237 results about "Magnetic composite" patented technology

The invention discloses a plate flexible laser cutting production line and method integrating uncoiling, flattening and robot grabbing, and belongs to the technical field of metal plate machining. The plate flexible laser cutting production line comprises the steps that S1, an uncoiling and flattening mechanism, a gas-magnetic composite suspension bed and a sorting robot with a Bernoulli gripper are configured; s2, the coiled materials are fed into a suspension bed, the levelness is locked through permanent magnet attraction, and non-contact suspension and locking flat conveying of the plates are achieved in cooperation with the lifting force of a micropore air cushion; s3, laser head follow-up cutting is carried out, and plate local warping caused by thermal stress release is restrained through a permanent magnetic field; and S4, negative pressure lift force is generated through the Bernoulli effect, and when the lift force overcomes the resultant force of the magnetic attraction force, the gravity and the friction force, the workpiece is separated from the crawler belt and stripped from the framework. The air-magnetic composite suspension bed is constructed, the permanent magnet array is used for generating downward background magnetic attraction force, meanwhile, the high-pressure air bellow is used for spraying airflow through the micropore array to generate air cushion lift force, the plate is in a non-contact suspension state, and the risk of surface scratching is remarkably reduced.

The invention belongs to the technical field of preparation of soft magnetic composite materials, and particularly relates to an insulation coating method and application of a soft magnetic powder material. The insulating coating method comprises the following steps: (1) uniformly mixing low-melting-point metal or alloy powder with silica sol, a silane coupling agent and a thermocuring resin glue solution to obtain coating slurry; and (2) uniformly mixing soft magnetic powder with the coating slurry obtained in the step (1), firstly performing hot-pressing curing molding at the temperature of 60-100 DEG C under a vacuum condition, and then performing hot-pressing sintering treatment at the temperature higher than the melting point temperature of low-melting-point metal or alloy powder and under an oxygen-containing atmosphere condition to obtain the insulated and coated soft magnetic powder material. According to the insulating coating method, the advantages of an organic material insulating coating method and an inorganic material insulating coating method are combined, the defects of the organic material insulating coating method and the inorganic material insulating coating method are overcome, and the stability and the insulating coating effect of the insulating coating layer are remarkably improved.

The invention designs a preparation method of a magnetic molecular imprinting-aptamer sandwich fluorescence sensor for detecting kanamycin. And the magnetic molecular imprinting composite material Fe3O4 (at) UiO-66 (at) MIP with a specific adsorption target object KANA is prepared. When a detection target object KANA exists, the Fe3O4-coated UiO-66-coated MIP can rapidly and specifically capture the KANA in a short time. Then, a DNA single-stranded aptamer marked with FAM is added, after the aptamer and KANA captured on the surface of the Fe3O4 at-UiO-66 at-MIP are subjected to specific recognition and magnetic separation again, an aptamer probe can enter sediment along with the magnetic composite material Fe3O4 at-UiO-66 at-MIP, the fluorescence intensity of supernate is reduced, and quantitative analysis is conducted according to the fluorescence difference value delta F. When the KANA does not exist, the aptamer cannot enter the precipitate, so that the fluorescence signal intensity is not changed. Double recognition is formed through specific binding of an MIP imprinting cavity and the aptamer, matrix interference is reduced by means of fluorescence characteristics and magnetic separation capacity, the method has the advantages of being high in adsorption capacity, specific in recognition, high in sensitivity, wide in detection range, good in selectivity and the like, and rapid and accurate detection of KANA in a complex sample can be achieved.

The invention belongs to the technical field of bionic cilium sensors, and particularly discloses a magnetic bionic cilium and vesicle complex and a preparation method and application thereof.The preparation method comprises the following steps that S1, a cilium array male mold is prepared; then carrying out oxygen plasma treatment, silanization and curing stabilization; s3, injecting the magnetic composite precursor into a polydimethylsiloxane female die, applying pressure, and striking off; and S4, coating the mold surface with an Ecoflex precursor, performing thermocuring forming, performing magnetization treatment, and performing stripping to obtain the magnetic bionic cilia. According to the magnetic bionic cilia, the vesicle complex and the preparation method and application of the magnetic bionic cilia, the vesicle complex and the preparation method and application of the magnetic bionic cilia, high-magnetic signal output is achieved while the deformability of the cilia is guaranteed, the magnetic bionic cilia is used for non-contact real-time hemodynamic monitoring, meanwhile, specific response release of the vesicle complex is achieved, and a new thought is provided for design of responsive vascular implants.

The invention discloses a high-insulativity coating treatment method of a metal soft magnetic composite material, which belongs to the technical field of metal soft magnetic materials, and comprises the following steps: firstly, performing vacuum dehydration treatment on metal soft magnetic powder, and controlling the moisture content to be not higher than 0.1%; carrying out ultrasonic dispersion treatment on the boron nitride nanosheets to form a suspension, and modifying the magnesium borate nanowires and a silane coupling agent for later use; preparing an inorganic coating solution and an organic coating solution; activating the powder in the fluidized bed by adopting radio frequency plasma of argon-oxygen mixed gas; enabling the activated powder to enter a three-fluid nozzle fluidized bed reactor, and implementing synchronous spray coating in two stages: in the first stage, spraying inorganic coating liquid and applying pulse plasma to form a composite bottom layer; in the second stage, spraying organic coating liquid and carrying out ultraviolet precuring to form a resin layer; and the coated powder is treated by a stepped thermocuring procedure to obtain a finished product. The technical problem of how to improve the insulation coating performance of the metal soft magnetic composite material is solved.

The application provides a quartz sand acid washing waste liquid resource treatment method, and belongs to the field of industrial waste water treatment, and comprises the following steps: adding magnetic composite seeds to the quartz sand acid washing waste liquid, and performing magnetic separation after stirring treatment; adding soluble potassium salt to the treated waste liquid to recover potassium fluosilicate; treating the filtrate through diffusion dialysis to obtain recovered acid and dialysis residual liquid; the diffusion dialysis treatment adopts an asymmetric membrane, the asymmetric membrane has a physical gradient of one side being a dense structure and the other side being a loose structure, and the dense structure side is in contact with the waste liquid; and adding calcium oxide or calcium hydroxide to the dialysis residual liquid for deep treatment and calcium recovery. The application provides a quartz sand acid washing waste liquid resource treatment method which is low in treatment cost, high in resource recovery rate and friendly to the environment, and realizes the differentiated resource recovery of the quartz sand acid washing waste liquid.

The invention discloses a FeNi soft magnetic composite material based on tetrabutyl orthosilicate hydrolysis coating and a preparation method of the FeNi soft magnetic composite material. According to the method, through a controllable sol-gel process, tetrabutyl orthosilicate is hydrolyzed to generate SiO2 gel, then a uniform and ultrathin SiO2 gel layer is generated on the surface of FeNi powder in situ, and then heat treatment densification is performed to obtain the FeNi soft magnetic composite material coated with SiO2 in an insulation mode. The SiO2 insulating layer is firmly combined with the matrix metal powder, the thermal stability is good, high frequency and high resistivity are achieved, and meanwhile dilution of non-magnetic relative magnetic performance is reduced to a great extent. The final magnetic core is obtained through compression molding and annealing heat treatment, has the excellent characteristics of high effective magnetic conductivity and low high-frequency magnetic core loss, and is particularly suitable for various efficient and miniaturized power electronic devices in the MHz frequency band.

The application provides a semiconductor structure preparation method, a semiconductor structure and a memory. The semiconductor structure preparation method comprises the following steps: providing a substrate; sequentially forming a magnetic composite layer and a transfer mask layer on the substrate; performing a plurality of mask etching processes on the transfer mask layer to form a plurality of mask patterns arranged in an array in the transfer mask layer, and the transfer mask layer between at least part of the mask patterns forms a transfer pattern; and etching the magnetic composite layer along the transfer pattern to form a plurality of columnar structures arranged in an array, and the columnar structures form magnetic tunnel junctions. Adjacent columnar structures are isolated by gaps. The application facilitates the preparation of a semiconductor structure with high-density magnetic tunnel junctions, and can effectively adjust the size of the magnetic tunnel junctions and reduce the difficulty of preparing the semiconductor structure.

The invention discloses multicolor optical anti-counterfeiting alumite and a production process thereof. The alumite sequentially comprises a magnetic-sensitive enhanced substrate layer, a dynamic separation layer, a temperature-magnetic composite nanofiber multicolor layer, a polyelectrolyte alternate deposition barrier layer and a gradient magnetic-sensitive aluminized layer from bottom to top, wherein the magnetic-sensitive enhanced substrate layer, the dynamic separation layer, the temperature-magnetic composite nanofiber multicolor layer, the polyelectrolyte alternate deposition barrier layer and the gradient magnetic-sensitive aluminized layer are arranged on the alumite; wherein the magnetic-sensitive enhanced substrate layer comprises a graphene modified PET supporting layer and a three-dimensional net-shaped micro-channel embedded with Fe3O4 particles, the dynamic separation layer is temperature-sensitive phase change fluororesin, the temperature-magnetic composite nanofiber colorful layer is electrostatic spinning nanofibers of a core-sheath structure, and the blocking layer is of a polyelectrolyte alternate deposition structure and is embedded with infrared invisible identification particles. According to the invention, four anti-counterfeiting functions of multicolor optical response, magnetic response activation and infrared invisible two-dimensional codes are integrated, the advantages of high multicolor optical contrast, fast response, multiple reuse times, excellent barrier performance, stable transfer printing and the like are achieved, the method is suitable for scenes of high-end tobacco and wine, luxury packaging, high-added-value labels and the like, and the anti-counterfeiting grade and the practicability are obviously improved.

The application belongs to the technical field of soft magnetic composite material preparation, and particularly relates to an insulation coating method for soft magnetic powder material and application. The insulation coating method comprises the following steps: (1) uniformly mixing low-melting-point metal or alloy powder, silica sol, silane coupling agent and hot curing resin glue solution to obtain coating slurry; (2) uniformly mixing soft magnetic powder and the coating slurry of step (1), and then performing hot-pressing curing forming at a temperature of 60-100 DEG C and under vacuum condition, and then performing hot-pressing sintering treatment under a temperature higher than the melting point of the low-melting-point metal or alloy powder and under an oxygen-containing atmosphere condition to obtain the insulation-coated soft magnetic powder material. The insulation coating method of the application combines the advantages of the organic material insulation coating method and the inorganic material insulation coating method, overcomes the respective defects, and significantly improves the stability and insulation coating effect of the insulation coating layer.

This invention discloses a carbon-coated Fe-Co-Ni-B magnetic micron alloy particle, its preparation method, and its application. The method includes the following steps: dissolving iron acetylacetonate, cobalt acetylacetonate, and nickel acetylacetonate in anhydrous ethanol, then adding cyclopentylboric acid and dissolving it to obtain a mixed solution; subjecting the mixed solution to a solvothermal reaction; and after post-treatment to obtain boron-doped pre-decomposition precursor powder. A glucose aqueous solution is then added dropwise to the pre-decomposition precursor powder under stirring and mixed uniformly to ensure uniform adsorption and coating of the glucose solution on the powder surface. The powder is then dried to obtain a glucose-coated composite precursor. The composite precursor is subjected to programmed temperature heat treatment under an inert or weakly reducing atmosphere to obtain carbon-coated Fe-Co-Ni-B magnetic micron alloy particles with a core-shell structure. This invention successfully prepares a magnetic composite material possessing high saturation magnetic properties, good chemical stability, and controllable magnetic properties.

The invention discloses an iron-based soft magnetic composite material and a preparation method thereof, and relates to the technical field of soft magnetic composite materials. The preparation method comprises the following steps: carrying out heat treatment on gas-atomized FeSi powder, and mixing the gas-atomized FeSi powder with FeNi particles to obtain core-shell FeSi-coated FeNi composite powder; then, phosphoric acid and organic matter are adopted for conducting insulation treatment on the core-shell type FeSi-coated FeNi composite powder, and then an insulation FeSi-coated FeNi material is obtained; and finally, mixing the FeSi-coated FeNi soft magnetic powder core with a lubricant, and performing pressing and staged heat treatment to prepare the FeSi-coated FeNi soft magnetic composite material with low magnetic powder core loss and high direct current bias characteristic.

The application discloses a kind of detection flavonoid compound magnetic composite material, preparation, detection method and the application of preparation standard substance, belong to analytical chemistry technical field.Magnetic composite material includes magnetic nanoparticle core, double lanthanide series metal organic framework (MOF) first shell and covalent organic framework (COF) second shell successively coated on its surface, and phenylboronic acid group grafted on the surface of second shell.The material uses the specific covalent binding of phenylboronic acid and the characteristic ortho-diphenol hydroxyl group of flavonoid compound to realize efficient capture and enrichment;Through double lanthanide series MOF shell, promote energy transfer, COF shell provides high specific surface area and ordered diffusion channel, and magnetic core is convenient for rapid separation, which realizes high selectivity identification of flavonoid compound.The material has the advantages of high sensitivity, strong anti-matrix interference ability, rapid and simple detection, etc., and is suitable for accurate analysis of flavonoid compound in complex sample and development of related standard substance.

The application provides a micro soft magnetic composite axial flux motor, and relates to the technical field of motors, and aims at solving the technical problems of large volume and poor heat dissipation effect of the axial flux motor in the prior art. The micro soft magnetic composite axial flux motor comprises a rotating shaft, a stator assembly and two rotor assemblies. The stator assembly comprises a PCB substrate, a plurality of soft magnetic composite cores and a plurality of coils. The PCB substrate is arranged on the rotating shaft. The PCB substrate is provided with a planar connection circuit. The upper and lower end surfaces of the PCB substrate are both provided with a plurality of soft magnetic composite cores at equal intervals in the circumferential direction. Each soft magnetic composite core is provided with an annular closed groove in the circumferential direction. Each groove is wound with a coil. The two ends of each coil are connected to the PCB substrate and electrically connected to the planar connection circuit. The two rotor assemblies are arranged on the rotating shaft and located on the upper and lower sides of the stator assembly. Each rotor assembly comprises a rotor back iron and a plurality of permanent magnets. The plurality of permanent magnets are arranged in the mounting grooves of the rotor back iron at equal intervals in the circumferential direction.

In an aspect of the present invention, a new active optic is provided, namely, a photo-magnetically actuated deformable mirror (PMADM) made of a magnetic composite structure and an optical quality substrate layer. The magnetic layer is composed of Polydimethylsiloxane (PDMS) and powdered ferromagnetic CrO2. A magnet may be used to deform the mirror surface. The powdered CrO2 has a low Curie temperature (preferably around 395 K) which allows changing the magnetization of the magnetic layer using a laser heating source, thus providing control over the deformation. In one embodiment, the structure has an overall dimension of 1.2 inch 1.2 inch 175 μm with an optical pupil diameter of 8 mm. The PMADM is estimated to deform to a maximum stroke of 8.7731 μm before failure with a 3 safety factor.

This invention discloses a magnetic Ni x％ This paper describes the preparation method and application of FeNb2O6 composite catalysts, which fall under the technical field of supported bimetallic oxide catalysts. First, magnetic FeNb2O6 nanocatalysts are prepared via a one-pot hydrothermal method using niobium oxalate hydrate as the niobium source and ferric nitrate as the iron source. Then, magnetic Ni is prepared via a modified deposition precipitation method using nickel nitrate as the nickel source and the magnetic FeNb2O6 nanocatalyst as the support. x％ @FeNb2O6 composite catalyst. The beneficial effect of this invention is that Ni... x％ In the FeNb2O6 composite catalyst, iron, niobium, and nickel species are highly dispersed with no obvious agglomeration, exhibiting high activity and high stability. Furthermore, the catalyst's magnetic properties allow for recovery and reuse, overcoming the shortcomings of traditional metal catalysts such as easy loss and difficulty in recovery after reaction. This Ni... x％ The FeNb2O6 composite catalyst is used for the catalytic hydrogenation conversion of Caragana korshinskii and its related model compounds. Due to its high C-O- bond cleavage activity, it can more effectively promote the depolymerization of Caragana korshinskii organic matter, thereby obtaining bio-oil rich in high-value COH functional groups.

The invention discloses a low-power-consumption planar three-dimensional magnetic sensor based on a graphene microcoil / magnetic composite film and a three-dimensional magnetic field measurement method thereof. The sensor is formed by sequentially laminating a substrate, a bottom-layer soft magnetic composite film, an insulating layer, a graphene microcoil, a passivation layer and a top-layer soft magnetic composite film. The sensor utilizes a planar structure to realize three-dimensional magnetic field detection, on one hand, the sensor is based on an inductive giant magneto-impedance mechanism, and high-precision detection of a magnetic field in a plane (X / Y axis) is realized by utilizing the change of inductive reactance between excitation and induction graphene coils along with the magnetic field; on the other hand, by means of the excellent Hall effect of graphene, magnetic field components in the vertical direction (Z axis) can be sensed at the same time. According to the sensor, real-time decoupling of a three-dimensional magnetic field can be realized by using a planar structure through one-time measurement, and angle and space errors introduced in the conventional three-dimensional sensor assembling process are avoided. In addition, due to the collaborative optimization design of the graphene coil and the soft magnetic thin film, power consumption is reduced, and the resolution ratio is improved.

The application discloses a colorimetric-SERS dual-mode detection and photothermal sterilization method for specifically detecting Vibrio parahaemolyticus and application thereof, and belongs to the technical field of food safety biology. The application takes Vibrio parahaemolyticus as a target, and prepares a multifunctional magnetic composite nanomaterial through layer-by-layer assembly. Firstly, the superparamagnetic separation performance of the magnetic composite nanomaterial is combined with magnetic chromatography to achieve the effect of rapidly separating bacteria from a complex food matrix. Secondly, the colorimetric and SERS sensing signals of the magnetic composite nanomaterial are used to quantitatively detect bacteria in a short time, high precision and high stability in a dual-mode. Finally, the photothermal performance of the magnetic composite nanomaterial is used to kill the detected bacteria by photothermal sterilization, so that the hazard control at the back end of detection is completed.

The application belongs to the technical field of bionic soft robot, and discloses a gas-magnetic composite continuum robot with a snake-like winding function and a preparation method thereof, which comprises a pneumatic execution section, a hollow channel, an eccentric cavity, and a magnetic navigation mechanism. The pneumatic execution section, the hollow channel, and the eccentric cavity are integrally formed. The eccentric cavity is eccentrically arranged and extends along the axial direction of the pneumatic execution section without any discontinuity. The magnetic navigation mechanism is integrated at the end of the pneumatic execution section. The hollow channel extends along the axial direction of the pneumatic execution section without any discontinuity and penetrates the magnetic navigation mechanism. The snake-like gas-magnetic composite continuum robot provided by the application realizes 300° large-angle continuous bending and stable autonomous grabbing of large-size foreign matters with a size of 5 times the diameter of the robot, and solves the defects of the existing magnetic control, such as mismatch of the end stiffness, easy damage to the tissue, mutual cutting of the double driving systems, and easy jamming of the navigation.

The present application belongs to the field of bonded magnetic composite material. The present application provides a kind of flame-retardant magnetic composite material and its preparation method, the preparation method includes the following steps, magnetic powder is dispersed in anhydrous organic alcohol solvent, add the salt containing flame-retardant metal element, add weak base solution, adjust pH to 7~10, stir, use magnetic powder as nucleation site, induce the flame-retardant metal hydroxide in situ growth and coating on its surface, obtain the magnetic powder of coated flame-retardant material;Add coupling agent, obtain the surface modified coated flame-retardant material of magnetic powder;The surface modified coated flame-retardant material of magnetic powder, flame-retardant modified resin and processing aid are mixed uniformly, then extruded granulation, obtain flame-retardant magnetic composite material.The preparation method of the present application, compared with prior art, the amount of flame retardant is significantly reduced, after testing, the prepared flame-retardant magnetic composite material grade reaches UL94-V0, with excellent flame retardancy, magnetic performance and mechanical performance.

The application relates to a soft magnetic composite material and a preparation method of a corrosion-resistant magnetic core thereof, and has the characteristics that the method comprises the following steps: S1, mixing a silane coupling agent, nano-oxide and an organic solvent to prepare a reaction liquid A; adding iron powder into the reaction liquid A, continuously stirring, filtering and vacuum drying the reaction precipitate to obtain coated iron powder; S2, pressing the coated iron powder; S3, pre-sintering the pre-pressed magnetic core; S4, preparing a reaction liquid B; performing electrophoretic sealing on the pre-formed magnetic core by taking the pre-formed magnetic core as an anode and taking the reaction liquid B as an electrolyte; S5, high-pressure forming the magnetic core after the electrophoretic sealing in the step S4 to obtain a high-pressure formed magnetic core; S6, mixing fluoride and isopropyl alcohol to prepare a reaction liquid C, immersing the high-pressure formed magnetic core in the reaction liquid C, and then performing drying and heat treatment. Compared with the prior art, the application has the advantages of low production cost, environmental protection, good corrosion resistance and insulation performance.

The invention relates to the technical field of wastewater treatment, in particular to a magnetic Fe3O4-coated UiO-66 composite material as well as a preparation method and application thereof. According to the specific technical scheme, sodium citrate dehydrate, ferric chloride hexahydrate and urea are dissolved in water at the room temperature, polyacrylamide is added for ultrasonic treatment, UiO-66 is added for continuous ultrasonic treatment, then a reaction is conducted at the high temperature, after the reaction is completed, an obtained product is recovered through magnetic separation, and the recovered sample is washed and dried to obtain the iron-based composite material. And the magnetic Fe3O4 and UiO-66 composite material is obtained. Through research and development of the Fe3O4-coated UiO-66 composite material, an effective scheme integrating the advantages of excellent adsorption capacity and convenient separation is provided for solving the problem of remediation of radioactive uranium pollution in water.

This utility model discloses an anti-expansion magnetic composite bottom aluminum pot. The utility model includes a pot body: the bottom of the pot body has multiple mounting holes, and a fixed inner liner is installed on the bottom of the pot body through these mounting holes. The inner liner is installed on the inner wall of the pot body. A heat-conducting layer is provided at the bottom of the pot body, and a magnetic layer is installed at the bottom of the heat-conducting layer. This utility model has a retaining ring on the outer surface of the magnetic layer, which secures the magnetic layer to the aluminum pot. Multiple connecting posts are provided on the fixed inner liner, allowing the magnetic layer to be secured to the connecting posts. Since there are retaining elements on both the retaining ring and the connecting posts, the magnetic layer is further fixed to the aluminum pot. After long-term heating, the multiple connecting posts restrict the magnetic layer, preventing expansion and avoiding deformation or detachment. A buffer groove is also provided on the magnetic layer to further mitigate its expansion.

The invention relates to a preparation method of soft magnetic composite powder, which comprises the following steps: S1, mixing carbonyl iron powder with a phosphoric acid-acetone solution, stirring and drying at 20-40 DEG C, and cleaning; s2, mixing magnetic powder with a silane coupling agent-acetone solution, and stirring and drying at 20-40 DEG C; s3, mixing the magnetic powder with the amorphous magnetic powder-acetone solution, and stirring and drying at 20-40 DEG C; s4, mixing the magnetic powder with a resin-acetone solution, stirring, drying, granulating, and carrying out vacuum drying; s5, adding the zinc stearate lubricant into the magnetic powder, and uniformly stirring; and S6, pressing the magnetic powder to form a magnetic ring, and curing for 1.5-2.5 hours at the temperature of 160-180 DEG C. The method has the beneficial effects that the direct current bias capability is improved on the premise of ensuring the magnetic conductivity, and the stability of the magnetic conductivity can be ensured under the condition of high frequency.

The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation process of modified silicon dioxide reinforced high-tension butyronitrile gloves. The preparation process of the modified silicon dioxide reinforced high-tension butyronitrile gloves comprises the following steps: S1, adding silicon dioxide, a stabilizer, an accelerant and a defoaming agent into butyronitrile latex, uniformly dispersing, then adding magnetic composite aerogel and sulfur powder, and uniformly stirring to obtain a mixture; s2, a glove mold is soaked in the mixture for dipping treatment, then the glove mold is taken out and dried, leaching treatment, drying vulcanization forming and demolding are carried out, and the modified silicon dioxide reinforced high-tension butyronitrile glove is obtained. The light weight of the glove is guaranteed, and the elongation at break and the tensile strength of the material are remarkably improved.

The invention relates to a magnetic membrane synergetic ultrafiltration system and ultrafiltration method, and the system comprises a magnetic coupling unit and a membrane separation unit; the membrane separation unit comprises a membrane material, and soft magnetic composite particles are embedded in the membrane material; the magnetic coupling unit comprises a first magnetic field device and a second magnetic field device, the first magnetic field device is arranged adjacent to the water inlet end of the membrane separation unit, and the second magnetic field device is arranged adjacent to the backwashing end of the membrane separation unit. The device has the beneficial effects that the membrane material embedded with the soft magnetic composite particles and the magnetic coupling units separately arranged at the water inlet end and the backwashing end have a synergistic effect, so that precise control and efficient cleaning of the membrane pollution process are realized.

The invention discloses a preparation method of a charcoal-loaded cobalt ferrite magnetic composite catalytic material, which is specifically implemented according to the following steps: step 1, selecting green tea as a biomass precursor, and carrying out carrier WT pretreatment; step 2, preparing a magnetic composite catalytic material of biochar loaded cobalt ferrite; step 2.1, preparing a suspension; step 2.2, preparing a solid product; step 2.3, preparing a dried precursor; and step 2.4, preparing the magnetic composite catalytic material of the biochar loaded cobalt ferrite. According to the method, the reaction rate is remarkably increased, the problem of magnetic agglomeration of active components is solved, non-free radical dominance is achieved, the anti-interference performance is high, and efficient magnetic recovery and waste utilization are achieved. The invention further discloses the magnetic composite catalytic material of the biochar loaded cobalt ferrite and application of the magnetic composite catalytic material.

The invention relates to the technical field of preparation of micro-nano adsorption materials, in particular to a magnetic porous microsphere for in-vitro diagnosis and a preparation method of the magnetic porous microsphere. The invention discloses a preparation method of magnetic porous microspheres for in-vitro diagnosis. The preparation method comprises the following steps: S1, preparing polystyrene-based spheres; s2, preparing porous polystyrene microspheres; s3, preparing magnetic composite microspheres; s4, constructing a porous silicon dioxide middle layer; and S5, introduction of a surface functionalized layer: polymerizing a monomer containing a functional group on the surface of the composite microsphere coated with a layer of porous silicon dioxide through a monomer swelling polymerization method, so as to introduce a functionalized polymer layer on the surface of the microsphere and in a porous channel, thereby obtaining the magnetic porous microsphere for in vitro diagnosis. The prepared magnetic porous microspheres are low in settling velocity, good in magnetic separation efficiency, good in monodispersity, uniform in particle size distribution, high in magnetic content, high in surface functional group content and wide in application scene.

This invention discloses a high-frequency, low-loss planar transformer core structure, relating to the field of planar transformer technology. It includes a multi-layered outer shell; a core support component is adjustable on the top of the multi-layered shell; modular core components are mounted and fixed on the core support component; magnetic flux at the air gap edge is eliminated through a composite magnetic circuit of ferrite and soft magnetic composite materials, reducing eddy current losses; and elastically pre-tightened core columns ensure magnetic circuit stability. A three-stage heat dissipation system is employed, consisting of heat pipe equalization, microchannel liquid cooling, and shell radiation, reducing the hot spot temperature difference to within 5°C and achieving a thermal resistance of only 0.05 K / W. Elastic gaps compensate for assembly tolerances and thermal expansion, guide locking enables precise positioning, and shock absorbers attenuate vibration by more than 80%. Integrated temperature, pressure, and strain sensors provide over-temperature protection, dynamic heat dissipation, and stress warning.

The application discloses a kind of high-performance pure organic magnetic composite material and preparation method thereof, the composite material is poly (3-hexyl thiophene) as electron donor, using fullerene as electron acceptor, synthesis poly (3-hexyl thiophene) / fullerene composite charge transfer object.Then after 4" -n-pentyl-4-cyanotriphenyl subsequent doping, poly (3-hexyl thiophene) / fullerene / 4" -n-pentyl-4-cyanotriphenyl composite material.The method and material used in the application enhance the degree of charge transfer between pure organic composite material and solid state structure order, so that composite material obtains high room temperature ferromagnetism and Curie temperature, overcome the shortcoming that organic magnetic material is unstable in performance in air, low Curie temperature.Through poly (3-hexyl thiophene), fullerene and 4" -n-pentyl-4-cyanotriphenyl three composite, provide a kind of simple operation, solid state structure packing order, good stability high magnetic pure organic component composite material preparation new method.