1584results about "Microballoon preparation" patented technology

The invention relates to the technical field of concrete materials, and discloses rapidly-reinforced high-performance sprayed concrete for an existing tunnel lining and a preparation method of the rapidly-reinforced high-performance sprayed concrete. The sprayed concrete is prepared from the following raw materials in parts by weight: 300 to 350 parts of low-calcium high belite sulphoaluminate cement, 80 to 100 parts of superfine slag powder, 3 to 8 parts of a trigger type activating agent, 5 to 15 parts of slow-release particles, 2 to 5 parts of nanogel, 800 to 900 parts of fine aggregate, 800 to 900 parts of coarse aggregate, 30 to 50 parts of copper-plated steel fiber, 0.8 to 1.2 parts of polypropylene fiber, 30 to 40 parts of a viscosity-adjusting accelerator, 10 to 20 parts of a water reducing agent and 160 to 180 parts of water. The sprayed concrete is high in compressive strength and good in durability, the double threats of chemical corrosion and chloride ion permeation / steel bar corrosion are cooperatively solved, and the requirement for rapid reinforcement of tunnels and underground engineering is met.

The invention provides a well wall heat insulation hollow microsphere and a preparation method thereof. A sealed vacuum cavity is formed in the well wall heat insulation hollow microsphere, a polymer layer is arranged on the surface of the well wall heat insulation hollow microsphere, the polymer layer is provided with cationic groups and anionic groups, and aerogel nano powder is embedded in the polymer layer. The invention also provides a preparation method of the well wall heat insulation hollow microsphere. The well wall heat insulation hollow microspheres have high compressive strength, and the heat conductivity coefficient is reduced; efficient well wall adsorption can be achieved through the synergistic effect of anion groups and cation groups, the defects that a traditional heat insulation material is prone to breaking, fast in heat conduction and ineffective in adsorption under the high-temperature and high-pressure environment of an ultra-deep well are overcome, and the material is suitable for an ultra-deep and ultra-deep oil and gas well drilling fluid system. A multistage pore heat insulation system is constructed through the zwitterionic polymer and the aerogel nano-powder, and a rough surface structure can be provided to assist the microspheres in adsorbing well wall rocks.

The invention discloses a multi-shell photo-thermal phase change microcapsule and a preparation method thereof, the multi-shell photo-thermal phase change microcapsule comprises a capsule wall and a capsule core, the capsule core is an organic phase change material, the capsule wall comprises a titanium dioxide layer, a graphene layer and a polydopamine layer, the graphene layer is located outside the titanium dioxide layer, and the polydopamine layer is located outside the graphene layer. The multi-shell photo-thermal phase change microcapsule disclosed by the invention can realize full-wave band capture, and is high in photo-thermal conversion efficiency and good in shell stability.

The invention relates to the technical field of anti-counterfeiting materials, and particularly discloses a composite color-changing agent, anti-counterfeiting color-changing ink and a preparation method of the anti-counterfeiting color-changing ink. The composite color-changing agent is a composite microsphere with a core-shell-satellite structure, the core is a temperature-sensing color-changing microcapsule and is composed of a temperature-sensing color-changing core material and a polymer wall material, the shell is a transparent polymer shell and wraps the core through in-situ polymerization, the satellite is a light-sensing color-changing material and is embedded and fixed on the shell, and the shell is a transparent polymer shell and is embedded and fixed on the shell. According to the composite color-changing agent, the light-sensitive material and the temperature-sensitive material are compositely inlaid through the polymer shell, so that the problem of poor compatibility of the light-sensitive material and the temperature-sensitive material is solved, the stability and the production efficiency are improved, and the imitation difficulty is increased.

A treatment composition that includes a treatment adjunct and a population of core / shell delivery particles, where the shell is made from an acid-treated chitosan and a cross-linking agent, where the acid-treated chitosan results from treating chitosan with a weak acid, or even a mixture of a strong acid and a weak acid. Related methods of making and using such compositions.

The invention relates to the technical field of water-stable layer materials, in particular to a microcapsule self-repairing ardealite water-stable layer material and a preparation method and application thereof.The preparation method comprises the following steps that S1, ardealite, slag powder and a modified coagulant are mixed in a mixer, and a preliminary modified mixture is obtained; s2, adding double microcapsules into the primary modified mixture to obtain a secondary modified mixture; s3, adding deionized water into the modified mixture obtained in the step S2, and stirring and mixing to obtain a modified wet mixture; and S4, injecting the modified wet mixture into a mold, vibrating to remove bubbles, standing at room temperature, and demolding and curing for 25-28 days to obtain the microcapsule self-repairing phosphogypsum water-stable layer material. Through the synergistic effect of the double microcapsules and the modified coagulant, the integrated function of rapid coagulation, self-repairing and toughness enhancement is achieved, it is guaranteed that a strength framework is rapidly formed in a high-humidity environment, meanwhile, immediate repairing can be provided for micro-damage, and the toughness and crack resistance of the material are macroscopically improved.

The invention relates to the technical field of controlled-release microcapsules, and particularly discloses a pH-responsive mold-targeted controlled-release essence microcapsule for daily chemicals and a preparation method thereof.The preparation method comprises the following steps that S1, chitosan is dissolved with an acid solution, a catalyst and a pH sensitive reagent are added under the protective atmosphere for a reaction, and a pH-responsive graft copolymerization product is obtained through separation and purification; s2, mixing the pH response graft copolymerization product, a cross-linking agent and a mould targeting reagent for reaction, and dialyzing and purifying to obtain a microcapsule wall material; and S3, emulsifying essence by using an emulsifier, and then adding a defoaming agent, the microcapsule wall material, the sodium tripolyphosphate aqueous solution and a pH regulator to prepare the pH-responsive mold-targeted controlled-release essence microcapsule for daily use. The microcapsule integrates specific recognition targeting ability and pH response release ability to mould, and can accurately release natural essence with bacteriostatic and aromatic functions at the mould breeding part of clothes, so that the dual effects of bacteriostasis and aroma retention are realized.

The invention provides a perfluoroethanone microcapsule and a preparation method thereof, and belongs to the technical field of fire extinguishing materials, the perfluoroethanone microcapsule comprises a core and a shell layer; the core comprises perfluorohexanone and fumed silica; the shell layer comprises isophorone diisocyanate, diethylenetriamine and a chlorine-containing monomer, and the isophorone diisocyanate, the diethylenetriamine and the chlorine-containing monomer are subjected to an interfacial polymerization reaction to form a polyurea-polyurethane hybrid network; the mass ratio of the shell to the core of the microcapsule is 1: (5-20); the anhydrous microcapsule core is constructed through an oil-in-oil type anhydrous interfacial polymerization system, so that the hydrolysis side reaction is fundamentally avoided, the microcapsule has higher stable encapsulation efficiency, and the reliability and long-term effectiveness of the product in the storage and use processes are ensured.

The invention discloses a self-repairing synchronous grouting material and a preparation method thereof, and belongs to the technical field of grouting materials. The self-repairing synchronous grouting material comprises a cement base material, a microbial capsule and chitosan calcium salt, the concrete comprises the following raw materials in parts by mass: 7-12 parts of Portland cement, 20-28 parts of fly ash, 40-55 parts of quartz sand, 20-30 parts of water, 2-7 parts of bentonite, 1-5 parts of microbial capsules and 1-5 parts of chitosan calcium salt. The self-repairing synchronous grouting material disclosed by the invention is combined with a microorganism self-repairing technology, and mineral substances such as calcium carbonate and the like can be generated through metabolic activity of microorganisms when the material has cracks, so that the cracks are automatically filled, and expansion of the cracks on the surface of a concrete material can be effectively prevented; the grouting material can continuously repair microcracks caused by environmental changes or construction stress in the long-term use process, and the integrity and stability of the structure are kept.

The invention belongs to the field of functional composite fabrics, and provides a mosquito-repellent thermoplastic polyurethane composite fabric and a preparation method thereof.According to the mosquito-repellent thermoplastic polyurethane composite fabric and the preparation method thereof, the design that mosquito-repellent microcapsules of a core-shell structure are dispersed in a thermoplastic polyurethane hot melt adhesive layer is adopted, a microcapsule core layer comprises mosquito-repellent active ingredients such as icaridin, deet or dimethyl phthalate, and the mosquito-repellent active ingredients are dispersed in a thermoplastic polyurethane hot melt adhesive layer; the shell layer is made of a polyurea material and is prepared through an interfacial polymerization method, high-load stable dispersion and controllable dot matrix film forming of the microcapsule in a hot melt adhesive system are achieved, the content of the microcapsule can reach 0.5-15 wt%, the particle size is controlled to be 0.1-2.0 m, the drug loading capacity reaches 10-60 wt%, the problem that the mosquito-repelling microcapsule is prone to damage and failure in the high-temperature melting mixing and hot-pressing compounding process is solved, and the mosquito-repelling microcapsule has good application prospects. The prepared composite fabric is high in mosquito repelling rate, still keeps an effective mosquito repelling function after being washed for multiple times, and has a wide application value.

The invention relates to a novel method for preparing microcapsule slurry. The microcapsule slurry is also an object of the invention. Perfuming compositions and consumer products, in particular perfumed consumer products in the form of home care or personal care products, comprising the microcapsule slurry are also part of the invention.

The invention provides a capsule and a preparation method thereof, the capsule comprises a core material and a rubber sheet wrapping the core material, the core material comprises an aqueous liquid preparation, an oily preparation and a structuring agent; the structuring agent comprises cellulose and / or a cellulose derivative, a low-molecular-weight lipid and a surfactant; the core material is paste, colloid or a solid-liquid mixture, and the core material can realize that the aqueous liquid preparation is stably dispersed and fixed in the oily preparation, so that the core material is stably wrapped by the rubber skin. The invention also discloses an aerosol generating product using the capsule.

The invention discloses a microcapsule material, a microcapsule using the microcapsule material and a preparation method of the microcapsule, and relates to the technical field of daily chemical products. The microcapsule material comprises an addition polymer formed by a ring-opening reaction of epoxy resin and bio-based polyamine, poly (beta-amino ester) formed by a Michael addition reaction of acrylate and phenyl polyamine, and at least one cationic polymer containing quaternary ammonium groups. The microcapsule material shows certain biodegradability, the biodegradation rate of the microcapsule material exceeds 20% within 28 days, and the applied microcapsule can effectively meet the friction fragrance release performance requirement required by essence wrapping, so that after the obtained essence-encapsulated microcapsule is stored in a lotion at 45 DEG C for 28 days, the fragrance release performance of the microcapsule material is not influenced by the friction fragrance release performance, and the fragrance release performance of the microcapsule material is not influenced by the friction fragrance release performance. The excellent friction aroma releasing capability and the adhesion capability on the fabric can still be maintained, and the excellent thermal stability is shown.

The present invention relates to microencapsulated preparations comprising biopesticide, bio-fungicide, and plant growth promoting agents and uses thereof, as well as to methods for controlling pests and for producing said preparations for managing insect pests. In particular, the invention relates to microencapsulated preparations comprising at least one insect-pathogenic (entomopathogenic) fungus selected from Metarhizium spp. and Beauveria bassiana, and at least one pathogenic Bacillus spp. bacterial strain, preparations and particles comprising these, their use on plant material, methods for controlling pests therewith, and processes for their production.

The invention discloses microcapsule powder for covering the oil smell of euphausia superba oil and a preparation method of the microcapsule powder, and belongs to the field of euphausia superba oil processing. The microcapsule powder is composed of 50-75% of OSA starch, 10-30% of euphausia superba oil, 3-20% of sodium alginate, 1-10% of succinic acid and 0.5-5% of calcium hydrophosphate, during preparation, the OSA starch is gelatinized and then sheared and homogenized with the euphausia superba oil to obtain a miniemulsion, the succinic acid, the sodium alginate and the calcium hydrophosphate are prepared into a mixed solution, the mixed solution is mixed with the miniemulsion in proportion, and spray drying is performed to obtain a finished product. An OSA starch-sodium alginate double-wall material system is adopted, a compact cross-linked layer is formed through pH response, peculiar smell substances such as trimethylamine can be completely masked, the astaxanthin retention rate is up to 95.14%, the embedding rate reaches 89.48%, krill oil oxidation is effectively inhibited, krill oil is converted into powder, the stability and the sensory property are improved, application of krill oil in the food field is widened, the technology is simple, and the method is suitable for industrial production. The method is suitable for industrial production.

The invention discloses a core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule, the microstructure is of a spherical structure, the core-shell structure is adopted, the core structure is hexadecane, the shell structure is a methyl methacrylate (MMA) and N, N-methylene bisacrylamide (MBA) copolymer, the emulsifier is lauryl sodium sulfate (SDS), the initiator is potassium persulfate, and the pH value of the core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule is 7-8. And the coating efficiency is 70-75%. The preparation method comprises the following steps: 1, preparing an oil phase and a water phase; and 2, polymerization reaction of the microcapsule. A phase change cement material based on a core-shell structure P (MMA-MBA) copolymer heat storage phase change microcapsule is prepared by compounding the P (MMA-MBA) copolymer heat storage phase change microcapsule and a cement matrix, and has hydrophobicity; obvious weightlessness exists in two times.

The invention discloses a micro-fluidic technology-based double-shell microcapsule fire extinguishing agent and a preparation method thereof, and belongs to the technical field of fire extinguishing agents. A low-boiling-point liquid fire extinguishing agent serves as a capsule core, a polyurethane material prepared through the microfluidic technology serves as a first layer shell, flame-retardant materials such as melamine formaldehyde resin serve as a second layer shell, the capsule core is coated with the first layer shell, the first layer shell is coated with the second layer shell, and the double-shell microcapsule fire extinguishing agent based on the microfluidic technology is obtained. Microencapsulation of the low-boiling-point liquid fire extinguishing agent can be well achieved through the micro-fluidic technology, the obtained single-shell-layer microcapsule fire extinguishing agent is complete in structure, compact in shell layer, uniform in particle size and good in dispersity, the good flame retardant effect can be achieved through introduction of the second-layer shell resin type flame retardant material, and the heat stability of the microcapsule fire extinguishing agent is improved.

The invention relates to the field of sewage treatment, in particular to a method for recycling soybean protein wastewater resources. The soybean protein wastewater recycling method provided by the invention comprises the following steps: 1) mixing soybean protein wastewater, activated carbon and quaternary ammonium salt modified chitosan, stirring, standing and precipitating to obtain a precipitate turbid solution; 2) mixing the precipitate turbid liquid with a fermentation inoculant, carrying out anaerobic acidogenic fermentation, and carrying out centrifugal separation to obtain a carbon source stock solution; 3) heating and denitrifying the carbon source stock solution, mixing with sodium alginate, dissolving, and spray-drying to prepare a sodium alginate-carbon source microcapsule; and 4) preparing a degradable porous suspended filler from polylactic acid, filling the sodium alginate-carbon source microcapsule into pores of the degradable porous suspended filler, and sealing to obtain the slow-release carbon source suspended filler. The method provided by the invention can improve the current soybean protein wastewater utilization rate, reduce resource waste, and solve the problem of final direction of the soybean protein wastewater.

This invention discloses a method for preparing a microcapsule-based photothermal self-healing anti-icing coating, belonging to the field of functional coating materials technology. The method includes: obtaining the core material and wall material composition parameters of the microcapsules, and collecting the polyacrylamide concentration and dopamine polymerization time; constructing a morphology-photothermal correlation model of the microcapsules to obtain the predicted photothermal conversion efficiency; performing multi-objective optimization on the core and wall material composition parameters with the target photothermal conversion efficiency as a constraint, and iteratively inverting to obtain the optimal microcapsule configuration; preparing primary microcapsules and composited with a dopamine photothermal modification layer on their surface to obtain a photothermal self-healing microcapsule additive; mixing the photothermal self-healing microcapsule additive with an epoxy resin-based coating at an adaptive mass ratio, coating and curing to obtain an anti-icing coating. This invention achieves accurate prediction of the photothermal conversion efficiency of microcapsules and intelligent optimization of composition parameters, obtaining an anti-icing coating with both high photothermal conversion efficiency and rapid self-healing capability.

The invention discloses a mechanical property regulation and control method of an aromatic microcapsule, and belongs to the technical field of microcapsules. The preparation process of the microcapsule comprises the following steps: self-assembling CNC and an amino-functionalized polymer ligand on an oil-water interface to form a stable Pickering emulsion. Wall materials are deposited on the surfaces of emulsion droplets in situ, the CNC interface coverage rate is regulated and controlled by adjusting parameters such as the ligand concentration and the emulsion water phase pH value, and then a series of aromatic microcapsules with different mechanical properties are prepared. In addition, the functional microcapsules can be designed in a customized manner according to different application requirements, and good application prospects are shown.

Disclosed in the present invention are an aqueous triggered controlled-release saline-alkali soil conditioner and a preparation method therefor. The aqueous triggered controlled-release saline-alkali soil conditioner comprises agent A. The agent A comprises a water-soluble polymer and controlled-release suspended particles. The controlled-release suspended particles comprise alginate / anti-reverse regulator composite particulates. The alginate / anti-reverse regulator composite particulates are obtained by sequentially subjecting an alginate to two-step gel cross-linking by means of a cationic anti-reverse regulator and a high-valent metal ion-containing cross-linking agent. In the present invention, the alginate used as a main material is subjected to charged regulator-based high-speed dispersion for primary gelation and high-valent metal-based secondary gelation, thereby preparing a micron-nano powder and suspension, and incorporating a solvable organic polymer material, the functions of graded release and intelligent regulation of a product are achieved. The incorporation of an organic acid and a phosphoric acid material can not only prevent a micro-irrigation device from scaling but can also achieve triggered controlled-release of the material on demand and in a timely manner, thereby achieving the effects of multi-particle-size dispersion and precise release of the product in soil.

The present application relates to the technical field of microsphere preparation, and particularly relates to a microsphere-based electrospray device, which comprises a nozzle, a conductive piece and a power supply, the nozzle has a solution channel, the solution channel has an inlet and an outlet, the conductive piece is arranged at a position adjacent to the outlet, the power supply comprises a first output end and a second output end, the first output end is connected with the outlet to provide a first electric field, the second output end is connected with the conductive piece to provide a second electric field, and the direction of the first electric field is arranged orthogonally to the direction of the second electric field, the microsphere-based electrospray device can improve the uniformity of the prepared microspheres.

The invention relates to the technical field of deodorants, and discloses a preparation method and application of an onion extract high-efficiency low-temperature concentrated deodorant, and the preparation method comprises the following steps: S1, dicing onions, soaking in a color protection solution, and draining for later use; s2, putting the diced onions into a supercritical extraction kettle, and extracting by taking ethanol as an entrainer; s3, a mixed system in the extraction kettle is sequentially guided into a first-stage separation kettle and a second-stage separation kettle through a throttling valve; s4, filtering the onion extract crude product through a bifunctional biomimetic membrane, and performing nanofiltration through a nanofiltration system; s5, concentrating the nanofiltration membrane trapped fluid in vacuum low-temperature concentration equipment to obtain an onion extract concentrated solution; s6, preparing microcapsule powder from the onion extract concentrated solution, a solvent, an emulsifier, deionized water and modified beta-cyclodextrin; mixing the microcapsule powder with menthol to prepare a solid deodorant; or compounding with ethanol to prepare liquid spray.

The invention discloses aerogel thermal-insulation waterproof mortar and a preparation method thereof. The mortar is prepared from cement, hydrophobic aerogel, interface modified asphalt rubber powder, a composite phase change heat conduction material, blast furnace slag micro powder, silica fume, nano montmorillonite, titanium dioxide aerogel powder, expanded vermiculite, shape memory polymer emulsion, chitosan, charcoal powder, carbon fibers, basalt fibers and the like. The preparation method comprises the following steps: carrying out plasma treatment and modification with an organosilicon waterproofing agent to obtain hydrophobic aerogel; carrying out interface modification on the asphalt rubber powder by adopting a titanate coupling agent; a phase change microcapsule-carbon nanotube heat conduction network is constructed through ball milling compounding; a basic framework is formed by adopting a graded mixing process, and then functional components are introduced; and finally, realizing cross-linking curing of the shape memory polymer and the chitosan through ultrasonic assistance and programmed temperature control. The mortar prepared by the invention realizes integration of multiple functions, and effectively solves the technical problems of single performance and poor durability of a traditional thermal insulation material.

The invention relates to the technical field of new energy automobile power battery thermal management, in particular to a hydrated salt phase change microcapsule for a power battery and a preparation method of the hydrated salt phase change microcapsule. According to the specific technical scheme, hydrated salt serves as a core material, methyl methacrylate serves as a shell material monomer, the monomers are polymerized on the surfaces of hydrated salt liquid drops to form a polymethyl methacrylate shell layer through an interfacial polymerization method, effective packaging of a phase change material (hydrated salt) is achieved, and the microcapsule with high phase change latent heat, low leakage rate and long cycle life is obtained. In addition, other doped auxiliary materials are deposited on an oil-water interface to improve the heat conductivity of the microcapsule. And mixing the microcapsules with heat-conducting oil to prepare suspension liquid, and driving the suspension liquid to circularly flow between the power battery packs by a peristaltic pump. According to the invention, microcapsules and liquid cooling heat dissipation are combined to provide a new thought and practical and effective temperature control and heat dissipation effects for a heat management scheme of the power battery pack.

The invention discloses a fire extinguishing microcapsule with an EVA ultraviolet crosslinking barrier material as a wall material and a preparation process of the fire extinguishing microcapsule. According to the fire extinguishing microcapsule with the EVA ultraviolet crosslinking barrier material as the wall material, the whole fire extinguishing microcapsule is spherical or sphere-like, a composite material of EVA and graphene is used as the wall material, a core material is wrapped in the wall material, the thickness of the wall material is 10-50 microns, and the diameter of the fire extinguishing microcapsule is 300-500 microns. The excellent gas barrier property of the EVA and graphene composite wall material is utilized, volatilization of perfluorohexanone is effectively blocked, the storage stability of the fire extinguishing microcapsule is improved, the service life of the fire extinguishing microcapsule is prolonged, and the effective content of a fire extinguishing agent during fire extinguishing is guaranteed.

The utility model relates to an airflow coating device for mixing powder and liquid, which comprises a mixing tank, a powder conveyor and a nozzle assembly, the powder conveyor and the nozzle assembly are respectively communicated with two ends of the mixing tank, and the powder conveyor is used for conveying powder to the mixing tank; the nozzle assembly comprises a mounting plate, an impingement flow nozzle and a two-phase flow nozzle, the mounting plate is mounted at one end of the mixing tank, the impingement flow nozzle and the two-phase flow nozzle are both mounted on the mounting plate, the impingement flow nozzle is used for inputting the heated air into the mixing tank, and the two-phase flow nozzle is used for spraying the liquid and the heated air into the mixing tank. According to the airflow coating device, powder is conveyed through the powder conveyor, and hot air is input through the impact flow nozzle, so that the powder in the mixing tank fully flows, a mixing blind area is avoided, and the air in the mixing tank can be heated; and the liquid and the heated air are sprayed into the mixing tank through the two-phase flow nozzle, and the liquid is heated and atomized, so that the powder and the liquid are uniformly mixed and coated, and the mixing and coating efficiency is improved.

The invention relates to core-shell structure ceramic powder as well as a preparation method and a preparation system thereof. According to the preparation method, a SiO2 core-containing suspension system is formed under stirring and heating conditions. And dropwise adding a pH regulator into the reaction cavity, guiding a reaction product of the ytterbium source solution and the silicon source solution to deposit and grow on the surface of the SiO2 core to form a core-shell structure precursor, and treating the core-shell structure precursor to obtain the core-shell structure ceramic powder comprising SiO2 (at) Yb2Si2O7. The material of the core of the core-shell structure ceramic powder is SiO2, the material of the shell is Yb2Si2O7, and the SiO2 core is used as a built-in silicon source library, so that the in-situ self-compensation function of the material in a high-temperature environment is realized, the stability of Yb2Si2O7 is ensured, and the problem of irreversible deoxidization decomposition of a Yb2Si2O7 phase can be avoided when the ceramic powder serves in an extreme environment with high temperature, high pressure and high water oxygen partial pressure for a long time.

The invention provides a core-shell microsphere for feed detoxification and a preparation method and application thereof.The core-shell microsphere comprises a sclerotium layer, a magnetic shell layer and a catalytic layer from inside to outside, and the sclerotium layer is composed of bacillus licheniformis and lactobacillus rhamnosus composite flora and a chitosan-sodium tripolyphosphate semipermeable membrane wrapping thalli; the magnetic shell layer is a Fe3O4 nano-particle coating, and the catalytic layer is a porous Mn-Ce-O shell. The microspheres have the double functions of biodegradation and chemical catalysis, the internal flora can degrade various toxins, the external catalytic layer efficiently decomposes stubborn toxins, the magnetic layer realizes rapid magnetic separation and recovery, and the microspheres are suitable for removing mycotoxins from feed raw materials such as corn and soybean meal.

The invention provides a microcapsule type self-early-warning and self-repairing epoxy coating as well as a preparation method and application thereof, and belongs to the technical field of anticorrosive coatings. The method comprises the following steps: mixing urea, resorcinol, ammonium chloride and a polyethylene grafted maleic anhydride aqueous solution, and adjusting the pH value of the mixed solution to obtain a water phase; mixing the PU prepolymer, DCF, TO and ethyl phenylacetate to obtain an oil phase; the water phase and the oil phase are mixed, a formaldehyde solution is added into the mixed solution for a reaction, and microcapsules are obtained; and adding the microcapsule into the epoxy coating to obtain the microcapsule type self-early-warning and self-repairing epoxy coating. According to the microcapsule, PU / UF serves as a shell of DCF and TO, DCF serves as an early warning agent, and TO serves as a repairing agent; the DT coated PU / UF microcapsule has good dispersibility in the coating, when the coating is damaged, the microcapsule is broken to release DCF and TO, the self-early warning and self-repairing performance of the coating is achieved, and metal corrosion is delayed.