Anti-blue light optical composite film and preparation method thereof

Abstract

The present invention relates to a blue light-blocking optical composite film and a preparation method thereof, belonging to the technical field of polymer materials. The blue light-blocking optical composite film comprises, by weight, 70-90 parts of a resin, 0.1-3 parts of a modified antistatic agent, 1-5 parts of a high-temperature-resistant modifier, 0.2-5 parts of a blue light absorber, 0.3-1 parts of a stabilizer, 0.1-1 parts of a dispersant, and 0.1-1 parts of a lubricant. The blue light-blocking optical composite film produced by the present invention not only has good antistatic effects, but also has excellent high-temperature resistance and stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and in particular relates to a blue light protection optical composite film and a preparation method thereof. Background Art

[0002] With the widespread use of electronic products and artificial lighting, people are exposed to electronic screens for a long time. The high-energy blue light emitted by the screens will accelerate the death of retinal pigment epithelial cells, thereby damaging vision and affecting health. In order to reduce the damage of blue light to the eyes, the blue light of the display screen needs to be blocked.

[0003] However, the existing anti-blue light optical composite film is mainly made by directly coating anti-blue light coating on the film. However, during long-term use, the coating will come into contact with the outside world and cause wear, resulting in a weakening of the anti-blue light effect. At the same time, the traditional anti-blue light optical composite film is also prone to accumulate static electricity during use, which is difficult to eliminate, shortening the service life and seriously affecting the quality of the composite film. In addition, although the anti-blue light optical composite film has a certain high temperature resistance, with the increase in actual application needs, its own high temperature resistance no longer meets the needs. Therefore, the research and development of excellent anti-blue light optical composite film has important practical significance and application value. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a blue light blocking optical composite film and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A blue light blocking optical composite film and a preparation method thereof, comprising the following raw materials in parts by weight: 70-90 parts of PET resin, 0.1-3 parts of a modified antistatic agent, 1-5 parts of a high temperature resistant modifier, 0.2-5 parts of a blue light absorber, 0.3-1 parts of a stabilizer, 0.1-1 parts of a dispersant, and 0.1-1 parts of a lubricant;

[0007] The blue light absorber is anti-blue light powder U460-P100;

[0008] The stabilizer is carbon black;

[0009] The dispersant is polyethylene wax;

[0010] The lubricant is oleamide;

[0011] The modified antistatic agent is prepared by the following method:

[0012] Step A1: Undecylenic acid, diethanolamine, and sodium methoxide were uniformly mixed, stirred under nitrogen atmosphere for 5 minutes, slowly heated to 170-180°C, reacted for 2.5-3 hours, filtered, washed, and dried to obtain a compound;

[0013] Furthermore, the mass ratio of undecylenic acid, diethanolamine, and sodium methoxide is 9.21-18.43 g: 5.45-10.91 g: 0.06-0.12 g;

[0014] First, the amino group of diethanolamine reacts with the carboxyl group of undecylenic acid to synthesize a compound containing an alkanolamide bond;

[0015] Step A2: The compound, 1-chlorohexane, and methanol were mixed and refluxed for 12 hours. After cooling to room temperature, tetrahydrofuran was added and mixed. The mixture was centrifuged at 4000 rpm for 3 minutes and dried under nitrogen to obtain an intermediate product.

[0016] Furthermore, the ratio of the compound, 1-chlorohexane, methanol, and tetrahydrofuran is 0.05-0.1 mol: 6.03-12.06 g: 2 mL: 2 mL;

[0017] Secondly, the chlorine atom of 1-chlorohexane is used to quaternize the compound to produce a positively charged intermediate product;

[0018] Step A3: The intermediate product, methacrylamide, glycidyl methacrylate, and acetonitrile were mixed uniformly, stirred for 30 minutes, and then azobisisobutyronitrile was added and mixed. The mixture was reacted at 70° C. for 3 hours, rotary evaporated, and vacuum dried at 50° C. for 12 hours. The mixture was cooled to obtain a modified antistatic agent.

[0019] Furthermore, the ratio of the intermediate product, methacrylamide, glycidyl methacrylate, acetonitrile, and azobisisobutyronitrile is 0.05-0.1 mol: 3.55-7.1 g: 7.1-14.2 g: 2 mL: 0.25-0.35 g;

[0020] Finally, the modified antistatic agent was synthesized by utilizing the carbon-carbon double bond copolymerization of the intermediate product, methacrylamide and glycidyl methacrylate.

[0021] The high temperature resistant modifier is prepared by the following method:

[0022] Step B1: Trifluoropropylmethylcyclotrisiloxane and hexamethylcyclotrisiloxane were mixed and stirred uniformly, the system was heated to 45°C, concentrated sulfuric acid was added, and the reaction was continued at this temperature for 1 hour, and then tetramethyldisilane was added and the reaction was continued at this temperature for 5 hours. After that, the system was neutralized with anhydrous Na2CO3, filtered, and distilled under reduced pressure to obtain an intermediate;

[0023] Furthermore, the usage ratio of trifluoropropylmethylcyclotrisiloxane, hexamethylcyclotrisiloxane, concentrated sulfuric acid, tetramethyldisilane, and anhydrous Na2CO3 is 2.78-4.18 g: 2.2-3.31 g: 0.1-0.15 mL: 2.69-4.03 g: 0.1-0.2 g;

[0024] First, trifluoropropylmethylcyclotrisiloxane and hexamethylcyclotrisiloxane are ring-opening polycondensed, and then tetramethyldisilane is used to cap the intermediate.

[0025] Step B2: Vinyltriethoxysilane and the intermediate were mixed evenly, and the system was heated to 90°C and stirred for 20 minutes. Chloroplatinic acid was added and the reaction was continued at a constant temperature for 4 hours. Then, an ethanol-water mixed solution and 4-hydroxyphenyl sulfone were added and stirred at 35°C for 10 hours. The mixture was cooled to room temperature, filtered, washed, and dried to obtain a high-temperature resistant modifier.

[0026] Furthermore, the usage ratio of vinyltriethoxysilane, intermediate, chloroplatinic acid, ethanol-water mixed solution, and 4-hydroxyanisylsulfone is 3.81 g: 0.01 mol: 3-5 g: 80-150 mL: 9.13 g, and the volume ratio of ethanol to deionized water in the ethanol-water mixed solution is 4:1;

[0027] Finally, the intermediate reacts with the carbon-carbon double bond of vinyltrimethoxysilane, which is then hydrolyzed to form silanol groups that react with the hydroxyl groups of 4-hydroxyphenylmethylsulfone to prepare a high-temperature resistant modifier.

[0028] A method for preparing a blue light-blocking optical composite film comprises the following steps:

[0029] S1. Place PET resin, modified antistatic agent, high temperature resistant modifier, blue light absorber, stabilizer, dispersant and lubricant in a vacuum drum and dry at 120-150° C. for 4-16 hours to obtain a mixed material;

[0030] S2. The mixed material is placed in a single-screw extruder with the five-section temperatures of the extruder being 190°C, 205°C, 220°C, 230°C, and 240°C respectively. The mixed material is evenly mixed at a rotation speed of 45-50rpm, extruded and cast into a cast sheet, stretched 8 times at 80-120°C in a longitudinal stretching unit, and then stretched 3.5-4 times at 85-125°C in a transverse stretching machine. The mixed material is preheated, tentered, and heat-set at 230-240°C, and then rapidly cooled by a cooling device, slit, and wound to prepare an anti-blue light optical composite film.

[0031] Beneficial effects of the present invention:

[0032] The anti-blue light optical composite film of the present invention has good antistatic effect, and also has excellent high temperature resistance and stability, thereby extending the service life of the material.

[0033] The modified antistatic agent prepared by the present invention, with its advantages as a macromolecular polymer, exhibits antistatic performance that surpasses traditional small-molecule antistatic agents. In the modified antistatic agent, the intermediate containing alkanolamide bonds forms a conductive layer on the material surface, reducing resistivity, accelerating the dissipation of static charge, achieving an antistatic effect, and imparting lubricity to the material, reducing friction and thus reducing static electricity generation. Simultaneously, the intermediate product enhances hydrophilicity, and the ionized water film formed by moisture absorption acts as a conductive medium, accelerating the transfer and dissipation of charge. Furthermore, the static elimination properties and strong adsorption capacity of the quaternary ammonium salt effectively avoid the negative impact of static electricity on production and product quality. Furthermore, the epoxy groups in the polymerized glycidyl methacrylate can react with the hydroxyl groups in PET, enhancing intermolecular interactions, improving toughness, and forming a conductive network, further reducing surface resistivity. The intermediate acts synergistically with the quaternary ammonium salt to enhance the conductive efficiency of ions on the material surface and reduce static electricity accumulation.

[0034] The -Si-O- crosslinking system formed in the high-temperature resistant modifier prepared by the present invention remains stable in high-temperature environments. Due to its large bond energy, it is not easy to break, ensuring that the material can have good molecular structure integrity at high temperatures and avoiding thermal decomposition or thermal degradation. At the same time, the silicon-oxygen bond has high stability to oxygen and is not easily oxidized, maintaining the good stability of the material in a high-temperature oxidizing environment. In addition, the intermediate can also form a three-dimensional network structure through a cross-linking reaction, and synergistically act with 4-hydroxyphenyl sulfone to not only improve the heat resistance of the material, but also significantly enhance the hardness and chemical stability of the material. In addition, the fluorine-carbon bond in trifluoropropylmethylcyclotrisiloxane also has high-temperature resistance and gives the material good chemical corrosion resistance, ensuring that the material exhibits better durability and reliability in various applications. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] Example 1: A method for preparing a blue light blocking optical composite film, comprising the following steps:

[0037] S1. Weigh the raw materials by weight: 70 parts of PET resin, 0.1 part of modified antistatic agent (prepared in this example), 1 part of high-temperature resistant modifier (prepared in this example), 0.2 part of blue light absorber, 0.3 part of stabilizer, 0.1 part of dispersant, and 0.1 part of lubricant; place the PET resin, modified antistatic agent, high-temperature resistant modifier, blue light protection powder U460-P100, carbon black, polyethylene wax, and oleamide in a vacuum drum and dry at 120° C. for 4 hours to obtain a mixed material;

[0038] S2. The mixed material is placed in a single-screw extruder, and the temperatures of the five sections of the extruder are 190° C., 205° C., 220° C., 230° C., and 240° C., respectively. The mixed material is uniformly mixed at a speed of 45 rpm, extruded and cast into a cast sheet, stretched 8 times at 80° C. in a longitudinal stretching unit, and then stretched 3.5 times at 85° C. in a transverse stretching machine. The mixed material is preheated, tentered, and heat-set at 230° C., and rapidly cooled by a cooling device, slitting, and winding to prepare an anti-blue light optical composite film;

[0039] The modified antistatic agent is prepared by the following method:

[0040] Step A1: 9.21 g of undecylenic acid, 5.45 g of diethanolamine, and 0.06 g of sodium methoxide were mixed uniformly, stirred under a nitrogen atmosphere for 5 min, and slowly heated to 170° C., reacted for 2.5 h, filtered, washed, and dried to obtain a compound;

[0041] Step A2: 0.05 mol of the compound, 6.03 g of 1-chlorohexane, and 2 mL of methanol were mixed and refluxed for 12 h. After cooling to room temperature, 2 mL of tetrahydrofuran was added and mixed. The mixture was centrifuged at 4000 rpm for 3 min and dried under nitrogen to obtain an intermediate.

[0042] Step A3: 0.05 mol of the intermediate product, 3.55 g of methacrylamide, 7.1 g of glycidyl methacrylate, and 2 mL of acetonitrile were mixed uniformly, stirred for 30 min, and then 0.25 g of azobisisobutyronitrile was added and mixed. The mixture was reacted at 70° C. for 3 h, rotary evaporated, and vacuum dried at 50° C. for 12 h. The mixture was cooled to obtain a modified antistatic agent.

[0043] The high temperature resistant modifier is prepared by the following method:

[0044] Step B1: 2.78 g of trifluoropropylmethylcyclotrisiloxane and 2.2 g of hexamethylcyclotrisiloxane were mixed and stirred uniformly, the system was heated to 45°C, 0.1 mL of concentrated sulfuric acid was added, and the reaction was continued at this temperature for 1 hour. Then, 2.69 g of tetramethyldisilane was added and the reaction was continued at this temperature for 5 hours. After that, the system was neutralized with 0.1 g of anhydrous Na2CO3, filtered, and distilled under reduced pressure to obtain an intermediate;

[0045] Step B2: Mix 3.81 g of vinyltriethoxysilane and 0.01 mol of the intermediate evenly, heat the system to 90 ° C and stir for 20 minutes, add 3 g of chloroplatinic acid, continue the constant temperature reaction for 4 hours, then add 80 mL of ethanol-water mixed solution and 9.13 g of 4-hydroxyphenyl sulfone, stir at 35 ° C for 10 hours, cool to room temperature, filter, wash, and dry to obtain a high-temperature resistant modifier. The volume ratio of ethanol and deionized water in the ethanol-water mixed solution is 4:1.

[0046] Example 2: A method for preparing a blue light blocking optical composite film, comprising the following steps:

[0047] S1. Weigh the raw materials by weight: 80 parts of PET resin, 2 parts of modified antistatic agent (prepared in this example), 3 parts of high-temperature resistant modifier (prepared in this example), 3 parts of blue light absorber, 0.7 parts of stabilizer, 0.5 parts of dispersant, and 0.5 parts of lubricant; place the PET resin, modified antistatic agent, high-temperature resistant modifier, blue light protection powder U460-P100, carbon black, polyethylene wax, and oleamide in a vacuum drum and dry at 135° C. for 10 hours to obtain a mixed material;

[0048] S2. The mixed material is placed in a single-screw extruder, and the temperatures of the five sections of the extruder are 190° C., 205° C., 220° C., 230° C., and 240° C., respectively. The mixed material is uniformly mixed at a speed of 47 rpm, extruded and cast into a cast sheet, stretched 8 times at 100° C. in a longitudinal stretching unit, and then stretched 3.7 times at 105° C. in a transverse stretching machine. The mixed material is preheated, tentered, and heat-set at 235° C., and rapidly cooled by a cooling device, slitting, and winding to prepare an anti-blue light optical composite film;

[0049] The modified antistatic agent is prepared by the following method:

[0050] Step A1: 13.82 g of undecylenic acid, 8.18 g of diethanolamine, and 0.09 g of sodium methoxide were mixed uniformly, stirred under a nitrogen atmosphere for 5 min, slowly heated to 175° C., reacted for 2.75 h, filtered, washed, and dried to obtain a compound;

[0051] Step A2: 0.075 mol of the compound, 9.045 g of 1-chlorohexane, and 2 mL of methanol were mixed and refluxed for 12 h. After cooling to room temperature, 2 mL of tetrahydrofuran was added and mixed. The mixture was centrifuged at 4000 rpm for 3 min and dried under nitrogen to obtain an intermediate.

[0052] Step A3: 0.075 mol of the intermediate product, 5.325 g of methacrylamide, 10.65 g of glycidyl methacrylate, and 2 mL of acetonitrile were mixed uniformly, stirred for 30 min, and then 0.3 g of azobisisobutyronitrile was added and mixed. The mixture was reacted at 70° C. for 3 h, rotary evaporated, and vacuum dried at 50° C. for 12 h. The mixture was cooled to obtain a modified antistatic agent.

[0053] The high temperature resistant modifier is prepared by the following method:

[0054] Step B1: 3.48 g of trifluoropropylmethylcyclotrisiloxane and 2.755 g of hexamethylcyclotrisiloxane were mixed and stirred uniformly, the system was heated to 45°C, 0.125 mL of concentrated sulfuric acid was added, and the reaction was continued at this temperature for 1 hour. Then 3.36 g of tetramethyldisilane was added and the reaction was continued at this temperature for 5 hours. After that, the system was neutralized with 0.15 g of anhydrous Na2CO3, filtered, and distilled under reduced pressure to obtain an intermediate;

[0055] Step B2: Mix 3.81 g of vinyltriethoxysilane and 0.01 mol of the intermediate evenly, heat the system to 90 ° C and stir for 20 minutes, add 4 g of chloroplatinic acid, continue the constant temperature reaction for 4 hours, then add 115 mL of ethanol-water mixed solution and 9.13 g of 4-hydroxyphenyl sulfone, stir at 35 ° C for 10 hours, cool to room temperature, filter, wash, and dry to obtain a high temperature resistant modifier. The volume ratio of ethanol and deionized water in the ethanol-water mixed solution is 4:1.

[0056] Example 3: A method for preparing a blue light blocking optical composite film, comprising the following steps:

[0057] S1. Weigh the raw materials by weight: 90 parts of PET resin, 3 parts of modified antistatic agent (prepared in this example), 5 parts of high-temperature resistant modifier (prepared in this example), 5 parts of blue light absorber, 1 part of stabilizer, 1 part of dispersant, and 1 part of lubricant; place the PET resin, modified antistatic agent, high-temperature resistant modifier, blue light blocking powder U460-P100, carbon black, polyethylene wax, and oleamide in a vacuum drum, and dry at 150° C. for 16 hours to obtain a mixed material;

[0058] S2. The mixed material is placed in a single-screw extruder, and the temperatures of the five sections of the extruder are 190° C., 205° C., 220° C., 230° C., and 240° C., respectively. The mixed material is uniformly mixed at a speed of 50 rpm, extruded and cast into a cast sheet, stretched 8 times at 120° C. in a longitudinal stretching unit, and then stretched 4 times at 125° C. in a transverse stretching machine. The film is preheated, tentered, and heat-set at 240° C., and then rapidly cooled by a cooling device, slitting, and winding to prepare an anti-blue light optical composite film;

[0059] The modified antistatic agent is prepared by the following method:

[0060] Step A1: 18.43 g of undecylenic acid, 10.91 g of diethanolamine, and 0.12 g of sodium methoxide were mixed uniformly, stirred under a nitrogen atmosphere for 5 min, and slowly heated to 180° C., reacted for 3 h, filtered, washed, and dried to obtain a compound;

[0061] Step A2: 0.1 mol of the compound, 12.06 g of 1-chlorohexane, and 2 mL of methanol were mixed and refluxed for 12 h. After cooling to room temperature, 2 mL of tetrahydrofuran was added and mixed. The mixture was centrifuged at 4000 rpm for 3 min and dried under nitrogen to obtain an intermediate.

[0062] Step A3: 0.1 mol of the intermediate product, 7.1 g of methacrylamide, 14.2 g of glycidyl methacrylate, and 2 mL of acetonitrile were mixed uniformly, stirred for 30 min, and then 0.35 g of azobisisobutyronitrile was added and mixed. The mixture was reacted at 70° C. for 3 h, rotary evaporated, and vacuum dried at 50° C. for 12 h. The mixture was cooled to obtain a modified antistatic agent.

[0063] The high temperature resistant modifier is prepared by the following method:

[0064] Step B1: 4.18 g of trifluoropropylmethylcyclotrisiloxane and 3.31 g of hexamethylcyclotrisiloxane were mixed and stirred uniformly, the system was heated to 45°C, 0.15 mL of concentrated sulfuric acid was added, and the reaction was continued at this temperature for 1 hour. Then 4.03 g of tetramethyldisilane was added and the reaction was continued at this temperature for 5 hours. After that, the system was neutralized with 0.2 g of anhydrous Na2CO3, filtered, and distilled under reduced pressure to obtain an intermediate;

[0065] Step B2: Mix 3.81 g of vinyltriethoxysilane and 0.01 mol of the intermediate evenly, heat the system to 90 ° C and stir for 20 minutes, add 5 g of chloroplatinic acid, continue the constant temperature reaction for 4 hours, then add 150 mL of ethanol-water mixed solution and 9.13 g of 4-hydroxyanisole, stir at 35 ° C for 10 hours, cool to room temperature, filter, wash, and dry to obtain a high-temperature resistant modifier. The volume ratio of ethanol and deionized water in the ethanol-water mixed solution is 4:1.

[0066] Comparative Example 1: This comparative example is an anti-blue light optical composite film. The difference from Example 3 is that the modified antistatic agent prepared in Example 3 is replaced by an equal amount of octadecyldimethylhydroxyethyl quaternary ammonium nitrate, and the rest are the same.

[0067] Comparative Example 2: This comparative example is an anti-blue light optical composite film. The difference from Example 3 is that an equal amount of N-phenylmaleimide is used to replace the high-temperature resistant modifier prepared in Example 3, and the rest are the same.

[0068] Performance testing: The surface resistivity of the anti-blue light optical composite films prepared in Examples 1-3 and Comparative Examples 1-2 was tested in accordance with GB / T1410-2006. The anti-blue light optical composite films were cut into 500 cm × 500 cm pieces and placed in a 150°C oven for 30 minutes to test their shrinkage. The hardness of the anti-blue light optical composite films was tested, with a 2H hardness greater than H, and the chemical corrosion resistance time was tested. The test results are shown in Table 1 below:

[0069] Table 1

[0070]

[0071] It can be seen from the test data in Table 1 that the anti-blue light optical composite film prepared by the present invention has a good anti-static effect. It can also be seen from the above table that the anti-blue light optical composite film prepared by the present invention has high temperature resistance and stability, which extends the service life of the material.

[0072] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A method for preparing a blue light-blocking optical composite film, characterized in that: The specific steps include: S1. Weigh the raw materials by weight, add 70-90 parts of PET resin, 0.1-3 parts of modified antistatic agent, 1-5 parts of high temperature resistant modifier, 0.2-5 parts of blue light absorber, 0.3-1 parts of stabilizer, 0.1-1 parts of dispersant and 0.1-1 parts of lubricant into a vacuum drum, and dry at 120-150° C. for 4-16 hours to obtain a mixed material; S2. The mixed material is placed in a single-screw extruder, and the temperatures of the five sections of the extruder are 190° C., 205° C., 220° C., 230° C., and 240° C., respectively. The mixed material is evenly mixed at a speed of 45-50 rpm, extruded and cast into a cast sheet, stretched 8 times in a longitudinal stretching unit at 80-120° C., and then stretched 3.5-4 times in a transverse stretching machine at 85-125° C., preheated, tentered, and heat-set at 230-240° C., and rapidly cooled by a cooling device, slitting, and winding to prepare an anti-blue light optical composite film; The modified antistatic agent is prepared by the following method: Step A1: Undecylenic acid, diethanolamine, and sodium methoxide were uniformly mixed, stirred under nitrogen atmosphere for 5 minutes, slowly heated to 170-180°C, reacted for 2.5-3 hours, filtered, washed, and dried to obtain a compound; Step A2: The compound, 1-chlorohexane, and methanol were mixed and refluxed for 12 hours. After cooling to room temperature, tetrahydrofuran was added and mixed. The mixture was centrifuged at 4000 rpm for 3 minutes and dried under nitrogen to obtain an intermediate product. Step A3: The intermediate product, methacrylamide, glycidyl methacrylate, and acetonitrile were mixed uniformly, stirred for 30 minutes, and then azobisisobutyronitrile was added and mixed. The mixture was reacted at 70° C. for 3 hours, rotary evaporated, and vacuum dried at 50° C. for 12 hours. The mixture was cooled to obtain a modified antistatic agent. The high temperature resistant modifier is prepared by the following method: Step B1: Trifluoropropylmethylcyclotrisiloxane and hexamethylcyclotrisiloxane were mixed and stirred uniformly, the system was heated to 45°C, concentrated sulfuric acid was added, and the reaction was continued at this temperature for 1 hour, and then tetramethyldisilane was added and the reaction was continued at this temperature for 5 hours. After that, the system was neutralized with anhydrous Na2CO3, filtered, and distilled under reduced pressure to obtain an intermediate; Step B2: Mix vinyltriethoxysilane and the intermediate evenly, heat the system to 90°C and stir for 20 minutes, add chloroplatinic acid, continue the constant temperature reaction for 4 hours, then add ethanol-water mixed solution and 4-hydroxyanisole, stir at 35°C for 10 hours, cool to room temperature, filter, wash, and dry to obtain a high-temperature resistant modifier.

2. The method for preparing a blue light blocking optical composite film according to claim 1, wherein: The mass ratio of undecylenic acid, diethanolamine, and sodium methoxide in step A1 is 9.21-18.43 g: 5.45-10.91 g: 0.06-0.12 g.

3. The method for preparing a blue light blocking optical composite film according to claim 1, wherein: In step A2, the usage ratio of the compound, 1-chlorohexane, methanol, and tetrahydrofuran is 0.05-0.1 mol: 6.03-12.06 g: 2 mL: 2 mL.

4. The method for preparing a blue light blocking optical composite film according to claim 1, wherein: The usage ratio of the intermediate product, methacrylamide, glycidyl methacrylate, acetonitrile, and azobisisobutyronitrile in step A3 is 0.05-0.1 mol: 3.55-7.1 g: 7.1-14.2 g: 2 mL: 0.25-0.35 g.

5. The method for preparing a blue light blocking optical composite film according to claim 1, wherein: In step B1, the usage ratio of trifluoropropylmethylcyclotrisiloxane, hexamethylcyclotrisiloxane, concentrated sulfuric acid, tetramethyldisilane, and anhydrous Na2CO3 is 2.78-4.18 g: 2.2-3.31 g: 0.1-0.15 mL: 2.69-4.03 g: 0.1-0.2 g.

6. The method for preparing a blue light blocking optical composite film according to claim 1, wherein: In step B2, the usage ratio of vinyltriethoxysilane, intermediate, chloroplatinic acid, ethanol-water mixed solution, and 4-hydroxyanisylsulfone is 3.81 g:0.01 mol:3-5 g:80-150 mL:9.13 g, and the volume ratio of ethanol to deionized water in the ethanol-water mixed solution is 4:

1.

7. The method for preparing a blue light blocking optical composite film according to claim 1, wherein: The blue light absorber is anti-blue light powder U460-P100, the stabilizer is carbon black, the dispersant is polyethylene wax, and the lubricant is oleamide.

8. A blue light blocking optical composite film, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 7.

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