75 results about "Precipitation polymerization" patented technology

The invention constructs a universal visual virus molecularly imprinted sensor modified with an anti-protein coating, the sensor uses magnetic Fe3O4 as an imprinting carrier, HBV as a template and dopamine as a functional monomer for imprinting to obtain a molecularly imprinted polymer with a polydopamine coating (PDA), and before the template is removed, the molecular imprinting polymer with the polydopamine coating (PDA) is separated from the template, so that the molecular imprinting polymer with the polydopamine coating (PDA) is obtained. The surface of the PDA layer is covered with a slightly cross-linked PMEO2MA layer through a water precipitation polymerization method, and the polymer can effectively reduce non-specific protein adsorption; and finally, exposing an imprinting cavity of the PDA layer by eluting the template molecules. On the other hand, potassium permanganate (KMnO4) is used as a signal output molecule, and when no target object exists, the strong reducibility of PDA can enable KMnO4 entering the imprinting cavity to be subjected to a color fading reaction. Based on the principle, high-specificity colorimetric visual detection on the HBV is realized. The sensor can be combined with a smart phone through naked eyes to carry out visual semi-quantitative analysis and carry out quantitative detection through ultraviolet rays, and the universality of the sensor can be confirmed through a template replacement experiment. And meanwhile, the sensor shows an excellent cost advantage. The diagnosis which is high in sensitivity, low in cost and capable of achieving rapid visualization shows huge potential in practical application, and particularly has important application value in infectious disease screening and monitoring work in areas with limited resources.

The invention relates to the field of cables, and discloses a flame-retardant impact-resistant cable and a preparation process thereof.The cable sheath layer is prepared from low-density polyethylene, nitrile rubber, ethylene-vinyl acetate copolymer, modified halloysite nanotubes and a flame-retardant additive, the preparation method comprises the following steps: carrying out acylating chlorination on 2, 4-dihydroxyphenyl)-2H-benzotriazole, reacting with 3, 5-di-tert-butyl-4-hydroxybenzylamine to prepare a modified acylating chlorination ultraviolet absorbent, and grafting the modified acylating chlorination ultraviolet absorbent with aminated halloysite nanotubes to prepare the ultraviolet absorbent. The aminated halloysite nanotube is prepared by using gamma-aminopropyl triethoxy silane to modify the aminated halloysite nanotube; the flame-retardant additive is prepared from a flame-retardant intermediate obtained by reaction of diphenyl silanediol and phosphorus oxychloride and phosphonitrilic chloride trimer through a precipitation polymerization method. The added modified halloysite nanotube and flame-retardant additive can endow the cable with excellent mechanical properties, aging resistance, flame retardance and heat resistance.

The invention relates to the field of pouring sealants, and discloses a modified epoxy resin pouring sealant and a preparation method thereof, the pouring sealant comprises epoxy resin, a modified inorganic filler, a modified additive and an auxiliary agent; the modified inorganic filler is prepared by grafting a quaternized s-triazine derivative and an inorganic filler; the quaternized s-triazine derivative is prepared through the steps that 3, 5-diaminophenylboronic acid, cyanuric chloride, 3-chloropropyltrimethoxysilane and 1, 4-butanediamine are sequentially subjected to substitution to prepare a s-triazine derivative, then the s-triazine derivative reacts with N, N-dimethyl-1, 3-diaminopropane, and bromoethane is used for quaternization treatment. The modified additive is prepared from a modified bismaleimide monomer prepared from maleic anhydride and 5 (6)-amino-1-(4-aminophenyl)-1, 3, 3-trimethylindane and 1-methyl-4-isopropyl cyclohexene through a self-stabilization precipitation polymerization method, the prepared pouring sealant is high in tensile strength, good in impact resistance and good in mechanical property, and the prepared pouring sealant has the advantages of being good in mechanical property, good in mechanical property and good in mechanical property. Meanwhile, good heat resistance, flame retardance, dielectricity and antibacterial activity are achieved.

A solvent-based plastic recycling method that removes color and produces plastic polymers substantially free of exogenous colorants. The method comprises selecting a solvent that selectively dissolves an individual polymer and has low solubility of colorants and decomposition products of the colorants. A combined precipitator and piston device is used to precipitate the polymer solution and mechanically remove the solvent from the precipitate before thermal drying. An adsorption bed is used to clean the recovered solvent as it is recycled to the process.

The invention provides a preparation method of a hydrophobic silver nanoparticle doped coating, which comprises the following specific steps: preparing silicon shell silver chloride nanoparticles (AgCl (at) SiO2NPs) by taking cetyltrimethylammonium chloride (CTAC), silver nitrate, sodium chloride and tetraethyl orthosilicate (TEOS) as raw materials through a one-pot method, and introducing carbon-carbon double bonds by 3-(methacryloyloxy) propyltrimethoxysilane (MPS) under an acidic condition. In the subsequent distillation-precipitation polymerization process, 4-chloromethyl styrene (VBC) is grafted with chloromethyl, and finally, perfluoropolyether methyl acrylate (PFPEMA) is introduced through atom transfer radical polymerization (ATRP) to form AgCl (at) SiO2-F NPs. Nanoparticles are added into polydimethylsiloxane (PDMS) to be evenly mixed, a silica gel catheter is used for pulling and curing to form the hydrophobic nanoparticle coating SR-F. The hydrophobic nanoparticle coating SR-F is mature in step, firm in film and good in hydrophobicity, and experimental results show that the coating has long-acting antibacterial ability.

The invention relates to a preparation method of a pigment dispersant and a pigment dispersion. The preparation method of the pigment dispersant comprises the following steps: (1) carrying out self-stabilization precipitation polymerization on light gasoline before etherification and maleic anhydride in an organic solvent to obtain a mixed olefin-maleic anhydride copolymer; (2) carrying out functional modification on the mixed olefin-maleic anhydride copolymer; wherein the functional modification is (i) hydrolysis modification or (ii) sulfonation modification, (i) hydrolysis modification: hydrolyzing a maleic anhydride group in the mixed olefin-maleic anhydride copolymer, and (ii) sulfonation modification: reacting the mixed olefin-maleic anhydride copolymer with a sulfonic acid compound having a hydroxyl group or an amino group. According to the preparation method of the pigment dispersant, the low-value petrochemical crude product (light gasoline before etherification) is used as the raw material, so that the utilization efficiency of the petrochemical crude product is improved, and the green and environment-friendly concept is met.

The present invention relates to hybrid polymers obtained from at least one monomer comprising at least one unsaturated ethylenic functional group by a free radical precipitation polymerization process in the presence of at least one protein. The invention also relates to the use of said hybrid polymer as a tackifier in various formulations or compositions.

The invention relates to a preparation method of hollow nanofibers. The preparation method comprises the following steps: S1, preparing an initiator emulsion: ultrasonically dispersing an initiator into an alkane solvent to prepare the initiator emulsion; s2, preparing a monomer-containing solution: ultrasonically dissolving an aromatic monomer with more than two carbon-carbon double bonds and an optional aromatic monomer with one carbon-carbon double bond in an alkane solvent to prepare the monomer-containing solution; s3, polymerization reaction: mixing the monomer-containing solution with the initiator emulsion, and performing polymerization reaction during continuous ultrasonic treatment, the polymerization reaction being room-temperature active cation precipitation polymerization; and S4, terminating the reaction: after the polymerization reaction, adding a terminating agent, and continuing ultrasonic treatment to obtain the hollow nanofiber. The preparation method of the hollow nanofiber is high in reaction speed and simple in process, raw materials are low in cost and easy to obtain, and industrial ton-level batch production can be achieved.

This invention relates to an aqueous binder for lithium-ion battery negative electrodes, its preparation method, and its application. The raw materials for the aqueous binder include unsaturated carboxylic acid monomers, unsaturated nitrile monomers, unsaturated amide monomers, acrylate monomers, and functional monomers. The functional monomers include at least one selected from hydroxyethyl acrylate, hydroxyethyl methacrylate, methoxy polyethylene glycol acrylate, allyl polyethylene glycol, and allyl polyethylene glycol monomethyl ether. The aqueous binder of this invention incorporates acrylate monomers and functional monomers, which can lower the glass transition temperature of the copolymer while maintaining high peel strength. By introducing functional monomers with long side chains, the double-layer mechanism of polyacrylic acid itself and the steric hindrance effect of the long side bonds of the functional monomers are utilized as dispersants to achieve stable dispersion of the negative electrode slurry particles. The precipitation polymerization method can significantly reduce the internal resistance of lithium-ion batteries and improve peel strength.

The invention relates to a preparation method of a polymaleic anhydride-proline / COF hollow mesoporous catalyst as well as a product and application thereof, and belongs to the technical field of preparation of functional materials. A self-stabilization precipitation polymerization method is adopted, no stabilizer or surfactant needs to be added, and the prepared microspheres are clean in surface, simple in post-treatment, free of stirring, simple in reaction system, short in reaction time and high in polymerization efficiency. The preparation method comprises the following steps: firstly, synthesizing COF serving as a template from 4, 4-bibenzaldehyde and s-triphenylamine, and performing dehydration polymerization on residual-NH2, divinyl benzene, maleic anhydride and proline to form a special hollow mesoporous catalyst which is relatively good in crystallinity, high in specific surface area, uniform in pore distribution and compact in structure arrangement, namely a polymaleic anhydride-proline / COF hollow mesoporous catalyst. Excellent stereoselectivity and yield are obtained by catalyzing direct nitro-Mannich asymmetric cascade reaction, and the preparation method is simple and high in yield.

The application relates to the technical field of polyolefins, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin, the method comprising mixing olefin monomers, a catalyst and an additive, and performing a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers, the nonpolar monomers are selected from one or more than two of ethylene, alpha-olefins and internal olefins, and the polar monomers are selected from one or more than two of enol, unsaturated carboxylic acids and unsaturated carboxylic acid esters; and the catalyst is selected from a post-transition metal complex shown in formula (I). The application can eliminate the catalyst loading process, realize olefin homogeneous catalyst polymerization self-forming, and prepare polyolefins with good particle morphology.

This invention belongs to the field of polymerization reactions and discloses a reaction system and method for the precipitation polymerization of α-olefins with maleic anhydride. The system includes a reaction circulation subsystem and an external circulation temperature control subsystem. The reaction circulation subsystem includes a reaction vessel, a reactor, a reaction circulation pump, and a mixing connection device. The reaction vessel includes a vessel body, a jacket, a stirring device, and a first non-condensable gas outlet. The reactor includes a reaction liquid chamber, an external circulation liquid chamber, and a second non-condensable gas outlet. The external circulation liquid chamber is arranged around the outside of the reaction liquid chamber and is not connected to it. The external circulation temperature control subsystem includes an external circulation buffer tank, an external circulation pump, an external circulation heater, and an external circulation cooler. This invention, through a segmented reaction system, separates the heating and cooling functions of the reaction vessel, meeting the heating and cooling requirements of the precipitation polymerization of α-olefins with maleic anhydride in different solvent systems at different reaction stages.

The application belongs to the field of water pollution control, and discloses a preparation method and application of a flexible imprint MOFs catalyst capable of being magnetically recycled. A core-shell structure flexible imprint catalyst is synthesized by adopting a precipitation polymerization method with a magnetic Fe-MOF as a base. The catalyst has multi-target adsorption characteristics, can simultaneously and quickly target capture various sulfonamide organic matters in water, realizes efficient targeted degradation of sulfonamide organic pollutants in water, has the characteristics of magnetic recovery, can be quickly separated from the solution by an external magnetic field to realize efficient recovery and reuse of the catalyst, conforms to the green environmental protection concept, and has a good engineering application prospect.

The invention relates to a method for producing a thermoplastic polyurethane powder by means of precipitation polymerisation. The method comprises i) providing a solvent mixture which contains at least one first aprotic solvent A1 having a relative permittivity εr between 2 and 20 (at 20 °C and 100 kHz) and a second aprotic polar solvent A2 from the group 1,2-propylene carbonate, gamma-butyrolactone or ethylene carbonate; ii) adding a polyol B having a molecular mass between 60 g / mol and 250 g / mol and a diisocyanate C; iii) reacting B and C in the solvent mixture A at a temperature of at most 150 °C, wherein the resulting polyurethane precipitates as a solid and forms a dispersion; iv) separating the solvent, washing the solid and drying to give the powder. The resulting powder has a molecular mass Mw of ≥ 35000 g / mol, an allophanate content of < 0.25 mol % and a proportion of > 25.0% of particles < 0.500 mm and satisfies a Mz : Mw ratio of < 4.0.

The invention provides a preparation method of a flatulence slow-rebound foam composition. The preparation method comprises the following steps: with isocyanate as a unique monomer, preparing linear polyurea microspheres in a reaction medium by using a precipitation polymerization method; adding a multifunctional amine cross-linking agent and polyether amine, and supplementing similar isocyanate, so that the surface of the polyurea microsphere is subjected to a cross-linking reaction to obtain a polyurea core-shell microsphere with a linear core and a cross-linked shell; and dissolving out the inner core of the polyurea core-shell microsphere to obtain the porous hollow polyurea microsphere. The microspheres prepared by the method are good in flatulence effect, and the flatulence slow-rebound foam composition is excellent in air permeability and mechanical property.

The present invention relates to hybrid polymers obtained by a free radical precipitation polymerization method from at least one monomer containing at least one unsaturated ethylenic functional group in the presence of at least one protein. The present invention also relates to the use of said hybrid polymers as thickeners in various formulations or compositions.

The invention relates to a precipitation polymerization method of a Fischer-Tropsch synthesis product and functionalized cross-linked copolymer microspheres prepared by the precipitation polymerization method. The precipitation polymerization method comprises the following steps: carrying out precipitation polymerization on a reaction system containing a Fischer-Tropsch synthesis product, an electron accepting monomer, a cross-linking agent, an initiator and a solvent; a cross-linking group of the cross-linking agent is a group with a carbon-carbon double bond; the Fischer-Tropsch synthesis product comprises an electron donating monomer. The precipitation polymerization method provided by the invention has the characteristics of simple process, easy product separation and low cost, and provides an effective way for high-value utilization of Fischer-Tropsch synthesis products.

A solvent-based plastic recycling method that removes color and produces plastic polymers substantially free of exogenous colorants. The method comprises selecting a solvent that selectively dissolves an individual polymer and has low solubility of colorants and decomposition products of the colorants. A combined precipitator and piston device is used to precipitate the polymer solution and mechanically remove the solvent from the precipitate before thermal drying. An adsorption bed is used to clean the recovered solvent as it is recycled to the process.

The invention relates to an extracellular vesicle enrichment material as well as preparation and application thereof. According to the enrichment material, SPP serves as a monomer, AIBN serves as an initiator, and a hydrophilic amphoteric high-molecular polymer is prepared through a precipitation polymerization reaction. The efficient capture of the extracellular vesicles is realized by utilizing the coordination effect of the prepared amphoteric high-molecular polymer and phosphatidylcholine on the surfaces of the extracellular vesicles. Meanwhile, the material is subjected to phase change centrifugation in an organic phase with a certain concentration to form a precipitate, and one-step efficient enrichment of the extracellular vesicles is realized by utilizing the characteristic. The material contains repeated amphoteric group units, so that the material has strong affinity to extracellular vesicles, and meanwhile, the strong hydrophilicity of the material can also avoid non-specific adsorption of impure proteins, so that the enrichment purity of the extracellular vesicles is remarkably improved. In addition, the material has the advantages of being easy to prepare, simple and convenient to operate, efficient in enrichment and the like, and has important significance on separation and purification and downstream analysis of extracellular vesicles in body fluid.

This invention relates to the field of polyolefin technology, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin thereof. The method includes mixing olefin monomers, a catalyst, and an auxiliary agent to carry out a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers; the nonpolar monomers are selected from one or more of ethylene, α-olefins, and internal olefins; the polar monomers are selected from one or more of enols, unsaturated carboxylic acids, and unsaturated carboxylic acid esters; the catalyst is selected from a post-transition metal complex of formula (I). This invention eliminates the need for catalyst loading in the process, achieves self-forming polymerization of olefins using homogeneous catalysts, and prepares polyolefins with good particulate morphology.

This invention relates to a polyamide 6 microsphere and its preparation method. The preparation method of the polyamide 6 microsphere includes: melting caprolactam, adding an initiator and reacting at 120-130 °C for 10-30 min; then adding a solvent consisting of a mixture of hydrocarbons and high-boiling-point ethers in a volume ratio of 1:9 to 9:1; adding an appropriate amount of dehydrating agent and an appropriate amount of activating agent; and reacting at 135-150 °C for 20-90 min to obtain polyamide 6 microspheres. This invention uses hydrocarbons and high-boiling-point ethers as a mixed solvent and employs precipitation polymerization without solvent etching to directly prepare spherical, narrowly distributed, high-purity, and controllable-size polyamide 6 microspheres. This meets the high-performance application requirements of 3D printing, bioseparation, and high-end coatings, which are unattainable by traditional methods. Furthermore, the mixed solvent used in the preparation process can be recycled and reused.

The application discloses a preparation method of a hydrophobic H-SiO2@PNIPAM hybrid microgel stabilized phase inversion type Pickering emulsion and application thereof, and relates to the technical field of nanometer material preparation and biological culture. The application prepares the surface hydrophobic H-SiO2@PNIPAM hybrid microgel particles through a precipitation polymerization method and a sol-gel reaction, then uses the hybrid microgel as an emulsifier to stabilize a W / O type Pickering emulsion, can encapsulate the obligate anaerobe bifidobacterium in the inner part of the emulsion droplets, and realizes efficient culture. The hybrid microgel prepared in the application has strong hydrophobicity, and meanwhile, the temperature sensitivity of the PNIPAM core is reserved, so that the Pickering emulsion stabilized by the hybrid microgel also has temperature sensitivity, and the emulsion can be phase-inverted only by temperature change, so that the inner phase bacteria are released, and rapid separation is realized. Compared with the conventional anaerobe culture method, the method disclosed by the application can realize efficient culture and rapid separation of the bacteria after culture, and has a good application prospect.

The invention discloses a method for quantitatively evaluating the influence degree of a comonomer on the crystallinity of PAN resin for carbon fibers, and belongs to the technical field of high polymer materials. At present, when the influence of the comonomer on the crystallinity of the PAN resin for the carbon fiber is evaluated, due to the fact that the content of the comonomer is low and the crystallization process of the PAN is interfered by various factors, related evaluation results have the problems of large errors, poor repeatability and the like. The preparation method comprises the following steps: dissolving acrylonitrile, a comonomer and an initiator in a solvent, placing the solution in a closed container, and heating in a water bath to obtain a reaction product; and after being tested by an X-ray diffraction analyzer, the crystallinity is calculated through an XRD (X-Ray Diffraction) result. According to the method, precipitation polymerization is carried out under a standing condition, so that PAN forms particles with ordered structures through self-assembly, the interference of factors such as flowing of a polymerization liquid and impurities on PAN crystallization is avoided, and the influence degree of the comonomer on the crystallinity of the PAN resin can be accurately and quantitatively evaluated.

The application relates to the technical field of polyolefins, and discloses a coordination precipitation polymerization method for olefin polymerization and a polyolefin, the method comprising mixing olefin monomers, a catalyst and an additive, and performing a polymerization reaction; the olefin monomers contain nonpolar monomers and polar monomers; the nonpolar monomers are selected from one or more than two of ethylene, alpha-olefins and internal olefins; the polar monomers are selected from one or more than two of enol, unsaturated carboxylic acids and unsaturated carboxylic acid esters; and the catalyst is selected from a single-metallocene pre-transition metal complex shown in formula (I). The application can eliminate the catalyst loading process, realize olefin homogeneous catalyst polymerization self-forming, and prepare polyolefins with good particle morphology.

The application provides a monodisperse functionalized polymer magnetic composite microsphere and belongs to the technical field of magnetic materials. The monodisperse polystyrene microsphere is prepared by using a dispersion polymerization method, a two-step swelling method is used to obtain porous crosslinked polystyrene microspheres, then the porous crosslinked polystyrene microspheres are mixed with sulfuric acid to obtain porous polystyrene microspheres containing sulfonic acid groups on the surface, then the in-situ precipitation method is used to combine with ferrous ions, in an alkaline environment, the magnetic porous polystyrene microspheres are obtained, finally in acetonitrile solvent, various functional monomers are added to obtain the monodisperse functionalized magnetic composite microspheres which have good suspension performance and fast magnetic attraction rate.

The invention discloses a preparation method of small-particle-size functionalized polymer microspheres, and belongs to the technical field of polymer preparation. The small-particle-size functionalized polymer microspheres are prepared by taking hydrophilic polyethylene glycol diacrylate or polyethylene glycol dimethacrylate as a cross-linking agent and adopting a self-stabilizing precipitation polymerization reaction. The copolymerization reaction system is composed of an electron donating monomer, an electron accepting monomer and a polyethylene glycol diacrylate or polyethylene glycol dimethacrylate hydrophilic crosslinking monomer; and after the polymerization reaction is finished, separating the narrow-distribution functionalized polymer micro-nano particles from the reaction system in a centrifugation or filtration manner. The prepared polymer microspheres are uniform in size, controllable and small in particle size, good in hydrophilicity, excellent in specific adsorption resistance and high in functional group content, and have wide application prospects in the fields of adsorption, separation, drug loading, controlled release, catalysis and the like.

The invention relates to a method for producing a thermoplastic polyurethane powder by means of precipitation polymerisation, comprising the steps of: i. providing A) a solvent; B) at least one polyol having a molar mass between 60 g / mol and 250 g / mol; C) at least one diisocyanate; D) a catalyst, wherein the catalyst comprises or consists of a titanium, zinc or zirconium transition metal complex or mixtures thereof; E) optionally a chain transfer agent E1) and / or an additive E2); ii. reacting the polyol B) with the diisocyanate C) in the solvent A) at a temperature of at most 150 °C in the presence of the catalyst D), optionally the chain transfer agent E1) and / or the additive E2), to form the thermoplastic polyurethane, wherein the thermoplastic polyurethane precipitates as a solid in the solvent A) and forms a dispersion; iii. separating the solvent A) and optionally washing the thermoplastic polyurethane with a solvent; and iv. drying the thermoplastic polyurethane to give the thermoplastic polyurethane powder; wherein the thermoplastic polyurethane powder has a mass-average molar mass Mw of ≥ 50000 g / mol; an allophanate content of ≤ 0.25 mol %, in relation to the total thermoplastic polyurethane powder; and a ratio of z-average molar mass Mz to mass-average molar mass Mw of ≤ 4.0, where the mass-average molar mass Mw, the allophanate content and the z-average molar mass Mz are each determined by the methods set out in the description.

In an aspect, a method of making a composition, comprising forming a solvent mixture comprising a polymer and a solvent; precipitating the solvent mixture with a non-solvent to form the composition comprising the filler in a fibrillated polymer matrix, wherein the composition is in the form of a particulate and at least one of the solvent and the non-solvent comprises a filler; and separating the composition from the solvent and the non-solvent to isolate the composition. In another aspect, a porous material wherein the filler particles are mechanically bonded together by the polymer and wherein the polymer is present as filaments adhering to and connecting the filler particles across interstitial spaces between the filler particles. In another aspect, a precipitated polymer solution produced by a phase inversion where the majority of the liquids can be mechanically removed.

This application discloses a microsphere containing ultrastable core-shell heterostructure nanocrystals and its preparation method, belonging to the field of perovskite luminescence. It utilizes an S-Zn complex formed by octetranilol and zinc acetate dihydrate to passivate the Pb content on the surface of CsPbBr3 nanocrystals. 2+ Active site, Zn 2+ Doping improves lattice matching and enhances the fluorescence quantum yield of nanocrystals. The CsPbBr3 crystal phase on the nanocrystal surface undergoes a phase transition to Cs4PbBr6 under the synergistic effect of octylthiol and zinc acetate dihydrate, forming an ultrastable core-shell heterostructure. Composite microspheres of S-Zn@CsPbBr3 nanocrystals supported on polymethyl methacrylate (PMMA) were synthesized. The S-Zn@CsPbBr3@PMMA microspheres were constructed by precipitation polymerization of S-Zn@CsPbBr3 nanocrystals and methyl methacrylate prepolymer in n-hexane. The physical barrier effect of the PMMA matrix enhances the stability of the S-Zn@CsPbBr3 nanocrystals.

The application belongs to the technical field of electromagnetic wave absorbing materials, and discloses a surface topological carbon micro-nano material and a preparation method and application thereof.The preparation method comprises the following steps: mixing acrylonitrile, a first carbon-carbon double bond unsaturated monomer, a first solvent and a first initiator, performing a precipitation polymerization reaction, and obtaining a first powder; mixing the first powder, a second solvent, a second carbon-carbon double bond unsaturated monomer and a second initiator, performing a seed polymerization reaction, and obtaining a carbon microsphere precursor powder; the carbon microsphere precursor powder is pre-oxidized, and then carbonized under a protective atmosphere to obtain the surface topological carbon micro-nano material.The application controls the morphology, particle size and composition by changing the type and amount of monomers, the type and proportion of solvents, and obtains the surface topological carbon micro-nano material with different compositions, morphologies and carbonization degrees after carbonization, the minimum reflection loss of which is-37.5 to-48.7 dB, and the effective absorption bandwidth is 3.8 to 6.1 GHz.