45 results about "Two-dimensional polymer" patented technology

The invention discloses a large-area two-dimensional polymer (two-dimensional polymer, 2DP) nanosheet-based proton exchange membrane (PEM), which is characterized in that an ionic 2DP nanosheet is used as a membrane main body material, an ionic polyelectrolyte is added as an intercalator, and the large-area PEM is prepared by a tape casting method after full mixing. The preparation method comprises the following steps: synthesizing an ionic group functionalized 2DP nanosheet solution by adopting a step-by-step single-phase polymerization method, dissolving polyelectrolyte in a proper solvent, fully mixing with the 2DP nanosheet solution according to a certain proportion, and preparing the 2DP-polyelectrolyte composite membrane by adopting a tape casting method. The preparation method is convenient, simple, controllable and convenient to operate. The prepared large-area 2DP-polyelectrolyte composite PEM has a large size (400cm < 2 >), excellent stability and extremely high proton conductivity.

The invention provides a preparation method of a two-dimensional high-strength coating material, which comprises the following steps: under the protection of inert gas, dissolving melamine and trimesoyl chloride as reaction monomers in a solution A, adding triethylamine as an acid-binding agent, and promoting amidation reaction through magnetic stirring; after the reaction is finished, washing with saturated saline solution and NaHCO3 to remove impurities, and then obtaining high-purity two-dimensional polymer powder through the steps of solution mixing, ultrasonic treatment, centrifugal separation and the like. And finally, dissolving polymer powder in the solution F to prepare two-dimensional polymer solutions with different concentrations, and coating the two-dimensional polymer solutions on the surface of a substrate pretreated by acetone and isopropanol to obtain a flat and compact coating film. The triethylamine is adopted as the acid binding agent, so that the purity and the reaction efficiency of the polymer are improved, the preparation controllability and the structural uniformity of the coating material are remarkably improved, and the high-performance coating requirements in the fields of machinery, chemical protection and the like are met.

The invention discloses a microporous metal organic framework material, a preparation method and a rare gas separation method, and belongs to the technical field of chemical adsorption separation, the microporous metal organic framework material is constructed by coordination of divalent metal ions, heterocyclic dicarboxylic acid ligands and nitrogen-containing heterocyclic ligands; divalent metal ions and heterocyclic dicarboxylic acid ligands are coordinated to form a two-dimensional polymer, and nitrogen-containing heterocyclic ligands serve as pillared bodies and are coordinated with the two-dimensional polymer to form a three-dimensional frame structure. A microporous metal organic framework material is used as an adsorbent and is in contact with a rare gas mixture, so that high-polarity rare gas is recognized and captured, and separation and purification of the rare gas are achieved. According to the invention, by changing different ligands and functional group substituents thereof, precise regulation and control of a pore chemical electrostatic environment are realized, so that selective separation of rare gases such as xenon / krypton, helium / neon and the like is realized.

The present invention relates to a crystalline, two dimensional polymer of Formula I and a process for the preparation thereof.

The present invention provides a method for preparing a gel polymer electrolyte membrane, comprising the following steps: blending a two-dimensional polymer carboxylate with a hydrophilic monomer, adding a cross-linking agent and a first initiator thereto, and reacting under light conditions to obtain a film; dialyzing and soaking the film to obtain a gel polymer electrolyte membrane; the two-dimensional polymer carboxylate preparation method is as follows: subjecting 3,5-diaminobenzoic acid and acryloyl chloride to a substitution reaction to obtain a monomer DBA; subjecting p-aminobenzoic acid and acryloyl chloride to a substitution reaction to obtain a monomer ADA; mixing the monomers DBA and ADA, adding an organic base and a second initiator thereto, and performing a polymerization reaction to obtain the two-dimensional polymer carboxylate. The present invention generates a gel polymer electrolyte membrane by blending the synthesized two-dimensional polymer carboxylate with the hydrophilic monomer. The introduction of the two-dimensional polymer carboxylate brings about stronger ionic interactions, thereby improving the mechanical properties of the membrane.

The invention relates to a composite material as well as a preparation method, application and a product thereof, belongs to the technical field of composite materials, and aims to solve the problems of poor toughness and relatively high expansion coefficient of the composite material so as to improve the barrier property and mechanical property of the composite material product. The composite material comprises a two-dimensional polymer and a high-molecular material matrix, wherein the high polymer material matrix is rubber or plastic. The two-dimensional polymer and the high-molecular material matrix have interface interaction and can better cooperate to bear stress together instead of being separated from each other, so that the overall performance of the material is improved; meanwhile, the two-dimensional polymer can limit thermal motion, caused by temperature, of a molecular structure of a high-molecular material matrix, so that the overall expansion degree of the composite material is reduced.

The invention discloses a preparation method of a Schiff base two-dimensional polymer / cellulose nanofiber heterogeneous ion channel membrane based on an interface super-assembly strategy. Melamine (MA) and benzenetricarboxaldehyde (BTCA) serve as raw materials, two-dimensional polyimide (2DPI) is synthesized through a Schiff base reaction, then the two-dimensional polyimide (2DPI) is stripped into a nanosheet dispersion under the assistance of trifluoroacetic acid (TFA), then the nanosheet dispersion is mixed with a DMSO dispersion of cellulose nanofibers (CNF), and the 2DPI / CNF composite membrane is obtained through super-assembly on a nylon membrane through vacuum-assisted filtration. The prepared composite membrane has good flexibility, water stability and cation selectivity, the 2DPI content is adjustable, and the composite membrane is suitable for nano-fluid devices. The preparation method is simple to operate and low in cost, and a novel ion channel material is provided for the fields of osmotic energy conversion and the like.

A high-flux ultra-thin polyamide nanofiltration membrane and a preparation method thereof, belonging to the field of membrane separation technology. It comprises a porous base membrane and a polyamide selective separation layer grown in situ on the surface of the porous base membrane; the polyamide selective separation layer is a two-dimensional polymer network structure prepared at an organic solvent-water / ice interface by a low-temperature method. The surface temperature of the base membrane impregnated with an amine monomer is reduced by a low-temperature method, and then the amine monomer and the acyl chloride monomer are polymerized at the organic solvent-water / ice interface to obtain a high-flux ultra-thin polyamide nanofiltration membrane. The present invention regards the interfacial polymerization process as a coupled process of "mass transfer-heat transfer-reaction", wherein the molecular diffusion of the monomer is a mass transfer process, the transfer of the reaction heat is a heat transfer process, and the polymerization of the monomer is a reaction process. The present invention effectively controls the three processes by adjusting the inherent temperature to form a high-flux ultra-thin polyamide nanofiltration membrane with a smoother surface, higher flux and smaller thickness.

The application discloses a conjugated two-dimensional polymer film and a preparation method and application thereof. The preparation method comprises the following steps: placing a copper substrate in a mixed solution containing an organic monomer and a polar solvent, then adding a ligand and performing an interfacial polycondensation reaction, so as to in-situ grow the conjugated two-dimensional polymer film on the surface of the copper substrate. The preparation method provided by the application can in-situ obtain various conjugated two-dimensional polymer films with different bonding connections on the surface of copper. The prepared conjugated two-dimensional polymer film has adjustable pores, a smooth morphology, a controllable thickness and a strong interlayer pi-pi interaction force, and can be widely applied in selective adsorption and separation, photo / electric catalysis, chemical sensing, organic electronics and other fields. Meanwhile, the conjugated two-dimensional polymer film / metal copper composite material prepared in the application can be directly used as an active electrode and applied in electrolytic water, carbon dioxide reduction electrocatalytic reaction and electrochemical seawater uranium extraction.

The invention provides a preparation method of a gel polymer electrolyte diaphragm, which comprises the following steps: blending two-dimensional polymer carboxylate with a hydrophilic monomer, adding a cross-linking agent and a first initiator into the mixture, and reacting under an illumination condition to obtain a thin film; and dialyzing and soaking the thin film to prepare the gel polymer electrolyte diaphragm. The preparation method of the two-dimensional polymer carboxylate comprises the following steps: carrying out substitution reaction on 3, 5-diaminobenzoic acid and acryloyl chloride to obtain a monomer DBA; p-aminobenzoic acid and acryloyl chloride are subjected to a substitution reaction, and a monomer ADA is obtained; and mixing the monomer DBA with the monomer ADA, adding organic alkali and a second initiator into the mixture, and carrying out polymerization reaction to prepare the two-dimensional polymer carboxylate. The gel polymer electrolyte diaphragm is generated through blending reaction of the synthesized two-dimensional polymer carboxylate and the hydrophilic monomer, stronger ionic interaction is brought by introduction of the two-dimensional polymer carboxylate, and the mechanical property of the diaphragm is improved.

The application discloses a battlefield in-situ repairing method for multifunctional composite bulletproof armor and belongs to the technical field of bulletproof armor maintenance. The multifunctional composite bulletproof armor is sequentially stacked with a multifunctional energy management surface layer, a gradient transition layer, a main bearing layer, an internal energy absorption layer and an anti-collapse comfort layer from a bullet-approaching surface to a bullet-repelling surface, wherein the surface layer and the internal layer are made of a rare earth modified two-dimensional polymer, and the transition layer and the main bearing layer contain a rare earth modified aromatic thermosetting copolyester resin. According to the damage layer and the material type, a differentiated repairing scheme is adopted, that is, the surface pit damage is repaired by using 150-180 DEG C hot air or 365 nm ultraviolet light irradiation, and the internal crack damage is repaired by using 280-320 DEG C hot air. The application does not need to disassemble the armor and send it to a maintenance base, and a single person can operate the application. The typical damage repairing only needs 10-15 minutes, and the battlefield repairing efficiency and the equipment continuous operation capability are remarkably improved.

The invention provides a molecular chain woven composite product formed by in-situ compounding of one-dimensional and two-dimensional polymers based on mechanochemistry and a preparation method of the molecular chain woven composite product. The preparation method comprises the following steps: firstly, pre-mixing p-toluenesulfonic acid and thermoplastic plastic containing polar groups, and then adding the mixture into a millstone-shaped solid-phase mechanochemical reactor for co-milling; then co-grinding the collected solid product and p-phenylenediamine, co-grinding the collected solid product and trialdehyde phloroglucinol, collecting to obtain composite powder, and preparing composite granules through a vacuum devolatilization extrusion granulation process; and finally preparing the molecular chain woven composite product from the composite granules based on a conventional injection molding process. According to the preparation method, an in-situ intercalation scheme adopted when a conventional two-dimensional inorganic material and a polymer matrix are blended is broken through, and a novel two-dimensional and one-dimensional compounding method is realized. According to the invention, one-dimensional and two-dimensional polymer molecular chain woven composite products are successfully expanded to public application terminals in a low-cost processing mode.

The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation method and application of a water and organic solvent bistable two-dimensional polymer fullerene membrane.The preparation method comprises the following steps that an N-methyl pyrrolidone solvent and a two-dimensional polymer fullerene dispersion liquid are evenly mixed, and a C60 diluent is obtained; placing a substrate filter membrane containing a supporting membrane at the bottom on a filter head of a suction flask, taking a proper amount of N-methyl pyrrolidone solvent to completely wet the substrate filter membrane, starting a suction filtration pump, performing suction filtration for 1-3 minutes, closing the suction filtration pump, and fixing a filter cup at the upper end of the filter head; and starting the suction filtration pump again, and pouring the C60 diluent into the filter cup. The two-dimensional polymer fullerene dispersion liquid and NMP are mixed and subjected to suction filtration and annealing treatment, the two-dimensional polymer fullerene membrane is prepared, the two-dimensional polymer fullerene membrane allows water molecules to pass through and intercepts ions, interlayer bonding is enhanced, the swelling resistance and stability of the membrane are improved, and efficient liquid phase separation is achieved.

The invention provides a method for improving the fluorescence intensity of a two-dimensional polymer with excitation wavelength dependence, which comprises the following steps: (1) adding the two-dimensional polymer with excitation wavelength dependence into an organic solvent, stirring to obtain a uniform and transparent solution, adding fluorescent molecules and a catalyst into the uniform and transparent solution, and stirring to obtain a transparent solution; carrying out esterification or amidation reaction on the two-dimensional polymer with excitation wavelength dependence and fluorescent molecules; and (2) after the reaction is finished, precipitating, dialyzing, filtering and drying to obtain the product. Traditional fluorescent molecules are introduced into the two-dimensional polymer with excitation wavelength dependence to change the molecular aggregation state of the two-dimensional polymer and limit intramolecular rotation or intramolecular vibration, so that non-radiation attenuation is reduced, fluorescence of the two-dimensional polymer with excitation wavelength dependence is remarkably enhanced, and the fluorescence intensity of the two-dimensional polymer with excitation wavelength dependence is improved. According to the present invention, the excitation wavelength dependence is maintained in the relatively wide excitation wavelength range, the original blue and green are enhanced, the red fluorescence can be obtained through adjustment, and the red fluorescence intensity is correspondingly enhanced;

The invention discloses a two-dimensional amphiphilic polymer coating, a coating and a preparation method. The polymer coating is obtained by modifying two-dimensional polycarboxylate / polycarboxylic acid through a grafted alkyl chain. According to the amphiphilic polymer coating, the distribution density of hydrophilic groups in a two-dimensional plane is improved through the large specific surface area of the two-dimensional polymer, the best balance between hydrophilicity and hydrophobicity is achieved, the adhesive force with the plastic surface is remarkably improved, the coating has the lasting anti-fog performance, and the anti-fog performance of the coating is improved. Meanwhile, excellent wear-resistant and scratch-resistant performance is realized. The preparation method of the paint and the coating is simple, low in cost and suitable for industrial large-scale application.

The present disclosure relates to a two-dimensional polymeric fullerene and preparation method thereof, wherein the preparation method includes the following steps: providing metal intercalated polymeric fullerene; replacing metal ions in the metal intercalated polymeric fullerene with quaternary ammonium salts. The preparation method of the two-dimensional polymeric fullerene of an embodiment of the present application has simple process and low cost, which can achieve large-scale preparation of two-dimensional polymeric fullerene.

The present invention relates to a method for the synthesis of a two-dimensional or quasi-two-dimensional polymer comprising a surfactant, the two-dimensional or quasi-two-dimensional polymer film and the use for the production of membranes, electronic devices or catalysts.

A narrow-pore magnesium ion separation nanofiltration membrane and a preparation method thereof, belonging to the field of membrane separation technology. It comprises a porous ultrafiltration substrate and a selective separation layer of a polyamide material grown in situ on the surface of the porous substrate; the polyamide material is a two-dimensional polymer full-network cross-linked structure generated by interfacial polymerization at the amine monomer molecule-organic solvent interface. By utilizing the characteristics of the high saturated vapor pressure of the amine monomer, solid amine molecules are adsorbed on the surface of the porous ultrafiltration substrate, so that the amine monomer and the acyl chloride monomer undergo interfacial polymerization at the solid-liquid interface to obtain a narrow-pore magnesium ion separation nanofiltration membrane. The present invention completely eliminates the side reaction of acyl chloride hydrolysis during interfacial polymerization, and at the same time, the compact arrangement of amine monomers can make the polymerization reaction more intensive and orderly, thereby realizing the preparation of a narrow-pore separation membrane. The nanofiltration membrane prepared by the present invention can not only be used for efficient magnesium ion separation, but also has good application prospects in the field of rare earth concentration.

This invention provides a method for improving the fluorescence intensity of a two-dimensional polymer with excitation wavelength dependence, comprising the following steps: (1) adding the two-dimensional polymer with excitation wavelength dependence to an organic solvent and stirring to obtain a homogeneous and transparent solution, adding fluorescent molecules and a catalyst to the solution, and subjecting the two-dimensional polymer with excitation wavelength dependence to an esterification or amidation reaction with the fluorescent molecules; (2) after the reaction is completed, precipitation, dialysis, filtration and drying are performed to obtain the product. This invention introduces traditional fluorescent molecules into the two-dimensional polymer with excitation wavelength dependence to change the molecular aggregation state of the two-dimensional polymer, restricting intramolecular rotation or intramolecular vibration, thereby reducing non-radiative decay, resulting in a significant enhancement of the fluorescence of the two-dimensional polymer with excitation wavelength dependence, achieving the retention of excitation wavelength dependence within a relatively wide excitation wavelength range, enhancing the original blue and green colors, and being able to adjust to produce red fluorescence, with the intensity of red fluorescence also being correspondingly enhanced.

The invention discloses an anti-fingerprint hydrophobic and oleophobic coating based on a two-dimensional polymer and a preparation method of the anti-fingerprint hydrophobic and oleophobic coating, and relates to the field of coatings. Comprising the following steps: synthesizing a fluorine-containing amphiphilic monomer; synthesizing a two-dimensional amphiphilic polymer; grafting siloxane on the two-dimensional polymer: dissolving the two-dimensional polymer in trifluoroethanol, adding aminopropyl triethoxy siloxane and a condensing agent DCC, and removing the solvent after reaction to obtain an anti-fingerprint treatment agent; dissolving an anti-fingerprint treatment agent in ethyl perfluorobutyl ether to obtain a coating solution; and spraying the coating solution on a base material, and curing to obtain the anti-fingerprint hydrophobic and oleophobic coating. Through the molecular design of the two-dimensional amphiphilic polymer, the synergistic modification of the perfluorinated chain segment and siloxane and the low-cost solution process, the technical bottlenecks of the traditional anti-fingerprint coating in the aspects of wear resistance and light transmittance are successfully solved. The ultra-thin nano structure ensures the optical performance and endows the coating with industrial-grade durability at the same time.

The application discloses a kind of sp 2 A carbon conjugated two-dimensional polymer film and its preparation method and application.The preparation method comprises: the surface of substrate is treated with amino, and amino substrate is prepared;And the amino substrate is formed with organic monomer, catalyst, organic solvent mixed reaction system, then the mixed reaction system is heated to occur Schiff base reaction, hydroxy aldehyde polymerization, to obtain nanoscale sp 2 Carbon conjugated two-dimensional polymer film.The application first uses self-assembled monolayer assisted surface to initiate in-situ synthesis sp 2 Carbon conjugated two-dimensional polymer film, and the method is suitable for in-situ, rapid and large-area preparation of uniform nanoscale film on any substrate.The two-dimensional polymer film prepared has highly ordered structure, high specific surface area, high chemical stability and excellent in-plane conjugation, and can be widely used in harsh working environment, adsorption separation, energy conversion or optoelectronic devices and other fields.

The invention belongs to the field of organic synthesis, and particularly relates to a connector of a two-dimensional polymer, a monomolecular layer assembling method of the connector and a two-dimensional molecular preassembly. The linker is a molecule comprising a linker molecular core and at least one linking group; the linking group comprises at least one first type of functional group combined with the two-dimensional polymer, and the linker molecule at least comprises two first type of functional groups; the bonding at least comprises chemical bonding; the connectors and the two-dimensional polymers are combined in any number to form a layered polymer, and the thickness of the layered polymer is two times smaller than that of a single two-dimensional polymer. The connector disclosed by the invention can be universally suitable for assembling and combining almost all two-dimensional polymer molecules to construct a required two-dimensional assembly and / or a pre-assembly, and can be used for simultaneously assembling different types of two-dimensional polymer molecules to construct a novel composite two-dimensional molecular assembly to realize functionalization; and the method has wide universality, effectiveness and high efficiency.

The invention belongs to the technical field of polysaccharide polymer material preparation, and discloses a two-dimensional polymer brush taking a gamma-cyclodextrin two-dimensional porous organic polymer as a main chain, and a preparation method of the two-dimensional polymer brush comprises the following steps: taking the gamma-cyclodextrin two-dimensional porous organic polymer as a raw material, and carrying out surface functionalization reaction to obtain the gamma-cyclodextrin two-dimensional porous polymer brush. Then, carrying out polymerization reaction on the gamma-cyclodextrin two-dimensional porous organic polymer and an ionic monomer, so as to obtain the two-dimensional polymer brush taking the gamma-cyclodextrin two-dimensional porous organic polymer as a main chain. The two-dimensional polymer brush prepared by the invention has the advantages of good dispersibility, good uniformity, customizable hydrophilic and hydrophobic properties, good biocompatibility, full contact with biological tissues and the like, retains the host-guest chemical properties of cyclodextrin, and can be applied to antibiosis or protein adsorption.

This application discloses a two-dimensional polymer thin film based on reactive diffusion theory, its preparation method, and its applications. The film exhibits a typical bilayer structure: the lower layer is a continuous and dense covalent organic framework substrate film with good crystallinity; the upper layer is a cyclic / honeycomb Turing structure formed by the orderly assembly of nanoparticles, exhibiting strong periodicity and high uniformity. The preparation method employs gas-liquid interface reactive diffusion: the monomer is dissolved in a mixed solvent of DMF and chlorobenzene, and acetic acid is used as a catalyst, which is then dropped onto the surface of deionized water. By controlling the monomer concentration (5 mg / mL), molar ratio (2:3), drop volume (15 μL), and diffusion resistance, the Turing structure can be precisely controlled. This invention features a mild process, can be used for large-area preparation, and produces thin films with regular structures and excellent stability. It can be directly applied to flexible electronics, membrane separation, sensing, and catalysis, effectively solving the technical bottlenecks of uncontrollable morphology, low crystallinity, and difficulty in large-scale production of traditional two-dimensional polymer thin films.

The application discloses a kind of based on schiff base two-dimensional polymer composite membrane osmotic energy conversion device and its application.Schiff base two-dimensional polymer composite membrane is schiff base two-dimensional polymer / cellulose nanofiber composite membrane, which is prepared by interfacial superassembly strategy, has double nano ion channel and adjustable surface charge characteristics.The composite membrane is assembled between double conductivity cell, and the ion transport and osmotic energy conversion performance are tested under the concentration gradient of simulated seawater (0.5 M NaCl) and river water (0.01 M NaCl).It has a high output power density of 5.62 W / m 2 , and has good durability and cycle stability.The application provides a new intelligent nanochannel platform for efficient capture of blue osmotic energy.

The invention discloses a preparation method and application of a crystalline sp2 carbon conjugated two-dimensional polymer film. The thin film comprises a multi-element annular molecular structure formed by alternately polymerizing a first monomer and a second monomer, the first monomer is an amphiphilic methyl monomer with a functional side chain; the second monomer is a multi-aldehyde monomer. The preparation method comprises the following step: under the catalytic action of a catalyst, carrying out interfacial polymerization reaction on the first monomer and the second monomer at the interface of the first liquid phase and the second liquid phase. A methyl monomer is subjected to side chain modification to successfully realize an interfacial polymerization reaction to generate a single-layer or multi-layer crystalline film, side chain modification and amphipathy can stabilize an interfacial reaction system and reduce a reaction energy barrier, a condensation reaction of an interface can be effectively promoted, and various sp2 carbon conjugated two-dimensional polymer films are further synthesized; the preparation method provided by the invention has a large-scale prospect, and is green, simple, economical and environment-friendly to operate.

The invention provides a dynamic micro-interface polymerization method of a two-dimensional polymer material and application of the dynamic micro-interface polymerization method in preparation of a quasi-solid electrolyte, and the dynamic micro-interface polymerization method comprises the following steps: adding a first reaction monomer into a solvent, and stirring to obtain a first monomer solution; adding a second reaction monomer into the solvent, and stirring to obtain a second monomer solution; adding the second monomer solution into the reaction container, injecting the first monomer solution into the second monomer solution under a stirring condition, and reacting to obtain a mixed system; and carrying out suction filtration, purification and drying on the mixed system to obtain the two-dimensional polymer material. According to the dynamic micro-interface polymerization method disclosed by the invention, a dynamic micro-interface reaction system with a huge specific surface area is constructed through external mechanical stirring, and a reaction place is expanded from a limited two-dimensional plane to a massive micron-scale interface in a three-dimensional space, so that the core defect of insufficient interface area in static interface polymerization is fundamentally overcome.

The present invention discloses a two-dimensional amphiphilic polymer coating, a coating, and a preparation method. The polymer coating is obtained by modifying a two-dimensional polycarboxylate / polycarboxylic acid by grafting alkyl chains. The amphiphilic polymer coating of the present invention increases the distribution density of hydrophilic groups in the two-dimensional plane through the large specific surface area of ​​the two-dimensional polymer, achieves an optimal balance between hydrophilicity and hydrophobicity, significantly improves adhesion to the plastic surface, and imparts durable anti-fog properties to the coating, while also exhibiting excellent wear and scratch resistance. The preparation methods of the coating and coating are simple, low-cost, and suitable for industrial-scale applications.

The present invention discloses a BOPP / single-layer two-dimensional polymer composite film with high dielectric properties and a preparation method thereof, belonging to the technical field of capacitor metallization dielectric films. (1) Surface treatment of BOPP film; (2) TAPB and TPOC with different lengths of alkoxy chains; x Dissolve them in organic solvents respectively; (3) Prepare TAPB and TPOC x The solutions are mixed, and the mixed solution is dripped and spread on the surface of ultrapure water in the LB film drawing machine tank, and the mixture is left to stand until the solution evaporates; (4) the LB film drawing machine slide barrier speed is set to compress; (5) glacial acetic acid is dripped to make it spread on the surface of ultrapure water in the LB film drawing machine tank, and the mixture is left to react; (6) the LB film drawing machine slide barrier speed is set to compress to form a single-layer two-dimensional polymer film; (7) the single-layer two-dimensional polymer film is transferred to the surface of the BOPP film for deposition to form a composite film. The present invention prepares a composite film by depositing a single-molecular layer of two-dimensional polymer on the BOPP film, inhibits the charge migration at the electrode-medium interface, and improves the insulation properties of the film.