213 results about "Resin microsphere" patented technology

The invention discloses a preparation method of porous carbon, the porous carbon, a negative electrode material and a secondary battery, the preparation method of the porous carbon comprises the following steps: granulation: drying and granulating a phenolic resin microsphere suspension to obtain powder; nano carbon nanotubes are dispersed in the phenolic resin microspheres; and carbonization: sequentially carrying out secondary curing, pre-oxidation and carbonization on the powder to obtain the porous carbon. According to the preparation method, the porous carbon is prepared by adopting the nanoscale carbon nanotubes, firstly, the conductivity of the porous carbon is favorably improved due to the good conductivity of the carbon nanotubes, and meanwhile, the nanoscale carbon nanotubes are utilized, so that the carbon nanotubes can be more sufficiently dispersed, and the effect of improving the conductivity of the porous carbon by the carbon nanotubes is more favorably exerted; secondly, the tin or germanium element doped into the negative electrode material assists lithium ion deintercalation by reducing lithium ion transition energy barriers, so that the first effect is improved.

The invention provides spherical porous carbon as well as a preparation method and application thereof, and relates to the technical field of porous carbon materials. The preparation method provided by the invention comprises the following steps: carrying out spray drying on a phenolic resin solution in which lithiates and borides are dissolved to obtain resin microspheres; pre-oxidizing the resin microspheres at the temperature of 150-300 DEG C to obtain a carbon sphere precursor; carbonizing the carbon sphere precursor in an inert atmosphere at the temperature of 1000-1200 DEG C to obtain carbon microspheres; performing cyclic activation and pore forming on the carbon microspheres in an active atmosphere of 800-1000 DEG C to obtain porous microspheres; and reducing the porous microspheres in a reducing atmosphere of 400-600 DEG C to obtain the spherical porous carbon. The spherical porous carbon material with developed micropores and high specific surface area can be prepared, meanwhile, the coulombic efficiency is high, the conductivity is good, the used preparation method is simple and efficient, and large-scale industrial production is facilitated.

The invention provides a functional graded porous carbon microsphere and a preparation method and application thereof, the preparation method comprises the following steps: S1, mixing a soft template, a phenolic compound, a cross-linking agent and a basic catalyst, and reacting to obtain a thermosetting phenolic resin microsphere; s2, carrying out pre-carbonization treatment on the thermosetting phenolic resin microspheres to obtain a carbonized material; s3, performing physical activation on the carbonized material to obtain graded porous carbon microspheres; s4, performing heat treatment on the graded porous carbon microspheres to obtain functionalized graded porous carbon microspheres; the preparation method has the characteristics of simple process, environmental protection and economical efficiency, the functionalized porous carbon microspheres prepared by the method are uniform in morphology, and the pore volume, pore diameter and pore structure of the functionalized graded porous carbon microspheres can be accurately regulated and controlled, so that the functionalized graded porous carbon microspheres meeting application requirements are obtained.

The invention provides a preparation method and application of boron isotope separation resin microspheres. The preparation method comprises the following steps: (1) adding dimethyl sulfoxide into polystyrene-divinylbenzene resin microspheres to swell for 3 hours, adding concentrated sulfuric acid to treat until the sulfonation rate is 0.3-0.4 meq / g, washing with water, treating with an ammonium chloride aqueous solution, washing with water, drying in vacuum, atomizing and spraying a ferric chloride-ferrous chloride aqueous solution, evaporating in vacuum to remove part of water, and introducing ammonia-containing nitrogen flow to treat to obtain polystyrene-divinylbenzene resin microspheres; and washing with water, grinding the surface, treating with a sodium hydroxide aqueous solution and washing with water. The boron isotope separation resin microspheres are suitable for chromatographic separation of 10B and 11B in a boric acid-sodium hydroxide aqueous solution with the pH of 6-7.5, a desorption solution is pure water, the feeding rate is 0.3-0.6 m / h, and a boric acid-containing aqueous solution enriched with 10B can be obtained; the service life of the chromatographic column is more than 6 months, the adsorption separation performance is reduced by not more than 20%, and the chromatographic column has a certain application prospect.

The invention provides a preparation method and application of a polystyrene resin-based spherical carbonaceous porous material, and belongs to the technical field of new energy materials. The method comprises the following steps: firstly, pre-mixing styrene with a cross-linking agent, a pore-forming agent, an initiator and a surfactant at a first preset temperature, then continuously stirring at a first preset stirring speed at a second preset temperature for a first preset time, and carrying out organic polymerization to prepare a polystyrene-based resin microsphere emulsion; then separating and drying the emulsion to obtain polystyrene-based resin microspheres; then oxidizing for a second preset time at a third preset temperature in an air atmosphere to prepare oxidized polystyrene-based resin microspheres; and finally, oxidizing at a fourth preset temperature for a third preset time to prepare the polystyrene resin-based spherical carbonaceous porous material. The method is simple in process and easy to implement, the preparation cost is effectively reduced while the yield is increased, and the method has wide application value and popularization prospects.

The invention provides a phenolic resin-based spherical silicon-carbon composite material as well as a preparation method and application thereof, and belongs to the technical field of lithium battery materials. The preparation method comprises the following steps: preparing spherical phenolic resin by adopting a suspension polymerization method, curing to obtain phenolic resin microspheres, preparing porous carbon spheres by taking the phenolic resin microspheres as a carbon precursor in a carbonization and alkali activation manner, carrying out CVD vapor deposition on nano silicon, and carrying out carbon coating to obtain the phenolic resin-based spherical silicon-carbon composite material. The phenolic resin is utilized to form a highly cross-linked network structure after curing, the carbon spheres obtained after carbonization have good mechanical strength and rigidity, the porous structure of the porous carbon spheres provides a volume change buffering structure for nano-silicon, the lithium ion path is shortened, the spherical structure is beneficial to uniform dispersion, nano-silicon particles are prevented from gathering, and the performance of the lithium ion battery is improved. And the porous carbon spheres with high specific surface area can also improve the interface reaction activity, so that the problems of high volume expansion, low conductivity and slow ion diffusivity of silicon are solved.

The invention belongs to the field of new energy materials and devices, and particularly discloses nitrogen self-doped phenolic resin-based hard carbon microspheres and a preparation method and application thereof.The preparation method comprises the following steps that nitrogen-containing phenol monomers, aldehyde monomers and a basic catalyst are mixed according to a certain sequence, and after prepolymerization is conducted at the low temperature, the nitrogen self-doped phenolic resin-based hard carbon microspheres are obtained; carrying out high-temperature hydrothermal reaction to obtain phenolic resin microspheres; and sequentially carrying out low-temperature carbonization treatment and high-temperature carbonization treatment to obtain the nitrogen self-doped phenolic resin-based hard carbon microspheres. Compared with the existing nitrogen-doped resin hard carbon preparation method, the nitrogen-self-doped phenolic resin hard carbon has the advantages that a nitrogen source is introduced into the phenolic resin hard carbon from the source end of the resin, the production process is simplified, and uniform distribution and atomic-scale doping of the nitrogen element are realized. The material is used for sodium ion batteries, has excellent long cycle stability, good rate capability and high specific capacity, and has industrial application prospects.

The present invention discloses a medical microsphere and its preparation method and application. The medical microsphere includes phenolic resin microspheres and radioactive metal elements loaded on the phenolic resin microspheres; the average particle size of the phenolic resin microspheres is 1 to 150 μm. The medical microsphere in the present invention can not only achieve local cell killing in the blood vessels of a specific part, but also effectively avoid the occurrence of fragmentation; further, the medical microsphere has a good loading rate and an extremely low exudation loss rate, which can meet the loading and safety requirements of radioactive elements; in addition, the preparation method of the medical microsphere is simple.

The invention discloses a silane modified polyether flame-retardant adhesive and a preparation process thereof, and relates to the technical field of sealants, a phosphate plasticizer is selected as a plasticizer, a flame-retardant filler is selected from any one or two of aluminum hydroxide and magnesium hydroxide, and silane modified polyether resin is added as flame-retardant resin. All the components are compounded and mixed to obtain the modified flame-retardant adhesive, and the flame-retardant resin, the flame-retardant filler and the plasticizer have a good synergistic flame-retardant effect, so that the flame-retardant adhesive achieves a good flame-retardant effect. According to the invention, mercaptoacetic acid modified silicon resin microspheres are prepared, then the mercaptoacetic acid modified silicon resin microspheres react with lead acetate and zinc acetate by utilizing the adsorbability of sulfydryl to prepare modified silicon resin, and the silicon resin is an anti-dripping flame retardant and can form a stable and compact carbon layer structure after combustion; lead acetate and zinc acetate are beneficial to dehydrogenation and charring in the combustion process, so that the flame retardant property is further improved.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a silicon-carbon negative electrode material based on spherical-like resin porous carbon and a preparation method thereof.The method comprises the steps that resin and an emulsifier are fully reacted, solid resin microspheres are obtained after treatment, then high-temperature carbonization is conducted, potassium hydroxide activation is conducted after smashing, and the spherical-like resin porous carbon-based silicon-carbon negative electrode material is obtained; and carrying out acid washing to obtain the spheroidic porous carbon. And the silicon-carbon negative electrode material is obtained after vapor deposition, and the material is particularly suitable for a high-energy-density power battery.

The invention provides a method for separating boron isotopes by using ferroferric oxide / resin microspheres, which comprises the following steps: in a chromatographic column, taking a boric acid-monosodium borate aqueous solution with the pH value of 6-7 as an adsorption solution, and taking a sodium hydroxide aqueous solution with the pH value of 10-11 as a desorption solution to obtain a 10B-rich boric acid aqueous solution; the preparation method of the microspheres comprises the following steps: (1) adding dimethyl sulfoxide to swell polystyrene-divinylbenzene resin microspheres, adding concentrated sulfuric acid to treat until the sulfonation rate is 0.3-0.4 mmol / g, washing with water, treating with an ammonium chloride aqueous solution, washing with water, drying in vacuum, spraying with a ferric chloride-ferrous chloride aqueous solution, evaporating in vacuum to remove part of water, and introducing ammonia-containing nitrogen flow to treat to obtain polystyrene-divinylbenzene resin microspheres; and washing with water, grinding the surface, treating with a sodium hydroxide aqueous solution and washing with water. The method is simple in separation operation, easy to implement and high in efficiency, and has a certain application prospect; the chromatographic column is relatively stable in performance, reproducible and relatively long in service life.

The invention relates to the technical field of high polymer materials, in particular to self-cleaning organic silicon foam with a micro-nano structure and a super-hydrophobic surface and a preparation method of the self-cleaning organic silicon foam. The surface structure of the release film is customized through one-step molding transfer printing, and a release agent of the release film contains a super-hydrophobic modified organic silicon light diffusion agent. The light diffusant is mainly silicon dioxide or organic silicon resin microspheres modified by surface long-chain silane. The surface structure of the customized release film is an inverted pyramid-shaped micro-nano structure. The organic silicon foam obtained according to the process has the surface micro-nano structure, super-hydrophobic and self-cleaning functions, and is particularly suitable for manufacturing daily and industrial pads such as mouse pads, table mats and placemats.

The invention discloses a vapor deposition silicon carbon material and a preparation method and application thereof, and relates to the technical field of lithium ion battery negative electrode materials, and the preparation method comprises the following steps: dissolving phenolic resin in a solvent, then adding boric acid, heating and stirring until the solution is clear, pouring the obtained aqueous phase solution into an oil phase, adding an emulsion stabilizer, and uniformly stirring; a solution of a water-in-oil system is obtained; heating the obtained solution of the water-in-oil system, continuously stirring, adding a curing agent, continuously stirring, removing an oil phase on the surface, and drying to obtain a phenolic resin microsphere precursor; carrying out heat treatment in an oxidizing atmosphere, cooling, calcining in an inert atmosphere, cooling, washing and drying to obtain a carbonized precursor; and mixing and grinding the carbonized precursor and potassium hydroxide, calcining, cooling, washing, drying, and introducing silane gas for deposition to obtain the vapor deposition silicon-carbon material. The preparation process is simple, the cost is low, and the first efficiency of the prepared vapor deposition silicon carbon material is high.

The invention relates to a composite lithium battery diaphragm and a preparation method thereof, and belongs to the technical field of lithium batteries. The composite lithium battery diaphragm comprises a polymer base membrane; and the material of the coating comprises a natural clay mineral nanotube and a polyphosphazene resin microsphere. According to the composite lithium battery diaphragm disclosed by the invention, the coating comprises the natural clay mineral nanotube and the polyphosphazene resin microspheres, and the volume change rate of the coating at a high temperature is small, so that the thermal shrinkage of the composite lithium battery diaphragm is reduced; due to the synergistic flame-retardant effect of the natural clay mineral nanotubes and the polyphosphazene resin microspheres, the inflammability of the composite lithium battery diaphragm is improved, and the composite lithium battery diaphragm can be self-extinguished after being ignited; the coating formed by the natural clay mineral nanotubes and the polyphosphazene resin microspheres has abundant pore channels and pores and can absorb a large amount of electrolyte, so that the composite lithium battery diaphragm has high affinity to the electrolyte and high ionic conductivity.

The invention relates to the technical field of radiopharmaceutical preparations, in particular to yttrium [90Y] microsphere injection as well as a preparation method and application thereof. The preparation method of the yttrium [90Y] microsphere injection comprises the following steps: S1, uniformly mixing a radioactive stock solution and an yttrium sulfate solution, stirring and mixing with resin microspheres, and washing to obtain yttrium [90Y] microspheres; s2, stirring and mixing a sodium phosphate solution and the yttrium [90Y] microspheres, taking out 1 / 3 volume of clear liquid, carrying out suction filtration on the residual clear liquid, and mixing the taken clear liquid with the yttrium [90Y] microspheres to obtain mixed liquid; and S3, stirring and mixing the sodium dihydrogen phosphate solution and the mixed liquid, taking out 4 / 10 volume of clear liquid, carrying out suction filtration on the residual clear liquid, mixing the taken clear liquid with yttrium [90Y] microspheres, washing, filling and sealing, and sterilizing to obtain the yttrium [90Y] microsphere injection. The labeling rate of yttrium [90Y] in the produced yttrium [90Y] microsphere injection is high.

The invention belongs to the technical field of conductive microsphere preparation, and particularly relates to a preparation method and application of conductive microspheres with convex particles on the surfaces. The preparation method comprises the following steps: acidizing resin microspheres by using imidazole disulfate ionic liquid, and combining the acidized resin microspheres with aminated activated carbon through chemical bonds to obtain microspheres with convex particles on the surfaces; and sequentially carrying out stannous chloride sensitization, palladium chloride activation and chemical nickel plating on the microspheres with the convex particles on the surfaces to obtain the conductive microspheres with the convex particles on the surfaces. The conductive microspheres with the raised particles on the surfaces can generate more and more effective local contact points in the crimping process, so that the connection resistance is obviously reduced, and the excellent conductive performance is realized.

The present application relates to the technical field of radiopharmaceutical preparation, specifically relates to an yttrium [90Y] microsphere and preparation method therefor and use thereof. The yttrium [90Y] microsphere comprises a polystyrene sulfonic acid type resin microsphere and yttrium-90 adsorbed within the polystyrene sulfonic acid type resin microsphere. The use of polystyrene sulfonic acid type resin microsphere to adsorb yttrium-90 has significantly improved adsorption strength, significantly improved safety during preparation and use, and has a good killing effect on tumor cells.

The invention relates to an oxygen reduction catalyst and a preparation method thereof, and relates to the technical field of oxygen reduction catalysts. The preparation method comprises the following steps: 1, obtaining melamine-formaldehyde resin microspheres, dispersing the melamine-formaldehyde resin microspheres in water, adding a pyrrole solution and an iron salt aqueous solution, carrying out a stirring reaction, and carrying out centrifugal washing and drying to obtain a catalyst precursor with a core-shell structure; 2, mixing the catalyst precursor with a first pyrolyzable nitrogen-containing organic matter, and calcining in nitrogen-doped inert gas flow to obtain an oxygen reduction catalyst; the nitrogen-doped inert gas is doped with a nitrogen-containing component, and the average content of the nitrogen element in the nitrogen-doped inert gas ranges from 50 mg / L to 1500 mg / L. The preparation method of the oxygen reduction catalyst can improve the performance of the oxygen reduction catalyst.

The invention relates to the technical field of preparation and application of porous carbon materials, and discloses a preparation method, equipment and application of a phenolic resin-based carbonaceous porous material with a walnut shell structure and rich in micropores, and the method comprises the following steps: emulsifying and polymerizing a phenol source, an aldehyde source, a fused salt system containing ZnCl2 and a catalyst in a water phase to prepare resin microspheres internally wrapped with fused salt; after solidification and oxidation treatment, in-situ activation is carried out under the action of a liquid phase template of a molten salt phase in a medium-temperature inert atmosphere; and after washing and desalting, carrying out high-temperature secondary etching pore-forming through alkali, water vapor or carbon dioxide. According to the method, the in-situ fused salt doping and graded etching synergistic strategy is utilized, carbon skeleton shrinkage is effectively inhibited, and the microporosity is greatly improved. The surface of the obtained material presents walnut shell-shaped textures, the specific surface area is 1800-2600m / g, the micropore volume fraction is greater than 90%, and the material has excellent electrochemical performance as a lithium ion battery silicon-carbon negative electrode matrix.

Resin-based carbon material microspheres, a preparation method therefor, and the use thereof, belonging to the field of carbon materials. The preparation method comprises the following steps: (1) mixing an alcohol-soluble phenolic resin with ethanol and water to obtain a resin dispersion liquid, the volume fraction of ethanol in the resin dispersion liquid being 30-80%, and the concentration of the resin dispersion liquid being 0.01-0.10 g / ml; (2) freeze-drying the resin dispersion liquid to obtain resin microspheres; and (3) carbonizing the resin microspheres in a protective atmosphere to obtain the carbon material microspheres. The preparation process involves a simple route and low raw material cost and thus facilitates mass production. The prepared carbon material microspheres are at the nanoscale and have a specific surface area up to 659.06 m2 / g and a pore volume reaching 0.2787 cm3 / g, and thus can be used as an adsorption carrier, a drug delivery carrier, an energy storage carrier or a catalytic carrier, etc.

The invention belongs to the technical field of photovoltaic packaging materials, and provides a light anti-reflection packaging adhesive film and a preparation method and application thereof. The light anti-reflection packaging adhesive film is prepared from 100 parts of matrix resin, 1 to 15 parts of light anti-reflection master batch, 0.4 to 1.5 parts of cross-linking agent, 0.8 to 3.0 parts of assistant cross-linking agent and 0.3 to 1.0 part of silane coupling agent, the light anti-reflection master batch comprises 100 parts of matrix resin, 0.5-10 parts of an anti-reflection nano material and 0.5-10 parts of a surfactant; the matrix resin is at least one of EVA (ethylene vinyl acetate) resin, POE (polyolefin elastomer) resin and PVB (polyvinyl butyral) resin; the anti-reflection nanometer material is a porous nanometer material, the porosity is 20-70%, the aperture is 2-35 nm, and the anti-reflection nanometer material is selected from one or more of porous nanometer silicon dioxide, porous silicon dioxide loaded zinc oxide, zinc sulfide, zinc oxide, titanium dioxide, zirconium oxide, aluminum oxide and organic silicon resin microspheres. According to the light anti-reflection packaging adhesive film, the light transmittance and the assembly efficiency can be further improved.

The invention provides a spherical silicon-based composite material and a preparation method thereof, a negative electrode and a battery, and relates to the technical field of silicon-based composite materials, the spherical silicon-based composite material comprises phenolic resin microspheres, a conductive agent and silicon nanoparticles, the phenolic resin microspheres are doped with the conductive agent to form a matrix of the spherical silicon-based composite material, and the silicon nanoparticles are doped with the conductive agent to form the spherical silicon-based composite material. The phenolic resin microspheres are of a regular spherical structure, grooves or protrusions or the combination of the grooves and the protrusions are arranged on the outer surfaces of the phenolic resin microspheres, the conductive agent is evenly dispersed in the phenolic resin microspheres, and part of the conductive agent is dispersed on the outer surfaces of the phenolic resin microspheres. The matrix is activated to form porous carbon microspheres with discontinuous porous channels or pores, and the silicon nanoparticles are deposited in the porous channels or pores. The problems that the ion conduction rate of the spherical silicon-based composite material is reduced and the conductivity is reduced can be solved, so that the first efficiency and the cycle stability of the spherical silicon-based composite material are improved.

The invention provides a suspension containing radioactive microspheres as well as a preparation method and application of the suspension. The radioactive microsphere comprises a resin microsphere and radionuclide loaded on the resin microsphere, the material of the resin microsphere comprises at least one of polystyrene, polyethylene or polydivinylbenzene or a cross-linked polymer of the polystyrene, the polyethylene or the polydivinylbenzene, the average particle size of the radioactive microsphere is 25-40 [mu] m, and the non-spherical ratio of the radioactive microsphere is controlled within 5%. Therefore, the distribution density of the microspheres in the tumor part is improved, and the tumor killing effect is improved; in addition, the occurrence rate of adverse events can be reduced.

The invention discloses a carbon-coated ZnO / CoO composite adsorbent and a preparation method thereof, the method comprises chloromethylation modification, amination modification, ZIFs in-situ growth and preparation of the carbon-coated ZnO / CoO composite adsorbent, and the invention relates to the technical field of adsorption materials. According to the invention, styrene resin microspheres are subjected to chloromethylation to introduce active functional groups, and amination is carried out to generate amino groups (-NH), so that active sites coordinated with metal ions are provided, and in-situ growth of ZIF-8 and ZIF-67 on the surface of resin is promoted. The crystal morphology and distribution are effectively controlled by optimizing the molar ratio of the zinc salt and the cobalt salt to the ligand and selecting the solvent and the nucleating agent. And finally, after the material is subjected to high-temperature calcination, the resin and the ZIFs are subjected to synergistic pyrolysis to form a structure that the nano oxide is uniformly embedded into the porous carbon skeleton, so that the stability, the active site density and the gas diffusion efficiency of the adsorbent are remarkably improved.

The invention provides a porous resin microsphere as well as a preparation method and application thereof. The porous resin microspheres are prepared from the following raw materials: a reaction monomer, a pore-foaming agent and a dispersing agent, the reaction monomers comprise a monoalkenyl compound, a cross-linking agent, a modified monomer, a functional monomer and N-vinyl pyrrolidone. The preparation method comprises the following steps: preparing a water phase: mixing water and a dispersing agent to obtain the water phase; preparing an oil phase: mixing a monoalkenyl compound, a cross-linking agent, a modified monomer, a functional monomer, a pore-foaming agent and an initiator to obtain the oil phase; and preparing the porous resin microspheres: adding the oil phase into the water phase, carrying out polymerization reaction, and removing the pore-foaming agent after the polymerization reaction is completed, so as to obtain the porous resin microspheres. The reaction monomer of the porous resin microsphere is designed, the porous resin microsphere with a large swelling volume is prepared through the combined action of all the components, and the porous resin microsphere is suitable for being used as an oligonucleotide solid-phase synthesis carrier.

The invention relates to the technical field of adsorption materials, in particular to modified adsorption resin for a high-impurity n-heptane raw material and a purification method of the modified adsorption resin. The resin is prepared from the following raw materials: polystyrene-divinylbenzene resin microspheres, chloromethyl ether, 1, 3, 5, 7-tetra (4-chloromethylphenyl) adamantane, 2-methylimidazole and the like. During preparation, polystyrene-divinylbenzene resin microspheres are subjected to chloromethylation to introduce active sites, adamantine crosslinking to construct rigid pore channels, and imidazolyl functionalization to introduce specific adsorption sites. During purification, dynamic adsorption is performed after pretreatment of two stages of adsorption columns, mild regeneration is performed by using an ethanol-acetone mixed solution, isoparaffin, aromatic hydrocarbon and oxygen-containing compounds can be synchronously removed, high-purity n-heptane is obtained, the resin regeneration performance is excellent, and the whole process is easy to industrialize.

A composite lithium battery separator, comprising a polymer-based film and a coating that coats the polymer-based film, wherein the material of the coating comprises natural clay mineral nanotubes and polyphosphazene resin microspheres.

This invention discloses a polystyrene resin microsphere for pyridine adsorption, its preparation method, and its application, belonging to the field of drug purification technology. The resin microspheres prepared in this invention possess excellent pore structure, providing more adsorption sites while shortening the diffusion path of pyridine molecules, thus facilitating the adsorption and removal of pyridine from solution. The prepared resin microspheres also contain phenolic hydroxyl groups and sulfonic acid groups, which can generate electrostatic and hydrogen bonding interactions with pyridine. These two interactions are complementary, enabling the capture of pyridine molecules in different protonated states. Furthermore, through silanization modification, not only can the active sites of the resin microspheres be further enhanced, but the breakage or swelling of the resin microspheres during the adsorption-desorption cycle can also be prevented, thereby ensuring the pyridine removal effect. When adsorbing pyridine, the resin microspheres prepared in this invention can form a synergistic pathway of "pore trapping-group fixation," effectively removing residual pyridine from the reaction system.

The present application provides a gel catalyst for treating organic pollutants, and its preparation method and application, which belongs to the technical field of organic pollutant treatment. The preparation method provided in the present application includes the following steps: placing polyphenols, formaldehyde and an iron source in water, adding a catalyst to stir and dissolve, transferring the obtained solution to a reactor for reaction, taking the solution after the reaction, cooling and filtering in turn to obtain a filter residue, washing the filter residue to obtain iron-doped polyphenol-formaldehyde resin microspheres; mixing the iron-doped polyphenol-formaldehyde resin microspheres and nano-ferrite in a certain proportion by ball milling to obtain a composite material; placing acrylic acid, a cross-linking agent, and ammonium persulfate in water and stirring evenly, and then adding a certain amount of the composite material, standing under water bath heating conditions to obtain a hydrogel, and freeze-drying the hydrogel to obtain a gel catalyst. The present application can solve the problems of poor activity of heterogeneous catalysts and poor reproducibility of catalysts.

The invention relates to the technical field of building materials, and particularly discloses multi-scale fiber reinforced high-fluidity anti-crack flow state solidified soil and a preparation method of the multi-scale fiber reinforced high-fluidity anti-crack flow state solidified soil. Comprising the following raw materials in parts by weight: 75-85 parts of sandy soil, 10-30 parts of a cementing material, 1-3 parts of modified chopped steel fibers, 0.05-0.15 part of carbon nanotubes, 0.02-0.04 part of a silane coupling agent, 0.35-0.6 part of a rheology modifier and 15-25 parts of water. Wherein the modified chopped steel fiber is subjected to surface modification, and the surface of the modified chopped steel fiber is coated with a coating containing epoxy resin microspheres. The multi-scale fiber reinforced high-flowability anti-crack fluid state solidified soil can be used for reinforcement and repair of engineering projects such as bridges, tunnels and slope protection, and has the advantages of high strength and good crack resistance.