Electronic screen high-frequency blue light prevention spray based on modified coating material and preparation method and application thereof

Abstract

The application provides a high-frequency blue light spray agent for electronic screen based on modified coating material, which comprises the following components in parts by mass: 80-100 parts of ethanol, 1-10 parts of polyvinyl butyral, 0.1-10 parts of polyvinylpyrrolidone and 0.1-1 parts of blue light shielding agent. The application also provides a preparation method of the high-frequency blue light spray agent for electronic screen based on modified coating material. The polyvinyl butyral is used as a film forming material, and the film can be formed quickly. The polyvinylpyrrolidone is added at the same time, the optical transparency of the film is enhanced, the adhesion of the film is improved, the brittleness of the film is reduced, the viscosity of the solution is controlled, the film is easier to process and apply, and the blue light shielding agent is lutein. The lutein absorbs blue light through its conjugated structure and acts as a natural blue light filter, the blocking rate of high-frequency blue light reaches more than 90%, and potential damage caused by excessive exposure to high-energy light is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic product blue light prevention, in particular to an electronic screen high-frequency blue light prevention spray based on modified coating material and a preparation method and application thereof. BACKGROUND

[0002] Blue light refers to visible light in a wide range of 380nm to 480nm, and the blue light has a short wavelength and high energy, and can directly penetrate the crystal to the retina of the fundus. The blue light with a wavelength of 380nm-435nm is called high-frequency blue light, which has high energy and can directly reach the retina, causing free radicals in the retina, which can lead to the atrophy of retinal pigment epithelial cells, resulting in a lack of nutrients for photosensitive cells and causing vision impairment, macular degeneration, and compression of the lens, causing myopia.

[0003] In daily life, various new types of artificial light sources, such as mobile phones, tablet displays, liquid crystal displays, fluorescent lamps, LED lamps, and bath heaters, can generate harmful high-frequency blue light when in use. Long-term use of these devices can greatly increase the time of eye exposure to high-frequency blue light, causing eye diseases such as vision loss, cataracts, or blindness.

[0004] Currently, there are two common methods for shielding high-frequency blue light: one method is to sequentially plate or deposit multiple layers of film on the surface of the substrate, and the multiple layers of film can achieve coherent cancellation of the blue light band, thereby reducing the transmittance of blue light; the other method is to use a blue light absorber to absorb blue light, thereby reducing the transmittance of blue light and achieving the effect of filtering blue light. These methods can shield high-frequency blue light to some extent, but have low barrier rate for high-frequency blue light, and also have the problems of low light transmittance of the coating material, poor adhesion to the electronic screen, and inconvenient use. SUMMARY

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide an electronic screen high-frequency blue light prevention spray based on modified coating material, which improves the adhesion and light transmittance of the coating material to the electronic screen, and enhances the barrier rate for high-frequency blue light.

[0006] Another purpose of the present application is to provide a preparation method of an electronic screen high-frequency blue light prevention spray based on modified coating material.

[0007] The purpose of the present application is achieved by the following technical solutions:

[0008] An electronic screen high-frequency blue light prevention spray based on modified coating material, comprising the following components by mass fraction:

[0009]

[0010] Preferably, the ethanol concentration is 95%.

[0011] Preferably, the blue light shielding agent is an inorganic blue light shielding agent or an organic blue light shielding agent.

[0012] Preferably, the inorganic blue light shielding agent is one of cerium oxide, kaolin, silicon oxide, calcium carbonate, zinc oxide, ferric oxide or magnesium oxide.

[0013] Preferably, the organic blue light shielding agent is one of a yellow dye, a yellow pigment or lutein.

[0014] Preferably, the yellow dye is one of permanent yellow, transparent yellow or fluorescent yellow.

[0015] More preferably, the blue light shielding agent is lutein.

[0016] More preferably, the concentration of the lutein is 2% (w / v).

[0017] A method for preparing an electronic screen high-frequency blue light shielding spray based on a modified coating material, comprising the following steps:

[0018] (1) adding polyvinyl butyral into ethanol, stirring to dissolve under a closed condition to obtain a polyvinyl butyral-ethanol mixed solution;

[0019] (2) adding polyvinylpyrrolidone into the polyvinyl butyral-ethanol mixed solution, stirring to dissolve to obtain a polyvinyl butyral-ethanol-polyvinylpyrrolidone mixed solution;

[0020] (3) adding a blue light shielding agent into the polyvinyl butyral-ethanol-polyvinylpyrrolidone mixed solution, stirring to mix uniformly to obtain a high-frequency blue light shielding spray.

[0021] Preferably, in step (2), the temperature of the stirring is 40-45℃.

[0022] An application of an electronic screen high-frequency blue light shielding spray based on a modified coating material, the spray is sprayed on the surface of a glass slide, and then the surface of the substrate is wiped to form a high-frequency blue light shielding spray coating.

[0023] The polyvinyl butyral (PVB) is used as a film forming material in the present application, which can form a film quickly; the polyvinylpyrrolidone (PVP) is added at the same time, which can improve the adhesion of the film, enhance the optical transparency of the film, reduce the brittleness of the film, control the viscosity of the solution, and make the film easier to process and apply; in addition, the lutein is used as a blue light shielding agent in the present application, which can absorb blue light through its conjugated structure and act as a natural blue light filter, and the blocking rate of the high-frequency blue light can reach more than 90%, thereby reducing the potential damage caused by excessive exposure to high-energy light.

[0024] The prepared high-frequency blue light-proof spray agent of the present application is used in the manner of first spraying (or drop coating) and then wiping to uniformly coat the high-frequency blue light-proof spray agent on the surface of the transparent substrate, so that the high-frequency blue light-proof spray coating can be quickly constructed, and the use is convenient. The high-frequency blue light-proof spray coating formed has strong adhesion to the electronic screen, high light transmittance and good high-frequency blue light blocking effect. Moreover, the system of the high-frequency blue light-proof spray agent used in the present application is an alcohol system, and the preparation method and raw materials thereof are environmentally friendly and in line with the environmental protection concept.

[0025] Polyvinyl butyral can form hydrogen bonds with each other, and also with other polar molecules or surfaces, which makes the polyvinyl butyral chains tightly bound, thereby forming a continuous film. When polyvinyl butyral solution is coated on a surface and dried, the solvent evaporates, leaving a solid film composed of tightly packed polyvinyl butyral polymer chains. During the drying process, the hydrogen bond interactions become more pronounced, forming a cohesive and uniform film. During the spraying process, hydrogen bonds are formed with the molecules on the surface of the substrate, which makes the PVB chains tightly bound, showing good adhesion to various substrates (such as glass). This adhesion further helps to form a stable and durable film.

[0026] The addition of polyvinylpyrrolidone can reduce the intermolecular forces between polyvinyl butyral chains, making the film more flexible and less prone to breakage. Polyvinylpyrrolidone can also enhance the compatibility between polyvinyl butyral and the solvent (ethanol), resulting in a more uniform distribution of polymer chains in the solution, thereby reducing the formation of areas with different polymer densities during the drying process, improving the adhesion of the coating to the electronic screen, increasing the optical transparency, and reducing the brittleness of the coating. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Schematic diagram of blue light-proof coating material absorbing blue light.

[0028] Figure 2 Scanning electron microscope image of the blue light-proof spray coating of Example 5. DETAILED DESCRIPTION

[0029] The invention purposes of the present application will be further described in detail below in combination with the drawings and specific examples. The examples cannot be described one by one here, but the implementation manners of the present application are not limited to the following examples.

[0030] Example 1

[0031] The electronic screen high-frequency blue light-proof spray agent based on modified coating material of the present embodiment comprises the following components by mass fraction: polyvinyl butyral 2 parts by mass, 95% ethanol 100 parts by mass, and polyvinylpyrrolidone 0.5 parts by mass.

[0032] The preparation method of the electronic screen high-frequency blue light spray-proof agent based on the modified coating material of the present embodiment comprises the following steps:

[0033] (1) Taking a glass slide as a coating substrate material, polyvinyl butyral is dissolved in 95% ethanol, and polyvinylpyrrolidone is added. The above raw materials are sequentially placed in a reactor for mixing, heated to 40°C, stirred for 60 min, and then filtered to obtain a polyvinyl butyral-ethanol-polyvinylpyrrolidone mixed solution;

[0034] (2) The filtered polyvinyl butyral-ethanol-polyvinylpyrrolidone mixed solution is placed in a sprayer and sprayed on the surface of the glass slide, and then the surface of the substrate is wiped with an attached soft cloth to form a coating.

[0035] Test 1: Detection of coating performance

[0036] 1. Film forming time

[0037] Measurement method: Take the mixed solution, spray it on a glass slide (76mm x 26mm), wipe it evenly with a soft cloth, and start timing. When the coating film can be lifted, timing ends, and the time is recorded as the film forming time of the coating. During detection, each group is repeated 5 times, and the average value is taken as the final film forming time of the coating. The test results are shown in Table 1.

[0038] 2. Peeling difficulty

[0039] Measurement method: Take an appropriate amount of mixed solution, spray it on a glass slide (76mm x 26mm), wipe it evenly with a soft cloth, and after 5 minutes, when the coating film is completely formed, pull the coating to detect the peeling difficulty of the coating. The test results are shown in Table 1.

[0040] Judgment criteria:

[0041] Easy: The film can be lifted and peeled off without effort, and there is basically no residue.

[0042] Difficult: It is difficult to lift and peel off the film, or it needs to be rubbed to peel off the coating.

[0043] Very difficult: Basically cannot be lifted, still in gel form.

[0044] 3. Film strength

[0045] Measurement method: Take an appropriate amount of mixed solution, spray it on a glass slide (76mm x 26mm), wipe it evenly with a soft cloth, and after film formation, detect whether it can be taken off without breaking. After taking off, apply a transverse tensile force to judge the film strength, and the test results are shown in Table 1.

[0046] Judgment criteria:

[0047] Good: film breaks with normal application of lateral force during peeling.

[0048] Good: film breaks with normal application of lateral force during peeling.

[0049] Fair: film breaks with slight application of lateral force during peeling.

[0050] Poor: film breaks with no application of lateral force during peeling.

[0051] Example 2

[0052] The electronic screen high-frequency blue light protection spray based on modified coating material of this example includes the following components by mass fraction: polyvinyl butyral 2 parts by mass, 95% ethanol 100 parts by mass, and polyvinylpyrrolidone 1 part by mass.

[0053] The preparation steps and coating performance detection method are the same as those of Example 1, and the results of coating performance detection are shown in Table 1.

[0054] Example 3

[0055] The electronic screen high-frequency blue light protection spray based on modified coating material of this example includes the following components by mass fraction: polyvinyl butyral 4 parts by mass, 95% ethanol 100 parts by mass, and polyvinylpyrrolidone 1.5 parts by mass.

[0056] The preparation steps and coating performance detection method are the same as those of Example 1, and the results of coating performance detection are shown in Table 1.

[0057] Example 4

[0058] The electronic screen high-frequency blue light protection spray based on modified coating material of this example includes the following components by mass fraction: polyvinyl butyral 2 parts by mass, 95% ethanol 100 parts by mass, and polyvinylpyrrolidone 2 parts by mass.

[0059] The preparation steps and coating performance detection method are the same as those of Example 1, and the results of coating performance detection are shown in Table 1.

[0060] Example 5

[0061] The electronic screen high-frequency blue light protection spray based on modified coating material of this example includes the following components by mass fraction: polyvinyl butyral 2 parts by mass, 95% ethanol 100 parts by mass, polyvinylpyrrolidone 1.5 parts by mass, and lutein 2 parts by mass.

[0062] The preparation method of the electronic screen high-frequency blue light protection spray based on modified coating material of this example includes the following steps:

[0063] (1) The glass slide is used as the coating substrate material, polyvinyl butyral is dissolved in 95% ethanol, polyvinylpyrrolidone and lutein are added, and the above raw materials are sequentially placed in a reactor for mixing. After heating to 40°C and stirring for 90 min, filtration is performed to obtain a high-frequency blue light-proof spray;

[0064] (2) The high-frequency blue light-proof spray is placed in a sprayer and sprayed on the surface of the glass slide. The surface of the substrate is wiped with the attached soft cloth to form a high-frequency blue light-proof spray coating.

[0065] Coating high-frequency blue light-proof performance detection:

[0066] 1. Transmittance:

[0067] The layered structure sample of the high-frequency blue light-proof spray coating / glass slide is measured for transmittance (%) using a blue-violet light tester (trade name: LS108, produced by Shenzhen Linshang Technology Co., Ltd.). The test results are shown in Table 2.

[0068] 2. Blue light blocking rate:

[0069] The test piece is prepared according to Test 3, and then the blue light-proof spray coating is tested for blocking rate (%) at a blue light wavelength of 430 nm using a blue-violet light tester (model LS108). The test results are shown in Table 2.

[0070] 3. Ultraviolet transmittance:

[0071] The test piece is prepared according to Test 3, and then the blue light-proof spray coating is tested for blocking rate (%) at an ultraviolet wavelength of 395 nm using a blue-violet light tester (model LS108). The test results are shown in Table 2.

[0072] Comparative Example 1

[0073] The high-frequency blue light-proof spray for electronic screens based on a modified coating material of this example includes the following component raw materials by mass:

[0074] Polyvinyl butyral 2 parts by mass, 95% ethanol 100 parts by mass.

[0075] The preparation method is as follows:

[0076] (1) Polyvinyl butyral is dissolved in 95% ethanol, heated to 40°C, stirred for 60 min, and then filtered to obtain a polyvinyl butyral-ethanol mixture;

[0077] (2) The polyvinyl butyral-ethanol mixture is placed in a sprayer and sprayed on the surface of the glass slide. The surface of the substrate is wiped with the attached soft cloth.

[0078] The coating performance detection method is the same as that of Example 1, and the results of the coating performance detection are shown in Table 1.

[0079] Comparative Example 2

[0080] This embodiment of an electronic screen anti-high-frequency blue light spray based on a modified coating material comprises the following raw materials by weight:

[0081] Two parts by weight of polyvinyl butyral, 100 parts by weight of 95% ethanol, 1.5 parts by weight of polyvinylpyrrolidone, and two parts by weight of permanent yellow.

[0082] The preparation method of an electronic screen anti-high-frequency blue light spray based on modified coating material in this embodiment includes the following steps:

[0083] (1) Using a glass slide as the coating substrate material, polyvinyl butyral is dissolved in 95% ethanol, and then polyvinylpyrrolidone and permanent yellow are added. The above raw materials are placed into the reactor in sequence and mixed. The mixture is heated to 40°C, stirred for 90 minutes, and then filtered to obtain the anti-high frequency blue light spray.

[0084] (2) Put the anti-high frequency blue light spray into the sprayer and spray it onto the surface of the glass slide. Wipe the substrate surface with the accompanying soft cloth to form an anti-high frequency blue light spray coating.

[0085] The high-frequency blue light protection test of the anti-high-frequency blue light spray coating prepared in this embodiment is shown in Example 5, and the test results are shown in Table 2.

[0086] Comparative Example 3

[0087] This embodiment describes a method for preparing an anti-high-frequency blue light spray for electronic screens based on modified coating materials, comprising the following raw materials by weight: 2 parts by weight of polyvinyl butyral, 100 parts by weight of 95% ethanol, 1.5 parts by weight of polyvinylpyrrolidone, and 2 parts by weight of nano zinc oxide.

[0088] The preparation method of an electronic screen anti-high-frequency blue light spray based on modified coating material in this embodiment includes the following steps:

[0089] (1) Using a glass slide as the coating substrate material, polyvinyl butyral is dissolved in 95% ethanol, then polyvinylpyrrolidone and nano zinc oxide are added. The above raw materials are placed into the reactor in sequence and mixed. The mixture is heated to 45°C, stirred for 90 minutes, and then filtered to obtain an anti-high frequency blue light spray.

[0090] (2) Put the anti-high frequency blue light spray into the sprayer and spray it onto the surface of the glass slide. Wipe the substrate surface with the accompanying soft cloth to form an anti-high frequency blue light spray coating.

[0091] The high-frequency blue light protection test of the anti-high-frequency blue light spray coating prepared in this embodiment is shown in Example 5, and the test results are shown in Table 2.

[0092] Comparative Example 4

[0093] This embodiment of an electronic screen anti-high frequency blue light spray based on modified coating material comprises the following raw materials by weight: 2 parts by weight of polyvinyl butyral, 100 parts by weight of 95% ethanol, 1.5 parts by weight of polyvinylpyrrolidone, and 2 parts by weight of nano-calcium carbonate (50nm).

[0094] The preparation method of an electronic screen anti-high-frequency blue light spray based on modified coating material in this embodiment includes the following steps:

[0095] (1) Using a glass slide as the coating substrate material, polyvinyl butyral was dissolved in 95% ethanol, and then polyvinylpyrrolidone and nano calcium carbonate (50nm) were added. The above raw materials were placed into the reactor in sequence and mixed. The mixture was heated to 45°C, stirred for 90 minutes, and then filtered to obtain the anti-high frequency blue light spray.

[0096] (2) Put the anti-high frequency blue light spray into the sprayer and spray it onto the surface of the glass slide. Wipe the substrate surface with the accompanying soft cloth to form an anti-high frequency blue light spray coating.

[0097] The high-frequency blue light protection test of the anti-high-frequency blue light spray coating prepared in this embodiment is shown in Example 5, and the test results are shown in Table 2.

[0098] Comparative Example 5

[0099] Commercially available blue light blocking coated eyeglasses;

[0100] The high-frequency blue light protection test of the anti-high-frequency blue light spray coating prepared in this embodiment is shown in Example 5, and the test results are shown in Table 2.

[0101] Table 1

[0102]

[0103] Table 2

[0104] Group Transmittance (%) Blue light barrier rate (%) UV barrier rate (%) Example 5 68.6 94.7 89.0 Comparative Example 2 29.5 92.0 86.0 Comparative Example 3 72.8 30.8 32.5 Comparative Example 4 65.5 44.8 51.4 Comparative Example 5 94.3 18.8 95.8

[0105] Table 1 shows the coating performance tests for Examples 1-4 and Comparative Example 1. The results in Table 1 indicate that Comparative Example 1 has the worst film strength. The peeling difficulty of Examples 2-4 is similar, with film strength increasing sequentially. Considering the overall film formation time, Example 2 exhibits the best overall performance. This is because polyvinylpyrrolidone (PVP) can act as a plasticizer for the polyvinyl butyral polymer chains, reducing the intermolecular forces between the polyvinyl butyral chains, making the film more flexible and less prone to breakage. Furthermore, PPVP can enhance the compatibility between polyvinyl butyral and the solvent (ethanol), resulting in a more uniform distribution of polymer chains in the solution, thereby reducing the formation of regions with different polymer densities during the drying process.

[0106] Table 2 shows the blue light blocking performance of Example 5 and Comparative Examples 2-5. The results in Table 2 show that the blue light blocking effect of adding permanent yellow to Comparative Example 2 is similar to that of Example 5, while the blue light blocking effect of Comparative Examples 2 and 3 is significantly lower than that of the Example. This indicates that the yellow substance has a better blue light blocking effect than inorganic nanoparticles.

[0107] Example 5 exhibits the highest blue light blocking rate while maintaining good light transmittance. This is because lutein absorbs blue light through its conjugated structure, acting as a natural blue light filter. Furthermore, the addition of polyvinylpyrrolidone increases optical transparency, resulting in an anti-blue light spray coating prepared in this invention that not only has a high blue light blocking rate but also superior light transmittance. Lutein consists of a hydrocarbon backbone with alternating single and double carbon bonds. This conjugated structure produces its characteristic yellow to orange hue, enabling lutein to absorb light in the blue region of the spectrum. Blue light absorption occurs due to the excitation of electrons jumping from the highest occupied molecular orbital to the lowest unoccupied molecular orbital in lutein. The energy absorbed by the lutein molecule can be dissipated as heat or re-emitted as light. In addition, lutein can convert the absorbed energy into other forms of energy, such as vibrational or rotational energy, through non-radiative processes.

[0108] Figure 1 A schematic diagram illustrating the absorption of blue light by a blue light-blocking coating material. Figure 1 It is known that the blue light coating material achieves the effect of shielding blue light by absorbing blue light in visible light.

[0109] Figure 2 Here is a scanning electron microscope image of the anti-blue light spray coating of Example 5, from... Figure 2 It can be seen that the blue light shielding agent and the coating material are combined in a physical way without any chemical reaction.

[0110] The above-described specific embodiments are preferred embodiments of the present invention and are not intended to limit the present invention. Any other changes or equivalent substitutions made without departing from the technical solution of the present invention are included within the protection scope of the present invention.

Claims

1. A high-frequency blue light blocking spray for electronic screens based on modified coating materials, characterized in that, Includes the following components by mass: 80-100 parts ethanol; 1-10 parts of polyvinyl butyral; Polyvinylpyrrolidone 0.1–10 parts; Blue light shielding agent 0.1 to 1 part; The blue light shielding agent is lutein.

2. The preparation method of the electronic screen anti-high-frequency blue light spray based on modified coating material according to claim 1, characterized in that, Includes the following steps: (1) Add polyvinyl butyral to ethanol, and stir in a sealed container until dissolved to obtain a polyvinyl butyral-ethanol mixture; (2) Add polyvinylpyrrolidone to the polyvinyl butyral-ethanol mixture and stir until dissolved to obtain a polyvinyl butyral-ethanol-polyvinylpyrrolidone mixture; (3) Add the blue light shielding agent to the polyvinyl butyral-ethanol-polyvinylpyrrolidone mixture, stir and mix well to obtain the anti-high frequency blue light spray.

3. The preparation method of an electronic screen anti-high-frequency blue light spray based on a modified coating material according to claim 2, characterized in that, In step (2), the stirring temperature is 40-45℃.

4. The application of the electronic screen anti-high-frequency blue light spray based on modified coating material as described in claim 1, characterized in that, The spray is applied to the surface of the glass slide, and then the substrate surface is wiped to form a high-frequency blue light protection spray coating.

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