379 results about "Fe3o4 nanoparticles" patented technology

The invention provides phase-change energy storage heat-insulation solid wood. The wood comprises a solid wood component, wherein magnetic Fe3O4 nanoparticles are formed in a conduit and a cell cavity of the solid wood component through in-situ attached growth, and the conduit and the cell cavity are filled with composite phase-change energy storage materials of polyethylene glycol 600 and polyethylene glycol 800; and a protective coating is painted on the surface of the heat-insulation solid wood. The heat-insulation solid wood is capable of absorbing heat to withstand excessive rise of an indoor temperature during the day, releasing phase-change latent heat for thermal retention and cold dispelling during the night, and maintaining a human body within a comfort temperature range. The invention further provides a manufacturing method of the heat-insulation solid wood. The method comprises the steps of firstly processing the solid wood component according to the required dimension; carrying out degreasing and drying pretreatment on the solid wood component, forming the magnetic Fe3O4 nanoparticles in the solid wood component through in-situ attached growth and then impregnating and filling the composite phase-change energy storage material of the polyethylene glycol 600 and the polyethylene glycol 800; and finally carrying out sanding shaping and painting the protecting coating. According to the manufacturing method, the process is simple and the cost is low.

The invention provides an inorganic nanoparticles-modified polyurethane sponge mask material and a preparation method thereof, and also provides application of the inorganic nanoparticles-modified polyurethane sponge mask material in manufacturing a mask. In the invention, the inorganic nanoparticles used for modifying sponge comprise magnetic Fe3O4 nanoparticles, magnetic Fe2O3 nanoparticles, TiO2 nanoparticles, ZnO nanoparticles, mesoporous SiO2, carbon nanotubes and carbon fibers. The inorganic nanoparticles have the advantages of small particle size, large specific surface area, strong adsorption performance and like and contain charges on the surfaces, and a plurality of the nanoparticles have strong ultraviolet absorption capability, photocatalytic activity, and antibacterial and antiviral actions. The inorganic nanoparticles-modified polyurethane sponge mask material provided by the invention has high efficiency and capability in filtering out sub-micron dust, viruses and bacteria, has the function of adsorbing poisonous and harmful gases, has the characteristics of small gas absorption resistance, simple preparation method, low cost and broad application future, and can be recycled through water washing.

The invention discloses a photonic crystal thin film as well as a preparation method and application thereof. The photonic crystal thin film comprises Fe3O4 nanoparticles and polyacrylamide hydrogel, and the Fe3O4 nanoparticles are uniformly dispersed in the 1mg / ml-50 mg / ml polyacrylamide hydrogel. The preparation method comprises the following steps: (1) uniformly dispersing Fe3O4 nanoparticles, acrylamide, methene acrylamide and photon initiator into an organic solution, to obtain a hydrogel photon crystal suspension; (2) paving the hydrogel photon crystal suspension into a 150-300mu m thin film, loading a magnetic field of 300-2000 gaussian so as to develop the thin film, and then curing; and (3) soaking the cured crystal thin film in water, and replacing the organic solvent, thus obtaining the photonic crystal thin film. The thin film has sensitive solvent response and mechanical response capability, the preparation is fast, and the photonic crystal thin film can be used for naked-eye detection.

The invention relates to a preparation method of a magnetic chitosan adsorbent. The preparation method specifically comprises steps as follows: firstly, magnetic Fe3O4 nanoparticles are prepared witha hydrothermal method; the surfaces of the Fe3O4 nanoparticles are coated with SiO2 with a tetraethoxysilane hydrolysis method, and a compound magnetic carrier Fe3O4@SiO2 is prepared; finally, a magnetic core is coated with a chitosan crosslinking method, and a magnetic Fe3O4@SiO2-CS composite, namely, a high-adsorption magnetic chitosan adsorbent is prepared. The method is simple and has low requirements for equipment, and the prepared adsorbent has higher removal rate and higher adsorption capacity for toxic Cr(VI) in water and has the removal rate reaching 99.6% and the adsorption capacityreaching 49.8 mg / g for a 50 mg / L Cr(VI) solution; the adsorbent has the maximum adsorption capacity reaching 82% for a 800 mg / L Cr(VI) solution; besides, the adsorbent adsorbing Cr(VI) can be separated from water through an external magnetic field, the problem of complicated separation and recovery process of a powdery adsorbent is effectively solved, and the separation efficiency is greatly improved.

A nano-class magnetic composite Fe3O4 / polystyrene material is prepared through mixing the aqueous solution of two-valence Fe salt with that of three-valence one, adding alkali solution containing surfactant, reacting to obtain Fe3O4 nanoparticles, and ball grinding for dispersing them in styrene monomer while polymerizing reaction.

A composite nanoparticle as the magnetic core carried photocatalyst is composed of the magnetic Fe3O4 nanoparticle as core, SiO2 coated on the surface of said core, and TiO2 carried by said SiO2 / FeO4 particle, and is prepared by chemical codepositing method. A method for using said photocatalyst to clean sewage features that the organic pollutants in sewage is deeply oxidized by it to generate CO2 and H2O. Its photocatalyzing apparatus is composed of high-pressure Hg lamp, quartz sleeve tube, bias electrode, condensing water inlet and outlet, gas distributing plate, said photocatalyst, ring reaction chamber, organic class container, sampling opening and aerating unit.

The invention relates to a method for preparing a TiO2 / PS / Fe3O4 magnetic nanoparticle photocatalyst, comprising the following steps of: (1) preparing oleic acid modified Fe3O4 nanoparticles; (2) preparing an aqueous-phase magnetic fluid; (3) preparing styrene miniemulsion; (4) preparing magnetic polystyrene beads PS / Fe3O; and (5) preparing the magnetic photocatalyst TiO2 / PS / Fe3O4, which specifically comprises the following steps of: mixing absolute ethyl alcohol with tetra-n-butyl titanate, and performing magnetic stirring to form a solution A; adding the magnetic polystyrene beads PS / Fe3O to de-ionized water and performing ultrasonic treatment to form a solution B; under magnetic stirring, adding the solution A to the solution B, thereby obtaining sol after 30-40 min, wherein TiO2 covers the PS / Fe3O at the moment; after condensing and refluxing the sol in a water bath, filtering the sol to obtain the TiO2 / PS / Fe3O4, washing the TiO2 / PS / Fe3O4 by using ethanol, filtering, washing by using distilled water and filtering, thus obtaining a solid; and drying the solid until the weight thereof is constant, thereby obtaining the magnetic photocatalyst TiO2 / PS / Fe3O4 with the polystyrene PS as an isolating layer, the Fe3O4 as a magnetic core and the TiO2 as a shell. The product obtained by using the method is low in energy consumption, high in catalytic activity and recyclable.

The invention discloses a nano-drug carrier with the magnetothermal and photothermal effects. The particle size is 50 nanometers to 300 nanometers, and the nano-drug carrier is prepared from mesoporous silica particles, Fe3O4 nanoparticles embedded into the mesoporous silica particles and graphene oxide with which the surfaces of the mesoporous silica particles are coated. The invention further provides a preparation method of the nano-drug carrier. The superparamagnetic Fe3O4 nanoparticles are prepared through a solvothermal method, the Fe3O4 nanoparticles are composited by taking hexadecyl trimethyl ammonium bromide as a structure-directing agent and taking tetraethoxysilane as a silicon source through the sol-gel self-assembling process, and then magnetic mesoporous nanoparticles Fe3O4 / mSiO2 with the magnetic property adjustable and controllable are prepared; the surfaces of the Fe3O4 / mSiO2 mesoporous nanoparticles are coated with graphene through the ion interaction or electrostatic interaction or hydrogen-bond interaction, and then the nano-drug carrier which both can efficiently deliver anti-cancer drugs and has the magnetothermal and photothermal effects is obtained. Accordingly, cancer treatment in which medical chemotherapy cooperates with magnetothermal and photothermal treatment can be achieved.

The invention relates to a preparation method of superparamagnetic composite microballoons used in biomedicine. First, a coprecipitation method is used to prepare superparamagnetic Fe3O4 nanoparticles, and after modified by a surfactant, the prepared Fe3O4 nanoparticles are dispersed into deionized water to form a water-based magnetic liquid. Second, inorganic / organic core shell microballoons with carboxyl function groups on surfaces are prepared. The superparamagnetic composite microballoons are of an inorganic / organic core shell structure, have composite material characteristics and biological effects. The microballoons have active function groups on the microballoon surfaces, and therefore can be combined with a plurality of biologically-active substances. The magnetic microballoons prepared by the method of the invention have active carboxylic groups on the microballoon surfaces, and have superparamagnetism and a large magnetic content, and therefore the microballoons are subject to magnetization separation under an externally applied magnetic field and can lose magnetism immediately after the magnetic filed is removed. The magnetic microballoons prepared in the invention can be widely applied in the detection and separation operation of tumor cells in the field of biomedicine. The method has simple experimentation, is rapid, and has low cost.

The invention provides a preparation method of magnetic fluorescent composite nanospheres. The preparation method comprises the steps of (1) preparing CdSe quantum dots by taking Na2SO3, selenium powder, cadmium acetate, N-acetylcysteine and deionized water as raw materials; (2) with FeCl3.6H2O sodium acetate anhydrous and ethylene glycol as raw materials, reacting in an autoclave to obtain Fe3O4 nanoparticles; (3) preparing a Fe3O4@SiO2 product by taking the Fe3O4 nanoparticles, tetraethoxysilane, absolute ethyl alcohol, deionized water and ammonium hydroxide as raw materials; and (4) conducting amino modification on the surface of the Fe3O4@SiO2 by utilizing a silane coupling agent KH-550, then loading CdSe onto the surface of the SiO2 through reaction, so as to obtain the final product magnetic fluorescent composite nanospheres. The preparation method has the characteristics that the prepared CdSe quantum dots have excellent water solubility and excellent fluorescent property and are about 3-4nm in diameter; the Fe3O4 nanoparticles are even in particle size and have good dispersity; the Fe3O4@SiO2 nanoparticles have an obvious core-shell structure, shell layers are evenly coated and are consistent in thickness; the magnetic fluorescent composite nanospheres has strong magnetism and excellent fluorescence property and can be used for site-specific drug transportation in a biological body and the fluorescence imaging of the biological body.

The invention discloses an intelligent hydrogel as well as a preparation method and an application thereof and a hydrogel. The intelligent hydrogel is P(NIPAM-co-CS) / Fe3O4 and comprises iron oxide, N-isopropyl acrylamide and chitosan. The preparation method comprises the following steps: dissolving FeCl2.4H2O and FeCl3.6H2O in a mixed solvent of ethanol and water and reacting to prepare hydrophilic Fe3O4 nanoparticles under the protection of nitrogen and by adopting ammonia water as a precipitating agent; ultrasonically dispersing the prepared Fe3O4 nanoparticles in a chitosan liquid, adding a temperature-sensitive monomer N-isopropyl acrylamide and in the presence of a crosslinking agent and an initiator and by adopting tetramethylethylenediamine as an accelerator, carrying out polymerization reaction to prepare the intelligent hydrogel P(NIPAM-co-CS) / Fe3O4 by virtue of a micro-emulsion polymerization method. The intelligent hydrogel can be applied in the preparation of a water body heavy metal ion adsorption-desorption agent for removing heavy metal ions in water body.

The invention discloses Fe@Fe3O4 nanoparticles having a photothermal function, and a preparation method and an application thereof, and belongs to the field of medical science materials. The preparation method is significantly characterized by comprising: firstly, utilizing octadecene as a solvent, utilizing Fe(CO)5 as an iron source, utilizing oleyl amine as a surfactant and a stabilizer, and preparing an Fe nanomaterial having good dispersity by high temperature pyrolysis; sequentially, adding (CH3)3NO at the high temperature for oxidization to form one layer of Fe3O4 shell on the surface layer of each Fe nanoparticle, and then improving water solubility by a ligand exchange method to obtain the Fe@Fe3O4 composite material as a photothermal reagent and having high magnetization strength. The composite material has the advantages of uniform particle size, high saturation magnetization strength, and controllable morphology, and has excellent dispersion and excellent stability in aqueous solution. The reaction time is short, the raw materials are easy to get, and operation processes are convenient. On the basis of the raw materials, the Fe@Fe3O4 nanoparticles are developed to connect PEG to the surface of the material, so that the Fe@Fe3O4 nanoparticles can be applied to biological bodies. The invention provides the application of the Fe@Fe3O4 nanoparticles in the field of tumor photothermal therapy.

The invention belongs to a method for preparing paramagnetic Fe3O4 nanoparticles by using iron tailings. The method comprises the following steps of: dissolving the iron tailings in a hydrochloric acid solution, filtering, and washing to realize solid-liquid separation; adding hydrogen peroxide into filtrate to oxidize Fe<2+> into Fe<3+>, adding ammonia water to regulate the pH to be 3.2, and ensuring that only Fe<3+> ions in various metal ions in the filtrate are precipitated in a form of Fe3 to separate iron; dissolving the Fe3 precipitate obtained through separation by using hydrochloric acid, adding a Fe<2+> solution, ensuring that a molar ratio of Fe<3+> to Fe<2+> in the solution is 1.5:1-1.75:1, performing coprecipitation reaction under the action of an alkali solution precipitator to obtain Fe3O4 nanoparticles, and performing ultrasonic dispersion and surfactant modification to make the prepared Fe3O4 nanoparticles have high purity, the particle size of less than 20nm, uniform particle distribution, high particle dispersibility, superparamagnetism and the saturation magnetization of 74.86emu / g. The invention provides a way for recycling waste iron tailings; and the method is easy to implement and low in cost, the environmental burden is effectively reduced, and the added value of waste resources can be improved.

A microspherical medium of ferromagnetic urea-formaldehyde resin is composed of the urea-formaldehyde resin with 0.5-20 microns of granularity and uniformly dispersed Fe3O4 nanoparticles (0.1-200 nm). Its preparing process includes preparing magnetic fluid, preparing its sol, separating and preparing magnetic microspheres. Its advantages are simple and easily controllable process and high stability.

The invention relates to a sulfate radical sorbent magnetic nanometer zirconium hydroxide and a preparation method thereof. The preparation method comprises the following steps: (1), modifying magnetic Fe3O4 nanoparticles; (2), under mechanical stirring, firstly, quickly dripping a ZrOC12 solution in a Fe3O4 suspending liquid, then slowly dripping an ammonia solution until the pH value is 9-10, followed by standing and aging so as to obtain wet sol sedimentation, and finally performing sedimentation washing and suction filtration; and (3), dissolving the wet sol in a n-butanol for azeotropic distillation, vacuum drying after the termination of the distillation, and extracting for grinding and sieving so as to obtain the sulfate radical sorbent magnetic nanometer zirconium hydroxide. According to the invention, the solid-liquid separation is easily realized after the adsorption of the sulfate radical sorbent; the magnetic field solid-liquid separation is simpler and convenient; and the water basically has no residual after the sulfate radical is desorbed, and the adsorption effect is good.

The invention relates to magnetic composite nanoparticles with a multilayer nuclear-shell structure and Fe3O4 nanoparticles being wrapped by triblock copolymer as well as the application of the magnetic nanoparticles which are taken as drug carriers. A first block of the triblock copolymer is methoxyl polyethylene glycol, a second block of the triblock copolymer is random copolymer of crylic acidand acrylic ester, or random copolymer of methacrylic acid and methacrylic acid ester; and a third block of the triblock copolymer is polyacrylic acid monoglyceride or polymethylacrylic acid monoglyceride, wherein the third-block polymer is combined with the surface of the Fe3O4 nanoparticles; drugs with amino groups or amido groups, such as amycin, can be loaded on a polyanion layer at the sub-outer layer of the composite nanoparticles; and the loaded drugs are not released under the neutral conditions and released when the pH value is below 5.5.

The invention relates to a folic acid coupled targeted ferriferrous oxide / mesoporous silica / copper sulfide nano-composite particle as well as a preparation method and an application thereof. The nano-composite particle consists of Fe3O4@mSiO2 core-shell structural nanoparticles, wherein the core-shell structural nanoparticles take Fe3O4 nanoparticles as cores and mSiO2 as shells, and copper sulfide nanoparticles and folic acid cover the surfaces of the shells; the folic acid is grated on one part of the mesoporous silica (mSiO2) and the copper sulfide particles are loaded on the other part of the mesoporous silica; and polyethylene glycol is grated on the surface of the copper sulfide nanoparticles. Compared with the prior art, the nano-composite particles disclosed by the invention has a broad application prospect in the aspects of nuclear magnetic resonance imaging, drug loading and photothermal therapy; anti-cancer drugs and photothermal reagents can be transmitted to tumor parts in a targeted mode; the nano-composite particle can reduce toxic and side effects on normal tissues and cells, and meanwhile, the nano-composite particle can effectively kill cells, so that a treatment effect is further improved; and moreover, the nano-composite particle is relatively low in preparation condition demand and cost.

The invention discloses a morphology-controllable and color angle-independent photonic crystal particle and its preparation method. The preparation method comprises the following steps: mixing Fe3O4 nanoparticles, carbon black nanoparticles, graphene nanoparticles or a mixture of the Fe3O4 nanoparticles, carbon black nanoparticles and graphene nanoparticles with an emulsion containing monodisperse colloidal microspheres; printing a mixture obtained onto a superhydrophobic substrate by a spraying, dispensing or inkjet mode so as to form emulsion droplets with diameter being 11microns -1.6 mm; and drying to obtain the ellipsoidal color angle-independent colored photonic crystal particle with its length-diameter ratio being controllable. The photonic crystal particle is colourfast and environmentally friendly and has a wide application prospect in fields of pigment, display, sensing and the like.

The invention belongs to powder preparation field, more particularly relates to a method for preparing spherical magnetic Fe3O4 nanoparticles by using the coprecipitation method of a solution layer. The method comprises the steps of: forming a solution layer from the mixed alcohol solution of ferric salt and ferrous salt on a stainless steel band in a sealed container, and adding ammonia gas as precipitant to react with reactant in the solution layer to generate spherical Fe3O4 particles. In the reaction, the presence of water molecules is reduced to effectively obviate particle agglomeration. The thickness of the solution layer can be adjusted by applying the solution, and the diameter of the Fe3O4 particle can be controlled to a range from several nanometers to dozens of nanometers by controlling the concentration of the reactant alcohol solution and the thickness of the solution layer, thereby achieving good dispersivity.

The invention relates to a method for preparing rapamycin / magnetic carboxymethyl chitosan nano drug-loaded microspheres. According to the method, synthesized Fe3O4 nanoparticles are added to liquid paraffin oil, the liquid paraffin oil is then mixed with carboxymethyl chitosan liquid, a crosslinking agent is added, nanospheres are collected through magnetic separation, and magnetic carboxymethyl chitosan nanospheres are obtained through washing and drying; aqueous dispersion liquid is prepared by using the obtained magnetic carboxymethyl chitosan nanospheres, rapamycin is dissolved in acetonitrile, and stirring is carried out so as to mix the rapamycin and the acetonitrile; and magnetic separation is carried out, a lower layer of precipitate is washed by using ultrapure water, and the rapamycin / magnetic carboxymethyl chitosan nano drug-loaded microspheres are obtained through freeze-drying and crushing. The nano drug-loaded microspheres prepared by the method have the characteristics of strong targeting, high drug loading capacity, good slow release performance, small particle size, low drug toxic and side effect and the like, and the tumor cell killing rate of rapamycin drugs can be remarkably increased; and the method is simple in process, mild in preparation conditions and easy in scale production.

The invention discloses a preparation method of a Ag / Fe3O4 / nano-cellulose tri-element composite material. Nano-cellulose is used in the preparation method and plays a role as a reducing agent, and improving of binding strength between Ag and Fe3O4 nanoparticles is facilitated. The preparation method is environment-friendly, pollution-free and high in reaction selectivity and reaction efficiency; water is used as a solvent, so that the preparation method is wide in raw material source and low in cost, and production cost is lowered. The Ag / Fe3O4 / nano-cellulose tri-element composite material can be prepared through a hydrothermal method and a microwave hydrothermal method, so that industrialization is facilitated.

The invention discloses a preparation method of a nano magnetic core-shell catalyst for degrading dye wastewater. The preparation method comprises the following steps of: (1) preparing Fe3O4 nanoparticles by a coprecipitation method; (2) putting the Fe3O4 nanoparticles into 0.05 to 0.5 mol / L of FeSO4 solution, controlling the amount ratio of the Fe3O4 to the FeSO4 to be (1:3) to (1:8) and adding alkali until the pH of a reaction system is between 6 and 8; (3) adding 0.01 to 0.5 mol / L of KMnO4 solution at a low dripping speed, controlling the pH of a control system constant in a dripping process and reacting at the temperature of between 50 DEG C and 80 DEG C for 3 to 6 hours; and (4) after the reaction is finished, filtering, separating, washing with deionized water and drying an obtained product at the temperature of between 70 DEG C and 110 DEG C for 10 to 16 hours so as to obtain the nano magnetic catalyst with a core-shell structure. The catalyst has high catalytic activity under acid, nearly neutral and alkali condition, can effectively degrade methylene blue serving as an organic dye in water, has magnetism, and is easy to recycle.

The invention discloses a release mass transfer rate adjustable and controllable intelligent drug delivery carrier, which is a hollow spherical microcapsule. A membrane of the microcapsule mainly comprises poly[methacrylic-N, N-dimethylamino ethyl ester], super-paramagnetic Fe3O4 nanoparticles and poly(N-isopropyl acrylamide) temperature-sensitive sub-microspheres or poly[N-isopropyl acrylamide-copoly-acrylamide-copoly-allyl amine] temperature-sensitive sub-microspheres. A process for preparing the drug delivery carrier comprises the following steps of: (1) preparing the temperature-sensitivesub-microspheres; (2) preparing modified super-paramagnetic Fe3O4 magnetic fluid; (3) preparing intermediate phase fluid, inner phase fluid and outer phase fluid; and (4) preparing the drug delivery carrier.

The invention relates to a preparation method of a ferroferric oxide (Fe3O4) nanobelt in a network structure, belonging to the technical field of the preparation of nanomaterial. In the prior art, the Fe3O4 nanoparticles, nanorods, nanowires, nanofilms, hybrid structures, nanocrystalline in a core-shell structure and nanofibers are prepared. In the invention, the Fe3O4 nanobelt in the network structure is prepared by adopting the electrostatic spinning technology and the hydrogen thermal reduction technology. The preparation method of theFe3O4 nanobelt in the network structure comprises the following steps: (1) preparing a PVP / Fe(NO3)3 composite nanobelt by adopting the electrostatic spinning technology; (2) preparing an alpha-Fe2O3 nanobelt by carrying out thermal treatment to the PVP / Fe(NO3)3 composite nanobelt; and (3) carrying out thermal reduction to the alpha-Fe2O3 nanobelt by the mixed gas of hydrogen and nitrogen to obtain the Fe3O4 nanobelt in the network structure. The Fe3O4 nanobelt in the network structure has a good crystal type, has the width of about 3.5mu m, the thickness about 50nm and the length of more than 50mum. The preparation method of the Fe3O4 nanobelt in the network structure is simple and practical, can be used for bath production and has wide application prospect.

The invention discloses methods for preparing carboxymethyl chitosan magnetic microspheres and adsorbing cadmium in oyster meat by using the carboxymethyl chitosan magnetic microspheres. Carboxymethylchitosan and Fe3O4 nanoparticles are adopted to be dispersed in organic solvent added with emulsifying agent, coprecipitation is formed after adding sodium sulfate, treatment is conducted by using crosslinking agent, and then the carboxymethyl chitosan magnetic microspheres are prepared after washing and drying. Oyster shells are opened for taking out meat, after adding water and beating, the pHis adjusted, then the meat is mixed with the magnetic microspheres so as to adsorb cadmium in the oyster meat, and the used magnetic microspheres can be regenerated after the removal of the cadmium byadded EDTA. The application of the invention can solve the difficult problem of cadmium pollution in the oysters, and promote the effective utilization of shellfish resources.

The invention relates to a method for preparing a glucose difunctional monomer magnetic molecularly imprinted polymer, relates to a method for preparing a glucose molecularly imprinted polymer, and aims to solve the problem that a glucose molecularly imprinted polymer prepared from a difunctional monomer is not available at present. The method comprises the following steps: I, preparing aqueous superparamagnetism Fe3O4 nanoparticles; II, modifying the Fe3O4 nanoparticles; III, performing silanization on the Fe3O4 magnetic nanoparticles; IV, performing amination on the Fe3O4@SiO2 particles; V, preparing difunctional monomer magnetic nanoparticles; VI, synthesizing the glucose difunctional monomer magnetic molecularly imprinted polymer. The maximum saturated adsorbing capacity of Glucose@MIP to glucose is 9.111mg / g, the saturated adsorbing capacity of MNIPs is 3.112mg / g, the printing factor is up to 2.92, and after five times of repeated adsorption, the adsorbing capacity is only reduced by 5.9%.

The invention provides a preparation method of a ferromagnetic nanoparticle supported rhodium complex hydroformylation catalyst. The method comprises the following step: bonding a rhodium complex to the surface of the superparamagnetic Fe3O4 nanoparticles by a bridging ligand to obtain the ferromagnetic nanoparticle supported rhodium complex hydroformylation catalyst. The invention provides a catalyst prepared by the method and application of the catalyst in hydroformylation reaction. According to the SPION-Rh catalyst, the nanoparticles with huge surface area are combined with rhodium to construct the nano catalytic cluster, thereby being beneficial to enhancing the catalytic efficiency. The catalyst has favorable activity in hydroformylation reaction. After introducing the magnetic particles, the metal rhodium can be simply recovered by applying an external magnetic field, thereby easily solving the problem of difficulty in recovery of rhodium in the homogeneous catalysis in industry.

The invention discloses a preparation method of L-proline-loaded temperature / magnetism double responsive functional hybrid microspheres. The technical point is as follows: a temperature-sensitive amphipathic block polymer is obtained by polymerizing functional L-proline ProlA, a temperature-sensitive monomer N-isopropylacrylamide NIPAM and a hydrophilic monomer oligomeric ethylene glycol acrylate OEGA by virtue of a reversible addition fragmentation chain transfer (RAFT) polymerization method and is loaded to magnetic Fe3O4 nanoparticles by virtue of a ''click chemistry'' method so as to obtain the temperature / magnetism double responsive hybrid microspheres. The hybrid microspheres can be used for catalyzing direct asymmetric Aldol reaction in a water phase, and the temperature of a reaction system is higher than a lower critical solution temperature (LCST) of the block polymer, so that the improvement of the catalytic efficiency of the Aldol reaction and the release of organic products are benefited; and by virtue of the magnetism, the hybrid microspheres can be efficiently separated and recycled and repeatedly used.