58 results about "Ferriferrous Oxide" patented technology

The application discloses a magnesium-based composite material and a preparation method and application thereof. The magnesium-based composite material comprises ferroferric oxide and a magnesium alloy. The magnesium alloy comprises the following components in percentage by weight: 3wt.%-6wt.% of Zn, 0.3wt.%-0.8wt.% of Ca, and the rest of Mg and inevitable impurities. The magnesium-based composite material can effectively solve the problem that micron-sized particles are easy to agglomerate in a metal liquid when the magnesium alloy is modified, and the plasticity of the alloy is reduced and the alloy is not easy to be formed.

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 provides a method for recycling positive electrode materials in batteries, comprising the following steps: separating the positive electrode sheet to obtain a positive electrode current collector and positive electrode active layer powder, wherein the positive electrode active layer powder includes lithium iron phosphate and lithium lanthanum zirconium oxide electrolyte; performing lithium-ion leaching treatment on the positive electrode active layer powder using citric acid to obtain a lithium-containing solution and positive electrode active layer residue; performing iron-phosphorus leaching treatment on the positive electrode active layer residue using sulfuric acid to obtain an iron-phosphorus mixed solution and lanthanum zirconate residue; subjecting the iron-phosphorus mixed solution to a hydrothermal reaction to obtain iron(III) oxide; and performing alkaline dissolution treatment on the lanthanum zirconate residue with sodium hydroxide to obtain NaLaO2 and Na2ZrO3. The recycling method of this invention can efficiently recover lithium, iron, phosphorus, zirconium, and lanthanum elements from the positive electrode material in batteries, and has the characteristics of low cost and environmental friendliness.

This invention relates to an electromagnetic shielding polyester powder coating containing carbon-iron composite conductive filler and its preparation method, belonging to the field of electromagnetic shielding composite material technology. The method includes the following steps: S1, dispersing purified iron(III) oxide nanoparticles ultrasonically in a mixed solvent of ethanol, deionized water, and ammonia to obtain an iron(III) oxide / silica composite material; S2, dissolving carboxylated multi-walled carbon nanotubes in a silane coupling agent, rinsing and drying to obtain a modified carbon-iron composite material; S3, mixing polyester resin, the modified carbon-iron composite material obtained in S2, precipitated barium sulfate, curing agent, leveling agent, benzoin, and carbon black raw materials according to a specified ratio, and finally completing the curing process. This electromagnetic shielding polyester powder coating containing carbon-iron composite conductive filler, by introducing the modified carbon-iron composite conductive filler, achieves an electromagnetic shielding effectiveness of over 30 dB in the X-band, effectively blocking electromagnetic radiation and meeting the shielding requirements of electronic equipment and communication systems.

This disclosure relates to a method for improving the colonization efficiency of rhizosphere growth-promoting bacteria using nanomaterials and a magnetic interaction system. The method includes: S1, mixing modified iron oxide nanoparticles with a suspension of rhizosphere growth-promoting bacteria and then conducting a first culture to obtain modified rhizosphere growth-promoting bacteria; S2, applying a dispersion of magnetic iron oxide nanoparticles to the roots of a plant for a second culture to obtain modified plants; S3, applying the suspension of the modified rhizosphere growth-promoting bacteria to the roots of the modified plants for a third culture; wherein the modified iron oxide nanoparticles are cationic polymer-modified iron oxide nanoparticles. This method constructs a plant-microorganism magnetic interaction system, improving the colonization ability of rhizosphere growth-promoting bacteria in plant roots, and also enhancing the nitrogen-fixing ability of the rhizosphere growth-promoting bacteria, effectively promoting plant growth.

A single-cell transcriptome-guided multimodal synergistic injectable magnetically responsive biomimetic hydrogel system, its preparation method, and its application are described. This hydrogel platform is a three-level composite system of "matrix-microsphere-nanoparticle": the primary structure is a photocrosslinked methacryloyl hyaluronic acid three-dimensional network matrix; the secondary structure is GelMA microspheres loaded with MTPT nanoparticles prepared by microfluidic control; and the tertiary structure consists of bevacizumab and magnetite nanoparticles dispersed in the HAMA matrix. The MTPT nanoparticles have a mesoporous silica core, which is sequentially coated with temozolomide, a polydopamine coating, and a T7 targeting peptide. Under the activation of an alternating magnetic field, Fe3O4 generates a magnetothermal effect, which not only achieves local hyperthermia but also accelerates the time-sequential release of bevacizumab and MTPT, synergistically exerting the effects of chemotherapy, anti-angiogenic therapy, and hyperthermia.

This application relates to the field of electromagnetic wave absorbing materials technology, and discloses a composite aerogel that combines thermal conductivity and tunable effective electromagnetic wave absorption band, its preparation method, and its applications. The composite aerogel consists of composite nanosheets, magnetic nanorods, and a binder; the composite nanosheets form a continuously oriented layered structure through the binder, and the magnetic nanorods are loaded onto the composite nanosheets; the composite nanosheets are composed of Ti3C2T... x The composite aerogel is composed of MXene nanosheets and reduced graphene oxide through hydrogen bonding; the magnetic nanorods are iron oxide nanorods; and the binder is a one-dimensional fiber. The unique layered oriented arrangement of this composite aerogel improves the impedance matching at the aerogel / air interface, reduces electromagnetic wave surface reflection, and allows electromagnetic waves entering the aerogel to be gradually converted into heat energy through multiple reflections and absorption processes. Furthermore, its layered oriented arrangement facilitates directional heat conduction. Through the synergistic effect of its structure and materials, it possesses both electromagnetic wave absorption and high thermal conductivity.

The application discloses a kind of magGO@PDA@PVP composite adsorbing material and its preparation method and application, and the composite adsorbing material includes graphene oxide, ferroferric oxide, polydopamine and polyvinylpyrrolidone, in the preparation process, ferroferric oxide and graphene oxide first form composite material, then polydopamine is wrapped in the surface of composite material, finally polyvinylpyrrolidone is grafted on the surface of polydopamine.The application uses the above structure of a kind of magGO@PDA@PVP composite adsorbing material and its preparation method and application, and the prepared magGO@PDA@PVP composite adsorbing material separates polyphenol effective component in traditional Chinese medicinal materials using matrix solid phase dispersion method, solvent usage is less, environmental protection;Compared with traditional ultrasonic extraction method, the polyphenol content extracted is larger, is conducive to subsequent utilization, and simultaneously, the polyphenol extracted can produce good antioxidant property at lower concentration.

This invention discloses a method for preparing cationic and amphiphilic quaternized composite magnetic nanoparticles, comprising the following steps: Step S1, preparing magnetic iron oxide nanoparticles using a hydrothermal method; Step S2, preparing silica-coated magnetic iron oxide nanoparticles using the Stober method; Step S3, preparing cationic and amphiphilic quaternized composite magnetic nanoparticles using an electrostatic self-assembly method. This invention uses low-cost alkane quaternary ammonium salts as functional monomers to achieve a three-layer core-shell structure comprising an iron oxide magnetic core, a silica intermediate bridging layer, and an alkane quaternary ammonium salt functional outer layer. The alkane quaternary ammonium salt is stably loaded onto the silica surface through a non-covalent grafting mechanism of electrostatic self-assembly, thereby achieving mild and efficient grafting. The resulting composite magnetic nanoparticles can achieve efficient separation of emulsified oily wastewater at room temperature and exhibit excellent recyclability, salt tolerance, and wide pH adaptability.

This invention relates to the field of thermal management technology, specifically to a magnetic functional thin film and a thermal interface material. The magnetic functional thin film comprises an acrylate polymer matrix and iron oxide-coated carbon fibers dispersed in the acrylate polymer matrix; the iron oxide-coated carbon fibers are oriented along the thickness direction of the magnetic functional thin film. This invention achieves efficient oriented alignment of carbon fibers under low magnetic field strength through a strategy of "magnetic coating + low magnetic field induction + ultrasonic vibration synergy," significantly improving the vertical thermal conductivity of the film while endowing it with excellent flexibility and mechanical strength. It can be widely used in fields such as chip heat dissipation, flexible electronics, and 5G communication equipment.

The present application belongs to the field of clean combustion of coal and collaborative disposal of industrial solid waste, and discloses a coal and red mud collaborative denitration and desulfurization clean combustion method and a boiler system, aiming to solve the technical problems of high cost of denitration and desulfurization of traditional coal-fired boiler and difficulty in utilization of red mud. Through a double-furnace series structure and a staged air distribution system, a partitioned atmosphere is constructed in the furnace, realizing in-situ integration of denitration in the reduction zone and desulfurization in the oxidation zone. The strength of the reduction atmosphere is enhanced by relying on atomized water to strengthen the water gas reaction, and the material residence time and the catalyst life are prolonged by cooperating with the countercurrent contact of the porous particles of red mud and the two-stage circulation. Meanwhile, the iron oxides in the red mud are in-situ reduced and magnetized in the furnace, and a high-purity ferroferric oxide product is obtained through crushing and magnetic separation at the furnace bottom. The present application realizes multiple goals of in-situ low-cost clean combustion of coal, large-scale consumption of red mud and high-value resource utilization, and brings environmental and economic benefits.

The application discloses a kind of bifunctional magnetic nano material and its preparation method and application.The nano material described in the application is Fe3O4@ZrO2@TiO2@mSiO2-L-Cys, with spherical structure;The material includes successively from inside to outside: the inner core is the magnetic nanoparticle of ferriferrous oxide;Intermediate layer is zirconium dioxide and titanium dioxide composite metal oxide layer;Sub-outer layer is mesoporous silica layer;The outermost layer is the L-cysteine molecular layer grafted by zirconium-sulfur chemical bond;The preparation method described in the application adopts solvothermal method to synthesize magnetic core, functional layer is coated by hydrothermal reaction, co-condensation method constructs mesoporous shell, and hydrophilic group is introduced by chemical grafting.The bifunctional magnetic mesoporous nano material prepared in the application is applied to the effective enrichment of glycopeptide and phosphopeptide in standard protease solution mixture, and the detection sensitivity of phosphopeptide and glycopeptide reaches 1 fmol / μL, which has wide prospect in glycopeptide and phosphopeptide proteomics analysis research.

This invention provides an application of iron(III) oxide quantum dots in the analysis of Cr(VI) / Cr(III) speciation and the photocatalytic reduction of Cr(VI) to Cr(III), belonging to the field of heavy metal detection technology. This invention synthesizes iron(III) oxide quantum dots using iron(III) oxide nanoparticles. The fluorescence intensity of these iron(III) oxide quantum dots is enhanced in the presence of o-phenylenediamine, and further enhanced in the presence of Cr(VI), without interference from other metal ions. Therefore, the fluorescent probe composed of iron(III) oxide quantum dots and o-phenylenediamine can be used to detect the Cr(VI) content in samples and analyze the speciation of Cr(VI) / Cr(III), with a Cr(VI) detection limit of 2.44 μg / L. Simultaneously, these iron(III) oxide quantum dots possess nanozyme activity, capable of catalytically reducing Cr(VI) to Cr(III) under visible light conditions, with over 99% of Cr(VI) being degraded within 2 hours.

The utility model relates to the field of machining discloses an auxiliary supporting device, including device body, device body upper end one side is equipped with mounting hole, the inside sliding of device body is provided with the axle body, device body one side is provided with first locking mechanism and second locking mechanism, device body inside lower extreme is provided with spring. In the utility model, device body adopts S45C material, high strength, good tenacity can stably bear the workpiece pressure of axle body transmission, the axle body selects SK95 material and is treated through quenching and tempering, high hardness and not easy to bend, ensure the structure precision of workpiece contact, the both surface of four oxidation three iron membrane can isolate corrosive medium, reduce friction wear, prolong the life, the sliding stroke of axle body 6mm can be flexible adaptation different size workpiece, 0.6kN 9kN's supporting force and 0 11N's jacking force, can effectively balance workpiece stress, prevent vibrating, deformation when processing, guarantee processing accuracy.

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 a drug-loaded microalgae motor system for colon-targeted delivery and a preparation method and application thereof. The drug-loaded microalgae motor system comprises a Chlamydomonas reinhardtii microalgae motor core, the surface of the core is adsorbed with amino-modified ferroferric oxide nanoparticles through electrostatic adsorption, is wrapped with quercetin-modified chitosan quaternary ammonium salt, forms a nano-composite with magnetic responsiveness, and is encapsulated in a sodium alginate microsphere. The application utilizes Chlamydomonas reinhardtii as an antioxidant for adjuvant therapy, in a colon environment, the sodium alginate microsphere can be degraded in response to specific conditions, release the microalgae motor to autonomously move in intestinal fluid, and under the guidance of an external magnetic field, precisely target a lesion site in the intestinal tract. The application has good biocompatibility, biodegradability, gastric acid avoidance ability and magnetic / chemical dual driving targeting function, can effectively improve the treatment effect on colon diseases, and significantly reduce the systemic side effects of drugs, and expands the application of micro / nano motors in the biomedical field.

This invention relates to the field of composite material technology, specifically to a chitosan-ferric oxide-rare earth cerium composite material, its preparation method, and its applications. The chitosan-ferric oxide-rare earth cerium composite material of this invention consists of a chitosan matrix framework, a magnetic component of ferric oxide, and a cerium-containing structural modification component, distributed in an irregular block shape with cerium-containing particles distributed on the surface. Ferric oxide is generated in situ and dispersed within the chitosan matrix framework, while the cerium-containing structural modification component mainly binds to the hydroxyl, amino, and amide groups on the chitosan molecular chain through coordination. The chitosan-ferric oxide-rare earth cerium composite material of this invention exhibits excellent heavy metal ion adsorption and magnetic separation performance. It not only overcomes the shortcomings of existing technologies, such as difficulty in adsorbent separation and recovery, easy dissolution and weight loss under acidic conditions, and poor treatment effect of heavy metal wastewater, but also solves the problems of limited adsorption capacity, insufficient mechanical strength, and difficulty in reusing single chitosan materials.

The application discloses a kind of magnetic material for synchronously enriching glycopeptide and phosphopeptide and its preparation method and application.The nanomaterial Fe3O4@nSiO2@TiO2@mSiO2-L-Cys described in the application;The material includes successively from inside to outside: the magnetic core of ferriferrous oxide;Non mesoporous silica intermediate layer coated on the surface of the core;Titanium dioxide functional layer coated on the surface of the intermediate layer;And the outermost layer is the ordered radial dendritic mesoporous silica shell layer modified by L-cysteine;The preparation method described in the application adopts solvothermal method to synthesize magnetic core, functional layer is coated by hydrothermal reaction, co-condensation method is used to build mesoporous shell layer, and hydrophilic group is introduced by chemical grafting.The prepared magnetic material of the application is applied to the effective enrichment of glycopeptide and phosphopeptide in standard protease hydrolysis mixed liquor, and the detection sensitivity of phosphopeptide and glycopeptide reaches 0.1fmol / µL and 1fmol / µL respectively, which has wide prospect in glycopeptide and phosphopeptide proteomics analysis research.

The application belongs to the technical field of preparation of magnetic recyclable gel adsorbent, and particularly relates to a high-efficiency phosphorus removal agent and a preparation method thereof. The method comprises the following steps: firstly, dispersing ferroferric oxide nanoparticles in a water solution containing sodium dodecyl sulfate to obtain a magnetic nanofluid; simultaneously, dispersing lanthanum-zirconium heteronuclear metal oxygen cluster organosilane functional derivative, zinc-aluminum layered double hydroxide, acrylamide and a crosslinking agent in water to form a suspension; under nitrogen protection, adding the magnetic nanofluid into the suspension, adding an initiator after adjusting the pH value, and reacting in a warm environment to generate a composite gel. Then, the solid product is obtained through magnetic separation, and after washing and long-time freeze-drying, the high-efficiency phosphorus removal agent is obtained. The phosphorus removal agent combines the adsorption and precipitation of various active components, has magnetism and is easy to recycle, and is suitable for efficient removal of phosphate in water.

The application relates to the technical field of magnetic particle imaging, and more particularly to an iron oxide nanoparticle and application of the iron oxide nanoparticle in magnetic particle imaging. The nanoparticle is an octahedral superparamagnetic ferroferric oxide nanoparticle, the nanoparticle is synthesized by adding a surfactant and controlling a reaction rate through a high-temperature thermal decomposition method, the surfactant includes oleic acid and oleylamine, the octahedral superparamagnetic ferroferric oxide nanoparticle is coated with an amphiphilic polymer, the amphiphilic polymer includes polymaleic anhydride-1-octadecenoic acid and polystyrene maleic anhydride copolymer, and the outer layer of the amphiphilic polymer includes biological membranes such as macrophage membranes, red blood cell membranes, neutrophil membranes and tumor cell membranes according to biological application requirements. The surface of the octahedral magnetic particle is a crystal face, the crystal face has low spin disorder and low anisotropy, so that the octahedral magnetic particle has the advantages of low coercivity and high initial magnetic susceptibility, and thus becomes a high-sensitivity magnetic particle imaging tracer.

The application discloses a preparation method of a Raman silent zone magnetic SERS substrate, and belongs to the technical field of surface enhanced Raman spectroscopy. The preparation method of the Raman silent zone magnetic SERS substrate comprises the following steps: firstly, a layer of gold nanoshell is wrapped on the surface of a ferroferric oxide particle to obtain Fe3O4@Au nanoparticles; then, a Raman beacon molecule 4-mercaptobenzonitrile is modified on the surface of the Fe3O4@Au; and further, a layer of silver nanoshell is wrapped on the surface of the Fe3O4@Au@4-mercaptobenzonitrile to obtain the Raman silent zone magnetic SERS substrate Fe3O4@Au@4-mercaptobenzonitrile@Ag. The Fe3O4@Au@4-mercaptobenzonitrile@Ag prepared by the method has uniform size and morphology, has a strong spectral peak at a Raman silent zone 2226 cm ‑1 ; and in combination with the local surface plasmon resonance property of the core-shell structure, the sensitivity of SERS detection can be effectively enhanced, and the Raman silent zone magnetic SERS substrate has a good practical application prospect in the field of rapid detection of food and the like.

This invention discloses a method for preparing a wall-mounted magnetic nanoparticle-immobilized enzyme microreactor. The method first involves encapsulating Fe3O4 nanoparticles with polydopamine. Utilizing the self-polymerization properties of dopamine, a uniform polydopamine coating layer rich in active groups is formed on the surface of the Fe3O4 nanoparticles. This provides a high-density reaction site for subsequent activation with a silanizing agent (3-aminopropyltriethoxysilane, APTES) and cross-linking with glutaraldehyde (GA). Subsequently, through multi-level surface functionalization modification involving 3-aminopropyltriethoxysilane activation and glutaraldehyde cross-linking, efficient and stable immobilization of CALB is achieved, while simultaneously endowing the immobilized enzyme with excellent magnetic separation performance, thermal stability, and storage stability. This invention features a simple process, easy operation, and easy recovery.

The application discloses a kind of metal ion doped magnetic medium cooperative core-shell structure wave-absorbing material and its preparation method and application.The core layer of the wave-absorbing material described in the application is iron-based material, and the shell layer is a manganese dioxide layer doped with metal ions coated on the surface of the core layer.By using a hydrothermal method to prepare magnetite nanoparticles with uniform size, and using potassium permanganate, manganese sulfate monohydrate and metal salt as reaction raw materials, the application continues to use a hydrothermal method to grow manganese dioxide doped with metal ions on the surface of the magnetite, forming a wave-absorbing material with a core-shell structure.The wave-absorbing material prepared by the application has multiple loss mechanisms such as dielectric loss, magnetic loss, internal reflection and scattering loss, has excellent wave-absorbing performance, and has a wide absorption frequency band, good impedance matching, a simple preparation method, and is suitable for continuous industrial production.

The utility model relates to wastewater treatment device technical field, concretely is a kind of wastewater innocuous degradation device, including mixing pool and biological membrane processing bin, mixing pool top is provided with magnetic powder feed bin and flocculating agent feed bin, motor is fixedly installed at mixing pool top, the output shaft of motor is connected with stirring paddle, the bottom of mixing pool is V-shaped, electromagnet is equipped at the outer side of two inclined surfaces of the bottom of mixing pool, one drain pipe is connected to the bottom of mixing pool side surface, the low point of V-shaped bottom is inclined to one drain pipe, biological membrane processing bin is connected by communicating tube with mixing pool, biological membrane processing bin is equipped with biological filler, the utility model discloses by adding ferroferric oxide powder and flocculating agent to wastewater simultaneously, the magnetic floc of greater density is formed after sufficient mixing, the magnetic field effect of electromagnet and magnetic conducting net is generated, so that magnetic floc is gathered to pool bottom, accelerates precipitation speed, improves solid-liquid separation efficiency.

The application discloses a kind of carbon-coated ferroferric oxide supercapacitor negative materials and preparation method thereof, the method is first with iron nitrate, citric acid and sodium sulfate as raw material, by sol-gel method preparation mixed sodium sulfate gel precursor, then by pyrolysis makes Fe3O4 Surface form uniform carbon layer, and then combine nitric acid-ethanol solution ball milling process, significantly increase the active site on the surface of material, effectively promote electrolyte ion migration and surface faradaic reaction, so as to fully exert the pseudo-capacitance characteristics of Fe3O4, greatly improve the specific capacitance of material;The application provides a kind of preparation method of carbon-coated ferroferric oxide supercapacitor negative material, which is simple in process, low in cost and excellent in performance, provides a new idea for the design and controllable preparation of high-performance supercapacitor negative material.

The application discloses a heat-conducting silica gel modification method for heat dissipation of smart power grid transformer equipment, and belongs to the technical field of transformer equipment thermal management. In view of the problems of disordered distribution of the existing heat-conducting silica gel filler, high interface thermal resistance and no cooperation with the electromagnetic field of the transformer equipment, the application is modified by compounding magnetic ferroferric oxide modified hexagonal boron nitride and gradient particle size spherical alumina, and modifying a double-end vinyl polysiloxane macromolecular coupling agent, and is oriented and solidified in situ in a power frequency alternating electromagnetic field to form a directional heat-conducting channel. The heat-conducting coefficient of the application reaches 9.8 W / (m*K), the volume resistivity is 8.5*10 14 Ω*cm, the temperature drop of a wiring terminal of the transformer equipment is 33 DEG C, and the heat-conducting and insulating performance is improved in cooperation.

The application provides a functional coating material, a battery functional diaphragm and a preparation method and application thereof. The main component of the functional coating material is a functionalized multi-walled carbon nanotube (MWCNT) wrapped porous hollow ferroferric oxide nanosphere (MWCNT / H-Fe3O4) composite, and the MWCNT / H-Fe3O4 composite is prepared by using a one-step self-assembly process. The battery functional diaphragm is mainly composed of the functional coating material and a polyolefin diaphragm. The functional coating has excellent electrolyte wettability, lithium ion selective permeability, polysulfide anion barrier property and chemical catalytic conversion characteristics. The lithium-sulfur battery using the functional diaphragm has excellent rate performance and cycle stability.

This invention discloses a method for detecting the structure of iron powder combustion products, belonging to the field of detection methods. This method measures elemental iron (Fe). 0 The content of ferrous iron (Fe) was determined. 2+ The content of ferric iron (TFe) was determined; the content of total iron (TFe) was calculated; and the content of ferric iron (Fe) was calculated. 3+ The content of oxide components was calculated, including ferrous oxide, ferric oxide, and magnetite. The radii of elemental iron, ferrous oxide, ferric oxide, and magnetite were also calculated. Reliable physical and chemical analysis units were used to obtain measurement data, and then mathematical calculations were performed to obtain accurate and reliable information on the composition and structure of iron powder oxidation products, providing a solid theoretical basis for the application of iron powder as a metal particle fuel.

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.