889 results about "Polymer solution" patented technology

The present application discloses a continuous dynamic and efficient devolatilization method for a polymer / volatile system based on high mass transfer interfaces, including the following steps: providing a dynamic single-screw devolatilizer, feeding a polymer solution to the devolatilizer, wherein the polymer solution includes polymer and volatile substances with small molecule weight, and the volatile substances include organic solvents, residual monomers, water or reaction by-products; conveying and compressing polymer materials by the screw downstream a devolatilization section, and extruding the polymer materials out of the dynamic single-screw devolatilizer directly; or providing a side-feeding extruder downstream of the devolatilization section and feeding plastic additives into a devolatilized polymer melt, and then melt blending the plastic additives with the devolatilized polymer melt at an end of the dynamic single-screw devolatilizer before exiting the dynamic single-screw devolatilizer.

The present disclosure pertains to methods for enhancing the properties of conventional Li / Al-LDH by integrating polymers to provide compositions comprising a Li / Al-LDH material and a polymer. The present disclosure further pertains to methods of using such polymer-modified-LDH to improve lithium adsorption and extraction performance. The disclosed methods can comprise incorporating the polymer during the precipitation reaction or by mixing the Li / Al-LDH product with a polymer solution under specific conditions. During the lithium extraction process, the disclosed compositions comprising a Li / Al-LDH material and a polymer can be used as an excellent lithium adsorbent to capture lithium ions from low-concentration lithium resources due to its improved physicochemical properties. The disclosed compositions comprising a Li / Al-LDH material and a polymer provides compositions for lithium extraction from low concentration resources, as well as expands the scope of lithium adsorbent material development.

The invention discloses a method for constructing a multicellular living body material by adopting a droplet bioreactor, which belongs to the crossing field of biological materials and microbial engineering, and comprises the following steps: (1) resuspending different cells in different polymer solutions to prepare degradable or phase-separable hydrogel particles containing cells; (2) dispersing the hydrogel particles in a cross-linkable hydrogel matrix to form a composite hydrogel; and (3) curing the composite hydrogel, and then carrying out degradation treatment to obtain the liquid cavity structure multicellular system bioreactor with spatial partition and dynamic interaction characteristics. According to the invention, ordered distribution and metabolism synergy of different microorganisms in space can be realized, controllable degradability and excellent mass transfer performance are realized, bacterial slow release and metabolite exchange can be maintained, and the method is suitable for long-term stable operation of a continuous flow reactor. The method has wide application prospects in the fields of green biological manufacturing, renewable energy source production, environmental restoration, biomedical engineering and the like.

The invention relates to a lithium ion battery and a preparation method thereof. The lithium ion battery comprises a positive pole piece, a negative pole piece and a gel electrolyte, the gel electrolyte is formed by polymerizing an electrolyte prepolymerization solution, and the mass percentages of a cross-linking agent, a monomer and an initiator in the electrolyte prepolymerization solution are A%, B% and C% respectively; a positive electrode material layer in the positive electrode plate is formed by coating the surface of a positive electrode current collector with positive electrode slurry; the positive electrode slurry comprises a fast ion conductor, and the mass percentage content of the fast ion conductor in the positive electrode slurry is X%; the lithium ion battery satisfies the following relational expressions: the formula 1: 5 < B / A < 10; in the formula 2, C / (A + B) is more than 0.005 and less than 0.02; formula 3: 1.7 < = (A + B + C) / X < = 5.5. According to the scheme provided by the invention, a high-performance organic-inorganic hybrid network can be constructed, and the cycle performance of the battery is remarkably improved while the thermal shock performance of the battery is improved.

The invention discloses an electrostatic ionization device and an array spinning ionization box, and relates to the field of textile processing machinery, the electrostatic ionization device comprises an ionization assembly, the ionization assembly is provided with a backflow groove with a top opening, and a metal wire which is horizontally arranged and can be externally connected with a power supply is arranged above the backflow groove; the reciprocating assembly comprises a liquid supply brush making contact with the upper surface of the metal wire and can drive the liquid supply brush to reciprocate along the axis of the metal wire and coat the surface of the metal wire with a polymer solution used for electrostatic ionization. The liquid supply assembly can store a polymer solution and convey the stored polymer solution to the liquid supply brush, and the backflow groove is communicated with the liquid supply assembly and can collect the polymer solution dripping in the process that the surface of a metal wire is brushed by the liquid supply brush and flow back into the liquid supply assembly. According to the electrostatic ionization device and the array spinning ionization box, the solution utilization rate can be increased, rapid replacement of multiple solution varieties can be achieved, raw material waste is reduced, and the production cost is reduced.

The invention belongs to the field of flexible piezoelectric polymer materials, and discloses a polyvinylidene fluoride based ferroelectric polymer and a preparation method thereof. The preparation method comprises the following steps: (1) adding an inorganic alkaline reagent into a polyvinylidene fluoride-trifluoroethylene ferroelectric polymer solution, carrying out dehydrofluorination and nucleophilic addition-elimination reaction to generate a polymer with an enol structure, and then washing, precipitating and purifying a reaction product; and (2) re-dissolving by using an organic solvent, then forming a film by using a tape casting method, and carrying out ketone-enol tautomerization reaction in the film forming process of the tape casting method to finally prepare the polyvinylidene fluoride based ferroelectric polymer film. According to the effective modification and preparation method disclosed by the invention, an enol structure is promoted to be converted into a more stable ketone structure through a ketone-enol tautomerization reaction by utilizing a high-temperature environment in a film forming process, so that C = O double bonds are introduced into a polymer chain, and the piezoelectric property of the polymer is remarkably enhanced.

The invention discloses a high-solid-content MIL-101 (Fe) / PIM-1 mixed matrix membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The preparation method comprises the following steps: firstly, dissolving an iron source in a PIM-1 polymer solution to form a homogeneous membrane casting solution; forming the obtained membrane casting solution, and removing the solvent to obtain a PIM-1 / Fe (II) composite substrate containing Fe (III); then, the substrate is alternately immersed in a terephthalic acid methanol solution and a ferric salt methanol solution, and MIL-101 (Fe) is generated in the polymer matrix through in-situ limited crystallization by layer-by-layer limited crystallization. According to the method, the problem of interfacial compatibility between the MOF filler and the polymer matrix is effectively solved, and high loading capacity (up to 52.9 wt.%) of MIL-101 (Fe) is realized without agglomeration. Meanwhile, the membrane has excellent COplasticizing resistance and long-term operation stability, and has a wide application prospect in the fields of carbon capture and the like.

The present invention generally relates to a process for fabricating a reduced graphene oxide (rGO)-based antifouling marine coating is disclosed. The process begins with preparing a dispersed graphene oxide solution, followed by chemical reduction using hydrazine hydrate at 90-95° C. for 3 hours to form a dispersed rGO solution. This solution is then washed, filtered, and sonicated for 6 hours to ensure stability. A polymer solution is prepared by dissolving 40-50 wt % epoxy resin in acetone at 50° C. The antifouling composite is then formed by combining the rGO solution, 10-15 wt % zinc oxide nanoparticles, and 1-5 wt % carbon nanotubes with the polymer solution, followed by 6 hours of sonication at room temperature. Finally, the resulting composite material is applied to a substrate as a coating using spraying, brushing, dipping, or spin coating. This coating offers a promising solution for preventing biofouling on marine structures.

The invention discloses a mixed matrix membrane for efficient oxygen and nitrogen separation and a preparation method and application thereof. The mixed matrix membrane comprises a polymer continuous phase and an MOF filler uniformly dispersed in the polymer continuous phase, the MOF filler can separate nitrogen and oxygen, and the surface of the MOF filler is modified by the silane coupling agent, so that the MOF filler is well compatible with a polymer, and the oxygen-nitrogen separation effect is improved. The polymer solution and the MOF filler dispersion liquid are mixed, the mixed matrix membrane is prepared through the non-solvent induced phase separation method, and the method has the advantages of being simple in reaction condition, high in efficiency, easy to amplify and the like and has wide engineering prospects.

The invention relates to the field of optical thin films, in particular to a preparation method of an optical diffusion film. A preparation method of an optical diffusion film comprises the following steps: uniformly mixing a curing agent and polydimethylsiloxane, curing, and then carrying out oxygen plasma treatment and room temperature aging treatment to obtain a polydimethylsiloxane flat plate; dissolving PET particles and PMMA particles in a solvent to obtain a polymer solution; and placing a polydimethylsiloxane flat plate above the polymer solution, and standing to obtain the optical diffusion film. According to the application, PMMA is used as a high glass transition temperature component to be blended with PET, so that the overall glass transition temperature of a blending system is improved, and the practicability of the optical diffusion film in a high-temperature environment is improved; strong scattering is provided through the refractive index difference between air holes and a polymer phase, and a refractive index gradient is formed by using the refractive index difference between PET and PMMA, so that a secondary scattering interface is formed, and light absorption is reduced and high transmittance is maintained while high haze is ensured.

The invention discloses a preparation method of a composite slow-release carbon source, which comprises the following steps: preparing an inner core: uniformly dry-mixing lignin powder and a quick-acting carbon source, and adding a first binder to prepare inner core particles; middle layer wrapping: alternately spraying a second binder and middle layer coating powder until the middle layer is completely wrapped to obtain double-layer particles; outer layer wrapping: alternately spraying a third binder and outer layer coating powder until the outer layer is completely wrapped to obtain three layers of particles; and spraying a biodegradable polymer solution on the surfaces of the three layers of particles to form a coating film. Through the three-layer structural design of the quick start layer, the stable maintenance layer and the long-acting guarantee layer, accurate matching of carbon source release and microbial metabolism requirements is realized. The outer-layer quick-acting carbon source quickly starts microbial activity, the middle layer provides stable and continuous carbon source supply, and the inner core ensures the tail-section treatment effect. The sequential release mechanism effectively avoids burst release waste of the carbon source, so that the utilization rate of the carbon source is greatly improved.

The invention belongs to the technical field of gas membrane separation technologies and catalytic materials, and particularly relates to a ZSM-12 molecular sieve-based separation membrane, a preparation method and application thereof, and a reaction separation device using the separation membrane. The preparation method comprises the following steps: mixing and stirring a PEI polymer solution and a ZSM-12 molecular sieve to obtain a ZSM-12PEI membrane casting solution, scraping the ZSM-12PEI membrane casting solution on a glass plate pasted with a base membrane at a constant speed by using a 200 [mu] m scraper, and then drying in a constant-temperature and constant-humidity chamber at the temperature of 30 DEG C and the humidity of 40RH for 24 hours. The reaction separation device disclosed by the invention is designed in a manner that four stages of chambers are connected in series, so that the CO purity can be purified to 99% through step-by-step enrichment. CO is timely separated to avoid secondary oxidation, and the utilization rate of the catalyst is greatly improved.

The present invention discloses a method for preparing a high-ionic conductivity cement-based structured electrolyte and the electrolyte, comprising: mixing a polymer solution, cement, and fine sand to obtain a polymer-cement slurry; subjecting the polymer-cement slurry to low-temperature, sealed curing, and then allowing it to stand at room temperature to obtain a cement-based structured electrolyte. The present invention utilizes a controlled phase separation technique to enable elastic phase separation of the polymer network prior to cement hydration. During the hydration process, the cement adaptively forms the backbone of the polymer network, resulting in a good interface between the two, capable of forming continuous, high-conductivity ion channels. The preparation process is simple to operate and highly reproducible.

The invention discloses a preparation method and application of a multifunctional dynamic covalent polymer aerogel material capable of being directly reconstructed. The method comprises the following steps: obtaining a prepolymer with a certain molecular weight by using at least two reaction monomers, completing a sol-gel process by using a compound containing three or more reactive groups as a cross-linking agent, and drying to obtain the dynamic covalent polymer aerogel material. The aerogel material is heated to obtain a polymer solution, a new aerogel material is obtained after cooling, and new dynamic covalent polymer aerogel or aerogel fiber can be prepared in the process by utilizing the sol-gel reversible property; in addition, the aerogel can be placed in an original solvent to be directly reconstructed into new aerogel. According to the method, the problem that traditional aerogel is difficult to reprocess is solved, the material preparation process is simple and economical, the aerogel material can be prepared and reconstructed on a large scale by utilizing a normal-pressure drying technology, and the method is suitable for commercial production.

The invention relates to the technical field of water treatment membranes, in particular to a polyamide reverse osmosis membrane with anti-fouling performance and a preparation method of the polyamide reverse osmosis membrane. The polyamide reverse osmosis membrane is prepared by the method. The method comprises the following steps: S1, preparing a first diaphragm; and S2, immersing the first membrane into an amino compound solution for interfacial polymerization reaction, and then cleaning to obtain a second membrane, namely the polyamide reverse osmosis membrane. And S3, coating the second membrane with an alcohol polymer solution, and then carrying out second drying treatment to obtain the polyamide reverse osmosis membrane containing the coating. According to the invention, the polyamide reverse osmosis membrane with remarkable anti-pollution performance on cationic pollutants can be prepared.

The invention discloses a one-dimensional photonic crystal photoelectric sensor of an optical Tamm state and surface plasmon. The one-dimensional photonic crystal photoelectric sensor comprises a substrate layer, a DBR structure layer and a silver film layer which are connected in sequence. The one-dimensional photonic crystal photoelectric sensor does not need a specific incident angle, the forming condition is relatively simple, the application of a strong coupling system in the fields of sensing, fluorescent light field regulation and the like is realized, the one-dimensional photonic crystal photoelectric sensor can be used for detecting trace samples such as macromolecular solutions and biological reagents, and the sensing performance is greatly improved.

A method for producing a solid polymer according to the present invention includes a step for preparing a polymer solution containing a polymer in which a crosslinked structure of a water-absorbent resin has been cleaved, and a step for obtaining a polymer dispersion, in which a solid polymer is dispersed, by bringing the polymer solution into contact with a solvent that poorly dissolves the polymer to cause precipitation of the polymer.

Provided herein are metal-organic framework nanoparticles including a nucleic acid-based therapeutic agent and methods of making the same. The method includes adding the nucleic acid-based therapeutic agent to an imidazole solution to form a therapeutic agent containing solution, adding a polymer solution to the therapeutic agent containing solution to form an electrostatic complex solution, adding a zinc solution to the electrostatic complex solution to form a metal-organic framework nanoparticle precursor solution, and incubating the metal-organic framework nanoparticle precursor solution to form the metal-organic framework nanoparticles comprising the nucleic-acid based therapeutic agent. Dosage forms and metal-organic framework nanoparticle solutions including the metal-organic framework nanoparticles including a nucleic acid-based therapeutic agent are also provided.

The invention discloses a polymer solution devolatilization device which comprises a first inlet assembly and a second inlet assembly, a first devolatilization internal part and a second devolatilization internal part are arranged at the outlet end of the first inlet assembly and the outlet end of the second inlet assembly respectively, and a plurality of Venturi type through holes are formed in the outlet faces of the two devolatilization internal parts. A low-viscosity polymer solution is fed from the first inlet assembly, is discharged after promoting removal of volatile components through the first devolatilization internal part, and falls on the outer surface of the second devolatilization internal part to form a film, so that the devolatilization time is prolonged, and the mass transfer area is increased; a high-viscosity polymer solution is fed from the second inlet assembly, and volatile component removal is promoted through the action of the second devolatilization internals. The device can selectively switch feeding according to the viscosity of the polymer solution, is suitable for devolatilization of the polymer solution with a wide viscosity range, can effectively solve the problem of frequent replacement of devolatilization internals during production switching of a plate number with large viscosity difference, ensures long-period stable operation of the device, and is high in devolatilization efficiency, and the obtained polymer is low in volatile component content.

This invention discloses a multifunctional composite flexible fabric with multiple functions including radiative cooling, energy harvesting, hydrophobicity, and antibacterial properties. The composite flexible fabric consists of several electrospun fiber layers, each formed sequentially by electrospinning in a top-to-bottom order. It includes at least two polymer electrospun fiber layers and at least one nanofunctional electrospun fiber layer, wherein the nanofunctional electrospun fiber layer serves as an intermediate sandwich layer, forming a sandwich structure with the polymer electrospun fiber layers located on the upper and lower surfaces. This invention also discloses a method for preparing this flexible fabric, using electrospinning to prepare it by electrospinning a PVDF or related polymer solution and a polymer solution modified with functional nanoparticles. This preparation method can effectively control the morphology of the nanofibers and the functions of the nanoparticles, enabling a synergistic effect between the functional nano-scattering particles and the nanofibers, resulting in an integrated functional fabric with thermal management, energy harvesting, and antibacterial properties.

The invention belongs to the field of high-performance materials, and discloses a high-thermal-conductivity PBO fiber and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing a PBO polymer solution with a conventional molecular weight; (2) preparing an ultra-high molecular weight PBO polymer solution; (3) mixing the two PBO polymer solutions in a double-screw extruder according to a certain proportion to obtain a PBO spinning solution; (4) preparing as-spun PBO fibers by adopting a dry-wet liquid crystal spinning process and a condensed state structure regulation and control means; and (5) washing, drying, oiling and winding the as-spun PBO fiber to obtain the high-thermal-conductivity PBO fiber. According to the method, a small amount of the ultra-high molecular weight PBO polymer is added into the conventional spinning solution, the heat conduction performance of the PBO fiber is remarkably improved through the induced orientation crystallization effect of an ultra-high molecular weight PBO long chain, and the method has good application prospects in the field of high-power radio frequency microwave circuits with high requirements for heat dissipation capacity.

The invention discloses a method for measuring the molar concentration of nano-particles. The method comprises the following steps: diluting a nano-particle suspension with a high-molecular polymer solution or dispersing nano-particle powder into the high-molecular polymer solution; transferring the suspension liquid to a spacing net on the side of a sample pool in an electrophoresis tank; nano-particles migrate from the sample pool to the buffer pool under the driving of the electric field and are uniformly distributed on the spacing net in a single-particle manner; performing single-particle imaging on the spacing net by using an optical microscope; and counting the number of the nanoparticles in the image so as to measure the molar concentration of the nanoparticles in the sample. The method can be used under the condition that the properties of the nanoparticles are unknown or no standard substance exists, the detection object has no additional condition, and the accuracy is high.

The invention relates to the technical field of energy storage materials, and provides a composite solid polymer electrolyte membrane and a preparation method thereof.The composite solid polymer electrolyte membrane is prepared through the steps that a polymer matrix serves as a matrix, a polar solvent is adopted for dissolving to form a pure polymer solution, then lithium salt and nematic phase liquid crystal E7 are added, a chiral dopant can also be added, uniform printing slurry is formed, and the composite solid polymer electrolyte membrane is obtained through 3D printing. And carrying out hot pressing treatment to prepare the composite solid polymer electrolyte membrane. The electrolyte membrane prepared by the invention has a controllable porous structure, a high dielectric constant and excellent piezoelectricity and energy storage performance, complex structures such as a three-dimensional grid and a porous structure can be directly printed, and the thickness and shape of the membrane can be accurately controlled by adjusting parameters such as a printing path, a layer height and filling density; the method is very suitable for the requirements of rapid customization of product shapes and sizes in the fields of flexible electronics, wearable equipment and the like. The invention also provides an application of the composite solid polymer electrolyte membrane prepared by the method in an energy storage device.

The invention discloses a method for preparing ultra-low density rigid ceramic thermal insulation tiles, which belongs to the technical field of high-performance thermal protection material preparation. The method comprises the following steps: adding ceramic fibers into water and mixing them evenly to obtain ceramic fiber slurry; mixing sintering aid powder and polymer solution evenly to obtain a sintering aid mixture; stirring the ceramic fiber slurry, and then adding the sintering aid mixture inwardly in an intermittent spraying manner, and continuing to stir after the addition is completed to obtain thermal insulation tile slurry; transferring the thermal insulation tile slurry to a filtering tool, and after standing and settling, removing the clear liquid above the precipitated deposit from the top until the precipitated deposit is exposed to the water surface, and then filtering out excess water from the filter screen below the filtering tool to obtain a thermal insulation tile wet blank; drying the thermal insulation tile wet blank to obtain a thermal insulation tile dry blank; loading the dried thermal insulation tile into a sealed ceramic box, and then transferring it to a muffle furnace for sintering to obtain an ultra-low density rigid ceramic insulation tile.

The invention relates to the technical field of hygroscopic hydrogel preparation and atmospheric water collection, in particular to hygroscopic hydrogel as well as a preparation method and application thereof, and the preparation method comprises the following steps: dissolving a hygroscopic polymer with a complexing group in water, then adding a material with thermal response hydrophilic-hydrophobic conversion, stirring and dissolving to obtain a polymer solution, and then adding the polymer solution into a reaction kettle to obtain the hygroscopic hydrogel. Adding a nano-porous material with complexing sites into the polymer solution, and carrying out primary crosslinking on the complexing groups on the gel main body material and the complexing sites on the nano-porous material with the complexing sites to form a uniformly dispersed gel precursor solution; hygroscopic salt is added into the gel precursor solution for gelation, the hierarchical pore hygroscopic hydrogel with a macroporous structure and nano micropores is obtained after freeze-drying, and a hydrogel network with rich hierarchical pores is prepared, so that the water vapor adsorption-desorption kinetics and water collection performance are greatly improved.

The invention relates to the field of film engineering, in particular to a conductive film and a preparation method thereof. The preparation method comprises the following steps: dissolving a water-soluble high-molecular polymer in a solvent to obtain a polymer solution, dissolving a polyanion electrolyte in the polymer solution, and swelling to obtain a matrix; and obtaining a conductive solution containing the water-soluble conductive polymer, adding the conductive solution into the matrix, and stirring until the conductive solution is homogenized to obtain the spinning solution. And the content of each component in the spinning solution is moderate. And performing electrostatic spinning by using the spinning solution to form the conductive film on the receiver. The conductive thin film is prepared in an electrostatic spinning mode, and manufacturing of the large-area flexible conductive thin film with the micro-nano-scale thickness is achieved. The polyanion electrolyte is added into the spinning solution, so that the binding force between the electroactive component and the carrier polymer is greatly improved, a mechanical phase and an electrical phase form a bicontinuous phase separation state, a gel spinning precursor is formed and drafted into filaments from a needle tip, and a uniform gel-like conductive film is formed on the surface of the receiver.

A solvent-based plastic recycling method that removes color and produces plastic polymers substantially free of exogenous colorants. The method comprises selecting a solvent that selectively dissolves an individual polymer and has low solubility of colorants and decomposition products of the colorants. A combined precipitator and piston device is used to precipitate the polymer solution and mechanically remove the solvent from the precipitate before thermal drying. An adsorption bed is used to clean the recovered solvent as it is recycled to the process.

The present invention relates to a process for purifying a plastic feedstock comprising polypropylene, involving:a) dissolving the plastic feedstock in a dissolution solvent comprising a hydrocarbon-based compound having a boiling point of between −15° C. and 100° C., at a dissolution temperature of between 150° C. and 250° C., a dissolution pressure of between 1.0 and 18.0 MPa absolute, to obtain a crude polymer solution;b) purifying the crude polymer solution, comprising:b1) separation of the insoluble matter;b2) washing, with a dense solution;b3) extraction, with an extraction solvent; and / orb4) adsorption of the impurities; and thenc) solvent-polymer separation, using a supercritical separation section, at a temperature of between 160 and 300° C. and a pressure of between 2.7 and 10.0 MPa absolute, followed by at least one solvent recovery section, to obtain purified polypropylene.

The invention discloses a preparation method of a graphene composite coating with multifunctional characteristics, which comprises the following steps: processing a substrate, coating a carbon source polymer solution on the surface of a substrate material to form a polymer liquid film, and treating a polymer to form a polymer film; laser induction: carbonizing the polymer film by using laser to form a laser-induced graphene (LIG) coating; functional particles are added, nanoparticles are doped on the surface of the LIG coating in a coating mode, and a composite structure is formed; integrating the multifunctional coating, and forming the graphene-based multifunctional composite coating through post-treatment.

The invention relates to the technical field of gratings, and discloses a polarization holographic two-dimensional grating and a preparation method thereof, an optical waveguide and a two-dimensional pupil expansion method, and the method comprises the steps: forming a light-operated orientation layer film on a substrate; exposing the light-operated orientation layer film to obtain an oriented light-operated orientation layer; coating the photo-alignment layer with a liquid crystal polymer solution mixed with a chiral agent and an initiator to form a liquid crystal polymer film; and curing the liquid crystal polymer film to obtain the polarization holographic two-dimensional grating. Therefore, a two-dimensional grating can be directly prepared without depending on multi-area grating combination to realize bidirectional expansion of light beams, the view field range is expanded, the technological process is simplified, the manufacturing complexity and the preparation cost are reduced, and meanwhile, the consistency and high performance of mass production are guaranteed; in addition, the integrated design of the two-dimensional grating can avoid the problem of uneven brightness caused by traditional multi-assembly splicing, the overall brightness uniformity and the imaging display effect are effectively improved, and a low-cost and high-performance implementation path is provided for optical waveguide two-dimensional pupil expansion.