65 results about "Triiron Tetraoxide" patented technology

The invention relates to the field of material chemistry on-line detection, in particular to a 1, 2, 4-trichlorobenzene on-line detection material and a preparation method thereof, and provides a film-forming sensitive layer material capable of being coated on the surface of a transducer, and the film-forming sensitive layer material comprises chitosan, a crosslinking component with the content of 0.1-5wt% in terms of glutaraldehyde and magnetic core-shell molecularly imprinted particles after being dried, the magnetic core-shell molecularly imprinted particle contains a ferroferric oxide magnetic inner core, a silicon dioxide middle layer and a molecularly imprinted polymer shell layer, and the shell layer is a cyclodextrin methacrylate and ethylene glycol dimethacrylate copolymer network and takes 1, 2, 4-trichlorobenzene as a template. The material keeps the membrane integrity and long-term stability under the working conditions of circulation and regeneration and also gives consideration to quick response, and the residual 1, 2, 4-trichlorobenzene is controlled to be not greater than 0.10 wt% and the residual glutaraldehyde is controlled to be not greater than 0.5 wt%. The method is used for relieving structural mass transfer contradiction and processing and coating coupling contradiction caused by high filler load, and has online detection application value.

The invention relates to the technical field of flame-retardant ABS (Acrylonitrile Butadiene Styrene) materials, in particular to an ABS composite material with good flame retardance and a preparation method thereof. The ABS composite material disclosed by the invention is prepared from the following raw materials in parts by weight: 80 to 100 parts of ABS, 15 to 18 parts of tetrabromobisphenol A, 3 to 5 parts of a synergistic flame retardant and 0.1 to 0.5 part of an antioxidant, the synergistic flame retardant is obtained by grafting ferroferric oxide on the surface of expandable graphite and then coating phytic acid; the ABS composite material disclosed by the invention has excellent flame-retardant capability and also has relatively good tensile strength and impact strength, and the problem that the mechanical strength of a traditional flame-retardant ASB material is greatly reduced due to the addition of a flame retardant is avoided.

The invention belongs to the technical field of adsorbents, and discloses a core-shell structure composite material as well as a preparation method and application thereof. Ferroferric oxide is loaded on biochar by coprecipitation of ferric salt, ferrous salt and biochar, amination modification is performed by using polyethyleneimine, and a COF shell layer is prepared in situ by using a magnetic core. The shell layer is chemically connected with the magnetic core, and is coated by the COF shell, so that the structural stability is improved, the porous structure of the biochar is not easy to collapse, and the magnetic particles are not easy to fall off; the shell contains sulfonic acid groups, has electronegativity, and is combined with metal ions through electrostatic interaction, so that the adsorption sites of the adsorbent are increased. Meanwhile, the COF shell is of a porous structure, the specific surface area is large, the COF shell has the adsorption effect on metal ions, more adsorption sites are provided for the metal ions through the multiple adsorption effects of the COF shell and the magnetic core, and the removal rate is effectively increased.

The invention discloses a dual-circulation phase-change heat storage material for drilling fluid of a deep high-temperature oil and gas field and a preparation method of the dual-circulation phase-change heat storage material, and belongs to the technical field of petroleum drilling fluid. The preparation method comprises the following steps: (1) mixing and ball-milling expanded graphite and ferroferric oxide nanoparticles, and performing ultrasonic treatment in a solvent to obtain a suspension; and (2) mixing a mixed solution composed of trihydroxymethyl aminomethane and pentaerythritol with the suspension obtained in the step (1), then carrying out ultrasonic treatment and stirring, and finally drying to obtain the product. The preparation method is simple and high in preparation efficiency, and the prepared phase change heat storage material has an adjustable double-peak heat absorption characteristic and high heat conductivity, also has excellent recoverability and real-time monitoring performance, can be applied to cooling of drilling fluid in deep wells and ultra-deep wells, has double-circulation characteristics of heat energy circulation and phase change material circulation, and has wide application prospects. The drilling fluid can stably exist in an underground high-temperature environment, normal development of drilling work is ensured, and the drilling fluid has a wide application prospect.

The invention discloses an oriented carbon fiber filled organic silicon composite material and a preparation method and application thereof, and belongs to the technical field of polymer-based heat conduction interface materials.The preparation method includes the steps that carbon fibers are subjected to surface treatment and oxidation treatment to obtain oxidized carbon fibers; adding the oxidized carbon fiber and phytic acid into water to obtain phytic acid modified carbon fiber; adding the phytic acid modified carbon fiber into water, adding ferric chloride and ferrous sulfate, fixing iron ions on the surface of the phytic acid modified carbon fiber, and adding sodium hydroxide to obtain phytic acid-ferroferric oxide modified carbon fiber; the preparation method comprises the following steps: mixing vinyl silicone oil, hydrogen-containing silicone oil and a catalyst, adding the phytic acid-ferroferric oxide modified carbon fibers, homogenizing and defoaming, arranging the phytic acid-ferroferric oxide modified carbon fibers in an external magnetic field in an oriented orientation manner along the direction of the magnetic field, and curing to obtain the oriented carbon fiber filled organic silicon composite material. The phytic acid and the ferroferric oxide are introduced, so that the carbon fiber still has excellent heat-conducting property under the condition of low filling amount.

The invention belongs to the technical field of thermal management materials, and particularly relates to a modified boron nitride-epoxy resin composite material and a preparation method and application thereof. The modified boron nitride-epoxy resin composite material provided by the invention comprises an epoxy resin matrix and a heat-conducting filler dispersed in the epoxy resin matrix, the heat conduction filler comprises glycine modified boron nitride and magnetic modified boron nitride nanosheets, and the magnetic modified boron nitride nanosheets are glycine modified boron nitride nanosheets coated with ferroferric oxide particles. According to the invention, glycine modified boron nitride and magnetic modified boron nitride nanosheets are adopted as heat-conducting fillers, so that the interface interaction is enhanced, the dispersity of the boron nitride fillers in an epoxy resin matrix is improved, and the heat-conducting fillers form a filler network with a three-dimensional structure in the epoxy resin matrix, so that free transmission of phonons is facilitated; therefore, the heat conductivity of the modified boron nitride-epoxy resin composite material is improved.

The invention relates to the technical field of coatings, in particular to a photo-thermal super-hydrophobic coating as well as a preparation method and application thereof. The invention provides a photo-thermal super-hydrophobic coating. The photo-thermal super-hydrophobic coating is prepared from the following raw materials in parts by weight: 3 to 5 parts of organic silicon polysilazane, 5 to 7 parts of methyl phenyl polysiloxane, 3 to 5 parts of vinyl chloride and vinyl acetate copolymer, 4 to 6 parts of modified ferroferric oxide, 5 to 7 parts of fluorinated multi-walled carbon nanotube, 4 to 6 parts of fluorinated black titanium dioxide, 59 to 82 parts of organic solvent and 0.02 to 0.2 part of defoaming agent. Wherein the modified ferroferric oxide is ferroferric oxide coated with copper chloride. The photo-thermal super-hydrophobic coating provided by the invention has ultrahigh hydrophobic performance and good photo-thermal conversion performance, the water contact angle can reach 155 degrees or above, the rolling angle is less than 10 degrees, the surface hardness of the coating is 4H or above, the adhesive force is grade 0, and the comprehensive performance is excellent.

The application relates to high-quality steel slag aggregate and a preparation method and application thereof, the method is a grading carbonization process, which comprises the following steps: (1) primary carbonization and reduction: taking molten steel slag in a state of 1300 DEG C-1500 DEG C as raw material, continuously introducing industrial waste gas into a hot steaming tank for carbonization in a water spraying cooling process for 8h-14h, meanwhile, making the diiron trioxide in the steel slag be reduced into iron single element and magnetite, and obtaining primary carbonized steel slag; the volume ratio of CO2 in the industrial waste gas is 20%-30%, and the volume ratio of CO is 30%-60%; (2) secondary carbonization: selecting the primary carbonized steel slag below 10mm in step (1) as aggregate, spraying the steel slag aggregate according to a preset spraying amount in a closed container, maintaining the pressure in the closed container as 0.3-0.5 Mpa, continuously introducing the same industrial waste gas into the closed container for secondary carbonization, and making the free calcium oxide content in the steel slag aggregate be lower than 3%; and magnetically selecting the high-quality steel slag aggregate after secondary carbonization. According to the method, the high-quality steel slag aggregate meeting the relevant technical requirements can be prepared within 24h, and is used for preparing asphalt concrete.

This invention relates to the field of electroosmotic reinforcement technology, and particularly to an anti-corrosion coating for electroosmotic reinforcement electrodes, its preparation method, the electrode, and a method for electroosmotic reinforcement of soft soil. An embodiment of this invention discloses an anti-corrosion coating for electroosmotic reinforcement electrodes. The raw materials, calculated by weight, include: 32-40 parts of organosilicon epoxy resin, 2-4 parts of carbon black, 4-8 parts of graphite, 1-2 parts of carbon fiber filament, 2-4 parts of iron(III) oxide, 0.5-1 part of silver powder, 1-2 parts of organobentonite, 0.5-1.5 parts of talc, 15-20 parts of methyl isobutyl ketone, 8-12 parts of xylene, 3-5 parts of polyvinyl alcohol, 3-8 parts of tributyl phosphate, 0.5-1 part of polysiloxane, 0.5-1 part of polyethylene glycol, 1-5 parts of butyl butyrate, and 1-5 parts of polyaniline. The anti-corrosion coating used in this invention, when applied to the electrode for electroosmotic reinforcement, exhibits excellent conductivity and anti-corrosion properties, as well as good sealing performance and resistance to cracking.

The invention discloses a porous carbon composite material for degrading antibiotics through combination of photocatalysis and microorganisms and a preparation method of the porous carbon composite material, and belongs to a water treatment technology and catalyst development. Mixing and dispersing the titanium dioxide-porous carbon, a silane coupling agent, ferroferric oxide powder, deionized water and absolute ethyl alcohol to form dispersion liquid, and heating the dispersion liquid to react to obtain magnetized titanium dioxide-porous carbon; and carrying out mixed culture on the magnetized titanium dioxide and porous carbon and the bacterial suspension to obtain the porous carbon composite material. Titanium dioxide porous carbon obtained through modification and magnetic ferroferric oxide react through a silane coupling agent to obtain magnetized titanium dioxide porous carbon, and then bacterium suspension capable of degrading antibiotics and the magnetized titanium dioxide porous carbon are mixed and cultured to obtain the porous carbon composite material. The degradation capacity on antibiotics in the water body is improved, meanwhile, separation is easy, and secondary pollution to the water body is avoided.

The invention discloses a metal oxide composite sodium ferric sulfate positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of sodium ion battery positive electrode materials. The metal oxide composite sodium ferric sulfate positive electrode material comprises the following raw materials in parts by mass: 1-20 parts of sodium sulfate, 2-40 parts of ferrous sulfate, 0.05-1 part of an antioxidant, 0.05-1 part of a carbon source and 0.01-2 parts of metal oxide, the metal oxide is at least one of ferrous oxide, ferric oxide, ferroferric oxide, manganese oxide, manganese dioxide, cobalt oxide, cobaltosic oxide, cobaltic oxide, vanadium monoxide, vanadium dioxide, vanadium trioxide, vanadium pentoxide, nickel oxide and copper oxide. The invention also discloses a preparation method and application of the metal oxide composite sodium ferric sulfate positive electrode material. The method provided by the invention can solve the problems of low conductivity and specific capacity of the existing sodium ferric sulfate positive electrode material, and has the advantages of low cost, strong process adaptability and wide application prospect.

The invention discloses a sewage treatment agent and a preparation method thereof, and relates to the field of sewage treatment agents. When the sewage treatment agent is prepared, ferroferric oxide and tetrabutyl titanate are evenly mixed and then grafted with 3-chloropropyltrimethoxysilane, and pre-modified magnetic titanium dioxide is obtained; the pre-modified magnetic titanium dioxide and N, N-bis (2-chloroethyl) propan-1-amine are subjected to a reaction, and modified magnetic titanium dioxide is obtained; the preparation method comprises the following steps: reacting gallium nitrate nonahydrate with 2-aminoterephthalic acid, soaking in methanol, and grafting 6-(1H-imidazole-2-yl) pyridylaldehyde for reaction to obtain modified MIL-68 (Ga); and reacting the modified magnetic titanium dioxide with the modified MIL-68 (Ga) to obtain the sewage treatment agent. The sewage treatment agent prepared by the invention has excellent photocatalytic degradation performance, heavy metal ion complexing performance and anion adsorption performance.

The application discloses a method for deep degradation of large-flow mixed organic waste gas, comprising the following steps: a) preparing ferroferric oxide / stannous sulfide composite microspheres; b) performing surface modification on carbon nanotubes by using a mixed solution of nitric acid and perchloric acid; c) performing surface modification on the carbon nanotubes after acid treatment by using a ferric chloride solution; d) mixing hydrogen peroxide, the ferroferric oxide / stannous sulfide composite microspheres and the surface-modified carbon nanotubes to obtain a suspension; e) adding the suspension into a circulating bubble-spraying-mist removal integrated device to form a multifunctional layered bubble liquid in a bubble zone thereof; f) pumping the upper liquid in the bubble liquid as spraying liquid for a spraying backflow zone; and g) discharging the waste gas after being treated by the bubble-spraying process and then absorbed by a mist removal backflow zone. The method has stable treatment efficiency on organic waste gas, can realize recycling of reaction suspension, and obviously improves the deep purification efficiency on industrial waste gas.

The application discloses a kind of sewage treatment flocculants, its preparation method is as follows: (1) the modification treatment is carried out to chitosan, obtains primary modified product;(2) further processing is carried out to the primary modified product, obtains secondary modified product;(3) obtains chitosan modified product;(4) obtains magnetite modified product by treating nano magnetite powder;(5) the chitosan modified product and magnetite modified product are combined, and the sewage treatment flocculants are obtained.The flocculants prepared by the method have good adsorption removal effect on heavy metals in sewage, and the treatment operation process is simple, the required removal time is short, the sewage heavy metal purification efficiency is high, and has higher application value.

This invention discloses a carbon-ceramic brake disc and its preparation method, relating to the field of carbon-ceramic brake disc technology. This invention uses plain weave fabric instead of non-woven fabric, increasing the structural strength. Furthermore, the friction layer uses a mesh, solving the defect of easy shedding of non-woven fabric on the friction surface. The mesh fiber content is significantly reduced, increasing the ceramic content on the friction surface, thereby improving the material's wear performance. This invention prepares a wear-resistant magnesium hydroxysilicate, then combines it with porous molybdenum disulfide. By adding ferric chloride and ferric chloride tetrahydrate, the porous molybdenum disulfide-magnesium hydroxysilicate composite is loaded with iron oxide, further improving the strength and wear resistance of the carbon-ceramic brake disc.

The present invention relates to the technical field of fabrics, and particularly relates to a magnetic therapy fabric containing heat-generating polyamide fibers, a preparation method thereof, and an application thereof. The magnetic therapy fabric containing heat-generating polyamide fibers in the present invention includes an inner fabric layer and an outer fabric layer. The air layer formed by the gap between the two fabric layers improves the heat preservation performance of the fabric. The fabric is made of polyamide fibers and has good wear resistance. By adding additives, the components of the additives include far-infrared heat-generating material graphene oxide, magnetic material iron tetroxide, and alkyl quaternary ammonium salt, which can achieve its far-infrared heat-generating performance and magnetic therapy performance. At the same time, it can improve its antistatic performance and antibacterial performance; the polyamide fabric is subjected to finishing and modification treatment, which can further enhance the antibacterial performance, antistatic performance, and moisture absorption performance of the polyamide fabric. The prepared magnetic therapy fabric containing heat-generating polyamide fibers in the present invention has a wide application in the field of textiles such as health care clothing.

The invention relates to the technical field of epoxy resin composite material production, in particular to a high-thermal-conductivity flame-retardant composite material and a preparation method thereof.The preparation method comprises the steps that the surface of nickel-plated graphite is subjected to silane treatment, ferroferric oxide and magnesium hydroxide (aluminum hydroxide) are prepared into a mixture through ball milling, and then the mixture is evenly mixed with epoxy resin and a curing agent; then, by means of the effect of a surface magnetic field, a compound of nickel-plated graphite, trioxide and magnesium hydroxide is settled to the bottom, bottom heating is carried out to promote bottom epoxy cross-linking curing, and meanwhile the upper fluidity is kept; and finally, overturning the sample, promoting the upper nickel-plated graphite and the compound of the trioxide and the magnesium hydroxide to settle to the other side by virtue of the action of a surface magnetic field, and finally heating the bottom for crosslinking and curing, thereby obtaining the sandwich type anisotropic electric-conduction and heat-conduction epoxy adhesive. The use amount of the filler in the epoxy resin composite material is reduced, and relatively good conductive and flame-retardant effects can be realized at the same time.

The invention provides carboxyl magnetic silicon dioxide composite microspheres as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing calcium carbonate microspheres with uniform particle size and good dispersity through a specific chemical reaction or physical method, and then uniformly coating silicon dioxide on the surfaces of the calcium carbonate microspheres by using a chemical method to form the silicon dioxide-calcium carbonate composite microspheres. And then etching the calcium carbonate part in the composite microsphere by adopting a proper etching agent to leave the silicon dioxide microsphere with the hollow structure. Iron is deposited in the hollow silicon dioxide microspheres through an in-situ method, and the iron-silicon dioxide composite microspheres are formed. Then, the surface of the magnetic silicon dioxide is coated with a layer of polyurea, so that leakage of ferroferric oxide is prevented; finally, carboxyl is coupled to the surface of the polyurea layer through a chemical reaction to obtain the composite microsphere with a specific function, so that the composite microsphere can be specifically combined with other biological molecules or drugs, and applications of drug delivery, separation and purification and the like are realized.

The invention belongs to the technical field of new energy, and particularly relates to an iron source, a lithium iron phosphate material and a preparation method and application thereof. According to the invention, by designing the core-shell structure of the iron source Fe2O3 coated Fe3O4 and limiting the content of ferroferric oxide in the iron source, the iron source is applied to the preparation of the lithium iron phosphate material, an inner layer structure rich in microcracks and pores is easily obtained, the lithium ion transport kinetics and the wettability of an electrolyte are improved, and the rate and capacity performance of the lithium iron phosphate material are broken through.

The invention provides a method and system for removing total phosphorus and fluoride in stainless steel wastewater, and the method comprises the following steps: carrying out flocculent precipitation treatment on the stainless steel wastewater by using a composite flocculant to obtain a primary treatment liquid; and conveying the primary treatment liquid to an adsorption tower provided with a modified ternary composite filler for adsorption treatment to obtain a secondary treatment liquid. According to the method and the system for removing total phosphorus and fluoride in the stainless steel wastewater provided by the invention, phosphate, fluoride and heavy metal ions in the stainless steel wastewater can be synchronously adsorbed by utilizing the composite flocculant obtained by compounding the polyaluminum sulfate solution and the polyferric sulfate solution; residual total phosphorus and fluoride can be efficiently removed by utilizing the synergistic effect of activated aluminum oxide, graphene and ferroferric oxide in the modified ternary composite filler through a multi-element synergistic mechanism of adsorption, ion exchange and complex reaction.

The present disclosure relates to a mixed carbonized iron phase catalyst and a preparation method thereof. The mixed carbonized iron phase catalyst comprises 41-65 mol% of Fe7C3, 35-57 mol% of χ-Fe5C2 and 0-2 mol% of iron-containing impurities, in terms of total molar content of the mixed carbonized iron phase catalyst; the iron-containing impurities are triiron tetroxide. The catalyst prepared by the method contains Fe7C3 phase and χ-Fe5C2 phase, so that the catalyst has high CO conversion rate and low CH4 and CO2 selectivity; the method for preparing the catalyst of the present disclosure is simple, can produce the catalyst in large quantities, and the prepared catalyst has good activity and stability, and has good application prospect.

The invention discloses a carbon fiber reinforced polyether-ether-ketone composite material and a preparation method thereof, and relates to the technical field of high polymer materials. When the carbon fiber reinforced polyether-ether-ketone composite material is prepared, firstly, a diamino monomer reacts with 3, 3 ', 4, 4'-benzophenone tetracarboxylic dianhydride to prepare a water-based ultraviolet absorption sizing agent; growing a metal organic framework on the activated carbon fibers in situ to prepare modified carbon fibers; the preparation method comprises the following steps: filling ferroferric oxide into carboxylated carbon nanotubes, and reacting with KH-550 to obtain modified carbon nanotubes; dispersing a water-based ultraviolet absorption sizing agent and modified carbon nanotubes in water, and soaking the modified carbon fibers in the water-based ultraviolet absorption sizing agent to obtain sized carbon fibers; and alternately laying the polyether-ether-ketone powder and the sizing carbon fibers, and carrying out hot press molding to prepare the carbon fiber reinforced polyether-ether-ketone composite material. The carbon fiber reinforced polyether-ether-ketone composite material prepared by the invention has the advantages of high bending strength, high interfacial shear strength, aging resistance and strong electromagnetic shielding performance.

The invention belongs to the technical field of inorganic new materials, and provides iron phosphate and a preparation method and application thereof.The preparation method of the iron phosphate comprises the following steps that ferroferric oxide and a phosphorus source compound are added into distilled water, a compound additive is added after the temperature is increased, the mixture is stirred to react, and a ferrous dihydrogen phosphate solution is obtained; the compound additive is a mixture of an iron-containing reaction additive and a reducing agent, the addition amount of the compound additive is 0.5-2 times of the molar weight of the ferroferric oxide, and the addition amount of the iron-containing reaction additive is 10-50% of the molar weight of the ferroferric oxide; adding an oxidizing agent into the ferrous dihydrogen phosphate solution, stirring, heating and reacting to obtain an iron phosphate crude product; and roasting the iron phosphate crude product at 450-750 DEG C to obtain the iron phosphate. The preparation method can improve the yield of the iron phosphate, reduce the content of impurity ions and improve the tap density of the iron phosphate, and the iron-containing reaction aid and the reducing agent are mixed to serve as the compound aid, so that the cost can be greatly reduced, the income can be improved, and the preparation method is suitable for large-scale production.

The invention discloses a polyhedral ionic compound composite ceramic, a preparation method and application thereof, and an oxonium ion exciter. The polyhedral ionic compound composite ceramic is prepared from the following raw materials in parts by weight: 35-45 parts of alpha-alumina, 12-18 parts of ferrosoferric oxide, 8-12 parts of zirconium oxide, 8-12 parts of organic-inorganic hybrid thorium polyacid salts, 8-12 parts of calcium fluoride, and 12-18 parts of anti-fluorite compounds. The polyhedral ionic compound composite ceramic of the invention can generate an ultra-low temperature plasma flow with a very high density under the activation of high-voltage static electricity of more than 10 kV. H, O2 and H2O in the air form resonance limiting ions (oxonium ions) with air water vapor in the ultra-low temperature plasma, thereby solving the problem of difficulty in obtaining oxonium ions and bringing extremely important value and significance to the decomposition of long-chain organic molecules and the combination of organic matter.

The present invention discloses a functional fiber mesh material and a preparation method based on carbon fiber melt direct writing to absorb antibiotics in water, belonging to the field of water body remediation technology. Ferroferric oxide, activated carbon and polymer powder are physically blended as direct writing raw materials, shaken and added to a feed barrel; the blend in the feed barrel is heated and melted into a molten state at a high temperature, and the air pressure generated by the air pump is used as a power source to extrude the molten mixture from the spinning nozzle; the carbon fiber is placed on a collection plate, and a micro-nano mesh fiber material is prepared on the carbon fiber using melt direct writing technology. The present invention is based on the preparation of micro-nano mesh composite materials by carbon fiber with the aid of melt direct writing technology, which has excellent mechanical properties, acid and alkali corrosion resistance, and is easy to recycle. The micro-nano mesh structure prepared on the surface of the carbon fiber has a strong specific surface area to provide a larger adsorption capacity, and provides more active sites for contacting antibiotics, thereby adsorbing and removing antibiotics in sewage.

The invention discloses modified methyl silicone resin and a preparation method thereof, and belongs to the technical field of silicone resin, nano silicon dioxide is deposited on the surface of ferroferric oxide to obtain composite microspheres, and the thermal stability of the modified methyl silicone resin is improved by using the composite microspheres wrapped by amorphous carbon generated by pyrolysis and carbonization of glucose; hydroxyl on the surface of polycaprolactone is bonded with carboxyl on the surface of the carbon-coated composite microsphere, agglomeration of the carbon-coated composite microsphere is avoided, gamma-glycidyl ether oxypropyl trimethoxy silane is used for modification treatment, the surface of the carbon-coated composite microsphere is provided with an epoxy group, and the epoxy group and a methyl silicone resin monomer are used for copolymerization modification, so that the carbon-coated composite microsphere is prepared. The polycaprolactone is decomposed into carbon dioxide in the curing process, so that the porosity of the material is improved, the crack propagation is delayed, the toughness of the material is improved, and the cracking caused by insufficient toughness when the material is used as insulating paint is avoided.

This invention discloses a microwave-absorbing and heating coating for metal cookware used in microwave ovens and its preparation method. The microwave-absorbing and heating coating is prepared from layered Mxenes powder, magnetic iron tetroxide powder or γ-iron oxide powder, tungsten carbide powder, polyvinylidene fluoride powder, aluminosilicate powder, and a high-temperature resistant glass adhesive. This invention uses the microwave-absorbing and heating coating material as a heat source, utilizing the heat generated by the absorbing material under microwave action, which can solve the problem that metal cookware cannot heat the food inside the cavity in a microwave oven.

The present invention relates to a composite stealth coating resistant to harsh environments, a preparation method and an application thereof, comprising the following steps: preparing a slurry required for preparing magnetite / carbon composite microspheres; preparing microsphere precursors; preparing fiber-magnetite / carbon microsphere composites; preparing a stealth absorbing coating containing magnetite / carbon composite microspheres; sequentially coating a mixed solution of a binder, a stealth absorbing coating and a curing agent on a substrate, then laying the fiber-magnetite / carbon microsphere composites flat on the surface of the coating, and after curing, obtaining a composite stealth coating on the surface of the substrate. Compared with the prior art, the present invention ensures high absorption efficiency while having stable stealth performance, flexible structure regulation, high temperature resistance, high humidity resistance and high corrosion resistance, and is suitable for applications in marine environment equipment.

The application discloses a kind of tough magnetic conductive hydrogel materials and preparation method and application thereof, the preparation method of the tough magnetic conductive hydrogel material is as follows: chitosan, acrylamide, crosslinking agent, thermal initiator are added to water, and uniformly mixed to obtain transparent solution;Iron oxide is added to the transparent solution, uniformly mixed in vacuum environment and after degassing to obtain reaction liquid;The reaction liquid is heated to make acrylamide occur radical polymerization and generate polyacrylamide composite hydrogel;Finally, polyacrylamide composite hydrogel is immersed in ammonium sulfate solution to obtain target product.The application adds appropriate amount of iron oxide powder which can produce hydrogen bond effect with hydrogel network and appropriate amount of ammonium sulfate solution which can occur Hofmeister effect with chitosan, so as to overcome the shortcomings that the breaking energy of magnetic hydrogel is low, and it is brittle and easy to break, and the prepared hydrogel has good mechanical properties, electrical properties and magnetic properties.

The invention discloses a reinforced concrete lightweight wallboard and a preparation method thereof, and belongs to the field of concrete. The lightweight reinforced concrete wallboard is mainly prepared from Portland cement and is mainly prepared from the following components in parts by weight: 20 to 30 parts of EPS (Expandable Polystyrene) polyphenyl granules, 70 to 110 parts of Portland cement, 100 to 120 parts of ceramsite, 50 to 70 parts of pottery sand, 7 to 12 parts of water, 0.05 to 0.1 part of foaming agent, 1 to 5 parts of fiber, 0.5 to 2 parts of retarder and 2 to 5 parts of additive. The foaming agent comprises triethyl propanolamine, hydroxypropyl methyl cellulose and sodium dodecyl benzene sulfonate, the retarder comprises natural gypsum and calcium carbonate, the additive comprises ferroferric oxide and sodium abietate, and the lightweight concrete wallboard obtained through the method is small in density, high in strength and remarkable in sound insulation and heat insulation effect and can be widely applied to the field of building materials. The reinforcing steel bars and the lightweight concrete are combined, and a bread type honeycomb structure is formed inside. And the effects of heat preservation and sound insulation are achieved through the priceless air.