112 results about "Resin microsphere" patented technology

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 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 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 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 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 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 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.

The invention belongs to the technical field of medical materials, and particularly relates to an adsorption material for removing low-density lipoprotein as well as a preparation method and application of the adsorption material. The adsorption material comprises a carrier and a ligand immobilized on the carrier, wherein the carrier is obtained by grafting and modifying polymer microspheres through glycidyl methacrylate, and the polymer microspheres comprise at least one of polystyrene divinyl benzene resin microspheres and polymethacrylate resin microspheres; the ligand contains a group with negative electricity.

The application provides a Yangmei-type phenolic resin microsphere, a carbon sphere and a preparation method and application thereof, and belongs to the technical field of carbon materials. The Yangmei-type phenolic resin microsphere is obtained by using cheap and easily available phenol and formaldehyde as raw materials, through a step-by-step process of "prepolymerization to form an oligomer under alkaline conditions" and "in-situ solidification and growth of surface nano-protrusions under acidic conditions". The phenolic resin microsphere has a unique core-protrusion integrated three-dimensional structure, and after carbonization, the Yangmei-type carbon sphere can be directly converted, the core-protrusion composite structure is completely retained, and there is no collapse, cracking or protrusion shedding phenomenon. The preparation process of the application does not need a template agent, has low equipment requirements, is simple and easy to operate and enlarge, and has low raw material cost. The prepared Yangmei-type phenolic resin microsphere and carbon sphere have high specific surface area and excellent structural stability, and have wide application prospects in the fields of battery negative materials, supercapacitor electrodes, heterogeneous catalytic carriers and the like.

The invention discloses a silicone rubber material for nuclear power plant sealing and a preparation method thereof, and belongs to the technical field of nuclear power plant sealing, and the silicone rubber material is prepared from the following raw materials in parts by weight: 100 parts of methyl phenyl silicone rubber raw rubber, 50-60 parts of modified fumed silica, 5-15 parts of phenyl silicone resin microspheres, 3-8 parts of silane coupling agent treated nano boron nitride and 1.5-2.5 parts of bis-2, 5 vulcanizing agent. 0.5 to 1.2 parts of vinyl trimethoxy silane, 2 to 5 parts of hydroxyl fluorosilicone oil and 1 to 3 parts of nano cerium oxide; wherein the phenyl content of the phenyl silicone resin microspheres is 40-60 mol%, the particle size is 5-15 [mu] m, and the wall thickness is 1-3 [mu] m; the particle size of the nano boron nitride is 20-50nm, and the nano boron nitride is subjected to gamma-aminopropyltriethoxysilane surface treatment. According to the silicone rubber material disclosed by the invention, the radiation-resistant dose is increased to 2.5 MGy, and the tritium permeability coefficient is reduced by 78%; the compression permanent deformation rate at 250 DEG C is less than or equal to 18%; and the tensile strength retention rate after irradiation is greater than or equal to 85%.

The invention discloses a water-absorbent resin microsphere and a preparation method thereof, and belongs to the technical field of high polymer materials. The water-absorbent resin microspheres are prepared from the following raw materials in parts by weight: 20 to 60 parts of acrylic acid, 10 to 30 parts of acrylamide, 10 to 40 parts of 2-acrylamido-2-methyl-1-propanesulfonic acid, 5 to 30 parts of N-isopropylacrylamide, 1 to 10 parts of a hydrochromic compound, 0.1 to 1 part of a cross-linking agent, 0.1 to 1 part of an initiator and 5 to 40 parts of a dispersing agent. The preparation method comprises the following steps: (1) weighing the raw materials; (2) adding a dispersing agent into an oil-phase solvent to obtain an oil-phase solution; (3) mixing and dissolving the rest raw materials in a water-phase solvent to obtain a water-phase solution; and (4) adding the water-phase solution into the oil-phase solution, stirring, heating for reaction, and freeze-drying to obtain the product. The water-absorbent resin microspheres have high sensitivity, good reversibility and stability, and have wide application prospects in the fields of advanced anti-counterfeiting, intelligent sensing, information encryption, controllable release of carriers and the like.

The present application provides a suspension containing radioactive microspheres, a preparation method and application thereof. The radioactive microspheres include resin microspheres and a radionuclide loaded on the resin microspheres, the material of the resin microspheres includes at least one of polystyrene, polyethylene or polydivinylbenzene, or a crosslinked polymer thereof, the average particle size of the radioactive microspheres is 25-40 μm, and by controlling the non-spherical ratio of the radioactive microspheres within 5%, the distribution density of the microspheres in the tumor part is improved, the killing effect on the tumor is improved, and the incidence of adverse events is reduced.

The invention belongs to the technical field of ceramic microspheres, and particularly relates to porous and multi-cavity SiCO ceramic wave-absorbing microspheres and a preparation method thereof. The preparation method comprises the following steps: (1) under a stirring condition, dropwise adding a liquid cavity forming agent into a liquid ceramic precursor for primary emulsification to obtain a primary emulsion; (2) adding the primary emulsion into the continuous phase, and stirring for secondary emulsification to obtain a multiple emulsion; (3) thermally curing the multiple emulsion, mixing with a solvent, centrifugally separating, and drying to obtain hollow resin microspheres; and (4) sintering the hollow resin microspheres in a protective atmosphere to obtain the porous and multi-cavity SiCO ceramic wave-absorbing microspheres. The prepared porous and multi-cavity SiCO ceramic wave-absorbing microspheres have regular spherical morphology, dense nano-scale pores are distributed on the surface, a large number of micron-scale cavities exist in the microspheres, the pore diameter and the cavity structure are adjustable, and the wave-absorbing performance is good.

The present application relates to a kind of inverse opal SSZ-13 molecular sieve and its synthesis method and application.Firstly, 3-amino phenol, ethanol, formaldehyde solution, ammonia and other raw materials are used to synthesize phenolic resin microspheres, then carbonized by calcining at high temperature under protective atmosphere to obtain carbon spheres;Then, isopropyl alcohol aluminum or sodium metaaluminate, tetraethyl orthosilicate or fumed silica, water, ammonium chloride, N, N, N-trimethyl-1-adamantyl ammonium hydroxide or benzyl trimethyl ammonium is prepared into precursor solution, the precursor solution is mixed with carbon spheres uniformly, then aging, crystallization, high temperature calcination treatment in turn, to obtain the SSZ-13 molecular sieve with inverse opal structure;Finally, the prepared molecular sieve is mixed with ammonium nitrate solution for ammonium exchange treatment, after solid-liquid separation, high temperature calcination under protective atmosphere again, the SSZ-13 molecular sieve prepared by this method has the advantages of large specific surface area, three-dimensional ordered pore structure, etc., reactants and products can diffuse freely in the pore, and can be used for MTO catalytic reaction and has long catalytic life.

The invention belongs to the technical field of soil curing agents, and particularly relates to an anti-freeze-thaw sludge curing agent and a preparation method and application thereof. The sludge curing agent comprises the following raw materials in parts by mass: 40-60 parts of cement, 10-20 parts of an admixture, 10-20 parts of quicklime, 5-10 parts of gypsum, 5-8 parts of carboxylated porous resin, 0.5-0.8 part of a nonionic surfactant and 5-8 parts of activated carbon, and the carboxylated porous resin is of a three-dimensional network structure formed by condensation reaction of phenolated alkali lignin and dialdehyde. Meanwhile, porous resin microspheres are formed by utilizing a pore-foaming agent, and then the porous resin microspheres, chloroacetic acid and alkali are subjected to a reaction to prepare carboxylated porous resin microspheres. According to the non-ionic surface active agent disclosed by the invention, organic matters which are easy to migrate and free in the sludge are emulsified into micro-micelles, and the micro-micelles are adsorbed by the activated carbon, so that the micro-micelles are prevented from wrapping gel particles, hydration is hindered, a communicated pore network is prevented from being formed, and the freeze-thaw resistance of a sludge solidified body is improved. The inner surfaces of pores of carboxylated porous resin contain a large amount of phenolic hydroxyl groups and carboxyl groups, so that the migration activity of heavy metal ions is reduced.

The invention belongs to the technical field of ceramic lining plate preparation, and particularly relates to a wear-resistant ceramic lining plate and a preparation method thereof. The wear-resistant ceramic lining plate is prepared from the following raw materials: aluminum oxide, a sintering aid, aluminum titanate, modified urea resin microspheres, hafnium boride, tungsten disilicide and a KH-550 silane coupling agent, and the sintering aid is a mixture of niobium pentoxide, strontium oxide, lanthanum oxide and magnesium oxide. According to the wear-resistant ceramic lining plate, aluminum oxide serves as a main raw material, a mixture of niobium pentoxide, strontium oxide, lanthanum oxide and magnesium oxide serves as a sintering aid, a compound of modified urea-formaldehyde resin microspheres, hafnium boride and tungsten disilicide serves as a reinforcing and toughening phase, aluminum titanate serves as a conditioning agent, and the raw materials have a synergistic effect; and it is ensured that the prepared ceramic lining plate has good wear resistance, hardness and toughness.

The present application relates to a kind of organic silicon hybrid porous resin microspheres for liquid chromatography, the resin microspheres are polydivinyl benzene-g-methacryloyl oxy propyl trimethoxysilane porous resin microspheres, specifically, the copolymer of divinyl benzene and g-methacryloyl oxy propyl trimethoxysilane, and the particle size of microsphere is 30-40 μm.The specific surface area of original microsphere is 600-900 m 2 / g, and the specific surface area can reach 1000-1200 m 2 / g after crosslinking treatment.The resin microspheres of the present application are prepared by suspension polymerization method, which is simple and easy to scale up.The prepared original microspheres have good mechanical strength and contain a large number of reaction sites for modification, which can be modified according to different needs and suitable for different separation systems.

This invention provides a suspension containing radioactive microspheres, a method for preparing the same, and its applications. The radioactive microspheres comprise resin microspheres and a radionuclide loaded on the resin microspheres. The resin microspheres are made of at least one of polystyrene, polyethylene, or divinylbenzene, or a cross-linked polymer thereof. The average particle size of the radioactive microspheres is 25 μm to 40 μm. By controlling the non-spherical ratio of the radioactive microspheres to within 5%, the distribution density of the microspheres in the tumor region is increased, thereby enhancing the tumor-killing effect; furthermore, it can reduce the incidence of adverse events.

The invention discloses a medical radionuclide labeled microsphere, a preparation method thereof and application of the medical radionuclide labeled microsphere in synthesis and labeling of irradiation treatment drugs in various radionuclides. The medical radionuclide-labeled microspheres are solid microspheres or hollow microspheres with the radioactive specific activity of 1.85-185 MBq / mg formed by sequentially wrapping resin microspheres with the particle size of 100-200 nm or 1-100 [mu] m, an anchoring layer with the thickness of 0.1 nm and a polymer brush with the thickness of 20-100 nm from inside to outside and then adsorbing radionuclides. The radionuclide-labeled microspheres are used for synthesizing and labeling medicines, and in-vitro cytotoxicity and mouse in-vivo transplanted tumor growth inhibition experiments show that the radionuclide-labeled microspheres have better internal irradiation treatment efficiency on malignant solid tumors; the biosecurity of the microsphere, the preparation convenience of the nuclide-labeled microsphere and the nuclide labeling stability are relatively high, and the application value is relatively high.

The application relates to an iminodiacetic acid type chelating resin and a preparation method and application thereof, and the preparation method comprises the following steps: (1) in the case that the stirring speed is 200-350 r / min, two dispersants are dissolved in water, then ethylbenzene, glycidyl methacrylate, trimethylolpropane trimethacrylate, isooctane and di-t-butyl peroxide are added, the raw materials are reacted after ultrasonic mixing, centrifugal separation is carried out after the reaction is completed, the filter cake is cleaned and dried, and resin microspheres are obtained; (2) in the stirring state, the resin microspheres obtained in the step (1) are added into water, then iminodiacetic acid is added, stirring is continued, then preliminary reaction is carried out by heating, NaOH is further added, reaction is carried out by heating, after the reaction is completed, filtration, cleaning and drying are carried out, and the iminodiacetic acid type chelating resin is obtained. The chelating resin particle size can be controlled, the particle size is relatively large, the specific surface area is large, the adsorption capacity is high, and the chelating resin can be used for adsorbing lead ions in heavy salt matrix.

This invention belongs to the field of battery materials technology. It provides a lithium / sodium-ion battery anode material and its preparation method. Melamine and formaldehyde are used as polymerization monomers, and hydrochloric acid is used as a catalyst. Melamine resin microsphere samples are prepared in a mixed system of ethanol and water. A suitable amount of the sample is carbonized at a temperature of 650-1000℃ to form hard carbon powder. The treated hard carbon powder is then composited with a high-molecular organic material, heat-treated, and sieved to obtain the hard carbon anode material. The battery prepared using the hard carbon anode material of this invention has an initial reversible specific capacity of over 320 mAh / g and an initial coulombic efficiency of over 88%.

The invention belongs to the technical field of preparation of dimethyl sulfoxide, and relates to a preparation method of carbon fiber grade dimethyl sulfoxide. Industrial-grade dimethyl sulfoxide is used as a raw material, insoluble impurities in the raw material are filtered firstly, metal ion impurities and acidic impurities are removed through column chromatography, soluble impurities are removed through distillation dehydration and cooling crystallization, volatile impurities are removed through gas stripping finally, and the carbon fiber-grade dimethyl sulfoxide is prepared. Amphoteric ion exchange resin is adopted for column chromatography, organic silicon modified gamma-Fe2O3 magnetic nano particles are adopted as a core of the resin and copolymerized with styrene and p-divinylbenzene to obtain composite microspheres, acetylation and amination treatment is conducted on the surfaces of the microspheres, dithiocarbamic acid groups and quaternary ammonium groups are introduced, and the composite microspheres are prepared. The amphoteric ion exchange resin capable of adsorbing metal ions and acidic impurities is obtained, the mechanical strength of the microspheres can meet the industrial continuous production requirement, two functional groups on the surfaces of the microspheres do not interfere with each other, the impurities can be synchronously removed, and rapid dynamic adsorption is achieved.

The invention relates to the technical field of new-generation energy materials, in particular to a ZnSSe-C composite material of a hollow multi-shell structure and a preparation method and application of the ZnSSe-C composite material. The preparation method is characterized by comprising the following steps: firstly preparing phenolic resin microspheres which are consistent in size and are uniformly dispersed as a template, then carrying out water bath and gas phase sintering to obtain a ZnSSe (at) C spherical composite material which is uniformly dispersed in size, and finally, controlling the heating rate in a tubular furnace in an air atmosphere to obtain the hollow multi-shell structure (ZnSSe (at) C) composite material. The preparation method is simple in steps and low in cost, and the prepared negative electrode material has high specific capacity, excellent cycle performance and rate capability when being used for the sodium-ion battery due to reasonable regulation and control of the material size, construction of the hollow multi-shell structure and doping of the selenium element, and has a wide application prospect in the field related to energy storage.