310 results about "Functionalized graphene" patented technology

The invention discloses a preparation method of a photocatalytic nanofiltration membrane based on IL-GQDs. The method comprises the following steps: pretreating bagasse, and applying the pretreated bagasse and imidazole ionic liquid (IL) to preparation of ionic liquid functionalized graphene quantum dots (IL-GQDs); the IL-GQDs are uniformly distributed on the surface of the base membrane by utilizing a vacuum-assisted low-temperature interfacial polymerization technology to form an ultrathin photocatalytic active layer; and finally, curing and cleaning to obtain the photocatalytic nanofiltration membrane based on the IL-GQDs. According to the prepared IL-GQDs, the membrane surface is endowed with high specific surface area and excellent photocatalytic activity, and meanwhile, an additional water transmission channel can be established under the condition that the pore diameter of the membrane is not changed, so that the problem of trade-off of a traditional membrane is solved. In addition, through combination of low-temperature and vacuum-assisted interfacial polymerization technologies, the membrane structure is more uniform and compact, defects on the surface of the membrane are reduced, and the stability and the anti-pollution capacity of the membrane are improved. The membrane disclosed by the invention shows relatively high water flux, salt recovery rate and long-term stability in water treatment application.

The invention relates to an adsorbent and a preparation method and application thereof, the adsorbent comprises a polymer matrix and a nanofiller uniformly embedded in the polymer matrix, the polymer matrix comprises a calcium / boron cross-linked polyvinyl alcohol-sodium alginate blend, and the nanofiller is sulfonic acid / carboxylic acid functionalized graphene oxide; the mass fraction of the nano filler in the adsorbent is 0.05%-0.60%; wrinkles and irregular hole structures are distributed on the surface of the adsorbent. The adsorbent is used for removing tritium in water and is high in adsorption capacity, stable in structure and good in recycling performance. The removal rate of tritium in the single-stage adsorption process is greater than 8.5%, and the removal rate of tritium in the third-stage adsorption process is 19.4-57.7%.

The invention discloses a high-strength modified polyethylene composite fiber and a preparation method thereof, and belongs to the technical field of fiber materials, carboxylated mesoporous silica microspheres are used as a matrix, the surface of the matrix is coated with a graphene sheet layer, then hydroxyethyl methylacrylate is grafted, functionalized graphene / mesoporous silica microspheres are obtained, the functionalized graphene / mesoporous silica microspheres are used as a filler, and the high-strength modified polyethylene composite fiber is prepared. When the polyethylene composite fiber is applied to a ship cable, the overall weight of the ship cable can be reduced, and relative slippage can be generated between graphene lamellas and mesoporous silica microspheres, so that stress is dispersed, and the strength of the polyethylene composite fiber is improved; a hydrophobic alkane long chain is introduced through esterification of the graphene / mesoporous silica microspheres and hydroxyethyl methylacrylate and graft modification of hydroxyethyl methylacrylate, so that the hydrophobic alkane long chain has good compatibility with white oil, and the microspheres are prevented from approaching and gathering by a steric hindrance effect, so that the hydrophobic alkane long chain is more uniformly and stably dispersed in the white oil.

The invention discloses a polyurethane elastomer for sealing and a preparation method thereof, and relates to the technical field of polymer materials, the polyurethane elastomer comprises polyether polyol, diisocyanate, a catalyst, a cross-linking agent, a stabilizer and a plasticizer; the polyurethane elastomer further comprises additives, the additives specifically comprise functionalized graphene oxide, an ionic liquid toughening agent, self-repairing microcapsules and a carbon quantum dot toughening agent, and the polyurethane elastomer is prepared based on the materials. According to the polyurethane elastomer for sealing and the preparation method thereof, the sealing property, the tensile property, the wear-resisting property and the self-repairing property of the material are remarkably improved. The functionalized graphene oxide, the ionic liquid toughening agent, the self-repairing microcapsule and the carbon quantum dot toughening agent are introduced into the polyurethane, so that the excellent performance of the polyurethane elastomer in high-stress, high-abrasion and damage environments is realized. The polyurethane elastomer not only has lower leakage rate and higher tensile strength, but also can be quickly self-repaired after being worn.

The invention relates to the technical field of coatings, in particular to an acrylate-epoxy resin composite coating and a preparation method thereof. According to the technical scheme, the coating is prepared from 25 to 35 parts of methyl methacrylate, 15 to 25 parts of butyl acrylate, 10 to 20 parts of epoxy resin E-5110, 8 to 15 parts of organic silicon modified acrylate prepolymer, 5 to 12 parts of fluorocarbon modified epoxy resin, 4 to 8 parts of core-shell structure corrosion inhibition nano container, 1 to 3 parts of functionalized graphene quantum dots and 4 to 10 parts of polyhedral oligomeric silsesquioxane maleimide modified amine curing agent. And 1-3 parts of a hindered amine light stabilizer. By integrating the core-shell structure corrosion inhibition nano container, the functionalized graphene quantum dots and the photo-thermal dual responsive curing agent component, the sensing, response and self-repairing of the coating on damage are realized, and long-acting corrosion resistance, weather resistance, bacteria resistance, mechanical property balance and intelligent maintenance are considered; and efficient and economical full-period protection is provided for equipment in an extreme environment.

The invention provides a preparation method and application of red nano-selenium particles, and relates to the technical field of nano-medicines.The preparation method comprises the steps that sodium selenite is dissolved in ultrapure water, silicate microspheres containing copper, zinc and aluminum are added, the pH value is 4.8, 1.5 M of ascorbic acid solution is dropwise added while stirring, the temperature is increased till solid ascorbic acid is added, the pH value is adjusted through NaOH, and nano-selenium suspension liquid is obtained through stirring reaction; the preparation method comprises the following steps: mixing and stirring a nano-selenium suspension, a sodium alginate sulfydryl graphene oxide mixture and a chitosan oligosaccharide citric acid buffer solution, centrifugally washing, and freeze-drying to obtain red nano-selenium particles, and preparing the copper-zinc-containing aluminosilicate microspheres through mesoporous template calcination and copper-zinc co-doping. The red nano-selenium particles prepared by the method have a core-shell structure, uniform particle size, high oxidation resistance and remarkable interface bonding strength.

The invention provides an antistatic talcum powder and graphene composite reinforced material and an in-situ polymerization process thereof, and belongs to the technical field of polymer composite materials. According to the antistatic talcum powder and graphene composite reinforced material and the in-situ polymerization process thereof, the antistatic talcum powder and graphene composite reinforced material is prepared from the following raw materials in parts by weight: 100 parts of matrix resin, 5-30 parts of modified talcum powder, 0.5-5 parts of functionalized graphene and 0.1-2 parts of an antistatic synergist, the modified talcum powder is subjected to surface treatment by a silane coupling agent, the particle size range is 1-10 [mu] m, and the functionalized graphene is graphene oxide or reduced graphene oxide. Through the synergistic effect of the silane coupling agent modified talcum powder and the functionalized graphene and in combination with the ionic liquid antistatic agent, the surface resistance of the material is remarkably reduced. Nanoscale dispersion is realized by adopting an in-situ polymerization process, and the method is suitable for the field of high-performance engineering plastics.

The invention discloses a graphene nano long-acting anticorrosive paint and a preparation method thereof, and relates to the technical field of anticorrosive paints.The graphene nano long-acting anticorrosive paint is prepared from 100 parts of epoxy resin and 1.0 part of a functionalized graphene mixture; the functionalized graphene mixture comprises a component 1, namely flexible interface-aminosilane functionalized graphene, and a component 2, namely long-chain alkyl grafted hydrophobic graphene; wherein the relative weight ratio of the component 2 in the functionalized graphene mixture, defined as the weight of the component 2 / (the weight of the component 1 + the weight of the component 2), is in the range of 0.1 to 0.4. According to the invention, the dual functionalized graphene is cooperated, and gradient curing and thickness-ratio self-adaptive adjustment are combined. The obtained coating has excellent internal stress buffering capability, stable surface hydrophobicity and wide adaptability to different construction thicknesses, and is excellent in corrosion-resistant comprehensive performance.

The invention discloses a preparation method and application of an amino-functionalized graphene quantum dot modified MXene loose nanofiltration membrane. The preparation method comprises the following steps: mixing an MXene nanosheet dispersion liquid with an aminated graphene quantum dot aqueous solution, and preparing an amino functionalized graphene quantum dot / MXene mixed dispersion liquid by adopting a self-assembly method; and filtering and depositing the obtained mixed dispersion liquid on the modified base membrane to obtain the MXene loose nanofiltration membrane. According to the preparation method disclosed by the invention, the zero-dimensional aminated graphene quantum dots are creatively embedded into the MXene nanosheets, so that the MXene loose nanofiltration membrane which is stable in structure and regular in stacking is prepared. The nanofiltration membrane has good separation performance on different dyes and inorganic salts while effectively inhibiting water swelling, is a next-generation separation membrane with high stability and high selectivity, is mild and simple in preparation process, and has a wide application prospect.

The invention relates to the technical field of wire and cable materials, and discloses a high-temperature-resistant and aging-resistant wire and cable material and a preparation method thereof.The high-temperature-resistant and aging-resistant wire and cable material is prepared from, by weight, modified polyetherimide, silane modified polyolefin, organic montmorillonite, surface modified nanometer aluminum oxide and surface functionalized graphene, an antioxidant, a silane coupling agent and a processing lubricant; the preparation method of the high-temperature-resistant and aging-resistant wire and cable material comprises the following steps: weighing and preparing raw materials; carrying out surface modification treatment on the nanofiller; drying the raw materials; premixing the components; reacting, extruding and granulating; and cooling, bracing and dicing. By adopting the technical scheme of synergistic application of the surface functionalized graphene and the silane modified polyolefin, the technical effect of remarkably improving the thermal stability and the mechanical property of the composite material is achieved, the problem that the performance of a traditional scheme is unstable at high temperature is solved, and the phenomena of filler agglomeration and material degradation are avoided.

The invention discloses a porous adsorption material for water environment purification treatment and a preparation method thereof, and belongs to the technical field of water body purification materials. The material is prepared from 30-50 parts of a matrix material, 5-15 parts of a cross-linking agent, 10-25 parts of a pore-foaming agent, 1-5 parts of a stabilizer, 10-15 parts of nano silicon dioxide and 5-8 parts of carboxyl functionalized graphene. According to the preparation process, a multi-stage pore structure is formed through hot bath prepolymerization, ultrasonic dispersion and template pore-forming technologies. The material has excellent adsorption performance on metal ions such as lead, cadmium, chromium and calcium and PFAS pollutants, experiments show that the calcium ion removal rate reaches 99.68%, and the adsorption capacity retention rate exceeds 90% after multiple times of regeneration.

The invention discloses a high-conductivity porous polymer composite material and a preparation method thereof, and relates to the technical field of conductive composite materials. The high-conductivity porous polymer composite material is prepared by mixing polyether-ether-ketone, amino-functionalized graphene, a silver nanowire / carbon nanotube hybrid filler, a porous polyimide microsphere carrier, an ionic liquid and an antioxidant. The preparation method comprises the following steps: preparing amino-functionalized graphene; preparing a hybrid filler microsphere complex; performing mixing; preparing a porous prefabricated body; and carrying out mould pressing and shaping. According to the composite material disclosed by the invention, through multi-scale structural design and environment-friendly process innovation, high conductivity, high-strength mechanical properties and light weight are realized under the condition of low filler addition amount.

The invention discloses a silane functionalized graphene oxide / waterborne polyurethane hydrophobic coating and preparation, and belongs to the technical field of paints.The silane functionalized graphene oxide / waterborne polyurethane hydrophobic coating is prepared by the steps that natural graphite powder serves as a raw material, and graphene oxide is prepared through a Hummer method; n-(beta-aminoethyl)-gamma-aminopropyl trimethoxy silane is grafted to the surface of the graphene oxide through a chemical reduction method, and GO-AATS composite filler is obtained; then, castor oil is used as a soft segment, isophorone diisocyanate is used as a hard segment, and a series of GO-AATS-WPU emulsions are prepared. According to the silane functionalized graphene oxide / waterborne polyurethane hydrophobic coating and preparation, chemical bonds are formed between graphene oxide and waterborne polyurethane, and the interfacial compatibility of graphene oxide and waterborne polyurethane is improved, so that the mechanical property, water resistance, corrosion resistance and thermal stability of the waterborne polyurethane coating are improved.

The invention relates to the technical field of electronic materials, and discloses a nano-structure-based flexible electronic material preparation method, which comprises: 1, dissolving 80-85% of a hydrogenated styrene-butadiene block copolymer (SEBS) in a tetrahydrofuran (THF) and N-methyl pyrrolidone (NMP) mixed solvent to form a matrix solution; 2, 12%-15% of functionalized graphene (EGO-PP) with the surface grafted with PEDOT: PSS is added into the matrix solution, and ultrasonic-shearing synergistic dispersion treatment is carried out; and step 3, performing programmed cooling control on the dispersion system, and cooling from 80 DEG C to 25 DEG C in stages to complete nano-network self-assembly. Matching ([delta] [delta] t; compared with the prior art that a blending method depends on high filler loading, the method provided by the invention has the advantages that a three-dimensional interpenetrating conductive network is formed by the functionalized graphene under the ultralow content of 1.8 vol% by using an ultra-low (0.5, 0.5) and Spinodal decomposition mechanism, and compared with a blending method which depends on high filler loading, the core contradiction of material embrittlement caused by high filler concentration is solved, and the flexibility is improved by 240% or above under the same conductivity.

The invention provides a preparation method and application of a wear-resistant and corrosion-resistant glass flake coating, and belongs to the technical field of coatings. The coating comprises a component A and a component B, wherein the component A comprises an epoxy resin matrix, a reinforcing filler, a self-repairing microcapsule and an auxiliary agent; the epoxy resin matrix is formed by compounding at least two different types of epoxy resin components, the first epoxy resin component is matrix resin, and the second epoxy resin component is toughening modified resin; the reinforcing filler comprises glass flakes subjected to surface modification, functionalized graphene and nano zirconium dioxide particles; the self-repairing microcapsule comprises a microcapsule wall and a self-repairing agent coated in the microcapsule wall; the auxiliary agent comprises a rheological auxiliary agent, a defoaming agent and a wetting dispersant; and the component B comprises a curing agent and a curing accelerator. The comprehensive wear resistance and corrosion resistance of the coating can be remarkably improved, and the construction adaptability of the coating is improved.

In one aspect, a sensor for detecting a drug of abuse (DOA) in a sample is disclosed. In some embodiments, the sensor includes a graphene layer, a plurality of binding agents, which bind to the DOA, coupled to said graphene layer to generate a functionalized graphene layer, and a plurality of electrical conductors electrically coupled to said functionalized graphene layer for measuring an electrical property of said functionalized graphene layer. While in some embodiments, such binding agents are monoclonal antibodies, in other embodiments they are polyclonal antibodies.

The invention discloses a self-repairing graphene-based wind driven generator blade protection film and a preparation method thereof, and relates to the technical field of wind power generation equipment protection. The protection film adopts a gradient structure of a bonding buffer layer, a self-repairing functional layer and a multifunctional protection layer; the self-repairing functional layer comprises a hybrid network formed by hydroxylated functionalized graphene and elastomer particles and bionic packaging microcapsules, inner layer capsules containing graphene quantum dot reinforced resin and a latent catalyst curing agent are packaged in the microcapsules, multiple times of repairing of the same damaged area can be achieved, and the repairing strength is high; the multifunctional protective layer endows the coating with super-hydrophobic, anti-icing and ultraviolet-resistant functions through fluorinated graphene and nano TiO2 (at) ZnO composite particles; the preparation process is mature, the comprehensive protection performance is excellent, and the coating is suitable for wind driven generator blade protection in the severe environment.

The invention discloses functionalized graphene for removing tritium from radioactive waste liquid and a preparation method and application of a graphene film, the functionalized graphene is a flaky substance formed by stacking lamellar structures, and the distance between the stacked lamellar structures is 7.5-8.7. The preparation method comprises the following steps: preparing graphene oxide powder; performing sulfonation on the graphene oxide powder to obtain sulfonated graphene aerogel; performing carboxylation on the graphene oxide powder to obtain carboxylated graphene; and mixing and stirring the sulfonated graphene aerogel and carboxylated graphene to obtain the functionalized graphene. The tritium in the tritium-containing liquid is separated by utilizing the membrane formed by the functionalized graphene, and the tritium removal technology has the advantages of mild reaction conditions, low energy consumption, easiness in large-scale production and the like.

The invention belongs to the technical field of functional films, and particularly relates to a preparation method of a high-thickness graphene heat conduction film. Comprising the following steps: (1) low-functionalized graphene powder is taken as a raw material, the content of an additive in the raw material is not more than 20wt%, and the solvent content is not more than 10wt%; (2) carrying out hot press molding on the raw materials in the step (1) at the temperature of 25-300 DEG C to obtain a dense graphene thick film; and (3) carrying out heat treatment on the dense graphene thick film in the step (2) in an atmosphere furnace with the temperature of 1000-3300 DEG C for a certain time to ensure interlayer ordering and crystal graphitization, so as to obtain the graphene heat-conducting film with high thickness and high heat conductivity, the thickness of the graphene heat-conducting film can reach more than 200 microns, and the heat conductivity of the graphene heat-conducting film can reach more than 1300W / mK. The preparation method is simple in operation process, low in cost, easy in scale amplification and suitable for preparation and performance improvement of the ultra-high-thickness graphene heat-conducting film, and the application range of the graphene film in the fields of heat management, electromagnetic shielding, nuclear technology, high-end instrument equipment and the like is widened.

The invention discloses a corrosion-resistant cable material, an energy storage cable and a preparation method of the corrosion-resistant cable material, and belongs to the technical field of cables. The corrosion-resistant cable material comprises the following raw materials: a hexadecylamine functionalized graphene bentonite copolymer, modified epoxy resin E5, chlorinated polyethylene, a plasticizer, paraffin, mica powder and an antioxidant. The hexadecylamine functionalized graphene bentonite copolymer is obtained by adding acidified bentonite into a graphene dispersion liquid, stirring and then carrying out hydrophobic modification through hexadecylamine; the modified epoxy resin E51 and 5-aminosalicylic acid are subjected to a hydrothermal reaction to obtain nitrogen-doped quantum dots, the nitrogen-doped quantum dots are ultrasonically mixed with ethyl alcohol, then the waterborne curing agent is added, then the epoxy resin E51 is added, and high-speed stirring is performed to obtain the cable material, the cable material has good waterproofness, corrosion resistance and mechanical performance, and stable operation of an energy storage cable can be guaranteed.

According to the organic silicon modified epoxy self-repairing anti-corrosion coating and the preparation method and application thereof, amino functionalized graphene, nano silicon dioxide and self-repairing microcapsules (dicyclopentadiene) are added into a coating formula in a chemical modification mode, the molecular structure of epoxy resin (bisphenol A type) is optimized, and the self-repairing anti-corrosion coating is prepared. On the basis of enhancing the physical and mechanical properties of the coating, better physical and mechanical properties, corrosion resistance, heat resistance and self-repairing functions of the coating are further realized. The coating can meet protection of parts with high corrosion resistance, high application environment temperature and abrasion and damage problems, is specifically applied to the fields of high-temperature pipeline protection, corrosion resistance of lithium battery shells, engine blades, photovoltaic supports and the like, and can prolong the service life of related parts and equipment.

The application belongs to the technical field of graphene material preparation, and particularly relates to a general covalent functionalized graphene (CFG) electrochemical preparation method, which comprises the following steps: (1) under the condition of a light sealing oil seal, graphite electrodes are subjected to electrochemical intercalation treatment by using concentrated sulfuric acid; (2) after the intercalation is completed, light sealing oil is injected into an electrolytic cell while the concentrated sulfuric acid is discharged; (3) in the electrolytic cell, a micro-liquid film reaction zone is constructed by using the density and phase solubility difference of the light sealing oil, the aqueous electrolyte and the heavy sealing oil, and the micro-liquid film reaction zone is contacted with the intercalated graphite electrode to make the intercalated graphite electrode electrochemically oxidized to generate CFG; (4) by controlling the relative intercalated graphite electrode of the micro-liquid film reaction zone to move directionally, the whole intercalated graphite electrode is gradually and completely converted into CFG; (5) the CFG structure after the reaction is placed into a solvent to be mechanically exfoliated to prepare a CFG dispersion liquid, and the CFG powder is obtained after drying treatment.

The invention relates to a method for producing a sorption material (10) on the basis of functionalized graphene aerogels and to the resulting sorption material (10). The method comprises the production of a water-based gel (18), the extrusion thereof and subsequent freeze-drying. The sorption material (10) is suitable for use as a sorption element in adsorption processes, in particular for separating carbon dioxide from ambient air.

A process can be used for the functionalization of graphene material by mixing graphene material with at least one silane. The functionalized graphene material is useful, for example, in thermoplastics.

The present invention discloses a PVA-nano copper composite material, its preparation method and application, which relate to the detection of amino anthraquinone drugs. The method comprises the following steps: 1) Citric acid and histidine are uniformly mixed in proportion, deionized water is added and dissolved by ultrasonic to obtain a reaction solution, and the reaction is carried out at an oven temperature of 150-250 °C for 3-6 h to obtain histidine-functionalized graphene quantum dots; 2) Weigh PVA and add it to deionized water, stir and boil until completely dissolved to prepare a PVA solution; add the histidine-functionalized graphene quantum dots to the PVA solution; adjust the pH to neutral with NaOH, and dropwise add a copper chloride solution under stirring; stir for 80-120 min, add 3% borax to make the mixture into a gel, and freeze-dry; 3) The freeze-dried gel is calcined in an inert gas atmosphere to obtain a PVA-nano copper composite material. The PVA-nano copper composite material is used for detecting amino anthraquinone, and the detection limit is as low as 3×10<supgt;−9< / supgt; mol / L, with high sensitivity.

The invention relates to the technical field of polymer composite materials, and discloses a cable sheath capable of improving a shielding effect and a preparation method thereof, the cable sheath capable of improving the shielding effect comprises the following components by weight: 70-110 parts of a polymer matrix precursor; 2 to 5 parts of an isocyanate group functionalized carbon nanotube; 1 to 3 parts of furfuryl functionalized graphene; 2 to 5 parts of nano manganese zinc ferrite; the polymer matrix precursor comprises polyether polyol and diisocyanate, and the cable sheath also comprises one or more of the following auxiliary additives: an antioxidant, a crosslinking agent, a crosslinking agent, a crosslinking agent, a crosslinking agent and a crosslinking agent. An ultraviolet absorber; a lubricant; and a foaming nucleating agent. According to the invention, by constructing a carbon nanotube / ferrite synergistic shielding network and a thermally reversible crosslinking network, the cable sheath has the functions of broadband efficient shielding and thermally induced self-repairing.

The application provides a heterogeneous membrane with different functional channels and a preparation method thereof, and the heterogeneous membrane comprises a base membrane and a double-sided graphene oxide membrane deposited on one side surface of the base membrane, wherein the double-sided graphene oxide membrane is sequentially deposited by amine group functionalized graphene oxide nanosheets and sulfonic acid group functionalized graphene oxide nanosheets by a vacuum filtration method. By changing the group type and distribution in the graphene oxide nanochannel, the application constructs a superimposed heterogeneous layer with ion rapid transmission function and lithium-magnesium high-efficiency separation function, and can effectively prevent magnesium ions from passing through while rapidly transmitting lithium ions, so that high-efficiency separation of lithium and magnesium is realized, and the application has a wide application prospect in the field of lithium extraction from salt lake brine and the like.

The present invention relates to a planar heating element comprising: a heating layer including graphene flakes, functionalized graphene and a nanohybrid material; and an electrode electrically connected to the heating layer, wherein the nanohybrid material has the functionalized graphene self-adsorbed on the surfaces of thermally conductive inorganic particles.

The invention discloses an oil-soluble Mo-functionalized graphene composite material as well as a preparation method and application thereof, and belongs to the field of lubricating oil additives. The preparation method comprises the following steps: (1) mixing a Mo-functionalized graphene composite material with an organic solvent, and performing ultrasonic treatment to form a solution A; (2) adding an amine reducing agent into the solution A, carrying out reduction reaction, filtering and washing to obtain a filter cake; and (3) mixing a long-chain organic compound, a coupling agent and a surfactant, performing ultrasonic treatment to form a mixed solution B, performing ultrasonic dispersion on the filter cake into the mixed solution B, and performing heating treatment, cooling, filtering, washing and drying to obtain the oil-soluble Mo-functionalized graphene composite material. Through partial reduction and chemical grafting processes, the Mo-functionalized graphene composite material is subjected to selective reduction firstly, then a coupling agent is utilized to graft a long-chain organic compound to the surface of the composite material, and an oil-soluble group is introduced, so that the dispersion stability and the anti-wear and anti-friction performance in lubricating oil are remarkably improved.

Aiming at the problems that a traditional shading film is low in transparency, poor in mechanical property, non-degradable and the like, the dispersity of an opacifying agent (surface modified TiO and functionalized graphene) is optimized through a nano-composite technology, and a multi-layer co-extrusion structural design (such as PETG / shading layer / PETG) is combined, so that the shading performance of the shading film is improved, and the shading performance of the shading film is improved. The visible light transmittance (30-60%) is kept, and meanwhile efficient broad-spectrum blocking of ultraviolet rays (larger than or equal to 95%) and infrared rays (larger than or equal to 80%) is achieved. The process disclosed by the invention is compatible with conventional extrusion stretching equipment, has high shading property, mechanical strength, working stability and environmental protection property, and is suitable for the high-end packaging fields needing shading protection, such as food, medicine and electronic elements.