25 results about "Resin microsphere" patented technology

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 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.

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 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 application relates to the field of adsorption resins, in particular to a carbon dioxide adsorption resin for an air purifier and a preparation method thereof. In the application, epoxy group activation is first carried out on the methyl methacrylate resin microspheres, and then small molecule polyamine is used for grafting, so that compared with traditional macromolecular amine, the distribution of amine groups is more uniform, and the adsorption performance of the system on carbon dioxide and the equilibrium rate are improved.

This application relates to the field of porous carbon material preparation and application technology, and discloses a method, equipment, and application for preparing phenolic resin-based porous carbon materials with a walnut shell structure rich in micropores. The method includes: emulsifying and polymerizing a phenolic source, an aldehyde source, a ZnCl2-containing molten salt system, and a catalyst in an aqueous phase to obtain resin microspheres encapsulated with molten salt; after curing and oxidation treatment, in-situ activation is performed using the liquid-phase template effect of the molten salt phase under a medium-temperature inert atmosphere; after washing and desalting, high-temperature secondary etching is performed using alkali, steam, or carbon dioxide to create pores. This method utilizes a synergistic strategy of in-situ molten salt doping and hierarchical etching to effectively suppress carbon skeleton shrinkage and significantly improve microporosity. The resulting material exhibits a walnut shell-like texture on the surface, with a specific surface area of ​​1800-2600 m² / g and a micropore volume fraction >90%, exhibiting excellent electrochemical performance as a silicon-carbon anode substrate for lithium-ion batteries.

This invention discloses a method for preparing low-fluorine, high-purity tantalum pentoxide, relating to the fields of hydrometallurgical processes for tantalum compounds and the preparation of high-purity oxides. The method involves leaching tantalum-containing raw materials using a fluorinated acid system and extracting them with a phosphorus-containing extractant. The tantalum-loaded organic phase is then back-extracted using a fluorine-capturing-complexation-reversal back-extraction system containing ammonium oxalate, ammonium carbonate, ammonia, disodium ethylenediaminetetraacetate, polyethylene glycol 200, and supported fluorine-capturing microspheres. This yields a low-fluorine tantalum-containing back-extraction solution. The solution is then subjected to precipitation, multi-stage washing, drying, and calcination to obtain low-fluorine, high-purity tantalum pentoxide. The supported fluorine-capturing microspheres utilize macroporous adsorption resin microspheres as a carrier, with zirconium-cerium hydroxide active components immobilized through a polydopamine adhesion layer. This allows for simultaneous capture of fluoride ions during back-extraction, reducing fluorine residue in the product, minimizing impurity introduction, and improving product purity and process stability.

The application belongs to the field of non-metallic element carbon material and electromagnetic wave absorbing material, and particularly relates to preparation of a carbon bowl with a completely impedance-matched natural capture net manufactured artificially. SiO2@SiO2 / C carbon spheres are obtained by calcining SiO2@SiO2 / phenolic resin microspheres; then, SiO2 is removed by etching with an etching solution; in the etching process, the carbon shell is subjected to the double action of gas in the shell and liquid outside the shell; when the SiO2 core is etched, the external solution cannot enter the inside of the sphere in time, so the internal pressure is reduced to form a pressure difference; when the pressure difference is greater than the strength that the carbon shell can bear, the carbon shell gradually concaves inward, and finally a carbon bowl with a completely impedance-matched natural capture net manufactured artificially is obtained. The application provides a new idea for the research of light-weight broadband electromagnetic wave absorbing carbon material, and the electromagnetic wave absorbing performance of the carbon material meets the requirements of thinness, lightness, wideband and strength.

This invention belongs to the field of ceramic liner preparation technology, specifically relating to a wear-resistant ceramic liner and its preparation method. The wear-resistant ceramic liner is composed of the following raw materials: alumina, sintering aid, aluminum titanate, modified urea-formaldehyde resin microspheres, hafnium boride, tungsten disilicide, and KH-550 silane coupling agent. The sintering aid is a mixture of niobium pentoxide, strontium oxide, lanthanum oxide, and magnesium oxide. The wear-resistant ceramic liner of this invention uses alumina as the main raw material, a mixture of niobium pentoxide, strontium oxide, lanthanum oxide, and magnesium oxide as the sintering aid, a composite of modified urea-formaldehyde resin microspheres, hafnium boride, and tungsten disilicide as the reinforcing and toughening phase, and aluminum titanate as a modifier. The synergistic effect of the raw materials ensures that the prepared ceramic liner has good wear resistance, hardness, and toughness.

The present application relates to a bovine serum albumin removal process and method thereof, belonging to the technical field of protein separation and purification, comprising solid-phase synthesis of a functionalized modified polypeptide, activation of a solid-phase carrier, and covalent coupling of the two; the polypeptide is composed of a binding domain, a flexible linker, and a bonding domain in sequence; the activated carrier is modified from polysaccharide or resin microspheres, and has maleimide groups on the surface to dock with sulfhydryl groups; in the later purification, the affinity material is filled into a chromatography column, and the material liquid is separated through the steps of neutral liquid balancing, material liquid pumping, sample loading, and alkaline cleaning and elution. The flexible linker composed of a polyethylene glycol segment or a flexible peptide segment effectively reduces the steric hindrance, so that the ligand fully extends outward and is exposed.

The present disclosure provides a method for manufacturing porous activated carbon microspheres, which at least includes the following steps. A phenolic resin colloidal solution, a surfactant and a dispersion medium are uniformly dispersed to form a mixture, in which the surfactant has at least three branched lipophilic groups. The mixture is heated to solidify to form a plurality of resin microspheres. A carbonization process and an activation process are performed to the resin microspheres to form a plurality of porous activated carbon microspheres.

The application discloses a kind of porous crosslinking benzyl alcohol resin sodium salt β-H elimination accelerant and its preparation method and application, it is related to β-H elimination accelerator technical field.The technical scheme is: S1 chloromethylated polystyrene crosslinked resin is poured into sodium carbonate saturated aqueous solution and heated to boiling, stirring reaction;S2 filter removes aqueous solution, washes sodium carbonate remaining in resin microspheres with water;S3 resin microspheres are dried, add anhydrous tetrahydrofuran and sodium hydride, after warming reaction, cool to room temperature and filter polymerization ball, respectively with methanol, tetrahydrofuran and n-hexane wash polymerization ball, polymerization ball is dried, obtain porous crosslinking benzyl alcohol resin sodium salt β-H elimination accelerant.The porous crosslinking benzyl alcohol resin sodium salt β-H elimination accelerant prepared by the application has the advantages of high metal salt content, strong alkaline, easy separation, etc., and is a kind of very industrial application prospect of auxiliary agent.

This invention belongs to the field of lithium battery materials technology, and relates to a nitrogen-doped porous carbon-based high-conductivity silicon-carbon composite anode material, its preparation method, and its application. The method includes: mixing phenol, formaldehyde, and melamine, adding an emulsifier, performing emulsion polymerization, and then centrifuging and drying to obtain phenolic resin microspheres; carbonizing the phenolic resin microspheres to obtain a nitrogen-doped porous carbon matrix; and placing the nitrogen-doped porous carbon matrix in a fluidized bed reactor for silicon deposition and carbon coating to obtain the nitrogen-doped porous carbon-based high-conductivity silicon-carbon composite anode material. This invention first uses melamine as a copolymer nitrogen source to prepare spherical nitrogen-doped phenolic resin microspheres through an emulsion polymerization-carbonization process. After carbonization, a porous carbon matrix is ​​formed, in which nitrogen exists in the form of 60% graphitic nitrogen and 30% pyridine nitrogen, effectively improving electronic conductivity. Subsequently, a fluidized bed gradient deposition technique is used to deposit silicon / carbon layers on the porous carbon surface in three stages, ultimately constructing a stable composite structure of "porous carbon-silicon core-carbon shell".

The application relates to the technical field of sodium ion battery negative electrode materials, and discloses resin-based hard carbon microspheres for sodium ion batteries and a preparation method thereof, which comprises the following steps: mixing styrene, a crosslinking agent and a catalyst to prepare an oil phase, dispersing the oil phase in a polyvinyl alcohol aqueous solution, and preparing resin microspheres through micro-suspension polymerization; and then performing air atmosphere pre-oxidation and inert atmosphere carbonization treatment to obtain a target product. Through regulation and control of a micro-suspension polymerization formula and a step-by-step heat treatment process, a dense spherical structure with rich closed pores and a suitable interlayer spacing is constructed, and the technical problems of low tap density and easy melting collapse of pyrolysis of traditional resin-based hard carbon are effectively solved. The obtained hard carbon microspheres have uniform particle size distribution, extremely high tap density and excellent powder fluidity, simultaneously exhibit high reversible specific capacity, high initial efficiency and excellent rate cycle stability, and are suitable for large-scale commercial application.

This invention belongs to the field of biotechnology and discloses a method for the continuous preparation of β-nicotinamide mononucleotide (NMN). The invention covalently immobilizes four functional enzymes—ribokinase, phosphoribosylpyrokinase, nicotinamide phosphoribosyltransferase, and polyphosphate kinase—on an alkali-activated epoxy resin microsphere carrier to prepare a multi-enzyme composite catalyst. Using D-ribose, nicotinamide, and low-polymerization-degree polyphosphate as substrates, a small amount of ATP-initiating reaction solution is used to carry out continuous catalysis in a packed bed reactor. Polyphosphate kinase enables in-situ, zero-distance ATP regeneration, highly coupling ATP regeneration with NMN synthesis, significantly improving energy utilization and cascade catalytic efficiency. This invention solves the problems of high ATP consumption, non-recoverable enzymes, difficulty in continuous production, and limited diffusion of intermediate products in traditional enzymatic methods. The process is stable, green, safe, and suitable for industrial scale-up.

This invention discloses a graft-modified amylopyridine-oxime-modified copolymer resin porous microsphere. Acrylonitrile, methyl methacrylate, and styrene are used as comonomers, divinylbenzene as a crosslinking agent, and azobisisobutyronitrile as an initiator. The copolymer resin microspheres ANMA are formed by suspension polymerization, followed by amylopyridine oxime-modification reaction with hydroxylamine hydrochloride solution to obtain amylopyridine-oxime-modified microspheres AOMA. Finally, AOMA-PEI is obtained through ethylenediamine amination, glutaraldehyde activation, and graft modification with polyethyleneimine (PEI). AOMA-PEI contains amylopyridine-C(NH2)=N-OH and aliphatic amine C-N groups. Its microstructure is a micron-sized spherical structure with a specific surface area of ​​93-99 m². 2 / g, mesopore volume data is 0.30-0.40 cm³. 3 / g; strength is 31-35 MPa, tensile stress is 55-60 MPa. Its preparation method includes the following steps: 1. Synthesis of ANMA microspheres; 2. Amine oxime modification of ANMA; 3. Grafting of polyethyleneimine. When used as a column adsorption material in molybdenum technetium generators, the adsorption capacity remains at 350-440 mg / g under irradiation conditions with an absorbed dose of 50-500 kGy.

The present application provides a porous carbon microsphere, a silicon-carbon negative electrode material, and a preparation method therefor. The preparation method for the porous carbon microsphere comprises: dissolving a solvent-based resin in a first organic solvent, then adding a skeleton-based carbon material and uniformly dispersing same to form a first oil phase solution, wherein the first organic solvent is incompatible with water; dissolving a surfactant in water as a first aqueous phase solution, the surfactant comprising both hydrophilic and hydrophobic groups; mixing the first aqueous phase solution and the first oil phase solution, and forming an oil-in-water emulsion system, wherein the volume ratio of the first aqueous phase solution to the first oil phase solution is greater than 1; removing water and the first organic solvent from the emulsion system to form resin microspheres having skeleton support inside; carbonizing the resin microspheres under oxygen-isolated conditions to form carbon microspheres having skeleton support inside; and activating the carbon microspheres to form the porous carbon microspheres.

The application discloses a kind of porous crosslinking quaternary amine base resin β-H elimination accelerator and its preparation method and application, it is related to β-H elimination accelerator technical field.The technical scheme is as follows: including the following steps: S1 chloromethylation polystyrene crosslinked resin and triethylamine are stirred in acetonitrile solvent and heated to reflux reaction;S2 filter removes acetonitrile and residual triethylamine, then washes with methanol to remove residual triethylamine and acetonitrile in resin microspheres;S3 the resin microspheres after washing are dried to remove excess methanol, then with sodium hydroxide solution room temperature reaction 3-8h, after reaction is finished, respectively with water and methanol wash resin microspheres, finally the resin microspheres after washing are dried, obtain porous crosslinking quaternary amine base resin β-H elimination accelerator.The porous crosslinking quaternary amine base resin β-H elimination accelerator prepared by the application has the advantages of high metal salt content, strong alkaline, easy separation, etc., and is a kind of very industrial application prospects of auxiliary agent.

The invention discloses a phenolic resin microsphere-based porous carbon conductive composite material and a preparation method thereof, and belongs to the technical field of conductive materials. Phenolic resin microspheres with specific molecular weight and hydroxymethyl content are used as carbon precursors, nitrogen-doped carbon nanofibers are introduced to construct a continuous conductive network, a metal-ligand self-assembled mesoporous template agent is adopted to form ordered multilevel channels, and a skeleton structure is enhanced by virtue of a boric acid ester crosslinking aid. The preparation method comprises the steps of potential regulation and control dispersion of precursor slurry, alkaline steam aging forming and gradient pyrolysis carbonization in an inert atmosphere. The method avoids the use of strong corrosive reagents, and the process is environment-friendly. The obtained composite material has high specific surface area, excellent conductivity and good mechanical strength, effectively solves the technical problems that a traditional porous carbon material is disordered in pore structure, insufficient in conductivity and weak in mechanical property and is difficult to synergistically optimize, and has wide application prospects in the fields of supercapacitor electrodes, silicon-carbon negative electrodes and the like.

This invention discloses a polyurea-functionalized macroporous adsorption resin microsphere material and its applications. Specifically, macroporous adsorption resin microspheres are used as the matrix, and terephthalic diisocyanate and tri-(2-aminoethyl)amine are used as functional monomers. Through isocyanate-amine polymerization and epoxy-amine ring-opening reaction, a polyurea-rich crosslinked network is bonded and coated onto the surface of the resin microspheres, resulting in surface polyurea-functionalized macroporous adsorption resin (MAR@PUP) microspheres. The surface of MAR@PUP microspheres is rich in urea groups, which can recognize phosphorylation sites in peptides through multiple hydrogen bonds. Based on the differences in phosphorylation degree and the regulation of enrichment conditions, highly selective enrichment of monophosphorylated peptides and polyphosphorylated peptides can be achieved, especially showing excellent enrichment performance for polyphosphorylated peptides.

This invention relates to the field of electrochemical energy storage technology, specifically to a high-capacity, long-cycle sodium-ion battery anode material and its preparation method, addressing the problems of low capacity and low cycle capacity retention when using porous carbon as a sodium-ion battery anode material. This anode material uses phenolic resin microspheres as the carbon source, constructing a radially gradient porous carbon framework with increasing interlayer spacing from the inside to the outside through stepwise gradient impregnation and carbonization of zinc chloride and zinc acetate. A segmented vacuum impregnation method is used to gradient-load Sn-Bi precursors from the inside to the outside, followed by heat treatment to generate a sodium-loving alloy phase in situ within the closed pores. Plasma treatment is then used to introduce pyridine nitrogen onto the outer surface and weaken the sodium affinity. Finally, a NATP fast-ion conductor coating is applied to the particle surface using a sol-gel method. The material exhibits a gradient nucleation characteristic of strong sodium affinity inside the pores and weak sodium affinity outside the pores, guiding sodium to deposit uniformly within the closed pores, suppressing dendrite growth and interfacial side reactions, and possessing both high capacity and long-cycle performance.

The present application relates to waste resource utilization and new material preparation technical field, specifically relates to a kind of Lan carbon wastewater derived flower-like phenolic resin microspheres and preparation method thereof, phenolic resin is pickled, and pretreated phenolic resin is obtained;The ethanol dispersion liquid of pretreated phenolic resin is stirred and mixed with melamine aqueous solution, to obtain precursor mixture;The precursor mixture is hydrothermally reacted, and aftertreatment is carried out, to obtain the Lan carbon wastewater derived flower-like phenolic resin microspheres.The present application realizes the resource utilization of high value of Lan carbon wastewater, preparation process is simple, repeatability is good, and the prepared microspheres have unique flower-like morphology, and have wide application prospect in adsorption, catalytic carrier and energy storage and other fields.