134results about How to "Magnetic has" patented technology

The invention discloses a method for removing hexavalent chromium in wastewater through a magnetic adsorbent compounded by chitosan and magnetic biological carbon. The compounded magnetic adsorbent comprises the magnetic biological carbon, and the chitosan is combined on a magnetic biological carbon matrix. The preparation method comprises the following steps: firstly, utilizing FeCl3.6H2O to soak water hyacinth biomass; secondly, performing pyrolysis and calcination on the soaked biomass to obtain the magnetic biological carbon; finally, compounding the chitosan onto the surface of the magnetic biological carbon. The application steps are as follows: adding a composite material into the wastewater containing the hexavalent chromium with the concentration of 20-500 mg/L, wherein the usage amount of the composite material is 1-2 g/L; carrying out an oscillation and adsorption reaction at 10-50 DEG C for a period of time, and then separating the compound from the wastewater with a magnet to finish the removal of hexavalent chromium ions. The method has the advantages of being low in cost, simple in process, high in absorption property, easy in separation process, environmentally-friendly and the like.

The invention discloses a magnetic Co ₃ o ₄ The ‑C nanometer material and its preparation method and the application of activated persulfate as a catalyst in wastewater treatment belong to the technical field of water pollution control. In this method, cobalt metal-organic framework compounds are used as precursors, which are calcined at high temperature in a certain atmosphere, and finally magnetic Co ₃ o ₄ ‑C nanomaterials. The porous carbon component in this material not only acts as a carrier of metal oxides to evenly distribute the catalytic sites, but also effectively enriches pollutants in water to improve the degradation efficiency of the system; the magnetic Co in this material ₃ o ₄ The components can be used as heterogeneous catalysts to efficiently activate monopersulfate to generate free radicals to degrade pollutants in water bodies. The method has the characteristics of high efficiency and convenience, wide application range of pH, catalyst recovery by external magnetic field, good recyclability, and environmental friendliness, and has great potential in the actual treatment and application of organic wastewater.

The invention discloses a magnetic styrene alkali anion exchange microsphere resin and a preparation method thereof. The resin comprises a basic framework and magnetic particles positioned inside the basic framework. The basic framework of the resin has the structure as follows: radical A is one or a plurality of the picture below, wherein n is 1, 2, 3 to 20, R1, R2 and R3 are alkyl, and X is C1 or OH. The method comprises the following steps of: adding a dispersant to a water phase; mixing reactants, a stabilizing agent and a pore-foaming agent to form an oil phase; adding an evocating agent to the oil phase for full dissolution; adding the magnetic particles to the oil phase, adding the oil phase to the water phase to obtain resin particles, filtering to remove water content, and washing or extracting the resin particles; and swelling the obtained resin particles, and adding an amine reagent. The invention simplifies traditional synthesis process, and prepared resin has magnetism and has higher alkali exchange capacity and can be used for separating or removing dissolved organic matters and a plurality of anions in various wastewater, drinking water or natural water.

The invention provides a method for preparing magnetic cellulose aerogel from wastepaper, and relates to an aerogel preparation method. The invention aims at providing a method for preparing regenerated magnetic cellulose aerogel from the wastepaper. According to the method, the wastepaper material in life is used as a raw material for preparing a green, ultralight and highly porous aerogel oil absorbing material. The method comprises the following steps: step one. preparing regenerated cellulose from wastepaper; step two. preparing regenerated cellulose aerogel; step three. carrying out hydrophobic modification on the regenerated cellulose aerogel; and step four. preparing the regenerated magnetic cellulose aerogel oil absorbing material. The method has the advantages that the magnetic cellulose aerogel oil absorbing material is prepared from the wastepaper in life, the material can be greatly saved, the waste is turned into wealth, the regenerated magnetic cellulose aerogel is simple in a preparation technology, low in cost, convenient to use, capable of effectively absorbing multiple organic solvents and oil matters leaked in water, and high in absorption rate, the oil absorption is thorough, the oil absorbing material is nontoxic and harmless and causes very little secondary pollution, and an adopted magnetic collection method is simple, convenient and easy to use.

The present invention relates to a method for preparing a porous magnetic imprinting absorption agent through emulsion polymerization, and belongs to the technical field of environment function material preparation. The method comprises: preparing magnetic halloysite, carrying out vinyl modification on the halloysite, adopting a dispersion solution of the modified magnetic halloysite and 2,2'-azobis(2-methylpropionamidine) dihydrochloride as a water phase, adopting a mixture of a template molecule cyhalothrin, a function monomer methacrylic acid, a cross-linking agent ethylene glycol dimethacrylate, a pore-forming agent and an organic solvent chloroform as an oil phase, mixing the water phase and the oil phase, carrying out an ultrasonic treatment to prepare stable Pickering emulsion, carrying out polymerization to prepare porous magnetic imprinting, adopting a methanol and acetic acid mixing solution to wash to remove the template molecule, and carrying out vacuum drying on the obtained porous magnetic imprinting at a temperature of 50 DEG C, wherein the obtained product is used for selective recognition and separation of cyhalothrin in an aqueous solution. The prepared porous magnetic imprinting absorption agent has characteristics of significant thermal stability, significant magnetic stability, high absorption capacity, and significant cyhalothrin molecule recognition property.

The invention discloses a method for preparing magnetic cellulose aerogel by utilizing waste paper. An ultra-light multi-porous gas magnetic hydrophobic aerogel adsorbing material is prepared by using waste paper fibres in life as a raw material; waste paper regenerated cellulose gel is prepared by utilizing an microwave auxiliary ionic liquid dissolution method; black red waste paper cellulose aerogel is obtained through magnetic modification and hydrophobic and oleophobic modification. The magnetic cellulose aerogel disclosed by the invention can effectively remove a variety of organic pollutants and oily materials leaked in water; the absorption multiplying power is high; oil is absorbed thoroughly; an adsorbing material is non-toxic and harmless; the adopted magnetic collecting method is simple and easy to use; secondary pollution is low; the preparation method is simple in process and mild in conditions; waste can be changed into treasure by conventional industrial equipment and low-cost raw materials; the emission of waste water, waste gas and waste residues is avoided in a production process; the method has a wide popularization application value and social significance.

A magnetic levitation synchronous belt conveyor comprises a driving device, a transmission shaft, synchronous belt wheels, a magnetic conveying belt-permanent magnet suspension supporting device, a machine frame and a return roller. The driving device is connected with the transmission shaft which is provided with the two synchronous belt wheels in parallel. Synchronous belts are wound on the two synchronous belt wheels which are arranged in parallel respectively. The two synchronous belts are fixed at the edge of the inner surface of a conveying belt and are arranged in parallel. Permanent magnets are fixed at the center line of the inner surface of the conveying belt and are arranged at equal distance in the conveying direction on the inner surface of the conveying belt. A permanent magnet supporting device is fixed on the machine frame and replaces an upper roller support of a common belt type conveyor. According to the magnetic levitation synchronous belt conveyor, the conveying belt has magnetism, system manufacturing cost and maintaining cost are low, deviation and slipping cannot happen, operation resistance is low, efficiency is high, energy loss is low, operation is stable, noise is low, and high-speed operation can be achieved.

The invention discloses a construction method for magnetic putty powders and magnetic wall surfaces. According to the part by weight, the magnetic putty powder consists of 5-60 parts of putty powders or adhesive and 95-40 parts of magnetic iron mine powders or iron powders which are uniformly mixed with each other; when the magnetic putty powder of the invention is used for plastering the wall surface, according to the design requirement, a trough with a certain length, width and depth is remained on the new wall surface which is not decorated or no the original wall surface; the magnetic putty powder added with water is uniformly mixed to prepare the magnetic putty; subsequently, the magnetic putty is filled in the trough and plastered flatly; after the magnetic wall surface is dried, required coatings are brushed on the magnetic wall surface. When the magnetic putty of the invention is used for plastering the wall surface, the wall surface has magnetism, facilitates the hanging of drawings, paints and decorations, and is convenient and beautiful.

The invention provides a compound material used for hexavalent chromium removal and a preparation method thereof. The compound material is prepared from charcoal and magnetic ferriferrous sulfide loaded onto a charcoal matrix; the preparation method comprises the steps that through a pyrolysis and calcination method, rice hull is used as a raw material to prepare the charcoal; the charcoal is immersed in a solution containing ferrous sulfate, L-cysteine is used as a sulfur source, ethylene glycol is used as a solvent, and through a solvothermal method, the magnetic charcoal/ferriferrous sulfide compound material is synthesized in one step; application comprises the steps that the compound material is added into hexavalent chromium wastewater with a concentration of 20 mg/L, the usage amount of the compound material is 0.2-1.0 g/L, and after oscillatory reaction is carried out for a period of time at 25 DEG C, a magnet is used for separating the compound material and the solution, so that hexavalent chromium ions in the wastewater are removed. The compound material used for hexavalent chromium removal and the preparation method thereof have the advantages that the compound materialpreparation method is simple, low in cost, environmentally friendly and high in efficiency of removing the hexavalent chromium ions in the wastewater and the like.

The invention provides a method for preparing and synthesizing a ferroferric-oxide-supported cobalt selenide magnetic nano composite material by a hydrothermal process and application thereof, belonging to the technical field of preparation and application of nano materials. The invention does not need to previously prepare any template or use any surfactant, has the advantage of mild reaction process, and is easy to control; and the obtained ferroferric-oxide-supported cobalt selenide magnetic nano composite material has high activities in catalyzing reduction of nitrophenol and adsorbing methylene blue. The result indicates that 1mg of ferroferric-oxide-supported cobalt selenide magnetic nano composite material can completely catalyze the nitrophenol in 0.1ml of 5.0*10<-3>M nitrophenol solution by only 13 minutes; and 50mg of ferroferric-oxide-supported cobalt selenide magnetic nano composite material can completely adsorb the methylene blue in 50ml of 5mg/L methylene blue solution by only 25 minutes. Besides, the prepared sample has magnetic property, thus, can be conveniently separated and collected with a magnet, and is convenient for recycling.

The invention discloses a micro-arc oxidation preparation method of a magnetic TiO2 bioactive coating. In an air environment, an electrolytic solution containing calcium salt, phosphor salt and molysite is taken, a pH value of the electrolytic solution is adjusted to be 5.0-5.3, titanium or a titanium alloy is taken as an anode, stainless steel is taken as a cathode, and titanium or the titanium alloy is subjected to micro-arc oxidation treatment for 1-8min by adopting a pulsed power supply, with the temperature of the electrolytic solution being kept at 5-25 DEG C, thus the magnetic TiO2 bioactive coating is generated on a surface layer of titanium or the titanium alloy. The magnetic TiO2 coating having magnetism (Ms being 0.2696-1.101emu/g) and good bioactivity can be prepared with the adoption of the micro-arc oxidation preparation method.

The invention relates to the technical field of carbon aerogel, in particular to a preparation method of iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel. The preparation methodcomprises the following steps: (1) dissolving chitosan in an acetic acid solution, adding a trivalent iron salt solution, executing stirring until the reaction is completed to obtain a uniform and stable red-brown viscous transparent solution, and executing vacuum freeze drying to obtain chitosan-Fe<3+> chelate aerogel; (2) executing carbonization: obtaining a black aerogel carbonized sample; (3)executing activation: obtaining the iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel. The chelate formed by the nitrogen-containing high molecular material chitosan and ferric salt is used as a carbon source, a nitrogen source and an iron source to prepare the iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel, the iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel has large specific surface area and an ideal pore structure and can present good electrocatalytic oxygen reduction activity, electric double-layer super capacitance performance and organic dye adsorption performance by adjusting the iron content.

The invention relates to the field of coatings, and discloses a superstrong magnetic coating and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 30-50 parts of film-forming resin, 50-450 parts of permanent magnet powder, 30-50 parts of diluents, 1-3 parts of a defoaming agent, 3-5 parts of a coupling agent and 3-10 parts of a toughening agent. The preparation method includes the following steps that magnetizing operation is performed on the permanent magnetic powder; primary stirring operation is performed on the permanent magnetic powder, the diluent, the defoaming agent, the coupling agent, the toughening agent and part amount of the film-forming resin to enable the raw materials to be mixed uniformly to obtain mixed liquid; andsecondary stirring operation is performed on the mixed liquid and the remaining amount of the film-forming resin to enable the raw materials to be mixed uniformly to obtain the superstrong magnetic coating. The coating has higher magnetic powder content and higher magnetic absorption performance, can attract hard magnetic materials such as magnets, and can attract soft magnetic materials such as iron, cobalt and nickel, and the application range of magnetic coatings is greatly expanded.

The invention discloses magnetic anti-counterfeiting aluminum-foil paper, which comprises base paper and an aluminum-foil layer, wherein the surface of the aluminum-foil layer is coated with a layer of magnetic coating with a thickness of 10 to 40 microns; the coating is prepared from the following raw materials in percentage by mass: 15 to 25 percent of polyurethane resin, 5 to 10 percent of magnetic nano silica, 50 to 70 percent of organic solvent, 0.3 to 0.5 percent of aluminum oxide, 0.5 to 1 percent of dispersant, 0.1 to 0.5 percent of coupling agent, 0.5 to 1.5 percent of lubricant, 0.5 to 1 percent of antistatic agent and 2 to 5 percent of toluene diisocyanate. According to the magnetic anti-counterfeiting aluminum-foil paper, the surface of the aluminum-foil paper is coated with a layer of magnetic material; the part into which magnetic powder is added is different from other aluminum-foil paper in hand feeling, and particularly can be identified through a magnetic metal identifier or a magnetic induction device, so as to achieve an anti-counterfeiting purpose.

The invention discloses an automatic recovery device of medical infusion apparatus. A magnet layer comprises magnetic conduction blocks and electromagnets, and each magnetic conduction block corresponds to one set of electromagnet, and the electromagnets are electrified to generate magnetism; through conduction, the corresponding magnetic conduction blocks also have magnetism due to the fact thatiron cores of the electromagnets are attached to the bottom surfaces of the corresponding magnetic conduction blocks, needle heads are attracted to adjacent positive pole pieces and negative pole pieces, and then the positive pole pieces and the negative pole pieces are conducted; the needle heads are heated after being electrified, and under the centrifugal action of needle tubes, the heated needle heads and the needle tubes are separated; the separated needle heads are subjected to action by the magnetic conduction blocks, so that the needle heads are not prone to be separated from a ceramiclayer corresponding to the magnetic conduction blocks during subsequent separation; according to the device, one magnetic conduction block corresponds with one end of a coil of the electromagnets andis connected with the positive pole of a power supply through thermistors, and the positive pole pieces arranged on the ceramic layer corresponding to the magnetic conduction blocks are also connected with the positive pole of the power supply through the same thermistors; and when the needle heads are attracted on the ceramic layer corresponding to the magnetic conduction blocks, the needle heads are heated, the heated needle heads are separated from the needle tubes under the centrifugal action of the needle tubes.

The invention discloses a preparation method of a porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst is characterized by comprising the following steps: dissolving wool by using 1-allyl-3-methylimidazolium bromide and adding polyvinyl alcohol and nano ferroferric oxide to obtain porous magnetic composite wool particles; preparing bulking rhodium-doped BiOBr powder by using a combustion method; and then adding the following components in a reactor in percentages by mass: 72-78% of liquid paraffin and 4-8% of sorbitan fatty acid ester, adding 2-5% of rhodium-doped BiOBr powder while stirring violently, adding 12-18% of porous magnetic composite wool particles, stirringand reacting, carrying out solid-liquid separation, washing with anhydrous ethanol, and drying to obtain the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst has the characteristics that the preparation method is simple, the stability of the catalyst is good, and the catalyst can be degraded and is environmentally friendly and the like; and the catalyst is easy to recycle, reaction conditions are gentle, the catalytic activity is high, the use amount is small and the like.

The invention discloses a gas-coagulation lightweight surface exterior wall coating, and belongs to the technical field of building coatings. The gas-coagulation lightweight surface exterior wall coating comprises the following components in parts by weight: 25-30 parts of a film forming emulsion, 10-20 parts of titanium white powder, 5-6 parts of kaolin, 24-30 parts of heavy calcium, 1-1.5 pats of an anti-freezing agent, 0.4-0.8 part of an anti-foaming agent, 0.2-0.5 part of an adhesion accelerator, 0.1-0.15 part of an anti-radiation agent, 1-2 parts of an anti-cracking enhancer, 0.1-0.2 partof a wetting agent, 0.8-1.2 parts of a film-forming auxiliary agent, 0.1-0.2 part of a cellulose thickener, 0.1-0.3 part of a dispersant, 0.2-0.3 part of a PH regulator, 1-3 parts of a viscosity stabilizer, 5-6 parts of silver nanoparticles, 5-6 pats of a magnetic aerogel, and 10-20 parts of deionized water. By the lightweight and heat insulation characteristics of the magnetic aerogel, the exterior wall coating is endowed with the characteristics of gas-coagulation and lightweight, and the uniform dispersion of the magnetic aerogel in the coating is guided by applying the external magnetic field in the mixing process, so that the overall performance of the coating is improved, such as cracking resistance, viscosity and heat insulation of the coating.

The invention provides a sulfur-doped graphite-like carbon nitride nanosheet loaded graphene and ferroferric oxide composite magnetic photocatalyst. A sulfur-doped graphite-like carbon nitride nanosheet is taken as a carrier, and graphene and ferroferric oxide particles are modified on the sulfur-doped graphite-like carbon nitride nanosheet. The preparation method comprises the following steps: preparing sulfur-doped graphite-like carbon nitride nanosheets by using thiourea through high-temperature pyrolysis, preparing a sulfur-doped graphite-like carbon nitride loaded graphene composite material by using an impregnation method, and preparing the sulfur-doped graphite-like carbon nitride loaded graphene and ferroferric oxide composite photocatalyst material by using an alkaline-thermal coprecipitation method. The composite magnetic photocatalyst has the advantages of high photocatalytic activity, good stability, magnetic force and easy recovery, and the preparation process has the advantages of simple operation, low cost and good safety. The composite magnetic photocatalyst can be used for treating wastewater containing various antibiotics and is good in stability and practicability, high in efficiency, easy and convenient to operate, low in cost and high in recycling value.

The invention relates to a magnetic covalent triazine framework material, and a preparation method and an application thereof. The magnetic covalent triazine framework material comprises a covalent triazine framework and Fe3O4. The magnetic covalent triazine framework material of the invention is magnetic, is convenient to recycle, can be used in wastewater treatment, and also can be used in the degradation of antibiotics as a catalyst. The preparation method of the invention is characterized in that terephthalonitrile is rapidly condensed with microwaves as a heat source and Fe3O4 as a microwave absorption and transmission medium. The presence of the Fe3O4 makes a powder aggregate in the reaction process in order to make the powder not prone to fly over, so the reaction is complete.