CN115449210A

CN115449210A - High-strength temperature-sensitive color-changing hydrogel light-adjusting glass

Info

Publication number: CN115449210A
Application number: CN202211292001.9A
Authority: CN
Inventors: 李洋
Original assignee: Tianjin Site Glass Co ltd
Current assignee: Tianjin Site Glass Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-09
Also published as: CN115558275A; CN115651388A; CN115521604A; CN115521604B

Abstract

The application is a divisional application with the application number of 2022111677123 and the patent name of 'a high-strength temperature-sensitive allochroic hydrogel'. The application relates to the field of temperature-sensitive color-changing hydrogel dimming glass, and particularly discloses high-strength temperature-sensitive color-changing hydrogel dimming glass. The high-strength temperature-sensitive color-changing hydrogel dimming glass comprises two layers of glass and temperature-sensitive color-changing hydrogel arranged between the two layers of glass, wherein the temperature-sensitive color-changing hydrogel is prepared from the following raw materials: temperature sensitive polymer, gel compound, antifreezing agent, temperature regulator, organic cross-linking agent, infrared absorption functional particles, initiator and the balance of water. In addition, the temperature-sensitive color-changing hydrogel dimming glass prepared by the method has sensitive heat-sensitive performance, high strength and long service life.

Description

High-strength temperature-sensitive color-changing hydrogel light-adjusting glass

The application is a divisional application with the application number of 2022111677123 and the patent name of 'a high-strength temperature-sensitive allochroic hydrogel'.

Technical Field

The application relates to the field of temperature-sensitive color-changing hydrogel light-adjusting glass, in particular to high-strength temperature-sensitive color-changing hydrogel light-adjusting glass.

Background

In China, building energy consumption accounts for over 27% of total energy consumption, and is increasing at a rate of 1% per year. The statistics of the construction department show that the area of a newly built house in urban and rural construction in China is nearly 20 hundred million square meters every year, wherein more than 80 percent of the buildings are high-energy-consumption buildings; the existing buildings are about 400 hundred million square meters, and more than 95 percent of the buildings are high-energy-consumption buildings. The proportion of building energy consumption to total national energy consumption is rapidly increased from 27.6 percent to more than 33 percent at present. The new buildings in China are basically designed according to the energy-saving standard, the proportion is as high as 95.7 percent, and the proportion of the energy-saving design standard executed in the construction stage is only 53.8 percent.

The energy-saving glass building materials include electric control dimming glass, temperature control dimming glass, light control dimming glass and the like. The temperature control dimming glass is also named as thermotropic dimming glass, and is a glass system which is applied to building curtain walls and has a sun-shading function. When sunlight irradiates the temperature control dimming glass, the sunlight heats the glass, and the dimming glass gradually atomizes after the temperature reaches the set temperature, so that the sun shading function is realized. When the sunlight becomes weak, the temperature of the temperature control dimming glass is reduced, and the glass is restored to a transparent state, which is the same as that of common glass. The process is repeatedly reversible, and no external energy is needed, and no special person is needed for management. In the prior art, a great deal of research is carried out on the temperature control glass gel, for example, documents report that poly-N-isopropylacrylamide temperature-sensitive gel has higher temperature sensitivity but insufficient weather resistance, and cannot generate a sun-shading effect under the condition that the environment temperature is lower than the response temperature of a temperature-sensitive material but the burning sensation of sunlight is strong. In order to solve the above problems, researchers have found that a temperature-sensitive polymer, such as polyvinyl acetal gel, which responds at a specific temperature can be realized by introducing a hydrophobic group to the molecular chain of polyvinyl alcohol to change the water-soluble property of polyvinyl alcohol.

Because the temperature control dimming glass has a sun-shading function, other internal and external sun-shading measures are not required to be additionally added, so that the vertical surface and the top surface of the building are really simple and transparent, the space is saved, the building is rich in aesthetic feeling and modern sense, more possibilities are created for the design of modern buildings, and wide application requirements are brought, for example, future buildings of Shenzhen Ke institute of medicine, museum of Kunming country plants, bridge sightseeing elevators of Chongqing Dongmi, and the like. These requirements are certainly not sufficient to achieve the technical effects of temperature-sensitive and energy-saving, but require longer service lives, which include the recoverability of the temperature-sensitive material and the mechanical properties of the glass structure. Otherwise, frequent iterative updates generate a lot of non-recyclable garbage, which causes environmental pollution, and the cost for replacing glass of the building is also very considerable.

Disclosure of Invention

The high-strength temperature-sensitive color-changing hydrogel is also called a temperature-sensitive gel system or temperature-sensitive gel, and is a composition of all compounds for preparing temperature-sensitive color-changing hydrogel light control glass, which is formed by temperature-sensitive polymeric materials, gel compounds and other auxiliary agents.

The gel compound is a compound which influences the network structure of the gel and contains carboxyl, hydroxyl and amino, water and an ionic crosslinking agent, and does not contain an initiator and an organic crosslinking agent.

The temperature-sensitive polymer is also called as a temperature-sensitive polymeric material, and is specifically a triblock polymer formed by polyoxyethylene and polyoxypropylene or polyoxyethylene and polyoxybutylene, the molecular weight of the triblock polymer is 1000-8500, the HLB value of the triblock polymer is 3-30, and both ends of the triblock polymer are polyoxyethylene.

The product temperature control precision is called sensitivity, and the specific detection method is a product temperature control precision detection method.

In order to solve the problems, the application provides the temperature-sensitive color-changing hydrogel dimming glass with high strength, long service life and high sensitivity and precision of +/-1 ℃ and the preparation method thereof.

In a first aspect, the application provides a high-strength, long-life, temperature-sensitive, color-changing hydrogel light control glass, which adopts the following technical scheme:

a high-strength temperature-sensitive color-changing hydrogel is prepared from the following raw materials: 0.5-15wt% of temperature-sensitive polymer, 5-15wt% of gel compound, 5-30wt% of antifreezing agent, 0.1-1wt% of temperature regulator, 0.01-0.2wt% of organic cross-linking agent, 0.01-0.1wt% of infrared absorption functional particles, 0.01-0.5wt% of initiator and the balance of water,

the temperature-sensitive polymeric material is a triblock polymer formed by polyoxyethylene and polyoxypropylene or polyoxyethylene and polyoxybutylene, the molecular weight of the triblock polymer is 1000-8500, the HLB value of the triblock polymer is 3-30, and both ends of the triblock polymer are polyoxyethylene;

the gel compound consists of A, B and three components C:

the component A is agar or chitosan;

the component B is sodium carboxymethyl cellulose or acrylic acid or a mixture of the sodium carboxymethyl cellulose and the acrylic acid;

the component C is acrylamide monomer or polyacrylamide or gelatin, and when the component B is acrylic acid, the component C is not acrylamide monomer;

the other components are water and an ionic crosslinking agent;

the ionic crosslinking agent is Fe dissolved in water ³⁺ Salt or Ca ²⁺ And (3) salt.

By adopting the technical scheme, the hydrogel generally forms a network structure of the hydrogel through chemical crosslinking, physical crosslinking and chemical physical crosslinking. Chemically crosslinked hydrogels refer to permanent and irreversible network structures formed by chemical crosslinking, such as covalent or ionic crosslinking, which have high strength and toughness but cannot be repaired once damaged. And physically crosslinked hydrogels are bonded to the crosslinked polymer network by van der waals forces, electrostatic interactions, hydrogen bonding, hydrophobic associations, or combinations of these interactions between molecular chains. The physical crosslinked network has reversibility under certain conditions, and can make the hydrogel have self-recovery function, plastic function and the like.

The gel compound contains three groups of-OH, -NH2 and-COOH, more specifically, the carboxyl-containing sodium carboxymethyl cellulose or acrylic acid, the amino-containing polyacrylamide or other amide-type high-molecular polymers capable of forming amide bonds with carboxyl, such as Acrylamide (AM) monomer or polyacrylamide or gelatin, and the hydroxyl-containing agar or chitosan. The carboxyl and the hydroxyl can form ester, and can also form amide with amino, namely three gel compounds form chemical crosslinking of ester or amide through covalent bond, the gel system also contains iron ions and/or calcium ions, so as to form chemical crosslinking of ion complexation, meanwhile, the high-strength temperature-sensitive color-changing hydrogel system also contains Fade Hua Li, electrostatic interaction, hydrogen bond interaction (such as NH2-OH or OH-OH hydrogen bond), hydrophobic association, electrostatic interaction or the combination of the interactions, and stronger entanglement of molecular chains is generated, so that the gel prepared by the method has certain strength and toughness, and also has plastic function and self-recovery function, thereby prolonging the service life of the temperature-sensitive color-changing hydrogel light-adjusting glass; the technical effect of adopting the carboxymethyl cellulose is better than that of sodium alginate, particularly, the carboxymethyl cellulose is artificially modified cellulose, and the introduction amount of carboxymethyl is convenient to control. Most importantly, compared with sodium alginate, carboxymethyl cellulose of different manufacturers has no influence on the quality stability of the high-strength temperature-sensitive color-changing hydrogel, but different sodium alginates cannot ensure the quality stability of the final temperature-sensitive color-changing hydrogel, possibly due to different reactions of the impurity content of the sodium alginate of different manufacturers or slight difference (such as carboxyl content difference) of the sodium alginate per se on the system. Meanwhile, the gel compound also comprises agar or chitosan, so that more intramolecular cross-links are formed by carboxyl groups, namely hydroxyl groups of the agar or the hydroxyl groups or the amino groups of the chitosan are cross-linked, carboxyl groups and hydroxyl groups in carboxymethyl cellulose molecules are relatively less cross-linked, and an amide bond, an ester bond, a hydrogen bond and other staggered network structures are formed, so that the chain length is prolonged, and the ionic cross-linking points are increased, thereby the strength and the toughness of the hydrogel are increased, and the service life of the thermochromic hydrogel is further prolonged;

in addition, the temperature-sensitive polymeric material in the application can be more freely stretched and contracted along with the temperature change in the hydrogel network structure, and finally the temperature control precision of the product is shown in the temperature control precision of the product in the prior art, wherein the temperature control precision of the product in the prior art is +/-2 ℃ or higher, and the temperature control precision of the temperature-sensitive allochroic hydrogel light-adjusting glass in the application is +/-1 ℃. The reason for this is probably because, on the one hand, molecular chains in the temperature-sensitive color-changing hydrogel system are not only entangled with each other but also mutually exclusive, and a cavity with a certain aperture is formed due to the intermolecular exclusion, so that the temperature-sensitive material is more freely deformed. On the other hand, the temperature-sensitive polymeric material is dissolved in the water of the temperature-sensitive allochroic hydrogel, and is dispersed and dissolved in the water when the temperature is lower, and is collected and separated out when the temperature is higher, so that the temperature control precision is high.

Preferably, the polymerization degree of the sodium carboxymethyl cellulose is 200-300, the etherification degree is 0.6-0.7, and 2-3mmol of carboxymethyl is introduced into per 1g of dry weight of cellulose on average.

By adopting the technical scheme, 2-3mmol of carboxymethyl is introduced into 1g of dry weight of cellulose, so that the solubility of carboxymethyl cellulose is better.

Preferably, the ionic crosslinking agent contains Ca ²⁺ A salt.

By adopting the technical scheme, when the gel compound adopts carboxymethyl cellulose, calcium ions are preferentially selected as the ionic crosslinking agent. Same Fe ³⁺ Compared with the temperature-sensitive color-changing hydrogel light-adjusting glass prepared by taking calcium ions as an ionic cross-linking agent, the temperature control precision is higher, probably because Ca ²⁺ The network gel has larger mesh aperture, and is more favorable for the temperature-sensitive polymerization to freely stretch along with the temperature change when the chain length of the temperature-sensitive polymerization is longer.

Preferably, the mass ratio of the component A, the component B and the component C is (0.1-0.5): (0.2-2): (1-5).

By adopting the technical scheme, within the mass ratio range, the crosslinking conditions of various components are good, the strength, toughness, sensitivity and heat gain coefficient of the prepared temperature-sensitive allochroic hydrogel can achieve the optimal effect, and the specific expression is that no broken glass appears in 5 groups of experiments, the sensitivity is +/-1 ℃, the heat gain coefficient is not higher than 0.12, and the service life is more than 35 years.

Preferably, the pH value of the high-strength temperature-sensitive color-changing hydrogel is 6-8.

Preferably, the use temperature of the high-strength temperature-sensitive color-changing hydrogel is-20 ℃ to 80 ℃.

Preferably, the polyacrylamide has an average molecular weight of 50 to 100 ten thousand; the average molecular weight of the gelatin is 5-7 ten thousand; the average molecular weight of the agar is 10-15 ten thousand; the average molecular weight of the chitosan is 3-5 ten thousand.

By adopting the technical scheme, the molecular weight of the gel compound formed by the compound with the average molecular weight is proper, the molecular weight of the gel compound is too large, the strength and the toughness of the prepared temperature-sensitive allochroic hydrogel are strong, but the sensitivity is reduced, the molecular weight of the gel compound is too small, and the strength and the toughness of the prepared temperature-sensitive allochroic hydrogel are insufficient. This is probably because when the molecular weight of the gel compound is too large, the crosslinked state is more dense, resulting in an excessively small pore size of the lattice structure, and conversely, when the molecular weight of the gel compound is too small, the number of network crosslinks is too small, resulting in a decrease in strength or toughness.

In a second aspect, the application provides a high-strength temperature-sensitive color-changing hydrogel light-adjusting glass with high strength and long service life, which adopts the following technical scheme:

the coefficient of heat gain of the temperature-sensitive color-changing hydrogel light-adjusting glass prepared from the temperature-sensitive color-changing hydrogel is less than or equal to 0.12.

Preferably, the heat coefficient is 0.108 or more.

Preferably, the service life of the temperature-sensitive color-changing hydrogel light-adjusting glass is as long as 35 years.

In a third aspect, the application provides a preparation method of high-strength temperature-sensitive color-changing hydrogel light-adjusting glass, which adopts the following technical scheme:

a preparation method of high-strength temperature-sensitive color-changing hydrogel dimming glass comprises the following preparation steps:

s1: adding a temperature-sensitive polymer, a gel compound, an antifreezing agent, a temperature regulator, an organic cross-linking agent and infrared absorption functional particles into water for dissolving to obtain a mixed solution A;

s2: adding an initiator into the mixed solution A, and uniformly mixing to obtain a mixed solution B;

s3, adhering adhesive tapes around each two pieces of glass to establish a cavity space and arrange a reserved opening, and then adjusting the distance between each two pieces of glass to be 1.5-2.5cm through pressure;

s4: and (3) the mixed solution B is deeply injected into the glass cavity far away from the reserved opening through a pipeline, the injection flow rate is 2.0-2.5L/min, the reserved opening is sealed, the temperature is heated to 30-70 ℃, and the high-strength temperature-sensitive color-changing hydrogel dimming glass is obtained after 1-1.5 h.

The temperature-sensitive color-changing hydrogel can be poured into the glass cavity to form the temperature-controlled glass through the glue injection process, so that the following technical effects can be achieved:

1. the solar heat gain coefficient SHGC is not higher than 0.12;

2. product temperature control precision: plus or minus 1 ℃;

service life: for more than 35 years.

Preferably, the reserved opening in the step S3 is one and is arranged on the side surface of the temperature-sensitive color-changing hydrogel dimming glass, and the length of the reserved opening is 3.5-6.0cm.

Preferably, in step S4, mixed liquor B is injected through a pipeline to a position 10-30cm far away from the reserved opening.

Preferably, the diameter of the pipe in step S4 is 1.5-2.5cm.

Preferably, the sealing reserved opening in the step S4 is sealed by using a glue sealing method.

When the glass is bent toughened glass, the preferable step S4 is to deeply insert the mixed liquid B into the reserved opening through a pipeline and inject the mixed liquid B into the glass cavity, adjust the glass angle every 3-5 minutes to enable the mixed liquid B to be uniformly distributed, seal the reserved opening, heat the mixed liquid B to 30-70 ℃ and obtain the high-strength temperature-sensitive gel bent glass after 1-1.5 hours.

By adopting the technical scheme, the inventor also unexpectedly discovers that the heat gain coefficient of the dimming glass prepared from the temperature-sensitive color-changing hydrogel is further reduced to 0.108 and is far lower than the approved value of the relevant local standard by 0.18 in the experimental process, and proves that the temperature-sensitive color-changing hydrogel and the glue injection process have the technical effects of keeping the glass structure complete and having better environment-friendly and energy-saving effects.

In summary, the present application has the following beneficial effects:

1. the gel compound simultaneously contains three groups of-OH, -NH2 and-COOH, carboxyl and hydroxyl can form ester and can also form amide with amino, namely the three gel compounds form chemical crosslinking of ester or amide through covalent bonds, the gel system also contains iron ions and/or calcium ions, so that chemical crosslinking of ion complexation is formed, and meanwhile, van der Waals force, electrostatic interaction, hydrogen bond interaction (such as NH2-OH or OH-OH hydrogen bond), hydrophobic association, electrostatic interaction or combination of the interactions also exist in the temperature-sensitive color-changing hydrogel system, so that stronger entanglement of molecular chains is generated, and therefore, the gel prepared by the method has certain strength and toughness, and also has a plastic function and a self-recovery function, so that the service life of the temperature-sensitive color-changing hydrogel dimming glass is prolonged;

2. the technical effect of adopting the carboxymethyl cellulose is better, and the carboxymethyl cellulose is matched with the agar or the chitosan, so that more sufficient and stable intramolecular cross-links are formed by carboxyl, namely, hydroxyl of the agar is cross-linked with hydroxyl or amino of the chitosan, carboxyl and hydroxyl cross-links in carboxymethyl cellulose molecules are relatively less, an amide bond, an ester bond, a hydrogen bond and other staggered network structures are formed, the chain length is prolonged, and an ionic cross-linking point is increased, so that the strength and the toughness of the hydrogel are improved, and the service life of the temperature-sensitive color-changing hydrogel dimming glass is further prolonged.

3. The temperature-sensitive polymeric material in the hydrogel network structure can stretch and contract more freely along with the temperature change, and is finally reflected in the temperature control precision of a product, the temperature control precision of the product in the prior art is +/-2 ℃ or higher, and the temperature control precision of the temperature-sensitive allochroic hydrogel light-adjusting glass is +/-1 ℃; the heat coefficient of the temperature-sensitive photochromic hydrogel prepared by the temperature-sensitive photochromic hydrogel is not more than 0.12, and the heat coefficient obtained by the improved glue injection process is further reduced to 0.108, which is far lower than the approved value of the relevant local standard of 0.18, so that the temperature-sensitive photochromic hydrogel and the glue injection process thereof can improve the sun-shading effect of the existing temperature-sensitive photochromic hydrogel.

Drawings

FIG. 1 is a flow chart of the process for laminating the temperature-sensitive color-changing hydrogel light control glass according to the present application;

FIG. 2 is a flow chart of the process for light-bending glass laminating of the temperature-sensitive color-changing hydrogel.

Detailed Description

Performance detection test: each detection index is provided with 5 groups of experiments, and each group of experiments is provided with 6 glass experiments.

1. The heat gain coefficient is detected by a GB50189-20152.0.4 Solar Heat Gain Coefficient (SHGC) detection method.

2. The durability detection method comprises the following steps:

2.1 color change cycle durability: the temperature control dimming glass is kept for 5 minutes in an environment with the temperature of not higher than 25 ℃, then the sample is placed in a drying oven with the temperature of 65 ℃ and kept for 5 minutes, after the circulation is carried out for more than 3000 times, the sample is placed in an environment with the temperature of 23 +/-2 ℃ for 24 hours, and then observation is carried out, the sample cannot generate bubbles, blooms and the like, the change value of the visible light transmittance before and after the experiment is less than or equal to 3%, and the change value of the sun shading coefficient is less than or equal to 0.05. If the test sample is circulated 3000 times, the test sample can not generate bubbles, bloom and other phenomena, the change value of the visible light transmittance before and after the test is less than or equal to 3%, and the change value of the shading coefficient is less than or equal to 0.05, the service life is defined as 15 years, if the test sample is circulated 4000 times, the test sample can not generate bubbles, bloom and other phenomena, the change value of the visible light transmittance before and after the test is less than or equal to 3%, and the change value of the shading coefficient is less than or equal to 0.05, the service life is 20 years, and so on, if the test sample is circulated 7000 times, the test sample can not generate bubbles, bloom and other phenomena, the change value of the visible light transmittance before and after the test is less than or equal to 3%, and the change value of the shading coefficient is less than or equal to 0.05, and the service life is 35 years.

2.2 high temperature high humidity durability: the temperature control dimming glass is placed in an environment with the temperature of 85 ℃ and the humidity of 85% for preventing 2500 hours, and then is placed in an environment with the temperature of 23 +/-2 ℃ for 24 hours, and then observation is carried out, so that the phenomena of bubbles, flowering and the like cannot be generated on a sample, the change value of the visible light transmittance before and after the experiment is less than or equal to 3%, and the change value of the shading coefficient is less than or equal to 0.05.

3. The product temperature control precision detection method comprises the following steps: the detection method adopted by the application comprises the following steps: and (3) placing the temperature control dimming glass in an oven with a set temperature, and carrying out visible light transmittance test after heat preservation of each temperature point for 30min (the temperature of the product reaches the set temperature of the oven). The difference value Delta T of the visible light transmittance measured by two adjacent temperature points with the difference of 1 DEG C _{Transparent film} As a criterion, Δ T _{Penetrate through} ＝T2 _{Penetrate through} -T1 _{Transparent film} Wherein T2 _{Transparent film} The visible light transmittance measured at the temperature point T2; t1 _{Transparent film} The visible light transmittance measured at the temperature point T1; when Δ T _{Penetrate through} And when the temperature is more than or equal to 5 percent, judging the T2 as the color-changing temperature point. When T2-T1=1 ℃, the temperature control precision of the product is +/-1 ℃.

4. Detection indexes of the glue-pouring glass are as follows: the adhesive for bonding the glass and the supporting material is smooth and free from adhesive seepage and overflow. No air bubble with the diameter larger than 1.5mm is generated after glue filling.

5. Method for detecting mechanical strength and toughness

Falling ball impact peeling performance test: 5 groups of experiments are set, 6 glass tests are set in each group of experiments, the glass tests are detected according to the method of GB 15763.3-20097.11, and finally the number of broken glass blocks is calculated according to GB15763.3-20096.10 and 8.3.5, the number of broken glass blocks and the number of broken glass blocks are counted, wherein the broken glass blocks are broken, the middle layer is broken, and the middle layer is exposed due to chip stripping.

All the gel preparation lists listed in the application are considered as variant components, and for the sake of clarity and brief description of the inventive process of the application, the components common to the various preparations are described in the manner stated. In addition, in all gel preparation examples, after a gel system and a temperature-sensitive polymer are mixed, the mechanical strength, sensitivity, haze, transparency, heat gain coefficient and the like of the temperature-sensitive color-changing hydrogel dimming glass prepared by different preparation methods are detected and investigated according to the detection method and standard of the temperature-sensitive glass at the temperature of-20-80 ℃. The application also simultaneously investigates the influence of different pH values on the temperature-sensitive gel system with the same components. The present application only lists the beneficial effects different from the prior art, and the examination items which are not different from the prior art are omitted for the sake of clarity and brief description of the process and effects of the present invention.

When all the preparations in this application are used as test samples, at least 5 groups are set for each preparation under each test condition for a statistical analysis.

The technical solution of the present application will be further described in detail with reference to specific embodiments.

Example 1 investigation of the effect of carboxyl groups on the gel system:

example 1 was prepared from preparations 1.A, 1.B and 1.C, respectively, using a gel compound.

All the gel compounds and the content ratios thereof are shown in preparation examples 1A-1C, and mainly several common carboxyl-containing carboxymethyl celluloses, acrylic acid and sodium alginate are considered.

Preparation examples 1.A1 to 1.A4

The component A is agar, the component B is sodium carboxymethylcellulose, the component C is polyacrylamide, the ionic cross-linking agent is ferric sulfate and water to prepare a gel compound, and the components A, B and C, the cross-linking agent and water are proportioned according to the following table 1A:

TABLE 1 component ratios of gel Compounds

Preparation examples 1.B1-1.B4

Different from preparation 1.A, component B is sodium alginate, and the compounding ratio is specifically as shown in table 1B:

TABLE 1B composition ratios of gel compounds

Preparation examples 1.C1 to 1.C4

Different from preparation 1.A, component B is acrylic acid, specifically in the following ratio in table 1C:

TABLE 1C component ratios of gel Compounds

Example 1A preparation of a high-strength temperature-sensitive color-changing hydrogel privacy glass comprises the following steps:

s1: adding 0.5kg of temperature-sensitive polymer, 5kg of gel compound, 5kg of antifreezing agent, 0.1kg of temperature regulator, 0.01kg of organic cross-linking agent and 0.01kg of infrared absorption functional particles into 89.37kg of water for dissolving to obtain a mixed solution A;

s2: adding 0.01kg of initiator into the mixed solution, and uniformly mixing to obtain a mixed solution B;

s3: adhering adhesive tapes around each two pieces of glass to establish a cavity space and arranging 2 reserved openings, wherein the length of each reserved opening is 3.5-6.0cm, and the smaller the glass is, the smaller the reserved opening is, and then adjusting the distance between the glass pieces to be 1.5-2.5cm through pressure;

s4: before the mixed liquid B is injected into the glass cavity, the liquid injection pipe is deeply inserted to a position which is 10cm-30cm far away from the reserved opening, the specific test is carried out on the glass size, the smaller the glass is, the shorter the penetration distance is, the pipe diameter of the peristaltic pump is 1.5cm, the speed and the flow rate of the peristaltic pump are adjusted to be 2.0L/min, the mixed liquid B is injected into the glass cavity, the reserved opening is sealed in a plug mode, and the high-strength temperature-sensitive color-changing hydrogel dimming glass is obtained after heating for 1h at the temperature of 30 ℃.

Wherein the temperature-sensitive polymeric material is a triblock polymer formed by polyoxyethylene and polyoxypropylene, the molecular weight of the triblock polymer is between 1000 and 8500, the HLB value of the triblock polymer is between 3 and 30, and both ends of the triblock polymer are polyoxyethylene;

in the application document, the polymerization degree of the sodium polycarboxymethyl cellulose is 200-300, the etherification degree is 0.6-0.7, 2-3mmol of carboxymethyl is introduced into cellulose per 1g of dry weight on average, the average molecular weight of polyacrylamide is 50-100 ten thousand, the average molecular weight of gelatin is 5-7 ten thousand, the average molecular weight of agar is 10-15 ten thousand, and the average molecular weight of chitosan is 3-5 ten thousand;

the antifreezing agent is ethylene glycol; the temperature regulator is sodium dodecyl sulfate, and the organic cross-linking agent is N, N ' -methylene bisacrylamide and N, N, N ', N ' -tetramethyl ethylenediamine; the infrared absorption functional particles are vanadium dioxide; the initiator is sodium bisulfite, potassium bisulfite and ammonium persulfate;

in the range of-20 ℃ to 80 ℃, the temperature-sensitive allochroic hydrogel light-regulating glass prepared in preparation examples 1.A, 1.B and 1.C has no significant difference in heat gain coefficient groups and between groups, and the average heat gain coefficient is 0.114; the temperature control precision of the product does not have significant difference between groups, and the temperature control precision of the product is +/-1 ℃; when the cycle times of the color-changing cycle durability experiment reach 7000 times, the sample does not generate bubbles, blossoming and other phenomena, the change value of the visible light transmittance before and after the experiment is less than or equal to 3 percent, and the change value of the shading coefficient is less than or equal to 0.05; in the experimental detection process of mechanical strength and toughness, two batches of sodium alginate from different sources are unexpectedly found to have significant difference, and the specific expression is that one group of the preparation example 1.B is broken in a ball drop test, then the two batches of sodium alginate are respectively adopted to carry out repeated verification at the temperature of 0 ℃, 25 ℃ and 40 ℃ according to four mixture ratios of the preparation example 1.B, and similar results are obtained, and the conclusion is probably caused by different reactions of the system due to the impurity content of the sodium alginate of different manufacturers or slight difference (such as carboxyl content difference) of the sodium alginate. Therefore, in order to ensure the stability of the mechanical strength of the temperature-sensitive gel, sodium carboxymethyl cellulose and acrylic acid are preferably used as donors of carboxyl.

The embodiment 1B is different from the embodiment 1A in that 1 reserved opening is arranged in the step S3 and is arranged on the side surface of the temperature-sensitive color-changing hydrogel light-adjusting glass, and the reserved opening is sealed in a glue sealing manner. In the range of-20 ℃ to 80 ℃, the heat gain coefficients of the temperature-sensitive allochroic hydrogel light-regulating glass prepared by the preparation examples 1.A, 1.B and 1.C are respectively in 1.A, 1.B and 1.C groups and have no significant difference among the groups, and the average heat gain coefficient is 0.108; compared with the example 1A, the example 1B has significant difference, which is significantly better than the example 1A, and shows that the preparation method has significant influence on the temperature-sensitive effect of the temperature-sensitive color-changing hydrogel dimming glass.

Example 2 the effect of amino groups on temperature sensitive gel systems was mainly examined.

The gel compounds used in example 2 were from preparations 2.A, 2.B, 2.C and 2.D, respectively.

Preparation examples 2.A1 to 2.A4

The component A is agar, the component B is sodium carboxymethylcellulose, the component C is an acrylamide monomer, the components A, B and C, an ionic crosslinking agent and water are used in the following proportion according to the following table 2A:

TABLE 2A component proportions of gel Compounds

Preparation example 2.B1-2.B4

The component A is agar, the component B is acrylic acid, the component C is an acrylamide monomer, and the components A, B and C, the ionic crosslinking agent and the water are proportioned according to the following table 2B:

TABLE 2B component ratios of gel compounds

Preparation examples 2.C1-2.C4

The component A is agar, the component B is acrylic acid, the component C is an acrylamide monomer, a cross-linking agent and water form a gel compound, and the components A, B and C, an ionic cross-linking agent and water are proportioned according to the following dosage in a table 2C:

TABLE 2C composition ratios of gel compounds

Preparation examples 2.D1-2.D4

The component A is agar, the component B is sodium carboxymethylcellulose, the component C is gelatin, and the components A, B and C, the ionic crosslinking agent and the water are proportioned according to the following table 2D:

TABLE 2 component proportions of gel Compounds

The difference between the embodiment 2A and the embodiment 1A is that the dosage of each raw material for preparing the high-strength temperature-sensitive color-changing hydrogel light-adjusting glass is different, and the parameters of S3 are different, specifically:

s1: adding 10kg of temperature-sensitive polymer, 10kg of gel compound, 10kg of antifreezing agent, 0.5kg of temperature regulator, 0.1kg of organic cross-linking agent and 0.05kg of infrared absorption functional particles into 69.35kg of water for dissolving to obtain a mixed solution A;

s2: adding 0.2kg of initiator into the mixed solution, and uniformly mixing to obtain a mixed solution B;

s3: adhering adhesive tapes around each two pieces of glass to establish a cavity space and arranging 2 reserved openings, wherein the diameter of each reserved opening is 3.5-6.0cm, the smaller the glass is, the smaller the reserved opening is, and then adjusting the distance between each piece of glass to be 1.5-2.5cm through pressure;

s4: before the mixed liquid B is injected into the glass cavity, the liquid injection pipe is deeply far away from the reserved opening by about 10cm-30cm, the specific size of the glass is determined, the smaller the glass is, the shorter the deep distance is, the pipe diameter of the peristaltic pump is 2.5cm, the speed and the flow rate of the peristaltic pump are adjusted by 2.5L/min, the mixed liquid B is injected into the glass cavity, the reserved opening is sealed in a plug mode, and the high-strength temperature-sensitive color-changing hydrogel dimming glass is obtained after heating at 50 ℃ for 1.5 h.

In the experimental detection process of the mechanical strength and toughness of the temperature-sensitive color-changing hydrogel dimming glass at the temperature of-20-80 ℃, in the ball drop test, 2 groups of experimental glass at 0 ℃ are broken, and 5 groups of experimental glass at 20 ℃ are broken, and then the temperature-sensitive color-changing hydrogel dimming glass prepared in the preparation example 2B is repeatedly verified at 0 ℃ and-20 ℃ to obtain similar results, and the conclusion is that the acrylic acid-acrylamide chemical crosslinking fails and is finally embodied in a loose gel network structure because the polymerization of acrylic acid and acrylamide monomers is carried out in a reverse direction towards the raw material at a low temperature. Therefore, in order to secure the mechanical strength of the thermochromic hydrogel, when the B component is acrylic acid, the C component is not acrylamide. Statistical analysis is carried out on the heat gain coefficients in and among the temperature-sensitive color-changing hydrogel light-adjusting glass groups prepared in preparation examples 2A, 2C and 2D, no significant difference exists, and the average heat gain coefficient is 0.116; the temperature control precision of the product does not have significant difference between groups, and the temperature control precision of the product is +/-1 ℃; when the cycle times of the color-changing cycle durability experiment reach 7200 times, the sample does not generate bubbles, blooms and the like, the change value of the visible light transmittance before and after the experiment is less than or equal to 3 percent, the change value of the sun-shading coefficient is less than or equal to 0.05, namely the service life is more than 35 years.

Statistical analysis was performed on the glass samples prepared in examples 1A and 2A except for the glass samples prepared in preparation examples 1B and 2B, and there was no significant difference in the average heat gain coefficient, service life, mechanical strength and toughness, and sensitivity among the five other preparation examples.

Embodiment 2B is different from embodiment 2A in that the number of the reserved openings in the step S3 is set to 1, and the reserved openings are arranged on the side surface of the temperature-sensitive color-changing hydrogel light modulation glass and sealed by glue sealing. In the range of-20 ℃ to 80 ℃, no significant difference exists between the heat coefficient groups and between the temperature-sensitive color-changing hydrogel light-adjusting glass prepared by the preparation examples 2A and 2C, and the average heat coefficient is 0.110; the example 2B is significantly different from the example 2A and is significantly better than the example 2A, which shows that the preparation method has significant influence on the temperature-sensitive effect of the temperature-sensitive color-changing hydrogel light control glass.

Statistical analysis is carried out on the temperature-sensitive color-changing hydrogel light-adjusting glasses prepared in the preparation examples 1B and 2B except the temperature-sensitive color-changing hydrogel light-adjusting glasses prepared in the preparation examples 1B and 2B, and the average heat gain coefficient, the service life, the mechanical strength, the toughness and the sensitivity of the temperature-sensitive color-changing hydrogel light-adjusting glasses prepared in the five preparation examples except the preparation examples 1B and 2B are not significant.

Example 3 the effect of hydroxyl groups on temperature sensitive color changing hydrogel systems was mainly examined.

Example 3 was from preparations 3.A, 3.B, 3.C and 3D, respectively, using gel compounds.

Preparation examples 3.A1 to 3.A4

The component A is chitosan, the component B is carboxymethyl cellulose, the component C is polyacrylamide, a cross-linking agent and water form a gel compound, and the components A, B and C, the cross-linking agent and water are combined according to the proportion in a table 3A:

TABLE 3A component proportions of gel Compounds

Preparation examples 3.B1 to 3.B4

The component A, the component B, the component C, the cross-linking agent and water form a gel compound, and the components A, B and C, the cross-linking agent and water are proportioned according to the following table 3:

TABLE 3B component ratios of gel compounds

Preparation examples 3.C1 to 3.C4

The gel compound is formed by the component A, the component B, the component C, the cross-linking agent and water, and the components A, B and C, the cross-linking agent and water are combined according to the proportion in the following table 3C:

TABLE 3C component ratios of gel Compounds

Preparation examples 3.D1-3. D4

The gel compound is formed by the component A, the component B, the component C, the cross-linking agent and water, and the components A, B and C, the cross-linking agent and water are combined according to the proportion in the following table 3:

TABLE 3 component ratios of gel Compounds

The embodiment 3A is different from the embodiment 1A in that the amount of each raw material for preparing the high-strength temperature-sensitive color-changing hydrogel light control glass is different, and specifically comprises the following steps:

s1: adding 15kg of temperature-sensitive polymer, 15kg of gel compound, 30kg of antifreezing agent, 1kg of temperature regulator, 0.1kg of organic cross-linking agent and 0.05kg of infrared absorption functional particles into 38.65kg of water for dissolving to obtain a mixed solution A;

s4: before the mixed liquid B is injected into the glass cavity, the liquid injection pipe is deeply far away from the reserved opening by about 10-30cm, and the smaller the glass is, the shorter the deep distance is; and (3) adjusting the pipe diameter of the peristaltic pump to be 2.0cm, adjusting the speed and the flow rate of the peristaltic pump to be 2.5L/min, injecting the mixed solution B into the glass cavity, sealing the reserved opening in a plugging mode, and heating at 70 ℃ for 1.5h to obtain the dimming glass containing the high-strength temperature-sensitive color-changing hydrogel.

In the experimental detection process of the mechanical strength and the toughness of the temperature-sensitive color-changing hydrogel dimming glass within the range of-20 ℃ to 80 ℃, the experimental glass breakage condition of the temperature-sensitive color-changing hydrogel dimming glass prepared in the preparation example 3B group and the preparation example 3D group in the ball drop test is shown in table 3E, and the conclusion is that the strength is reduced probably because the adjacent hydroxyl groups are far away compared with chitosan or agar, so the acting force between the hydroxyl group and the carboxyl group, between the hydroxyl group and the amide group, and between the hydroxyl group and the hydroxyl group is weakened.

TABLE 3E CRASHING OF TEMPERATURE-SENSITIVE COLOUR-CHANGING HYDROGEL LIGHT REGULATING GLASS PREPARED BY PREPARATIVE EXAMPLE 3B GROUP AND PREPARATIVE EXAMPLE 3D GROUP

Statistical analysis is carried out on the heat gain coefficients of the preparation example 3A and the preparation example 3C in the range of-20 ℃ to 80 ℃ in a group and between groups, no significant difference exists, and the average heat gain coefficient is 0.119; the temperature control precision of the product does not have significant difference between groups, and the temperature control precision of the product is +/-1 ℃; when the cycle times of the color-changing cycle durability experiment reach 7500 times, the sample does not generate bubbles, blossoming and other phenomena, the change value of the visible light transmittance before and after the experiment is less than or equal to 3 percent, the change value of the sun-shading coefficient is less than or equal to 0.05, namely the service life is more than 35 years.

Statistical analysis was performed on the temperature-sensitive color-changing hydrogel dimming glasses prepared in examples 1A, 2A and 3A except for the temperature-sensitive color-changing hydrogel dimming glasses prepared in preparation examples 1B, 2B, 3B and 3D, and there was no significance in the differences among the average heat gain coefficient, service life, mechanical strength and toughness and sensitivity of the temperature-sensitive color-changing hydrogel dimming glasses prepared in the other 7 preparation examples.

Embodiment 3B is different from embodiment 3A in that the number of the reserved openings in the step S3 is set to 1, and the reserved openings are arranged on the side surface of the temperature-sensitive color-changing hydrogel light modulation glass and sealed by glue sealing. In the range of-20 ℃ to 80 ℃, the heat obtaining coefficients of the temperature-sensitive color-changing hydrogel light-adjusting glass prepared by the preparation examples 3A and 3C do not have significant difference in groups and among groups respectively, and the average heat obtaining coefficient is 0.111; compared with example 3A, the temperature-sensitive hydrogel light control glass has significant difference, is significantly superior to example 3A, and shows that the preparation method has significant influence on the temperature-sensitive effect of the temperature-sensitive color-changing hydrogel light control glass.

Statistical analysis was performed on temperature-sensitive color-changing hydrogel light-adjusting glasses prepared in examples 1B, 2B, 3B and 3B except for temperature-sensitive color-changing hydrogel light-adjusting glasses prepared in preparation examples 1B, 2B, 3B and 3D, and there was no significance in the differences among the average heat gain coefficient, service life, mechanical strength and toughness and sensitivity of the temperature-sensitive color-changing hydrogel light-adjusting glasses prepared in the other 7 preparation examples.

Example 4 the influence of pH on the gel system was examined primarily.

Examples 1-3 no deliberate adjustment of the pH of the gel system, the pH of the system being close to neutral between 6 and 8, it is well known to those skilled in the art that sodium carboxymethylcellulose is more stable under alkaline conditions and that the hydroxyl groups of sodium carboxymethylcellulose more readily form complexes with ferric ions under alkaline conditions, but from this consideration it is meant that the strength of the gel system is stronger under alkaline conditions when carboxymethylcellulose is the donor of the carboxyl groups, and therefore design example 4 was made to look at the pH of the gel system. Meanwhile, the prior art shows that the stability of carboxymethyl cellulose is inversely proportional to the viscosity, the stability is worse when the viscosity is larger, and the viscosity is higher when the concentration is higher.

In addition, as is well known to those skilled in the art, polyacrylamide, chitosan, gelatin and the like are unstable under acidic conditions, so that influence factors of a gel system are investigated without setting a low pH value.

Example 4A is different from example 3A in that in the preparation step S1, 15kg of a temperature-sensitive polymer, 15kg of a gel compound, 30kg of an antifreezing agent, 1kg of a temperature-adjusting agent, 0.1kg of an organic crosslinking agent, and 0.05kg of infrared absorbing functional particles are dissolved in 38.65kg of water, and the pH is adjusted to 10 to obtain a mixed solution a.

At 25 ℃, the average obtained thermal coefficient is 0.119; mechanical strength and toughness experimental test example 4A showed no significant difference from the gel system obtained in example 3A; the temperature control sensitivity of the product is +/-2 ℃, and the product has a significant difference from the product in example 3A, probably because the grid structure is too tight when the pH is 10, so that the temperature-sensitive polymer and the gel grid are mutually entangled, and the shrinkage of the temperature-sensitive polymer is influenced when the temperature changes.

Embodiment 4B is different from embodiment 4A in that the number of the reserved openings in step S3 is set to 1, and the reserved openings are arranged on the side surface of the temperature-sensitive color-changing hydrogel light modulation glass and sealed by glue sealing. In the range of-20 ℃ to 80 ℃, the heat obtaining coefficients of the temperature-sensitive color-changing hydrogel light-adjusting glass prepared in the embodiment 4B do not have significant difference in the group, and the average heat obtaining coefficient is 0.111; compared with example 4A, the temperature-sensitive color-changing hydrogel dimming glass has significant difference, is significantly superior to example 4A, and shows that the preparation method has significant influence on the temperature-sensitive effect of the temperature-sensitive color-changing hydrogel dimming glass.

Example 5 the effect of a polymer which is a triblock polymer of polyoxyethylene and polyoxybutylene on a gel system was mainly examined.

Example 5A the gel compound of preparation 3A was used, except that the temperature sensitive polymer was replaced with a triblock polymer of polyoxyethylene and polyoxybutylene, and both ends were polyoxyethylene, and the rest of the procedure was the same as in example 3A.

At 25 ℃, the average obtained thermal coefficient is 0.115; the mechanical strength and toughness test does not show that the gel system has no significant difference with the gel system obtained in the preparation example 3A; the temperature control precision of the product does not have significant difference between groups, and the temperature control precision of the product is +/-1 ℃; when the cycle times of the color-changing cycle durability experiment reach 7800 times, the sample does not generate bubbles, blossoming and other phenomena, the change value of the visible light transmittance before and after the experiment is less than or equal to 3 percent, the change value of the sun-shading coefficient is less than or equal to 0.05, namely the service life is more than 35 years.

Embodiment 5B is different from embodiment 5A in that the number of the reserved openings in the step S3 is set to 1, and the reserved openings are arranged on the side surface of the temperature-sensitive color-changing hydrogel light modulation glass and sealed by using a glue sealing method. In the range of-20 ℃ to 80 ℃, the heat obtaining coefficients of the temperature-sensitive color-changing hydrogel light-adjusting glass prepared in the embodiment 5B do not have significant difference in the group, and the heat obtaining coefficients are 0.109 on average; compared with the example 5A, the temperature-sensitive hydrogel dimming glass has significant difference and is significantly better than the example 5A, which shows that the preparation method has significant influence on the temperature-sensitive effect of the temperature-sensitive color-changing hydrogel dimming glass.

Example 6 the effect on the gel system was mainly examined when the polymer was a triblock polymer of polyoxyethylene and polyoxypentene.

Example 6A the gel compound of preparation 3A was used, except that the temperature sensitive polymer was replaced with a triblock polymer of polyoxyethylene and polyoxypentene, and both ends were polyoxyethylene, and the remaining steps were the same as in example 3A.

At 25 ℃, the average obtained thermal coefficient is 0.121; the mechanical strength and toughness test does not show that the gel system has no significant difference with the gel system obtained in the preparation example 3A; the temperature control sensitivity of the product is +/-2 ℃, and the obvious difference exists between the temperature control sensitivity of the product and the preparation example 3A, probably because the polyoxypentene chain structure is long, the temperature-sensitive polymer grid structure is wound too tightly, so that the temperature-sensitive polymer shrinkage is influenced when the temperature changes, and the sensitivity is reduced.

When the cycle times of the color-changing cycle durability experiment reach 7800 times, the sample does not generate bubbles, blossoming and other phenomena, the change value of the visible light transmittance before and after the experiment is less than or equal to 3 percent, the change value of the sun-shading coefficient is less than or equal to 0.05, namely the service life is more than 35 years.

Embodiment 6B is different from embodiment 6A in that the number of the reserved openings in the step S3 is set to 1, and the reserved openings are arranged on the side surface of the temperature-sensitive color-changing hydrogel light modulation glass and sealed by glue sealing. In the range of-20 ℃ to 80 ℃, the heat obtaining coefficients of the temperature-sensitive color-changing hydrogel light-adjusting glass prepared in the embodiment 6B do not have significant difference in the group, and the average heat obtaining coefficient is 0.113; compared with the example 6A, the temperature-sensitive color-changing hydrogel dimming glass has significant difference and is significantly better than the example 6A, which shows that the preparation method has significant influence on the temperature-sensitive effect of the temperature-sensitive color-changing hydrogel dimming glass.

Example 7 the effect of calcium ions on the gel system was mainly examined.

Example 7A differs from example 6A in that the ionic cross-linking agent, ferric sulphate, was replaced with calcium chloride and the remaining steps were the same.

At 25 ℃, the average obtained thermal coefficient is 0.118; the mechanical strength and toughness test does not show any significant difference from the gel system obtained in example 6; the temperature control sensitivity of the product is +/-1 ℃, and the product has significant difference with the temperature control sensitivity of the embodiment 6, and can be characterized in that iron ions can be complexed with three hydroxyl groups, calcium ions can be complexed with two hydroxyl groups, the chain structure of the polyoxypentene is long, and the calcium ions and the polyoxypentene are in the same gel polymer system, so that the winding density of the temperature-sensitive polymer grid structure is reduced, and the sensitivity is improved.

Embodiment 7B is different from embodiment 7A in that the number of the reserved openings in the step S3 is set to 1, and the reserved openings are arranged on the side surface of the temperature-sensitive color-changing hydrogel light modulation glass and sealed by glue sealing. In the range of-20 ℃ to 80 ℃, the heat gain coefficients of the temperature-sensitive color-changing hydrogel light-adjusting glass prepared in the embodiment 7B do not have significant difference in the group, and the heat gain coefficients are 0.113 on average; compared with example 7A, the temperature-sensitive hydrogel light-adjusting glass has significant difference and is significantly better than example 7A, which shows that the preparation method has significant influence on the temperature-sensitive effect of the temperature-sensitive color-changing hydrogel light-adjusting glass.

EXAMPLE 8 temperature-sensitive gel-bending glass

Example 8A

The gel compound is prepared from 1.A, the preparation process is the same as that in the embodiment 1B, after the temperature-sensitive gel bent steel glass is prepared, 17 gel-like unsmooth and wrinkled glass blocks in total are directly judged to be unqualified products in 30 glass blocks in five groups; the other 9 blocks have a large amount of bubbles larger than 1.5mm, and are directly judged as unqualified products by visual inspection; there are two of them, the number of bubbles larger than 1.5mm is within 10, but the number of bubbles with diameter between 5mm-10mm is 5 and 8 respectively; and the final two blocks are tested for the glue-filled glass if the test result is unqualified, and the results are shown in table 8A:

example 8B

The difference from the embodiment 8A is that the step S4 is that the mixed solution B is deeply injected into the glass cavity through the pipeline, the glass angle is adjusted every 3 to 5 minutes to ensure that the mixed solution B is uniformly distributed, the reserved opening is sealed, and the high-strength temperature-sensitive color-changing hydrogel light-adjusting bent glass is obtained after heating for 1 hour at the temperature of 30 ℃.

At 25 ℃, the average heat gain coefficient of the obtained temperature-sensitive color-changing hydrogel light-adjustable bent glass is 0.110, and the glass has no significant difference with the glass obtained in the embodiment 1B; the mechanical strength and toughness test does not show that the gel system has no significant difference with the gel system obtained in preparation example 1.A; the temperature control sensitivity of the product is +/-1 ℃; and the detection of the glue-pouring glass meets the specification.

In comparison with examples 8A and 8B, in the injection process of the bent steel glass, the step of adjusting the glass angle every 3 to 5 minutes to uniformly distribute the mixed solution B is a necessary step for preparing the qualified temperature-sensitive color-changing hydrogel light-modulation bent steel glass.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The high-strength temperature-sensitive color-changing hydrogel dimming glass comprises two layers of glass and temperature-sensitive color-changing hydrogel arranged between the two layers of glass, and is characterized in that the temperature-sensitive color-changing hydrogel is prepared from the following raw materials: 0.5-15wt% of temperature-sensitive polymer, 5-15wt% of gel compound, 5-30wt% of antifreezing agent, 0.1-1.0wt% of temperature regulator, 0.01-0.2wt% of organic cross-linking agent, 0.01-0.1wt% of infrared absorption functional particles, 0.01-0.5wt% of initiator and the balance of water;

the temperature-sensitive polymer is a triblock polymer formed by polyoxyethylene and polyoxypropylene or polyoxyethylene and polyoxybutylene, the molecular weight of the triblock polymer is 1000-8500, the HLB value of the triblock polymer is 3-30, and both ends of the triblock polymer are polyoxyethylene;

the gel compound consists of A, B and three components C:

the component A comprises: agar or chitosan;

and B component: sodium carboxymethylcellulose or acrylic acid or a mixture of the two;

and C, component C: acrylamide monomer or polyacrylamide or gelatin, and when the B component is acrylic acid, the C component is not acrylamide monomer;

the other components are water and an ionic crosslinking agent;

2. The high-strength temperature-sensitive color-changing hydrogel light control glass according to claim 1, wherein: the polymerization degree of the sodium carboxymethylcellulose is 200-300, the etherification degree is 0.6-0.7, and 2-3mmol of carboxymethyl is introduced into per 1g of dry weight of cellulose on average.

3. The high-strength temperature-sensitive color-changing hydrogel light control glass according to claim 1, wherein: the ionic crosslinking agent contains Ca ²⁺ A salt.

4. The high-strength temperature-sensitive color-changing hydrogel light control glass according to claim 1, wherein: the mass ratio of the component A to the component B to the component C is (0.1-0.5): (0.2-2): (1-5).

5. The high-strength temperature-sensitive color-changing hydrogel light control glass according to claim 1, wherein: the pH value of the temperature-sensitive color-changing hydrogel is 6-8.

6. The high-strength temperature-sensitive color-changing hydrogel light control glass according to claim 1, wherein: the use temperature of the temperature-sensitive color-changing hydrogel is-20 ℃ to 80 ℃.

7. The high-strength temperature-sensitive color-changing hydrogel light control glass according to claim 1, wherein: the average molecular weight of the polyacrylamide is 50-100 ten thousand; the average molecular weight of the gelatin is 5-7 ten thousand; the average molecular weight of the agar is 10-15 ten thousand; the average molecular weight of the chitosan is 3-5 ten thousand.

8. The high-strength temperature-sensitive color-changing hydrogel light control glass according to any one of claims 1 to 7, wherein: the heat gain coefficient of the temperature-sensitive color-changing hydrogel light-adjusting glass is more than or equal to 0.108 and less than or equal to 0.12.

9. The high-strength temperature-sensitive color-changing hydrogel light control glass according to any one of claims 1 to 7, wherein: the service life of the temperature-sensitive color-changing hydrogel light-adjusting glass is as long as 35 years.

10. The high-strength temperature-sensitive color-changing hydrogel light control glass according to any one of claims 1 to 7, wherein: the temperature control precision of the temperature-sensitive color-changing hydrogel light-adjusting glass is +/-1 ℃.