222 results about "Polymer modified" patented technology

The invention relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a special coating for a large machine tool casting lost foam as well as application and a use method of the special coating. According to the invention, the full-temperature-range functional composite material and the composite aggregate are used for synergistic reinforcement, and mullite is used for high-temperature reinforcement; the temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance; spodumene is used as a thermal expansion adaptive fluxing agent, so that medium-temperature healing and thermal expansion adjustment of a coating system are facilitated; the composite reinforced fibers are reinforced and toughened aiming at large thermal stress of thick and large parts; as an ultralow-temperature glazing agent, the boron-containing glazing agent can form an initial liquid phase at about 450 DEG C to seal the surface of the coating and purify a ventilation channel; the rare earth oxide serving as a high-temperature phase stabilizer can be dissolved in mullite crystal lattices, so that the high-temperature phase stability is improved, and ceramic nodes are refined. Through raw material design, on the premise of ensuring moderate air permeability, the ultrahigh strength and crack resistance of a coating system at extremely high temperature are improved.

The invention relates to the technical field of polymer composite materials, in particular to a cable polymer composite material for a wind turbine blade, which is prepared from the following raw materials in parts by weight: a polymer base material; a reinforcing material; a polymer modified material; a functional additive; a performance modifier; the functional additive is prepared from an anti-ultraviolet agent, an antioxidant, a silane coupling agent and nano titanium dioxide. According to the invention, the epoxy modified polyether-ether-ketone and bisphenol A epoxy resin compounded base material is matched with a continuous glass fiber, carbon fiber chopped strand and nano silicon nitride multi-element reinforcing system, so that the core short board of insufficient mechanical properties of the traditional material is thoroughly solved, and a magnesium hydroxide, aluminum hydroxide, expanded graphite and nano montmorillonite compounded flame-retardant system is also selected, so that the flame-retardant performance of the material is greatly improved. The flame-retardant cable material is high in flame retardance, free of toxic gas release, capable of meeting the environment-friendly requirement, capable of improving the material interface bonding force and long-term service reliability and capable of meeting the requirement for the service life of 20 years or above of wind power blade cables.

The invention discloses a lightweight heat-insulation cement-based composite material, and relates to the technical field of cement-based composite materials, the lightweight heat-insulation cement-based composite material comprises the following material components by weight: 40-60 parts of a cement matrix, 20-35 parts of a lightweight aggregate, 5-12 parts of a polymer modifier, and 0.5-0.3 part of a functional additive, the cement matrix is sulphoaluminate cement or Portland cement, and the functional additive is a water-based composite material. The lightweight aggregate comprises hollow glass beads with the particle size of 0.1-0.5 mm, expanded perlite with the particle size of 0.5-2 mm and surface modified aerogel particles, the aerogel particles are silicon dioxide aerogel or silicon carbide aerogel, the surface area of the aerogel particles is 700-600 m / g, the pore diameter of the aerogel particles is 40-50 nm, the polymer modifier is acrylate-styrene copolymer emulsion, and the particle size of the polymer modifier is 1-10 m / g. The solid content of the acrylate-styrene copolymer emulsion is 50-45%, the glass transition temperature of the acrylate-styrene copolymer emulsion is-10 DEG C to 15 DEG C, and the functional additive comprises a cellulose ether thickener, a polycarboxylate superplasticizer and a nano aluminum oxide dispersion liquid.

The invention belongs to the technical field of carbon fiber surface treatment, and particularly relates to a cross-linked polymer modified carbon fiber, a preparation method and a composite material. Aiming at the problem of insufficient interface bonding force between the existing polyarylsulfone / ketone thermoplastic sizing agent and the carbon fiber, the core of the invention is to apply a polyarylsulfone / ketone derivative of which a main chain or a side chain is provided with an electrochemically crosslinkable active group to the technical field of carbon fiber surface treatment. And constructing a covalent bond combined three-dimensional network structure coating on the surface of the carbon fiber in situ. According to the method, firm anchoring of the coating and the carbon fibers is achieved, and the interface load transmission efficiency and the interlayer shear strength of the carbon fiber / polyether-ether-ketone composite material can be remarkably improved. The method is mild in process condition, easy in parameter control and convenient in post-treatment, meets green manufacturing requirements, and has remarkable large-scale production advantages.

The invention relates to the technical field of lithium-ion solid-state batteries, in particular to a three-dimensional polymer modified intermediate layer for a lithium-ion solid-state battery and a preparation method of the three-dimensional polymer modified intermediate layer, and the preparation method comprises the following steps: adding polyacrylonitrile into N, N-dimethylformamide, and stirring until the polyacrylonitrile is completely dissolved; and then adding the modified polyamide acid-phosphonate copolymer, continuously stirring to obtain an electrostatic spinning precursor solution, and carrying out electrostatic spinning on the electrostatic spinning precursor solution to obtain the composite nanofiber membrane. According to the invention, the indium-containing heterocyclic modified diamine is used as a core monomer of the polyamide acid-phosphonate copolymer, the lithium deposition nucleation overpotential can be reduced by the excellent lithium-loving activity of the indium-containing heterocyclic modified diamine, the lithium is enabled to be compact and free of dendritic crystal deposition, and the indium-containing heterocyclic group is uniformly dispersed in a three-dimensional framework through a cross-linked network of the modified polyamide acid-phosphonate copolymer, so that the performance of the polymer is improved. The contact interface of the intermediate layer and the lithium metal forms a global uniform lithium-loving site, and concentrated deposition of lithium atoms caused by local lithium-loving activity difference is avoided.

The present application relates to the technical field of special functional coating materials for lost foam casting, and specifically discloses a special coating for large machine tool castings, and application and use method thereof. The present application synergistically strengthens full-temperature-range functional composite materials and composite aggregates, and uses mullite for high-temperature strengthening. Temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance. Lithium feldspar as a thermal expansion adaptive fluxing agent is more conducive to the medium-temperature healing and thermal expansion adjustment of the coating system. Composite reinforcing fibers are used to enhance and toughen the thick and large workpiece with large thermal stress. Boron-containing glazing agent as an ultralow-temperature glazing agent can form an initial liquid phase at about 450 DEG C, seal the surface of the coating, and purify the air passage. Rare earth oxides as high-temperature phase stabilizers can be solid-solved in the mullite lattice, improve the high-temperature phase stability, and refine the ceramic nodes. Through raw material design, the coating system has improved ultrahigh strength and crack resistance at extreme high temperatures under the premise of ensuring moderate air permeability.

The application relates to an epoxy polymer modified cement mortar coating device and belongs to the technical field of building construction. The device comprises a base and a sludge pump assembly, the top of the base is fixedly connected with two support frames, the outer wall of the support frame is slidably sleeved with sliding blocks, a slurry frame for containing cement is fixedly connected between the two sliding blocks, the top of the slurry frame is fixedly connected with a first scraper for smearing the cement on a wall surface, the second motor is started to drive the third scraper to rotate to polish the wall, the polished particles can be collected into the collecting frame, the first motor is started to drive the slurry frame to ascend and drive the arc-shaped plate to dig the cement, the cement is moved to the second scraper, the cement is moved to the first scraper, the cement quantity is controlled, and the device is convenient to use.

The invention discloses a polymer modified exterior wall putty manufacturing process and a product. The polymer modified exterior wall putty manufacturing process comprises the following steps: preparing the following components in parts by weight: 40-60 parts of an inorganic cementing material, 30-50 parts of aggregate, 2-8 parts of a polymer modifier, 0.1-0.5 part of cellulose ether, 0.5-2 parts of a waterproof agent and 0-5 parts of a functional additive; the inorganic cementing material and the aggregate are put into a mixing machine for dry mixing; and adding the polymer modifier, the cellulose ether, the waterproof agent and the functional additive, and uniformly mixing.

The application discloses an epoxy asphalt binder and a preparation method thereof, and belongs to the technical field of asphalt preparation, in particular relates to the binder which is composed of modified asphalt, epoxy resin material, compatilizer and anti-aging agent, and the mass ratio of the modified asphalt, the epoxy resin material, the compatilizer and the anti-aging agent is 100:15-60:5-10:0.1-0.5.The epoxy asphalt binder prepared by the application has excellent bonding performance and flexibility, in particular, the bonding performance at high temperature is significantly better than that of modified emulsified asphalt or polymer modified asphalt, and the flexibility is better than that of epoxy resin binder.

The application discloses electronic glass fiber cloth based on impregnating treating agent and a preparation process thereof, and relates to the technical field of electronic glass fiber cloth; and specifically comprises the following preparation steps: uniformly winding the sized glass fiber yarn on a warp beam to obtain glass fiber gray cloth through sizing weaving; performing heat desizing on the glass fiber gray cloth to obtain sized glass fiber cloth after cooling; sequentially performing water opening treatment, drying, impregnating treatment and drying on the sized glass fiber cloth to obtain the electronic glass fiber cloth; the impregnating treatment adopts an impregnating treating agent; the impregnating treating agent comprises the following raw materials: 1-3% functionalized silane, 0.5-0.8% polymer modified silane, 0.3-0.5% pH regulator, 0.05-0.08% surfactant, 0.04-0.07% defoaming agent and the balance of deionized water in percentage by mass; and the prepared impregnating treating agent effectively improves the high-temperature resistance and mechanical properties of the electronic glass fiber cloth.

This invention relates to a method for producing a stable copolymer composition, comprising adding an organic solvent, an alkyl-alkoxysilane and / or a C1-C9 alcohol, a monomer, and a free radical initiator to a reactor. The copolymer composition is based on a vinyl-branched ester polymer modified with a vinylsilane and a dehydrating agent. The copolymer composition can be formulated to a desired viscosity, can be applied using conventional techniques, and can be optimized for curing as a single-package system at room temperature in the presence of a suitable catalyst.

The present application relates to a kind of aromatic oxadiazole polymer modified membrane and its preparation method.The preparation method of the modified membrane includes the following steps: step (1) with terephthalic dihydrazide as raw material, with polyphosphoric acid as solvent and dehydrating agent, polymerization is carried out to obtain prepolymer solution, wherein ternary acid and polyol are added during polymerization reaction;Step (2) the prepolymer solution obtained in step (1) is made into film, dried, to obtain modified membrane.The present application constructs the new network structure of aromatic oxadiazole polymer, and the modified membrane prepared has good film-forming property, is soft and transparent, has good mechanical property, has high thermal stability and chemical stability.

The application provides a kind of nanoparticle, preparation method and its early screening related application of cancer, wherein, nanoparticle includes superparamagnetic nanometer core, cationic polymer modified on the surface of superparamagnetic nanometer core and targeted polypeptide grafted on cationic polymer, the targeted polypeptide can specifically recognize tumor specific antigen protein, and has the modular structure of rigid helix and charge repulsion sequence.The plasma low-abundance protein enrichment nanoparticle provided by the application can be used for the detection of early screening of tumor through liquid biopsy, can significantly improve the detection rate of early tumor, and has important clinical significance.

The application discloses a fluorine-containing polymer modified single-layer graphene oxide and a preparation method thereof. The graphene oxide is exfoliated into single layers in an organic solvent under ultrasonic assistance and nitrogen protection; meanwhile, a fluorine-containing polymer or a perfluoro acid anhydride containing active reaction end groups is used as a modifier to react with oxygen-containing groups such as hydroxyl groups on the surface of the graphene oxide, so that the fluorine-containing polymer modified single-layer graphene oxide is prepared. The preparation method of the fluorine-containing polymer modified single-layer graphene oxide has the advantages of simple process, complete reaction, mild conditions, controllable product structure and the like. The obtained fluorine-containing polymer modified single-layer graphene oxide can be highly dispersed in various solvents and matrices and keep a good single-layer state, effectively overcomes the problems of easy agglomeration and difficult dispersion of existing (modified) graphene oxides, and can be widely applied to the fields of design and preparation of graphene oxide-based high-performance composite materials and the like.

The invention relates to the technical field of coating material preparation, in particular to a microbead modified corrosion-resistant dry plating metal powder coating material and a preparation method thereof, and the material comprises carboxyl polyester resin, epoxy resin, a curing accelerator, a flatting agent, a degassing agent, a pigment filler, brush polymer modified microbeads, a metal pigment, a dry plating binder and a charge adjusting aid. According to the powder coating material, the corrosion resistance and durability are remarkably improved while the metal appearance and the construction stability are maintained, the coating film interface bonding is high, pore channels are few, and foaming, pitting corrosion and corrosion medium permeation along the interface in the salt mist environment can be effectively inhibited; after scratches or micro-cracks are formed, the coating film has micro-crack sealing / self-passivation capability, the corrosion rate extending along the scratches can be reduced, and the service life can be prolonged; and meanwhile, the powder is electrified uniformly, the powdering rate is high, the film thickness distribution is more uniform, the metal dry plating effect is stable, the color difference fluctuation in recycling is small, and the powder coating is suitable for metal base material protective coating with the requirements for appearance and corrosion resistance at the same time.

The utility model provides an inverted roof anti-cracking protective layer structure, which relates to the field of constructional engineering, and comprises a base layer, a protective structure layer is paved on the upper surface of the base layer, the protective structure layer comprises a waterproof layer, an anti-cracking layer is paved on the upper surface of the waterproof layer, a thermal insulation layer is paved on the upper surface of the anti-cracking layer, and a waterproof layer is paved on the upper surface of the thermal insulation layer. A protective layer is laid on the upper surface of the heat preservation layer, and a drainage layer is laid on the upper surface of the protective layer. According to the inverted type roof anti-cracking protective layer structure, the anti-cracking layer is laid on the upper surface of the waterproof layer, polymer modified mortar in the anti-cracking layer can improve the flexibility and binding power of the waterproof layer, and therefore the anti-cracking performance of the waterproof layer is enhanced, and the protective layer is laid on the upper surface of the heat preservation layer, so that the anti-cracking performance of the waterproof layer is improved. The heat preservation layer can be prevented from being damaged by mechanical damage and ultraviolet rays, and therefore the problem that a traditional inverted roof is prone to cracking is solved under the action of compounding of a plurality of materials.

The utility model provides a kind of polymer modified hot melt adhesive heat resistance testing device, it includes: shell;Test unit, the test unit is arranged in the inside of the shell, and two are oppositely arranged;Display screen, the display screen is provided with two, oppositely arranged in the both ends of the side of the shell, and with the test unit is connected;Filtering box, the filtering box is arranged in the other side of the shell;Gas delivery unit, the gas delivery unit is arranged in the top of the shell, respectively with the filtering box and the test unit is connected.In after testing, start air suction pump work, by air suction pump and second gas pipe, first gas pipe and air suction pipe can the gas in the inside of test unit is input to the inside of filtering box, then by filter screen and activated carbon filter layer in the inside of filtering box to gas filtration, and then harmful substance in gas can be filtered out, then by air outlet hole to the outside, avoid to cause influence to staff, convenient to use, more environmental protection.

This invention provides an electropolymer-modified aluminum current collector, its preparation method, and its application, relating to the field of aluminum foil current collector technology. By modifying the current collector surface, it primarily addresses the interface problem between the current collector and the active material, thereby improving the performance of lithium-ion batteries. This invention uses an aluminum foil current collector as the anode, a graphite plate as the cathode, and an acidic solution of a conductive polymer monomer as the electrolyte. Anodizing electropolymerization is performed using a constant current or constant voltage method, followed by washing and drying to obtain the electropolymer-modified aluminum current collector. The conductive polymer monomer is at least one of aniline, thiophene, and pyrrole; the concentration of the conductive polymer monomer in the electrolyte is 0.1-1.0 mol / L; and the polymerization time is 5-10 min. This invention effectively reduces the contact resistance between the current collector and the active material, improves the bonding strength between the coating and the substrate, and enhances the corrosion resistance of the current collector, showing promising application prospects.

The invention discloses a rigid-flexible synergistic polymer modified negative electrode material as well as a preparation method and application thereof. The polymer is prepared from one or more of a diamine monomer, a dianhydride monomer, crown ether, cyclodextrin and polyhedral oligomeric silsesquioxane. The polymer can form a porous interface layer with a protection effect after being modified on the surface of a negative electrode material by virtue of the rigid-flexible synergetic molecular structure characteristic of the polymer. When the negative electrode material is used for constructing a lithium battery, the interface stability can be remarkably improved, the cycle life can be remarkably prolonged, high energy density and excellent cycle stability are shown, and the negative electrode material has effectiveness and practical application potential in the aspects of inhibiting dendritic crystal growth, reducing gas production and prolonging the service life of the battery.

The invention provides a bentonite-based metal catalyst for reducing viscosity of thickened oil while drilling as well as a preparation method and application of the bentonite-based metal catalyst, and belongs to the field of oilfield chemistry in the petroleum industry. The preparation method of the catalyst comprises the following steps: hydrating bentonite, dropwise adding a hydrophilic monomer aqueous solution, sequentially adding a reducing agent aqueous solution and an initiator aqueous solution, and reacting to obtain a polymer modified bentonite aqueous phase; dropwise adding a first transition metal ligand solution for reaction; and then adding a second transition metal ligand solution to react. The catalyst disclosed by the invention can be used for efficiently catalyzing and cracking the thickened oil while drilling, so that the efficient viscosity reduction of the thickened oil is realized, and meanwhile, the lasting efficient viscosity reduction effect of the thickened oil can be kept. Moreover, the catalyst and the drilling fluid have good compatibility, negative effects on wall fixing and chip carrying capacity of the drilling fluid are avoided, the catalyst can be blended into the water-based drilling fluid, and chip carrying efficiency, rheological stability and high-temperature adaptability are maintained or enhanced.

The invention relates to the field of high polymer materials, and discloses a high-temperature-steaming-resistant PE (polyethylene) film and a preparation method of the high-temperature-steaming-resistant PE film. Comprising the following raw materials in parts by weight: 50-60 parts of metallocene polyethylene, 15-20 parts of bio-based polyethylene, 0.8-1.2 parts of dicumyl peroxide, 0.3-0.5 part of a cross-linking agent, 3-4 parts of nano silicon dioxide, 2-3 parts of layered double hydroxides, 0.5-1 part of graphene nanosheets, 8-12 parts of fluorine-containing polymer modified PE resin and 0.8-1 part of an organic tin-rare earth composite heat stabilizer. The shape and strength at high temperature are guaranteed through metallocene polyethylene and bio-based polyethylene, dicumyl peroxide is combined with a cross-linking agent to reinforce heat resistance and size stability, fluorine-containing polymer modified PE resin forms a fluorine-containing protective layer, an organic tin-rare earth composite heat stabilizer inhibits thermal degradation, a composite antioxidant captures free radicals, and the film is prevented from yellowing and embrittling.

This disclosure provides a pyrophosphate-free tin-copper co-plating additive, its preparation method, a tin-copper co-plating solution, and its application. The aforementioned tin-copper co-plating additive includes a primary complexing agent and an auxiliary complexing agent. The primary complexing agent is a modified branched polyamine polymer, which is generated by reacting a branched polyamine polymer with an oxazolyl carboxylic acid compound. The modified branched polyamine polymer contains amino ligands and nitrogen-oxygen mixed polydentate ligands. The auxiliary complexing agent is a cationic oligosaccharide complex. This tin-copper co-plating additive, with its amino ligands and nitrogen-oxygen mixed polydentate ligands in the modified branched polyamine polymer, can effectively regulate tin-copper co-plating, achieving a high tin, low copper deposition effect. This allows tin and copper to co-deposit at a uniform rate, effectively refining tin-copper grains, forming a tin-whisker-free, uniformly crystallized, flat, and dense tin-copper co-plating layer; it is also environmentally friendly.

The present application relates to a kind of slow-release multi-mineral feed additive and its preparation method applied to the technical field of feed additive, the additive is microsphere with three concentric ball structures, from outside to inside, in turn: outermost layer, include selenium and / or iodine, carrier is enterase sensitive polymer;Middle layer, include zinc and manganese, carrier is the pH-sensitive polymer modified by quaternary ammonium salt;Nucleus, include copper, carrier is slow-release skeleton material.The total particle size of microsphere is 100-200 μm, the thickness ratio of three layers is 1:(1.8-2.2):(1.8-2.2).Its preparation method uses "multi-stage atomization-layer-by-layer self-assembly-ladder temperature drying" integrated process, three layers of slurry are pumped out by coaxial three-channel atomizing nozzle, and are formed by ladder temperature zone drying and solidification.The present application realizes the directional gradient sequential release of mineral elements in the digestive tract of poultry, solves the antagonism problem among minerals, significantly improves the bioavailability, and the middle layer has antibacterial function simultaneously, can improve intestinal health, and is suitable for poultry feed such as laying hens.

A roofing tile is described featuring a digitally defined three-dimensional surface profile with controlled minimum and maximum heights and a specified average surface roughness (Ra). The topographical map, generated by computer algorithms—potentially using grey-level speckle maps—enables precise assignment of surface elevations and independent control of roughness parameters. This digital map is material-agnostic and applicable to tiles made from materials such as thermoplastic vulcanizate (TPV), ethylene-propylene-diene terpolymer (EPDM), or polymer-modified asphalt. The surface may include granule-like protrusions or other features, with their size and distribution tailored for functional or aesthetic purposes. The digital topographical map may guide manufacturing equipment to form the surface, and compliance may be verified by three-dimensional profiling. Methods for generating and measuring the surface profile, including pseudo-random algorithms and region-specific roughness, are provided, allowing for customizable, repeatable, and high-performance roofing tile surfaces.

This invention belongs to the field of polymer modification and provides a method for improving the wear resistance of polytetrafluoroethylene (PTFE) and cross-linked PTFE. The method includes the following steps: (1) providing a sintered PTFE block; (2) subjecting the sintered PTFE block to a first irradiation treatment using a first proton beam; (3) subjecting the material obtained in step (2) to a second irradiation treatment using a second proton beam; and (4) cooling the material obtained in step (3) to obtain cross-linked PTFE. By subjecting the sintered PTFE block to the first and second irradiation treatments, the obtained cross-linked PTFE exhibits a high degree of cross-linking and uniform distribution, and thus superior wear resistance.

A method for synthesizing melamine polymer modified zinc oxide nanoparticles is provided. In the method, polymer grafted zinc oxide nanoparticles are provided, and melamine is grafted onto the polymer grafted zinc oxide nanoparticles by adding melamine in the presence of a carboxy group activating reagent to the polymer grafted zinc oxide nanoparticles to form the melamine polymer modified zinc oxide nanoparticles. A method of corrosion inhibition in a wellbore by applying the melamine polymer modified zinc oxide nanoparticles is also provided. Further provided are zinc oxide nanoparticles comprising a melamine polymer of the following formula bonded to oxygen atoms are provided.

The invention discloses a two-stage trigger type time-controllable full-degradable material and a preparation method thereof, and belongs to the field of bio-based degradable high polymer materials. Aiming at the defects that a traditional degradable material is uncontrollable in time sequence, easy to attenuate in performance, poor in environmental adaptability and unrecyclable in resource, the invention provides the degradable material which is composed of a basic polymer, a modification auxiliary agent, a functional auxiliary agent and a microorganism synergistic component, and the degradable material is formed through gradient feeding, pre-plasticizing, copolymerization and step-by-step granulation processes. Two-stage degradation triggering, chitosan embedded microorganism catalysis and gradient structure collaborative design are adopted, and a closed-loop recycling and regenerating process is matched. According to the invention, the material is stable and reliable in use stage, is efficiently degraded after expiration, improves the adaptability to complex environment, optimizes mechanical and processing properties, realizes cyclic utilization of biomass resources, solves the industrial problem that degradation and use properties are difficult to consider, and has excellent practicability and environmental protection value.

The invention provides a nanoparticle, a preparation method and a cancer early screening related application thereof, the nanoparticle comprises a superparamagnetic nano core, a cationic polymer modified on the surface of the superparamagnetic nano core and a targeting polypeptide grafted on the cationic polymer, the targeting polypeptide can specifically recognize a tumor specific antigen protein, and has a modular structure comprising a rigid helix and a charge repulsion sequence. The plasma low-abundance protein-enriched nanoparticles provided by the invention can be used for early screening detection of tumors through liquid biopsy, can significantly improve the detection rate of early tumors, and have important clinical significance.

The invention discloses a composite electrode for rapidly detecting cortisol and application of the composite electrode in rapid detection of cortisol. The composite electrode comprises a laser-induced graphene substrate, a gold nano material layer modified on the laser-induced graphene substrate and a perfluorosulfonic acid polymer modified on the gold nano material layer. The composite electrode does not need an incubation binding step, is high in timeliness, improves the detection rate, can realize real-time analysis, and is stable in film-forming interface; the method is not influenced by the dispersity of a catalytic material, so that the difficulty of the product performance consistency requirement in a quality control link in industrial production is greatly reduced; the electrocatalytic analysis of cortisol can be realized in the PBS buffer solution, and the application range is wider.

The application relates to the technical field of vanadium redox flow battery diaphragm, and discloses a gel polymer modified ion exchange membrane and a preparation method and application thereof. A monomer solution is prepared by mixing cation monomers, anion monomers, nitrogen-containing monomers, a crosslinking agent, a metal salt and deionized water; an initiator solution and a reducing agent solution are respectively prepared by mixing an initiator and a reducing agent with pure water; a gel pre-liquid prepared by mixing the monomer solution, the initiator solution and the reducing agent solution is scraped on two sides of an ion exchange membrane to prepare a modified ion exchange membrane; finally, the modified ion exchange membrane is cleaned and soaked in dilute sulfuric acid to obtain the gel polymer modified ion exchange membrane. The modified ion exchange membrane with a crosslinked gel polymer layer has the functions of vanadium blocking, ion conduction, buffer protection and slow-release catalyst metal ion, so that the Coulomb efficiency, voltage efficiency, puncture resistance and synergistic ability with electrodes of the ion exchange membrane are effectively improved, and the overall performance of the battery is enhanced.