CN113427874B - Self-cleaning intelligent dynamic dimming glass - Google Patents

Self-cleaning intelligent dynamic dimming glass Download PDF

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Publication number
CN113427874B
CN113427874B CN202110714667.8A CN202110714667A CN113427874B CN 113427874 B CN113427874 B CN 113427874B CN 202110714667 A CN202110714667 A CN 202110714667A CN 113427874 B CN113427874 B CN 113427874B
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polyurethane
transparent substrate
substrate layer
surface protection
coating
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CN113427874A (en
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王鹏飞
胡志诚
陈佳峰
陈超群
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Shaoxing Difei New Material Co ltd
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Shaoxing Difei New Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
    • C09D133/16—Homopolymers or copolymers of esters containing halogen atoms
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/24—Organic non-macromolecular coating

Abstract

The invention discloses self-cleaning intelligent dynamic dimming glass which comprises a first transparent substrate layer, a second transparent substrate layer, a suspended particle device layer arranged between the first transparent substrate layer and the second transparent substrate layer, a first transparent conductor layer arranged between the first transparent substrate layer and the suspended particle device layer, and a second transparent conductor layer arranged between the second transparent substrate layer and the suspended particle device layer, wherein the surfaces of the first transparent substrate layer and the second transparent substrate layer are coated with a surface protection coating, and the surface protection coating is prepared from the following raw materials in parts by weight: 3-6 parts of 2- (perfluorooctyl) ethyl methacrylate, 14-18 parts of N, N-dimethylformamide, 0.02-0.06 part of 2, 2' -azobisisobutyronitrile and 160 parts of diethyl ether 120-. The application has the effect of improving the surface self-cleaning capability and the protective capability of the dimming glass.

Description

Self-cleaning intelligent dynamic dimming glass
Technical Field
The invention relates to the field of glass, in particular to self-cleaning intelligent dynamic dimming glass.
Background
In recent years, there has been an increasing interest in switchable glasses. Switchable glasses change their own light transmittance characteristics when a voltage is applied. When a voltage is applied to the glass panel, the glass changes from a dark state to a transparent or translucent state. Such switchable glass has been used, for example, to provide "privacy windows" to regulate privacy in homes and other buildings or portions thereof.
Switchable glasses typically have their optical transparency altered by disposing suspended nanoparticles in the glass and then by changing the orientation of the suspended particles. Such glasses are typically dark or opaque when in an inactive state, but become transparent when activated in response to an applied voltage.
During the use of the light control glass, the inventor finds that: when the dimming glass is applied to some tall buildings as a regulating window, after impurities and oil stains are accumulated on the surface of the dimming glass due to long-term use, the surface of the dimming glass needs to be manually cleaned so as to keep the transparency degree of the dimming glass when the dimming glass becomes transparent under the applied voltage. But the manual cleaning method is time-consuming and labor-consuming.
Disclosure of Invention
In order to improve the self-cleaning ability of the surface of the dimming glass, the application provides the intelligent dynamic dimming glass with self-cleaning function. The application provides an intelligent dynamic dimming glass of automatically cleaning adopts following technical scheme:
the utility model provides an intelligent dynamic dimming glass of automatically cleaning, includes first transparent stratum basale, second transparent stratum basale, locates the discoloration layer between first transparent stratum basale and the second transparent stratum basale, the surface coating on first transparent stratum basale and second transparent stratum basale has surface protection coating, surface protection coating includes that following parts by weight's raw materials are prepared and are obtained:
Figure BDA0003134398330000021
by adopting the technical scheme, the surface protection coating forms a homopolymer with low surface energy through the matching reaction among the raw material components, and the homopolymer is provided with the 'liquid-like' property on the surfaces of the first transparent substrate layer and the second transparent substrate layer due to the perfluorocarbon chains with the flexible spacer groups, so that the surfaces of the first transparent substrate layer and the second transparent substrate layer are not easily stained with various high-viscosity liquids, the cleanness of the dimming glass is kept, and the manual cleaning cost is reduced.
When the surface protective coating is damaged during maintenance, the surface protective coating can be repaired in a heating mode, and the protection function of the surface protective coating is recovered.
Further, a substrate protective layer is coated on the surfaces of the first transparent substrate layer and the second transparent substrate layer, and then a surface protective coating is coated on the surfaces of the first transparent substrate layer and the second transparent substrate layer; wherein, the substrate protective layer is a polyurethane film.
Through adopting above-mentioned technical scheme, the base protective layer coats in advance on first transparent stratum basale and second transparent stratum basale surface to avoid surface protection coating to take place the damage back in long-term use, first transparent stratum basale and the transparent stratum basale of second receive the injury sooner, the protection of base protective layer provides one section than long maintenance time for the maintenance and repair personnel, thereby plays the effect of protecting first transparent stratum basale and the transparent stratum basale of second more lastingly.
Further, the method for applying the surface protection coating to the surfaces of the first transparent substrate layer and the second transparent substrate layer specifically comprises the following steps:
step 1: preparing a surface protective coating polymer;
step 2: preheating the first transparent substrate layer and the second transparent substrate layer to 60-80 ℃, melting the surface protection coating polymer, and blade-coating the surface protection coating polymer on the surface of a substrate protection film;
and step 3: cooling and solidifying the surface protection coating polymer after blade coating, wherein the cooling process is carried out in two stages, the first stage controls the cooling temperature to be 10-20 ℃, and the cooling time is 20-30 min; the second stage controls the cooling temperature to be-5-0 ℃ and the cooling time to be 5-10 min.
Through adopting above-mentioned technical scheme, the surface protection coating polymer that obtains the reaction preparation melts the back and then cools off solidification to the base protection film surface, does not adopt the solvent among the coating process to make the mode of coating simpler, the difficult volatile gas that produces, improve production efficiency. Secondly, through adopting the mode of preheating first transparent stratum basale and second transparent stratum basale in advance for during the blade coating, the difference in temperature of first transparent stratum basale and second transparent stratum basale and blade coating solution is not big, thereby avoids causing the local leading cooling solidification of protection film and producing the crack because the difference in temperature is too big. The cooling process of the coating is carried out through two cooling stages, the temperature is firstly reduced to 10-20 ℃ for cooling, and then the coating is further cooled at a lower temperature, namely-5-0 ℃, so that the strength of the coating after curing is better.
Further, the raw materials of the surface protection coating also comprise 2-6 parts by weight of polyurethane repair microcapsules, the polyurethane repair microcapsules are added into the surface protection coating polymer after the surface protection coating polymer is melted in the step 2, and blade coating is carried out after the polyurethane repair microcapsules are added and stirred for 2-3 min; the polyurethane repair microcapsule selects wall materials of diphenylmethane diisocyanate and polyethylene glycol, and the core material is toluene diisocyanate.
By adopting the technical scheme, after the surface protective coating is scratched, part of the microcapsules can be scratched, so that the core materials in the microcapsules are exposed, and the core materials encapsulated in the microcapsules can be diffused into microcracks in the scratches. The base protective layer after the scratched surface protective coating is more prone to crack due to exposure, so that the core materials diffused in the scratches can simultaneously flow into the cracks of the base protective layer with cracks, the polyurethane film serving as the base protective layer is repaired, the surfaces of the first transparent base layer and the second transparent base layer in the dimming glass are prevented from being further protected to a certain extent, the repairing pressure of the dimming glass is relieved, and the use durability of the dimming glass is improved.
Furthermore, the particle size of the polyurethane repair microcapsule is 10-30 μm.
By adopting the technical scheme, when the particle size of the polyurethane repairing microcapsule is within the range of 10-30 microns, the particle size distribution range of the polyurethane repairing microcapsule is narrower, so that the surface protective coating is smoother and more compact, and the influence of the surface protective coating on the light transmission capability of the dimming glass is smaller, thereby playing the role of protecting the dimming glass and not influencing the light transmission of the dimming glass.
Further, before the polyurethane repairing microcapsule is added into the melted surface protection coating polymer, the polyurethane repairing microcapsule is cooled to 10-20 ℃.
By adopting the technical scheme, after the polyurethane repairing microcapsule is cooled to 10-20 ℃, the polyurethane repairing microcapsule and the melted surface protection coating polymer have a certain temperature difference, so that the possibility that the polyurethane repairing microcapsule is broken due to thermal expansion when the polyurethane repairing microcapsule is added into the melted surface protection coating polymer is reduced, and the failure of the core material due to premature release is avoided.
Further, before the polyurethane repair microcapsule is added to the melted surface protection coating polymer, the polyurethane repair microcapsule is modified, and the modification treatment comprises the following steps:
step 1: uniformly mixing the polyurethane repairing microcapsule, dopamine and water according to the weight ratio of 1: 2: 5, and stirring for 10-16h to obtain a polyurethane repairing microcapsule solution coated by polydopamine;
step 2: adding 2-guanidinosuccinic acid into the polyurethane repairing microcapsule solution coated with polydopamine, and stirring for 8-12h to obtain a dispersion modified polyurethane repairing microcapsule solution;
and step 3: and filtering and drying the dispersed and modified polyurethane repairing microcapsule solution to obtain the modified polyurethane repairing microcapsule.
By adopting the technical scheme, the polyurethane repairing microcapsules, dopamine and water are mixed and reacted firstly, so that the surfaces of the polyurethane repairing microcapsules are firstly wrapped and modified by the polydopamine, and then the 2-guanidinosuccinic acid is added, so that the 2-guanidinosuccinic acid can continuously react with hydroxyl or amino on the polydopamine on the surface of the activated carbon, the surfaces of the polyurethane repairing microcapsules are continuously modified, and the dispersibility of the polyurethane repairing microcapsules in the melted surface protection coating polymer is enhanced.
Furthermore, the raw material of the surface coating polymer is also added with nano stainless steel powder with the particle size of 50-100nm, and the preparation method of the surface protection coating polymer comprises the following steps:
step 1: stirring and mixing 2- (perfluorooctyl) ethyl methacrylate and N, N-dimethylformamide uniformly to obtain a mixed solution;
step 2: adding an initiator 2, 2' -azobisisobutyronitrile into the mixed solution, heating and stirring for reaction to obtain a crude product;
and step 3: cooling the crude product to room temperature, adding ether, washing, filtering, and drying to obtain a purified product;
and 4, step 4: heating and melting the purified product, then adding nano stainless steel powder, stirring and mixing uniformly, and cooling to room temperature to obtain a surface coating polymer;
wherein the weight ratio of the nano stainless steel powder to the 2- (perfluorooctyl) ethyl methacrylate is 1: 50.
By adopting the technical scheme, the addition amount of the nano stainless steel powder is small, and the influence on the light transmission of the glass is small. The nano stainless steel powder belongs to metal powder and has good heat conduction performance, and in the process of preparing the surface protection coating, the nano stainless steel powder can well transfer heat, so that the melted surface protection coating added with the polyurethane repair microcapsule can be cured on the surface of the dimming glass more quickly, the risk that the polyurethane repair microcapsule is melted or broken due to overlong heating time is reduced, and the coating efficiency of the surface protection coating is improved.
In summary, the present application has the following beneficial effects:
1. the surface of the light modulation glass is provided with the substrate protective layer and the surface protective coating, so that the surface of the light modulation glass is effectively protected, the surface of the light modulation glass is not easy to be stained with impurities or oil stains, and the cost of manual cleaning is reduced.
2. In the application, polyurethane repairing microcapsules are added into the surface protection coating, so that the substrate protection layer can be protected to a certain extent when being scratched.
3. This application carries out the preliminary treatment through modes such as modifying and cooling to polyurethane repair microcapsule for polyurethane repair microcapsule can disperse better in surface protective coating, thereby improves the repair effect to the base protection film.
Detailed Description
The present application will be described in further detail with reference to examples.
The starting materials used in the examples are all commercially available. Wherein, first transparent stratum basale, second transparent stratum basale constitute for glass, and the thickness of first transparent stratum basale, second transparent stratum basale is 1 mm. The color-changing layer is composed of a mixed liquid in which a first transparent conductor layer and a second transparent conductor layer are mixed with nano rod-shaped particles, the first transparent conductor layer and the second transparent conductor layer are composed of tin-doped indium oxide, and the nano rod-shaped particles are nano rod-shaped iron oxide. When voltage is applied to the first transparent conductor layer and the second transparent conductor layer, the nano rod-shaped particles are aligned, so that the light transmittance of the color-changing layer is improved. When no voltage is applied to the first transparent conductor layer and the second transparent conductor layer, the nano rod-shaped particles are misaligned, so that the light transmittance of the color-changing layer is reduced.
The polyethylene glycol is produced by Nantong Runfeng petrochemical company Limited.
The polyethylene glycol is polyethylene glycol 4000 produced by Haian petrochemical plant of Jiangsu province.
Toluene diisocyanate is TDI-80 produced by Wen Jute commercial company of Jinan province. 2- (perfluorooctyl) ethyl methacrylate, N-dimethylformamide and diethyl ether were purchased from Shanghai Allantin Biotech Ltd.
Preparation example
Preparation examples 1 to 3
As shown in Table 1, the main difference between the preparation examples 1 to 3 is the difference in the raw material ratio of the surface protective coating.
The following is a description of preparation example 1, and the preparation method of the surface protective coating polymer provided in preparation example 1 is as follows:
step 1: stirring 2- (perfluorooctyl) ethyl methacrylate and N, N-dimethylformamide at 65 ℃ for 30min at the rotating speed of 60r/min under the protection of nitrogen to obtain a mixed solution;
step 2: adding an initiator 2, 2' -azobisisobutyronitrile into the mixed solution, and stirring at 65 ℃ at a stirring speed of 20r/min for 24h to obtain a crude product;
and step 3: and cooling the crude product to room temperature, adding diethyl ether, stirring at a stirring speed of 20r/min for 30min, performing suction filtration, and drying at 50 ℃ to obtain the surface protection coating polymer.
TABLE 1 amount of raw materials in surface protective coating
Figure BDA0003134398330000081
Preparation example 4
The difference from preparation example 1 is that the preparation method of the surface protective coating polymer further includes step 4.
The preparation method of the surface protective coating polymer comprises the following steps:
step 1: stirring 2- (perfluorooctyl) ethyl methacrylate and N, N-dimethylformamide at 65 ℃ for 30min at the rotating speed of 60r/min under the protection of nitrogen to obtain a mixed solution;
step 2: adding an initiator 2, 2' -azobisisobutyronitrile into the mixed solution, and stirring at 65 ℃ at a stirring speed of 20r/min for 24h to obtain a crude product;
and step 3: cooling the crude product to room temperature, adding diethyl ether, stirring at a stirring speed of 20r/min for 30min, performing suction filtration, and drying at 50 ℃ to obtain a purified product;
and 4, step 4: heating the purified product to 110 ℃, maintaining the temperature of 110 ℃ until the purified product is completely melted, then adding nano stainless steel powder, stirring for 30min at a stirring speed of 20r/min, wherein the weight ratio of the nano stainless steel powder to the 2- (perfluorooctyl) ethyl methacrylate is 1: 50, and cooling to room temperature to obtain the surface coating polymer.
Examples
Example 1
The utility model provides an intelligent dynamic dimming glass of automatically cleaning, includes first transparent stratum basale, second transparent stratum basale, glues the discoloration layer between first transparent stratum basale and second transparent stratum basale, and the surface coating on first transparent stratum basale and second transparent stratum basale has the surface protection coating.
The method for applying the surface protective coating specifically comprises the following steps:
step 1: the surface protective coating polymer is heated to be completely melted and then is coated on the surfaces of the first transparent substrate layer and the second transparent substrate layer by a blade, and the thickness of the blade coating is controlled to be 1 mm.
Step 2: and cooling the coated surface protection coating polymer to room temperature to obtain the surface protection coating.
Wherein the surface protective coating polymer used in preparation example 1.
Example 2
The difference from example 1 is that the surface protective coating polymer in preparation example 2 was used.
Example 3
The difference from example 1 is that the surface protective coating polymer in preparation example 4 was used.
Example 4
The difference from example 3 is that the method of application of the surface protective coating specifically comprises the following steps:
step 1: heating the surface protection coating polymer to 110 ℃ until the organic components in the surface protection coating polymer are completely melted, and then coating the melted surface protection coating polymer on the surfaces of the first transparent substrate layer and the second transparent substrate layer by using a scraper blade, wherein the thickness of the coating is controlled to be 1 mm.
Step 2: and cooling the coated surface protection coating polymer to room temperature to obtain the surface protection coating.
Example 5
The difference from the example 3 is that before the surface protective coating is coated, the polyurethane film is hot-pressed on the surfaces of the first transparent substrate layer and the second transparent substrate layer to be used as the matrix protective layer, and then the surface protective coating is coated.
Example 6
The difference from example 3 is that the method of application of the surface protective coating specifically comprises the following steps:
step 1: heating the surface protection coating polymer to be completely melted, adding polyurethane repair microcapsules with the mass ratio of 1: 10 to the surface protection coating polymer at the moment, stirring at the stirring speed of 100r/min for 2min, and immediately scraping the mixed solution onto the surfaces of the first transparent substrate layer and the second transparent substrate layer by using a scraper, wherein the scraping thickness is controlled to be 1 mm.
Step 2: and cooling the coated surface protection coating polymer to room temperature to obtain the surface protection coating.
Wherein the particle size of the polyurethane repairing microcapsule is 5-10 μm. The polyurethane repair microcapsule selects wall materials of diphenylmethane diisocyanate and polyethylene glycol, and a core material of the polyurethane repair microcapsule is toluene diisocyanate.
Example 7
The difference from the embodiment 6 is that the particle size of the polyurethane repair microcapsule is 30-50 μm.
Example 8
The difference from the embodiment 6 is that the particle size of the polyurethane repair microcapsule is 10-30 μm.
Example 9
The difference from example 8 is that the surface protective coating polymer in preparation example 4 was used.
Example 10
The difference from example 9 is that the polyurethane repair microcapsules are first cooled to 10 ℃ before being added to the melted surface protective coating polymer.
Example 11
The difference from example 9 is that the polyurethane repair microcapsules are cooled to 15 ℃ before being added to the melted surface protective coating polymer.
Example 12
The difference from example 9 is that the polyurethane repair microcapsules are first cooled to 20 ℃ before being added to the melted surface protective coating polymer.
Example 13
The difference from example 11 is that the polyurethane repair microcapsules are modified before being added to the melted surface protective coating polymer, and the modification treatment comprises the following steps:
step 1: mixing polyurethane repair microcapsules, dopamine and water according to the weight ratio of 1: 2: 5, and stirring at the stirring speed of 60r/min for 10 hours to obtain polyurethane repair microcapsule solution coated by polydopamine;
step 2: adding 2-guanidinosuccinic acid which is in a weight ratio of 1: 3 to the dopamine added in the step (1) into the polydopamine-coated polyurethane repairing microcapsule solution, and stirring at a stirring speed of 60r/min for 8 hours to obtain a dispersion modified polyurethane repairing microcapsule solution;
and step 3: filtering the dispersed and modified polyurethane repairing microcapsule solution to obtain dispersed and modified polyurethane repairing microcapsules, and drying at 60 ℃ to obtain the modified polyurethane repairing microcapsules.
Examples 14-17 differ from example 13 only in the parameters of the polyurethane repair microcapsule modification process, as shown in table 2.
TABLE 2 polyurethane repair microcapsule modification Process parameters
Examples Stirring time (h) in step 1 Stirring time (h) in step 2
Example 14 12 8
Example 15 14 8
Example 16 16 8
Example 17 16 10
Examples 18-29 differed from example 17 only in the parameters during the preparation of the surface protective coating, as shown in table 3.
TABLE 3 parameters in the preparation of surface protective coatings
Figure BDA0003134398330000131
Figure BDA0003134398330000141
Comparative example
Comparative example 1
The difference from example 1 is that the surface protective coating is not coated on the surfaces of the first transparent substrate layer and the second transparent substrate layer.
Detection method
Oleophobic Performance detection
The method comprises the steps of taking 1m × 1 m-sized light-adjusting glass as a sample plate, erecting the sample plate, horizontally coating a piece of sunflower seed oil with the thickness of 1cm on the top of the side wall of the sample plate, standing for 20min, 40min and 1h, and then respectively observing the oil stain spreading condition on the surface of the sample plate, wherein the oil stain spreading condition is divided into 1-10 grades from small to large according to the area of the oil stain remaining on the surface of the sample plate. The results are shown in Table 4.
TABLE 4 oleophobic Performance test
Figure BDA0003134398330000142
Figure BDA0003134398330000151
Self-repair performance detection
The light-adjusting glass with the size of 1m multiplied by 1m is taken as a sample plate, then two groups of scratches are cut on the sample plate by a nicking tool, the first group of scratches defines a group A, the second group of scratches defines a group B, the number of the scratches in each group is 20, the scratches are symmetrically distributed according to the central axis of the sample plate, one side of the scratch is a group A, and the other side of the scratch is a group B. Every group mar is the average level, and the length of every mar in every group mar and the distance between the adjacent mar is equal. Wherein group a scratches only scratch the surface protective layer and group B scratches both through the surface protective layer and through the substrate protective layer. After standing for 2 weeks, observing the condition of the scratches, and classifying the scratches into 1-10 grades from small to large according to the healing degree of the scratches, wherein the 1 grade is no obvious phenomenon, and the 10 grade is basically complete healing. The average score healing rating results for each group are shown in table 5.
TABLE 5 detection results of self-repair Performance
Figure BDA0003134398330000161
Figure BDA0003134398330000171
And (4) conclusion: as can be seen from the results of the detection of the oleophobic properties in examples 1 to 29 and comparative example 1 in table 4, when the light control glass is coated on the surface protection layer in this application, the light control glass has good release property for oil stains, so that the oil stains falling on the surface of the glass can slide along the surface of the glass under the action of its own gravity.
As is clear from the results of the self-repairing of scratches in table 5, the surface protective coating to which the polyurethane repair capsule was added slowly self-repaired the polyurethane film as the base protective layer when the polyurethane film was scratched. And the scratch generated on the surface protective coating can be repaired to a certain extent through a self-repairing mechanism. The nano stainless steel powder is added, and the polyurethane repairing microcapsules are cooled in advance and modified in a mode, so that the dispersing effect and the repairing effect of the polyurethane repairing microcapsules are influenced to a certain extent.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (7)

1. The utility model provides an intelligent dynamic dimming glass of automatically cleaning, includes first transparent stratum basale, the transparent stratum basale of second, locates the discoloration layer between first transparent stratum basale and the transparent stratum basale of second, its characterized in that: the surface protection coating is coated on the surfaces of the first transparent substrate layer and the second transparent substrate layer and comprises the following raw materials in parts by weight:
3-6 parts of 2- (perfluorooctyl) ethyl methacrylate;
14-18 parts of N, N-dimethylformamide;
0.02-0.06 part of 2, 2' -azobisisobutyronitrile;
120 portions of diethyl ether and 160 portions of;
coating a substrate protective layer on the surfaces of the first transparent substrate layer and the second transparent substrate layer, and then coating a surface protective coating; wherein, the substrate protective layer is a polyurethane film.
2. The self-cleaning intelligent dynamic dimming glass as claimed in claim 1, wherein: the method for coating the surface protection coating on the surfaces of the first transparent substrate layer and the second transparent substrate layer specifically comprises the following steps:
step 1: preparing a surface protective coating polymer;
step 2: preheating the first transparent substrate layer and the second transparent substrate layer to 60-80 ℃, melting the surface protection coating polymer, and blade-coating the surface protection coating polymer on the surface of a substrate protection film;
and step 3: cooling and solidifying the surface protection coating polymer after blade coating, wherein the cooling process is carried out in two stages, the first stage controls the cooling temperature to be 10-20 ℃, and the cooling time is 20-30 min; the second stage controls the cooling temperature to be-5-0 ℃ and the cooling time to be 5-10 min.
3. The self-cleaning intelligent dynamic dimming glass as claimed in claim 2, wherein: the surface protection coating is also added with polyurethane repair microcapsules with the mass ratio of 1: 10 to the surface protection coating polymer in the coating process; the polyurethane repair microcapsule adopts wall materials of diphenylmethane diisocyanate and polyethylene glycol, and the core material is toluene diisocyanate; the adding time of the polyurethane repairing microcapsule in the step 2 is as follows: adding the surface protection coating polymer after melting, stirring for 2-3min after adding the polyurethane repair microcapsule, and performing blade coating.
4. The self-cleaning intelligent dynamic dimming glass as claimed in claim 3, wherein: the particle size of the polyurethane repair microcapsule is 10-30 μm.
5. The self-cleaning intelligent dynamic dimming glass as claimed in claim 4, wherein: before the polyurethane repairing microcapsule is added into the melted surface protection coating polymer, the polyurethane repairing microcapsule is cooled to 10-20 ℃.
6. The self-cleaning intelligent dynamic dimming glass as claimed in claim 3, wherein: before the polyurethane repairing microcapsule is added into a melted surface protection coating polymer, the polyurethane repairing microcapsule is modified, and the modification treatment comprises the following steps:
step 1: uniformly mixing the polyurethane repairing microcapsule, dopamine and water according to the weight ratio of 1: 2: 5, and stirring for 10-16h to obtain a polyurethane repairing microcapsule solution coated by polydopamine;
step 2: adding 2-guanidinosuccinic acid into the polyurethane repairing microcapsule solution coated with polydopamine, and stirring for 8-12h to obtain a dispersion modified polyurethane repairing microcapsule solution;
and step 3: and filtering and drying the dispersed and modified polyurethane repairing microcapsule solution to obtain the modified polyurethane repairing microcapsule.
7. The self-cleaning intelligent dynamic dimming glass as claimed in claim 6, wherein: the raw material of the surface coating polymer is also added with nano stainless steel powder with the particle size of 50-100nm, and the preparation method of the surface protection coating polymer comprises the following steps:
step 1: stirring and mixing 2- (perfluorooctyl) ethyl methacrylate and N, N-dimethylformamide uniformly to obtain a mixed solution;
step 2: adding an initiator 2, 2' -azobisisobutyronitrile into the mixed solution, heating and stirring for reaction to obtain a crude product;
and step 3: cooling the crude product to room temperature, adding ether, washing, filtering, and drying to obtain a purified product;
and 4, step 4: heating and melting the purified product, then adding nano stainless steel powder, stirring and mixing uniformly, and cooling to room temperature to obtain a surface coating polymer;
wherein the weight ratio of the nano stainless steel powder to the 2- (perfluorooctyl) ethyl methacrylate is 1: 50.
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Publication number Priority date Publication date Assignee Title
WO2010078649A2 (en) * 2009-01-08 2010-07-15 The University Of Western Ontario Self-cleaning coatings
CN202272826U (en) * 2011-11-01 2012-06-13 江门市蓬江区文森装饰材料有限公司 Self-cleaning glass
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WO2017116612A2 (en) * 2015-12-04 2017-07-06 United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Synthesis and development of polyurethane coatings containing flourine groups for abhesive applications

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WO2010078649A2 (en) * 2009-01-08 2010-07-15 The University Of Western Ontario Self-cleaning coatings
CN202272826U (en) * 2011-11-01 2012-06-13 江门市蓬江区文森装饰材料有限公司 Self-cleaning glass
WO2014024932A1 (en) * 2012-08-09 2014-02-13 旭硝子株式会社 Glass-sheet laminate and method for producing glass-sheet laminate
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Denomination of invention: A self-cleaning intelligent dynamic dimming glass

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