Coating assembly and display module

Abstract

The application provides a coating assembly and a display module. The coating assembly comprises a substrate and a coating. The preparation raw material of the coating comprises a hydrophilic resin and a particle dispersion liquid. The particle dispersion liquid has mesoporous particles and hollow particles. The mesoporous particles and the hollow particles can not only improve the hardness of the coating, but also reduce the reflectivity of the coating. The mesoporous particles are adsorbed on the surface of the hollow particles through hydrolysis and condensation. The surface of the mesoporous particles is grafted with an isocyanatoethyl acrylate group. The hydrophilic resin has multiple functionalities. The molecular structure of the hydrophilic resin has multiple polar functional groups. Since the hydrophilic resin itself has hydrophilicity, the hydrophilic resin can achieve super hydrophilicity after being deposited on the surface of the mesoporous particles with micro-nano structures, thereby avoiding foreign matter stacking and facilitating cleaning.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a coating component and a display module. Background Technology

[0002] During use, display panels are often scratched, and image clarity is also affected by external light sources. Therefore, it is necessary to treat the surface of the display panel to reduce the reflection of external light sources and improve image clarity.

[0003] Currently, anti-reflective coatings are typically applied to the surface of display panels to reduce reflections from external light sources and improve image clarity. However, anti-reflective coatings generally have low reflectivity, which is difficult to achieve with simple resin coatings. Furthermore, when display panels are used outdoors, outdoor dust particles may accumulate on the panel surface, affecting display performance.

[0004] Therefore, it is necessary to provide a coating component and a display module to improve this defect. Summary of the Invention

[0005] The embodiments of this application provide a coating component and a display module that not only have a low reflectivity to reduce the reflection of external light sources and improve image clarity, but also have superhydrophilicity for easy cleaning.

[0006] Embodiments of this application provide a coating assembly, comprising: Substrate; A coating is applied to the surface of the substrate, and the raw materials for preparing the coating include the following components: a hydrophilic resin and a particle dispersion. The particle dispersion contains mesoporous particles and hollow particles. The particle size of the mesoporous particles is smaller than that of the hollow particles. The mesoporous particles are adsorbed onto the surface of the hollow particles through hydrolysis and condensation. The surface of the mesoporous particles is grafted with isocyanate groups. The hydrophilic resin has multiple functionalities and its molecular structure contains multiple polar functional groups.

[0007] According to one embodiment of this application, the mesoporous particles have a particle size greater than or equal to 1 nanometer and less than or equal to 100 nanometers, and the hollow particles have a particle size greater than or equal to 10 nanometers and less than or equal to 200 nanometers.

[0008] According to one embodiment of this application, the mesoporous particles are one of mesoporous silica particles, mesoporous polycarbonate particles, and mesoporous polymethyl methacrylate particles, and the hollow particles are one of hollow silica particles, hollow polycarbonate particles, and hollow polymethyl methacrylate particles.

[0009] According to one embodiment of this application, the functionality of the hydrophilic resin is greater than or equal to 4 and less than or equal to 10, and the molecular structure of the hydrophilic resin has hydroxyl groups, amide groups, ester groups and ether bonds.

[0010] According to one embodiment of this application, the molecular structure of the hydrophilic resin is as follows: (I).

[0011] According to one embodiment of this application, the raw materials for preparing the coating, by weight, further include: polar acrylic monomers and photoinitiators, and the content of each component in the raw materials for preparing the coating is as follows: 100 parts of particle dispersion; 50 to 200 parts of hydrophilic resin; 10 to 40 parts of polar acrylic monomers; 1 to 10 parts of photoinitiator; Solvent: 1000 to 5000 parts.

[0012] According to one embodiment of this application, the polar acrylic monomer is selected from at least one of 2-carboxyethyl acrylate, 4-hydroxybutyl vinyl ether, hydroxyethyl acrylate, hydroxyethyl methacrylate, tetrahydrofuran acrylate, tetrahydrofuran methacrylate, glycidyl acrylate, and cyclotrimethylolpropane acrylate.

[0013] According to one embodiment of this application, the photoinitiator includes at least one of type I photoinitiator and type II photoinitiator; The type I photoinitiator is selected from at least one of acetophenones, benzoins, acylphosphine oxides, and diacetic titanium compounds; the type II photoinitiator is selected from at least one of benzophenones and thioxanones.

[0014] According to one embodiment of this application, the dyn value of the surface of the substrate in contact with the coating is greater than or equal to 48 dyn / cm.

[0015] Embodiments of this application also provide a display module, including a display panel and a coating assembly as described above, the coating assembly being disposed on the surface of the display panel.

[0016] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a coating component and a display module. The coating component is disposed on the surface of the display panel of the display module. The coating component includes a substrate and a coating disposed on the surface of the substrate. The raw materials for preparing the coating include a hydrophilic resin and a particle dispersion. The particle dispersion contains mesoporous particles and hollow particles. The particle size of the mesoporous particles is smaller than that of the hollow particles. The mesoporous particles are adsorbed onto the surface of the hollow particles through hydrolysis and condensation. The surface of the mesoporous particles is grafted with isocyanate groups. The hydrophilic resin has multiple functionalities. The molecular structure of the hydrophilic resin has multiple polar functional groups. The use of mesoporous particles and hollow particles can not only improve the hardness of the coating, but also reduce the reflectivity of the coating. Since the hydrophilic resin itself is hydrophilic, the hydrophilic resin can achieve superhydrophilicity after being deposited on the surface of the mesoporous particles with micro-nano structures, avoiding the accumulation of foreign matter and facilitating cleaning. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the coating assembly provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of a display module provided in an embodiment of this application. Detailed Implementation

[0018] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. Directional terms used in this application, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative and understanding purposes and not for limiting the application. In the figures, structurally similar units are represented by the same reference numerals.

[0019] The present application will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiments of this application provide a coating component that not only has a low reflectivity to reduce reflection from external light sources and improve image clarity, but also has superhydrophilicity for easy cleaning.

[0021] Combination Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a coating assembly provided in an embodiment of this application. The coating assembly 1 includes a substrate 11 and a coating 12, with the coating 12 disposed on the surface of the substrate 11.

[0022] The raw materials for preparing coating 12 include a hydrophilic resin and a particle dispersion. The particle dispersion contains mesoporous particles 121 and hollow particles 122. The particle size of mesoporous particles 121 is smaller than that of hollow particles 122. The mesoporous particles 121 are adsorbed onto the surface of hollow particles 122 through hydrolysis and condensation. The surface of the mesoporous particles 121 is grafted with isocyanate groups. The hydrophilic resin 123 is multifunctional, and its molecular structure contains multiple polar functional groups.

[0023] Compared to existing simple resin antireflective coatings, the embodiments of this application, by adding mesoporous and hollow particles to the coating 12, not only increase the hardness of the coating 12 but also reduce its reflectivity. Furthermore, by hydrolyzing and condensing mesoporous particles 121 onto the surface of hollow particles 122, and grafting isocyanate groups onto the surface of the mesoporous particles 121, and considering the multifunctionality of the hydrophilic resin 123 and the presence of multiple polar functional groups in its molecular structure, the hydrophilic resin 123, after being mixed with the particle dispersion, can deposit on the surface of the micro-nano structured mesoporous particles 121, thus achieving superhydrophilicity. Because the coating 12 is superhydrophilic, water (liquid) diffuses completely, lying on the surface of the coating 12 in the form of a flat film, rather than existing as droplets. Dirt and other staining materials on the surface of the coating 12 can be easily washed away by the super-diffused water layer, thus preventing indoor and outdoor dust particles from accumulating on the display panel surface and affecting the display effect, facilitating cleaning.

[0024] In some embodiments, the mesoporous particles 121 have a particle size greater than or equal to 1 nanometer and less than or equal to 100 nanometers, and the hollow particles 122 have a particle size greater than or equal to 10 nanometers and less than or equal to 200 nanometers.

[0025] The coating 12 may contain mesoporous particles 121 of one size or multiple sizes. The particle size of the mesoporous particles 121 may be, but is not limited to, 1 nanometer, 10 nanometer, 30 nanometer, 50 nanometer, 70 nanometer, or 100 nanometer. The coating 12 may also contain hollow particles 122 of one size or multiple sizes. The particle size of the hollow particles 122 may be, but is not limited to, 10 nanometer, 30 nanometer, 50 nanometer, 70 nanometer, or 100 nanometer, as long as it is larger than the particle size of the mesoporous particles 121.

[0026] Preferably, the mesoporous particles 121 have a particle size greater than or equal to 10 nanometers and less than or equal to 50 nanometers, and the hollow particles 122 have a particle size greater than or equal to 50 nanometers and less than or equal to 150 nanometers.

[0027] In one embodiment, the mesoporous particles 121 in the coating 12 have a particle size of 20 nanometers, and the hollow particles 122 have a particle size of 100 nanometers.

[0028] In some embodiments, the mesoporous particles 121 are one of mesoporous silica particles, mesoporous polycarbonate particles, and mesoporous polymethyl methacrylate particles, and the hollow particles 122 are one of hollow silica particles, hollow polycarbonate particles, and hollow polymethyl methacrylate particles.

[0029] In one embodiment, the mesoporous particles 121 are mesoporous silica particles, and the hollow particles 122 are hollow silica particles; that is, the mesoporous particles 121 and the hollow particles 122 are made of the same material, silica. Since the refractive index of silica is close to that of hydrophilic resin, choosing silica as the material for the mesoporous particles 121 and the hollow particles 122 avoids affecting the transmittance of the coating 12, ensuring that the transmittance of the coating 12 is greater than 95%.

[0030] In some embodiments, the functionality of the hydrophilic resin is greater than or equal to 4 and less than or equal to 10, and the molecular structure of the hydrophilic resin contains hydroxyl, amide, ester, and ether bonds. By limiting the functionality of the hydrophilic resin to between 4 and 10, it is possible to avoid the poor mechanical hardness of the coating 12 due to low hinge degree caused by excessively low functionality of the hydrophilic resin, and to avoid the brittleness of the coating 12 due to excessively high hinge degree caused by excessively high functionality of the hydrophilic resin.

[0031] In one embodiment, the hydrophilic resin has a functionality of 6, and the molecular structure of the hydrophilic resin is as follows: (I).

[0032] Because hydrophilic resins have polar functional groups such as hydroxyl, amide, ester and ether bonds in their molecular structure, they have good hydrophilic properties. When hydrophilic resins are deposited on the surface of mesoporous particles with micro-nano structures, the surface of the coating can achieve superhydrophilicity, making it easy to clean.

[0033] In other embodiments, the functionality of the hydrophilic resin is not limited to 6 as described in the above embodiments. The functionality of the hydrophilic resin can also be 4, 5, 7, 9, or 10, as long as it is between 4 and 10. In actual preparation, hydrophilic resins with different functionalities can be synthesized using synthetic raw materials.

[0034] In some embodiments, the thickness of coating 12 is greater than or equal to 10 nanometers and less than or equal to 1000 nanometers.

[0035] Preferably, the thickness of coating 12 is greater than or equal to 50 nanometers and less than or equal to 200 nanometers.

[0036] In some embodiments, the raw materials for preparing the coating, by weight and using the particle dispersion as a standard, include the following components: 100 parts of particle dispersion, 50 to 200 parts of hydrophilic resin, 10 to 40 parts of polar acrylic monomer, 1 to 10 parts of photoinitiator, and 1000 to 5000 parts of solvent.

[0037] In some embodiments, the polar acrylic monomer is selected from at least one of: 2-carboxyethyl acrylate, 4-hydroxybutyl vinyl ether, hydroxyethyl acrylate, hydroxyethyl methacrylate, tetrahydrofuran acrylate, tetrahydrofuran methacrylate, glycidyl acrylate, and cyclotrimethylolpropane acrylate.

[0038] In some embodiments, the photoinitiator includes at least one of type I photoinitiator and type II photoinitiator, wherein the type I photoinitiator is selected from at least one of acetophenone, benzoin, acylphosphine oxide and diacetic titanium compounds, and the type II photoinitiator is selected from at least one of benzophenone and thioxanone.

[0039] In some embodiments, the solvent is selected from alcohols, esters, ketones and benzenes.

[0040] Specifically, alcohols can be selected from methanol, ethanol and isopropanol; esters can be selected from ethyl acetate, propyl acetate and butyl acetate; ketones can be selected from acetone, butanone and cyclohexanone; and benzenes can be selected from toluene or xylene.

[0041] In some embodiments, the dyne value of the surface of the substrate 11 in contact with the coating 12 is greater than or equal to 48 dyn / cm. By treating the surface of the substrate 11, including corona treatment, plasma treatment, flame treatment, etc., the dyne value of the surface of the treated substrate 11 is made greater than or equal to 48 dyn / cm, thereby increasing the adhesion between the coating 12 and the substrate 11 and avoiding problems such as warping or peeling of the coating 12.

[0042] In the implementation of this application, the preparation process of the particle dispersion is as follows: Step S1: Mesoporous particles 121 and hollow particles 122 are dispersed in ultrapure water and ethanol. Under the action of alkali (sodium hydroxide), a dehydration condensation reaction occurs, causing the small-sized mesoporous particles 121 to adsorb onto the surrounding surface of the large-sized hollow particles 122. The specific process is shown in equation (‖). (‖).

[0043] Step S2: The particle dispersion modified in step S1 was added to ethyl isocyanate, and reacted at 60°C for 4 hours under the catalysis of dibutyltin dilaurate to obtain the ethyl isocyanate-modified particle dispersion. The specific process is shown in formula (III): (III).

[0044] In the implementation of this application, the preparation process of the hydrophilic resin is as follows: Step S1: Dipentaerythritol and isophorone diisocyanate were reacted at 60°C for 4 h under the catalysis of dibutyltin dilaurate to obtain an isocyanate-terminated prepolymer, as shown in formula (IV). (Ⅳ).

[0045] Step S2: The isocyanate-terminated prepolymer obtained in step S1 is reacted with pentaerythritol triacrylate at 60°C for 4 hours under dibutyltin dilaurate catalysis to obtain a hexafunctional polyurethane acrylate, as shown in formula (V): (V).

[0046] The coating components involved in the following embodiments are prepared in the following manner: Example 1 This embodiment provides a coating component: 100 parts of particle dispersion, 50 parts of hydrophilic resin, 10 parts of tetrahydrofuran acrylate, and 4 parts of 1 A coating is formed by mixing hydroxycyclohexylphenyl ketone and 1000 parts of isopropanol; the substrate surface is subjected to corona treatment to achieve a dyn value greater than or equal to 48 dyn / cm; the coating is then applied to the substrate surface by roller coating using a wet coating method; the solvent is dried in an oven at 90°C; and finally, it is cured by ultraviolet light at a curing energy of 50 mJ / cm. 2 The resulting coated component has a coating thickness of 550 nanometers.

[0047] Example 2 This embodiment provides a coating component: 100 parts of particle dispersion, 100 parts of hydrophilic resin, 20 parts of cyclotrimethylolpropane acrylate, and 4 parts of 1 A coating is formed by mixing hydroxycyclohexylphenyl ketone and 2000 parts of butyl acetate; the substrate surface is subjected to corona treatment to achieve a dyn value greater than or equal to 48 dyn / cm; the coating is then applied to the substrate surface by roller coating using a wet coating method; the solvent is dried in an oven at 90°C; and finally, it is cured by ultraviolet light at a curing energy of 50 mJ / cm². 2 The resulting coated component has a coating thickness of 550 nanometers.

[0048] Example 3 This embodiment provides a coating component: 100 parts of particle dispersion, 150 parts of hydrophilic resin, 30 parts of 2-carboxyethyl acrylate, and 5 parts of 1 A coating is formed by mixing hydroxycyclohexylphenyl ketone and 3000 parts of methyl ethyl ketone; the substrate surface is corona treated to achieve a dyn value greater than or equal to 48 dyn / cm; the coating is then applied to the substrate surface by roller coating using a wet coating method; the solvent is dried in an oven at 90°C; and finally, it is cured by ultraviolet light at a curing energy of 50 mJ / cm. 2 The resulting coated component has a coating thickness of 550 nanometers.

[0049] Example 3 This embodiment provides a coating component: 100 parts of particle dispersion, 200 parts of hydrophilic resin, 40 parts of hydroxyethyl methacrylate, and 4 parts of 1 A coating is formed by mixing hydroxycyclohexylphenyl ketone and 2000 parts of ethyl acetate; the substrate surface is subjected to corona treatment to achieve a dyn value greater than or equal to 48 dyn / cm; the coating is then applied to the substrate surface by roller coating using a wet coating method; the solvent is dried in an oven at 90°C; and finally, it is cured by ultraviolet light at a curing energy of 50 mJ / cm². 2 The resulting coated component has a coating thickness of 550 nanometers.

[0050] The performance evaluation results are shown in Table 1:

[0051] Performance Evaluation Table 1 The results above show that the water contact angles of Examples 1 to 4 are all less than 10°, which gives the coated components excellent self-cleaning properties. The transmittance of Examples 1 to 4 is all greater than 95%, and the reflectance is all less than 1%, which gives the coated components excellent optical performance. The pencil hardness of Examples 1 to 4 is all greater than or equal to H, and the adhesion rating is 5B, which gives the coated components high hardness and prevents scratches when subjected to abrasion.

[0052] Embodiments of this application also provide a display module, combined with Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a display module provided in an embodiment of this application. The display module includes a display panel 2 and a coating component 1 as provided in any of the above embodiments. The coating component 2 is disposed on the surface of the display panel 1.

[0053] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a coating component and a display module. The coating component is disposed on the surface of the display panel of the display module. The coating component includes a substrate and a coating disposed on the surface of the substrate. The raw materials for preparing the coating include a hydrophilic resin and a particle dispersion. The particle dispersion contains mesoporous particles and hollow particles. The particle size of the mesoporous particles is smaller than that of the hollow particles. The mesoporous particles are adsorbed onto the surface of the hollow particles through hydrolysis and condensation. The surface of the mesoporous particles is grafted with isocyanate groups. The hydrophilic resin has multiple functionalities, and its molecular structure contains multiple polar functional groups. Utilizing mesoporous and hollow particles can not only improve the hardness of the coating but also reduce its reflectivity. Since the hydrophilic resin itself is hydrophilic, its deposition on the surface of the micro-nano structured mesoporous particles can achieve superhydrophilicity, preventing foreign matter accumulation and facilitating cleaning. Furthermore, the coating component provided in the embodiments of this application can be mass-produced using a roll coating process, thereby reducing production costs.

[0054] In summary, although the present application discloses the preferred embodiments as described above, the above preferred embodiments are not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A coating assembly, characterized in that, include: Substrate; A coating is applied to the surface of the substrate, and the raw materials for preparing the coating include the following components: a hydrophilic resin and a particle dispersion. The particle dispersion contains mesoporous particles and hollow particles. The particle size of the mesoporous particles is smaller than that of the hollow particles. The particle size of the mesoporous particles is greater than or equal to 1 nanometer and less than or equal to 100 nanometers. The mesoporous particles are adsorbed onto the surface of the hollow particles through hydrolysis and condensation. The surface of the mesoporous particles is grafted with isocyanate groups. The functionality of the hydrophilic resin is greater than or equal to 4 and less than or equal to 10. The molecular structure of the hydrophilic resin is as follows: （Ⅰ）； The raw materials for preparing the coating, by weight, further include: polar acrylic monomers and photoinitiators, and the content of each component in the raw materials for preparing the coating is as follows: 100 parts of particle dispersion; 50 to 200 parts of hydrophilic resin; 10 to 40 parts of polar acrylic monomers; 1 to 10 parts of photoinitiator; Solvent: 1000 to 5000 parts.

2. The coating assembly as claimed in claim 1, characterized in that, The hollow particles have a particle size greater than or equal to 10 nanometers and less than or equal to 200 nanometers.

3. The coating assembly as claimed in claim 1, characterized in that, The mesoporous particles are one of mesoporous silica particles, mesoporous polycarbonate particles, and mesoporous polymethyl methacrylate particles, and the hollow particles are one of hollow silica particles, hollow polycarbonate particles, and hollow polymethyl methacrylate particles.

4. The coating assembly as claimed in claim 1, characterized in that, The polar acrylic monomer is selected from at least one of 2-carboxyethyl acrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, tetrahydrofuran acrylate, tetrahydrofuran methacrylate, glycidyl acrylate, and cyclotrimethylolpropane acrylate.

5. The coating assembly as claimed in claim 1, characterized in that, The photoinitiator includes at least one of type I photoinitiator and type II photoinitiator; The type I photoinitiator is selected from at least one of acetophenones, benzoins, acylphosphine oxides, and diacetic titanium compounds; the type II photoinitiator is selected from at least one of benzophenones and thioxanones.

6. The coating assembly as claimed in claim 1, characterized in that, The dyn value of the surface of the substrate in contact with the coating is greater than or equal to 48 dyn / cm.

7. A display module, characterized in that, It includes a display panel and a coating assembly as described in any one of claims 1 to 6, the coating assembly being disposed on the surface of the display panel.

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