94 results about "Radical trapping" patented technology

The invention relates to the technical field of photovoltaic packaging materials, in particular to a packaging composite material for a perovskite mine and a preparation method of the packaging composite material. The packaging composite material for the perovskite mine comprises a creep-resistant layer, a barrier layer and a low-temperature cross-linking layer, the creep-resistant layer comprises polyolefin resin, silane grafted POE (Polyolefin Elastomer) resin, an irradiation cross-linking agent and a first antioxidant; the barrier layer comprises polyolefin resin master batch and a free radical trapping agent; the low-temperature crosslinking layer comprises EVA resin, modified EVA resin, a low-temperature crosslinking agent, an anti-hydrolysis agent and a second antioxidant. According to the packaging composite material for the perovskite, the creep-resistant layer, the barrier layer and the low-temperature cross-linking layer are compounded, and the components of each layer are regulated and controlled, so that the water vapor barrier property, the high-temperature creep resistance, the damp-heat aging resistance and the like of the packaging composite material can be remarkably improved on the basis of reducing the corrosion damage to the perovskite material.

The invention relates to the technical field of ink, and particularly provides self-cleaning ink and a preparation method thereof, an atomic layer deposition process is adopted to construct a double-shell structure on the surface of anatase TiO2, the inner layer is a 2-5nm SiO2 compact isolation layer, the outer layer is photoresponse polyurethane, and dynamic coating is formed through 365nm ultraviolet light curing. The formula of the ink comprises urethane acrylate, a diluent, a photoinitiator, double-shell TiO2 and an auxiliary agent. Through the synergistic effect of energy band regulation and control, dynamic coating and free radical capture, the self-cleaning coating has the characteristics of efficient self-cleaning, long-acting weather resistance and environmental protection.

The invention discloses a weather-resistant heat-insulation waterproof coating for an outer wall and a preparation method of the weather-resistant heat-insulation waterproof coating. The waterproof coating comprises the following components in parts by weight: 27-35 parts of modified acrylate polymer emulsion, 35-50 parts of composite filler, 5-10 parts of a curing system, 4-8 parts of a coalescing agent, 0.1-0.5 part of a defoaming agent, 0.3-0.8 part of a flatting agent, 0.2-0.6 part of a mildew preventive, 0.5-1.0 part of a thickening agent and 1-5 parts of a pH regulator, the modified acrylate polymer emulsion is prepared by carrying out pretreatment and silanization modification on cardanol and then carrying out monomer pre-emulsification and free radical polymerization. According to the waterproof coating provided by the invention, a Si-O-C network and a hindered amine free radical capture system are introduced, so that the weather resistance is improved; fluoride-nano silicon dioxide is used for constructing a roughness-low surface energy synergistic waterproof interface; acid-washed fly ash floating beads, silicon dioxide aerogel and expanded perlite filler are compounded to form multiple heat conduction scattering paths so as to realize cross-scale porous filler heat preservation; the waterproof coating can serve in complex environments with large temperature difference fluctuation, acid rain and the like.

The invention discloses a manufacturing process of a physically foamed polyethylene insulated cable, and belongs to the technical field of cable preparation. The manufacturing process of the physically foamed polyethylene insulated cable comprises the following steps: step 1, twisting multiple strands of copper, and cleaning to obtain a conductor material; 2, adding polyethylene resin, nano silicon dioxide, a free radical trapping agent, a performance additive and an antioxidant 1010 into a high-speed mixer, then adding calcium stearate to obtain a mixture, and carrying out melt plasticizing, injection of a physical foaming agent, extrusion and cooling on the mixture to obtain an insulating layer material; and 3, tightly wrapping the insulating layer material on the surface of the conductor material, then wrapping the insulating layer material with an aluminum foil, then wrapping the insulating layer material with a polyurethane material, winding a metal steel wire on the outer layer of the polyurethane material, and carrying out laser engraving to obtain the physically foamed polyethylene insulated cable. The cable prepared by the method has excellent aging resistance, thermal stability, mechanical property and insulating property.

The invention provides low-density high-strength one-step polyurethane foam as well as a preparation method and application thereof, and belongs to the field of high polymer materials. The polyurethane foam material is prepared from the following components in parts by weight: 100 parts of polyol, 5-30 parts of a chain extender, 5-30 parts of a cross-linking agent, 0.5-5 parts of a foam stabilizer, 0.5-4 parts of a foaming agent, 0.5-4 parts of a free radical trapping agent, 0.1-1 part of a catalyst and 150-300 parts of isocyanate. The low-density rigid polyurethane foam material with excellent comprehensive mechanical properties is obtained through a one-step method. The foam has the characteristics of low density and high strength, can be used in the fields of aerospace, deep ocean, engineering construction, transportation and the like, and has a good application prospect.

The invention discloses a battery, a battery pack and electric equipment, and the battery comprises a positive electrode active material and 1, 1-diphenyl-2-trinitrophenylhydrazine. According to the battery disclosed by the invention, 1, 1-diphenyl-2-trinitrophenylhydrazine is used as a free radical trapping agent to capture active oxygen and metal ions released by the positive electrode active material, so that the side reaction of an electrolyte is inhibited, the gas production rate of the battery is reduced, and the cycle performance of the battery is improved.

The application discloses a waterproof coating for outer wall weather resistance, heat insulation and heat preservation and a preparation method thereof. The waterproof coating comprises the following components in parts by weight: modified acrylate polymer emulsion 27-35 parts, composite filler 35-50 parts, curing system 5-10 parts, film forming aid 4-8 parts, defoaming agent 0.1-0.5 parts, leveling agent 0.3-0.8 parts, mildew-proof agent 0.2-0.6 parts, thickening agent 0.5-1.0 parts and pH regulator 1-5 parts. The modified acrylate polymer emulsion is prepared by pretreating and silanization modifying cardanol, monomer pre-emulsification and free radical polymerization. The waterproof coating provided by the application introduces Si-O-C network and hindered amine free radical capture system to improve weather resistance; fluorine compound-nano silicon dioxide constructs roughness-low surface energy synergistic waterproof interface; acid washing fly ash floating beads, silica aerogel and expanded perlite filler are compounded to form multiple heat conduction scattering paths to realize cross-scale porous filler heat preservation; and the waterproof coating can serve in complex environments such as large temperature difference fluctuation and acid rain.

The invention belongs to the technical field of melamine resin preparation, and provides yellowing-resistant antioxidant melamine resin and a preparation method thereof. The preparation method comprises the following steps: firstly, by taking melamine, formaldehyde and a modifying reagent as raw materials, preparing a melamine prepolymer by adjusting reaction conditions; secondly, a quinone-phenol hybrid antioxidant is designed and prepared, and through introduction of a hybrid molecular structure, the quinone-phenol hybrid antioxidant has excellent free radical capture ability and oxidation inhibition effect; then, a multifunctional light stabilizer containing hindered amine, phosphine and triazine groups is synthesized, and the light stability and weather resistance of the material are remarkably improved by utilizing an intermolecular synergistic effect; and finally, uniformly dispersing and curing the melamine prepolymer, an antioxidant, a light stabilizer and other auxiliaries, and carrying out multi-step temperature regulation and curing treatment to prepare the melamine resin material with excellent performance.

The present invention discloses a photo-softenable resin composition, which contains: a compound having a disulfide bond; and a radical scavenger. Further, the present invention discloses a curable resin composition, which contains: a monomer having a disulfide bond and a functional group; a monomer having a substituent capable of reacting with the functional group; and a radical scavenger.

The invention relates to the technical field of silicone rubber, in particular to radiation-resistant silicone rubber for a high-performance cable. The composite material comprises a high-energy ray attenuation outer layer, a free radical dynamic capture middle layer and a stress buffer combination inner layer, wherein the outer layer contains nano titanium dioxide, cadmium tungstate, phenyl silicone rubber and a silane coupling agent KH-570; the middle layer contains a main antioxidant, an auxiliary antioxidant, vinyl silicone rubber and carbon nanotubes; the outer layer and the middle layer are crosslinked to form an interpenetrating network to improve the diffusion efficiency of free radicals, the antioxidant in the middle layer diffuses in a gradient manner to inhibit oxidation, and the white carbon black in the inner layer diffuses to form a nano anchor to enhance interlocking and free radical capture; the silicone rubber cable material has the advantages that the silicone rubber cable material can inhibit breakage and excessive crosslinking of silicone rubber molecular chains from ray shielding, free radical removal and stress relief, the protection efficiency is enhanced through a cross-layer synergistic mechanism, the comprehensive performance of the material in the intense radiation environment is effectively improved, and the long-term stable application of the silicone rubber cable in the intense radiation environment is increased.

Provided is a gas diffusion layer for a fuel cell. The gas diffusion layer comprises a carbon substrate and a microporous layer formed on the carbon substrate. The microporous layer contains carbon particles and a water-repellent resin that binds the carbon particles. The microporous layer contains a radical scavenger including nano-sized cerium oxide particles that have a controlled particle shape, which is rectangular parallelepiped, a cube, an octahedron, or a polyhedron having nine or more surfaces, and are doped with at least one non-metallic element selected from among nitrogen, phosphorus, sulfur, chlorine, and fluorine and / or at least one metal element selected from among La, Pr, Sm, Eu, Gd, Y, Zr, and Nb. The gas diffusion layer can effectively improve the durability of a fuel cell manufactured using same.

The invention discloses a model compound-based lipid oxidation free radical specificity induction and detection method, which comprises the following steps: catalyzing a model compound (cumene / cumene hydroperoxide) or a lipid sample by using iron ions (Fe < 2 + > / Fe < 3 + >) with different valence states, and specifically inducing to generate cumene alkyl free radicals, cumene peroxide free radicals and cumene alkoxy free radicals; the method comprises the following steps: reacting a free radical trapping agent PBN with active free radicals to generate a stable PBN-free radical adduct; the adduct is separated and qualitatively identified by utilizing HPLC-TOF / MS (High Performance Liquid Chromatography-Time of Flight / Mass Spectrometry), and is accurately quantified by HPLC-UV (High The method has the advantages that three key free radicals can be specifically distinguished and quantified, the sensitivity is high, the repeatability is good, the method is suitable for free radical analysis from a model system to a complex grease sample, and a reliable analysis means is provided for research on a lipid oxidation mechanism.

The invention relates to a metal organic framework for improving charge separation efficiency based on a conjugated benzene ring, a preparation method thereof and application of the metal organic framework in degradation of methyl orange. The invention relates to a complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n, in which NDC is 2, 6-naphthalenedicarboxylic acid, and TRZ is 1, 2, 4-triazole, and a preparation method of the complex of MOF-2 [Zn8 (NDC) 8 (TRZ) 8] n. The extended pi conjugation in MOF-2 results in significant improvements, including reduced band gap, enhanced visible light absorption, and more excellent charge separation efficiency, as proved by comprehensive ultraviolet-visible spectroscopic analysis, electrochemical analysis, and valence band-XPS measurements. 83.8% of methyl orange degradation is realized by the MOF-2 under the irradiation of visible light within 30 minutes. According to mechanism research performed by using a free radical capture technology and electron spin resonance (ESR) spectroscopy, superoxide free radicals (. O2 <->), singlet oxygen (1O2) and hydroxyl free radicals (. OH) are determined as main active species.

The invention provides an electromagnetic shielding material, a shell structure, a battery monomer, a battery and an electric device. The electromagnetic shielding material comprises a first coating, the first coating comprises a first oligomer, a first unsaturated monomer, a first photoinitiator and a modified MXene material, and the modified MXene material is an MXene material of which the surface is chemically modified with a hydrophobic group and an unsaturated group. The first photoinitiator generates free radicals under light irradiation, the free radicals can initiate a polymerization reaction between the first oligomer and the first unsaturated monomer to generate resin, and hydrophobic groups on the surface of the modified MXene material serve as functional groups with good compatibility with the oligomer, so that the interface bonding effect between the MXene material and the resin can be enhanced; and the unsaturated group can participate in curing crosslinking as a reactive group and improve the free radical capture efficiency, so that the dispersion effect of the MXene material in the resin can be effectively improved through the dual effects, and the risk of forming a conductive network is reduced, thereby improving the use safety of the electromagnetic shielding layer in the battery.

The invention relates to the technical field of sealing compounds, in particular to an anti-aging sealing compound and a preparation process thereof. The preparation process of the anti-aging sealing compound comprises the following steps: preparing the core crystal compound, preparing the anti-aging compound additive, and preparing the anti-aging sealing compound. According to the invention, a dual synergistic protection inner core of ultraviolet shielding and free radical capture is constructed, and mesoporous silica coating and organic modification are carried out, so that the dispersibility and interface bonding force of the auxiliary agent in organic colloid are improved; the nano titanium dioxide is added in batches, so that the dispersion uniformity of the nano titanium dioxide is improved, the nano titanium dioxide and the inner core form an anti-aging synergistic system, a continuous ultraviolet protection network is constructed, meanwhile, the bonding strength and flexibility of the sealing adhesive are enhanced, and the long-acting anti-aging life of the sealing adhesive is remarkably prolonged.

This invention, in the field of ink technology, specifically proposes a self-cleaning ink and its preparation method. Using atomic layer deposition, a double-shell structure is constructed on the surface of anatase TiO2. The inner layer is a dense 2-5nm SiO2 isolation layer, and the outer layer is a photoresponsive polyurethane. Dynamic coating is formed by 365nm UV curing. The ink formulation includes polyurethane acrylate, a diluent, a photoinitiator, a double-shell TiO2 layer, and an additive. Through the synergistic effects of energy band modulation, dynamic coating, and free radical capture, the present invention combines efficient self-cleaning, long-lasting weathering resistance, and environmental protection.

The invention relates to the field of chemical engineering, in particular to a stabilizer composition and a preparation method thereof, a purification method of a polycarbonate solution and a preparation method of polycarbonate. The stabilizer composition provided by the invention is formed by matching a multifunctional hindered phenol antioxidant, a high-temperature-discoloration-resistant hindered phenol antioxidant, a phenol-free high-phosphorus liquid spiro phosphite antioxidant, a carbon free radical scavenger, an inorganic acid absorbent and polycarbonate powder according to a certain proportion, the antioxidant is 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl] hydrazine, and the hindered phenol antioxidant resistant to high temperature discoloration is triethylene glycol bis [3-(3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate]. The stabilizer composition provided by the invention can provide protection for polycarbonate in high-temperature treatment (solvent removal, extrusion, injection molding processing and the like) processes, and the yellowing resistance of polycarbonate in the high-temperature process is improved.

The invention discloses a single-sided release film and a preparation method thereof, and belongs to the technical field of single-sided release films. The release film consists of 100 parts of a base film material, 5-20 parts of a release agent, 1-10 parts of a stabilizer, 0.5-5 parts of a cross-linking agent and 0.1-2 parts of a dispersing agent. Wherein the stabilizer is a stabilizer containing a deuterated group and a conjugated aromatic heterocyclic structure, phenyl / thienyl and deuterated tert-butyl in the molecular structure have a synergistic effect, and oxidation reaction is inhibited through a dual mechanism of free radical capture and physical steric hindrance. According to the preparation method, a compact cross-linked network is formed by adopting a micro gravure coating process and combining gradient heating curing and corona treatment. Experiments show that the deuterated phenyl-containing single-sided release film has high surface impedance stability after being aged for 200 days. The single-sided release film has the characteristics of excellent antistatic durability, high light transmittance and weather resistance, and is particularly suitable for the field of protection of optical display devices.

The application discloses a kind of water-based fireproof paint and preparation process thereof, and relates to functional coating technical field.The application uses fluorosilicon epoxy hybrid emulsion as base material, and comprises hydrophobic silica aerogel, composite microencapsulated flame retardant, composite bio-based charring agent, composite free radical trapping agent, reinforcing fiber and self-repairing microcapsule and other functional components.The water-based fireproof paint prepared by the application realizes efficient flame retardation and long-term protection through multiple synergistic mechanisms such as gas-phase free radical trapping, multi-layer heat-shielding shielding and self-repairing expanded carbon layer, and has excellent fire resistance, durability and mechanical properties.

The invention discloses a surface modification method and application of a high-nickel ternary positive electrode material. The preparation method comprises the following steps: dispersing a monomer compound containing a free radical capturing group in anhydrous acetonitrile, adding a certain amount of a polymerization reaction initiator, introducing protective gas, and continuously stirring at a certain reaction temperature for monomer polymerization; after the reaction is finished and cooling to room temperature, separating a polymer in a centrifugal manner, and then carrying out vacuum drying treatment at a certain temperature; and mixing the polymer material subjected to vacuum drying treatment with the high-nickel ternary positive electrode material, dissolving in anhydrous acetonitrile, stirring, centrifuging to obtain the treated high-nickel ternary positive electrode material, and then carrying out vacuum drying treatment at a certain temperature to obtain the modified high-nickel ternary positive electrode material. When the modified high-nickel ternary material is applied to a lithium battery positive electrode, the oxygen release amount of the high-nickel ternary positive electrode material under reciprocating circulation and high voltage is reduced, and the high-nickel ternary positive electrode material has long cycle life and high rate performance.

The application discloses a kind of core-shell structure flame retardant with anti-thermal oxidative aging function and application thereof in preparing flame retardant material, belong to flame retardant technical field.The core-shell structure flame retardant with anti-thermal oxidative aging function is composed of core and shell structure, wherein the core is flame retardant, and the shell structure is polymer containing hindered phenol and low-valence phosphorus, which can improve the hydrophobicity of flame retardant on one hand, and also improve the compatibility and dispersibility of flame retardant in polymeric material, thereby improving the flame retardant and mechanical properties of polymeric material.In addition, the hindered phenol and low-valence phosphorus in the shell polymer can not only capture RO· and ROO· free radicals to inhibit the thermal oxidative aging process of polymer, but also play a role in free radical capture during combustion, further improving the flame retardant properties of polymeric material.The flame retardant has excellent flame retardant properties and heat aging resistance, and can be applied in the fields of building, transportation, chemical industry, machinery, communication and energy.

The application discloses a sodium battery and a preparation method, a battery device and a power utilization device. The sodium battery comprises a gel electrolyte, wherein the gel electrolyte comprises a polymer and a free radical capturing agent, and the mass ratio of the free radical capturing agent to the polymer in the gel electrolyte is 1:(10-75). Thus, the free radicals can be captured by adding the free radical capturing agent, the reaction between the free radicals generated after the decomposition of the polymer in the electrolyte solvent and the sodium metal is inhibited, the interface stability between the gel electrolyte and the sodium metal can be improved, the generation of the gas of the battery is reduced, and the high-temperature performance of the battery is improved.

The invention discloses an on-line free radical detection device and an on-line free radical detection method, the device comprises a gas diffusion electrode flow cell, a cathode liquid flow channel plate is provided with a micro-channel for circulation of an electrolyte containing a free radical trapping agent and a liquid storage cavity; the cathode gas diffusion electrode is a working electrode; the electron paramagnetic resonance spectrometer is used for detecting free radical signals in the electrolyte; the electrochemical workstation is used for applying control potential to the working electrode; the temperature control module is used for controlling the working temperature of the gas diffusion electrode flow cell; and the data processing module is in electric connection or signal connection with the electron paramagnetic resonance spectrometer and is used for processing the free radical signal and obtaining the relative concentration or generation rate of the free radicals. According to the invention, in-situ capture and on-line detection can be carried out on short-life free radicals generated in the electrochemical reaction process under the condition of simulating the actual working condition of the fuel cell.

A photosensitive composition containing a radical polymerizable compound, a photo-radical polymerization initiator, and at least one selected from the group consisting of a chain transfer agent and a radical scavenger.

The application relates to a polycarbonate composite material and a preparation method thereof, and belongs to the technical field of high polymer materials; the composite material is composed of the following components in parts by weight: polycarbonate 70-80 parts, ABS resin 20-30 parts, a compatilizer 3.2-4.5 parts, a lubricant 0.6-0.8 parts, a modified light stabilizer 0.42-0.55 parts and an antioxidant 0.13-0.18 parts; the modified light stabilizer has a specific organic silicon-ester group alternating chain structure, a hindered amine group is introduced on the chain, is different from a conventional hindered amine light stabilizer, does not passively protect through spectral absorption or free radical capture, but actively and accurately acts on a micro-weak phase interface of the PC / ABS composite material, effectively relieves light aging of the phase interface, simultaneously forms a mechanical gradient transition zone at the phase interface, and effectively improves the overall performance of the composite system.

The invention discloses a high-safety lithium ion battery electrolyte containing a free radical scavenger and a preparation method thereof, and relates to the technical field of electrochemical energy storage, the electrolyte comprises a lithium salt, an organic solvent and the free radical scavenger; the free radical complementing agent is a bioactive antioxidant analogue or derivative, and the free radical complementing agent comprises ascorbic acid and one or more of salts, esters or structural analogues thereof. The free radical trapping agent, such as lithium ascorbate and erythorbic acid ester, is introduced into a lithium ion battery electrolyte system, so that key free radicals causing thermal runaway chain reaction are effectively captured, a reaction chain is interrupted, the temperature rise rate is greatly delayed, the highest temperature is reduced, the occurrence probability and intensity of extreme conditions such as valve spraying, fire outbreak and explosion are inhibited, and the service life of the lithium ion battery is prolonged. Chemical intervention is carried out at the early stage of the chain reaction, the development of thermal runaway is restrained from the source, and an effective new way based on a chemical quenching mechanism is provided for restraining the thermal runaway of the lithium ion battery.

The invention discloses a TPO material with high weather resistance and a preparation method thereof. The TPO material is prepared by chemically synthesizing a monomer with double functional groups of ultraviolet absorption and free radical capture, grafting the monomer to an ethylene-propylene copolymer skeleton to form a PO-g-(BTZ-HALS) auxiliary agent, and carrying out melt blending on the PO-g-(BTZ-HALS) auxiliary agent, a TPO base material, carbon black masterbatch and the like. According to the invention, a weather-resistant functional group is anchored in a polymer chain in a chemical grafting manner, so that the defects of easy migration, easy volatilization and poor compatibility of a traditional small-molecule auxiliary agent are effectively overcome. The tensile strength retention rate of the obtained TPO material is greater than or equal to 91% and the chromatic aberration delta E is less than or equal to 1.7 after the TPO material is aged by a xenon lamp for After the QUV composite aging for 1500h, the gloss retention rate is greater than or equal to 84.8%, the surface cracks are extremely few, and the yellowing index delta YI is less than or equal to 2.3. The material disclosed by the invention has excellent long-term weather resistance, color stability and surface integrity.

The invention belongs to the technical field of heat-conducting silica gel and discloses high-strength heat-conducting silica gel resistant to chemical corrosion and heat aging and a preparation method of the high-strength heat-conducting silica gel resistant to chemical corrosion and heat aging. Comprising the following components in parts by weight: 100 parts of modified chemical corrosion-resistant heat-aging-resistant benzene type polysiloxane, 1.5-3 parts of a tackifier, 63-100 parts of a modified filler, 0.034-0.61 part of an inhibitor, 0.067-1.02 part of a platinum catalyst and 0.5-0.9 part of a cross-linking agent, benzene type polysiloxane is used as a main chain, a rigid benzene ring inhibits high-temperature conformation change, phonon loss is reduced, and an efficient heat conduction channel is constructed through a three-dimensional cross-linked network and pi-pi accumulation; the glass fiber enhances the mechanical property and the puncture resistance; fluorine atoms improve chemical corrosion resistance, and a free radical trapping agent improves heat aging resistance.

The invention relates to a polycarbonate composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The composite material is prepared from the following components in parts by weight: 70 to 80 parts of polycarbonate, 20 to 30 parts of ABS (Acrylonitrile Butadiene Styrene) resin, 3.2 to 4.5 parts of compatilizer, 0.6 to 0.8 part of lubricant, 0.42 to 0.55 part of modified light stabilizer and 0.13 to 0.18 part of antioxidant, the modified light stabilizer has a specific organic silicon-ester group alternating chain structure, a hindered amine group is introduced to a chain, and the modified light stabilizer is different from a traditional hindered amine light stabilizer, is not passively protected simply through spectral absorption or free radical capture, but actively and accurately acts on a microscopic weak phase interface of the PC / ABS composite material, so that the composite material is protected. Meanwhile, a mechanical gradient transition area is formed on the phase interface, and the overall performance of a composite system is effectively improved.

The application discloses a high-stability papermaking dry-strength agent based on acrylamide and a preparation method thereof, which comprises the following components in parts by weight: 25-40 wt% of acrylamide 40-60 parts, 45-55 wt% of cationic monomer 8-26 parts, 50-65 wt% of anionic monomer 10-24 parts, 12-24 parts of organic silicon waterproof agent, 15-28 parts of chain transfer agent, 14-22 parts of hexamethylenetetramine, 15-27 parts of photosensitive initiator, 10-20 parts of azo initiator, 8-16 parts of free radical trapping agent and 12-18 parts of isocyanate. Through polymerization, the amphoteric polyacrylamide is generated, the amphoteric polyacrylamide can be adsorbed on the surface of the negatively charged fiber in the paper pulp, so that the binding force between the fibers is increased, and the paper strength is improved.