissolved CTS-Lys, and dissolving to obtain a CTS-Lys solution; and dropwisely adding the CTS-Lys solution into the ferrofluid, and carrying out a mixing reaction to obtain the magnetic microspheres. According to the invention, the surfaces of the CTS-Lys magnetic microspheres are provided witha large number of amino groups, the CTS-Lys magnetic microspheres have good paramagnetism and high adsorbability to various heavy metal ions (such as Cu<2+>, Ba<2+>, Cr<3+> and the like), and the CTS-Lys magnetic microspheres can carry the captured heavy metal ions to move in a directional mode by changing a magnetic field so as to finally complete sewage treatment.
Owner:深圳容金科技有限公司
A kind of gadolinium-based metal fullerene water-soluble nitrene derivative and its preparation method and application
ActiveCN109568607BExtended Product LibraryThe synthesis process is simpleIn-vivo testing preparationsMagnetic resonance imaging contrast mediumPhysical chemistry
The invention discloses a water-soluble nitrobene derivative of gadolinium-based metal fullerene, a preparation method and application thereof. The gadolinium-based metal fullerene water-soluble nitrobene derivative is made of paramagnetic gadolinium-based metal fullerene Gd a N b @C 2n with azide N 3 (CH 2 ) m NH 2 or N 3 (CH 2 ) m‑1 COOH is prepared by nitrobin reaction, and its general structural formula is as follows: Gd a N b @C 2n [N(CH 2 ) m NH 2 ] x or Gd a N b @C 2n [N(CH 2 ) m‑ 1 COOM] x In the general structural formula above, a=1~3; b=0~3; n=30~45; m=2~6; x=8~30; M is H, NH 4 , Na or K. The invention provides a method for preparing gadolinium-based metal fullerene water-soluble nitrene derivatives through nitrene reaction. The gadolinium-based metallofullerene water-soluble nitrene derivatives have good water solubility and good paramagnetic properties, and can be used as magnetic resonance imaging contrast agents. When used in MRI imaging, the contrast enhancement effect is very significant. Medical diagnosis and treatment, especially in MRI image-guided diagnosis and treatment, has an important application prospect.
Owner:HENAN AGRICULTURAL UNIVERSITY
Near-infrared long afterglow luminescent material and preparation method thereof
ActiveCN111139075BHigh imaging sensitivityGood paramagnetismLuminescent compositionsRare-earth elementBiological imaging
The invention relates to a near-infrared long afterglow luminescent material and a preparation method thereof. The chemical composition expression of the material is Na 0.5 Ln 0.5 Ti 1‑x O 3 :xCr 3+ , where 0.001%≤x≤0.03%, and Ln selects Gd, La or Y. The content of Cr in this doping range can significantly enhance the afterglow intensity of the material, the luminescence wavelength of the material is in the range of 650-1050nm, the main peak is around 760nm, which is within the biological transparency window, and has good biological tissue penetration; The material can be effectively activated by deep red light and near-infrared light of 650-850 nm, and the reactivation of in vivo markers by external light source can be conveniently realized at any time. In addition, when the rare earth element Gd is selected, the long afterglow property can be quickly activated under the excitation of low-power low-energy light, and the material provided by the present invention has a high initial near-infrared afterglow intensity, high work efficiency, and high imaging sensitivity. At the same time, the material has good paramagnetic properties and can be used as a marker for magnetic resonance imaging to realize optical / magnetic resonance dual-function biological imaging.
Owner:JINAN UNIVERSITY
A kind of magnetic citric acid modified chitosan microsphere and its preparation method and application
ActiveCN111001396BGood water solubilityImprove adsorption capacityOther chemical processesWater contaminantsEngineeringAqueous solubility
The invention discloses a preparation method of magnetic citric acid modified chitosan microspheres, comprising (1) preparing water-based Fe 3 o 4 Nano magnetic material; (2) preparing citric acid modified chitosan; (3) preparing magnetic citric acid modified chitosan microspheres. By modifying chitosan with citric acid, chitosan and citric acid undergo acylation reaction to form secondary amide products and introduce carboxyl groups, which can not only increase the water solubility of chitosan, but also improve the resistance of chitosan to Adsorption properties of metal ions. The magnetic citric acid modified chitosan microspheres prepared by the invention can realize high-efficiency removal of Cr(VI) in waste water, and can also be regenerated and reused.
Owner:SOUTHWEST PETROLEUM UNIV +1
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