Ink color dimming film and dimming glass

Abstract

The present invention provides a water-ink color dimming film. The effective value of the voltage applied to the dimming film is U, in V; when U=0, the CIELab color coordinates of the dimming film in the transmission state are: 5≤L1≤45, ‑15≤a1≤10, ‑15≤b1≤10; when U≠0, the numerical range of the color coefficient X is: ‑2.0≤X≤1.5, where X=(U*a*b) / (L*d), in V / μm, L>0. The dimming film of the present invention can provide a wider range of user choices, and provide novel visual experience and functional applications for the fields of transportation, architectural decoration, display screens, smart windows, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of light control devices, and in particular to a water-ink color dimming film and dimming glass. Background Art

[0002] With the advancement of science and technology and the improvement of people's requirements for quality of life, dimming film, as an important part of modern material science, plays an important role in adjusting light, improving visual effects, preventing light pollution, and enhancing privacy protection.

[0003] A dimming film is an electronic light-control device. It is mainly composed of a light-control layer between two layers of transparent conductive films. When the electric field is turned on, the arrangement or state of the material in the light-control layer changes, thereby changing the light transmittance of the device, such as from low transmittance to high transmittance, or from high transmittance to low transmittance. Through the action of the electric field, a rapid conversion between the on-state and the off-state can be achieved. According to the different light-control mechanisms of the light-control layer, the dimming film can be divided into suspended particle dimming film, polymer dispersed liquid crystal dimming film, electrochemical reaction dimming film, etc.

[0004] Although the dimming film has been successfully developed for many years, the dark state of the dimming film is basically blue. In actual applications, some people do not like this cold color, but prefer other intermediate tones, which creates obstacles to its further development, not only limiting the customer's motivation to choose, but also limiting the application of the dimming film in more technical fields. Therefore, how to find a dimming film with other base colors in the dark state, solve the above problems in the current application of dimming film, and broaden the depth and width of its application has become one of the focuses of extensive attention of many forward-looking researchers in this field. Summary of the invention

[0005] The present invention mainly solves the problem that the current dimming film is basically blue in dark state, and provides a dimming film and dimming glass with ink color in dark state. The present invention can provide a wider range of user choices and provide novel visual experience and functional applications in the fields of transportation, building decoration, display screens, smart windows, etc.

[0006] According to a first aspect of the present invention, a dimming film is provided, comprising a first transparent substrate, a first transparent conductive layer, a light control layer, a second transparent conductive layer, and a second transparent substrate which are stacked in sequence; the thickness of the light control layer is d, in μm; the effective value of the voltage applied to the dimming film is U, in V; when U=0, the CIELab color coordinates of the dimming film in the transmission state are: 5≤L1≤45, -15≤a1≤10, -15≤b1≤10; when U≠0, the numerical range of the color coefficient X is: -2.0≤X≤1.5, wherein X=(U*a*b) / (L*d), in V / μm, and L>0.

[0007] In some possible implementations, the CIELab color coordinates of the dimming film in the transmission state are: 5≤L1≤40, -10≤a1≤5, -10≤b1≤5.

[0008] In some possible implementations, the CIELab color coordinates of the dimming film in the transmission state are: 5≤L1≤35, -5≤a1≤5, -8≤b1≤5.

[0009] In some possible implementations, the value range of the color coefficient X is: -1.5≤X≤1.0.

[0010] In some possible implementations, the value range of the color coefficient X is: -0.8≤X≤0.4.

[0011] In some possible implementations, the light control layer is at least one of a suspended particle light control layer, a polymer dispersed liquid crystal light control layer, or an electrochemical reaction light control layer.

[0012] Furthermore, the light-controlling layer is a suspended particle light-controlling layer, which includes at least three components: a polymer matrix, a suspension medium, and light-controlling particles, ie, electrically polarizable particles.

[0013] In some possible implementations, the light-controlling layer includes light-controlling particles, and the CIELab color coordinates of the light-controlling particles in a reflection state are: 1≤L2≤35, -10≤a2≤10, -10≤b2≤10.

[0014] In some possible implementations, the CIELab color coordinates of the light-controlling particles in the reflection state are: 2≤L2≤25, -5≤a2≤5, -5≤b2≤5.

[0015] In some possible implementations, the light-controlling particles are formed from raw materials including the following components: iodine, main group metal iodide, nitrogen-containing organic ligand, and yellow and / or orange nitrocellulose;

[0016] Furthermore, the mass ratio of the iodine, the main group metal iodide, the nitrogen-containing organic ligand and the yellow and / or orange nitrocellulose is 1:(0.2-1):(0.05-1):(0.01-3).

[0017] Furthermore, the mass ratio of the iodine, the main group metal iodide, the nitrogen-containing organic ligand and the yellow and / or orange nitrocellulose is 1:(0.4-0.7):(0.2-0.6):(0.1-2).

[0018] Furthermore, the main group metal iodide is selected from one or more of lithium iodide, sodium iodide, potassium iodide, rubidium iodide, cesium iodide, ammonium iodide, magnesium iodide, calcium iodide, strontium iodide, barium iodide, indium iodide, tin iodide and lead iodide.

[0019] Furthermore, the nitrogen-containing organic ligand is selected from nitrogen-containing heterocyclic carboxylic acid ligands and / or nitrogen-containing heterocyclic carboxylic acid ester ligands.

[0020] Furthermore, the nitrogen-containing organic ligand is selected from one or more compounds represented by formula (1) to formula (16):

[0021] In formula (1), X is (COOH) n or (COOR) n , n is an integer from 1 to 4;

[0022] In formula (2), X is (COOH) n or (COOR) n , n is an integer from 1 to 3;

[0023] In formula (3), X is (COOH) n or (COOR) n , n is an integer from 1 to 2;

[0024] In formula (4), X is (COOH) n or (COOR) n , n is an integer from 1 to 5;

[0025] In formula (5), X is (COOH) n or (COOR) n , n is an integer from 1 to 4;

[0026] In formula (6), X is (COOH) n or (COOR) n , n is an integer from 1 to 4;

[0027]

[0028] In formula (9), X is (COOH) n or (COOR) n , n is an integer from 1 to 7;

[0029] In formula (10), X is (COOH) n or (COOR) n , n is an integer from 1 to 7;

[0030] In formula (11), X is (COOH) n or (COOR)n , n is an integer from 1 to 6;

[0031]

[0032] In formulae (1) to (6) and (9) to (11), R is independently selected from C1 to C6 alkyl groups.

[0033] Furthermore, the particle length of the solid light-controlling particles is 50-800 nm; and the particle aspect ratio of the solid light-controlling particles is 2-30.

[0034] Furthermore, the CIELab color coordinates of the yellow and / or orange nitrocellulose in the reflection state are: 1≤L3≤25, -10≤a3≤10, 5≤b3≤85.

[0035] Furthermore, the CIELab color coordinates of the yellow and / or orange nitrocellulose in the reflection state are: 2≤L3≤15, -10≤a3≤10, 15≤b3≤80.

[0036] Furthermore, the yellow and / or orange nitrocellulose is prepared by reacting nitrocellulose with a yellow dye and / or an orange dye.

[0037] Furthermore, the yellow and / or orange dye is a reactive yellow dye and / or a reactive orange dye.

[0038] Further, the reactive yellow dye and / or reactive orange dye is selected from Reaction Orange 5 (CAS 70210-21-8), Reaction Yellow 16 (CAS12225-83-1), Reaction Yellow 37 (CAS12237-16-0), Reaction Orange 40 (CAS 61969-10-6), Reaction Orange 41 (CAS 61969-11-7), Reaction Orange 44 (CAS 61969-13-9), Reaction Orange 50 (CAS 61969-14-0), Reaction Yellow 51 (CAS 61969-33-3), Reaction Yellow 52 (CAS 61969-34-4), Reaction Yellow 57 (CAS 61969-35-5), Reaction Yellow 58 (CAS 61969-36-6), Reaction Yellow 59 (CAS 61969-37-7), Reaction Orange 61 (CAS 61969-38-8), 61969-15-1), Reaction Yellow 64 (CAS 61969-38-8), Reaction Orange 69 (CAS 61969-17-3), Reaction Yellow 70 (CAS 61969-39-9), Reaction Orange 70 (CAS 61969-18-4), Reaction Orange 71 (CAS 61969-19-5), Reaction Orange 84 (CAS 91261-29-9), Reaction Yellow 86 (CAS 61951-86-8), Reaction Yellow 87 (CAS 61969-40-2), Reaction Orange 107 (CAS 90597-79-8), Reaction Yellow 145 (CAS 93050-80-7), Reaction Yellow 160 (CAS129898-77-7), Reaction Yellow 161 (CAS198153-89-8), Reaction Yellow 162 (CAS At least one of reaction yellow 174 (CAS106359-91-5), reaction yellow 176 (CAS140876-15-9), reaction yellow 178 (CAS115099-55-3), reaction yellow 179 (CAS 93376-16-0), reaction yellow 185 (CAS111211-44-0), and reaction yellow 186 (CAS 84000-63-5).

[0039] The present invention also provides a method for preparing yellow and / or orange nitrocellulose, comprising:

[0040] S1) dyeing, adding yellow dye and / or orange dye and nitrocellulose to a mixed solution of an organic solvent and water, and reacting at a temperature of T1 for a time of t1;

[0041] S2) color fixation, adding a basic compound to the reaction solution of S1), raising the temperature, and reacting at a temperature of T2 for a time of t2;

[0042] S3) filtration, washing, and pH control.

[0043] Furthermore, the organic solvent is selected from organic solvents that are miscible with water and can dissolve nitrocellulose.

[0044] Furthermore, the organic solvent is selected from at least one of isoamyl acetate, ethyl acetate, isopropanol and acetone.

[0045] Furthermore, the T1 is ≥ 30°C.

[0046] Furthermore, the T2≤90°C.

[0047] Furthermore, the T2-T1≥10°C.

[0048] Furthermore, the t1 is 0.5 to 5 hours.

[0049] Furthermore, the t2 is 0.5 to 5 hours.

[0050] Furthermore, the pH value range is 6-8.

[0051] Furthermore, the weight ratio of the organic solvent to water is 3-10.

[0052] In some possible implementations, the light control layer is a polymer dispersed liquid crystal light control layer, which includes at least three components: a polymer matrix, a light control active component, namely, liquid crystal, and a dichroic dye.

[0053] Furthermore, the CIELab color coordinates of the dichroic dye in a reflection state are: 1≤L2≤35, -10≤a2≤10, -10≤b2≤10.

[0054] Furthermore, the CIELab color coordinates of the dichroic dye in a reflection state are: 2≤L2≤25, -5≤a2≤5, -5≤b2≤5.

[0055] In some possible implementations, the light-controlling layer is an electrochromic light-controlling layer, which includes at least three layers: an electrochromic layer, an electrolyte layer, and an ion storage layer, and the electrochromic layer includes an electrochromic active component.

[0056] Furthermore, the CIELab color coordinates of the electrochromic active component in the reflection state are: 1≤L2≤35, -10≤a2≤10, -10≤b2≤10.

[0057] Furthermore, the CIELab color coordinates of the electrochromic active component in the reflection state are: 2≤L2≤25, -5≤a2≤5, -5≤b2≤5.

[0058] In some possible embodiments, the first transparent conductive layer and / or the second transparent conductive layer is selected from at least one of an ITO conductive layer, a FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano-Ag wire conductive layer, conductive graphene and a nano-Cu wire conductive layer.

[0059] In some possible embodiments, the surface of the first transparent conductive layer and / or the second transparent conductive layer facing the light-controlling layer is covered with an adhesive layer; the adhesive layer material is at least one of epoxy resin, polyurethane, polyimide resin, polystyrene resin, acrylic resin, modified acrylic resin or silicone resin.

[0060] In some possible implementations, the first transparent substrate and the second transparent substrate are at least one of a glass plate and a transparent plastic sheet.

[0061] In principle, the present invention has no particular restrictions on the way the dimming film is energized. Those skilled in the art can select and adjust according to the actual application, quality requirements and product performance. In order to better ensure the ink color tone of the dimming film in the dark state, improve the light transmittance of the dimming film in the bright state, and better facilitate subsequent applications, the power-on method preferably includes alternating current.

[0062] The present invention adopts an external power supply as alternating current. In principle, there is no special restriction on the voltage of the alternating current. Those skilled in the art can select and adjust it according to the actual application, quality requirements and product performance. In order to better ensure the ink color tone of the dimming film in the dark state, improve the light transmittance of the dimming film in the bright state, and better facilitate subsequent applications, the effective value of the voltage of the alternating current is preferably 5-500V, more preferably 50-400V, and more preferably 100-200V.

[0063] In the present invention, the dimming film has an ink-based tone in the dark state and is transparent in the bright state in human vision. When U≠0, the value range of the color coefficient X is: -2.0≤X≤1.5, where X=(U*a*b) / (L*d), the unit is V / μm, and L>0.

[0064] In principle, the present invention has no particular restrictions on the total light transmittance of the dimming film in the bright state, and those skilled in the art can select and adjust according to actual application conditions, quality requirements and product performance. In order to better ensure the ink color tone of the dimming film in the dark state, improve the light transmittance of the dimming film in the bright state, and better facilitate subsequent applications, the total light transmittance of the dimming film in the bright state is preferably greater than or equal to 20%.

[0065] In principle, the present invention has no particular restrictions on the total light transmittance of the dimming film in the dark state, and those skilled in the art can select and adjust according to actual application conditions, quality requirements and product performance. In order to better ensure the ink color tone of the dimming film in the dark state, improve the light transmittance of the dimming film in the bright state, and better facilitate subsequent applications, the total light transmittance of the dimming film in the dark state is preferably less than or equal to 1%.

[0066] According to a second aspect of the present invention, a dimming glass is provided, comprising a first glass plate and a second glass plate, and any one of the above-mentioned dimming films arranged between the first glass plate and the second glass plate.

[0067] In the present invention, there is no special restriction on the types of the first glass plate and the second glass plate. They can be transparent glass for conventional dimming glass well known to those skilled in the art. They can be ordinary glass such as inorganic glass and organic glass, or functional glass such as UV blocking glass, IR blocking glass, Low-E glass, tempered glass or antibacterial glass, etc. They can also be selected from colored glass such as ink-colored glass.

[0068] In some possible implementations, a first interlayer is disposed between the first glass plate and the dimming film, and / or a second interlayer is disposed between the second glass plate and the dimming film.

[0069] In the present invention, there is no special restriction on the types of the first interlayer and the second interlayer, which are conventional interlayers for dimming glass well known to those skilled in the art, and may be EVA film, TPU film, PVB film, or functional film, such as UV-blocking EVA film, UV-blocking TPU film, UV-blocking PVB film, etc., or a film with a certain color, such as ink-colored EVA film, etc.

[0070] In the present invention, the method for manufacturing the dimming glass is not particularly limited, and can be a conventional laminating method of dimming glass in the art, such as laminating in a laminator, or laminating in an autoclave or a laminating box / furnace.

[0071] The third aspect of the present invention relates to the application of any one of the above-mentioned dimming films / dimming glasses in vehicle window glass, skylight glass and glass curtain wall.

[0072] In some possible implementations, any of the above-mentioned dimming films / dimming glasses can be used in scenarios requiring dimming in the fields of transportation, building decoration, display screens, smart windows, etc.

[0073] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 A schematic diagram of the structure of a dimming film provided by an embodiment of the present invention;

[0075] Figure 2 A schematic diagram of the structure of the dimming glass provided by an embodiment of the present invention;

[0076] Among them, 1. a first transparent substrate, 2. a first transparent conductive layer, 3. a light control layer, 4. a second transparent conductive layer, 5. a second transparent substrate, 6. a first glass plate, 7. a second glass plate, 8. a first interlayer, and 9. a second interlayer. DETAILED DESCRIPTION

[0077] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0078] the term

[0079] In the present invention, the following terms used have the meanings defined below.

[0080] The open state of the dimming film:

[0081] Refers to the state of the dimming film after the recommended power is applied from the off state and the visible light transmittance is stabilized, that is, U≠0.

[0082] The off state of the dimming film:

[0083] It refers to the state when no power is applied to the dimming film, or the recommended power is turned off from the on state, and the visible light transmittance is stabilized, that is, U=0.

[0084] Dark state of dimming film:

[0085] Refers to the state where the dimming film has the lowest visible light transmittance.

[0086] Bright state of dimming film:

[0087] Refers to the state where the dimming film has the highest visible light transmittance.

[0088] Intermediate state of dimming film:

[0089] Refers to the state where the visible light transmittance of the dimming film is between the dark state and the bright state.

[0090] Transparent conductive film:

[0091] A laminated composition of a transparent substrate and a transparent conductive layer.

[0092] In the present invention, the concepts of the first transparent conductive layer and the second transparent conductive layer only represent the relative relationship between the two, and are not restrictive conditions. They do not have to be in a first and second relationship, but may also be in an up and down relationship, or a front, back, left, right, etc. directional relationship.

[0093] In the present invention, the concepts of the first transparent substrate and the second transparent substrate only represent the relative relationship between the two, and are not restrictive conditions. They do not have to be in a first and second relationship, but may also be in an up and down relationship, or in a front, back, left, right, etc. directional relationship.

[0094] Use HunterLab's UltraScan VIS to measure the colorimetric data of the dimming film / smart glass.

[0095] The light transmittance of the dimming film / smart glass was measured using a LS116 light transmittance meter (Shenzhen Linshang Technology Co., Ltd.).

[0096] In order to further understand the present invention, the dimming film, dimming glass, dimming glass preparation method, dimming glass system and applications provided by the present invention are described in detail below in combination with embodiments. The protection scope of the present invention is not limited by the following embodiments.

[0097] Example 1

[0098] Preparation of yellow nitrocellulose:

[0099] 0.65g of reaction yellow 16 (CAS12225-83-1) was added to 35.3g of isopropanol and 5g of distilled water, stirred and dissolved at 40°C, then 10g of nitrocellulose was added, reacted for 1h, 0.51g of sodium bicarbonate was added to the reaction solution, and the temperature was raised to 50°C, and the reaction was continued for 1h, then filtered and washed with water until pH = 6.5. After drying at room temperature, the CIELab color coordinates of the yellow nitrocellulose in the reflection state were measured to be: L3 = 6.3, a3 = 5, b3 = 56.

[0100] Example 2

[0101] Preparation of orange nitrocellulose:

[0102] 0.9g reaction orange 107 (CAS 90597-79-8) was added to 45.3g isopropanol and 6g distilled water, stirred at 50°C to dissolve, then 10g nitrocellulose was added, reacted for 1h, then 0.6g sodium bicarbonate was added to the reaction solution, and the temperature was raised to 65°C, and the reaction was continued for 1h, then filtered and washed with water until pH = 6.5. After drying at room temperature, the CIELab color coordinates of the orange nitrocellulose in the reflection state were measured to be: L3 = 4.0, a3 = -10, b3 = 63.

[0103] Example 3

[0104] Preparation of yellow nitrocellulose:

[0105] 0.75g of reaction yellow 87 (CAS 61969-40-2) was added to 35.3g of isoamyl acetate and 8g of distilled water, stirred and dissolved at 60°C, then 10g of nitrocellulose was added, reacted for 1h, then 0.8g of sodium bicarbonate was added to the reaction solution, and the temperature was raised to 75°C, and the reaction was continued for 1h, then filtered and washed with water until pH = 6.5. After drying at room temperature, the CIELab color coordinates of the yellow nitrocellulose in the reflection state were measured to be: L3 = 3.3, a3 = 8, b3 = 80.

[0106] Example 4

[0107] Preparation of light-controlling particles:

[0108] 30 g of isoamyl acetate solution containing 21.2 wt% of the yellow nitrocellulose prepared in Example 1, 6 g of I2, 70 g of isoamyl acetate, 3 g of anhydrous CaI2, and 8 g of methanol were added to a 250 ml three-necked round-bottomed glass flask and heated to 42° C. After I2 was dissolved, 0.6 g of water and 4 g of 2,5-pyrazinedicarboxylic acid dihydrate were added to the three-necked round-bottomed glass flask. The mixture was heated and stirred at 42° C. for 4 hours and then cooled naturally.

[0109] The reaction solution was centrifuged at 1350G for 0.5 hours to remove large particle products. The supernatant was centrifuged at 18000G for 5 hours and the supernatant was discarded to obtain solid light-controlling particles. The solid light-controlling particles were fully dispersed with 250 ml of isoamyl acetate.

[0110] SEM characterization results show that the solid light-controlling particles have a particle length of 151 nm, a particle width of 50 nm, and a particle aspect ratio of 3.0.

[0111] The CIELab color coordinates of the solid light-controlling particles in the reflection state are tested to be: L2=5, a2=-2, b2=-3.

[0112] Prepare light control layer base emulsion:

[0113] Add 40 g of TDTM (tridecyl trimellitate) into a 250 ml round-bottom glass flask, and add the isoamyl acetate dispersion of the solid light-controlling particles prepared above in batches, remove the isoamyl acetate by a rotary evaporator, and finally continue to treat at 80°C using a rotary evaporator for 3 hours to obtain a suspension of solid light-controlling particles.

[0114] 0.1 g of photoinitiator 819, 13.0 g of a suspension of light-controlling particles, 26.9 g of a suspension medium, namely dioctyl terephthalate, and 70.0 g of a polymer matrix precursor (acrylate-modified polysiloxane) were uniformly mixed to obtain a light-controlling layer matrix emulsion.

[0115] Preparation of dimming film:

[0116] The suspended particle light-control layer matrix emulsion was coated on the ITO / PET transparent conductive film by a roll-to-roll automatic coating machine, and then another layer of ITO transparent conductive film was covered on the light-control layer matrix emulsion wet film to obtain a wet film containing the light-control layer. In a nitrogen atmosphere, it was cured in a UV curing box for 1 minute with a UV power of 700W / m 2 The light-controlling film 1 with a thickness of 70 μm is obtained, and the cross-sectional structure is as follows Figure 1 shown.

[0117] Conductive silver paste and conductive glue are applied to the first transparent conductive layer and the second transparent conductive layer at local positions near the edges of the two regions, and then two conductive leads (conductive copper tapes) are respectively adhered to the conductive silver paste and conductive glue, and dried. The two wires are respectively connected to the corresponding electrodes of the external power supply, and the voltage is controlled. The chromaticity data of the dimming film 1 obtained by testing is shown in Table 1.

[0118] Example 5

[0119] Same as Example 4, except that the orange nitrocellulose prepared in Example 2 was used instead of the yellow nitrocellulose prepared in Example 1. The SEM characterization results showed that the solid light-controlling particles had a particle length of 176 nm, a particle width of 73 nm, and a particle aspect ratio of 2.4. The CIELab color coordinates of the solid light-controlling particles in the reflection state were tested to be: L2=8, a2=-4, b2=1.

[0120] In this embodiment, a dimming film 2 having a light control layer thickness of 45 μm is prepared. The chromaticity data of the dimming film 2 is shown in Table 1.

[0121] Example 6

[0122] Same as Example 4, except that the yellow nitrocellulose prepared in Example 3 is used instead of the yellow nitrocellulose prepared in Example 1. The SEM characterization results show that the solid light-controlling particles have a particle length of 360 nm, a particle width of 81 nm, and a particle aspect ratio of 4.4. The CIELab color coordinates of the solid light-controlling particles in the reflection state are: L2=26, a2=2, b2=-5.

[0123] In this embodiment, a dimming film 3 with a light control layer thickness of 30 μm is prepared. The chromaticity data of the dimming film 3 is shown in Table 1.

[0124] Example 7

[0125] Same as Example 4, except that 40 g of isoamyl acetate solution containing 21.2 wt% of the yellow nitrocellulose prepared in Example 1 was added, and the mixture was heated and stirred at 43°C for 2 hours. The SEM characterization results showed that the solid light-controlling particles had a particle length of 298 nm, a particle width of 192 nm, and a particle aspect ratio of 1.6. The CIELab color coordinates of the solid light-controlling particles were: L2=4, a2=-0.5, b2=-3.

[0126] In this embodiment, a dimming film 4 having a light control layer thickness of 70 μm is prepared. The chromaticity data of the dimming film 4 is shown in Table 1.

[0127] Example 8

[0128] Same as Example 5, except that 40 g of isoamyl acetate solution containing 21.2 wt% of the orange nitrocellulose prepared in Example 2 was added, and the mixture was heated and stirred at 50°C for 3 hours. The SEM characterization results showed that the solid light-controlling particles had a particle length of 292 nm, a particle width of 97 nm, and a particle aspect ratio of 3.0. The CIELab color coordinates of the solid light-controlling particles were: L2=8, a2=-5, b2=6.

[0129] In this embodiment, a dimming film 5 having a light control layer thickness of 45 μm is prepared. The chromaticity data of the dimming film 5 is shown in Table 1.

[0130] Example 9

[0131] Same as Example 6, except that 40 g of isoamyl acetate solution containing 21.2 wt% of the yellow nitrocellulose prepared in Example 3 and 8 g of I2 were added. SEM characterization results showed that the solid light-controlling particles had a particle length of 189 nm, a particle width of 158 nm, and a particle aspect ratio of 1.2. The CIELab color coordinates of the solid light-controlling particles were tested to be: L2=5, a2=-8, b2=-2.

[0132] In this embodiment, a dimming film 6 having a light control layer thickness of 30 μm is prepared. The chromaticity data of the dimming film 6 is shown in Table 1.

[0133] Table 1 Chromaticity data of dimming films prepared in Examples 4 to 9

[0134]

[0135] Example 10

[0136] Ordinary tempered glass is used as the first and second glass plates, EVA film is set as the first interlayer film and the second interlayer film, and the dimming film prepared in Example 4 is used, and they are stacked in sequence. The interlayer treatment is carried out in an autoclave, the interlayer temperature is 110°C, the interlayer pressure is 0.5MPa, and the interlayer time is 30min, so that the dimming glass 1 is obtained, and the cross-sectional structure is as follows Figure 2 shown.

[0137] Embodiment 11

[0138] The ink-colored glass was used as the first and second glass plates, TPU films were used as the first and second interlayer films, and the dimming film prepared in Example 4 was used, and they were stacked in sequence. The interlayer treatment was carried out in an autoclave, the interlayer temperature was 110°C, the interlayer pressure was 0.5 MPa, and the interlayer time was 30 min, and the dimming glass 2 was obtained. The cross-sectional structure is shown in FIG. Figure 2 shown.

[0139] When the dimming glass component uses its own ink-colored glass as the glass plate, its own ink color can neutralize and adjust the color produced by the dimming film. The color of the dimming film can also be adjusted to adapt to the color of the glass plate by adjusting the voltage of the dimming film. According to customer preferences and application scenarios, a personalized comprehensive display effect can be achieved.

[0140] The dimming film and dimming glass prepared in the above embodiments can show soft ink color in the dark state when the voltage is 0, have higher artistic beauty and customer acceptance, and can significantly expand the application scenarios and market space of the dimming film and dimming glass products.

[0141] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0142] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ink-colored glazing film, characterized in that: It comprises a first transparent substrate, a first transparent conductive layer, a light control layer, a second transparent conductive layer, and a second transparent substrate which are stacked in sequence; the thickness of the light control layer is d, in μm; The effective value of the voltage applied to the dimming film is U, in V; When U=0, the CIELab color coordinates of the dimming film in the transmission state are: 5≤L1≤45, -15≤a1≤10, -15≤b1≤10; When U≠0, the value range of the color coefficient X is: -2.0≤X≤1.5, where X=(U*a*b) / (L*d), the unit is V / μm, and L>0.

2. The ink-colored glazing film according to claim 1, characterized in that: The CIELab color coordinates of the dimming film in the transmission state are: 5≤L1≤40, -10≤a1≤5, -10≤b1≤5.

3. The ink-colored glazing film according to claim 1, characterized in that: The CIELab color coordinates of the dimming film in the transmission state are: 5≤L1≤35, -5≤a1≤5, -8≤b1≤5.

4. The ink-colored glazing film according to claim 1, characterized in that: The numerical range of the color coefficient X is: -1.5≤X≤1.

0.

5. The ink-colored glazing film according to claim 1, characterized in that: The numerical range of the color coefficient X is: -0.8≤X≤0.

4.

6. The ink-colored glazing film according to claim 1, characterized in that: The light control layer is at least one of a suspended particle light control layer, a polymer dispersed liquid crystal light control layer or an electrochemical reaction light control layer.

7. The ink-colored glazing film according to claim 1, characterized in that: The light-controlling layer is a suspended particle light-controlling layer.

8. The ink-colored glazing film according to claim 7, characterized in that: The light-controlling layer includes light-controlling particles, and the CIELab color coordinates of the light-controlling particles in a reflection state are: 1≤L2≤35, -10≤a2≤10, -10≤b2≤10.

9. The ink-colored glazing film according to claim 8, characterized in that: The CIELab color coordinates of the light-controlling particles in the reflection state are: 2≤L2≤25, -5≤a2≤5, -5≤b2≤5.

10. The ink-colored glazing film according to any one of claims 8 and 9, characterized in that: The light-controlling particles are formed from raw materials including the following components: iodine, main group metal iodide, nitrogen-containing organic ligand and yellow and / or orange nitrocellulose.

11. The ink-colored glazing film according to claim 1, characterized in that: The first transparent conductive layer and / or the second transparent conductive layer is selected from at least one of an ITO conductive layer, a FZO conductive layer, an IZO conductive layer, a GZO conductive layer, an AZO conductive layer, a PEDOT conductive layer, a nano-Ag wire conductive layer, conductive graphene and a nano-Cu wire conductive layer.

12. The ink-colored glazing film according to claim 1, characterized in that: The surface of the first transparent conductive layer and / or the second transparent conductive layer facing the light control layer is covered with an adhesive layer; the adhesive layer is made of at least one of epoxy resin, polyurethane, polyimide resin, polystyrene resin, acrylic resin, modified acrylic resin or silicone resin.

13. The ink-colored glazing film according to claim 1, characterized in that: The first transparent substrate and the second transparent substrate are at least one of a glass plate or a transparent plastic sheet.

14. An ink-colored glazing glass, characterized in that: The invention comprises a first glass plate and a second glass plate, and the dimming film according to any one of claims 1 to 13 arranged between the first glass plate and the second glass plate.

15. The ink-colored glazing glass according to claim 14, characterized in that: A first interlayer is disposed between the first glass plate and the dimming film, and / or a second interlayer is disposed between the second glass plate and the dimming film.

16. Use of the ink-colored glazing film according to any one of claims 1 to 13 or the ink-colored glazing glass according to any one of claims 14 to 15 in vehicle window glass, skylight glass and glass curtain wall.

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