42 results about "Divinylbenzene" patented technology

A macroporous cation exchange resin and its preparation and application method are disclosed. The method involves dispersing polystyrene-divinylbenzene microspheres in dichloroethane to obtain a microsphere suspension. A sulfonating agent, a mixture of fuming sulfuric acid and chlorosulfonic acid, is then slowly added dropwise under cooling and stirring conditions. After the addition is complete, heating is initiated to trigger a polysulfonation reaction. Once the reaction is complete, the reaction mixture is slowly poured into ice water and continuously stirred and diluted until the solution pH reaches 2.5. The solution is then filtered, washed, and dried to obtain a solid resin. This invention simultaneously introduces a matched number of sulfonic acid groups and sulfone groups onto the polystyrene-divinylbenzene backbone. Utilizing the electron-withdrawing effect of the sulfone groups and the rigid framework they form, the stability of the C-H and C-S bonds in the resin is enhanced. This solves the problems of resin structure damage, rapid decline in separation performance, and significantly shortened service life associated with existing cation exchange resins used in treating chromium plating aging solutions.

This invention relates to the field of filter material production technology, specifically to a novel filter material and its preparation process, comprising the following steps: drying and swelling styrene-divinylbenzene copolymer spheres, then adding them to a sulfonation tank; adding concentrated sulfuric acid to the sulfonation tank, starting a first motor to drive a stirring blade for stirring, and heating to carry out the sulfonation reaction; initially, the stirring blade rotates counterclockwise; at the end of the reaction, a second motor is started to drive a lead screw to rotate, causing the moving parts and stirring blades to move to the bottom of the rotating shaft, while simultaneously the gear rotates under the action of the gear plate, causing the stirring blades to rotate 180°, and then rotate clockwise; after sulfonation, a strongly acidic cation exchange resin is obtained. This invention, by setting a driving structure to change the position of the stirring blades according to different reaction stages, and simultaneously changing the tilt angle of the stirring blades, avoids the styrene-divinylbenzene copolymer spheres floating on the surface of concentrated sulfuric acid or accumulating at the bottom of the sulfonation tank, thus preventing a decrease in yield.

The application discloses a bisoxazoline pyridine functionalized porous organic polymer and preparation and application thereof; firstly, a styryl functionalized PyBox monomer (VPyBox) is designed and synthesized, and VPyBox, styrene and divinylbenzene are subjected to free radical polymerization under initiation of azobisisobutyronitrile in a certain proportion to obtain a series of porous organic polymers (POP-PyBox); the POP-PyBox can be used as a solid N , N , N tridentate ligand for Co-catalyzed hydrosilylation of arylalkynes with diphenylsilane; the heterogeneous catalyst system developed by the application has a catalytic activity comparable to that of a homogeneous catalyst reported in the literature, and the catalyst is easy to separate and recover; the recovered catalyst can be recycled for more than 6 times, which can not only greatly reduce the preparation cost of vinylsilane, but also simplify the post-treatment process and reduce the three wastes, and has a good practical application prospect.

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 application relates to the field of polymer materials, specifically disclosing a resin for removing nitrate nitrogen from high-concentration sulfate solutions and its preparation method. The preparation method includes the following steps: S1, dispersing an oil-phase solution containing styrene, divinylbenzene, a porogen, and an initiator in an aqueous solution, polymerizing, and then washing with a solvent to obtain porous polymer spheres; S2, subjecting the obtained porous polymer spheres to chloromethyl ether for chloromethylation treatment to obtain a pre-modified resin; S3, subjecting the pre-modified resin to an amination reaction with an amination reagent to obtain a nitrate-removed resin; the nitrate-removed resin has a pore size of 2-10 nm accounting for 50-90%; this application also discloses the nitrate-removed resin prepared by the above preparation method. This application has the characteristic of achieving the removal of nitrate nitrogen from high-concentration sulfate wastewater.

This invention provides a solid acid catalyst comprising a divinylbiphenyl polymer as a backbone and a sulfonate group as an active center; wherein the divinylbiphenyl polymer comprises substituted or unsubstituted divinylbiphenyl monomer structural units and optionally substituted or unsubstituted divinylbenzene monomer structural units; in both the substituted or unsubstituted divinylbiphenyl monomer structural units and the substituted or unsubstituted divinylbenzene monomer structural units, the substituents are each independently C1-C5 alkyl groups. This invention selects suitable polymeric monomers and polymerizes them to obtain a polymer backbone with a stable backbone structure and a large specific surface area; after sulfonation, the backbone structure is maintained, and the resulting catalyst has a stable acid active center.

To provide a porous resin bead for suppressing a rise in back pressure in a reaction vessel and stably producing a nucleic acid without liquid feeding failure in a process of synthesizing a nucleic acid. A porous resin bead characterized by consisting essentially of a styrene-hydroxystyrene-divinylbenzene-phenyl methylene malononitrile copolymer.

This invention relates to a collagen-moisturizing soft hydrophilic contact lens, belonging to the field of contact lens technology. The collagen-moisturizing soft hydrophilic contact lens of this invention comprises the following components: hydroxyethyl methacrylate, N-vinylpyrrolidone, N,N-dimethylacrylamide, methyl acrylate, collagen, polyethylene glycol 400, polyvinylpyrrolidone K90, azobisisobutyronitrile, azodimethylvaleronitrile, benzoyl peroxide, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, and divinylbenzene. This invention solves the problems of rapid decay of moisturizing effect, poor biocompatibility, and low long-term wearing comfort of existing contact lenses through the synergistic effect of a complex hydrophilic monomer system, collagen functional components, a gradient complex initiation system, and a multi-dimensional complex cross-linking system.

The present application relates to a kind of methods for deep oil removal of nickel sulfate solution resin, comprising the following steps: S1 oil removal resin pretreatment: select modified polystyrene-divinylbenzene macroporous adsorption resin as oil removal resin, and sequentially carry out acid dipping, deionized water washing, obtain pretreatment oil removal resin;S2 nickel sulfate solution pretreatment: the nickel sulfate solution to be treated is filtered by precision filter;S3 resin column deep oil removal: the obtained filtrate is imported into the fixed bed resin column loaded with pretreatment oil removal resin and is adsorbed;S4 hot water regeneration of oil removal resin: 80~90 ℃ deionized water is used as regenerant to reverse flush saturated resin column, and the oil-containing hot water generated during regeneration is collected as regeneration waste liquid;After regeneration, the resin column is washed with 30~40 ℃ deionized water until the adsorption capacity is restored;S5 regeneration waste liquid treatment: regeneration waste liquid is separated by oil and water, and the water phase is recycled after cooling. The present application not only ensures the depth of oil removal, but also realizes the green process and low-cost operation.

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.

This invention belongs to the field of carbon fiber composite technology, specifically relating to a method for preparing silicon carbide fibers based on modified methylsilane. The method includes: low-temperature copolymerization of polymethylsilane, divinylbenzene, and phenyltrichlorosilane under a platinum-based catalyst to obtain a crosslinked modified precursor; melt spinning the precursor to obtain a precursor fiber; subjecting the precursor fiber to gradient-temperature ammonolysis in a mixed atmosphere of ammonia and inert gas, achieving curing through a dual mechanism of surface chemical ammonolysis and internal thermal crosslinking; and heating the cured fiber in an inert atmosphere to 1200°C, then switching to a nitrogen-containing atmosphere, and continuing to heat to 1200–1600°C for high-temperature crystallization sintering. This invention avoids the high-temperature performance degradation problem caused by the introduction of oxygen elements in traditional air crosslinking, while simultaneously generating a silicon nitride protective layer during high-temperature pyrolysis, improving the fiber's thermal shock resistance, oxidation resistance, and high-temperature mechanical stability.

The present application relates to the technical field of battery binders, in particular to a water-based binder and a preparation method therefor, and a carbon-coated aluminum foil. The water-based binder comprises a water-soluble monomer, an oil-soluble monomer, an amphiphilic monomer, a functional monomer, an initiator and a neutralizing agent, wherein the amphiphilic monomer comprises at least one of sodium vinylsulfonate, sodium styrene sulfonate, 2-acrylamido-2-methylpropanesulfonic acid, and N-vinylpyrrolidone; and the functional monomer comprises at least one of divinylbenzene, pyrrole, phenylacetylene, and 3,4-ethylenedioxythiophene. The water-based binder of the present application is formulated by compounding the water-soluble monomer, the oil-soluble monomer, the amphiphilic monomer and the functional monomer in proportion, thereby simultaneously improving the electrical conductivity of the binder, the wettability toward conductive carbon materials and aluminum foils, the adhesion to aluminum foils, etc.; and the water-based binder makes a battery prepared therefrom exhibit a good cycling stability, and is conducive to prolonging the service life of the battery.

This invention discloses a method for determining the encapsulation efficiency of amphotericin B liposomes for injection, comprising the following steps: separating the amphotericin B liposome solution for injection using solid-phase extraction adsorption to obtain an encapsulated drug solution and a free drug solution; and determining the drug mass concentration C in the encapsulated drug solution using HPLC. 包封 Drug mass concentration C in free drug solution 游离 And the total drug concentration C in the amphotericin B liposome solution before separation 总 The encapsulation efficiency and recovery rate of amphotericin B liposomes were calculated. This invention utilizes a macroporous copolymer of divinylbenzene and N-vinylpyrrolidone as the adsorbent in a solid-phase extraction adsorption method. Its macroporous structure provides ample adsorption sites while avoiding physical compression and damage to the liposome vesicles. This method achieves the separation of free amphotericin B liposomes from the encapsulated drug, exhibiting good reproducibility, high accuracy, simple operation, and high recovery rate.

Polymer derived ceramic (PDC) materials, compositions and methods of making high capacity, long cycle, long life battery anodes to improve the performance of batteries of all types, including but not limited to coin cell batteries, electric vehicle (EV) batteries, hybrid electric vehicle (HEV) batteries, plug-in hybrid electric vehicle (PHEV) batteries, battery electric vehicle (BEV) batteries, lithium cobalt (LCO) batteries, lithium iron (LFP) batteries; and lithium-ion (Li) batteries, and lead acid batteries. Silicon is incorporated in the PDC material at a molecular level when reacting a polymer derived ceramic precursor and a silicon hydride constituent or a silicon alkoxide constituent to form a PDC composition useful as a powdered battery anode material. A predetermined amount of divinylbenzene is added as a crosslinker and a modifier to increase free carbon content. The resulting battery anode materials increase the specific capacity of a battery measured in milliampere-hours per gram (mAh / g) and increase the life cycle of a battery while minimizing distortion and stress of the anode structure.

The application discloses an ultrahigh-temperature large-temperature-difference retarding agent for oil well cement and a preparation method thereof. The ultrahigh-temperature large-temperature-difference retarding agent for oil well cement is obtained through copolymerization reaction of water as a solvent, azobisdimethylaminoformamide hydrochloride as an initiator and monomers of vinyl phosphonic acid, diethyl vinyl phosphonate, divinylbenzene, triphenyl ethenyl phenol polyoxyethylene ether and N-vinyl pyrrolidone. The ultrahigh-temperature large-temperature-difference retarding agent for oil well cement is a polymer made of monomers with rigid groups, the polymer does not decompose under ultrahigh-temperature conditions and still maintains original retarding performance, the thickening time is convenient to adjust, and the retarding agent dosage is not increased, so the strength of the top cement stone is also developed relatively fast, and over-retarding is avoided.

The present application relates to the field of catalyst, discloses a heterogeneous catalyst and its preparation method and application, and a method for preparing adiponitrile, the method comprises the following steps: (1) in the presence of polyvinyl alcohol and initiator, styrene containing amino is copolymerized with divinylbenzene to obtain a carrier; (2) in the presence of a basic environment and a solvent, the carrier is mixed with chlorin metal complex to obtain a heterogeneous catalyst; the chlorin metal complex is obtained by the reaction of chlorin and metal salt. The heterogeneous catalyst prepared by the method of the present application has high catalytic activity when used in the preparation of adiponitrile by ammoximation method, can improve the conversion rate of six-membered ring compounds and the selectivity of adiponitrile, the catalyst is easy to separate and can be reused when used in the synthesis of adiponitrile by ammoximation method.

This invention relates to the field of polypropylene film preparation technology, specifically to a high-opacity pearlescent biaxially oriented polypropylene film and its preparation method. The method uses a surface resin as the outer layer and pearlescent core granules as the core layer, and obtains the film through three-layer co-extrusion, longitudinal stretching, transverse stretching, heat setting, and springback. The pearlescent core granules first undergo targeted modification of polypropylene through reactive extrusion, sequentially introducing a first auxiliary agent, 4-methylstyrene and 4-n-octylstyrene, divinylbenzene, and a second auxiliary agent, and finally are blended and granulated with pearlescent filler. This invention can improve the micropore uniformity and pore wall stability during the transverse high-ratio stretching stage, improve whiteness, haze, and opacity with a moderate amount of pearlescent filler, and maintain good transverse tensile strength, tear resistance, and processing stability.

This invention relates to the field of crosslinking agent preparation technology for rubber, specifically to a crosslinking agent, its preparation method, and its application in rubber preparation. The crosslinking agent of this invention is prepared through multi-level structural design and functional modification: first, a porous support is synthesized using a template method, then modified with vinylsilane alkenylation, loaded with a divinylbenzene crosslinking agent, and then crosslinked using Fe... 3+ The crosslinking agent utilizes tannic acid coordination to form an inner encapsulation layer, undergoes surface functionalization modification with 1,9-decadiene, and is finally physically coated with low-melting-point paraffin wax on the outer layer. This crosslinking agent exhibits unique "dual-threshold gated" release characteristics: the outer paraffin layer provides physical protection at mixing temperatures, while the inner coordination network can be controllably dissociated at vulcanization temperatures, enabling the on-demand release of the crosslinking active components. Its application in rubber preparation significantly improves the uniformity of the crosslinking network, increases crosslinking efficiency, and solves problems such as premature consumption and uneven distribution of traditional crosslinking agents.

This invention relates to the field of polymer functional materials and water treatment technology, and discloses a preparation process of a bifunctional chelating resin of a metallo-oxime-aminophosphate group, comprising the following steps: S1. Swelling treatment: Styrene-divinylbenzene (St-DVB) copolymer white spheres are used as the matrix. Aminophosphate groups and metallo-oxime groups are simultaneously grafted onto the resin backbone to form a unique bidentate chelating structure. The aminophosphate groups are highly acid-resistant and can preferentially act on heavy metal complexes in acidic water environments, weakening the coordination bond between the complexing agent and copper ions. The metallo-oxime groups are rich in nitrogen and oxygen coordinating atoms, which can quickly capture dissociated copper ions. The two groups form a chemical synergistic effect, which is not a simple superposition of adsorption performance. X-ray photoelectron spectroscopy characterization proves that the nitrogen and oxygen atoms of both functional groups can participate in the coordination of copper ions to form a stable chelating ring, breaking the thermodynamic equilibrium of strongly complexed heavy metals and avoiding the problem of traditional resins being unable to break the complex.

This invention provides a filter membrane and its preparation method. The preparation method includes the following steps: placing a porous filter membrane substrate in an environment containing plasma and a precursor, and performing plasma treatment to obtain the filter membrane; wherein the precursor includes at least one selected from hexamethyldisiloxane, perfluorooctyltriethoxysilane, pentane, ethylene, toluene, perfluorohexane, styrene, divinylbenzene, hexamethyldisiloxane, tetramethylsilane, tetraethoxysilane, tetrafluoroethylene, and hexafluoropropylene. The filter membrane obtained by this preparation method can significantly reduce the swelling rate and simultaneously increase the permeation flux in organic solvents, achieving precise molecular weight cutoff.

This invention belongs to the field of divinylbenzene preparation and storage technology, specifically relating to a method for storing divinylbenzene to prevent self-polymerization. The method includes the following steps: S1, adding divinylbenzene into a storage tank; wherein, a cooling coil is provided on the outer wall of the storage tank, and a gap exists between the outer wall of the cooling coil and the outer wall of the storage tank. Therefore, storing divinylbenzene using a storage method with a gap between the outer wall of the cooling coil and the outer wall of the storage tank has the effect of extending the storage time of divinylbenzene and can slow down the severe self-polymerization phenomenon of divinylbenzene in the storage tank.

The present application belongs to the technical field of resin catalyst preparation, and discloses a columnar resin catalyst and a preparation method thereof. The columnar resin catalyst is prepared by suspension copolymerization of styrene and divinylbenzene in the presence of a pore former and a dispersant and a co-dispersant, extraction, drying, screening to obtain copolymer white balls, sulfonation and washing to obtain a cation exchange resin, and crushing the cation exchange resin and adding a binder to prepare the columnar resin catalyst by extrusion secondary molding. The catalyst prepared by the method has high conversion rate and better selectivity and is used for hydration and etherification reactions.

The application belongs to the technical field of CO2 flooding, and discloses a method for testing low-permeability sandstone core saturation for CO2 flooding, which comprises the following steps: selecting a rock sample; treating the rock sample; measuring the effective porosity and density of the rock sample; selecting divinylbenzene and styrene as a carrier; using phthalate as a stationary phase, coating the stationary phase on the surface of the carrier to prepare a special saturation analysis chromatographic column, and selecting a chromatographic column with an inner diameter of 4 mm and a length of 2.2 m made of stainless steel; using an organic solvent cleaning method + a hot cleaning method to treat and maintain the contaminated detector; and using a combination of a standard curve method and a normalization method to calculate the instantaneous peak area and the total peak area. After the application of the new method, the measurement accuracy is higher, the various deviation calculations and mathematical statistics values are smaller, the relative standard deviation of the new method is less than or equal to 2.5%, the recovery rate is more than 97.5%, the technical quality and the measurement accuracy are doubled, the dosage of the medicament and the emission of toxic substances are reduced, and the work efficiency and the analysis efficiency are improved.

The application provides a modified styrene-divinylbenzene resin and a preparation method and application thereof.The modified styrene-divinylbenzene resin has a first nitrogen-containing group without a hydroxyl group and a second nitrogen-containing group with a hydroxyl group, wherein the first nitrogen-containing group is selected from one or more of a secondary amine group without a hydroxyl group, a tertiary amine group without a hydroxyl group, a quaternary ammonium group without a hydroxyl group and a nitrogen heterocyclic group without a hydroxyl group, and the second nitrogen-containing group is selected from one or more of a secondary amine group with a hydroxyl group, a tertiary amine group with a hydroxyl group and a quaternary ammonium group with a hydroxyl group.The modified styrene-divinylbenzene resin can be used for adsorption of siloxane, in particular, has a high removal rate for high-concentration siloxane, and has good stability and can be reused.

The present application relates to a kind of for synthesizing carbonate electrocatalytic system and its application.The electrocatalytic system includes working electrode, counter electrode, reference electrode, electrolyte and reaction device;The working electrode includes first catalyst and gas diffusion layer;Second catalyst and solvent are included in the electrolyte;The preparation method of the first catalyst includes the following steps: (1) ion liquid monomer, divinylbenzene are mixed with initiator in solvent, and polymerization reaction is carried out, to obtain polyionic liquid precursor;(2) polyionic liquid precursor is calcined, to obtain the first catalyst;Second catalyst includes palladium carbon material;The solvent includes C1-C2 alcohol.The present application is designed by electrocatalytic system, obtains a kind of in-situ self-optimizing deposition system, breaks the static limitation of traditional pre-catalyst.

The application belongs to the technical field of functional polymer materials, and particularly relates to a magnetic nanoparticle modified polymer monolithic column, a preparation method and application. The monolithic column is prepared by an in-situ thermal initiation polymerization method, styrene is used as a functional monomer, divinylbenzene is used as a crosslinking agent, dodecanol and toluene are used as binary pore-forming agents, azobisisobutyronitrile is used as an initiator, and Fe3O4 / SiO2 composite nanoparticles are added, and the magnetic nanoparticle modified polymer monolithic column is prepared through a polymerization reaction. The preparation method is simple, easy to operate and mild in reaction conditions, the prepared monolithic column is uniform in structure, good in permeability and large in specific surface area, and has good separation performance. As a separation medium, the prepared monolithic column is combined with a USB4000 optical fiber spectrometer by using high-frequency electromagnetic induction heating technology, a new online detection method of benzene series is established, the application range of the monolithic column is expanded, and a novel idea is provided for chromatographic separation and detection technology.