TWI541425B - Self-dimming smart glass and fabrication method thereof - Google Patents

Description

Intelligent dimming glass and manufacturing method thereof

The invention relates to a dimming glass and a manufacturing method thereof, in particular to a smart dimming glass capable of self-dimming and a manufacturing method thereof.

In order to improve indoor lighting, reduce the use of lamps, and bring outdoor landscapes into indoor spaces, most modern large office buildings, public buildings and family homes often replace large original buildings with large continuous glass windows or transparent plastic windows. Exterior walls and a variety of narrow windows. Although the natural lighting of the building interior is increased, the sunlight causes the ambient temperature of the glass building to rise. The solar radiation is mainly short-wavelength ultraviolet light, visible light and long-wavelength near-infrared light, which can easily penetrate most glass or transparent plastic windows, and then immediately absorbed by the interior decoration and decoration. Generally, the decoration and decoration absorb the electromagnetic wave of the sun and release the heat energy, and the energy is mostly released in the form of long-wavelength infrared light, and the long-wave radiation cannot penetrate the glass or the transparent plastic, thereby causing the accumulation of the indoor thermal energy, further enabling The indoor environment temperature is constantly increasing, and this phenomenon is called the greenhouse effect.

In order to maintain the comfort of the glass building indoor environment, air conditioning equipment is required The power is bound to increase, and the energy consumption is correspondingly increased. This loss can be several times the energy consumption of the general masonry infill wall building. In order to reduce the power consumption, the glass demand for changing the solar radiation transmittance according to the external environmental conditions and the power intensity used can be greatly improved. The use of such glass can make the illumination of buildings with large-area glass surfaces, The energy load required for cooling and insulation is greatly reduced. In recent years, a variety of science and technology have been applied to the development of Smart Glass, which is widely known and has been applied to commodities: Liquid Crystals The use, electrophoretic devices, Suspended-Particle Devices, and Chromic Materials, wherein the color-changing materials can be classified into electrochromic materials (electrochromic materials), gas-chromic materials (Gasochromic) Materials), Photoochromic Materials, and Thermochromic Materials. Among the four materials, photochromic materials and thermochromic materials can change color with the light and temperature in the environment. However, with today's technical means and analysis of the effects obtained, maintaining the transparency of the smart dimming glass and adjusting the required light transmittance is still an insurmountable problem when applied to glass buildings.

Ideal for intelligent dimming glass, in addition to controlling the different light transmittances of solar radiation in different spectral ranges, it is extremely important to extend the service life and change the light transmittance without material degradation or component loss. Furthermore, the time required to increase or decrease the light transmittance process is also one of the determining factors. This factor is often referenced to the time required to achieve 90% of the highest light transmittance. The shorter the time required, the practicality. The higher the height, the more intelligent The dimming time required for light glass often increases with the glass area. In addition, the maximum area that can be made of dimming glass, the energy required for use, the power required for operation, and the ambient temperature that can be used are all considered by manufacturers to be used in real life. The factor in the middle.

The technology of smart glass, which is often used to control the transparency of glass buildings and the transparency of vehicle windows, is mainly used for electrochromic materials and thermochromic materials, and is different for smart dimming glass made of electrochromic materials. The supply of intensity current causes a continuous redox reaction on the material, which changes the color and transparency of the material, thereby changing the solar transmittance. However, this system requires a continuous supply of electricity, resulting in energy loss. 5 watts per square meter (W/m ² ) to 20 watts per square meter. In addition, the low stability of the material under long-term exposure to ultraviolet light and the need for high preparation costs are also problems to be solved. Thermochromic materials can display different colors at different ambient temperatures. Among them, the most suitable materials for large-area smart dimming glass are vanadium oxide (Vanadium(IV) Oxide, VO ₂ ) and its various derivatives. This kind of material has better transparency only when it is relatively high temperature and relatively low temperature, thus limiting its applicability. Therefore, finding a material with a change in visible light transmittance under normal temperature conditions is still necessary to overcome the preparation of heat-induced dimming glass. Puzzle. Therefore, the development of a new technology or new materials to produce a stable, long-life, low-energy, and intelligent dimming glass that can be used at room temperature can have a profound impact on related industries.

Accordingly, it is an object of the present invention to provide an intelligent dimming glass and a method of manufacturing the same, and it is expected that various problems described above can be solved.

According to one embodiment of the present invention, an intelligent light-adjusting glass is provided, which comprises: a first glass, a first porous film, a polymer film, a second porous film, and a The second glass and a volatile solution. The first porous film is disposed on the first glass and has a plurality of first holes. The polymer film is provided on the first porous film. The second porous film is provided on the polymer film, and the second porous film has a plurality of second holes. The second glass is disposed outside the second porous film, and a closed space is formed between the second glass and the second porous film. The volatile solution is filled in the enclosed space.

As used herein, the second porous film, the polymer film, the first porous film, and the first glass are attached or formed on the surface of the object to be provided. In short, the first glass, the first porous film, the polymer film, and the second porous film are laminated in series, and the orientation relationship of each layer in space is not a concern of the present embodiment.

According to the embodiment of the structural aspect, the present invention can be caused by the condensation of the volatile solution filled in the closed space on the second glass or the second porous film due to the temperature, thereby causing the refractive index of the second porous film to be generated. Change, and thus change the amount of reflection of near-infrared light.

Other implementations of the foregoing structural aspect embodiments include, for example, each of the first holes may have a first diameter, and each of the second holes may have a second diameter, and the first diameter may be smaller than the second diameter. Each of the foregoing first holes may have a first diameter, and each of the second holes may have a second diameter, wherein One diameter may range from 100 nanometers to 200 nanometers, and the second diameter may range from 350 nanometers to 1000 nanometers. Each of the foregoing first holes may have a first diameter, and each of the second holes may have a second diameter, wherein the first diameter may be 190 nm and the second diameter may be 500 nm. The plurality of first holes are spaced apart from each other by a first distance, and about 95% of the plurality of first distances are of uniform size. The plurality of second holes are spaced apart from each other by a second distance, and about 95% of the plurality of second distances are of uniform size. The aforementioned volatile solution may be ethanol.

According to one embodiment of a method aspect of the present invention, a method for manufacturing a smart dimming glass is provided, the method comprising: preparing a monomer mixture. A first suspension is prepared, the first suspension comprising a plurality of first nanoparticles and a monomer mixture. A second suspension is prepared, the second suspension comprising a plurality of second nanoparticles and a monomer mixture. The first suspension is applied to a first glass. The first suspension is irradiated with ultraviolet light to polymerize and cure the first suspension into a first film. A monomer mixture is applied to the first film. The monomer mixture is polymerized and cured into a polymer film by irradiating the monomer mixture with ultraviolet light. A second suspension is applied to the polymer film. The second suspension is irradiated with ultraviolet light to polymerize and cure the second suspension into a second film. The first nanoparticle of the first film is removed by an etching solution to form a first porous film, and the second nanoparticle of the second film is removed to form a second porous film. A second glass is assembled outside the second porous film and a closed space is formed between the second glass and the second porous film. A volatile solution is added to the enclosed space.

With this embodiment of the method aspect, the invention can be filled in a closed The volatile solution in the space condenses on the second glass or the second porous film due to the temperature, causing a change in the refractive index of the second porous film, thereby changing the amount of reflection of the near-infrared light.

Other embodiments in the foregoing method aspect embodiments include the following: each of the foregoing first nano particles may have a diameter of 100 nm to 200 nm, and each of the second nano particles may have a diameter of 350 nm to 1000 nm. . Each of the foregoing first nanoparticles may have a diameter of 190 nm, and each of the second nanoparticles may have a diameter of 500 nm. The foregoing monomer mixture may comprise a first ethoxylated trimethylolpropane triacrylate (OE/OH = 14/3) and a second ethoxylated trimethylolpropane triacrylate (OE/ OH=7/3). The first ethoxylated trimethylolpropane triacrylate (OE/OH=14/3) is divided by the second ethoxylated trimethylolpropane triacrylate (OE/OH=7/3) A ratio is obtained in which the ratio can be from 0.1 to 0.4. The first ethoxylated trimethylolpropane triacrylate (OE/OH=14/3) is divided by the second ethoxylated trimethylolpropane triacrylate (OE/OH=7/3) A ratio is obtained in which the ratio can be 0.2. The aforementioned ultraviolet light intensity may be 80 milliwatts/cm 2 . The aforementioned etching solution may be hydrofluoric acid. The first nanoparticle and the second nanoparticle described above may be made of cerium oxide. The first nanoparticle has a first refractive index, the second nanoparticle has a second refractive index, and the monomer mixture has a third refractive index, wherein the first refractive index, the second refractive index and the third refractive index The rate is the same size. The aforementioned volatile solution has a fourth refractive index, and the fourth refractive index may be smaller than the third refractive index. The aforementioned volatile solution may be ethanol.

100‧‧‧Smart dimming glass

110‧‧‧First glass

120‧‧‧First porous film

121‧‧‧ first hole

130‧‧‧ polymer film

140‧‧‧Second porous film

141‧‧‧Second hole

141A‧‧‧second diameter

150‧‧‧closed space

160‧‧‧second glass

170‧‧‧ volatile solution

200‧‧‧ scraper

300‧‧‧First suspension

500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 510, 511 ‧ ‧ steps

U‧‧‧UV light

V‧‧‧ visible light

N‧‧‧Near-infrared light

FIG. 1 is a flow chart showing a method for manufacturing the smart dimming glass of the present invention.

Figure 2 is a perspective view of step 503 in Figure 1.

FIG. 3A is a cross-sectional view of the secondary electron micrograph after step 509 in FIG. 1 .

FIG. 3B is a top view of the secondary electron micrograph after step 509 in FIG. 1.

FIG. 4A is a schematic view showing an embodiment of the smart dimming glass of the present invention.

FIG. 4B is a schematic view showing another embodiment of the smart dimming glass of the present invention.

Figure 5 is a graph showing the wavelength-reflectance curve of the smart dimming glass of the present invention.

Photonic crystals are dielectric materials with a regular periodic arrangement of nano-lattice structures in one-dimensional, two-dimensional, or three-dimensional space. This lattice structure can affect the propagation of electromagnetic waves (Electromagnetic Waves). The lattice structure determines whether photons of different wavelengths can propagate in this photonic crystal, and the wavelength of the electromagnetic waves of the diffraction (Diffractions) is about twice that of the photonic crystal structure. For example, a photonic crystal with a structure period of about 200 nm can circulate a blue-colored light wave (a blue light wavelength of about 400 nm), and a photonic crystal with a structure period of about 350 nm can circulate a red-colored light wave ( The red wavelength is about 700 nm). Therefore, if a large-area regular nanostructure with a structure period of less than 200 nm and greater than 350 nm can be fabricated, the photonic crystal can selectively diffract ultraviolet light and near-infrared. Light and let visible light penetrate to maintain good transparency.

Please refer to FIG. 1 , which is a flow chart of a method for manufacturing a smart dimming glass according to the present invention. The method includes the following steps: Step 500 , preparing a monomer mixture. In step 501, a first suspension is prepared. The first suspension comprises a plurality of first nanoparticles and a monomer mixture. In step 502, a second suspension is prepared. The second suspension comprises a plurality of second nanoparticles and a monomer mixture. Step 503, coating the first suspension on a first glass. In step 504, the first suspension is irradiated with ultraviolet light to polymerize and cure the first suspension into a first film. Step 505, coating a monomer mixture onto the first film. Step 506, irradiating the monomer mixture with ultraviolet light to polymerize and cure the monomer mixture into a polymer film. In step 507, a second suspension is applied to the polymer film. Step 508, irradiating the second suspension with ultraviolet light to polymerize and cure the second suspension into a second film. Step 509, removing the first nanoparticle of the first film by using an etching solution to form a first porous film, and removing the second nanoparticle of the second film to form a second porous film. Step 510, assembling a second glass outside the second porous film, and forming a closed space between the second glass and the second porous film. In step 511, a volatile solution is added to the enclosed space.

In steps 500, 501 and 502, the monomer mixture is selected from Ethoxylated Trimethylolpropanetriacrylate (ETPTA), which is because the cerium oxide particles and the monomer mixture have a similar refractive index. Overcoming the van der Waals force between the cerium oxide particles and the monomer mixture, and ethoxylated trimethylolpropane triacrylate (refractive index 1.46) is a minority A monomer mixture in which cerium oxide particles (refractive index of 1.42) were uniformly dispersed.

In the above step 501, wherein the first nanoparticle is made of cerium oxide, wherein the first nanoparticle is a 190 nm diameter cerium oxide particle and has a uniform diameter distribution (diameter variability of less than 5%). In the above step 502, wherein the second nanoparticle is made of cerium oxide, wherein the second nanoparticle is a cerium oxide particle having a diameter of 500 nm and has a uniform diameter distribution (diameter variability of less than 5%). Before synthesizing the first suspension and the second suspension, the first nanoparticle and the second nanoparticle are first washed with anhydrous alcohol and centrifuged several times to remove the first nanoparticle and the second nanoparticle. Surface catalyst.

In the above step 501, wherein the suspension is mixed with 190 nm cerium oxide particles (74 wt.%), a monomer mixture (24 wt.%), and a photoinitiator (Darocur 1173, 2 wt.%), wherein the monomer mixture is a first ethoxylated trimethylolpropane triacrylate (OE/OH = 14/3) and a second ethoxylated trimethylolpropane triacrylate (OE/OH = 7/3), And the ratio of the first ethoxylated trimethylolpropane triacrylate (OE/OH=14/3) to the second ethoxylated trimethylolpropane triacrylate (OE/OH=7/3) Between 0.1 and 0.4, then 190 nm of cerium oxide particles, a monomer mixture, and a photoinitiator are uniformly mixed by a vortex stirring mixer, and the transparent viscous first suspension is placed in a dark room. For four hours, a small amount of the alcohol cleaning solution remaining in the first suspension was allowed to evaporate for a sufficient period of time.

In the above step 502, wherein the suspension is mixed with 500 nm of cerium oxide particles (74 wt.%), a monomer mixture (24 wt.%), and a photoinitiator. (Darocur 1173, 2wt.%), wherein the monomer mixture is a first ethoxylated trimethylolpropane triacrylate (OE/OH = 14/3) and a second ethoxylated trimethylol Propane triacrylate (OE/OH = 7/3), and first ethoxylated trimethylolpropane triacrylate (OE/OH = 14/3) and second ethoxylated trimethylolpropane The ratio of triacrylate (OE/OH=7/3) is between 0.1 and 0.4, and then 500 nm of cerium oxide particles, a monomer mixture, and a photoinitiator are uniformly mixed by a vortex mixer. The transparent viscous first suspension is placed in the dark room for twenty-four hours, so that a small amount of the alcohol cleaning liquid remaining in the second suspension has sufficient time to volatilize.

In the above step 504, after the first glass is coated with the first suspension through the step 503, it is required to irradiate with high-intensity ultraviolet light (80 mW/cm 2 ) for 30 seconds to make the monomer mixture in the first suspension. It was polymerized and cured to obtain a first film in which the first film had 190 nm of cerium oxide particles.

In the above step 506, after the first glass is coated with the monomer mixture in step 505, high-intensity ultraviolet light (80 mW/cm 2 ) is used for radiation exposure for 30 seconds, and the monomer mixture is polymerized and cured to obtain a polymer. membrane.

In the above step 508, after the polymer film is coated with the second suspension in step 507, it is irradiated with high-intensity ultraviolet light (80 mW/cm 2 ) for 30 seconds to make the monomer mixture in the second suspension. It was polymerized and cured to obtain a second film in which the second film had 500 nm of cerium oxide particles.

In the above step 509, the etching solution is selected from a hydrofluoric acid aqueous solution (2 vol %), which is immersed in an aqueous solution of hydrofluoric acid (2 vol %) for several minutes to remove 190 nm of cerium oxide particles in the first film and 500 nm of cerium oxide particles in the second film, followed by The deionized water is infiltrated and then blown dry with nitrogen to obtain a first porous film and a second porous film in which the pores are arranged in three dimensions.

In the above step 511, the volatile solution is selected from ethanol. The refractive index of ethanol is 1.36 which is slightly smaller than the refractive index of ethoxylated trimethylolpropane triacrylate (refractive index is 1.46) and the refractive index (refractive index of cerium oxide particles). Is 1.42).

Please refer to FIG. 2, which is a perspective view of step 503 in FIG. 1. As can be seen from Fig. 2, step 503 is a first blade glass in which the doctor blade 200 is vertically placed by using a Roller-To-Roll Process (Doctor Blade Coating Technologies; DBC). 110, and the first suspension 300 prepared in the previous step 501 is placed on the first glass 110 on one side of the scraper 200, at this time, the coated first glass 110 is dragged at a constant speed using an injection pump, and is stationary. The scraper 200 can evenly coat the first suspension 300 on the first glass 110 and give the first suspension 300 a unidirectional shear force to cause the cerium oxide nanoparticle in the first suspension 300. The particles are regularly arranged.

Please also refer to Figures 3A and 3B. FIG. 3A is a cross-sectional view of the secondary electron micrograph after step 509 in FIG. 1 , and FIG. 3B is a top view of the second electron micrograph after step 509 in FIG. 1 . As shown in FIG. 3A, the structure after step 509 includes: a first glass 110, a first porous film 120, a polymer film 130, and a second porous thin film. Film 140. It can be seen from FIG. 3A that after the etching solution of step 509 is etched, the pores of the first porous film 120 and the second porous film 140 are closely arranged in a large area and remain intact without collapse, wherein the first porous About 95% of the holes of the film 120 and the second porous film 140 are uniform in size. As can be seen from FIG. 3B, the second porous film 140 after etching by the etching solution of step 509 has a plurality of second holes 141, and the second holes 141 have a second diameter 141A, wherein the second The diameter 141A is 500 nm, and about 95% is the same size.

Please also refer to Figures 4A and 4B. 4A is a schematic view showing an embodiment of the smart dimming glass of the present invention, and FIG. 4B is a schematic view showing another embodiment of the smart dimming glass of the present invention. 4A and 4B, the smart dimming glass 100 of the present invention comprises a first glass 110, a first porous film 120, a polymer film 130, and a second porous film 140. A second glass 160 and a volatile solution 170. The first porous film 120 is disposed on the first glass 110 and has a plurality of first holes 121. The polymer film 130 is provided on the first porous film 120. The second porous film 140 is provided on the polymer film 130 and has a plurality of second holes 141. The second glass 160 is disposed outside the second porous film 140, and a closed space 150 is formed between the second glass 160 and the second porous film 140. The volatile solution 170 is filled in the enclosed space 150. It should be particularly noted that FIGS. 4A and 4B are actual use examples (for example, windows) of the present embodiment, and the above-mentioned means are referred to as second porous film, polymer film, and A porous film and a first glass are laminated in sequence. Taking FIG. 4A and FIG. 4B as an example, when the light is incident from the right side of the smart dimming glass, the above-mentioned finger is disposed on the left side. Although the stacking order of the layers is always the same, the relative orientation in the space may be changed due to the orientation of the smart dimming glass. Therefore, the above refers to the setting on the surface or one side, and should not be understood only. To set it on top of another layer. The diameter of the first hole 121 is smaller than the diameter of the second hole 141. The first glass 110 of the smart light-adjusting glass 100 of the present invention is mounted on the outdoor side, and the second glass 160 is mounted on the indoor side. The above volatile solution 170 is ethanol. It can be seen from 4A that when the outdoor temperature is lower than the indoor temperature (when the temperature of the right side of the first glass 110 is lower than the glass of the left side of the second glass 160), the ethanol will condense in the second hole 141 of the second porous film 140, according to Kelvin equation (RT ln(P _r /P _o )=-2 γ V _m COS θ /r, where R is the gas constant, T is the absolute temperature, P _o is the saturated vapor pressure, γ is the liquid surface tension, and V _m is Liquid molar volume) It can be seen that the variable parameters of the left and right sides of the equal sign are P _r (ethanol vapor pressure) and r (hole size), respectively, so when the outdoor temperature is lower than the indoor temperature, it means P _r ( The value of the vapor pressure of ethanol is small, and r (hole size) is also small. Therefore, from the Kelvin equation, it is known that ethanol tends to condense in the second hole 141 when the outdoor temperature is lower than the room temperature; by the law of Bragg diffraction (Prague diffraction law) :λ _peak =2 n _eff d sin θ, where λ _peak is the diffraction wavelength, n _eff is the effective refractive index, d is the distance between the lattice layer and the layer, and θ is the diffraction angle. It is known that when ethanol condenses in the second when the holes 141, 140 will result in the effective refractive index of the second porous film (n _eff) becomes large, the second Hole film 140 diffraction wavelength (λ _peak) becomes large, and thus the porous film 140 of the second near-infrared light not diffracted N, so smart glass 100 through only the ultraviolet light diffracted U, visible light V And the near-infrared light N penetrates, because the near-infrared light N can penetrate the smart dimming glass 100, which can cause a greenhouse effect in the room and increase the indoor temperature.

Conversely, if the outdoor temperature is higher than the indoor temperature (the temperature on the right side of the first glass 110 is higher than the glass on the left side of the second glass 160), as shown in FIG. 4B, when the outdoor temperature is higher than the indoor temperature, it means P _r ( When the value of the vapor pressure of ethanol is large, r (hole size) is also large. Therefore, it is known from the Kelvin equation that when the outdoor temperature is higher than the indoor temperature, the ethanol (volatile solution 170) tends to condense on the second glass 160 after volatilization. The effective refractive index (n _eff ) of the second porous film 140 is not changed. At this time, the first porous film 120 diffracts the ultraviolet light U, and the second porous film 140 diffracts the near-infrared light N. The visible light V can penetrate the smart dimming glass 100, thereby blocking the damage of the ultraviolet light U to the human skin and reducing the greenhouse effect caused by the near-infrared light N; the above-mentioned ethanol volatilization is condensed on the second glass 160 or the second porous film 140. The second hole 141 is a reversible process, has good reproducibility and does not require external power. Therefore, the smart dimming glass 100 of the present invention is a smart dimming glass 100 capable of self-adjusting the amount of near-infrared light N reflection.

Please refer to FIG. 5, which is a graph showing the wavelength-reflectance of the smart dimming glass of the present invention. It uses a UV-Visible-NIR spectrometer to measure the wavelength and intensity of the diffracted light of the smart dimming glass in the vertical direction. It can be seen from Fig. 5 that the optical reflection spectrum of the transparent glass at a wavelength of 300 to 1000 nm has a reflectance of about 10%; the smart dimming glass of the present invention is outdoor with respect to the optical reflection spectrum of the transparent glass. When the temperature is lower than the indoor temperature (as shown in Figure 4A), the optical reflection spectrum peaks are located at 350 nm and 900 nm. The two spectral peaks prove that the reflected light is composed of its three-dimensional regular structure. Caused by the diffraction of Prague, the first hole is about 190 nm of the first porous film, which can circulate the ultraviolet light wave, and the second hole is about 500 nm of the second porous film, which can make The near-infrared light is diffracted and has no significant reflection in the visible region. Therefore, the smart dimming glass does not cause visible light to be diffracted, thereby avoiding light pollution; when the smart dimming glass of the present invention is higher than the indoor temperature (as shown in FIG. 4B), the ethanol condenses in the second porous In the 500 nm hole of the film, the reflection spectrum peak of the smart dimming glass only appears at 350 nm, so the smart dimming glass can still scatter the ultraviolet light wave without the visible light and the near infrared light. Shot, this result should prove that the smart dimming glass can self-adjust the amount of near-infrared light reflection.

In summary, the smart dimming glass of the present invention and the method of manufacturing the same have the following advantages:

First, the stationary blade is placed vertically on the first glass, and a unidirectional shear force is provided through the first suspension between the blade and the first glass, while removing the coating material of the excess suspension. This process is a Roll-To-Roll Process, which is suitable for large-area manufacturing, and the process cost is low.

Secondly, the present invention can change the refractive index of the second porous film by the condensation of the volatile solution (ethanol) on the second hole of the second glass or the second porous film, thereby changing the amount of near-infrared light reflection. .

Thirdly, the volatile solution (ethanol) can be automatically adjusted by the indoor and outdoor temperature difference to condense on the second hole of the second glass or the second porous film, the process does not need external energy, and the volatilization process has high reproducibility and short time.

Although the present invention has been disclosed in the above embodiments, it is not used The scope of the present invention is defined by the scope of the appended claims, unless otherwise claimed.

100‧‧‧Smart dimming glass

110‧‧‧First glass

120‧‧‧First porous film

121‧‧‧ first hole

130‧‧‧ polymer film

140‧‧‧Second porous film

141‧‧‧Second hole

150‧‧‧closed space

160‧‧‧second glass

170‧‧‧ volatile solution

U‧‧‧UV light

V‧‧‧ visible light

N‧‧‧Near-infrared light

Claims (19)

An intelligent light-adjusting glass comprising: a first glass; a first porous film disposed on the first glass, the first porous film having a plurality of first holes; a polymer film; Provided on the first porous film; a second porous film disposed on the polymer film, the second porous film having a plurality of second holes; and a second glass disposed on The second porous film is outside, and a closed space is formed between the second glass and the second porous film; and a volatile solution is filled in the closed space. The smart dimming glass of claim 1, wherein each of the first holes has a first diameter, each of the second holes has a second diameter, and the first diameter is smaller than the second diameter. The smart dimming glass of claim 1, wherein each of the first holes has a first diameter, and each of the second holes has a second diameter, the first diameter being 100 nm to 200 nm, the first The two diameters range from 350 nm to 1000 nm. The smart dimming glass of claim 1, wherein each of the first holes has a first diameter, and each of the second holes has a second diameter, the first diameter is 190 nm, and the second diameter is 500. Nano. The smart dimming glass of claim 1, wherein the first holes are spaced apart from each other by a first distance, and about 95% of the first distances are uniform in size. The smart dimming glass of claim 1, wherein the second holes are spaced apart from each other by a second distance, and about 95% of the second distances are of uniform size. The smart dimming glass of claim 1, wherein the volatile solution is ethanol. A method for manufacturing a smart dimming glass, the method comprising: (a) preparing a monomer mixture; (b) preparing a first suspension, the first suspension comprising a plurality of first nano particles and the monomer mixture; (c) preparing a second suspension comprising a plurality of second nanoparticles and the monomer mixture; (d) coating the first suspension on a first glass; (e) utilizing Irradiating the first suspension with ultraviolet light to polymerize and cure the first suspension into a first film; (f) coating the monomer mixture on the first film; (g) irradiating the monomer mixture with ultraviolet light , the monomer mixture is polymerized and cured into a polymer film; (h) applying a second suspension to the polymer film; (i) irradiating the second suspension with ultraviolet light to polymerize the second suspension into a second film; (j) using an etching solution Removing the first nanoparticles of the first film to form a first porous film, and removing the second nanoparticles of the second film to form a second porous film; (k) And assembling a second glass outside the second porous film, and forming a closed space between the second glass and the second porous film; and (1) adding a volatile solution in the closed space. The method for manufacturing a smart dimming glass according to claim 8, wherein each of the first nanoparticles has a diameter of 100 nm to 200 nm, and each of the second nanoparticles has a diameter of 350 nm to 1000 nm. . The method of manufacturing a smart dimming glass according to claim 9, wherein each of the first nanoparticles has a diameter of 190 nm, and each of the second nanoparticles has a diameter of 500 nm. The method of manufacturing a smart dimming glass according to claim 8, wherein the monomer mixture comprises a first ethoxylated trimethylolpropane triacrylate (OE/OH=14/3) and a second ethoxylate. The trimethylolpropane triacrylate (OE/OH = 7/3). The method for manufacturing a smart dimming glass according to claim 11, wherein The first ethoxylated trimethylolpropane triacrylate (OE/OH=14/3) is divided by the second ethoxylated trimethylolpropane triacrylate (OE/OH=7/3) A ratio is obtained in which the ratio is from 0.1 to 0.4. The method of manufacturing a smart dimming glass according to claim 12, wherein the first ethoxylated trimethylolpropane triacrylate (OE/OH=14/3) is divided by the second ethoxylated trimer Methylpropane triacrylate (OE/OH = 7/3) gave a ratio where the ratio was 0.2. The method of manufacturing a smart dimming glass according to claim 8, wherein the ultraviolet light intensity of the step (e), the step (g) and the step (i) is 80 mW/cm ² . The method of manufacturing the smart dimming glass according to claim 8, wherein the etching liquid of the step (j) is hydrofluoric acid. The method for manufacturing a smart dimming glass according to claim 8, wherein the first nano particles and the second nanoparticles are made of cerium oxide. The method of manufacturing a smart dimming glass according to claim 8, wherein the first nanoparticles have a first refractive index, the second nanoparticles have a second refractive index, and the monomer mixture has a first The tri-index, the first index of refraction, and the second index of refraction are consistent with the third index of refraction. The method of manufacturing a smart dimming glass according to claim 17, wherein the volatile solution has a fourth refractive index, and the fourth refractive index is smaller than the third refractive index. The method of manufacturing a smart dimming glass according to claim 8, wherein the volatile solution of the step (1) is ethanol.