High-performance functional film and manufacturing method thereof

Abstract

The invention belongs to the field of films, and particularly relates to a high-performance functional film and a manufacturing method thereof.The high-performance functional film comprises a base layer, an anti-blue-light layer, a quantum dot mold layer, a heat dissipation layer and a protective layer, the anti-blue-light layer is arranged on the top of the base layer, the quantum dot mold layer is arranged on the top of the anti-blue-light layer, the heat dissipation layer is arranged on the top of the quantum dot mold layer, and the protective layer is arranged on the top of the quantum dot mold layer. A protection layer is arranged on the top of the quantum dot mold layer; the base layer is a polyethylene terephthalate film, and the polyethylene terephthalate film has good mechanical properties and chemical stability and can provide a stable supporting structure for the functional film. The anti-blue-light layer is prepared by mixing anti-blue-light nano-particles and acrylic resin, wherein the anti-blue-light nano-particles can effectively absorb and reflect blue light. The display screen is reasonable in design, the functions of blue light prevention, high color rendering, efficient heat dissipation and the like are integrated through multi-layer structural design and specific material combination, the manufacturing process is accurate and controllable, and the comprehensive performance of the display screen can be stably and reliably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of membranes, in particular to a high-performance functional film and a manufacturing method thereof. BACKGROUND

[0002] With the continuous development of science and technology, functional films have been widely used in many fields such as electronics, optics, energy, etc.

[0003] However, the existing functional films still have certain limitations in performance, for example, their mechanical strength is insufficient, and they are prone to damage, deformation and other problems when subjected to external forces, affecting their use effect and service life; in terms of barrier performance, the barrier ability of some small molecule gases, liquids and dust particles is limited, and it cannot meet some application scenarios with high environmental requirements.

[0004] At the same time, the existing functional films are relatively single in functionality, and it is difficult to meet multiple different functional requirements at the same time, such as good optical performance, electrical performance and thermal stability, etc. Especially in the field of optical display, the color performance, light-emitting efficiency and other performances of traditional functional films are difficult to meet the display requirements of high definition and high color saturation, and lack of blue light protection, efficient heat dissipation and other functions, therefore we propose a high-performance functional film and a manufacturing method thereof to solve the above problems. SUMMARY

[0005] The purpose of the present application is to solve the problems existing in the prior art and provide a high-performance functional film and a manufacturing method thereof.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] A high-performance functional film, comprising a base layer, a blue light protection layer, a quantum dot model layer, a heat dissipation layer and a protective layer, the top of the base layer is provided with the blue light protection layer, the top of the blue light protection layer is provided with the quantum dot model layer, the top of the quantum dot model layer is provided with the heat dissipation layer, and the top of the quantum dot model layer is provided with the protective layer.

[0008] The base layer is a polyethylene terephthalate film, which has good mechanical properties and chemical stability and can provide a stable support structure for the functional film.

[0009] The blue light protection layer is made of blue light protection nanoparticles mixed with acrylic resin, wherein the blue light protection nanoparticles can effectively absorb and reflect blue light, reducing the harm of blue light to the eyes, and the acrylic resin acts as an adhesive to uniformly disperse and firmly adhere the blue light protection nanoparticles on the base layer.

[0010] The quantum dot mold layer is made by mixing quantum dots and a polymer resin, the quantum dots have excellent light emitting properties and can significantly improve the color performance of the display screen, and the polymer resin plays a role in fixing and protecting the quantum dots.

[0011] The heat dissipation layer is made of graphene nanosheets and heat-conducting silica gel, the graphene nanosheets have ultra-high thermal conductivity and can quickly conduct heat, and the heat-conducting silica gel has good flexibility and adhesion, so that the heat dissipation layer can be closely attached to the quantum dot mold layer to achieve efficient heat dissipation.

[0012] The protective layer is a transparent polyurethane film, which has good wear resistance and light transmission and can effectively protect the internal structure of the functional film without affecting the display effect of the display screen.

[0013] Preferably, the thickness of the base layer is 10-20 microns, the thickness of the anti-blue light layer is 5-8 microns, and the thickness of the quantum dot mold layer is 8-12 microns.

[0014] Preferably, the thickness of the heat dissipation layer is 6-10 microns, and the thickness of the protective layer is 5-10 microns.

[0015] A manufacturing method of a high-performance functional film, comprising the following steps:

[0016] S1: Base layer preparation: select a polyethylene terephthalate (PET) film with a thickness of 10-20 microns as the base layer, clean the surface of the PET film, ultrasonically wash the PET film with deionized water and ethanol in turn, the cleaning time is 10-20 minutes, remove the dust, oil stains and other impurities on the surface of the PET film, then dry the cleaned PET film at 60-80℃ for 30-60 minutes to obtain a clean and dry base layer;

[0017] S2: Anti-blue light layer preparation: disperse rare earth-doped strontium titanate nanoparticles in ethyl acetate to prepare a nanoparticle dispersion liquid with a mass concentration of 15-20%; according to the ratio of 10-15% of the mass fraction of anti-blue light nanoparticles and 85-90% of the mass fraction of acrylic resin, mix the nanoparticle dispersion liquid and acrylic resin at 40-50℃ with a stirring speed of 300-500 revolutions per minute for 50-70 minutes to form a uniform mixed solution, and then spray the mixed solution onto the base layer to form an anti-blue light layer;

[0018] S3: Quantum dot mold layer preparation: CdSe / ZnS core-shell structure quantum dots are dispersed in organic solvent toluene to prepare a quantum dot dispersion liquid with a mass concentration of 20-30%; according to the proportion of quantum dot mass fraction 8-12% and polyvinyl alcohol (PVA) mass fraction 88-92%, the quantum dot dispersion liquid and PVA are mixed and stirred at 50-60°C, the stirring speed is 400-600 revolutions / minute, the stirring time is 40-60 minutes, and a uniform mixed slurry is formed. The mixed slurry is coated on the surface of the anti-blue light layer to form a quantum dot mold layer;

[0019] S4: Preparation of heat dissipation layer: graphene nanosheets are added to dimethylbenzene and ultrasonically dispersed for 30-40 minutes to prepare a graphene dispersion liquid with a mass concentration of 10-15%; according to the proportion of graphene nanosheet mass fraction 15-20% and heat-conducting silica gel mass fraction 80-85%, the graphene dispersion liquid and heat-conducting silica gel are mixed and stirred at 60-70°C, the stirring speed is 600-800 revolutions / minute, the stirring time is 30-50 minutes, and a uniform heat dissipation layer slurry is obtained. The heat dissipation layer slurry is uniformly coated on the surface of the quantum dot mold layer by the scraping method to form a heat dissipation layer.

[0020] S5: Preparation of protective layer: a transparent polyurethane film with a thickness of 5-10 microns is selected as the protective layer, and the polyurethane film is attached to the surface of the heat dissipation layer by hot pressing, the hot pressing temperature is 100-120°C, the hot pressing pressure is 0.5-1.0 megapascal, and the hot pressing time is 1-3 minutes, to obtain a high-performance functional film.

[0021] Preferably, the mixed solution is uniformly sprayed on the surface of the base layer by the spraying method, the spraying pressure is 0.3-0.5 megapascal, and then the sprayed base layer is dried and cured at 70-85°C for 40-60 minutes, the acrylic resin is cured, and the anti-blue light layer is firmly attached to the base layer.

[0022] Preferably, the mixed slurry is coated on the surface of the anti-blue light layer by the spin coating method, the spin coating speed is 1500-2000 revolutions / minute, the spin coating time is 30-40 seconds, and then the coated base layer is dried and cured at 70-80°C for 30-40 minutes to form a quantum dot mold layer.

[0023] Preferably, the slurry is uniformly coated on the surface of the quantum dot mold layer by the scraping method, the thickness is controlled to be 6-10 microns, and then dried and cured at 80-90°C for 50-70 minutes, the heat-conducting silica gel is cured, and the heat dissipation layer is stably connected to the quantum dot mold layer.

[0024] Preferably, the transparent polyurethane film with a thickness of 5-10 microns is selected as the protective layer, and through the hot pressing process, the polyurethane film is tightly attached to the surface of the heat dissipation layer by the molecular interaction under the temperature of 100-120 DEG C and the pressure of 0.5-1.0 MPa for 1-3 minutes, and finally a complete high-performance functional film is formed.

[0025] The beneficial effects of the present application are:

[0026] 1. Through the reasonable combination of the base layer, the blue light prevention layer, the quantum dot model layer, the heat dissipation layer and the protective layer, the integration of multiple functions such as blue light prevention, high color rendering and high-efficiency heat dissipation is realized, which can effectively improve the comprehensive performance of the display screen and meet the user's demand for multiple functions of the display screen.

[0027] 2. The base layer provides stable support, the blue light prevention layer effectively blocks blue light, the quantum dot model layer improves color performance, the heat dissipation layer realizes rapid heat dissipation, and the protective layer protects the internal structure, and each layer cooperates and plays a synergistic role.

[0028] 3. In terms of material selection, the acrylic resin of the blue light prevention layer and the polyvinyl alcohol of the quantum dot model layer are all high molecular materials with good environmental protection performance, non-toxic and harmless, which will not cause harm to the environment and human health during production and use. The graphene nanosheet and the heat-conducting silicone used in the heat dissipation layer also belong to green and environmentally friendly materials, which meet the requirements of modern industry for sustainable development and ensure the safety of the product from production to application throughout the life cycle.

[0029] 4. The blue light prevention function can effectively reduce the fatigue and damage to the eyes caused by long-time screen watching, and protect the user's vision health. The high color rendering performance makes the display picture color more vivid and realistic, providing users with an immersive visual experience. The high-efficiency heat dissipation performance can avoid problems such as display effect degradation and device running lag caused by overheating of the screen, and ensure stable operation of the device, thereby improving the user's use experience and satisfaction in all aspects.

[0030] 5. The stable and efficient heat dissipation performance can reduce the working temperature of the display screen and related electronic components, reduce the aging and damage of the components caused by high temperature, and thus prolong the overall service life of the electronic device. At the same time, the solid and wear-resistant protective layer can effectively resist external physical damage, further protect the internal structure of the functional film and the screen of the electronic device, and reduce the cost of equipment maintenance and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 An explosion stereoscopic structure diagram of a high-performance functional film according to the present application is shown in the figure.

[0032] In the figure: 1, base layer; 2, blue light prevention layer; 3, quantum dot model layer; 4, heat dissipation layer; 5, protective layer. DETAILED DESCRIPTION

[0033] The application will be further described below in conjunction with the accompanying drawings. Figure 1 The application will be further described below in conjunction with the accompanying drawings.

[0034] The application discloses a high-performance functional film and a manufacturing method thereof.

[0035] Embodiment one

[0036] With reference to Figure 1 A manufacturing method of a high-performance functional film, comprising the following steps:

[0037] Base layer preparation: a polyethylene terephthalate (PET) film with a thickness of 12 microns is selected as a base layer, and the PET film is sequentially cleaned by ultrasonic waves using deionized water and ethanol, the cleaning time being 12 minutes, and then the cleaned PET film is dried at 65°C for 40 minutes to obtain a clean and dry base layer.

[0038] Preparation of a blue light protection layer: rare earth doped strontium titanate nanoparticles are dispersed in ethyl acetate to prepare a nanoparticle dispersion liquid with a mass concentration of 16%; the nanoparticle dispersion liquid and an acrylic resin are mixed by stirring at 42°C according to a proportion of 12% of the mass fraction of the blue light protection nanoparticles and 88% of the mass fraction of the acrylic resin, the stirring speed being 350 revolutions per minute and the stirring time being 60 minutes, to form a uniform mixed solution. The mixed solution is uniformly sprayed on the surface of the base layer by using a spraying method, the spraying pressure being 0.35 MPa, and then the sprayed base layer is dried and solidified at 75°C for 50 minutes, so that the blue light protection layer is firmly attached to the base layer.

[0039] Preparation of a quantum dot mold layer: CdSe / ZnS core-shell structure quantum dots are dispersed in an organic solvent toluene to prepare a quantum dot dispersion liquid with a mass concentration of 22%; the quantum dot dispersion liquid and polyvinyl alcohol (PVA) are mixed by stirring according to a proportion of 9% of the mass fraction of the quantum dots and 91% of the mass fraction of the PVA, the stirring speed being 450 revolutions per minute and the stirring time being 50 minutes, to form a uniform mixed slurry. The mixed slurry is coated on the surface of the blue light protection layer by using a spin coating method, the spin coating speed being 1600 revolutions per minute and the spin coating time being 35 seconds, and then the coated base layer is dried and solidified at 72°C for 35 minutes to form a quantum dot mold layer.

[0040] Preparation of the heat dissipation layer: graphene nanosheets were added to dimethylbenzene and ultrasonically dispersed for 32 minutes to prepare a graphene dispersion liquid with a mass concentration of 12%; the graphene dispersion liquid and the heat-conducting silica gel were mixed at 63°C at a stirring speed of 650 revolutions / minute for 40 minutes at a ratio of 16% of the mass fraction of graphene nanosheets and 84% of the mass fraction of heat-conducting silica gel to obtain a uniform heat dissipation layer slurry. The heat dissipation layer slurry was uniformly coated on the surface of the quantum dot mold layer by using a doctor blade method, and the thickness was controlled to be 7 microns. Subsequently, the heat dissipation layer was dried and solidified at 82°C for 60 minutes to stably connect the heat dissipation layer to the quantum dot mold layer.

[0041] Preparation of the protective layer: a transparent polyurethane film with a thickness of 6 microns was selected as the protective layer, and the polyurethane film was attached to the surface of the heat dissipation layer by hot pressing at a hot pressing temperature of 105°C, a hot pressing pressure of 0.6 megapascals, and a hot pressing time of 1.5 minutes to obtain a high-performance functional film.

[0042] Example Two

[0043] Reference Figure 1 A method for manufacturing a high-performance functional film, comprising the following steps:

[0044] Preparation of the base layer: a polyethylene terephthalate (PET) film with a thickness of 18 microns was selected as the base layer, and the PET film was ultrasonically cleaned with deionized water and ethanol in sequence, and the cleaning time was 18 minutes. Then, the cleaned PET film was dried at 75°C for 50 minutes to obtain a clean and dry base layer.

[0045] Preparation of the anti-blue light layer: rare earth-doped strontium titanate nanoparticles were dispersed in ethyl acetate to prepare a nanoparticle dispersion liquid with a mass concentration of 18%; the nanoparticle dispersion liquid and the acrylic resin were mixed at 48°C at a stirring speed of 450 revolutions / minute for 65 minutes at a ratio of 14% of the mass fraction of anti-blue light nanoparticles and 86% of the mass fraction of acrylic resin to form a uniform mixed solution. The mixed solution was uniformly sprayed on the surface of the base layer by using a spraying method, and the spraying pressure was 0.45 megapascals. Then, the sprayed base layer was dried and solidified at 80°C for 55 minutes to firmly adhere the anti-blue light layer to the base layer.

[0046] Quantum dot die layer preparation: CdSe / ZnS core-shell structure quantum dots are dispersed in organic solvent toluene to prepare a quantum dot dispersion liquid with a mass concentration of 28%; quantum dots and PVA are mixed at a ratio of 11% quantum dot mass fraction and 89% PVA mass fraction at 58°C with a stirring speed of 550 rpm for 55 minutes to form a uniform mixed slurry. The mixed slurry is coated on the surface of the blue light prevention layer by spin coating at a speed of 1900 rpm for 38 seconds, and then the coated base layer is dried and cured at 78°C for 38 minutes to form a quantum dot die layer.

[0047] Heat dissipation layer preparation: graphene nanosheets are added to dimethylbenzene and ultrasonically dispersed for 38 minutes to prepare a graphene dispersion liquid with a mass concentration of 14%; graphene dispersion liquid and heat-conducting silicone are mixed at a ratio of 18% graphene nanosheet mass fraction and 82% heat-conducting silicone mass fraction at 68°C with a stirring speed of 750 rpm for 45 minutes to obtain a uniform heat dissipation layer slurry. The heat dissipation layer slurry is uniformly coated on the surface of the quantum dot die layer by blade coating, with a thickness controlled at 9 microns, and then dried and cured at 88°C for 65 minutes to stably connect the heat dissipation layer on the quantum dot die layer.

[0048] Protective layer preparation: a transparent polyurethane film with a thickness of 8 microns is selected as the protective layer, and the polyurethane film is attached to the surface of the heat dissipation layer by hot pressing, with a hot pressing temperature of 115°C, a hot pressing pressure of 0.8 MPa, and a hot pressing time of 2.5 minutes to obtain a high-performance functional film.

[0049] Example Three

[0050] Reference Figure 1 A method for manufacturing a high-performance functional film, comprising the following steps:

[0051] Base layer preparation: a polyethylene terephthalate (PET) film with a thickness of 10 microns is selected as the base layer, and the PET film is sequentially cleaned by ultrasonic wave using deionized water and ethanol for 10 minutes, and then the cleaned PET film is dried at 60°C for 30 minutes to obtain a clean and dry base layer.

[0052] Preparation of the anti-blue light layer: Rare earth doped strontium titanate nanoparticles are dispersed in ethyl acetate to prepare a nanoparticle dispersion with a mass concentration of 15%; the nanoparticle dispersion and acrylic resin are mixed at 40°C with stirring at a speed of 300 revolutions per minute for 50 minutes in a ratio of 10% by mass of the anti-blue light nanoparticles and 90% by mass of the acrylic resin to form a uniform mixed solution. The mixed solution is uniformly sprayed onto the surface of the base layer using a spraying method at a spraying pressure of 0.3 MPa, and then the sprayed base layer is dried and cured at 70°C for 40 minutes to firmly adhere the anti-blue light layer to the base layer.

[0053] Preparation of the quantum dot mask layer: CdSe / ZnS core-shell structure quantum dots are dispersed in an organic solvent, toluene, to prepare a quantum dot dispersion with a mass concentration of 20%; the quantum dot dispersion and PVA are mixed at 50°C with stirring at a speed of 400 revolutions per minute for 40 minutes in a ratio of 8% by mass of the quantum dots and 92% by mass of the PVA to form a uniform mixed slurry. The mixed slurry is coated onto the surface of the anti-blue light layer using a spin coating method at a spin coating speed of 1500 revolutions per minute for 30 seconds, and then the coated base layer is dried and cured at 70°C for 30 minutes to form the quantum dot mask layer.

[0054] Preparation of the heat dissipation layer: Graphene nanosheets are added to dimethylbenzene and ultrasonically dispersed for 30 minutes to prepare a graphene dispersion with a mass concentration of 10%; the graphene dispersion and heat-conducting silicone are mixed at 60°C with stirring at a speed of 600 revolutions per minute for 30 minutes in a ratio of 15% by mass of the graphene nanosheets and 85% by mass of the heat-conducting silicone to obtain a uniform heat dissipation layer slurry. The heat dissipation layer slurry is uniformly coated onto the surface of the quantum dot mask layer using a doctor blade method, with a thickness controlled at 6 microns, and then dried and cured at 80°C for 50 minutes to stably connect the heat dissipation layer to the quantum dot mask layer.

[0055] Preparation of the protective layer: A transparent polyurethane film with a thickness of 5 microns is selected as the protective layer, and the polyurethane film is attached to the surface of the heat dissipation layer by hot pressing at a temperature of 100°C, a pressure of 0.5 MPa, and a time of 1 minute to obtain the high-performance functional film.

[0056] Example Four

[0057] Reference Figure 1 A method for manufacturing a high-performance functional film, comprising the following steps:

[0058] Base layer preparation: a polyethylene terephthalate (PET) film with a thickness of 20 microns was selected as the base layer, and the PET film was sequentially cleaned with deionized water and ethanol by ultrasonic cleaning for 20 minutes. Then, the cleaned PET film was dried at 80°C for 60 minutes to obtain a clean and dry base layer.

[0059] Anti-blue light layer preparation: rare earth-doped strontium titanate nanoparticles were dispersed in ethyl acetate to prepare a nanoparticle dispersion liquid with a mass concentration of 20%. The nanoparticle dispersion liquid and acrylic resin were mixed at a ratio of 15% by mass of the anti-blue light nanoparticles and 85% by mass of the acrylic resin at 50°C with a stirring speed of 500 rpm for 70 minutes to form a uniform mixed solution. The mixed solution was uniformly sprayed on the surface of the base layer by spraying at a pressure of 0.5 MPa, and then the sprayed base layer was dried and cured at 85°C for 60 minutes to firmly adhere the anti-blue light layer to the base layer.

[0060] Quantum dot mold layer preparation: CdSe / ZnS core-shell structure quantum dots were dispersed in an organic solvent, toluene, to prepare a quantum dot dispersion liquid with a mass concentration of 30%. The quantum dot dispersion liquid and PVA were mixed at a ratio of 12% by mass of the quantum dots and 88% by mass of the PVA at 60°C with a stirring speed of 600 rpm for 60 minutes to form a uniform mixed slurry. The mixed slurry was coated on the surface of the anti-blue light layer by spin coating at a speed of 2000 rpm for 40 seconds, and then the coated base layer was dried and cured at 80°C for 40 minutes to form a quantum dot mold layer.

[0061] Heat dissipation layer preparation: graphene nanosheets were added to dimethylbenzene and ultrasonically dispersed for 40 minutes to prepare a graphene dispersion liquid with a mass concentration of 15%. The graphene dispersion liquid and heat-conducting silicone were mixed at a ratio of 20% by mass of the graphene nanosheets and 80% by mass of the heat-conducting silicone at 70°C with a stirring speed of 800 rpm for 50 minutes to obtain a uniform heat dissipation layer slurry. The heat dissipation layer slurry was uniformly coated on the surface of the quantum dot mold layer by doctor blade coating with a thickness of 10 microns, and then dried and cured at 90°C for 70 minutes to stably connect the heat dissipation layer to the quantum dot mold layer.

[0062] Protective layer preparation: a transparent polyurethane film with a thickness of 10 microns was selected as the protective layer, and the polyurethane film was attached to the surface of the heat dissipation layer by hot pressing at a temperature of 120°C, a pressure of 1.0 MPa, and a time of 3 minutes to obtain a high-performance functional film.

[0063] The high-performance functional film prepared in Examples 1-4 is subjected to performance testing, and the test items include blue light prevention rate, color rendering index (Ra), thermal resistance, light transmittance, and the test results are shown in the following table:

[0064] Example Blue light blocking rate (%) Color rendering index (Ra) Thermal resistance Transmittance (%) Example 1 82 92 0.25 93 Example 2 85 93 0.23 92 Example 3 80 91 0.28 94 Example 4 87 94 0.21 91

[0065] In the present application, through the reasonable combination of the base layer, the blue light prevention layer, the quantum dot model layer, the heat dissipation layer and the protective layer, the integration of multiple functions such as blue light prevention, high color rendering and high-efficiency heat dissipation is realized, which can effectively improve the comprehensive performance of the display screen, meet the user's demand for multi-function of the display screen, provide stable support through the base layer, effectively block blue light through the blue light prevention layer, improve color performance through the quantum dot model layer, realize rapid heat dissipation through the heat dissipation layer, and protect the internal structure through the protective layer. Each layer cooperates with each other and plays a synergistic role. In terms of material selection, the acrylic resin of the blue light prevention layer and the polyvinyl alcohol of the quantum dot model layer are high molecular materials with good environmental protection performance, non-toxic and harmless, which will not cause harm to the environment and human health in the production and use process. The graphene nanosheet and the heat-conducting silica gel used in the heat dissipation layer are also green and environmentally friendly materials, which meet the requirements of modern industry for sustainable development and ensure the safety of the product from production to application throughout its life cycle.

[0066] The blue light prevention function can effectively reduce the fatigue and damage to the eyes caused by long-time screen watching, and protect the user's visual health. The high color rendering performance makes the display picture color more vivid and realistic, bringing an immersive visual experience to the user. The high-efficiency heat dissipation performance can avoid problems such as display effect degradation, device running lag and the like caused by screen overheating, and ensure stable operation of the device, thereby improving the user's use experience and satisfaction in all aspects. The stable and efficient heat dissipation performance can reduce the working temperature of the display screen and related electronic components, reduce component aging and damage caused by high temperature, thereby prolonging the overall service life of the electronic device. At the same time, the hard and wear-resistant protective layer can effectively resist external physical damage, further protect the internal structure of the functional film and the screen of the electronic device, and reduce the cost of device maintenance and replacement.

[0067] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A high-performance functional film, characterized in that: The invention comprises a base layer (1), an anti-blue light layer (2), a quantum dot mold layer (3), a heat dissipation layer (4) and a protective layer (5), wherein the top of the base layer (1) is provided with the anti-blue light layer (2), the top of the anti-blue light layer (2) is provided with the quantum dot mold layer (3), the top of the quantum dot mold layer (3) is provided with the heat dissipation layer (4), and the top of the quantum dot mold layer (3) is provided with the protective layer (5); The base layer (1) is a polyethylene terephthalate film, which has good mechanical properties and chemical stability and can provide a stable supporting structure for the functional film. The anti-blue light layer (2) is made of a mixture of anti-blue light nanoparticles and acrylic resin, wherein the anti-blue light nanoparticles can effectively absorb and reflect blue light, reducing the damage of blue light to the eyes, and the acrylic resin acts as an adhesive to make the anti-blue light nanoparticles evenly dispersed and firmly attached to the base layer (1). The quantum dot mold layer (3) is made by mixing a quantum dot dispersion and a polymer resin. The quantum dots have excellent luminescence properties and can significantly improve the color expression of the display screen. The polymer resin plays a role in fixing and protecting the quantum dots. The heat dissipation layer (4) is formed by a composite of graphene nanosheets and thermally conductive silicone. The graphene nanosheets have ultra-high thermal conductivity and can quickly conduct heat, while the thermally conductive silicone has good flexibility and adhesion, so that the heat dissipation layer (4) can be tightly attached to the quantum dot mold layer (3) to achieve efficient heat dissipation. The protective layer (5) is configured as a transparent polyurethane film, which has good wear resistance and light transmittance, and can effectively protect the internal structure of the functional film while not affecting the display effect of the display screen.

2. A high-performance functional film according to claim 1, characterized in that: The thickness of the base layer (1) is 10-20 microns, the thickness of the anti-blue light layer (2) is set to 5-8 microns, and the thickness of the quantum dot mold layer (3) is set to 8-12 microns.

3. A high-performance functional film according to claim 1, characterized in that: The heat dissipation layer (4) has a thickness of 6-10 microns, and the protective layer (5) has a thickness of 5-10 microns.

4. A method for manufacturing a high-performance functional film, characterized in that: The following steps are involved: S1: Preparation of base layer (1): A polyethylene terephthalate (PET) film with a thickness of 10-20 μm is selected as the base layer (1), and the surface of the PET film is cleaned by ultrasonic cleaning with deionized water and ethanol in sequence for 10-20 minutes to remove dust, oil and other impurities on the surface of the PET film. The cleaned PET film is then dried at 60-80° C. for 30-60 minutes to obtain a clean and dry base layer (1); S2: Preparation of the anti-blue light layer (2): Rare earth-doped strontium titanate nanoparticles are dispersed in ethyl acetate to prepare a nanoparticle dispersion having a mass concentration of 15-20%; the nanoparticle dispersion and acrylic resin are stirred at 40-50° C. at a rate of 300-500 rpm for 50-70 minutes in a ratio of 10-15% by mass of the anti-blue light nanoparticles and 85-90% by mass of the acrylic resin to form a uniform mixed solution, which is then sprayed onto the base layer (1) to form the anti-blue light layer (2); S3: Preparation of quantum dot mold layer (3): CdSe / ZnS core-shell structure quantum dots are dispersed in an organic solvent, toluene, to prepare a quantum dot dispersion having a mass concentration of 20-30%; the quantum dot dispersion and polyvinyl alcohol (PVA) are stirred at a temperature of 50-60° C. at a rate of 400-600 rpm for 40-60 minutes, with the mass fraction of quantum dots being 8-12% and the mass fraction of polyvinyl alcohol (PVA) being 88-92% to form a uniform mixed slurry, and the mixed slurry is coated on the surface of the anti-blue light layer (2) to form a quantum dot mold layer (3); S4: Preparation of heat dissipation layer (4): adding graphene nanosheets to xylene, ultrasonically dispersing for 30-40 minutes, and preparing a graphene dispersion with a mass concentration of 10-15%; stirring and mixing the graphene dispersion with the thermal conductive silica gel at a ratio of 15-20% by mass of graphene nanosheets and 80-85% by mass of thermal conductive silica gel at 60-70°C, at a stirring speed of 600-800 rpm, and for 30-50 minutes to obtain a uniform heat dissipation layer (4) slurry, and uniformly coating the heat dissipation layer (4) slurry on the surface of the quantum dot mold layer (3) by a doctor blade method to form a heat dissipation layer (4); S5: Preparation of protective layer (5): A transparent polyurethane film with a thickness of 5-10 μm is selected as the protective layer (5), and the polyurethane film is bonded to the surface of the heat dissipation layer (4) by hot pressing. The hot pressing temperature is 100-120°C, the hot pressing pressure is 0.5-1.0 MPa, and the hot pressing time is 1-3 minutes to obtain a high-performance functional film.

5. The method for manufacturing a high-performance functional film according to claim 4, characterized in that: The mixed solution is sprayed evenly on the surface of the base layer (1) by spraying, and the spraying pressure is 0.3-0.5 MPa. The sprayed base layer (1) is then dried and cured at 70-85°C for 40-60 minutes to solidify the acrylic resin so that the anti-blue light layer (2) is firmly attached to the base layer (1).

6. The method for manufacturing a high-performance functional film according to claim 4, characterized in that: The mixed slurry is coated on the surface of the anti-blue light layer (2) by spin coating, the spin coating speed is 1500-2000 rpm, and the spin coating time is 30-40 seconds. Then, the coated base layer (1) is dried and cured at 70-80° C. for 30-40 minutes to form a quantum dot mold layer (3).

7. The method for manufacturing a high-performance functional film according to claim 4, characterized in that: The slurry is evenly coated on the surface of the quantum dot mold layer (3) by a scraping method, with a thickness controlled at 6-10 microns, and then dried and cured at 80-90°C for 50-70 minutes. The thermal conductive silicone is cured, so that the heat dissipation layer (4) is firmly connected to the quantum dot mold layer (3).

8. The method for manufacturing a high-performance functional film according to claim 4, characterized in that: A transparent polyurethane film with a thickness of 5 to 10 microns is selected as the protective layer (5). Through a hot pressing process, the polyurethane film is hot pressed for 1 to 3 minutes at a temperature of 100 to 120° C. and a pressure of 0.5 to 1.0 MPa, so that the surface molecules of the polyurethane film and the heat dissipation layer (4) interact with each other and fit tightly together, ultimately forming a complete high-performance functional film.

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