28results about How to "Strong UV shielding effect" patented technology

The invention relates to the technical field of adhesive tapes, and particularly discloses a double-sided adhesive tape with excellent weather resistance and a preparation method thereof.The double-sided adhesive tape comprises a first release film layer, a first adhesive layer, a base material layer, a second adhesive layer and a second release film layer, the adhesive layer is prepared from an adhesive through simple processes of coating, drying and the like, industrial production is easy, and the adhesive tape has good weather resistance. The adhesive is obtained by mixing an acrylate polymer, modified polyvinyl alcohol, a defoaming agent and a plasticizer, the acrylate polymer and the modified polyvinyl alcohol have excellent adhesive power and can be firmly adhered to various materials, the raw materials of the adhesive form a stable composite system through structural complementation, and through chemical bonding and physical effects, the adhesive can be firmly adhered to various materials. The comprehensive performance of the double-sided adhesive tape is further improved, and the double-sided adhesive tape has excellent toughness and stability, is not easy to age and fall off, and is improved in weather resistance, adhesion and tensile strength, so that the double-sided adhesive tape is more durable in the use process.

The invention discloses a biodegradable film with high light transmittance and efficient ultraviolet shielding as well as a preparation method and application of the biodegradable film. The invention provides a biodegradable film with high light transmittance and efficient ultraviolet shielding. The biodegradable film comprises a bio-based degradable film and lignin-tannin composite nanoparticles located in the bio-based degradable film. According to the biodegradable film with high light transmittance and efficient ultraviolet shielding, the structural characteristics of the lignin and the tannin are fully utilized, and the ultraviolet shielding performance can be remarkably enhanced through composite particles generated through self-assembly of the lignin and the tannin, pi-pi accumulation of benzene rings in the lignin structure and rich phenolic hydroxyl groups in the tannin structure. In addition, the color of tannin is lighter than that of lignin, and the film color can be obviously reduced. Therefore, the biodegradable film with high transparency and efficient ultraviolet shielding effect can be prepared under the condition of low additive amount.

The invention belongs to the technical field of thin film materials, and particularly relates to a transparent ultraviolet-proof composite film as well as a preparation method and application thereof. The transparent ultraviolet-proof composite film provided by the invention is prepared from the following raw materials: acetylated lignin, a halloysite nano material, chitosan and polyvinyl alcohol, the acetylated lignin is loaded on the halloysite nano material. The specific transparent ultraviolet-proof composite film disclosed by the invention has high transparency on the basis of ensuring that the passing rate of ultraviolet light with the wavelength of 200-400nm is less than 5%, the passing rate of visible light with the wavelength of 400-780nm reaches more than 60%, and meanwhile, the transparent ultraviolet-proof composite film also has high mechanical property, is capable of blocking moisture and oxygen, is good in biological safety and is degradable.

The invention relates to the technical field of composite material preparation, and specifically discloses a composite preparation process for enhancing the mechanical properties of marine laminated wood. Wood powder, epoxy resin, antibacterial modified basalt fiber-titanium dioxide, a stabilizer and a curing agent are uniformly mixed, kneaded in an open mill, and hot-pressed in a hot press to obtain the marine laminated wood. The antibacterial modified basalt fiber-titanium dioxide contains a large number of active groups, which can form a three-dimensional staggered support network in a matrix, generate a cross-linked network structure, and effectively improve the mechanical properties of the matrix. The epoxy resin is used as an adhesive with strong bonding force, and can tightly bond the wood powder and other materials together, thereby reducing the waste of wood and improving the utilization rate of wood to achieve environmental benefits, forming a laminated wood with stable structure and high strength. Through a curing cross-linking reaction, a mesh structure can be formed, which further enhances the overall mechanical strength of the laminated wood and prolongs its service life.

The present invention discloses a strong and tough soy protein isolate-based film and its preparation process and application using a pulsed electric field for precise control. The strong and tough soy protein isolate-based film is prepared by mixing a soy protein isolate solution, a dialdehyde starch solution and a polyvinyl alcohol solution, adjusting the pH to 8.5-11, reacting for 10-50 minutes at 60-100°C and under the action of a pulsed electric field, and pouring the product into a culture dish, and drying the obtained product; the soy protein isolate-based film prepared by the present invention has excellent mechanical properties compared to other biomass film materials (cellulose, starch and chitosan films), the tensile strength of the material can reach 18.3MPa, and the elongation at break can reach 240.5%, which is 631% and 654% higher than the tensile strength and toughness of the soy protein isolate film with the addition of a traditional glycerol plasticizer; the obtained soy protein isolate-based film can block 97%-100% of the ultraviolet transmittance (≤400nm).

The invention relates to a micromolecular cyclophosphazene intumescent flame retardant with ultraviolet shielding performance and a preparation method thereof, and belongs to the technical field of flame retardant materials. The molecular formula of the flame retardant is C < 24 > H < 24 > N < 2 > < 1P3 >; the flame retardant is a micromolecular cyclophosphazene intumescent flame retardant integrating an intumescent system, the flame retardant contains higher nitrogen and phosphorus contents and has higher flame retardant efficiency, and the decomposition temperature of the flame retardant is close to that of a high polymer material, so that a synergistic effect can be better exerted, and the flame retardant effect is improved; meanwhile, a polycyclic structure is adopted for synthesis, so that the content of large pi bonds in a system is increased, the flame retardant is endowed with more excellent ultraviolet absorption capacity, the compatibility of the flame retardant and a polymer system can be promoted while the aging process of a polymer material is effectively delayed, and the mechanical property of a matrix is further improved.

The invention discloses an imine-based high-performance ultraviolet shielding photoresist and a preparation method thereof. The preparation method comprises the following steps: preparing an intermediate imino diphenol, and synthesizing an imino comonomer by using the intermediate imino diphenol; blending the imino comonomer with resin to obtain a photoresist precursor; and blending the photoresist precursor and an initiator to obtain the photoresist with excellent ultraviolet shielding capability and mechanical properties. According to the prepared imino comonomer containing the imino group and the urethane group, the urethane group provides a hydrogen bond site to increase compatibility, imine induces to form pi-pi accumulation, the formation of the hydrogen bond and the pi-pi accumulation enables the energy required by transition of a system from HOMO to LUMO to be reduced, and the ultraviolet shielding capability of a polymer is improved; the imine and benzene ring conjugated rigid skeleton enhances the strength of the polymer; the weak interaction between molecules increases the energy dissipation capability of the polymer, and the cured photoresist has excellent ultraviolet shielding performance and mechanical properties, and has very wide application prospects.

The invention relates to a preparation method of carbon dots based on an ethanol solvent and application of the carbon dots on a composite membrane. According to the invention, the ethanol-based functionalized carbon dots CDs are synthesized by using residues left after extraction of sargassum fusiforme polysaccharide and generated waste ethanol through a hydrothermal method. The preparation method has the characteristics of greenness, environmental protection, cheap and easily available raw materials and good biocompatibility. Besides, the carbon dots can be independently used, the water vapor permeability, the oxygen permeability, the ultraviolet shielding capability, the antioxidant activity and the antibacterial activity of the albumen glue can be remarkably improved by doping the CDs into a gelatin network, and the effects are remarkably improved along with the increase of the concentration of the carbon dots. The composite film has a good application prospect in fruit preservation, and can effectively increase the commodity rate of blueberry fruits and improve the quality and flavor loss in the storage process.

The invention discloses an anti-cracking anti-aging high-shading PC composite material, a preparation method thereof and application of the anti-cracking anti-aging high-shading PC composite material in manufacturing of plastic-coated aluminum products. The anti-cracking anti-aging high-shading PC composite material comprises the following raw materials in percentage by mass: 90-94% of PC resin, 2-6% of titanium dioxide and 2-6% of a toughening agent, the PC resin is siloxane copolymerized PC; the flexibilizer is a hydroxyl silicon modified methacrylic acid-butadiene-styrene copolymer. The preparation method comprises the following steps: uniformly mixing the raw materials, putting the mixture into a double-screw extruder, and carrying out melt mixing, plasticizing and extrusion to obtain the anti-cracking anti-aging high-shading PC composite material. The PC composite material is stable in performance, can be applied to plastic-coated aluminum products, and solves the problems of poor weather resistance, stress cracking and the like of the plastic-coated aluminum products.

The invention discloses rosin-based water-based antibacterial ink and a preparation process thereof, and belongs to the technical field of ink. The rosin-based water-based antibacterial ink is prepared from the following components in percentage by weight: 15 to 20 percent of water-based heat-resistant resin, 25 to 30 percent of composite pigment, 2 to 3 percent of green antibacterial agent, 6 to 8 percent of additive and 40 to 50 percent of deionized water, the water-based heat-resistant resin is obtained by polymerizing rosin modified resin, an emulsifier and acrylate, the composite pigment is a polyester carbon black composite material, and the auxiliaries comprise a dispersing agent, a thickening agent, a defoaming agent and a preservative. According to the technical scheme, the environment-friendly development requirement is met, meanwhile, the rosin-based water-based antibacterial ink further has good adhesion performance and antibacterial performance, the antibacterial effect is good, the antibacterial duration time is long, and the rosin-based water-based antibacterial ink can be widely applied to the field of various printed products such as tissue packaging.

The invention relates to an anti-aging cyclophosphazene metal frame structure nano flame retardant as well as preparation and application thereof, and belongs to the technical field of nano materials and flame retardance. The preparation method comprises the following steps: dissolving 2-aminopyrazine and a cobalt-based metal organic framework ZIF-67 in an organic solvent, heating to 55-80 DEG C, adding a phosphonitrilic chloride trimer solution, continuously heating, stirring, refluxing and reacting for 8-24 hours, and after the reaction is finished, collecting precipitates, washing and drying in vacuum to obtain the anti-aging cyclophosphazene metal frame structure nano flame retardant. The anti-aging phosphazene flame retardant with the metal frame structure, which integrates an acid source, a gas source and a carbon source, is obtained by combining a phosphazene flame retardant with a metal organic frame. The flame retardant has excellent flame retardant effect and anti-aging capability. The flame retardant is used as a flame retardant of a polymer system, has good compatibility with a matrix of the polymer system, has a decomposition temperature matched with that of the matrix, and can quickly achieve a flame retardant effect before combustion of the matrix.

The invention relates to a scratch-resistant shading heat-sensitive paper protective layer as well as a preparation method and application thereof, and belongs to the technical field of slurry or paper pulp compositions. The scratch-resistant shading heat-sensitive paper protective layer is mainly composed of gelatin, cellulose nanofibrils and glycerin. The cellulose nanofibrils contain lignin. The scratch-resistant shading heat-sensitive paper protective layer not only has excellent scratch resistance, but also can effectively shield ultraviolet light, so that the service life of the heat-sensitive paper is remarkably prolonged.

The application discloses an anti-freezing early-strength cement-based plateau repairing material and a preparation method thereof, and belongs to the technical field of building materials. The application first takes zinc acetate dihydrate and thiourea as raw materials, and porous hollow ZnO particles are prepared through a hydrothermal reaction, then polyacrylic acid and anhydrous ethanol are used for dispersing and modifying the porous hollow ZnO particles to prepare PAA composite suspension liquid; the PAA composite suspension liquid is blended with a sulphate-aluminate cement-based slurry, and after being stirred and compounded at 80 DEG C, the mixture is shaped and maintained at a low temperature of 0-10 DEG C. The application builds an internal support structure through the porous hollow ZnO particles, and combines the dispersing and modifying effect of PAA, so that the material has excellent low-temperature early strength and freeze-thaw resistance, and can effectively avoid problems such as cracking, peeling and collapse of a repairing layer in a plateau and alpine environment, the process is controllable, the performance is stable, and the application is suitable for rapid repairing engineering of cement concrete structures in an extreme environment at a high altitude.

The application discloses a kind of high light-transmitting high-efficiency shielding ultraviolet biodegradable film and its preparation method and application.The high light-transmitting high-efficiency shielding ultraviolet biodegradable film provided by the application includes: biobased degradable film and lignin-tannin composite nanoparticles located in biobased degradable film.The high light-transmitting high-efficiency shielding ultraviolet biodegradable film provided by the application makes full use of the structural characteristics of lignin and tannin, and the composite particles generated by self-assembly of lignin and tannin, the π-π stacking of benzene ring in lignin structure and the rich phenolic hydroxyl in tannin structure can significantly enhance the ultraviolet shielding performance.In addition, tannin is lighter than lignin, which can significantly reduce the color of the film.Therefore, a biodegradable film with high transparency and high-efficiency ultraviolet shielding effect can be prepared at low addition amount.

This application provides an energy-saving, environmentally friendly, and highly transparent borate glass and a preparation method thereof. The chemical general formula of the highly transparent borate glass is: Sr 2.99‑a B 14 O 24 : 0.01Ce 3+ / 4+ , aCs + ; wherein, 0 < a ≤ 0.04. The energy-saving, environmentally friendly, and highly transparent borate glass of this application has stronger ultraviolet shielding ability by doping ions Ce 3+ / 4+ . Its ultraviolet shielding region range is broadened by regulating the content ratio of Ce 3+ / Ce 4+ . It also has near-infrared shielding performance by co-doping Cs + . The energy-saving, environmentally friendly, and highly transparent borate glass of this application has ultraviolet and near-infrared shielding abilities, and at the same time has sunscreen and heat insulation effects, and can be used in daily life fields such as buildings and vehicles that require heat insulation and ultraviolet protection. The preparation method of an energy-saving, environmentally friendly, and highly transparent borate glass of this application regulates the degree of reducing atmosphere in the synthesis process by adjusting the amount of reducing carbon, thereby changing the concentration ratio of Ce 3+ / Ce 4+ to change the ultraviolet shielding region range of the transparent borate glass.

The present application relates to the technical field of environment-friendly packaging materials, and particularly relates to a packaging coating material, a packaging coating and a preparation method thereof, according to weight parts, the packaging coating material comprises the following components: 20-50 parts of ethylene-acrylic acid copolymer; 30-60 parts of polyhydroxyalkanoate; 5-25 parts of modified lignin; and 0.5-3 parts of processing aid; the modified lignin is at least one of acetylated lignin, hydroxypropylated lignin and carboxylated lignin. The packaging coating material provided by the present application is fully biobased and degradable, and a small amount of ethylene-acrylic acid copolymer is used, so that the overall coating can be completely degraded in industrial composting, the prepared coating has the effects of waterproofing, oil-proofing, oxygen and moisture resistance and ultraviolet shielding, and has a balance between rigidity and toughness.

The invention relates to the technical field of chili preservation, in particular to a fresh-cut chili preservative film as well as a preparation method and application thereof. The preparation method of the fresh-cut pepper preservative film comprises the following steps: S1, preparation of lignin nanoparticles LNP: dissolving lignin in a solution; then, water is dropwise added at the speed of 0.3 mL / min to 1.0 mL / min; and stirring, reacting at room temperature for 1-3 hours, standing and dialyzing to obtain the lignin nano-particles LNP, s2, preparation of a film forming solution: dissolving sodium alginate in water to obtain a sodium alginate solution; sequentially adding tea polyphenol and glycerol, and uniformly mixing to obtain a film forming solution; and S3, preparation of a composite film: adding lignin nanoparticles LNP into the film forming liquid, uniformly mixing, pouring, and drying to obtain the fresh-cut pepper preservative film. The fresh-cut pepper preservative film disclosed by the invention is relatively good in antibacterial performance and relatively low in water vapor transmission rate, and has excellent ultraviolet shielding performance and anti-fog performance.

The application discloses a preparation method of aluminum-doped zinc oxide with excellent light stability and ultraviolet shielding performance and application thereof, and belongs to the technical field of functional materials, and comprises the following steps: (1) Zn(CH3COO)2 and Al(NO)3 are weighed, mixed, and then methanol is added thereto, and stirring is conducted until all the solids are dissolved to obtain a primary mixed solution for standby use; (2) a KOH methanol solution is prepared, stirring is conducted until all the KOH is dissolved, then the KOH methanol solution is added drop by drop into the primary mixed solution obtained in the step (1), and stirring is uniformly conducted to obtain a mixed solution for standby use; (3) the mixed solution obtained in the step (2) is subjected to water bath heating and stirring, and after completion, filtration, washing and drying are conducted, and finally the obtained solid is calcined to obtain the product. According to the application, the ion doping engineering is accurately carried out starting from the material body design, under the premise that the ultraviolet shielding performance is not damaged, the photo-generated carrier separation is actively and effectively inhibited, the recombination of the photo-generated carrier is promoted, the light stability is significantly improved, and the generation of ROS is reduced.

The present invention provides a bacterial cellulose high-strength and high-transparency ultraviolet shielding composite film and its preparation method and application. The specific preparation process of the composite film includes: (1) extruding the bacterial cellulose hydrogel film to reduce the water content; (2) immersing the above bacterial cellulose hydrogel film in a carbon quantum dot / polyvinyl alcohol aqueous dispersion to absorb and swell until equilibrium; (3) drying the carbon quantum dot / polyvinyl alcohol / bacterial cellulose hydrogel film to obtain its composite film; (4) immersing the carbon quantum dot / polyvinyl alcohol / bacterial cellulose composite film in a resin solution, and preparing the bacterial cellulose high-strength and high-transparency ultraviolet shielding composite film by drying. The preparation process conditions of the present invention are easy to control, and the operation is simple and easy. The composite film of the present invention can improve the optical transparency of the pure bacterial cellulose film while having high strength and ultraviolet shielding performance, and can be widely used in electronic displays, building windows and other fields.

The invention discloses an anti-corrosion and high-weather-resistant alloy resin tile and a preparation process thereof. The preparation process comprises the following steps: S1, preparing a basic composite material; s2, adding vanadium oxide and zinc oxide composite nanoparticles prepared by a sol-gel method into the basic composite material; s3, introducing a dynamic cross-linked fluorosilicon-based polymer, and preparing a surface layer functional material through a dynamic cross-linking technology; s4, forming a multi-layer structure base material; s5, preparing a multi-layer co-extrusion tile material; s6, the interlayer binding force of the multi-layer co-extrusion tile material is enhanced through the ultrasonic activation bonding technology; s7, depositing a fluorinated graphene nano film by using a plasma enhanced chemical vapor deposition technology; and S8, crack detection and aging state real-time sensing are completed by combining the conductive polythiophene composite layer embedded in the bottom layer with an intelligent monitoring module. The preparation of the corrosion-resistant and high-weather-resistant alloy resin tile is realized by utilizing a bio-based material, multi-layer co-extrusion and an intelligent monitoring technology.

The invention provides a preparation method of an anti-ultraviolet aging thermal insulation fabric added with mica, and belongs to the field of fabrics. The preparation process comprises the following steps: preparing an antibacterial treatment solution; preparing an inner layer fabric; preparing a middle-layer fabric; preparing an outer-layer fabric; and bonding. The anti-ultraviolet aging thermal insulation fabric is formed by compounding the outer-layer fabric with the anti-ultraviolet aging performance and the thermal insulation performance, the middle-layer fabric with the thermal insulation performance and the inner-layer fabric with the antibacterial performance, and due to the fact that the anti-ultraviolet aging thermal insulation fabric has the excellent anti-ultraviolet performance, the excellent thermal insulation performance and the excellent antibacterial performance and also has the good air permeability, the anti-ultraviolet aging thermal insulation fabric has the good antibacterial performance. Therefore, the service life of the fabric can be effectively prolonged, and the practicability of the fabric is improved.

The application provides a solid glue coating, a preparation method and application thereof, and a preparation method of a surface-coated composite material, and belongs to the technical field of functional materials.The solid glue coating provided by the application comprises the following preparation raw materials in mass fractions: 50-95 parts of base resin powder, 1-20 parts of graphene oxide-nano titanium dioxide composite material, 1-20 parts of barium sulfate, 0.1-10 parts of a curing agent, 0.01-5 parts of a defoaming agent, and 0.01-5 parts of a wetting and leveling agent.The solid glue coating provided by the application is a high-thermal-conductivity and high-fluidity composite resin powder, can be coated on the inner surface of a mold in the forming stage of a composite material product, and is heated and solidified together with a composite material matrix, wherein the solid glue coating forms a uniform, smooth and dense coating on the surface of the composite material matrix, is perfectly fused with the composite material matrix, and thus an integrally-formed surface-coated composite material is obtained, and the operation is simple and environment-friendly.

The invention discloses a building curtain wall aluminum veneer with a weather-resistant color-retaining protective layer and a processing technology of the building curtain wall aluminum veneer, and relates to the technical field of high-performance aluminum veneers.According to the building curtain wall aluminum veneer with the weather-resistant color-retaining protective layer, by adding compound nanometer titania, the weather resistance of a coating is improved. And nitrogen doping treatment is further carried out, so that the ultraviolet-resistant effect of the aluminum veneer is improved. The preparation method comprises the following steps: firstly, coating the compounded nano titanium dioxide by using an aluminum-silicon composite coating agent, isolating direct contact between the compounded nano titanium dioxide and resin, passivating the surface activity, avoiding photocatalytic damage and improving the weather-proof effect. Then an amino modified fluorocarbon coating agent is used for secondary coating, a large number of amino groups on aminated chitosan can form hydrogen-bond coordinate bonds with hydroxyl groups on the surface of an aluminum-silicon coating, and the coating layer is prevented from falling off. And the fluorocarbon chain is grafted on the surface of the coating layer to form a hydrophobic interface, so that the hydrophobic effect of the aluminum veneer is improved.

The invention discloses an anti-UV color master batch for a reflective film of a guideboard and a preparation method of the anti-UV color master batch. The color master batch comprises the following components in percentage by mass: 10%-20% of yttrium-doped zinc oxide or modified yttrium-doped zinc oxide, 2%-5% of a dispersing agent, 2%-5% of an anti-ultraviolet agent, 0.5%-1% of an antioxidant and the balance of PMMA (Polymethyl Methacrylate) resin. The yttrium element is introduced into the zinc oxide, and the isoleucine and the sodium benzoate are used for regulating and controlling the morphology of the zinc oxide, so that not only is the ultraviolet shielding performance of the zinc oxide improved, but also the light transmittance can be improved by adding the modified zinc oxide into the color master batch. The anti-UV color master batch for the guideboard reflective film has the advantages of high mechanical strength, good ultraviolet resistance and good light transmission, meanwhile, the preparation method is simple, the raw materials are cheap and easy to obtain, and the anti-UV color master batch has a very good application prospect.

The present invention provides a physical sunscreen for sensitive skin and a preparation method thereof. The physical sunscreen for sensitive skin of the present invention is prepared by the following raw materials in parts by weight: 2.5 to 3.5 parts of nano zinc oxide, 1.5 to 2.5 parts of nano titanium dioxide, 1.3 to 2.1 parts of composite vegetable oils and fats, 0.3 to 0.4 parts of composite hyaluronic acid, 0.2 to 0.4 parts of composite plant extract A and 0.15 to 0.25 parts of composite plant extract B, wherein the nano zinc oxide is composed of 90 to 110 nm zinc oxide and 340 to 350 nm zinc oxide; the nano titanium dioxide is composed of 240 to 260 nm titanium dioxide, 340 to 350 nm titanium dioxide and 360 to 370 nm titanium dioxide. The sunscreen of the present invention is designed for sensitive skin, is mild and non-irritating, and has a good sun protection effect on sensitive skin, preventing sensitive skin from being sunburned.

The application relates to the technical field of material preparation, and discloses a preparation and application of a modified chitin nanocrystal-nano silver antibacterial hybrid material. The hybrid material is obtained by in-situ reduction of silver ions by taking aldehyde group functionalized chitin nanocrystals as a template agent and a reducing agent. The method provides a brand-new preparation method of aldehyde group functionalized chitin nanocrystals, is simple, compound structure is controllable, and is green and sustainable; meanwhile, the aldehyde group functionalized chitin nanocrystals are used as a template of nano silver, the reducibility of the surface aldehyde group is utilized to realize loading of the nano silver, and the modified chitin nanocrystal-nano silver antibacterial hybrid material is constructed; in addition, when the modified chitin nanocrystal-nano silver antibacterial hybrid material is used as a polylactic acid filler, the mechanical property, the antibacterial property and the ultraviolet resistance of the polylactic acid can be improved.

This invention relates to the field of polymer materials technology, specifically to photocurable organosilicon ionomers based on rigid-flexible networks, their preparation methods, and applications. The invention is prepared by UV curing of raw materials comprising the following components: acrylated polysiloxane; a multifunctional organosilicon crosslinking agent containing a rigid aromatic ring; an ionic liquid; and a photoinitiator. Through a synergistic crosslinking strategy combining rigidity and flexibility, this invention enables the ionomer to possess high tensile strength, high elongation at break, high transparency, and excellent UV shielding properties. The preparation process of this invention is simple and the curing is rapid. The resulting material has broad application prospects in flexible electronic devices, sun-protective and heat-insulating coatings, and other fields.

This invention provides a core-shell nanoparticle-modified epoxy resin and its preparation method, relating to the field of functional polymer materials technology. The method includes the following steps: preparing SiO2 nanoparticles using the Stöber method; in-situ polymerization of dopamine on the surface of the obtained SiO2 nanoparticles via molecular self-polymerization to prepare core-shell nanoparticles SiO2@PDA; using TDE-85 type epoxy resin as the matrix and core-shell nanoparticles SiO2@PDA as the modifier, preparing SiO2@PDA / EP modified epoxy resin by solution blending. The core-shell nanoparticles prepared by this invention not only have good interfacial bonding with the epoxy resin matrix but also exhibit a synergistic effect of scattering and absorbing ultraviolet light. The prepared SiO2@PDA / EP modified epoxy resin exhibits superior toughness, higher flexural strength, and excellent ultraviolet shielding performance.