52 results about "Magnetic response" patented technology

The application discloses a kind of magnetically responsive hydrogel optical fiber and its preparation and application, belong to medical biomaterial field.The optical fiber includes from inside to outside: polyethylene glycol diacrylate and acrylamide photocrosslinking light transmission core layer;Calcium alginate low refractive index skin layer;Doped nano-magnetic response layer of ferriferrous oxide;And polydopamine grafting polyvinylpyrrolidone lubricating layer.It is prepared by coaxial extrusion and light / calcium step-by-step crosslinking.The structure realizes the spatial isolation and anti-interference of light transmission and magnetic drive, has low background light loss and anti-bending stability, has biomechanics matching, ultra-low friction and magnetic field accurate active navigation ability, solves the pain point that extremely soft optical fiber is difficult to directional intervention.Suitable for deep tissue precise photothermal therapy, in vivo continuous optical sensing and minimally invasive diagnosis and treatment integration and other frontier medical fields.

This invention relates to the field of microbial-nanomaterial cross-integration technology, specifically to a remediation agent and method for heavy metal contaminated soil based on the targeted regulation of microbial communities. The agent comprises a gene-edited composite microbial community, a nanocatalytic composite system, intelligent regulatory additives, and magnetically responsive materials. The method includes soil electric field pretreatment, agent compounding, magnetoelectric synergistic remediation, dynamic regulation, and maturation monitoring. It synergistically reduces the bioavailable form of heavy metals through photocatalysis, magnetic response, and gene editing technologies, thereby improving remediation efficiency. This invention enhances the tolerance and remediation efficiency of the microbial community through gene editing, nanocatalysis, and magnetoelectric synergistic technologies, shortens the remediation cycle, achieves a significant reduction in the bioavailable form of heavy metals, and simultaneously improves soil ecology. It is suitable for complex contaminated soils, environmentally friendly, and causes no secondary pollution.

This application discloses a data analysis-based method and system for tracing the production quality of steel cylinders. The method includes: applying an alternating magnetic field to the steel cylinder; rotating and scanning the steel cylinder to obtain magnetic response data of the weld area; determining the magnetic flux leakage signal of the steel cylinder and obtaining high-dimensional magnetic fingerprint features from the magnetic flux leakage signal; acquiring high-dimensional magnetic fingerprint features under different operating conditions; determining a structural stability feature subset and a state-sensitive feature subset based on the high-dimensional magnetic fingerprint features under different operating conditions; generating a magnetic fingerprint relationship template by combining the structural stability feature subset; constructing a corresponding healthy baseline manifold based on the magnetic fingerprint relationship template; determining the steel cylinder quality residual vector by combining the state-sensitive feature subset and the healthy baseline manifold; determining the steel cylinder quality degradation type and degree by using the steel cylinder quality residual vector; and generating a production quality traceability report by combining the steel cylinder quality degradation type and degree. This application can effectively improve the accuracy of steel cylinder production quality traceability.

This application relates to the field of environmental functional technology and discloses a magnetic porous chitosan-functionalized biochar and its preparation method. The material is prepared by solid-phase synthesis from a pre-carbonized biochar precursor, chitosan, organic acid iron salt, and sodium bicarbonate. The method includes: ball milling the raw materials to obtain an ultrafine composite powder, placing it in a constant temperature and humidity environment for moisture-induced solid-phase aging to allow the components to assemble at the interface; subsequently, subjecting it to restricted pyrolysis and in-situ magnetization under an inert atmosphere, and finally washing and drying to obtain the target product. This invention employs a solid-phase mechanochemical process combined with moisture aging, avoiding pore blockage caused by liquid-phase impregnation and inhibiting nitrogen loss during pyrolysis through coordination. The obtained product has a well-developed mesoporous structure, high nitrogen doping content, and rapid magnetic response characteristics, exhibiting excellent adsorption capacity, kinetic rate, and cycling stability for heavy metals and antibiotics.

The application discloses a conductive connection structure between an electric core current collecting substrate and a current collecting component and a forming method, and aims to solve the problems of the limitation of large-area welding, the insufficient stability of the bonding structure of conductive glue, the long conductive path and the few conductive paths. The connection structure realizes the directional lamination of the substrate and the enrichment of the conductive filler under the action of an external magnetic field by the magnetic response treatment of the electric core current collecting substrate and the bonding and curing materials containing the magnetic response components, forms the surface contact conductive path and the cooperative conduction of the enriched conductive structure, and realizes the structural reinforcement through the occlusion and interlocking. Therefore, the contact resistance is reduced, the invalid mass is reduced, and the interface connection reliability is improved.

The application discloses a multistage grading screening method for manufacturing battery negative materials, relates to the technical field of lithium ion battery material preparation, and actively applies a high-frequency rotating magnetic field in a grading area, so that eddy current is generated in all through particles, when a magnetic foreign matter wrapped by non-magnetic matter passes, the magnetic core in the magnetic foreign matter generates a unique magnetic response in the changing magnetic field, and the overall conductive characteristic of the magnetic foreign matter is different from normal materials due to the existence of the non-magnetic wrapping layer, signal processing and the controller perform real-time fusion and coupling analysis on the two signals, can distinguish the signal combination with the abnormal resistivity characteristic and the weak magnetic characteristic, the identification mode of the active detection and double-dimensional sensing does not depend on the strong magnetism of the foreign matter appearance, a breakthrough is realized in the detection principle, and reliable target indication is provided for subsequent accurate capture.

This invention discloses a multi-stimulus-responsive upconversion luminescent nanocrystalline magnetic microsphere and its preparation method, belonging to the field of biomedical polymer materials and nanobiotechnology. The microsphere's main body is a porous copolymer matrix, encapsulating a core of magnetite (Fe3O4) magnetic nanocrystals. Rare-earth-doped fluoride upconversion luminescent nanocrystals are coupled to the surface and pores. The copolymer side chains of the microsphere incorporate azide groups, acidic stimulus-responsive groups, and photostimulation-responsive groups, constructing an independent and non-interfering triple orthogonal logic gating system on the surface. The preparation method includes preparing an oil phase containing copolymers, magnetic nanoparticles, and a volatile porogen; pre-emulsifying and homogenizing the oil phase in an acidic aqueous phase using an SPG membrane; inducing phase separation by controlled solvent evaporation to form porous microspheres; and finally coupling the upconversion nanocrystals via a click chemistry reaction. The magnetic microspheres of this invention eliminate background fluorescence interference from complex samples from a physical perspective. Their porous structure endows the microspheres with excellent quasi-levitation properties and magnetic responsiveness, effectively solving problems such as single surface function and signal crosstalk of microspheres. They are suitable for in vitro clinical diagnosis and complex analysis of multiple targets.

The application discloses an electric transport testing device and method for in-situ phase change detection, and mainly relates to the technical field of material in-situ characterization and electric transport measurement. The device comprises a sample stage, a circuit board, a temperature control module and a signal acquisition circuit. The sample stage adopts a T-shaped structure as a whole, screw fixing holes are arranged on the lateral sides of the upper transverse area of the sample stage, and the sample stage is used for mechanical fixation with a sample rod. A plurality of threaded holes are arranged on the left and right sides of the sample stage to adapt to the installation requirements of circuit boards with different lengths. The application has the beneficial effects that the resistivity continuous acquisition and the fixed-point Hall measurement function are integrated in the same testing platform, the R-T curve and the Hall parameter-temperature relationship can be obtained simultaneously in one temperature change process without replacing the sample or re-wiring. Through comprehensive analysis of the resistivity change, the Hall coefficient change and the abnormal Hall magnetic response characteristics, the phase transition temperature, the phase transition type and the electronic structure evolution in the phase transition process of the material can be comprehensively determined from the electric transport angle.

The application belongs to the technical field of enzyme engineering and new material cross, and particularly relates to a kind of immobilized cellulase of magnetic mesoporous core-shell material and preparation method and application. The immobilized cellulase is obtained by physical adsorption of cellulase with magnetic mesoporous core-shell material F5HPU-46 as carrier. F5HPU-46 is a unique core-shell structure with paramagnetic Fe3O4 nanoparticles as core layer and UIO-66 mesoporous shell layer with stable structure, which has the dual advantages of magnetic response and high specific surface area mesoporous structure. The relative enzyme activity of the immobilized cellulase in the application is increased to 119% under acidic conditions at pH 4, while the relative enzyme activity of free enzyme is decreased to 75%.

Provided herein are compositions comprising light-and-magnetoresponsive protein domain, such as engineered light-oxygen-voltage-sensing (LOV) domains, and methods of using the same. The light-and magnetoresponsive proteins domains may be used to form compositions such as fusion proteins comprising heterologous protein components and bioluminescent protein domains with activity that is dependent on the presence of light, e.g., light emitted by a reaction catalyzed by the bioluminescent protein domain, and on the presence of a magnetic field.

The application discloses a kind of magnetic nano-enzyme microspheres and preparation method and application thereof, belong to the cross technical field of material, drug, rapid detection etc..The magnetic nano-enzyme microspheres take Fe3O4 microspheres as core, and platinum nanoparticles are in situ grown after being coated with dendritic mesoporous silica on the surface.The magnetic nano-enzyme microspheres of the application utilize magnetic response separation, high load content and enzyme catalytic amplification, greatly improve the detection sensitivity and signal strength, and are suitable for high-sensitivity detection of trace chloramphenicol and hexachlorobenzene.The qualitative detection cutoff value of chloramphenicol is 0.1 ng / mL, and the quantitative detection sensitivity is 0.0011 ng / mL.The quantitative detection sensitivity of hexachlorobenzene is 0.4 ng / mL.

This application relates to a method for preparing magnetically responsive drug-loaded microspheres based on a high-throughput microfluidic chip in the field of biomedical microsphere preparation technology. The method involves encapsulating carboxylated magnetic nanoparticles via suspension polymerization, then co-forming them with biodegradable polymers and therapeutic drugs to create a magnetically responsive dispersed phase. Through structural design, multiple microsphere generation units are integrated on a single chip, arranged concentrically, to achieve one-step high-throughput generation of monodisperse oil-in-water emulsion droplets. Subsequent processing yields magnetically responsive drug-loaded microspheres with uniform particle size distribution and tunable saturation magnetization. This invention overcomes the problems of easy magnetic core aggregation, poor microsphere particle size uniformity, low throughput of traditional microfluidic preparation, and complex integration of magnetic response and drug-loading functions in existing technologies. It is suitable for various biomedical applications such as targeted chemotherapy, drug sustained release, magnetothermal synergistic therapy, and nucleic acid / protein delivery, and has advantages such as rapid and scalable preparation process, high batch stability, and precise magnetic field control.

This application belongs to the field of electromagnetic detection technology and provides a dynamic correction method for the electromagnetic response of a UAV based on residual magnetic field injection. The method includes: under no flux negative feedback, a receiving coil collects a first induced voltage, and a receiving system receives the first induced voltage to obtain a first measured voltage; a reverse magnetic field is generated through flux negative feedback, and the receiving coil collects a second induced voltage, which is then received by the receiving system to obtain a second measured voltage; the transfer function of the actual receiving system is calculated based on the relationships between the first and second measured voltages and the first and second induced voltages, respectively; the transfer function of the theoretical receiving system is calculated, and correction coefficients and the effective secondary field signal are calculated; the amplitude and phase information of the effective secondary field signal are calculated. By eliminating the residual primary field voltage, dynamic calibration of the receiving system is simultaneously achieved, thereby obtaining more accurate response voltage data from two aspects and improving flight detection accuracy.

The application relates to a multi-modal magnetic imaging device and method based on the fusion of NV color centers and a MEMS atomic gas chamber layer. The device comprises: a composite sensing chip, which is sequentially integrated from bottom to top with an NV color center sensing layer, a spacing coupling layer and a MEMS atomic gas chamber layer; the NV color center sensing layer can detect a near-field magnetic signal to generate an NV fluorescence signal in an excited state; the spacing coupling layer can isolate and couple the near-field magnetic signal to the MEMS atomic gas chamber layer; the MEMS atomic gas chamber layer can detect a coupled magnetic signal to generate a magnetic response light signal in a SERF working state; and a processing system can enable the NV color center sensing layer to be in the excited state, enable the MEMS atomic gas chamber layer to be in the SERF working state, and generate a fusion magnetic image based on the two types of signals. The application can solve the problem that related technologies cannot realize efficient magnetic flux coupling between an NV color center sensing unit and an atomic magnetometer of the SERF at a chip level, and realize high-sensitivity and high-fineness magnetic imaging.

The application discloses a river sewage treatment method and a treatment agent, and belongs to the technical field of sewage treatment. The river sewage treatment agent is obtained by fixing and compounding microbial liquid with modified polyurethane foam as a carrier, wherein the modified polyurethane foam comprises a magnetic hydrophilic polyurethane foaming framework and a polyethylene imine crosslinking layer loaded on the surface of the foaming framework; the compounding microbial liquid is composed of polyphosphorus bacteria fermentation liquor, nitrifying bacteria fermentation liquor, denitrifying bacteria fermentation liquor and Rhodospirillum rubrum fermentation liquor in a certain volume ratio. By adding the treatment agent into a sequencing batch reactor at a certain volume filling rate, the chemical oxygen demand, ammonia nitrogen and total phosphorus in the river sewage can be efficiently removed; meanwhile, the magnetic response performance of the treatment agent can realize rapid recovery and reuse, and further reduces the treatment cost.

The application discloses a dual-frequency excitation magnetostrictive torque sensor air gap compensation device and method. The elastic shaft transmits torque and serves as a magnetic sensitive carrier. The excitation probe assembly applies an alternating excitation magnetic field to the elastic shaft. The detection probe assembly senses a magnetic response and outputs two differential signals. A dual-frequency signal generation module generates low-frequency and high-frequency alternating excitation signals in a measurement cycle. A signal modulation module drives the excitation probe after power amplification of the excitation signals, and outputs the differential detection signals to a data acquisition and compensation module after conditioning and amplification. The data acquisition and compensation module collects the conditioned signals, extracts low-frequency and high-frequency steady-state output amplitudes, and performs online joint calculation of torque and air gap increments based on a calibration sensitivity matrix to output the compensated torque value. The application uses the sensitivity difference of the system to torque and air gap at different frequencies to construct a dual-frequency observation model, realizes joint calculation, and improves the measurement accuracy, stability and robustness under complex conditions.

The application discloses a kind of free radical source molecule modified metal-free high-temperature ferromagnetic carbon materials, preparation method and application, material is obtained by electrochemical modification free radical source molecule on the surface or interlayer of carbon material, free radical source molecule is any one or more in quinone / quinone dimethyl derivative directly reduced by cathode or need pass through two-pole cooperation hydroxyl-naphthoquinone / anthraquinone molecule, carbon material is any one of bulk carbon material or powder carbon material;Preparation method includes: dissolving organic molecule in solvent to obtain molecular solution;Carbon material is fixed on electrode;Electrochemical reaction modification is carried out under constant voltage, and target product is obtained after drying;The application realizes metal-free, high Curie temperature ferromagnetic carbon material, with light weight, flexibility, excellent conductivity, adjustable magnetic characteristics, etc., can be used in electromagnetic shielding, microwave absorption, flexible magnetic response device and structure-electromagnetic integrated composite material and other fields in the future.

This invention discloses a pretreatment method for 3-cyanopyridine wastewater, belonging to the field of wastewater pretreatment technology. This method uses a modified magnetic porous adsorbent as its core and achieves continuous pretreatment of 3-cyanopyridine wastewater through a magnetically controlled adsorption separation device. The adsorbent uses a carboxyl-block polyarylene ether nitrile as a stable porous adsorption framework, introducing nitrile-carboxyl dual-target adsorption sites into the molecular chain. Simultaneously, graphene composite magnetic particles are introduced into the carboxyl-block polyarylene ether nitrile, providing rapid magnetic response separation performance. Through the deep synergy of highly selective adsorption and magnetically controlled separation, effective removal and resource recovery of 3-cyanopyridine are achieved. It can maintain stable treatment performance during long-term continuous operation and is suitable for the industrial pretreatment of 3-cyanopyridine production wastewater.

This invention discloses a magnetically responsive artificial cartilage for passive wireless monitoring and its preparation method, belonging to the field of artificial cartilage technology. The method includes the following steps: S1, dissolving hydrogel material in deionized water to prepare a uniform hydrogel precursor solution; S2, pre-crosslinking a portion of the hydrogel precursor solution to prepare a hydrogel support matrix; S3, mixing magnetic powder into the remaining hydrogel precursor solution to prepare a magnetically responsive composite solution; S4, uniformly spreading the magnetically responsive composite solution on the upper surface of the hydrogel support matrix, and sequentially performing freeze-thaw treatment, heat treatment, and hydration treatment, followed by magnetization treatment to obtain the final product. This invention, through layered construction and specific post-processing techniques, endows the artificial cartilage with excellent mechanical stability, interfacial bonding strength, and sensitive magnetic response signal output capability, possessing both tissue support and intelligent monitoring functions, thus achieving passive wireless monitoring.

This invention relates to the field of shoe sole technology, specifically to a multi-color, multi-density shoe sole. The sole is formed by molding foam beads A, B, and C using a shoe sole mold. Magnetic responsive fibers are dispersed within foam beads B and C. A first foaming agent is dispersed within foam beads B, and color-developing microparticles are dispersed within foam beads C. These color-developing microparticles are composed of a mixture of photochromic material and pigment. Magnetic responsive fibers are distributed within the color-developing microparticles, and a second foaming agent is distributed within the magnetic responsive fibers. Through a combination of physical and chemical foaming, under the influence of an external magnetic field, different areas of the shoe sole exhibit regular density changes, allowing the sole to better conform to the foot and improve wearing comfort. Furthermore, based on the penetration of magnetic responsive fibers into adjacent foam beads, combined with the three-stage foaming process, the bonding strength between adjacent foam beads is improved, effectively solving the technical problems of existing bead-foamed shoe soles being prone to tearing along the weld interface and having low tear resistance.

This invention provides a magnetically and thermally controlled dynamically powered nanomotor neural graft and its preparation method. The neural graft consists of a biodegradable polymer fiber conduit, an internally filled thermosensitive hydrogel, and a nanomotor loaded on the hydrogel. The surface of the nanomotor is loaded with energy molecules such as succinic acid. The nanomotor is prepared using a highly magnetically responsive material and achieves directional guidance under an applied magnetic field. Heat generated under an alternating magnetic field triggers a gel-sol transition in the thermosensitive hydrogel. Energy molecules are continuously released to increase local ATP levels, maintain cellular homeostasis, and support axonal regeneration and synaptic remodeling. This invention combines the advantages of magnetically driven directional navigation and thermosensitive controlled release, overcoming the shortcomings of traditional methods such as insufficient directionality and energy depletion. The graft exhibits good biocompatibility and is biodegradable, can regulate the immune microenvironment of damaged nerves, avoid oxidative stress, and efficiently promote the regeneration and functional recovery of long-segment damaged peripheral nerves.

This invention relates to a liquid metal composite magnetic hydrogel with magnetic and thermal self-healing properties, its preparation method, and its applications. It addresses the problems of poor flexibility, weak electrical and thermal conductivity, and insufficient environmental tolerance in existing hydrogels. The method of this invention comprises the following steps: 1) preparing a liquid metal dispersion; 2) preparing a magnetic precursor system; 3) preparing a carrageenan solution; 4) magnetic field-induced orientation and thermal cross-linking curing; and 5) low-temperature induced formation of a double network. The gel material prepared by this invention exhibits thermal self-healing properties, achieving flame retardancy and self-healing even in extreme environments such as high temperatures and combustion, thereby ensuring the structural integrity and continuous stable function of the material. Simultaneously, by introducing liquid metal, the electrical and thermal conductivity of the gel system is improved, and by introducing magnetic components, it acquires magnetic control capabilities, enabling continuous use in extreme environments.

The application discloses a human body kinetic energy collection device based on nonlinear magnetic response and belongs to the technical field of energy collection and wearable devices. The human body kinetic energy collection device comprises an upper stator disc, a lower stator disc, a rotor magnet disc, an eccentric mass block and a nonlinear modulation magnet. The upper stator disc, the rotor magnet disc and the lower stator disc are coaxially stacked to form a containing cavity for the rotation of the rotor. The eccentric mass block is fixed to the outer edge of the rotor magnet disc and provides an eccentric driving torque by using the gravity component when the human body arm swings. The nonlinear modulation magnet is fixed to the gap of the trapezoidal coil on the stator disc, and the periodic interference between the alternating magnetic poles of the rotor magnet disc and the rotor magnet disc is generated when the rotor rotates, thereby constructing a single-dual stable nonlinear potential energy field. The nonlinear electromagnetic micro energy capture device is used for efficiently collecting the low-frequency and random arm swing kinetic energy of the human body, and the limitation of the narrow resonant frequency band and high starting threshold of the conventional single stable linear system is broken through.

The application discloses a preparation method of magnetic response polyionic liquid composite nanoparticles, and comprises the following steps: step S1, preparing magnetic ferroferric oxide nanoparticles by using a hydrothermal method; step S2, obtaining composite particles of ferroferric oxide and chitosan by using a cross-linking method; and step S3, under the protection of nitrogen, mixing an ionic liquid monomer, an initiator and deionized water, then adding the composite particles of ferroferric oxide and chitosan, and obtaining magnetic response polyionic liquid composite nanoparticles with a three-layer core-shell structure through hydrogen bonding and electrostatic interaction. The physical coating method is adopted to graft the polyionic liquid on the surface of the composite particles of ferroferric oxide and chitosan through hydrogen bonding and electrostatic interaction, and the obtained demulsifier has the three-layer core-shell structure of the magnetic response polyionic liquid composite nanoparticles, can realize efficient separation of emulsified oil wastewater at room temperature, and has excellent salt resistance and recycling performance.

This invention discloses a magnetic photothermal composite film based on a porphyrin-based covalent organic framework, its preparation method, and its application. The composite film uses three-dimensional porous nickel foam as a magnetic substrate. Active sites are introduced through surface amination, followed by in-situ condensation of 5,10,15,20-tetra(4-aminophenyl)porphyrin and 1,4-phenylenedialdehyde at room temperature, growing a porphyrin-based covalent organic framework layer on the surface and pore walls of the nickel foam framework. This layer simultaneously provides photothermal conversion function and a micro / nano roughened structure. The film is then impregnated with a hexane solution of polydimethylsiloxane and cured to form a hydrophobic sealing layer. The resulting composite film has a water contact angle of 152.9° and exhibits superhydrophobic self-cleaning properties. Utilizing the ferromagnetic properties of the nickel foam substrate, the composite film exhibits magnetic responsiveness and can move directionally under the guidance of an external magnetic field. Under one solar irradiation, the surface temperature rises to above 72.6°C within 120 seconds, and the temperature rise curves essentially overlap after five light-cooling cycles. Based on its photothermal conversion capability, the membrane can adsorb high-viscosity crude oil within 110 seconds and de-ice within 90 seconds under standard simulated sunlight irradiation. The preparation process of this invention is mild and can be used for solar-driven removal and photothermal de-icing of high-viscosity oils.

This invention discloses a method for preparing and applying magnetically responsive gel microspheres for rapid drug release controlled by magnetothermal stimulation, belonging to the fields of biomedical materials and tumor treatment technology. The method includes: preparing magnetic beads conjugated with targeting antibodies and antitumor drugs; dispersing the magnetic beads and an immune environment modulator in a thermosensitive gel precursor solution containing poloxamer 407; and preparing gel microspheres with uniform particle size using microfluidic technology. The microspheres obtained by this invention possess magnetically induced targeting and thermosensitive properties. Under the action of an external alternating magnetic field, they can rapidly generate a magnetothermal effect, triggering the thermal melting and liquefaction of the gel microspheres at the tumor site, achieving on-demand, rapid, and controllable drug release, and simultaneously exerting a synergistic effect of magnetothermal killing and chemotherapy killing, suitable for the treatment of HER2-positive tumors.