Water vapor blocking electrochromic dimming film and packaging method thereof

Abstract

The invention relates to the technical field of electrochromic materials, and particularly discloses a water vapor blocking electrochromic dimming film and a packaging method thereof. According to the SPD light adjusting film, self-adhesion installation of the light adjusting film is achieved through the arrangement of the press-fit adhesive layer, under the synergistic effect of the water blocking film and the composite water blocking film, the SPD light adjusting film is slightly affected by water vapor, ideal transmittance and haze can be kept for a long time in a high-humidity environment, and therefore the SPD light adjusting film has the long service life and is suitable for popularization and application. Frequent replacement is not needed, and the maintenance cost of a building can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electrochromic materials, and more specifically, to a water vapor barrier electrochromic light-emitting film and a packaging method thereof. Background Art

[0002] With the continuous development of the economy, people's requirements for living comfort are getting higher and higher. Intelligent dynamic dimming film has the advantages of adjustable light transmittance, blocking ultraviolet rays, infrared rays, sunshade and heat insulation. Based on the above reasons, intelligent dynamic dimming glass with intelligent dynamic dimming film as the core structure is particularly suitable as curtain wall glass for high-rise buildings and has a very broad development prospect.

[0003] In the related art, there is a kind of intelligent dynamic dimming glass, which includes two layers of fireproof glass, a layer of intelligent dimming film is arranged between the two layers of fireproof glass, and a layer of PVB film film or EVA film film for gluing between the fireproof glass layer and the intelligent dimming film; the PVB film film or EVA film film is glued between the fireproof glass layer and the intelligent dimming film by high temperature and high pressure. However, if this kind of intelligent dynamic dimming glass is to be put into use in the high-rise buildings that have been built, the original curtain wall glass needs to be replaced, which is not only difficult to construct, but also will bring huge waste of manpower costs and resources. At present, the self-adhesive intelligent dynamic dimming film can be directly attached to the existing curtain wall glass, so that the building curtain wall glass can still achieve functions such as adjustable light transmittance, blocking ultraviolet and infrared, sunshade and heat insulation without the need for replacement.

[0004] Regarding the above-mentioned related technologies, the inventors believe that although the self-adhesive dimming film is easy to install, due to the lack of protection of the glass layer, the performance of the dimming film is greatly affected by water vapor. It is difficult to maintain ideal transmittance and haze during actual use. The service life is short and requires frequent replacement, which increases the maintenance cost of the building. Summary of the invention

[0005] In the related art, the self-adhesive dimming film is greatly affected by water vapor, and it is difficult to maintain the ideal transmittance and haze during actual use. The service life is short and needs to be replaced frequently, which increases the maintenance cost of the building. In order to improve this defect, the present application provides a water vapor barrier electrochromic dimming film and a packaging method thereof.

[0006] In the first aspect, the present application provides a water vapor barrier electrochromic dimming film, which adopts the following technical scheme: a water vapor barrier electrochromic dimming film, comprising a dimming film body and a pressed adhesive layer, wherein the pressed adhesive layer is arranged on one side of the dimming film body, wherein the dimming film body comprises an SPD color-changing film sheet, and a water-blocking film is adhered to both sides of the SPD color-changing film sheet; a composite water-blocking film is adhered to the surface of the water-blocking film, wherein the composite water-blocking film comprises a water-blocking film substrate, wherein the water-blocking film substrate contains polyethylene terephthalate; a side of the water-blocking film substrate close to the water-blocking film is provided with a magnetron sputtering waterproof layer, wherein the magnetron sputtering waterproof layer is attached and bonded to the water-blocking film, and the pressed adhesive layer is bonded to the side of the water-blocking film substrate away from the water-blocking film.

[0007] By adopting the above technical solution, the present application sets a pressed adhesive layer on one side of the dimming film body. The pressed adhesive layer enables the dimming film to be directly fixed on the glass surface, realizing the self-adhesive installation of the dimming film without removing the original glass. In the dimming film body, the water-blocking film and the composite water-blocking film jointly protect the SPD color-changing film. The water-blocking film substrate of the composite water-blocking film contains polyethylene terephthalate, which itself has a certain barrier effect on water vapor, and the magnetron sputtering waterproof layer can be evenly and densely covered on the surface of the water-blocking film substrate, thereby filling the defects on the surface of the water-blocking film substrate and blocking the penetration path of water vapor. Under the synergistic effect of the water-blocking film substrate and the magnetron sputtering waterproof layer, the composite water-blocking film can effectively reduce the water vapor that penetrates into the interior of the dimming film, making it difficult for water vapor to affect the SPD color-changing film. On the basis of the composite water-blocking film, the water-blocking film can further physically block the water vapor, so that the small amount of water vapor remaining after being intercepted by the composite water-blocking film is difficult to directly contact the SPD color-changing film. Under the synergistic effect of the water-blocking film and the composite water-blocking film, the SPD dimming film of the present application is less affected by water vapor, and can maintain the ideal transmittance and haze for a long time in a high humidity environment, so it has a long service life, does not need to be replaced frequently, and can effectively reduce the maintenance cost of the building.

[0008] Preferably, the SPD color-changing film comprises a color-changing material layer, and electrode layers are attached to both the front and back sides of the color-changing material layer. The electrode layer uses polyethylene terephthalate as a substrate and is plated with a layer of ITO on a side close to the color-changing material layer.

[0009] By adopting the above-mentioned technical scheme, the present application defines the structure of the SPD color-changing membrane. Under the synergistic effect of the water-blocking film and the composite water-blocking film, the SPD color-changing membrane assembled in the above manner is not easily affected by water vapor, can maintain ideal electrochromic performance for a long time in a water vapor environment, and has a long service life.

[0010] Preferably, the component of the magnetron sputtering waterproof layer includes aluminum oxide.

[0011] By adopting the above technical solution, the present application preferably uses aluminum oxide as a component of the magnetron sputtering waterproof layer. The magnetron sputtering waterproof layer formed by aluminum oxide has excellent barrier properties and transparency, and has good compactness. Through the synergistic effect with structures such as water-blocking film and water-blocking film substrate, the magnetron sputtering waterproof layer composed of aluminum oxide can effectively prevent the intrusion of water vapor, so that the dimming film can maintain ideal electrochromic performance for a long time in a water vapor environment.

[0012] Preferably, the magnetron sputtering waterproof layer also includes zinc oxide as a component.

[0013] By adopting the above technical solution, the magnetron sputtering waterproof layer composed of zinc oxide and aluminum oxide can more effectively fill the defects on the surface of the water-blocking film substrate and block the penetration path of water vapor, which helps to improve the dimming film's resistance to water vapor.

[0014] Preferably, the thickness of the magnetron sputtering waterproof layer is 150-250 nm.

[0015] By adopting the above technical solution, the present application optimizes the thickness range of the magnetron sputtering waterproof layer, which helps to fully block the penetration of water vapor, so that the dimming film can maintain ideal transmittance and haze for a long time in a high humidity environment.

[0016] Preferably, the water-blocking film substrate contains modified montmorillonite, and the modified montmorillonite is montmorillonite with protonated p-aminobenzoic acid ions intercalated between the layers.

[0017] By adopting the above-mentioned technical scheme, the present application adds modified montmorillonite to the water-blocking film substrate. The protonated para-aminobenzoic acid ions can improve the compatibility of the modified montmorillonite with polyethylene terephthalate and promote the uniform dispersion of the modified montmorillonite. The addition of modified montmorillonite can promote the crystallization of polyethylene terephthalate, thereby reducing the infiltration of water vapor and improving the resistance of the dimming film to water vapor.

[0018] Preferably, the modified montmorillonite is prepared according to the following method: (1) adding water and montmorillonite into a reaction kettle, stirring and heating, and then keeping the temperature for later use; (2) adding p-aminobenzoic acid hydrochloride into a reaction kettle, cooling after heat preservation reaction, discharging the material, washing it with water and then with anhydrous ethanol, and filtering it to obtain a filter residue; (3) The filter residue is vacuum dried to a constant weight, and then ground to obtain modified montmorillonite.

[0019] By adopting the above technical scheme, the present application first disperses montmorillonite in water, then adds p-aminobenzoic acid hydrochloride to the montmorillonite dispersion, and after the ion exchange reaction, the protonated p-aminobenzoic acid ions enter between the montmorillonite layers, and the metal cations in the montmorillonite are exchanged into the water, thereby obtaining modified montmorillonite.

[0020] Preferably, the water-blocking film substrate further contains fumaric acid-modified polyester, and the fumaric acid-modified polyester is prepared according to the following method: (1) fumaric acid, terephthalic acid and ethylene glycol are mixed in an esterification kettle, preheated under nitrogen protection, and then a catalyst and a stabilizer are added to carry out a catalytic reaction to obtain an oligomer; (2) introducing the oligomer into a polycondensation kettle, performing vacuum evacuation and temperature-raising polycondensation, and pelletizing after the polycondensation is completed to obtain fumaric acid-modified polyester.

[0021] By adopting the above technical solution, the present application uses fumaric acid, ethylene glycol and terephthalic acid to participate in the esterification reaction, and obtains fumaric acid modified polyester. In the fumaric acid modified polyester, the fumaric acid group limits the rotation of the molecular chain, enhances the hydrophobicity of the molecule, and can also reduce the defects in the crystal region. Therefore, the fumaric acid modified polyester has a good barrier effect on water vapor. The addition of fumaric acid modified polyester can further reduce the intrusion of water vapor, so that the dimming film can maintain the ideal electrochromic performance for a long time in a water vapor environment.

[0022] Preferably, the water-blocking film substrate is prepared according to the following method: (1) polyethylene terephthalate, fumaric acid modified polyester, and modified montmorillonite are mixed as a base material, and the base material, chain extender, antioxidant, and adhesive are stirred and mixed, and then transferred to a twin-screw extruder for melt blending and extrusion granulation to obtain a masterbatch; (2) The masterbatch, compatibilizer and toughening agent are mixed and added into a single screw extruder for blow molding, and then stretched and rolled to obtain a water-blocking film substrate.

[0023] By adopting the above technical solution, the present application uses polyethylene terephthalate, fumaric acid-modified polyester and modified montmorillonite as raw materials, and prepares a water-blocking film substrate through melt blending and blow molding.

[0024] In a second aspect, the present application provides a packaging method for a water vapor barrier electrochromic light-changing film, which adopts the following technical solution.

[0025] A method for packaging a water vapor barrier electrochromic light-changing film, comprising the following steps: (1) sandwiching the SPD color-changing film between two water-blocking films, and then laminating the water-blocking films on both sides with the composite water-blocking film, and obtaining the dimming film body after heating and packaging; (2) Use edge sealing glue to perform edge sealing and back adhesive processing on the dimming film body, form a pressing adhesive layer on one side of the dimming film body, and make the pressing adhesive layer adhere to the glass surface, so as to complete the packaging of the water vapor barrier electrochromic dimming film.

[0026] By adopting the above technical solution, the present application first assembles the dimming film body, then performs edge sealing and back adhesive processing, and then bonds the pressed adhesive layer to the glass to complete the packaging, thereby transforming ordinary glass into smart dynamic dimming glass with electrochromic effect.

[0027] In summary, this application has the following beneficial effects: 1. The present application realizes the self-adhesive installation of the dimming film by setting a pressed adhesive layer, and under the synergistic effect of the water-blocking film and the composite water-blocking film, the SPD dimming film of the present application is less affected by water vapor and can maintain the ideal transmittance and haze for a long time in a high humidity environment. Therefore, it has a long service life and does not require frequent replacement, which can effectively reduce the maintenance cost of the building.

[0028] 2. In the present application, aluminum oxide and zinc oxide are preferably used as the components of the magnetron sputtering waterproof layer, which can effectively prevent the intrusion of water vapor, so that the dimming film can maintain the ideal electrochromic performance for a long time in a water vapor environment.

[0029] 3. The present application adds modified montmorillonite and fumaric acid modified polyester to the water-blocking film substrate, thereby improving the water-blocking performance of the water-blocking film substrate, further reducing the intrusion of water vapor, and enabling the dimming film to maintain ideal electrochromic performance for a long time in a water vapor environment. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with embodiments, preparation examples and comparative examples. The raw materials involved in the present application can all be obtained commercially.

[0031] Preparation example of water-blocking film substrate The following is an explanation using Preparation Example 1.

[0032] Preparation Example 1 In this preparation example, the intrinsic viscosity of polyethylene terephthalate is 0.865 dL / g, and the additives include a chain extender, an antioxidant, a toughening agent, a compatibilizer, and an adhesive; the chain extender is an epoxy chain extender ADR-4368 (BASF), the epoxy equivalent of the chain extender is 285 g / mol, and the amount used is 0.5% of the total weight of the base material; the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a weight ratio of 2:1, and the amount of the antioxidant is 1% of the total weight of the base material; the toughening agent is POE resin (Engage 8999, DuPont Company, USA), the amount of toughener is 3.5% of the total weight of the base material; the compatibilizer is maleic anhydride grafted POE, the maleic anhydride grafting rate of the compatibilizer is 0.8%, and the amount of the compatibilizer is 0.5% of the total weight of the base material; the adhesive is liquid paraffin, and the amount of the adhesive is 0.5% of the total weight of the base material.

[0033] In this preparation example, the water-blocking film substrate is prepared according to the following method: (1) Using polyethylene terephthalate as a base material, stirring and mixing the base material, a chain extender, an antioxidant and a binder, and then transferring the mixture to a twin-screw extruder for melt blending and extrusion granulation to obtain a masterbatch; (2) The masterbatch, compatibilizer and toughening agent are mixed and added into a single screw extruder for blow molding, and then stretched and rolled to obtain a water-blocking film substrate with a thickness of 125 μm.

[0034] Preparation Example 2 The difference between this preparation example and preparation example 1 is that the base material further includes modified montmorillonite, the weight of which is equivalent to 5% of the total weight of the base material, and the modified montmorillonite is prepared according to the following method: (1) Add 2.5 kg of water and 500 g of sodium montmorillonite into a reaction kettle, continue stirring and heat to 70° C. and keep warm for later use; (2) adding 800 g of p-aminobenzoic acid hydrochloride into a reaction kettle, keeping the temperature for reaction for 16 hours, cooling, discharging, washing with water and anhydrous ethanol, and filtering to obtain a filter residue; (3) The filter residue was vacuum dried at 40°C to a constant weight, and then ground to obtain a modified montmorillonite with an average particle size of 15 μm.

[0035] Preparation Example 3 The difference between this preparation example and preparation example 2 is that the base material further includes fumaric acid modified polyester, the weight of the fumaric acid modified polyester is equivalent to 15% of the total weight of the base material, and the fumaric acid modified polyester is prepared according to the following method: (1) in an esterification kettle, fumaric acid, terephthalic acid and ethylene glycol are mixed in a weight ratio of 0.05:1:1.05, preheated to 265° C. under nitrogen protection, and then a catalyst (ethylene glycol antimony, the amount of which is 1% of the total weight of the monomer) and a stabilizer (triphenyl phosphate, the amount of which is 1% of the total weight of the monomer) are added to carry out a catalytic reaction to obtain an oligomer; (2) introducing the oligomer into a polycondensation reactor, evacuating the vacuum and heating the polycondensation reactor, reacting at 280° C. until the polycondensation is completed, and then pelletizing to obtain a fumaric acid-modified polyester. Example

[0036] Examples 1-5 The following description is given by taking Example 1 as an example.

[0037] Example 1 The present embodiment provides a water vapor barrier electrochromic dimming film, comprising a dimming film body and a pressed adhesive layer, wherein the pressed adhesive layer is arranged on one side of the dimming film body, the dimming film body comprises an SPD color-changing film sheet, and a water-blocking film is adhered to both sides of the SPD color-changing film sheet; a composite water-blocking film is adhered to the surface of the water-blocking film, and the composite water-blocking film comprises a water-blocking film substrate, and the water-blocking film substrate contains polyethylene terephthalate; a side of the water-blocking film substrate close to the water-blocking film is provided with a magnetron sputtering waterproof layer, the magnetron sputtering waterproof layer is attached and bonded to the water-blocking film, and a side of the water-blocking film substrate facing away from the water-blocking film is bonded to the pressed adhesive layer.

[0038] The water-blocking film substrate in the composite water-blocking film was prepared according to the method of Preparation Example 1; the material of the magnetron sputtering waterproof layer was alumina, and it was formed at a sputtering power of 450 W, and the working pressure during the forming was 5.0×10 3 Pa, with a thickness of 100nm; the material of the water-blocking film is EVA, with a thickness of 400μm; the total thickness of the SPD color-changing film is 200μm, including a color-changing material layer with a thickness of 100μm, and an electrode layer with a thickness of 50μm is attached to the front and back of the color-changing material layer. The electrode layer is based on polyethylene terephthalate and is plated with a layer of ITO on the side close to the color-changing material layer; the pressed adhesive layer is cured by edge-sealing glue, and the edge-sealing glue is a single-component epoxy resin glue.

[0039] This embodiment provides a packaging method for a water vapor barrier electrochromic light-changing film, comprising the following steps: (1) sandwiching the SPD color-changing film between two water-blocking films, and then laminating the water-blocking films on both sides with the composite water-blocking film, heating at 50° C. for 90 min and at 100° C. for 120 min, completing the heating packaging, and obtaining the dimming film body; (2) Use edge sealing glue to perform edge sealing and back adhesive processing on the dimming film body, form a pressing adhesive layer on one side of the dimming film body, and make the pressing adhesive layer adhere to the glass surface, so as to complete the packaging of the water vapor barrier electrochromic dimming film.

[0040] Example 2 The difference between this embodiment and embodiment 1 is that the magnetron sputtering waterproof layer is composed of aluminum oxide and zinc oxide in a weight ratio of 3:1.

[0041] Embodiment 3-7 As shown in Table 1, the difference between Examples 3-7 and Example 2 is that the thickness of the magnetron sputtering waterproof layer is different.

[0042] Table 1 Thickness of magnetron sputtering waterproof layer Example 8 The difference between this embodiment and embodiment 7 is that the water-blocking film substrate is prepared according to the method of preparation example 2.

[0043] Example 9 The difference between this embodiment and embodiment 7 is that the water-blocking film substrate is prepared according to the method of preparation example 3.

[0044] Comparative Example Comparative Example 1 The difference between this comparative example and Example 1 is that the composite water-blocking film and the water-blocking film are not provided on the side of the dimming film body away from the laminating adhesive layer.

[0045] Comparative Example 2 The difference between this comparative example and Example 1 is that no composite water-blocking film is provided on the side of the dimming film body away from the laminating adhesive layer.

[0046] Comparative Example 3 The difference between this comparative example and Example 1 is that, on the side of the dimming film body away from the pressed adhesive layer, the surface of the water-blocking film substrate is not provided with a magnetron sputtering waterproof layer, and the water-blocking film substrate is directly bonded to the water-blocking film.

[0047] Performance testing methods The encapsulated dimming films of each embodiment and comparative example were placed in a constant temperature and humidity test chamber for wet heat treatment, and the test conditions were 85°C, 85% humidity, and 1000 hours. After the wet heat treatment, the visible light transmittance of the dimming film after wet heat treatment was detected with reference to the record of GB / T 2680-2021 (the maximum value in a complete light-dark cycle was selected), and the haze of the dimming film after wet heat treatment was detected with reference to the record of GB / T 2410-2008 (the minimum value in a complete light-dark cycle was selected), and then the visible light transmittance and haze of comparative example 1 were used as the benchmark to calculate the ratio between the visible light transmittance and haze of each embodiment and comparative example and the result of comparative example 1, and the results were recorded as relative transmittance and relative haze. The results are shown in Table 2.

[0048] Table 2 Test results Combining Example 1 and Comparative Example 1 and Table 2, it can be seen that the relative transmittance measured in Example 1 is higher than that in Comparative Example 1, while the relative haze is lower than that in Comparative Example 1. This is because under the synergistic effect of the water-blocking film and the composite water-blocking film, the SPD dimming film of the present application is less affected by water vapor and can maintain the ideal transmittance and haze for a long time in a high humidity environment, so it has a long service life and does not need to be replaced frequently, which can effectively reduce the maintenance cost of the building. Comparative Example 1 lacks water-blocking film and composite water-blocking film, which makes the SPD color-changing film directly contact with water vapor, and thus loses more performance under the action of water vapor.

[0049] Combining Example 1 and Comparative Examples 2-3 and Table 2, it can be seen that the relative transmittance measured in Example 1 is higher than that in Comparative Examples 2-3, while the relative haze is lower than that in Comparative Examples 2-3. This is because Comparative Example 2 lacks a composite water-blocking film, and the composite water-blocking film of Comparative Example 3 lacks a magnetron sputtering waterproof layer, resulting in the composite water-blocking film and the water-blocking film being unable to fully exert their synergistic effect, and the SPD color-changing film loses a lot of performance under the action of water vapor.

[0050] Combining Example 1 and Example 2 and Table 2, it can be seen that the relative transmittance measured in Example 2 is higher than that in Example 1, while the relative haze is lower than that in Example 1, indicating that the magnetron sputtering waterproof layer composed of zinc oxide and aluminum oxide can more effectively fill the defects on the surface of the water-blocking film substrate and block the water vapor penetration path, which helps to improve the resistance of the dimming film to water vapor.

[0051] It can be seen from Example 2, Examples 3-7 and Table 2 that the relative transmittance measured in Examples 3-7 is relatively high and the relative haze is relatively low, indicating that when the thickness of the magnetron sputtering waterproof layer is 150-250nm, the magnetron sputtering waterproof layer can fully block the intrusion of water vapor, and through the synergistic effect of the composite water-blocking film and the water-blocking film, the dimming film can maintain ideal electrochromic performance for a long time in a water vapor environment.

[0052] Combining Example 7 and Example 8 with Table 2, it can be seen that the relative transmittance measured in Example 8 is relatively high and the relative haze is relatively low. This is because the protonated p-aminobenzoic acid ion can improve the compatibility of the modified montmorillonite with polyethylene terephthalate and promote the uniform dispersion of the modified montmorillonite. The addition of modified montmorillonite can promote the crystallization of polyethylene terephthalate, thereby reducing the infiltration of water vapor and improving the resistance of the dimming film to water vapor.

[0053] Combining Example 8 and Example 9 with Table 2, it can be seen that the relative transmittance measured in Example 9 is relatively high and the relative haze is relatively low. This is because in the fumaric acid-modified polyester, the fumaric acid group limits the rotation of the molecular chain, enhances the hydrophobicity of the molecule, and can also reduce the defects in the crystal region. Therefore, the fumaric acid-modified polyester has a good barrier effect on water vapor. The addition of fumaric acid-modified polyester can further reduce the intrusion of water vapor, so that the dimming film can maintain ideal electrochromic performance for a long time in a water vapor environment.

[0054] The above embodiments are merely explanations of the present application and are not limitations of the present application. After reading this specification, those skilled in the art may make modifications to the embodiments of the present application without any creative contribution as needed. However, as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A water vapor barrier electrochromic light-emitting film, characterized in that: It includes a dimming film body and a pressed adhesive layer, wherein the pressed adhesive layer is arranged on one side of the dimming film body, the dimming film body includes an SPD color-changing film, and a water-blocking film is adhered to both the front and back sides of the SPD color-changing film; a composite water-blocking film is adhered to the surface of the water-blocking film, and the composite water-blocking film includes a water-blocking film substrate, and the water-blocking film substrate contains polyethylene terephthalate; the side of the water-blocking film substrate close to the water-blocking film is provided with a magnetron sputtering waterproof layer, the magnetron sputtering waterproof layer is attached and bonded to the water-blocking film, and the pressed adhesive layer is bonded to the side of the water-blocking film substrate away from the water-blocking film.

2. The water vapor barrier electrochromic light-emitting film according to claim 1, characterized in that: The SPD color-changing film comprises a color-changing material layer, and electrode layers are attached to both the front and back sides of the color-changing material layer. The electrode layer uses polyethylene terephthalate as a substrate and is plated with a layer of ITO on a side close to the color-changing material layer.

3. The water vapor barrier electrochromic light-emitting film according to claim 1, characterized in that: The components of the magnetron sputtering waterproof layer include aluminum oxide.

4. The water vapor barrier electrochromic light-emitting film according to claim 3, characterized in that: The components of the magnetron sputtering waterproof layer also include zinc oxide.

5. The water vapor barrier electrochromic light-emitting film according to claim 4, characterized in that: The thickness of the magnetron sputtering waterproof layer is 150-250nm.

6. The water vapor barrier electrochromic light-emitting film according to claim 1, characterized in that: The water-blocking film substrate contains modified montmorillonite, which is montmorillonite with protonated p-aminobenzoic acid ions intercalated between the sheets.

7. The water vapor barrier electrochromic light-emitting film according to claim 6, characterized in that: The modified montmorillonite is prepared according to the following method: (1) Add water and montmorillonite into a reactor, stir and heat, and then keep warm for later use; (2) adding p-aminobenzoic acid hydrochloride into a reaction kettle, cooling after heat preservation reaction, discharging the material, washing it with water and anhydrous ethanol in turn, and filtering it to obtain a filter residue; (3) The filter residue is vacuum dried to a constant weight and then ground to obtain modified montmorillonite.

8. The water vapor barrier electrochromic light-emitting film according to claim 6, characterized in that: The water-blocking film substrate further contains fumaric acid-modified polyester, and the fumaric acid-modified polyester is prepared according to the following method: (1) Mix fumaric acid, terephthalic acid and ethylene glycol in an esterification kettle, preheat them under nitrogen protection, and then add a catalyst and a stabilizer to carry out a catalytic reaction to obtain an oligomer; (2) The oligomer is introduced into a polycondensation reactor, and vacuumized and heated for polycondensation. After the polycondensation is completed, pelletization is performed to obtain fumaric acid-modified polyester.

9. The water vapor barrier electrochromic light-emitting film according to claim 8, characterized in that: The water-blocking film substrate is prepared according to the following method: (1) Polyethylene terephthalate, fumaric acid modified polyester and modified montmorillonite are mixed as a base material, the base material, chain extender, antioxidant and adhesive are stirred and mixed, and then transferred to a twin-screw extruder for melt blending and extrusion granulation to obtain a masterbatch; (2) The masterbatch, compatibilizer and toughening agent are mixed and added into a single screw extruder for blow molding, and then stretched and rolled to obtain a water-blocking film substrate.

10. The packaging method of the water vapor barrier electrochromic light-emitting film according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) The SPD color-changing film is sandwiched between two water-blocking films, and then the water-blocking films on both sides are laminated with the composite water-blocking film, and the dimming film body is obtained after heating and packaging; (2) Use edge sealing glue to perform edge sealing and back adhesive processing on the dimming film body, form a pressing adhesive layer on one side of the dimming film body, and make the pressing adhesive layer adhere to the glass surface, so as to complete the packaging of the water vapor barrier electrochromic dimming film.

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