Self-powered dimming glass and preparation method thereof

Abstract

The present invention relates to the technical field of dimming glass, and proposes a self-powered dimming glass and a preparation method thereof. A self-powered dimming glass comprises, from bottom to top, an inner glass substrate, a self-powered layer, a dimming layer, an outer glass substrate, and a self-cleaning layer, and a bonding layer is arranged between two adjacent layers; the self-powered dimming glass also includes a control module arranged at the edge of the glass, the self-powered layer is connected to the control module through a wire and an inverter, and the dimming layer is connected to the control module through a wire. Through the above technical solution, the problem that the glass in the related technology cannot realize self-power generation, self-use of electricity, and has a single function is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of dimming glass, and in particular to a self-powered dimming glass and a preparation method thereof. Background Art

[0002] In the context of today's global energy transformation, the construction industry is developing rapidly in the direction of green, smart and sustainable development. Among them, building integrated photovoltaic (BIPV) technology has received widespread attention and is showing a booming trend. BIPV cleverly integrates solar photovoltaic technology with architecture, not only effectively utilizing the large area of ​​the building's facade, but also provides a practical way for buildings to transform from traditional energy consumers to energy producers.

[0003] Glass, as an indispensable and important material in the field of construction, occupies a core carrier position in building power generation applications. With the increasing diversification of building functional requirements and the continuous improvement of people's requirements for building comfort and energy saving, traditional single-function glass can no longer meet the complex needs of modern buildings. Nowadays, glass is given more and more functional expectations, and there is an urgent need to add more functions to a piece of glass.

[0004] In remote or secluded areas, such as gas stations in mountainous deserts, construction lighting signs, etc., it is often difficult to access the conventional power grid or the access cost is extremely high. Relying only on traditional backup power supplies, it is very easy to have unstable or even interrupted power supply. In the construction lighting indication scene, if the light sign cannot be powered stably, it will flicker or go out. Construction workers rely on lights to identify key information such as site boundaries and dangerous areas. Once the lights fail, in the dimly lit mountainous areas or desert nights, it is very easy for people to mistakenly enter dangerous areas, construction vehicles to collide with other safety accidents, seriously affecting the normal progress of construction and personnel safety. In these areas, the wind and sand are usually strong, and dust is easy to accumulate on the surface of the glass. For glass with power generation function, dust will block sunlight and reduce the number of photons that can reach the photovoltaic material, thereby reducing the photoelectric conversion efficiency. If the glass lacks self-cleaning ability, the dust on the glass surface will change with factors such as weather and wind and sand, causing the power generation efficiency to fluctuate, making it difficult to output electricity stably. Therefore, the development of a multifunctional glass with self-generation, self-use, and self-cleaning capabilities is an urgent problem to be solved. Summary of the invention

[0005] The present invention provides a self-generating dimming glass and a preparation method thereof, which solves the problem in the related art that the glass cannot realize self-generation and self-use of electricity and has a single function.

[0006] The technical solution of the present invention is as follows: The present invention provides a self-powered dimming glass, which includes, from bottom to top, an inner glass substrate, a self-powered layer, a dimming layer, an outer glass substrate, and a self-cleaning layer, and a bonding layer is provided between two adjacent layers; The self-generating dimming glass also includes a control module arranged at the edge of the glass, the self-generating layer is connected to the control module through a wire and an inverter, and the dimming layer is connected to the control module through a wire.

[0007] As a further technical solution, the self-generating layer is a cadmium telluride film.

[0008] As a further technical solution, the dimming layer is a PDLC (polymer dispersed liquid crystal) solid nano dimming film, and the PDLC solid nano dimming film is composed of a liquid crystal layer in the middle and ITO (indium tin oxide) films on both sides.

[0009] As a further technical solution, the self-cleaning layer comprises the following component raw materials in parts by weight: 15 to 30 parts of methyl acrylate, 0.5 to 1.5 parts of titanium dioxide, and 0.1 to 0.3 parts of a photoinitiator.

[0010] As a further technical solution, the adhesive layer is a PVB (polyvinyl butyral) layer.

[0011] As a further technical solution, the photoinitiator includes one or both of benzoin dimethyl ether and benzoin ethyl ether.

[0012] As a further technical solution, the titanium dioxide is modified titanium dioxide, and the modified titanium dioxide is obtained by modifying titanium dioxide with a modifier, and the modifier includes an azoamide compound and / or an alkenyl hydroxy ether compound.

[0013] In the present invention, azoamide compounds are used to modify titanium dioxide, reduce the agglomeration of titanium dioxide particles, promote the uniformity of distribution of titanium dioxide particles, improve the hydrophilicity of the titanium dioxide surface, thereby enhancing the light transmittance of the self-powered dimming glass and reducing the contact angle of the self-powered dimming glass.

[0014] In the present invention, an alkenyl hydroxy ether compound is used to modify titanium dioxide, which effectively prevents the mutual aggregation between particles, optimizes the refractive behavior of titanium dioxide to light, enhances the hydrophilicity of the surface of titanium dioxide, and thereby enhances the light transmittance of the self-powered dimming glass and reduces the contact angle of the self-powered dimming glass.

[0015] As a further technical solution, the azoamide compound includes one or more of azobis(N-propylenemethylpropionamide), 2,2-azobis(N-butyl 2-methylpropionamide), and azodimethyl N-2-hydroxybutylpropionamide, and the alkenyl hydroxy ether compound includes one or two of 4-hydroxybutyl vinyl ether and ethylene glycol vinyl ether.

[0016] As a further technical solution, when the modifier is composed of an azoamide compound and an alkenyl hydroxy ether compound, the mass ratio of the azoamide compound to the alkenyl hydroxy ether compound is 2-3:1.

[0017] In the present invention, an azoamide compound and an alkenyl hydroxy ether compound are added simultaneously to modify titanium dioxide, and the synergistic effect of the two is brought into play. The steric hindrance effect is used to effectively inhibit the agglomeration of titanium dioxide particles, enhance the bonding strength between the modified titanium dioxide and the glass matrix, and improve the hydrophilicity of the titanium dioxide surface, thereby enhancing the light transmittance of the self-powered dimming glass and reducing the contact angle of the self-powered dimming glass.

[0018] As a further technical solution, the preparation method of the modified titanium dioxide comprises the following steps: adding titanium dioxide into a solution containing a modifier, and after modification, centrifuging, washing and drying to obtain the modified titanium dioxide.

[0019] As a further technical solution, the mass ratio of the modifier to the titanium dioxide is 1~2:20.

[0020] As a further technical solution, the mass ratio of the titanium dioxide to the solution is 1:10.

[0021] As a further technical solution, the modification time is 4 hours and the modification temperature is 40°C.

[0022] The present invention also provides a method for preparing self-powered dimming glass, comprising the following steps: S1. Weigh methyl acrylate, titanium dioxide, and a photoinitiator, and mix them evenly to obtain a cleaning layer slurry; S2, assembling and bonding the inner glass substrate, the self-power generation layer, the dimming layer, and the outer glass substrate in sequence, spraying the self-cleaning layer slurry on the surface of the outer glass substrate, and forming a self-cleaning layer after curing to obtain a self-power generation dimming glass.

[0023] As a further technical solution, the mixing time is 20 to 30 minutes, and the curing time is 6 to 8 minutes.

[0024] The working principle and beneficial effects of the present invention are: In the present invention, light energy is efficiently converted into direct current through the built-in power-generating glass, and then converted into alternating current power that meets the dimming requirements through inversion. No external traditional power grid power supply is required, which greatly reduces the dependence on external power supply. The dimming function gives the glass good light adjustment capabilities, and the self-cleaning layer on the outer surface of the power-generating glass further enhances the practicability and maintenance convenience of the product. The power generation, dimming and self-cleaning functions are combined on a piece of glass, thereby improving the comprehensive performance of the product. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the following examples and comparative examples: Inner glass substrate: ultra-white high-quality soda-lime-silica glass, thickness 6mm; Self-generating layer: cadmium telluride film, 3.2μm thick; Dimming layer: PDLC solid nano dimming film, thickness is 1.52mm; Outer glass substrate: ultra-white high-quality soda-lime-silica glass, thickness 6mm; Adhesive layer: material is PVB, thickness is 0.76mm; Titanium dioxide: The average particle size is 10nm and the crystal form is anatase.

[0027] Example 1 A method for preparing self-powered dimming glass comprises the following steps: S1. Weigh 15 parts of methyl acrylate and 0.5 parts of titanium dioxide, mix them ultrasonically for 20 minutes, then add 0.1 parts of benzoin dimethyl ether, and mix them evenly to obtain a self-cleaning layer slurry; S2. After bonding the inner glass substrate, self-power generation layer, dimming layer and outer glass substrate in order from bottom to top, spray the self-cleaning layer slurry on the surface of the outer glass substrate with a coating thickness of 500nm. After curing under ultraviolet light for 6 minutes, a self-cleaning layer is formed to obtain self-power generation dimming glass.

[0028] Example 2 A method for preparing self-powered dimming glass comprises the following steps: S1. Weigh 20 parts of methyl acrylate and 1 part of titanium dioxide, mix them ultrasonically for 25 minutes, then add 0.2 parts of benzoin dimethyl ether, and mix them evenly to obtain a self-cleaning layer slurry; S2. After bonding the inner glass substrate, self-power generation layer, dimming layer, and outer glass substrate in order from bottom to top, spray the self-cleaning layer slurry on the surface of the outer glass substrate with a coating thickness of 500nm. After curing under ultraviolet light for 7 minutes, a self-cleaning layer is formed to obtain self-power generation dimming glass.

[0029] Example 3 A method for preparing self-powered dimming glass comprises the following steps: S1. Weigh 30 parts of methyl acrylate and 1.5 parts of titanium dioxide, add 0.3 parts of benzoin ethyl ether after ultrasonic mixing for 30 minutes, and mix well to obtain a self-cleaning layer slurry; S2. After bonding the inner glass substrate, self-power generation layer, dimming layer and outer glass substrate in order from bottom to top, spray the self-cleaning layer slurry on the surface of the outer glass substrate with a coating thickness of 500nm. After curing under ultraviolet light for 8 minutes, a self-cleaning layer is formed to obtain self-power generation dimming glass.

[0030] Example 4 The preparation method of modified titanium dioxide comprises the following steps: dispersing 1 part of azobis(N-propylenemethyl)propionamide in 200 parts of anhydrous ethanol, adding 20 parts of titanium dioxide, modifying at 40°C for 4 hours, centrifuging, washing and drying to obtain modified titanium dioxide.

[0031] Compared with Example 1, the difference of Example 4 is that titanium dioxide is replaced by an equal amount of modified titanium dioxide obtained by the above preparation method.

[0032] Example 5 Compared with Example 4, Example 5 is different in that azobis(N-propylenemethylpropionamide) is replaced with an equal amount of 2,2-azobis(N-butyl 2-methylpropionamide).

[0033] Example 6 Compared with Example 4, Example 6 is different in that azobis(N-acrylmethyl)propionamide is replaced by an equal amount of azodimethyl N-2-hydroxybutylpropionamide.

[0034] Example 7 Compared with Example 4, the difference of Example 7 is that the added amount of azobis(N-acrylmethyl)propionamide is 2 parts.

[0035] Example 8 Compared with Example 7, Example 8 is different in that azobis(N-acrylmethylpropionamide) is replaced by an equal amount of 4-hydroxybutyl vinyl ether.

[0036] Example 9 Compared with Example 7, Example 9 is different in that azobis(N-propylenemethyl)propionamide is replaced by an equal amount of ethylene glycol vinyl ether.

[0037] Example 10 Compared with Example 7, Example 10 is different in that azobis(N-acrylmethylpropionamide) is replaced with azobis(N-acrylmethylpropionamide) and ethylene glycol vinyl ether in a mass ratio of 2:1.

[0038] Embodiment 11 Compared with Example 7, Example 11 is different in that azobis(N-acrylmethylpropionamide) is replaced with azobis(N-acrylmethylpropionamide) and ethylene glycol vinyl ether in a mass ratio of 3:1.

[0039] Comparative Example 1 Compared with Example 1, the difference of Comparative Example 1 is that the self-cleaning layer is not sprayed.

[0040] The self-powered dimming glasses prepared in Examples 1 to 11 and Comparative Example 1 were tested according to the following method: 1. Visible light transmittance: Test the visible light transmittance of the sample in accordance with the test method specified in GB / T 2680-2021 "Determination of visible light transmittance, direct sunlight transmittance, total solar energy transmittance, ultraviolet transmittance and related window glass parameters of architectural glass".

[0041] 2. Contact angle: Test the contact angle of the sample according to the test method specified in GB / T 24368-2009 "Contact angle measurement method for detecting hydrophobic contaminants on glass surface".

[0042] The test results are shown in the following table: Table 1 Performance test results of self-powered dimming glass prepared in Examples 1 to 11 and Comparative Example 1

[0043] Compared with Comparative Example 1, Example 1 adds a self-cleaning layer. As a result, the visible light transmittance of Example 1 is better than that of Comparative Example 1, and the contact angle is smaller than that of Comparative Example 1, indicating that after adding the self-cleaning layer, the optical performance and self-cleaning performance of the self-powered dimming glass can be improved, thereby improving the comprehensive performance of the self-powered dimming glass.

[0044] Compared with Example 1, Examples 4 to 6 add modified titanium dioxide modified by azoamide compounds. As a result, the visible light transmittance of Examples 4 to 6 is better than that of Example 1, and the contact angle is smaller than that of Example 1, indicating that when titanium dioxide is modified with azoamide compounds, the optical properties and self-cleaning properties of the self-powered dimming glass can be improved, thereby improving the comprehensive performance of the self-powered dimming glass.

[0045] In Examples 4 to 6, different types of azodicarbonamide compounds were added to modify titanium dioxide. As a result, the visible light transmittance of Example 4 was better than that of Examples 5 and 6, and the contact angle was smaller than that of Examples 5 and 6, indicating that when the modifier used was azobis(N-propylenemethyl)propionamide, the optical properties and self-cleaning properties of the obtained self-powered dimming glass were better, and the comprehensive performance of the self-powered dimming glass was better.

[0046] Compared with Example 7, Examples 8 and 9 add modified titanium dioxide modified by alkenyl hydroxy ether compounds. As a result, the visible light transmittance of Examples 8 and 9 is better than that of Example 7, and the contact angle is smaller than that of Example 7, indicating that when titanium dioxide is modified with alkenyl hydroxy ether compounds, the optical properties and self-cleaning properties of the self-powered dimming glass can be improved, thereby improving the comprehensive performance of the self-powered dimming glass.

[0047] Compared with Example 7, Examples 10 and 11 simultaneously add azoamide compounds and alkenyl hydroxy ether compounds to modify titanium dioxide. As a result, the visible light transmittance of Examples 10 and 11 is better than that of Example 7, and the contact angle is smaller than that of Example 7, indicating that the azoamide compounds and alkenyl hydroxy ether compounds play a synergistic role in improving the optical properties and self-cleaning properties of the self-powered dimming glass, thereby improving the comprehensive performance of the self-powered dimming glass.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-powered dimming glass, characterized in that: From bottom to top, it includes an inner glass substrate, a self-generating layer, a dimming layer, an outer glass substrate, and a self-cleaning layer, and a bonding layer is arranged between two adjacent layers; the self-generating dimming glass also includes a control module arranged at the edge of the glass, the self-generating layer is connected to the control module through a wire and an inverter, and the dimming layer is connected to the control module through a wire.

2. The self-powered dimming glass according to claim 1, characterized in that: The self-generating layer is a cadmium telluride thin film.

3. The self-powered dimming glass according to claim 1, characterized in that: The dimming layer is a PDLC solid nano dimming film, and the PDLC solid nano dimming film is composed of a liquid crystal layer in the middle and ITO films on both sides.

4. The self-powered dimming glass according to claim 1, characterized in that: The self-cleaning layer comprises the following raw materials in parts by weight: 15 to 30 parts of methyl acrylate, 0.5 to 1.5 parts of titanium dioxide, and 0.1 to 0.3 parts of a photoinitiator.

5. The self-powered dimming glass according to claim 4, characterized in that: The photoinitiator includes one or both of benzoin dimethyl ether and benzoin ethyl ether.

6. The self-powered dimming glass according to claim 4, characterized in that: The titanium dioxide is modified titanium dioxide, which is obtained by modifying titanium dioxide with a modifier, and the modifier includes an azoamide compound and / or an alkenyl hydroxy ether compound.

7. The self-powered dimming glass according to claim 6, characterized in that: The azoamide compound includes one or more of azobis(N-propylenemethylpropionamide), 2,2-azobis(N-butyl 2-methylpropionamide), and azodimethyl N-2-hydroxybutylpropionamide; and the alkenyl hydroxy ether compound includes one or two of 4-hydroxybutyl vinyl ether and ethylene glycol vinyl ether.

8. The self-powered dimming glass according to claim 6, characterized in that: When the modifier consists of an azoamide compound and an alkenyl hydroxy ether compound, the mass ratio of the azoamide compound to the alkenyl hydroxy ether compound is 2 to 3:

1.

9. The self-powered dimming glass according to claim 6, characterized in that: The preparation method of the modified titanium dioxide comprises the following steps: adding titanium dioxide into a solution containing a modifier, centrifuging, washing and drying after modification to obtain the modified titanium dioxide.

10. The method for preparing the self-powered dimming glass according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Weigh methyl acrylate and titanium dioxide, disperse them evenly, add a photoinitiator, and mix them evenly to obtain a cleaning layer slurry; S2, assembling and bonding the inner glass substrate, the self-power generation layer, the dimming layer, and the outer glass substrate in sequence, spraying the self-cleaning layer slurry on the surface of the outer glass substrate, and forming a self-cleaning layer after curing to obtain a self-power generation dimming glass.

Images