72 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 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 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 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.

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.

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 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 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.

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.

The application discloses a kind of high-temperature-resistant flame-retardant fluororubber composite material for switchgear and a preparation method thereof, and relates to the technical field of fluororubber.The application uses gamma ray co-irradiation method to graft polyvinyl fluoride with diethyl allyl phosphate, and reacts with high methyl vinyl silicone rubber under the action of triallyl phosphate to form a dense three-dimensional hybrid network, increase the phonon scattering resistance to reduce the heat conduction efficiency, and the phosphorus component and the silicon rubber combustion product synergistically form a gas-solid dual flame-retardant barrier.The application grafts talc powder with vinyltriethoxysilane and modifies it by radiation and polymerization with diethyl vinylphosphonate to obtain a lamellar filler, delays heat transfer, and induces the directional formation of carbon layer to form a "lamellar-glass-carbon" composite barrier layer.The surface modification increases the specific surface area, improves the efficiency of free radical capture, and the hybrid crosslinking point formed by graft copolymerization and the matrix network form a double phonon scattering barrier.The high-temperature-resistant flame-retardant fluororubber composite material for switchgear prepared by the application has the effects of high-temperature resistance and flame retardance.

An embodiment of the present application discloses a display panel, a manufacturing method thereof, and a display device thereof. The display panel includes a light emission functional layer and a color filter layer, the color filter layer includes a light shielding units, a light shielding material in the light shielding units includes a light shielding composition. The light shielding composition includes a plurality of carbon black particles and at least one function group located on surfaces of the carbon black particles. The function group is an acidic functional group or a free radical capture group, the acidic functional group is one of a carboxyl group, a hydroxy group, and a carbonyl group. The free radical capture group is a ketone group.

The invention discloses a holographic material, a preparation method of the holographic material, a preparation method of a volume holographic grating, the volume holographic grating, a volume holographic optical waveguide and holographic equipment, and the preparation method comprises the steps: providing a solution of a free radical trapping agent and a photopolymer holographic sub-material, the free radical trapping agent is used for trapping free radicals generated when the photopolymer holographic sub-material is subjected to a photooxidation reaction and / or a thermal oxidation reaction; and uniformly mixing the solution of the free radical trapping agent and the photopolymer holographic sub-material to obtain the holographic material. In this way, the holographic material with the stability effectively improved, the service life prolonged and the holographic performance ensured can be obtained.

The application discloses an anti-aging matt powder coating and a preparation method thereof, and belongs to the technical field of coatings. The specific modified polyester resin A and the modified polyester resin B are compounded, so that the matt effect of the coating is ensured, and the weather resistance and the mechanical properties of the coating are obviously improved. In addition, the optimized compounded matt system is added, so that the coating has stable matt effect. The compounded anti-aging system is further added, so that the aging degradation of the coating is inhibited from multiple action mechanisms of free radical capture, ultraviolet shielding and peroxide decomposition, and long-acting weather protection is realized. Overall, the components of the powder coating are scientifically compounded, the powder coating is sprayed on a metal surface, the coating with the matt effect, excellent anti-aging and mechanical properties is obtained, and the powder coating has high application value and is suitable for large-scale production.

The invention relates to the field of spinning, and particularly discloses an anti-aging curtain cloth preparation method which comprises the following steps: S1, base cloth pretreatment: firstly, cleaning base cloth to obtain pretreated base cloth; s2, carrying out dipping treatment on the pretreated base cloth in a modified dipping solution containing an amino silane coupling agent, a nano titanium dioxide dispersion liquid, genipin and PAMAM, and then drying to obtain modified base cloth; s3, anti-ultraviolet coating liquid is prepared, then an anti-ultraviolet coating is formed on the modified base cloth, and the anti-ultraviolet coating liquid at least comprises acrylic resin, an ultraviolet light absorber, a free radical trapping agent, an aziridine cross-linking agent and a solvent; the invention further discloses the anti-aging curtain cloth prepared by adopting the preparation method. The anti-aging curtain cloth has the advantages that the anti-aging performance of the curtain cloth is improved, the anti-aging durability is further improved on the basis of the technology, and the curtain cloth still has the excellent anti-aging performance after being used for a long time.

The application discloses an anti-aging silicone rubber and a preparation method thereof, and belongs to the technical field of room-temperature curing foaming silicone rubber. The special structure design of the thorn-shaped titanium dioxide, the high specific surface area and the special crystal face orientation of the thorn-shaped titanium dioxide greatly increase the recombination rate of photo-generated electron-hole pairs, significantly passivate the photocatalytic activity, and in-situ capture a large number of hydroxyl radicals generated in the photocatalytic process on the surface of the thorn-shaped structure, prevent the diffusion of the hydroxyl radicals into the silicone rubber matrix to initiate the aging degradation chain reaction, and realize long-acting anti-aging. Through a low-temperature in-situ crystal orientation growth technology, the thorn-shaped titanium dioxide nano array is constructed on the surface of the thermal expansion microsphere under the premise of completely retaining the thermal expansion performance of the thermal expansion microsphere, so that the single filler simultaneously has the functions of closed-cell foaming, full-waveband ultraviolet blocking, free radical capturing and mechanical strengthening.

The application discloses a hot-melt anti-skid and continuous reflective pavement environment-friendly marking paint and a preparation process, and relates to the technical field of marking paint. The hot-melt anti-skid and continuous reflective pavement environment-friendly marking paint is composed of the following components in parts by mass: 40-55 parts of environment-friendly resin, 15-25 parts of composite glass beads, 10-20 parts of an anti-skid agent, 3-8 parts of environment-friendly pigment, 20-30 parts of filling material, 2-5 parts of functional additives and 1-2 parts of an anti-aging agent. The new anti-aging agent is introduced, and through the synergistic effect of multiple paths such as free radical capture and oxidation inhibition, the aging degradation of the marking line caused by environmental factors such as ultraviolet rays and high-low temperature alternation is greatly delayed, and the service life of the marking line is significantly improved.

The present application relates to the technical field of rubber, in particular to a kind of high-temperature-resistant perfluoroether rubber composite material and its preparation method, by weight parts include: perfluoroether rubber raw rubber 100 parts, perfluoro ionic liquid antistatic agent 1.5-4.0 parts, fluorine-containing crosslinking aid 1.2-3.5 parts, fluorinated nano reinforcing filler 6.0-12.0 parts, hindered amine radical trapping agent 0.3-1.5 parts, peroxide vulcanizing agent 1.2-2.5 parts, perfluoropolyether processing aid 0.3-1.5 parts. The present application is synergized under perfluorinated molecular framework, and a multi-functional network of ion conduction, chemical crosslinking, physical reinforcement and free radical stability is jointly constructed, so that the composite material is improved in terms of antistatic, high-temperature resistance, mechanical properties and the like.

The application discloses a polypropylene antibacterial composite aid and a preparation method thereof, and relates to the technical field of polypropylene antibacterial composite aids, and comprises the following components and weight proportions: 15-25 parts of silver-zinc zeolite antibacterial agent, 30-40 parts of talcum powder, 5-8 parts of metal ion passivator, 12-18 parts of melamine polyphosphate, 8-12 parts of epoxy functional polyolefin compatilizer, 10-15 parts of non-hindered amine type free radical trapping agent and 5-15 parts of a composite emulsifier system; the silver-zinc composite ions are loaded in the crystal lattice channel of the silver-zinc zeolite antibacterial agent, the content of silver ions in the silver-zinc composite ions is 1.2-1.8 wt%, and the talcum powder is modified by a titanate coupling agent. The silver-zinc zeolite antibacterial agent is mixed with the modified talcum powder, high-efficiency antibacterial effect is achieved, the problems of uneven dispersion and poor antibacterial durability of traditional antibacterial agents in polypropylene are solved, and the antibacterial rate is improved.

The present invention relates to the technical field of polymer materials, and in particular to a method for preparing an anti-aging PP injection-molded food packaging material. The method first synthesizes 4-amino-2-hydroxy-1-acetonaphthone through a nitration-reduction reaction, and then reacts with a terminal olefinic polyalkylene isocyanate to generate a low-polarity anti-UV oxidant containing a long-chain alkyl group; then, an active amino group is introduced through Michael addition and deprotection of N-Boc-ethylenediamine to obtain a modified anti-UV oxidant; finally, under nitrogen protection, the material is chemically bonded with maleic anhydride-grafted PP, and injection molded after melt blending with a nucleating agent, a toughening agent, and a lubricant. The resulting material imparts anti-aging ability through the naphthyl ring ketone-enol interconversion mechanism and free radical capture ability in the anti-UV oxidant. At the same time, the polarity matching between the anti-UV oxidant and PP is achieved by relying on the long-chain alkyl group, and the chemical bonding effect significantly inhibits migration, meeting the long-term safety protection requirements of food packaging.