744results about How to "Magnetic" patented technology

According to the present invention, provided is a magnetic recording medium 11 comprising: a non-magnetism base member 1; a lower soft magnetic underlying layer 2 formed on the non-magnetism base member 1; a non-magnetic layer 4 formed on the lower soft magnetic underlying layer 2; an upper soft magnetic underlying layer 6 formed on the non-magnetic layer 4; and a recording layer 9 having a perpendicular magnetic anisotropy, the recording layer 9 being formed on the upper soft magnetic underlying layer 6, wherein crystalline magnetic layers 3 and 5 are formed between the lower soft magnetic underlying layer 2 and the non-magnetic layer 4 or between this non-magnetic layer 4 and the upper soft magnetic underlying layer 6.

The invention discloses a method for removing heavy metal and organic matter composite pollutants in a water body by means of zero-valent iron and persulfate. According to the method, bentonite-supported nanoscale zero-valent iron and persulfate are added to the water body containing heavy metal and organic matters, a multi-phase coexistent system is formed, and the heavy metal and the organic matters are removed. Cr(VI) and phenol contained in the water body can be removed simultaneously with the bentonite-supported nanoscale zero-valent iron and potassium persulfate combined method, the heavy metal Cr(VI) is removed through the strong reduction performance of the nanosacle zero-valent iron, Fe2+ generated by the nanoscale zero-valent iron in the reaction process is fully used to activate potassium persulfate, so that SO4<->* is continuously generated to oxidize and degrade phenol, and the heavy metal and organic matter composite pollutants in the water body are removed synergistically.

The present invention relates to a kind of composite hydroxyapatite/carbon nanotube material and its preparation process. The composite material consists of mainly two components including hydroxyapatite and carbon nanotube. The technological process includes chemical preciptiation to synthesize hydroxyapatite, and compounding directly with carbon nanotube to prepare compoiste hydroxapatite/carbon nanotube material. The composite material possesses excellent mechanical performance and biocompatibility and certain magnetism and wave absorbing performance, so that the composite material may be used in repairing and replacement of body bone and extracorporeal physical treatment of bone diseases, and may have latent application as body's bearing bone, magnetic and wave-absorbing material.

The invention relates to a preparation method of a graphene-loaded nano nickel phosphate hydrogenation catalyst. According to the method, graphene oxide capable of being stably dispersed in water is used as a carrier precursor and loaded nano nickel phosphate is prepared by a static hydrothermal synthesis method. The graphene oxide can be uniformly and stably dispersed into a water solution due to a unique two-dimensional structure and abundant oxyl radicals of the graphene oxide; and furthermore, the graphene oxide has a strong adsorption capability on metal cations, and a nickel source can be highly dispersed. The catalyst provided by the invention is used for hydrogenation of olefin and has relatively high catalytic activity and good reusability. According to the catalyst, preparation conditions are moderate, the process is simple and the cost is low; and industrial production is easy to realize.

The invention relates to a magnetic thermometer nm particle with biocompatibility, which has biocompatibility, and double response properties of magnetism and thermometer property, and the particle diameter thereof is 20 to 60 nm, and the magnetic responsibility is strong, and magnetic saturation intensity is 10.0 to 27.0 emu/g. The synthetic method of the magnetic thermometer nm particle with biocompatibility comprises: firstly, adopting chemical coprecipitation method to prepare magnetic Fe3O4 nm particle, and using silane coupler to hold surface modification, and then using the modified magnetic Fe3O4 nm particle as a seed, and having polyreaction with dextran, N-isopropyl acrylamide, finally obtaining the magnetic thermometer nm particle with biocompatibility. The magnetic thermometer nm particle with biocompatibility synchronously has double responses of magnetism and thermometer property, and has wide application prospect in the fields of drug release, protein and enzyme separation.

The invention discloses a preparing method and application of a core-shell structure Fe3O4@MIL(Fe) composite material. According to the method, MIL(Fe) is prepared firstly with the solvothermal method, then FeCl3 ethylene glycol solution is transferred into a pore canal of MIL(Fe), nanometer Fe3O4 is obtained in the pore canal with the solvothermal method through in situ formation, and then the core-shell structure Fe3O4@MIL(Fe) composite material is obtained. A catalyst is high in catalytic activity, environmentally friendly, easy to recover and capable of being used repeatedly. Furthermore, equipment adopted in the method is simple, operation is convenient, organic pollutants in water can be degraded efficiently within a wide pH range, and application prospects are great.

The invention discloses a method for processing dye waste water based on activation of peroxymonosufate by three-dimensional ordered mesoporous CoFe2O4 and aims to solve the problem of low catalysis efficiency of present spinel CoFe2O4 to peroxymonosufate. The method is implemented through the following steps: firstly, three-dimensional ordered mesoporous CoFe2O4 is prepared; secondly, dye waste water with an appointed concentration is prepared, and the prepared solution is placed in a brown shake flask; thirdly, peroxymonosufate is added; fourthly, the three-dimensional ordered mesoporous CoFe2O4 is added; fifthly, the three-dimensional ordered mesoporous CoFe2O4 is separated by utilization of an applied magnetic field, and processing of dye in waste water based on activation of peroxymonosufate by three-dimensional ordered mesoporous CoFe2O4 can be completed. High-efficiency processing of dye waste water can be achieved by utilization of three-dimensional ordered mesoporous CoFe2O4 in cooperation with the peroxymonosufate technology, and the removal rate exceeds 90%. The cobalt ion leaching rate is low during the usage process, and environment pollution is reduced. The catalyst can be separated rapidly through an applied magnetic field and can be recycled, and the operation cost is lowered.

The invention discloses a method for preparing magnetic adsorbents on the basis of iron-based metal-organic framework materials and application of the magnetic adsorbents. The method includes preparing La-doped nanometer Fe3O4(La-Fe3O4) by the aid of solvent-thermal processes and then wrapping the surfaces of the nanometer Fe3O4(La-Fe3O4) with metal-organic framework materials MIL(Fe) to obtain magnetic composite materials La-Fe3O4@MIL(Fe); applying the magnetic composite materials La-Fe3O4@MIL(Fe) to absorbing and removing phosphate in water. The method and the application have the advantages that phosphate radicals in the water can be efficiently adsorbed and removed by the magnetic adsorbents, the magnetic adsorbents are environmentally friendly, are easy to recycle and are reusable, equipment for implementing the method is simple and is convenient to operate, and accordingly the method has an excellent application prospect.

The invention discloses a supported palladium catalyst Fe3O4/SiO2/Pd for Suzuki reaction, and a preparation method of the supported palladium catalyst Fe3O4/SiO2/Pd. The compound is a supported palladium catalyst material containing Fe3O4/SiO2/Pd, obtained by composite reaction of a precursor-based Fe3O4/SiO2 composite particles and Pd; the supported palladium catalyst Fe3O4/SiO2/Pd has the molecular characteristics that the compound structure contains a magnetic nanometer material Fe3O4 and porous absorption materials SiO2 and Pd; the supported palladium catalyst has relatively good magnetism, is easy to recover and reuse, and is a relatively ideal material as the supported palladium catalyst. The supported palladium catalyst is simple in synthesis route, mild in reaction condition, relatively high in yield and convenient to apply; post-treatment is simple; meanwhile, a secondary resource generated in biological mineral separation preparation and simulation and coal biological desulphurization by adopting thiobacillus ferrooxidans as a raw material; and a reference is provided for a comprehensive utilization technology of developing a metallurgical tail liquid or a desulphurization waste solution.

The invention relates to a new type composite conductive micro-balloon and the manufacturing method that is made up of high polymer micro-balloon core material and external conductive metal carcass material that is achieved by chemical coating method. It has the advantages of strong designability, good conductivity and wonderful sensitivity to temperature and pressure, and it is simple technology and low cost.

An intermediate region is formed at a central portion of an element in a track width direction, and an antiferromagnetic layer is not provided at the intermediate region. Accordingly, a sense current can be prevented from being shunted to the intermediate region, and as a result, improvement in reproduction output and strength against magnetic electrostatic damage can be realized. In addition, since the thickness of the central portion of the element is decreased, trend toward narrower gap can be realized. Furthermore, since the direction of magnetization of a free magnetic layer is oriented in the track width direction by shape anisotropy, means for orienting the magnetization is not necessary, and hence the structure and manufacturing method of the element can be simplified.

The invention discloses a magnetic super-hydrophobic fabric and a preparation method thereof. The preparation method comprises the following steps: immersing an ordinary fabric into a mixed solution of polydimethylsiloxane-containing ferric oxide particles modified by a silane coupling agent and an organic solvent to be stirred; taking out the fabric, placing the fabric at a position which is 1-5mm away from the lower side of a magnet, maintaining at a room temperature for 10-60 minutes, and granularly migrating the ferric oxide particles to the polydimethylsiloxane surface layer on the fabricdue to the magnetic field action during solvent evaporation; and finally, placing the fabric at a temperature of 80-130 DEG C, and performing heat curing on the polydimethylsiloxane to form a cross-linked structure, thereby obtaining the magnetic super-hydrophobic fabric with a micro-nano rough structure on the surface. According to the invention, the process is simple, and for the prepared magnetic super-hydrophobic fabric, a front water contact angle is 167 degrees, and water drops easily roll; and an opposite water contact angle is 154 degrees, and the water drops are easily adhered. In addition, the fabric has excellent magnetism and saturation magnetization reaching 1.285emu/g.

The invention provides a ternary magnetic composite photocatalytic nanomaterial and a preparation method and use thereof. The preparation method comprises the following steps: step 1, preparing a g-C3N4 photocatalyst; step 2, preparing WO3; and step 3, preparing the ternary magnetic composite photocatalytic nanomaterial. In the ternary magnetic composite photocatalytic nanomaterial prepared in the invention, the g-C3N4 photocatalyst is a novel organic visible-light-activated photocatalyst, and the Fe3O4 nanoparticles have excellent magnetism and electric conductivity. In addition, the WO3 as an inorganic semiconductor with good visible-light response has a band gap structure matching the g-C3N4. Therefore, according to the valence band theory and as reported in literatures, the WO3 can form a Z-type heterojunction photocatalyst having high photocatalytic activity with the g-C3N4. The composite material of such a special structure has improved photocatalytic effect such that the ternary magnetic composite photocatalytic nanomaterial prepared in the invention has excellent stability and photocatalytic degradation effect.

The invention relates to multiple anti-counterfeit watermark paper and a manufacturing method thereof. The watermark paper is provided with patterns, figures or lines which are woven or embroidered by non-water-soluble fibers or anti-counterfeit fibers; and the paper has rich levels and a concavo-convex touch feel under transmission light. A film, non-woven fabric or woven fabric made from a water-soluble material or a hot-melting material is used as a carrier, so that the patterns, the figures or the lines are woven or embroidered on the carrier by using the non-water-soluble fibers or the anti-counterfeit fibers; and the carrier with the patterns, the figures or the lines is released in front of a paper machine net through a positioning and releasing device so that the carrier is combined with paper. Compared with the conventional watermark, the patterns, the figures or the lines of the watermark paper are more fine and smooth; meanwhile, during processing of the patterns, the anti-counterfeit fiber loaded with one or more pieces of anti-counterfeit information (such as fluorescence, color, temperature variation, photoluminescence, magnetism and the like) is adopted; therefore, the watermark is integrated with vision, touch and multiple anti-counterfeit effects of the anti-counterfeit material as well as combination of the vision, the touch and the multiple anti-counterfeit effects.

A mineral dressing technique used for enriching nickel and/or cobalt is characterized in that limonite type ore and serpentine type ore are separated for mineral dressing, and adopt a sieve to be processed by classification for at least once after being processed by ore washing; mineral dressing is carried out on the products with granulometric classes, and the target concentrated ore is obtainedby the techniques of reelection and magnetic classification. According to the invention, after the limonite type ore and the serpentine type ore are treated by sieve classification, coarse fraction materials directly enter subsequent hydrometallurgy operation, so that the handling capacity of the selected crude ore is reduced, and the sorting conditions are improved; materials with medium fraction and fine fraction adopt a combined process flow of reelection and magnetic classification for sorting to obtain the target concentrated ore, so that the mineral quantity entering the process flow ofhydrometallurgy is reduced. Mineral dressing is respectively carried out on the limonite type ore and the serpentine type ore in lateritic nickel, thus obtaining the concentrated ore having higher quality, recovery rate and concentration ratio.

The invention provides a surface plasmon resonance sensing element and a manufacturing method thereof, belonging to the technical field of a sensor for biological system detection. The sensing element comprises a metallic membrane (2), a sensitive membrane and a magnet (3), wherein, the metallic membrane with a chromium membrane and a gold membrane as the sensing elements is plated on the bottom surface of a glass prism (1), the sensitive membrane composed of magnetic nanoparticles (4) subject to surface hydroformylation and an antibody (5) linked with an aldehyde group through a covalent bond is made on the metallic membrane, and the magnet is arranged under the glass prism. The manufacturing method of the sensing element comprises the following steps: preparation of the metallic membrane, preparation of Fe3O4 magnetic nanoparticles, preparation of ammoniated SiO2-coated magnetic nanoparticles, preparation of magnetic nanoparticles subject to surface hydroformylation and preparation of the sensitive membrane. The invention has the advantages of simple manufacturing process, high sensitivity, good biocompatibility and good selectivity and can be used in all antibody and antigen detection and protein and drug measurement.

The invention provides a nano compound with a multilayer structure, and applications thereof. The multilayer structure is composed of an inner core layer, an insolating layer, a main functional layer, and a double modified layer from inside to outside; the general structure formula of the nano compound is FeO-SiO<2>-TiO<2>-(X+FA); the inner core layer FeO is magnetic Fe3O4 or magnetic Fe2O3 or a mixture of magnetic Fe3O4 and Fe2O3; the isolating layeris SiO2; the main functional layer is TiO2; X in the double modified layer (X+FA) is one element selected from Zn, La, and Ce; FA is used for representing folic acid. The nano compound possesses magnetism, visible light responsiveness, bio specificity, and enhanced photocatalytic activity, and can be used in the photocatalysis field; steps are simple; operation is simple; and practicality is high.