Composite hydrogel and high and low temperature double-control energy-saving intelligent window

Abstract

The invention discloses a composite hydrogel and a high and low temperature double-control energy-saving intelligent window, and belongs to the technical field of intelligent windows. The composite hydrogel comprises a high-temperature phase transition hydrogel layer and a low-temperature phase transition hydrogel layer which are attached to each other, when the temperature is higher than a high-temperature threshold value, the high-temperature phase transition hydrogel layer is in an opaque state, and when the temperature is lower than the high-temperature threshold value, the high-temperature phase transition hydrogel layer is in a transparent state; when the temperature is lower than a low-temperature threshold value, the low-temperature phase-transition hydrogel layer is in an opaque state, and when the temperature is higher than the low-temperature threshold value, the low-temperature phase-transition hydrogel layer is in a transparent state. The high-low temperature double-control energy-saving intelligent window sequentially comprises upper-layer glass, composite hydrogel and lower-layer glass. The intelligent window manufactured on the basis of the composite hydrogel has high and low temperature dual regulation and control functions, namely transparency change can be achieved when the temperature is too high or too low, and therefore heat transfer is reduced, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent windows, and particularly relates to a composite hydrogel and a high-low temperature dual-control energy-saving intelligent window. Background Art

[0002] Global warming and energy consumption are gradually increasing. Among them, about 40% of energy consumption comes from the insulation, refrigeration, etc. of buildings. Therefore, improving the energy efficiency of buildings has become a key means to improve global warming. The heat insulation performance of traditional windows is poor, resulting in a large amount of energy loss. In recent years, as an energy-saving technology that can dynamically adjust the light transmittance according to environmental stimuli, intelligent windows have received extensive attention.

[0003] The research direction of existing intelligent windows mostly focuses on single-performance thermochromic hydrogels, and most of them undergo a transparent-opaque transition under heat stimulation, thereby reducing the light transmittance. That is, they reflect light sources and heat sources from entering the room, isolate the heat transferred from the outside to the inside, and thus save the energy for indoor cooling to achieve energy conservation and emission reduction. However, currently, there are few that can undergo a transparent-opaque transition under both overheating and overcooling stimuli. When the environmental temperature is relatively low, a large amount of heat will be transferred from the indoor to the outdoor, which will increase the energy for indoor heating and cannot achieve energy conservation and emission reduction. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite hydrogel and a high-low temperature dual-control energy-saving intelligent window to solve the problem that existing intelligent windows cannot undergo a transparent-opaque transition under both overheating and overcooling stimuli, and thus cannot achieve energy conservation and emission reduction when the environmental temperature is relatively low.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A composite hydrogel, characterized in that it includes: a high-temperature phase-transition hydrogel layer and a low-temperature phase-transition hydrogel layer that are mutually adhered; when the temperature is higher than the high-temperature threshold, the high-temperature phase-transition hydrogel layer is in an opaque state, and when the temperature is lower than the high-temperature threshold, the high-temperature phase-transition hydrogel layer is in a transparent state; when the temperature is lower than the low-temperature threshold, the low-temperature phase-transition hydrogel layer is in an opaque state, and when the temperature is higher than the low-temperature threshold, the low-temperature phase-transition hydrogel layer is in a transparent state.

[0007] Further, the above high-temperature phase-transition hydrogel layer is polymerized from N-isopropylacrylamide, persulfamide, polyether pluronic diacrylate, acrylic acid, tetramethylethylenediamine, and deionized water under low-temperature conditions; the volume-mass ratio of N-isopropylacrylamide, persulfamide, polyether pluronic diacrylate, tetramethylethylenediamine, and deionized water is: 400 mg : (10 - 80) mg : (10 - 100) mg : (0 - 3600) mg : (3 - 20) μL : (1 - 10) ml.

[0008] Further, the preparation process of the above high-temperature phase-transition hydrogel layer is as follows:

[0009] S11: Place N-isopropylacrylamide, persulfamide, polyether pluronic diacrylate, and acrylic acid in deionized water and ultrasonically vibrate until completely dissolved;

[0010] S12: Cool the solution in an ice-water bath not higher than 4°C;

[0011] S13: Add tetramethylethylenediamine to the solution at a temperature not higher than 4°C, mix, and polymerize at room temperature to obtain the high-temperature phase-transition hydrogel layer.

[0012] Further, the above polymerization temperature is 0°C - 25°C, and the polymerization time is not less than 1 h.

[0013] Further, the above low-temperature phase-transition hydrogel layer is polymerized from N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and deionized water under ultraviolet light irradiation conditions; the volume-mass ratio of N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and deionized water is: 500 mg : (0 - 2000) mg : (3 - 30) mg : (1 - 10) ml.

[0014] Further, the preparation process of the above low-temperature phase-transition hydrogel layer is as follows:

[0015] S21: Place N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, and 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone in deionized water and ultrasonically vibrate until completely dissolved;

[0016] S22: Polymerize the solution under ultraviolet light irradiation conditions to obtain the low-temperature phase-transition hydrogel layer.

[0017] Further, the above light intensity is not less than 15 mw / cm 2 , and the polymerization time is 10 min - 60 min.

[0018] Furthermore, the bonding time of the above-mentioned high-temperature phase-transition hydrogel layer and the low-temperature phase-transition hydrogel layer is not less than 1 h; the high-temperature threshold is 30°C - 52°C; the low-temperature threshold is 0°C - 17°C.

[0019] A high-low temperature dual-control energy-saving intelligent window includes: an upper glass, a lower glass, an annular gasket, and the above-mentioned composite hydrogel; the annular gasket is located between the upper glass and the lower glass and near the edges of the upper glass and the lower glass; the composite hydrogel is located between the upper glass and the lower glass and the composite hydrogel is located inside the annular gasket.

[0020] A manufacturing method of the above-mentioned high-low temperature dual-control energy-saving intelligent window includes the following steps:

[0021] S1: Place a first intermediate gasket between the upper glass and the first intermediate glass. The first intermediate gasket is near the edges of the upper glass and the first intermediate glass and the thickness of the first intermediate gasket is half of the thickness of the annular gasket;

[0022] S2: Prepare a high-temperature phase-transition hydrogel layer inside the first intermediate gasket;

[0023] S3: Place a second intermediate gasket between the lower glass and the second intermediate glass. The second intermediate gasket is near the edges of the lower glass and the second intermediate glass and the thickness of the second intermediate gasket is half of the thickness of the annular gasket;

[0024] S4: Prepare a low-temperature phase-transition hydrogel layer inside the second intermediate gasket;

[0025] S5: Take out the first intermediate glass, the first intermediate gasket, the second intermediate glass and the second intermediate gasket, and then bond the annular gasket between the upper glass and the lower glass, so that the high-temperature phase-transition hydrogel layer and the low-temperature phase-transition hydrogel layer are located between the annular gaskets and the high-temperature phase-transition hydrogel layer is bonded to the low-temperature phase-transition hydrogel layer;

[0026] S6: Fix the upper glass and the lower glass, and make the bonding time of the high-temperature phase-transition hydrogel layer and the low-temperature phase-transition hydrogel layer not less than 1 h to obtain a high-low temperature dual-control energy-saving intelligent window.

[0027] The present invention has the following beneficial effects:

[0028] (1) The composite hydrogel of the present invention includes a high-temperature phase-transition hydrogel layer and a low-temperature phase-transition hydrogel layer that are attached to each other. The high-temperature phase-transition hydrogel layer has the function of changing color at a high-temperature threshold, and the low-temperature phase-transition hydrogel layer has the function of changing color at a low-temperature threshold. Specifically, when the ambient temperature is higher than the high-temperature threshold, the high-temperature phase-transition hydrogel layer is in an opaque state; when the ambient temperature is lower than the low-temperature threshold, the low-temperature phase-transition hydrogel layer is in an opaque state; when the ambient temperature is between the low-temperature threshold and the high-temperature threshold, both the high-temperature phase-transition hydrogel layer and the low-temperature phase-transition hydrogel layer are in a transparent state. Therefore, this composite hydrogel layer can reduce the light transmittance under specific temperature conditions, reduce the heat transfer, and achieve the purpose of energy conservation and emission reduction.

[0029] (2) The intelligent window manufactured based on the composite hydrogel of the present invention has the function of dual regulation of high and low temperatures, that is, the transparency can be changed when the temperature is too high or too low. When the accumulated external heat on the intelligent window causes the temperature of the glass to be higher than the high-temperature threshold, the intelligent window changes from transparent to opaque, thereby reducing the light transmittance, reflecting the light source and heat source into the room, isolating the heat transferred from the outside to the inside, and thus saving the energy for indoor cooling and achieving energy conservation and emission reduction. When the external environmental temperature is low, causing the temperature of the glass to be lower than the low-temperature threshold, the intelligent window changes from transparent to opaque, reducing the heat transfer from the room to the outside. At the same time, the indoor heat can also be reflected back into the room, reducing the heat loss, thereby reducing the energy for indoor heating and achieving the purpose of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the composite hydrogel of the present invention;

[0031] Figure 2 is an exploded structural diagram of the high-low temperature dual-control energy-saving intelligent window of the present invention;

[0032] Figure 3 is a schematic preparation structural diagram of the high-temperature phase-transition hydrogel layer of the present invention;

[0033] Figure 4 is a schematic preparation structural diagram of the low-temperature phase-transition hydrogel layer of the present invention;

[0034] Figure 5 is a schematic structural diagram of the high-low temperature dual-control energy-saving intelligent window of the present invention during energy-saving measurement;

[0035] Figure 6 is an effect diagram of the high-low temperature dual-control energy-saving intelligent window of the present invention during heating and cooling;

[0036] Figure 7 is an effect diagram of the high-low temperature dual-control energy-saving intelligent window of the present invention during cooling and heating;

[0037] Figure 8 This is the energy consumption comparison chart of the high-low temperature dual-control energy-saving intelligent window of the present invention during the heating process;

[0038] Figure 9 This is the energy consumption comparison chart of the high-low temperature dual-control energy-saving intelligent window of the present invention during the cooling process.

[0039] In the figure: 10 - composite hydrogel; 11 - high-temperature phase-change hydrogel layer; 12 - low-temperature phase-change hydrogel layer; 21 - upper glass; 22 - lower glass; 23 - annular gasket; 24 - first intermediate glass; 25 - first intermediate gasket; 26 - second intermediate glass; 27 - second intermediate gasket; 300 - energy-saving measurement device; 301 - reference pattern; 302 - high-low temperature dual-control energy-saving intelligent window; 303 - sliding groove. Detailed implementation manners

[0040] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0041] Example 1:

[0042] This example provides a high-temperature phase-change hydrogel layer, which is polymerized from N-isopropylacrylamide, persulfamide (initiator), polyether pluronic diacrylate (polymer cross-linking agent), acrylic acid, tetramethylethylenediamine (catalyst) and deionized water under a low-temperature environment. The volume mass ratio of N-isopropylacrylamide, persulfamide, polyether pluronic diacrylate, acrylic acid, tetramethylethylenediamine and deionized water is: 400 mg : (10 - 80) mg : (10 - 100) mg : (0 - 3600) mg : (3 - 20) μL : (1 - 10) ml.

[0043] The preparation process of the high-temperature phase-change hydrogel layer is as follows:

[0044] S11: Place N-isopropylacrylamide, persulfamide, polyether pluronic diacrylate and acrylic acid in deionized water, and ultrasonically vibrate until completely dissolved;

[0045] S12: Place the solution in an ice-water bath not higher than 4°C to cool down;

[0046] S13: Add tetramethylethylenediamine to the solution at a temperature not higher than 4°C, mix and polymerize at room temperature to obtain the high-temperature phase-change hydrogel layer. The polymerization temperature is 0°C - 25°C, the polymerization time is not less than 1 h, and the transition temperature (i.e., the high-temperature threshold) of the high-temperature phase-change hydrogel layer is shown in Table 1.

[0047] Table 1 Transition temperatures of the high-temperature phase-transition hydrogel layer under different ratios

[0048]

[0049] It can be seen that the transition temperature of the high-temperature phase-transition hydrogel layer is mainly related to the weight ratio of N-isopropylacrylamide and acrylic acid. Therefore, the transition temperature of the high-temperature phase-transition hydrogel layer can be changed by adjusting the weight ratio of N-isopropylacrylamide and acrylic acid. The adjustment range of the transition temperature is 30°C - 52°C, so as to adapt to different temperature conditions.

[0050] Example 2:

[0051] This example provides a low-temperature phase-transition hydrogel layer, which is polymerized from N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone and deionized water under ultraviolet light irradiation. The volume-mass ratio of N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (photoinitiator) and deionized water is: 500 mg : (0 - 2000) mg : (3 - 30) mg : (1 - 10) ml.

[0052] The preparation process of the low-temperature phase-transition hydrogel layer is as follows:

[0053] S21: Place N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone in deionized water, and ultrasonically vibrate until completely dissolved;

[0054] S22: Polymerize the solution under ultraviolet light irradiation to obtain a low-temperature phase-transition hydrogel layer. The light intensity is not less than 15 mw / cm 2 , and the polymerization time is 10 min - 60 min. The transition temperature (i.e., the low-temperature threshold) of the low-temperature phase-transition hydrogel layer is shown in Table 2.

[0055] Table 2 Transition temperatures of the low-temperature phase-transition hydrogel layer under different ratios

[0056]

[0057] It can be seen that the transition temperature of the low-temperature phase-transition hydrogel layer is mainly related to the weight ratio of N-(2-amino-2-oxoethyl)acrylamide and acrylic acid. The transition temperature of the low-temperature phase-transition hydrogel layer can be changed by adjusting the weight ratio of N-(2-amino-2-oxoethyl)acrylamide and acrylic acid. The adjustment range of the transition temperature is 0°C - 17°C, so as to adapt to different temperature conditions.

[0058] Example 3:

[0059] Please refer to Figure 1 , this embodiment provides a composite hydrogel 10, which includes the high-temperature phase-transition hydrogel layer 11 of Embodiment 1 and the low-temperature phase-transition hydrogel layer 12 of Embodiment 2. The high-temperature phase-transition hydrogel layer 11 and the low-temperature phase-transition hydrogel layer 12 are naturally attached together. Due to the viscosity of the high-temperature phase-transition hydrogel layer 11 and the low-temperature phase-transition hydrogel layer 12, after being attached for a period of time, the high-temperature phase-transition hydrogel layer 11 and the low-temperature phase-transition hydrogel layer 12 are bonded together to form a composite hydrogel.

[0060] The composite hydrogel 10 of this embodiment has the function of color change at two different temperatures. Specifically, when the temperature is higher than the high-temperature threshold (the transition temperature of the high-temperature phase-transition hydrogel layer 11), the high-temperature phase-transition hydrogel layer 11 is in an opaque state. When the temperature is lower than the high-temperature threshold, the high-temperature phase-transition hydrogel layer 11 is in a transparent state. When the temperature is lower than the low-temperature threshold (the transition temperature of the low-temperature phase-transition hydrogel layer 12), the low-temperature phase-transition hydrogel layer 12 is in an opaque state. When the temperature is higher than the low-temperature threshold, the low-temperature phase-transition hydrogel layer 12 is in a transparent state. Therefore, the composite hydrogel layer of this embodiment can reduce the light transmittance under specific temperature conditions, reduce the heat transfer, and achieve the purpose of energy conservation and emission reduction.

[0061] Embodiment 4:

[0062] Please refer to Figure 2 , this embodiment provides a high-low temperature dual-control energy-saving intelligent window, including: an upper glass 21, a lower glass 22, an annular gasket 23, and the composite hydrogel 10 of Embodiment 3. The upper glass 21 and the lower glass 22 are arranged opposite to each other. The annular gasket 23 is located between the upper glass 21 and the lower glass 22 and close to the edges of the upper glass 21 and the lower glass 22. The connection manner between the annular gasket 23 and the upper glass 21 and the lower glass 22 is preferably bonding. The composite hydrogel 10 is located between the upper glass 21 and the lower glass 22 and the composite hydrogel 10 is located inside the annular gasket 23. At the same time, the composite hydrogel 10 fills the space formed by the annular gasket 23, the upper glass 21, and the lower glass 22. In this embodiment, the material of the annular gasket 23 is silicone rubber.

[0063] The intelligent window manufactured based on the composite hydrogel of the present invention has the function of dual regulation of high and low temperatures, that is, the transparency can be changed when the temperature is too high or too low. When the accumulated external heat on the intelligent window causes the temperature of the glass to be higher than the high temperature threshold, the intelligent window changes from transparent to opaque, thereby reducing the light transmittance, reflecting the light source and heat source into the room, isolating the heat transferred from the outside to the inside, and then saving the energy for indoor cooling and achieving energy conservation and emission reduction. When the external environmental temperature is low, causing the temperature of the glass to be lower than the low temperature threshold, the intelligent window changes from transparent to opaque, reducing the transfer of indoor heat to the outside. At the same time, the indoor heat can also be reflected back into the room, reducing the heat loss, thereby reducing the energy for indoor heating and achieving the purpose of energy conservation and emission reduction.

[0064] Example 5:

[0065] Please refer to Figure 3 and Figure 4 This embodiment provides a manufacturing method of a high and low temperature dual control energy-saving intelligent window based on Example 4, including the following steps:

[0066] S1: Place the first intermediate gasket 25 between the upper glass 21 and the first intermediate glass 24. The first intermediate gasket 25 is close to the edges of the upper glass 21 and the first intermediate glass 24, and the thickness of the first intermediate gasket 25 is half of the thickness of the annular gasket 23. The upper glass 21 and the first intermediate glass 24 are fixed by means of heavy pressure or winding an elastic band, etc.

[0067] S2: Prepare a high-temperature phase-transition hydrogel layer inside the first intermediate gasket 25. Specifically, inject a solution mixed with N-isopropylacrylamide, thioacetamide (initiator), polyether pluronic diacrylate (macromolecular crosslinking agent), acrylic acid, tetramethylethylenediamine (catalyst) and deionized water solution into the inner space of the first intermediate gasket 25 by injection, and the solution polymerizes inside the first intermediate gasket 25. In this embodiment, the dosages of N-isopropylacrylamide, thioacetamide, polyether pluronic diacrylate, acrylic acid, tetramethylethylenediamine and deionized water are 400 mg, 20 mg, 15 mg, 0 mg, 3.7 μL and 4 ml respectively, and the polymerization time is 12 h.

[0068] S3: Place the second intermediate gasket 27 between the lower glass 22 and the second intermediate glass 26. The second intermediate gasket 27 is close to the edges of the lower glass 22 and the second intermediate glass 26, and the thickness of the second intermediate gasket 27 is half of the thickness of the annular gasket 23. The lower glass 22 and the second intermediate glass 26 are fixed by means of heavy pressure or winding an elastic band, etc.

[0069] S4: Prepare a low-temperature phase transition hydrogel layer inside the second intermediate spacer 27; specifically, inject a solution of N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and deionized water into the inner space of the second intermediate spacer 27 by injection, and the solution polymerizes inside the second intermediate spacer 27. In this embodiment, the dosages of N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and deionized water are: 500 mg: 750 mg: 3.7 mg and 3.75 ml respectively, and the light intensity is 15 mw / cm 2 , and the polymerization time is 20 min.

[0070] S5: Take out the first intermediate glass 24, the first intermediate spacer 25, the second intermediate glass 26, and the second intermediate spacer 27, and then bond an annular spacer 23 between the upper glass 21 and the lower glass 22, so that the high-temperature phase transition hydrogel layer 11 and the low-temperature phase transition hydrogel layer 12 are located between the annular spacers 23, and the high-temperature phase transition hydrogel layer 11 is in contact with the low-temperature phase transition hydrogel layer 12.

[0071] S6: Fix the upper glass 21 and the lower glass 22 by means of heavy pressure or winding an elastic band, etc., so that the contact time of the high-temperature phase transition hydrogel layer 11 and the low-temperature phase transition hydrogel layer 12 is not less than 1 h to obtain a high-low temperature dual-control energy-saving intelligent window.

[0072] In this embodiment, the exhaust structure, assembly method, sealing method, fixing method, etc. that appear in the preparation of the high-low temperature dual-control energy-saving intelligent window all belong to the prior art and will not be elaborated here.

[0073] Example 6:

[0074] Please refer to Figures 5 to 9 , this embodiment provides an energy-saving measurement method for the high-low temperature dual-control energy-saving intelligent window of Embodiment 5, which includes the following steps:

[0075] (1) Install the high-low temperature dual-control energy-saving intelligent window 302 in the sliding groove 303 at the opening of the energy-saving measurement device 300 and seal it. The sealing method can be a sealing method using a sealing strip, etc. A reference pattern 301 is provided on the inner bottom side of the energy-saving measurement device 300, and a temperature sensor is provided inside the energy-saving measurement device 300;

[0076] (2) Apply an external heat source outside the high-low temperature dual-control energy-saving intelligent window 302, and read and record the real-time data by the temperature sensor. Then, turn off the external heat source for natural cooling, and read and record the real-time data by the temperature sensor; as Figure 6As shown, during this process, as the temperature rises, the reference pattern 301 changes from visible to invisible, and as the temperature drops, the reference pattern 301 changes from invisible to visible;

[0077] (3) Apply an external cold source to the outside of the high and low temperature dual - controlled energy - saving intelligent window 302, and let the temperature sensor read and record the real - time data. Then turn off the external cold source for natural heating, and let the temperature sensor read and record the real - time data. As Figure 7 shown, during this process, as the temperature drops, the reference pattern 301 changes from visible to invisible, and as the temperature rises, the reference pattern 301 changes from invisible to visible.

[0078] From Figure 8 it can be seen that the temperature rise of the high and low temperature dual - controlled energy - saving intelligent window 302 is lower than that of the ordinary window after heating for 6 minutes, which is 14°C. From Figure 9 it can be seen that the temperature drop of the high and low temperature dual - controlled energy - saving intelligent window 302 is lower than that of the ordinary window after cooling for 6 minutes, which is 1°C. Thus, it can be seen that the high and low temperature dual - controlled energy - saving intelligent window 302 of this embodiment will change from a transparent state to an opaque state after heating and cooling, thereby reducing heat transfer and saving the energy for refrigeration or heating, thus achieving the purpose of energy conservation and emission reduction.

[0079] The above - mentioned are only the preferred embodiments of the present invention, and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite hydrogel, characterized in that, Comprising: A high-temperature phase-transition hydrogel layer and a low-temperature phase-transition hydrogel layer that are mutually adhered; when the temperature is higher than the high-temperature threshold, the high-temperature phase-transition hydrogel layer is opaque, and when the temperature is lower than the high-temperature threshold, the high-temperature phase-transition hydrogel layer is transparent; when the temperature is lower than the low-temperature threshold, the low-temperature phase-transition hydrogel layer is opaque, and when the temperature is higher than the low-temperature threshold, the low-temperature phase-transition hydrogel layer is transparent.

2. The composite hydrogel according to claim 1, wherein The high-temperature phase-transition hydrogel layer is polymerized from N-isopropylacrylamide, thioacetamide, polyether pluronic diacrylate, acrylic acid, tetramethylethylenediamine, and deionized water under a low-temperature environment; the volume mass ratio of N-isopropylacrylamide, thioacetamide, polyether pluronic diacrylate, tetramethylethylenediamine, and deionized water is: 400 mg : (10 - 80) mg : (10 - 100) mg : (0 - 3600) mg : (3 - 20) μL : (1 - 10) ml.

3. The composite hydrogel according to claim 2, wherein, The preparation process of the high-temperature phase-transition hydrogel layer is as follows: S11: Place N-isopropylacrylamide, thioacetamide, polyether pluronic diacrylate, and acrylic acid in deionized water, and ultrasonically vibrate until completely dissolved; S12: Cool the solution in an ice-water bath not higher than 4°C; S13: Add tetramethylethylenediamine to the solution at a temperature not higher than 4°C, mix, and polymerize at room temperature to obtain the high-temperature phase-transition hydrogel layer.

4. The composite hydrogel according to claim 3, wherein The polymerization temperature is 0°C - 25°C, and the polymerization time is not less than 1 h.

5. The composite hydrogel according to claim 1, wherein, The low-temperature phase-transition hydrogel layer is polymerized from N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and deionized water under ultraviolet light irradiation conditions; the volume mass ratio of N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, and deionized water is: 500 mg : (0 - 2000) mg : (3 - 30) mg : (1 - 10) ml.

6. The composite hydrogel according to claim 5, characterized in that, The preparation process of the low-temperature phase-transition hydrogel layer is as follows: S21: Place N-(2-amino-2-oxoethyl)acrylamide, acrylic acid, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone in deionized water, and ultrasonically vibrate until completely dissolved; S22: Polymerize the solution under ultraviolet light irradiation conditions to obtain the low-temperature phase-transition hydrogel layer.

7. The composite hydrogel according to claim 6, wherein The light intensity is not less than 15 mw / cm 2 , and the polymerization time is 10 min - 60 min.

8. The composite hydrogel according to any one of claims 1 to 7, characterized in that, The adhering time of the high-temperature phase-transition hydrogel layer and the low-temperature phase-transition hydrogel layer is not less than 1 h; the high-temperature threshold is 30°C - 52°C; the low-temperature threshold is 0°C - 17°C.

9. An intelligent window with dual control of high and low temperatures for energy conservation, characterized in that, Comprising: An upper glass, a lower glass, an annular gasket, and the composite hydrogel according to any one of claims 1 to 8; The annular gasket is located between the upper glass and the lower glass and near the edges of the upper glass and the lower glass; the composite hydrogel is located between the upper glass and the lower glass and the composite hydrogel is located inside the annular gasket.

10. A manufacturing method of the high-low temperature dual-control energy-saving intelligent window according to claim 9, characterized in that, Including the following steps: S1: Place the first intermediate spacer between the upper glass and the first intermediate glass. The first intermediate spacer is near the edges of the upper glass and the first intermediate glass, and the thickness of the first intermediate spacer is half of the thickness of the annular spacer. S2: Prepare a high-temperature phase-transition hydrogel layer inside the first intermediate spacer. S3: Place the second intermediate spacer between the lower glass and the second intermediate glass. The second intermediate spacer is near the edges of the lower glass and the second intermediate glass, and the thickness of the second intermediate spacer is half of the thickness of the annular spacer. S4: Prepare a low-temperature phase-transition hydrogel layer inside the second intermediate spacer. S5: Take out the first intermediate glass, the first intermediate spacer, the second intermediate glass and the second intermediate spacer, and then bond the annular spacer between the upper glass and the lower glass, so that the high-temperature phase-transition hydrogel layer and the low-temperature phase-transition hydrogel layer are located between the annular spacers, and the high-temperature phase-transition hydrogel layer is in contact with the low-temperature phase-transition hydrogel layer. S6: Fix the upper glass and the lower glass, and keep the high-temperature phase-transition hydrogel layer and the low-temperature phase-transition hydrogel layer in contact for no less than 1 h to obtain a high-low temperature dual-controlled energy-saving intelligent window.

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