Blue light scattering plate and preparation method and application thereof

Abstract

The application provides a preparation method of a blue light scattering plate, comprising the following steps: preparing a first dispersion liquid precursor containing inorganic sub-micron particles, wherein the material of the inorganic sub-micron particles is a plurality of different inorganic materials, and the particle size of the inorganic sub-micron particles is 120 nm-500 nm; mixing the first dispersion liquid precursor and a polymer emulsion to obtain a first dispersion liquid; preparing a second dispersion liquid precursor containing inorganic nano-particles, wherein the material of the inorganic nano-particles is the same as or different from that of the inorganic sub-micron particles, and the particle size of the inorganic nano-particles is 30 nm-120 nm; mixing the second dispersion liquid precursor and the polymer emulsion to obtain a second dispersion liquid; and preparing the first dispersion liquid and the second dispersion liquid into a blue light scattering plate. The blue light scattering plate prepared by the application has a good Rayleigh scattering effect. The application further provides a blue light scattering plate and application of the blue light scattering plate in a Rayleigh scattering sunlight lamp system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blue light scattering plate, in particular to a blue light scattering plate and a preparation method and application thereof. BACKGROUND

[0002] Currently, it has been shown that people feel more comfortable in indoor environments with sunlight entering, sunlight reduces the stress and negative effects of people, enhances the pleasant mood and work efficiency, and improves the physical and mental health of people living in the room in the long run. However, sunlight cannot enter some places in the room, such as offices, conference rooms, underground shopping malls and other places without natural environment light. When there is no obvious view outside, these closed offices and rooms are easy to make people feel depressed. Therefore, the prior art provides a Rayleigh scattering sunlight lamp system, which creates a virtual sun and a scattering blue sky effect through the Rayleigh scattering sunlight lamp system, to create a more comfortable working environment for people.

[0003] However, the blue light scattering plate in the existing Rayleigh scattering sunlight lamp system has a high transmittance to blue light, and the blue light scattering plate produces weak Rayleigh scattering of blue light, resulting in poor Rayleigh scattering effect of the blue light scattering plate, so that the Rayleigh scattering sunlight lamp system cannot achieve the ideal effect. SUMMARY

[0004] Therefore, it is necessary to provide a preparation method of a blue light scattering plate capable of improving the Rayleigh scattering effect.

[0005] In addition, it is also necessary to provide a blue light scattering plate.

[0006] In addition, it is also necessary to provide an application of the blue light scattering plate in a Rayleigh scattering sunlight lamp system.

[0007] The present application at least one embodiment provides a preparation method of a blue light scattering plate, comprising the following steps:

[0008] Preparation of a first dispersion liquid precursor containing inorganic sub-micron particles, wherein the material of the inorganic sub-micron particles is a plurality of different inorganic materials, and the particle size of the inorganic sub-micron particles is 120nm-500nm;

[0009] Mixing the first dispersion liquid precursor and the polymer emulsion to obtain a first dispersion liquid;

[0010] Preparation of a second dispersion liquid precursor containing inorganic nano-particles, wherein the material of the inorganic nano-particles is the same as or different from the material of the inorganic sub-micron particles, and the particle size of the inorganic nano-particles is 30nm-120nm;

[0011] Mixing the second dispersion liquid precursor and the polymer emulsion to obtain a second dispersion liquid; and

[0012] preparing the first dispersion liquid and the second dispersion liquid into a blue light scattering plate;

[0013] wherein the preparing the first dispersion liquid and the second dispersion liquid into a blue light scattering plate specifically comprises any one of the following (1) to (4):

[0014] (1) mixing the first dispersion liquid and the second dispersion liquid in a predetermined ratio to obtain a mixed dispersion liquid;

[0015] casting the mixed dispersion liquid onto a mold or a transparent material substrate to obtain a mixed dispersion liquid casting layer; and

[0016] drying the mixed dispersion liquid casting layer to obtain a blue light scattering plate;

[0017] (2) casting the second dispersion liquid onto a mold or a transparent material substrate to obtain a first dispersion liquid casting layer;

[0018] casting the first dispersion liquid onto the first dispersion liquid casting layer to obtain a second dispersion liquid casting layer, and the first dispersion liquid casting layer and the second dispersion liquid casting layer combine to form an overall dispersion liquid casting layer; and

[0019] drying the overall dispersion liquid casting layer to obtain a blue light scattering plate;

[0020] (3) partially casting the first dispersion liquid onto part of the surface of a mold or part of the surface of a transparent material substrate to obtain a first dispersion liquid casting layer;

[0021] partially casting the second dispersion liquid onto another part of the surface of a mold or another part of the surface of a transparent material substrate to obtain a second dispersion liquid casting layer, and the first dispersion liquid casting layer and the second dispersion liquid casting layer combine to form an overall dispersion liquid casting layer; and

[0022] drying the overall dispersion liquid casting layer to obtain a blue light scattering plate;

[0023] (4) mixing two dispersion liquids with different mass fractions of inorganic submicron particles in the first dispersion liquid and inorganic nanoparticles in the second dispersion liquid to obtain a mixed dispersion liquid with different mass fractions;

[0024] casting the mixed dispersion liquid with different mass fractions onto a mold or a transparent material substrate to obtain a mixed dispersion liquid casting layer with different mass fractions; and

[0025] drying the mixed dispersion liquid casting layer with different mass fractions to obtain a blue light scattering plate;

[0026] In the above (1) to (4), the stirring speed and stirring time of the first dispersion liquid and the second dispersion liquid are different at the time of casting, and random distribution of different densities of particles is generated.

[0027] In some embodiments, the preparation method includes at least one of the following (1) to (2):

[0028] (1) In the first dispersion liquid, the mass fraction of the inorganic sub-micron particles is 0.05% to 5%;

[0029] (2) In the second dispersion liquid, the mass fraction of the inorganic nano-particles is 0.05% to 5%. In some embodiments, the preparation method includes at least one of the following (1) to (2):

[0030] (1) The preparation of the first dispersion liquid precursor containing inorganic sub-micron particles specifically includes the following steps:

[0031] Mixing the first inorganic material, the first dispersant, and the first diluent to obtain the first dispersion liquid precursor;

[0032] (2) The preparation of the second dispersion liquid precursor containing inorganic nano-particles specifically includes the following steps:

[0033] Mixing the second inorganic material, the second dispersant, and the second diluent to obtain the second dispersion liquid precursor. In some embodiments, the preparation method includes at least one of the following (1) to (2):

[0034] (1) The mixing of the first inorganic material, the first dispersant, and the first diluent specifically includes the following steps:

[0035] Adding 10 to 60 parts by weight of the first inorganic material, 1 to 20 parts by weight of the first dispersant, and 20 to 90 parts by weight of the first diluent to a stirrer for stirring, and then using a shear disperser for shear dispersion to obtain the first dispersion liquid precursor;

[0036] (2) The mixing of the first dispersion liquid precursor and the polymer emulsion specifically includes the following steps:

[0037] Adding 0.05 to 5 parts by weight of the first dispersion liquid precursor and 95 to 99.95 parts by weight of the polymer emulsion to a vacuum stirring disperser for shear dispersion and defoaming to obtain the first dispersion liquid.

[0038] In some embodiments, the preparation method includes at least one of the following (1) to (2):

[0039] (1) The mixing of the second inorganic material, the second dispersant, and the second diluent specifically includes the following steps:

[0040] The second dispersant precursor is obtained by adding 10 to 60 parts by weight of the second inorganic material, 1 to 20 parts by weight of the second dispersant, and 20 to 90 parts by weight of the second diluent to a shear disperser and performing shear dispersion.

[0041] (2) Mixing the second dispersant precursor and the polymer emulsion specifically includes the following steps:

[0042] The second dispersant is obtained by adding 0.05 to 5 parts by weight of the second dispersant precursor and 95 to 99.95 parts by weight of the polymer emulsion to a vacuum stirring disperser and performing shear dispersion and defoaming.

[0043] In some embodiments, the preparation method includes at least one of the following (1) to (5):

[0044] (1) The first inorganic material includes at least two of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, diiron trioxide, di-aluminum trioxide, tri-aluminum pentoxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene, and fused glass powder;

[0045] (2) The second inorganic material includes at least one of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, diiron trioxide, di-aluminum trioxide, tri-aluminum pentoxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene, and fused glass powder;

[0046] (3) The first dispersant and / or the second dispersant includes at least one of sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, sodium oleate, a carboxylate, a sulfate, a sulfonate, an alkyl aryl phosphate, an alkyl benzene sulfonate, a dialkyl sulfosuccinate, a polyoxyethylene alkyl phenol ether, a sorbitan alkylate, a polycarboxylate, a poly(meth)acrylic acid derivative, a maleic anhydride copolymer, and a polycarboxylic acid polymer;

[0047] (4) The first diluent and / or the second diluent includes at least one of deionized water, ethanol, dimethylbenzene, acetone, butanone, cyclohexanone, benzene, toluene, dimethylbenzene, n-butanol, and styrene;

[0048] (5) the polymer emulsion comprises a transparent water-based polymer emulsion or a transparent oil-based polymer emulsion; the transparent water-based polymer emulsion comprises at least one of a water-based polyurethane emulsion, a water-based epoxy resin emulsion, an acetone homologous emulsion, a propylene homologous emulsion, a pure propylene emulsion, an acetone propylene emulsion, a benzene propylene emulsion, an acetone homologous emulsion, a chloro partial emulsion, an acetone tertiary emulsion, an EVA emulsion, a ternary emulsion, a silicone propylene emulsion; the transparent oil-based polymer emulsion comprises at least one of a polyurethane emulsion, an epoxy resin emulsion, a solvent-free epoxy resin emulsion, a polymethyl methacrylate emulsion and a polycarbonate emulsion.

[0049] The blue light scattering plate provided by at least one embodiment of the present application comprises a transparent polymer matrix, inorganic submicron particles and inorganic nanoparticles, the material of the inorganic submicron particles is a plurality of different inorganic materials, the particle size of the inorganic submicron particles is 120 nm to 500 nm, the material of the inorganic nanoparticles is the same as or different from that of the inorganic submicron particles, the particle size of the inorganic nanoparticles is 30 nm to 120 nm, and the inorganic submicron particles and the inorganic nanoparticles are randomly distributed in the transparent polymer matrix.

[0050] In some embodiments, the material of the inorganic submicron particles comprises at least two of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, diiron trioxide, di-aluminum trioxide, tri-aluminum pentoxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene and fused glass powder; and / or

[0051] The material of the inorganic nanoparticles comprises at least one of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, diiron trioxide, di-aluminum trioxide, tri-aluminum pentoxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene and fused glass powder.

[0052] In some embodiments, the thickness of the blue light scattering plate is 0.1 mm to 10 mm.

[0053] The present application provides a blue light scattering plate prepared by the preparation method, or the application of the blue light scattering plate in a Rayleigh scattering sunlight lamp system.

[0054] The present application prepares a first dispersion liquid containing inorganic sub-micron particles and a second dispersion liquid containing inorganic nano-particles, controls the material of the inorganic sub-micron particles to be multiple different inorganic materials, controls the particle size of the inorganic sub-micron particles to be 120-500 nm, and controls the particle size of the inorganic nano-particles to be 30-120 nm, and then prepares a blue light scattering plate by multiple pouring methods. Since the particle size distribution of the particles in the blue light scattering plate is wide, i.e. 30-500 nm, the blue light scattering plate can block most of the blue light transmission. In addition, since the material of the inorganic sub-micron particles in the blue light scattering plate is multiple different inorganic materials, and since different inorganic materials have the characteristics of anisotropy and different refractive index, the particle density is randomly distributed, so that the blue light scattering plate can produce Rayleigh scattering of different degrees of scattering intensity for blue light. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 Preparation flow chart of the blue light scattering plate provided by the present application;

[0056] Figure 2 Particle size distribution graph of titanium dioxide particles in the first dispersion liquid precursor prepared in Example 1 of the present application;

[0057] Figure 3 Particle size distribution graph of zinc oxide particles in the second dispersion liquid precursor prepared in Example 1 of the present application;

[0058] Figure 4 Particle size distribution graph of silicon dioxide particles in the first dispersion liquid precursor prepared in Example 2 of the present application;

[0059] Figure 5 Particle size distribution graph of zirconium oxide particles in the second dispersion liquid precursor prepared in Example 2 of the present application;

[0060] Figure 6 Particle size distribution graph of zinc oxide particles in the first dispersion liquid precursor prepared in Example 3 of the present application;

[0061] Figure 7 Particle size distribution graph of titanium dioxide particles in the second dispersion liquid precursor prepared in Example 3 of the present application;

[0062] Figure 8 Particle size distribution graph of aluminum trioxide particles in the first dispersion liquid precursor prepared in Example 4 of the present application;

[0063] Figure 9 Particle size distribution graph of titanium dioxide particles in the second dispersion liquid precursor prepared in Example 4 of the present application;

[0064] Figure 10Particle size distribution of barium oxide particles in the first dispersion precursor prepared for Example 5 of the present application;

[0065] Figure 11 Particle size distribution of montmorillonite particles in the second dispersion precursor prepared for Example 5 of the present application;

[0066] Figure 12 SEM image of a blue light scattering plate prepared for Example 1 of the present application;

[0067] Figure 13 SEM image of a blue light scattering plate prepared for Example 2 of the present application;

[0068] Figure 14 SEM image of a blue light scattering plate prepared for Example 3 of the present application;

[0069] Figure 15 SEM image of a blue light scattering plate prepared for Example 4 of the present application;

[0070] Figure 16 SEM image of a blue light scattering plate prepared for Example 5 of the present application. DETAILED DESCRIPTION

[0071] For the purpose of promoting an understanding of the application, the application will be described in greater detail below with reference to the illustrative drawings. The preferred embodiments of the application are shown in the drawings. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0073] Referring now to the drawings Figure 1 At least one embodiment of the present application provides a method for preparing a blue light scattering plate, comprising the following steps:

[0074] Step S11, preparing a first dispersion containing a polymer emulsion and inorganic submicron particles.

[0075] Specifically, a first inorganic material, a first dispersant and a first diluent are mixed to obtain a first dispersion precursor, and the first dispersion precursor and a polymer emulsion are mixed to obtain a first dispersion.

[0076] More specifically, the first inorganic material 10-60 parts by weight, the first dispersant 1-20 parts by weight and the first diluent 20-90 parts by weight are added to a blender for high-speed stirring, then a shear disperser is used for strong shear dispersion, the rotational speed of the shear disperser is set to 3000 r / min-6000 r / min, the shear rate of the shear disperser is set to 10000 / s-100000 / s, and the first dispersion precursor is obtained after shear dispersion for 1 h-3 h; the first dispersion precursor 0.05-5 parts by weight and the polymer emulsion 95-99.95 parts by weight are added to a vacuum stirring disperser for shear dispersion and defoaming, the rotational speed of the vacuum stirring disperser is set to 600 r / min-2000 r / min, and the first dispersion is obtained after shear dispersion for 10 min-30 min.

[0077] The first inorganic material exists in the form of particles in the first dispersion precursor and the first dispersion. Specifically, the first inorganic material exists in the form of inorganic sub-micron particles in the first dispersion precursor and the first dispersion, and the particle size of the inorganic sub-micron particles is 120 nm-500 nm. The inorganic sub-micron particles can be randomly distributed in the first dispersion after the above steps. It can be understood that different dispersion speeds and stirring times can produce different particle density distributions.

[0078] In an embodiment, the mass fraction of the inorganic sub-micron particles in the first dispersion is 0.05%-5%.

[0079] The inorganic sub-micron particles are made of a plurality of different inorganic materials. In an embodiment, the first inorganic material includes at least two of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, ferric sesquioxide, aluminum sesquioxide, aluminum trioxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene, and molten glass powder.

[0080] In an embodiment, the first dispersant includes at least one of sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, sodium oleate, carboxylate, sulfate, sulfonate, alkyl aryl phosphate, alkyl benzene sulfonate, dialkyl sulfosuccinate, polyoxyethylene alkyl phenol ether, sorbitol alkylate, polycarboxylate, poly(meth)acrylic acid derivative, maleic anhydride copolymer, and polycarboxylic acid polymer.

[0081] In an embodiment, the first diluent includes at least one of deionized water, ethanol, dimethylbenzene, acetone, butanone, cyclohexanone, benzene, toluene, dimethylbenzene, n-butanol, and styrene.

[0082] In an embodiment, the polymer emulsion comprises a transparent waterborne polymer emulsion or a transparent oilborne polymer emulsion. In an embodiment, the transparent waterborne polymer emulsion comprises at least one of a waterborne polyurethane emulsion, a waterborne epoxy emulsion, a vinyl acetate homopolymer emulsion, a vinyl propylene homopolymer emulsion, a pure acrylic emulsion, a vinyl acetate-acrylic emulsion, a vinyl benzene-acrylic emulsion, a vinyl acetate- vinyl propylene emulsion, a vinyl chloride-acrylic emulsion, a vinyl acetate- vinyl versatate emulsion, a terpolymer emulsion, a silicone-acrylic emulsion. In an embodiment, the transparent oilborne polymer emulsion comprises at least one of a polyurethane emulsion, an epoxy emulsion, a solventless epoxy emulsion, a polymethyl methacrylate emulsion, and a polycarbonate emulsion.

[0083] Step S12, preparing a second dispersion liquid containing the polymer emulsion and inorganic nanoparticles.

[0084] Specifically, the second inorganic material, the second dispersant and the second diluent are mixed to obtain a second dispersion liquid precursor, and the second dispersion liquid precursor and the polymer emulsion are mixed to obtain the second dispersion liquid.

[0085] More specifically, 10-60 parts by weight of the second inorganic material, 1-20 parts by weight of the second dispersant and 20-90 parts by weight of the second diluent are added to a high-speed shearing disperser for shearing dispersion, and the rotational speed of the shearing disperser is set to 10000 r / min-14000 r / min, the linear speed of the shearing disperser is set to 30 m / s-45 m / s, and the shearing rate of the shearing disperser is set to 10000 / s-500000 / s, and the second dispersion liquid precursor is obtained after shearing for 1 h-3 h; 0.05-5 parts by weight of the second dispersion liquid precursor and 95-99.95 parts by weight of the polymer emulsion are added to a vacuum stirring disperser for shearing dispersion and defoaming, and the rotational speed of the vacuum stirring disperser is set to 600 r / min-2000 r / min, and the second dispersion liquid is obtained after shearing dispersion for 10 min-30 min.

[0086] In the second dispersion liquid precursor and the second dispersion liquid, the second inorganic material is in the form of particles. Specifically, the second inorganic material is in the form of inorganic nanoparticles in the second dispersion liquid precursor and the second dispersion liquid, and the particle size of the inorganic nanoparticles is 30 nm-120 nm. In the second dispersion liquid, the inorganic nanoparticles are randomly distributed in different densities. It can be understood that different dispersion speeds and stirring times can produce different particle density distributions.

[0087] In an embodiment, the mass fraction of the inorganic nanoparticles in the second dispersion is 0.05% to 5%. The mass fraction of the inorganic submicron particles in the first dispersion and the mass fraction of the inorganic nanoparticles in the second dispersion can be the same or different.

[0088] In an embodiment, the second inorganic material includes at least one of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, ferric sesquioxide, aluminum sesquioxide, aluminum trioxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene, and molten glass powder. The second inorganic material and the first inorganic material can be the same or different.

[0089] In an embodiment, the second dispersant includes at least one of sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, sodium oleate, carboxylate, sulfate, sulfonate, alkyl aryl phosphate, alkyl benzene sulfonate, dialkyl sulfosuccinate, polyoxyethylene alkyl phenol ether, sorbitol alkylate, polycarboxylate, poly(meth)acrylic acid derivative, maleic anhydride copolymer, and polycarboxylic acid polymer.

[0090] In an embodiment, the second diluent includes at least one of deionized water, ethanol, dimethylbenzene, acetone, butanone, cyclohexanone, benzene, toluene, xylene, n-butanol, and styrene.

[0091] Step S13, the first dispersion and the second dispersion are prepared into a blue light scattering plate.

[0092] In an embodiment, the preparation of the first dispersion and the second dispersion into a blue light scattering plate specifically includes the following steps:

[0093] (1) The first dispersion and the second dispersion are mixed in a predetermined ratio to obtain a mixed dispersion.

[0094] Specifically, 10 to 100 parts of the first dispersion and 10 to 100 parts of the second dispersion are mixed by weight to obtain the mixed dispersion.

[0095] (2) The mixed dispersion is cast onto a mold or a transparent material substrate to obtain a mixed dispersion cast layer.

[0096] In an embodiment, the material of the transparent material substrate includes at least one of polycarbonate, polyurethane, polymethyl methacrylate (acrylic or organic glass plastic), polyethylene terephthalate, transparent nylon, acrylonitrile-styrene copolymer, polystyrene, and glass.

[0097] (3) drying the mixed dispersion liquid casting layer to obtain a blue light scattering plate.

[0098] In an embodiment, the thickness of the mixed dispersion liquid casting layer after drying can be 0.1mm-10mm.

[0099] In another embodiment, the preparation of the first dispersion liquid and the second dispersion liquid into a blue light scattering plate specifically comprises the following steps:

[0100] (1) casting the second dispersion liquid onto a mold or a transparent material substrate to obtain a first dispersion liquid casting layer.

[0101] The material of the transparent material substrate is as described above and will not be described in detail here.

[0102] (2) casting the first dispersion liquid onto the first dispersion liquid casting layer to obtain a second dispersion liquid casting layer, and the first dispersion liquid casting layer and the second dispersion liquid casting layer combine to form an overall dispersion liquid casting layer.

[0103] (3) drying the overall dispersion liquid casting layer to obtain a blue light scattering plate.

[0104] In an embodiment, the total thickness of the overall dispersion liquid casting layer after drying can be 0.1mm-10mm.

[0105] In yet another embodiment, the preparation of the first dispersion liquid and the second dispersion liquid into a blue light scattering plate specifically comprises the following steps:

[0106] (1) partially casting the first dispersion liquid onto part of the surface of a mold or part of the surface of a transparent material substrate to obtain a first dispersion liquid casting layer.

[0107] The material of the transparent material substrate is as described above and will not be described in detail here.

[0108] (2) partially casting the second dispersion liquid onto another part of the surface of the mold or another part of the surface of the transparent material substrate to obtain a second dispersion liquid casting layer, and the first dispersion liquid casting layer and the second dispersion liquid casting layer combine to form an overall dispersion liquid casting layer.

[0109] (3) drying the overall dispersion liquid casting layer to obtain a blue light scattering plate.

[0110] In an embodiment, the thickness of the first dispersion liquid casting layer after drying can be 0.1mm-10mm.

[0111] In an embodiment, the thickness of the second dispersion liquid casting layer after drying can be 0.1mm-10mm.

[0112] In another embodiment, the preparation of the first dispersion and the second dispersion into a blue light scattering plate comprises the following steps:

[0113] (1) mixing two dispersions with different mass fractions of the inorganic sub-micron particles in the first dispersion and the inorganic nano-particles in the second dispersion to obtain a mixed dispersion with different mass fractions.

[0114] (2) pouring the mixed dispersion with different mass fractions onto a mold or a transparent material substrate to obtain a mixed dispersion pouring layer with different mass fractions.

[0115] (3) drying the mixed dispersion pouring layer with different mass fractions to obtain a blue light scattering plate.

[0116] It should be noted that different particle density distributions can be obtained by changing the mass fraction of the inorganic sub-micron particles in the first dispersion, the stirring uniformity of the first dispersion, the mass fraction of the inorganic nano-particles in the second dispersion, and the stirring uniformity of the second dispersion.

[0117] It can be understood that after the dispersion is poured onto the mold, the mold needs to be removed after the dispersion is solidified, and a whole blue light scattering plate is obtained.

[0118] In an embodiment, after the first dispersion and the second dispersion are mixed to obtain a mixed dispersion, the mixed dispersion can also be poured onto a transparent material substrate, and after the mixed dispersion is dried, a blue light scattering plate with a pouring layer adhered to the transparent material substrate is obtained. A layer of transparent material substrate can also be covered on the mixed dispersion, so that a blue light scattering plate with a mixed dispersion pouring layer located between two layers of transparent material substrate is obtained.

[0119] At least one embodiment of the present application provides a blue light scattering plate prepared by the above preparation method, the blue light scattering plate comprising a transparent polymer substrate, inorganic sub-micron particles and inorganic nano-particles.

[0120] The inorganic sub-micron particles and the inorganic nano-particles are dispersed in the transparent polymer substrate. In an embodiment, the inorganic sub-micron particles and the inorganic nano-particles are randomly distributed in the transparent polymer substrate.

[0121] In an embodiment, the structure of the blue light scattering plate can be a single layer structure. That is, the blue light scattering plate is a single transparent polymer substrate. Specifically, the blue light scattering plate only comprises a layer of the transparent polymer substrate, and the inorganic sub-micron particles and the inorganic nano-particles are dispersed in the transparent polymer substrate.

[0122] In an embodiment, the structure of the blue light scattering plate can also be a multi-layer structure. That is, the blue light scattering plate can be transparent material matrix-transparent polymer matrix or transparent material matrix-transparent polymer matrix-transparent material matrix.

[0123] Specifically, when the blue light scattering plate is transparent material matrix-transparent polymer matrix, the blue light scattering plate comprises a transparent material matrix and the transparent polymer matrix on the transparent material matrix, and the inorganic sub-micron particles and the inorganic nano-particles are dispersed in the transparent polymer matrix.

[0124] Specifically, when the blue light scattering plate is transparent material matrix-transparent polymer matrix-transparent material matrix, the blue light scattering plate comprises two layers of transparent material matrix and the transparent polymer matrix between the two layers of transparent material matrix, and the inorganic sub-micron particles and the inorganic nano-particles are dispersed in the transparent polymer matrix. Wherein, the transparent polymer matrix can be a liquid matrix, or a solid matrix.

[0125] Wherein, when the transparent polymer matrix is a liquid matrix, the transparent polymer matrix comprises a transparent water-based polymer emulsion or a transparent oil-based polymer emulsion. In an embodiment, the transparent water-based polymer emulsion comprises at least one of water-based polyurethane emulsion, water-based epoxy resin emulsion, vinyl acetate emulsion, propylene glycol emulsion, pure acrylic emulsion, vinyl acetate emulsion, benzene propylene emulsion, vinyl acetate emulsion, chlorinated emulsion, vinyl acetate emulsion, EVA emulsion, ternary emulsion, silicone propylene emulsion. In an embodiment, the transparent oil-based polymer emulsion comprises at least one of polyurethane emulsion, epoxy resin emulsion, solvent-free epoxy resin emulsion, polymethyl methacrylate emulsion, and polycarbonate emulsion.

[0126] In an embodiment, the material of the transparent material matrix comprises at least one of polycarbonate, polyurethane, polymethyl methacrylate (acrylic or organic glass plastic), polyethylene terephthalate, transparent nylon, acryl-styrene copolymer, polystyrene, and glass.

[0127] Wherein, the transparent polymer matrix can be a single-component structure, or a multi-component structure. Wherein, when the transparent polymer matrix is a multi-component structure, the transparent polymer matrix can be a three-dimensional network structure.

[0128] In an embodiment, the inorganic sub-micron particles have a particle size of 120 nm to 500 nm. The material of the inorganic sub-micron particles includes at least two of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, ferric oxide, aluminum oxide, aluminum oxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene, and fused glass powder.

[0129] In an embodiment, the inorganic nano-particles have a particle size of 30 nm to 120 nm. The material of the inorganic nano-particles is the same as or different from the material of the inorganic sub-micron particles. The material of the inorganic nano-particles includes at least one of titanium dioxide, silicon dioxide, zinc oxide, zirconium dioxide, ferric oxide, aluminum oxide, aluminum oxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene, and fused glass powder.

[0130] In an embodiment, the blue light scattering plate has a thickness of 0.1 mm to 10 mm.

[0131] At least one embodiment of the present application provides an application of the blue light scattering plate prepared by the above-mentioned preparation method in a Rayleigh scattering sunlight lamp system.

[0132] In an embodiment, the Rayleigh scattering sunlight lamp system can include light sources of different color temperatures to project light of different color temperatures, thereby changing the color of the blue light scattering plate and the color effect of light projection.

[0133] The present application prepares a first dispersion liquid containing inorganic sub-micron particles and a second dispersion liquid containing inorganic nano-particles, controls the material of the inorganic sub-micron particles to be a plurality of different inorganic materials, the particle size of the inorganic sub-micron particles to be 120 nm to 500 nm, and the particle size of the inorganic nano-particles to be 30 nm to 120 nm, and then prepares the blue light scattering plate by a plurality of pouring methods. Since the particle size distribution of the particles in the blue light scattering plate is wide, i.e., 30 nm to 500 nm, the blue light scattering plate can block most of the blue light transmission. In addition, since the material of the inorganic sub-micron particles in the blue light scattering plate is a plurality of different inorganic materials, and since different inorganic materials have the characteristics of anisotropy and different refractive indexes, the particle density is randomly distributed, thereby enabling the blue light scattering plate to produce Rayleigh scattering of different degrees of scattering intensity for blue light.

[0134] In summary, the present application has the following characteristics:

[0135] (I) The inorganic sub-micron particles and the inorganic nano-particles have different particle sizes, thus different refraction of incident light, and different scattering, resulting in different Rayleigh scattering of the blue light scattering plate.

[0136] (II) The inorganic sub-micron particles and the inorganic nano-particles have different materials, thus different refraction of incident light, resulting in more abundant Rayleigh scattering of the blue light scattering plate.

[0137] (III) One or more of the inorganic nano-particles or the inorganic sub-micron particles are combined, and the density of the particles is also different, different dispersion shear speed and dispersion time are used, resulting in random distribution of particles with different densities, thus different Rayleigh scattering of the blue light scattering plate, and abundant Rayleigh scattering levels of the blue light scattering plate.

[0138] (IV) Different mass fractions of the inorganic sub-micron particles and the inorganic nano-particles are used to prepare the blue light scattering plate, resulting in different Rayleigh scattering intensity of the blue light scattering plate.

[0139] (V) Different thicknesses of the blue light scattering plate produce different Rayleigh scattering effects, simulating the Rayleigh scattering scenarios of the morning, noon, and afternoon of the sky, resulting in the morning scattering of red, the noon scattering of blue, and the afternoon scattering of fire red.

[0140] The application is further illustrated by specific examples and comparative examples.

[0141] Example 1

[0142] (1) 10 parts of inorganic material titanium dioxide, 5 parts of dispersant sodium hexametaphosphate, and 85 parts of diluent deionized water were added to a high-speed mixer and fully stirred, then sheared and dispersed on a shearing dispersion machine, and the shearing dispersion machine was set to rotate at 3000 r / min, the shearing rate was 10000 / s, and the shearing time was 1 h, to obtain a first dispersion liquid precursor containing titanium dioxide sub-micron particles with a particle size of 120 nm to 500 nm. The particle size distribution of the titanium dioxide particles in the first dispersion liquid precursor is as follows: Figure 2 .

[0143] (2) 0.05 parts of the first dispersion liquid precursor and 99.95 parts of the water-based polyurethane emulsion are added to a vacuum stirring dispersion machine for shearing dispersion and defoaming, and the rotating speed of the vacuum stirring dispersion machine is set to 600 r / min. After shearing dispersion for 10 min, a first dispersion liquid containing titanium dioxide sub-micron particles with a particle size of 120 nm to 500 nm is obtained. In the first dispersion liquid, the mass fraction of the titanium dioxide sub-micron particles is 0.05%.

[0144] (3) 40 parts of the inorganic material zinc oxide, 5 parts of the dispersant sodium hexametaphosphate, and 55 parts of the diluent deionized water are added to a high-speed shearing dispersion machine for shearing dispersion, and the rotating speed of the high-speed shearing dispersion machine is set to 11000 r / min, the linear speed is 35 m / s, the shearing rate is 100000 / s, and the shearing time is 1 h. A second dispersion liquid precursor containing zinc oxide nanoparticles with a particle size of 30 nm to 120 nm is obtained. In the second dispersion liquid precursor, the particle size distribution of the zinc oxide particles is as shown in Figure 3 .

[0145] (4) 1 part of the second dispersion liquid precursor and 99 parts of the water-based polyurethane emulsion are added to a vacuum stirring dispersion machine for shearing dispersion and defoaming, and the rotating speed of the vacuum stirring dispersion machine is set to 600 r / min. After shearing dispersion for 10 min, a second dispersion liquid containing zinc oxide nanoparticles with a particle size of 30 nm to 120 nm is obtained. In the second dispersion liquid, the mass fraction of the zinc oxide nanoparticles is 1%.

[0146] (5) 50 parts of the first dispersion liquid and 50 parts of the second dispersion liquid are randomly poured onto the surface of a flat plate mold to form a dispersion liquid pouring layer with different particle size distributions and density distributions at different local positions.

[0147] (6) The dispersion liquid pouring layer is dried to obtain a blue light scattering plate with a thickness of 1 mm.

[0148] (7) Steps (1) to (6) are repeated to obtain a blue light scattering plate with a thickness of 3 mm.

[0149] Due to the anisotropy and different refractive indices of different materials, different density random distribution combinations of particles are generated, which enhances the Rayleigh scattering effect, so that most of the short-wavelength blue light is scattered, greatly reducing its transmittance, and making the blue light scattering plate more blue. As shown in Figure 12 The particle distribution diagram (SEM electron microscope scanning) of the blue light scattering plate is shown in the figure. As can be seen from the figure, most of the inorganic particles have a particle size of 50-500 nm, and the dispersed particles have different density random distributions in the local area.

[0150] Example 2

[0151] (1) 40 parts of inorganic material silicon dioxide, 10 parts of dispersant fatty acid hydroxyethane sulfonate, and 50 parts of diluent deionized water are added into a high-speed stirrer for fully stirring and uniformly mixing, and then are strongly sheared and dispersed on a shearing disperser, and the rotating speed of the shearing disperser is set to 4500 r / min, the shearing rate is 50000 / s, and the shearing time is 2 h, to obtain a first dispersion liquid precursor containing silicon dioxide sub-micron particles with a particle size of 120 nm to 500 nm. In the first dispersion liquid precursor, the particle size distribution of the silicon dioxide particles is as shown in Figure 4 .

[0152] (2) 0.3 parts of the first dispersion liquid precursor and 99.7 parts of the water-based epoxy resin emulsion are added into a vacuum stirring disperser for shearing dispersion and defoaming, and the rotating speed of the vacuum stirring disperser is set to 1200 r / min, and after shearing dispersion for 20 min, a first dispersion liquid containing silicon dioxide sub-micron particles with a particle size of 120 nm to 500 nm is obtained. In the first dispersion liquid, the mass fraction of the silicon dioxide sub-micron particles is 0.3%.

[0153] (3) 30 parts of inorganic material zirconium oxide, 10 parts of dispersant fatty acid hydroxyethane sulfonate, and 60 parts of diluent deionized water are added into an ultra-high-speed shearing disperser for shearing dispersion, and the rotating speed of the ultra-high-speed shearing disperser is set to 12000 r / min, the linear speed is 40 m / s, the shearing rate is 300000 / s, and the shearing time is 2 h, to obtain a second dispersion liquid precursor containing zirconium oxide nano-particles with a particle size of 30 nm to 120 nm. In the second dispersion liquid precursor, the particle size distribution of the zirconium oxide particles is as shown in Figure 5 .

[0154] (4) 2 parts of the second dispersion liquid precursor and 98 parts of the water-based epoxy resin emulsion are added into a vacuum stirring disperser for shearing dispersion and defoaming, and the rotating speed of the vacuum stirring disperser is set to 1000 r / min, and after shearing dispersion for 20 min, a second dispersion liquid containing zirconium oxide nano-particles with a particle size of 30 nm to 120 nm is obtained. In the second dispersion liquid, the mass fraction of the zirconium oxide nano-particles is 2%.

[0155] (5) 70 parts of the second dispersion liquid is poured into a flat plate mold to obtain a first dispersion liquid pouring layer; and 30 parts of the first dispersion liquid is poured onto the first dispersion liquid pouring layer to obtain a second dispersion liquid pouring layer.

[0156] (6) The first dispersion liquid pouring layer and the second dispersion liquid pouring layer are dried to obtain a blue light scattering plate with a thickness of 1 mm.

[0157] (7) repeat steps (1) to (6) to obtain a blue light scattering plate with a thickness of 3 mm.

[0158] The blue light scattering plate has different levels of particle size distribution, different anisotropy of the particle material, different refractive index, and inorganic nano and sub-micron particle materials can be randomly dispersed, forming different scattering, and producing strong Rayleigh scattering effect. As shown in Figure 13 The particle distribution diagram of the blue light scattering plate (SEM) is shown in the figure. As can be seen from the figure, most of the inorganic particles have a particle size of 50-500 nm, and the inorganic nano and sub-micron particles are distributed in a random and uneven manner.

[0159] Example 3

[0160] (1) 40 parts of inorganic material zinc oxide, 15 parts of dispersant alkyl benzene sulfonate, and 45 parts of diluent butanone were added to a high-speed stirrer and stirred uniformly, then sheared and dispersed on a shearing disperser, and the shearing disperser was set to rotate at 6000 r / min, the shearing rate was 10000 / s, and the shearing time was 3h, to obtain a first dispersion liquid precursor containing zinc oxide sub-micron particles with a particle size of 120nm-500nm. Among them, the particle size distribution of zinc oxide particles in the first dispersion liquid precursor is as shown in Figure 6 .

[0161] (2) 3 parts of the first dispersion liquid precursor and 97 parts of polyurethane emulsion were added to a vacuum stirring disperser for shearing dispersion and defoaming, and the vacuum stirring disperser was set to rotate at 1500 r / min, and shearing dispersion was carried out for 30 min to obtain a first dispersion liquid containing zinc oxide sub-micron particles with a particle size of 120nm-500nm. Among them, the mass fraction of zinc oxide sub-micron particles in the first dispersion liquid is 3%.

[0162] (3) 20 parts of inorganic material titanium dioxide, 15 parts of dispersant alkyl benzene sulfonate, and 65 parts of diluent butanone were added to an ultra-high-speed shearing disperser for shearing dispersion, and the ultra-high-speed shearing disperser was set to rotate at 14000 r / min, the linear velocity was 45 m / s, the shearing rate was 500000 / s, and the shearing time was 3h, to obtain a second dispersion liquid precursor containing titanium dioxide nano particles with a particle size of 30nm-120nm. Among them, the particle size distribution of titanium dioxide particles in the second dispersion liquid precursor is as shown in Figure 7 .

[0163] (4) 2.5 parts of the second dispersion liquid precursor and 97.5 parts of the polyurethane emulsion are added to a vacuum stirring dispersion machine for shearing dispersion and defoaming, and the rotating speed of the vacuum stirring dispersion machine is set to 1500 r / min. After shearing dispersion for 30 min, a second dispersion liquid containing titanium dioxide nanoparticles with a particle size of 30 nm to 120 nm is obtained. In the second dispersion liquid, the mass fraction of the titanium dioxide nanoparticles is 2.5%.

[0164] (5) 40 parts of the first dispersion liquid and 59 parts of the second dispersion liquid are mixed, and 1 part of the curing agent aziridine is added to obtain a mixed dispersion liquid. The mixed dispersion liquid is poured into a flat plate mold to obtain a mixed dispersion liquid pouring layer.

[0165] (6) The mixed dispersion liquid pouring layer is dried to obtain a blue light scattering plate with a thickness of 1 mm.

[0166] (7) Steps (1) to (6) are repeated to obtain a blue light scattering plate with a thickness of 3 mm.

[0167] The blue light scattering plate is prepared by using inorganic submicron particles and inorganic nanoparticles with different mass fractions, so that the blue light scattering plate produces different degrees of Rayleigh scattering for blue light. As shown in Figure 14 The blue light scattering plate particle distribution diagram (SEM electron microscope scanning) is shown. As can be seen from the diagram, most of the inorganic particles have a particle size of 50-500 nm, and the inorganic nanoparticles and submicron particles can be randomly dispersed in the blue light scattering plate and produce different effects of particle density aggregation distribution.

[0168] Example 4

[0169] (1) 60 parts of inorganic material aluminum trioxide, 20 parts of dispersant polyoxyethylene alkyl phenol ether, and 20 parts of diluent ethanol are added to a high-speed stirring machine for sufficient stirring, and then subjected to strong shearing dispersion on a shearing dispersion machine. The rotating speed of the shearing dispersion machine is set to 5000 r / min, the shearing rate is 80000 / s, and the shearing time is 2.5 h. A first dispersion liquid precursor containing aluminum trioxide submicron particles with a particle size of 120 nm to 500 nm is obtained. In the first dispersion liquid precursor, the particle size distribution of the aluminum trioxide particles is as shown in Figure 8 .

[0170] (2) 1 part of the first dispersion liquid precursor and 99 parts of the solvent-free epoxy resin emulsion were added to a vacuum stirring dispersion machine for shearing dispersion and degassing, and the rotation speed of the vacuum stirring dispersion machine was set to 2000 r / min. After shearing dispersion for 25 min, a first dispersion liquid containing aluminum oxide sub-micron particles with a particle size of 120 nm to 500 nm was obtained. In the first dispersion liquid, the mass fraction of the aluminum oxide sub-micron particles was 1%.

[0171] (3) 40 parts of the inorganic material titanium dioxide, 12 parts of the dispersant polyoxyethylene alkyl phenol ether, and 48 parts of the diluent ethanol were added to a high-speed shearing dispersion machine for shearing dispersion, and the rotation speed of the high-speed shearing dispersion machine was set to 12000 r / min, the linear speed was 40 m / s, the shearing rate was 400000 / s, and the shearing time was 2 h. A second dispersion liquid precursor containing titanium dioxide nanoparticles with a particle size of 30 nm to 120 nm was obtained. In the second dispersion liquid precursor, the particle size distribution of the titanium dioxide particles was as shown in Figure 9 .

[0172] (4) 4 parts of the second dispersion liquid precursor and 96 parts of the solvent-free epoxy resin emulsion were added to a vacuum stirring dispersion machine for shearing dispersion and degassing, and the rotation speed of the vacuum stirring dispersion machine was set to 1800 r / min. After shearing dispersion for 20 min, a second dispersion liquid containing titanium dioxide nanoparticles with a particle size of 30 nm to 120 nm was obtained. In the second dispersion liquid, the mass fraction of the titanium dioxide nanoparticles was 4%.

[0173] (5) 20 parts of the first dispersion liquid and 80 parts of the second dispersion liquid were mixed, and 1 part of the curing agent ethylenediamine was added to obtain a mixed dispersion liquid. The mixed dispersion liquid was then poured onto a transparent organic glass plate with a thickness of 2.0 mm.

[0174] (6) The mixed dispersion liquid pouring layer was dried to obtain a blue light scattering plate with a thickness of 1 mm.

[0175] (7) Steps (1) to (6) were repeated to obtain a blue light scattering plate with a thickness of 3 mm.

[0176] Due to the combination of the two types of inorganic nanoparticles and inorganic sub-micron particles, and the different contents of the particles, different refractions of incident light are generated, which makes the blue light scattering plate have rich Rayleigh scattering layer gradation. As shown in Figure 15 The particle distribution diagram (SEM electron microscope scanning) of the blue light scattering plate is shown in the figure. It can be seen from the figure that most of the inorganic particles have a particle size of 50-500 nm, and the inorganic nanoparticles and sub-micron particles can be randomly dispersed and distributed.

[0177] Example 5

[0178] (1) 15 parts of inorganic material barium oxide, 8 parts of dispersant sodium polycarboxylate, and 77 parts of diluent deionized water were added into a high-speed stirrer and stirred uniformly, then sheared and dispersed on a shearing disperser, and the shearing disperser was set to rotate at 5000 r / min, the shearing rate was 30000 / s, and the shearing time was 3 h to obtain a first dispersion liquid precursor containing barium oxide sub-micron particles with a particle size of 120 nm to 500 nm. In the first dispersion liquid precursor, the particle size distribution of the barium oxide particles was as follows: Figure 10 .

[0179] (2) 1.2 parts of the first dispersion liquid precursor and 98.8 parts of pure acrylic emulsion were added into a vacuum stirring disperser for shearing dispersion and defoaming, and the vacuum stirring disperser was set to rotate at 800 r / min, and after shearing dispersion for 10 min, a first dispersion liquid containing barium oxide sub-micron particles with a particle size of 120 nm to 500 nm was obtained. In the first dispersion liquid, the mass fraction of the barium oxide sub-micron particles was 1.2%.

[0180] (3) 20 parts of inorganic material montmorillonite, 16 parts of dispersant sodium polycarboxylate, and 64 parts of diluent deionized water were added into a high-speed shearing disperser for shearing dispersion, and the shearing disperser was set to rotate at 11000 r / min, the linear velocity was 35 m / s, the shearing rate was 250000 / s, and the shearing time was 2.5 h to obtain a second dispersion liquid precursor containing montmorillonite nano-particles with a particle size of 30 nm to 120 nm. In the second dispersion liquid precursor, the particle size distribution of the montmorillonite particles was as follows: Figure 11 .

[0181] (4) 3.5 parts of the second dispersion liquid precursor and 96.5 parts of pure acrylic emulsion were added into a vacuum stirring disperser for shearing dispersion and defoaming, and the vacuum stirring disperser was set to rotate at 1300 r / min, and after shearing dispersion for 20 min, a second dispersion liquid containing montmorillonite nano-particles with a particle size of 30 nm to 120 nm was obtained. In the second dispersion liquid, the mass fraction of the montmorillonite nano-particles was 3.5%.

[0182] (5) 60 parts of the first dispersion liquid and 40 parts of the second dispersion liquid were poured onto the surface of a flat plate mold, and the first dispersion liquid pouring layer and the second dispersion liquid pouring layer were located at different positions on the surface of the flat plate mold.

[0183] (6) The first dispersion liquid pouring layer and the second dispersion liquid pouring layer were dried to obtain a blue light scattering plate with a thickness of 1 mm.

[0184] (7) Steps (1) to (6) were repeated to obtain a blue light scattering plate with a thickness of 3 mm.

[0185] Due to the blue light scattering plate having locally different particle size distribution, different particle material anisotropy and different refractive index, and random dispersion of inorganic nano and sub-micron particles, different levels of local Rayleigh scattering are generated. As shown in Figure 16 The blue light scattering plate particle distribution diagram (SEM electron microscope scanning) is shown in Figure 16 It can be seen from

[0186] Comparative Example 1

[0187] The blue light scattering plate with a thickness of 1 mm and the blue light scattering plate with a thickness of 3 mm provided in the market were selected.

[0188] (1) The blue light scattering plates prepared in Examples 1-5 were respectively subjected to scanning electron microscope (SEM) test, Figures 12 to 16 respectively corresponding to Examples 1-5.

[0189] Please refer to Figures 12 to 16 It can be seen that the sub-micron particles and nano particles in the blue light scattering plates prepared in Examples 1-5 are randomly distributed in the polymer matrix, and the particle size of the sub-micron particles is 120-500 nm, and the particle size of the nano particles is 30-120 nm.

[0190] (2) The blue light transmittance of the blue light scattering plates prepared in Examples 1-5 and Comparative Example 1 was respectively tested, and the test results are shown in Table 1.

[0191] The blue light transmittance test of the blue light scattering plate is specifically: using a Cary 60 UV-Vis ultraviolet visible spectrophotometer to test the blue light transmittance of the blue light scattering plate.

[0192] Table 1 Blue light transmittance data table of the blue light scattering plates prepared in Examples 1-5 and Comparative Example 1

[0193]

[0194] From the test results in Table 1 above, it can be seen that the blue light transmittance of the blue light scattering plates prepared in Examples 1-5 is all below 16% for a wavelength of 400 nm, below 36% for a wavelength of 450 nm, and below 44% for a wavelength of 480 nm; while the blue light transmittance of the blue light scattering plate in Comparative Example 1 is above 37% for a wavelength of 400 nm, above 52% for a wavelength of 450 nm, and above 58% for a wavelength of 480 nm. This shows that the blue light scattering plates prepared in Examples 1-5 have a high scattering rate for blue light and have a strong Rayleigh scattering effect.

[0195] Each technical feature of the above-described embodiments can be combined with any other technical feature, and for the sake of brevity, not all possible combinations are described, but it is understood that the scope of the present disclosure encompasses all such possible combinations.

[0196] The above-described embodiments are merely representative of several embodiments of the present disclosure, and the description is relatively specific and detailed, but should not be construed as limiting the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are all within the scope of the present disclosure. Therefore, the scope of the patent of the present disclosure should be subject to the appended claims.

Claims

1. A method for preparing a blue light scattering plate, characterized in that, Includes the following steps: A first dispersion precursor containing inorganic submicron particles is prepared, wherein the inorganic submicron particles are made of various different inorganic materials, and the particle size of the inorganic submicron particles is 120 nm to 500 nm; the first dispersion precursor is mixed with a polymer emulsion to obtain a first dispersion; a second dispersion precursor containing inorganic nanoparticles is prepared, wherein the inorganic nanoparticles are made of a different material than the inorganic submicron particles, and the particle size of the inorganic nanoparticles is 30 nm to 120 nm; the second dispersion precursor is mixed with a polymer emulsion to obtain a second dispersion; and The first and second dispersions were used to prepare a blue light scattering plate. The inorganic submicron particles include at least two of the following: zinc oxide, zirconium dioxide, aluminum pentoxide, cerium oxide, chromium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, montmorillonite, graphene, and fused glass powder. Inorganic nanoparticles include at least one of the following: titanium dioxide, silicon dioxide, aluminum oxide, aluminum pentoxide, cerium oxide, chromium oxide, barium oxide, iron oxide, kaolin, bentonite, wollastonite, mica powder, quartz powder, barium sulfate, talc powder, calcium carbonate, graphene, and fused glass powder. Specifically, preparing the blue light scattering plate from the first dispersion and the second dispersion includes any one of the following (1) to (4): (1) The first dispersion and the second dispersion are mixed in a predetermined ratio to obtain a mixed dispersion; The mixed dispersion is poured into a mold or a transparent substrate to obtain a mixed dispersion casting layer; and The dried mixed dispersion was cast into a layer to obtain a blue light scattering plate; (2) The second dispersion is poured into a mold or a transparent substrate to obtain the first dispersion pouring layer; A first dispersion is poured onto a first dispersion casting layer to obtain a second dispersion casting layer, and the first and second dispersion casting layers are combined to form a monolithic dispersion casting layer; and The dried bulk dispersion was cast into a layer to obtain a blue light scattering plate; (3) The first dispersion liquid is partially poured onto a part of the surface of the mold or a part of the transparent material substrate to obtain the first dispersion liquid pouring layer; The second dispersion is partially poured onto another part of the surface of the mold or another part of the transparent material substrate to obtain a second dispersion casting layer, and the first dispersion casting layer and the second dispersion casting layer are combined to form an integral dispersion casting layer; and The dried bulk dispersion was cast into a layer to obtain a blue light scattering plate; (4) Two dispersions with different mass fractions of inorganic submicron particles in the first dispersion and inorganic nanoparticles in the second dispersion are mixed to obtain a mixed dispersion with different mass fractions. By casting mixed dispersions of different mass fractions onto a mold or a transparent substrate, casting layers of mixed dispersions with different mass fractions are obtained; and A blue light scattering plate was obtained by casting a mixture of dispersions with different mass fractions after drying. In the above (1) to (4), during the casting process, the stirring speed and stirring time of the first dispersion and the second dispersion are different, resulting in a random distribution of particle density.

2. The method for preparing the blue light scattering plate as described in claim 1, characterized in that, The preparation method includes at least one of the following (1) to (2): (1) In the first dispersion, the mass fraction of the inorganic submicron particles is 0.05%~5%; (2) In the second dispersion, the mass fraction of the inorganic nanoparticles is 0.05%~5%.

3. The method for preparing the blue light scattering plate as described in claim 1, characterized in that, The preparation method includes at least one of the following (1) to (2): (1) The preparation of the first dispersion precursor containing inorganic submicron particles specifically includes the following steps: Inorganic submicron particles, a first dispersant, and a first diluent are mixed to obtain a first dispersion precursor; (2) The preparation of the second dispersion precursor containing inorganic nanoparticles specifically includes the following steps: Inorganic nanoparticles, a second dispersant, and a second diluent are mixed to obtain a second dispersion precursor.

4. The method for preparing the blue light scattering plate as described in claim 3, characterized in that, The preparation method includes at least one of the following (1) to (2): (1) The mixing of inorganic submicron particles, the first dispersant and the first diluent specifically includes the following steps: By weight, 10-60 parts of the inorganic submicron particles, 1-20 parts of the first dispersant and 20-90 parts of the first diluent are added to a mixer and stirred, and then sheared and dispersed using a shear disperser to obtain the first dispersion precursor. (2) Mixing the first dispersion precursor and the polymer emulsion specifically includes the following steps: By weight, 0.05 to 5 parts of the first dispersion precursor and 95 to 99.95 parts of the polymer emulsion are added to a vacuum mixer for shear dispersion and degassing to obtain the first dispersion.

5. The method for preparing the blue light scattering plate as described in claim 3, characterized in that, The preparation method includes at least one of the following (1) to (2): (1) The mixing of inorganic nanoparticles, the second dispersant, and the second diluent specifically includes the following steps: By weight, 10-60 parts of the inorganic nanoparticles, 1-20 parts of the second dispersant, and 20-90 parts of the second diluent are added to a shear disperser for shear dispersion to obtain the second dispersion precursor. (2) Mixing the second dispersion precursor and the polymer emulsion specifically includes the following steps: By weight, 0.05 to 5 parts of the second dispersion precursor and 95 to 99.95 parts of the polymer emulsion are added to a vacuum mixer for shear dispersion and degassing to obtain the second dispersion.

6. The method for preparing a blue light scattering plate as described in any one of claims 3 to 5, characterized in that, The preparation method includes at least one of the following (1) to (3): (1) The first dispersant and / or the second dispersant comprises at least one of sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, sodium oleate, carboxylates, sulfate esters, sulfonates, alkyl aryl phosphates, alkylbenzene sulfonates, dialkyl sulfosuccinates, polyoxyethylene alkylphenol ethers, sorbitol alkylates, polycarboxylates, poly(meth)acrylic acid derivatives, maleic anhydride copolymers, and polycarboxylic acid polymers; (2) The first diluent and / or the second diluent includes at least one of deionized water, ethanol, xylene, acetone, butanone, cyclohexanone, benzene, toluene, n-butanol and styrene; (3) The polymer emulsion includes a transparent aqueous polymer emulsion or a transparent oily polymer emulsion; the transparent aqueous polymer emulsion includes at least one of aqueous polyurethane emulsion, aqueous epoxy resin emulsion, acetic acid homopolymer emulsion, acrylic homopolymer emulsion, pure acrylic emulsion, acetic acid acrylic emulsion, styrene acrylic emulsion, acetic acid cis emulsion, chlorovinylidene ester emulsion, acetic acid tert-ester emulsion, EVA emulsion, ternary emulsion, and silicone acrylic emulsion; the transparent oily polymer emulsion includes at least one of polyurethane emulsion, epoxy resin emulsion, solvent-free epoxy resin emulsion, polymethyl methacrylate emulsion, and polycarbonate emulsion.

7. The blue light scattering plate prepared by the preparation method according to any one of claims 1 to 6, characterized in that, It includes transparent polymer matrix, inorganic submicron particles and inorganic nanoparticles.

8. The blue light scattering plate as described in claim 7, characterized in that, The thickness of the blue light scattering plate is 0.1mm to 10mm.

9. A blue light scattering plate prepared by any one of claims 1 to 6, or the application of a blue light scattering plate prepared by any one of claims 7 to 8 in a Rayleigh scattering sunlight lamp system.

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