Constant-temperature formaldehyde-removing and odor-removing glass door and window and preparation method thereof

Abstract

The invention relates to the field of doors and windows, in particular to a constant-temperature formaldehyde-removing odor-removing glass door and window and a preparation method thereof. The constant-temperature formaldehyde-removing and odor-removing glass door and window comprises a glass door and window body and a constant-temperature formaldehyde-removing and odor-removing coating coated on the surface of the glass door and window body. The constant-temperature formaldehyde removal and odor removal coating is prepared from the following components in parts by weight: 40 to 60 parts of waterborne acrylic emulsion, 5 to 15 parts of hollow glass beads, 3 to 10 parts of silicon dioxide aerogel, 2 to 8 parts of a formaldehyde removal and odor removal catalyst, 0.5 to 2 parts of a wetting dispersant, 0.1 to 1 part of a de-foaming agent, 0.2 to 1.5 parts of a flatting agent, 0.2 to 2 parts of a coalescing agent and 20 to 30 parts of de-ionized water. The surface of the glass door and window is coated with the constant-temperature formaldehyde removal and odor removal coating, the coating is environment-friendly water-based paint, multiple functions of heat insulation, efficient formaldehyde removal, odor purification and the like can be integrated on the glass door and window, additional equipment or energy input is not needed, space is saved, and the glass door and window are attractive.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of doors and windows, in particular to a constant-temperature aldehyde-removing and odor-removing glass door and window and a preparation method thereof. BACKGROUND

[0002] With the rapid development of modern building technology and the continuous improvement of people's living standards, the function of building doors and windows is no longer limited to the traditional lighting, ventilation and vision functions. The requirements for energy saving and environmental protection, health and comfort, and intelligent multi-function of building doors and windows are increasing. Especially in newly renovated indoor environments such as living rooms and offices, harmful gases such as formaldehyde, benzene series and TVOC continuously released by decoration materials and furniture, and odor problems caused by poor ventilation are common. These pollutants seriously endanger human health, and the release period of formaldehyde can last for 3-15 years, and it is difficult to completely eradicate by simply relying on window ventilation.

[0003] In terms of energy saving, building exterior windows are the weakest link in the thermal performance of building envelopes and are the main channel of energy loss. Statistics show that the energy loss through doors and windows accounts for about 40%-50% of the total building energy consumption. Therefore, hollow glass, Low-E low-emissivity glass, vacuum glass and other energy-saving glass doors and windows are widely used in the market to improve the thermal insulation performance of doors and windows to achieve constant temperature comfort effect in summer and winter. However, such energy-saving glass doors and windows, while achieving good airtightness and thermal insulation, also significantly weaken the air circulation between indoor and outdoor, leading to easy accumulation of indoor pollutants and increased concentration, forming a "smoldering" effect, which in turn exacerbates the health threat of indoor air pollution to users.

[0004] To address the problem of indoor air quality, a variety of solutions have appeared on the market. One is to suggest that users install a fresh air system, but it has the disadvantages of complex installation, high cost, additional space occupation, low efficiency and high energy consumption in extreme weather (such as severe cold, scorching heat, and smog). The second is to use an air purifier, but it is mostly for indoor circulation purification, has a purification dead angle, and cannot solve the problem of cold and hot radiation near the glass door and window. The third is to develop photocatalytic materials with purification function, such as spraying a titanium dioxide coating on the surface of glass or other substrates. However, such technology usually relies heavily on ultraviolet (UV) irradiation to activate the catalytic reaction, and in an indoor environment with very weak ultraviolet light intensity, its aldehyde-removing and odor-removing efficiency is greatly reduced, making it almost impossible to function, and its practicality is limited.

[0005] Therefore, there is a significant contradiction in the prior art door and window products: high-performance energy-saving constant-temperature doors and windows and effective aldehyde removal and odor removal functions are difficult to balance. The market urgently needs an innovative glass door and window product that can integrate excellent heat preservation and insulation performance with efficient, active and low-energy indoor air purification function, so that it can continuously provide constant-temperature comfortable and clean and healthy air quality for the indoor environment without relying on external ventilation or additional energy consumption. SUMMARY

[0006] In view of the problems in the prior art, the purpose of the present application is to provide a constant-temperature aldehyde removal and odor removal glass door and window and a preparation method thereof.

[0007] The purpose of the present application is achieved by adopting the following technical solutions: In a first aspect, the present application provides a constant-temperature aldehyde removal and odor removal glass door and window, comprising a glass door and window and a constant-temperature aldehyde removal and odor removal coating coated on the surface of the glass door and window; wherein the constant-temperature aldehyde removal and odor removal coating comprises, by weight fraction: 40-60 parts of water-based acrylic emulsion, 5-15 parts of hollow glass beads, 3-10 parts of silica aerogel, 2-8 parts of aldehyde removal and odor removal catalyst, 0.5-2 parts of wetting dispersant, 0.1-1 part of defoaming agent, 0.2-1.5 parts of leveling agent, 0.2-2 parts of film-forming aid and 20-30 parts of deionized water.

[0008] Preferably, the manufacturer of the water-based acrylic emulsion is Germany's OBO BETTERMANN, and the trade name is one of AC 2518, AC 8892, AC 2598, AC 2766 and AC 2737.

[0009] Preferably, the true density of the hollow glass beads is 0.1-0.5 g / cm 3 , and the particle size is 20-30 pm.

[0010] Preferably, the bulk density of the silica aerogel is 0.05-0.15 g / cm 3 , and the average pore size is 10-50 nm.

[0011] Preferably, the aldehyde removal and odor removal catalyst is a supported catalyst, wherein aluminum yttrium bismuthate is used as an active substance, and ZSM-5 type zeolite powder is used as a carrier structure.

[0012] Preferably, the wetting dispersant is one or more of BYK-190, BYK-184 and BYK-192.

[0013] Preferably, the defoaming agent is one or more of TEGO-810, DC-65 and BYK-024.

[0014] Preferably, the leveling agent is one or more of BYK-346, BYK-333, BYK-3481.

[0015] Preferably, the film-forming aid is dipropylene glycol butyl ether or alcohol ester twelve.

[0016] Preferably, the preparation method of the aldehyde removal and odor removal catalyst comprises: S1, treating ZSM-5 type zeolite powder with a nitric acid solution, filtering, washing with water and drying to obtain activated ZSM-5 type zeolite powder; S2, weighing bismuth nitrate, aluminum nitrate and yttrium nitrate into deionized water, stirring and dissolving, then adding citric acid, stirring at 50-60℃ until a transparent and uniform solution is formed, adjusting pH to 4-5, aging at 60℃ for 2-3h to obtain a precursor sol; S3, soaking the activated ZSM-5 type zeolite powder into the precursor sol, stirring uniformly, then stirring at 70-80℃ until the water evaporates to the point where it cannot flow, to obtain a composite gel; S4, sequentially performing first calcination, hydrothermal treatment and second calcination on the composite gel to obtain an aldehyde removal and odor removal catalyst.

[0017] Preferably, in S1, the concentration of the nitric acid solution is 1mol / L, the treatment time is 2-4h, and the treatment temperature is 60-70℃.

[0018] Preferably, in S2, the ratio of bismuth nitrate, aluminum nitrate, yttrium nitrate, citric acid and deionized water is (0.53-0.76)g:(0.16-0.42)g:(0.31-0.55)g:(1.2-1.6)g:10mL.

[0019] Preferably, in S3, the ratio of activated ZSM-5 type zeolite powder and precursor sol is 1g:(3-6)mL.

[0020] Preferably, in S4, the first calcination specifically comprises: placing the composite gel in a vacuum drying oven at 110-130℃ for 5-6h, then placing it in a muffle furnace and calcining at 320-400℃ in an air atmosphere, with a heating rate of 2-3℃ / min, calcining for 2-3h, and cooling in the furnace to obtain a first calcination product.

[0021] Preferably, in S4, the hydrothermal treatment specifically comprises: mixing the first calcination product with deionized water at a mass ratio of 1:10-15, transferring into a polytetrafluoroethylene-lined high-pressure reaction kettle, heating to 160-200℃, and holding for 20-30h, then filtering to collect the solid, washing with water three times, washing with alcohol three times, and drying to obtain a hydrothermal treatment product.

[0022] Preferably, in the S4, the second calcination specifically comprises: placing the hydrothermal treatment product in a muffle furnace, calcining at 500-550 DEG C in an air atmosphere, the heating rate is 2-3 DEG C / min, the calcination time is 2-3h, after cooling in the furnace, grinding through a 400 mesh sieve, to obtain an aldehyde removal catalyst without odor.

[0023] In a second aspect, the application provides a preparation method of constant temperature aldehyde removal and odor removal glass doors and windows, comprising the following steps: Step 1, preparing glass doors and windows, cleaning the surface of the glass doors and windows, drying, and standby; Step 2, according to the proportion of the constant temperature aldehyde removal and odor removal coating ingredients, adding a wetting dispersant to deionized water, stirring at a speed of 400-600 rpm for 5-10 min at room temperature, then adding a water-based acrylic emulsion, and continuing to stir for 5-10 min to form a first emulsion; Step 3, adding hollow glass microspheres, silica aerogel and aldehyde removal and odor removal catalyst to the first emulsion, stirring at a speed of 1200-1500 rpm for 20-30 min to form a second emulsion; Step 4, adding a defoaming agent, a leveling agent and a film-forming aid to the second emulsion, stirring at a speed of 400-600 rpm for 10 min, standing for 30 min, and then filtering with a 100-200 mesh filter screen to obtain a constant temperature aldehyde removal and odor removal coating; Step 5, coating the constant temperature aldehyde removal and odor removal coating on the surface of the cleaned glass doors and windows, the coating thickness is 50-200 microns, after coating, first placing at room temperature for 30 min, then placing in an oven at 60-80 DEG C for 40-60 min, and preferably placing at room temperature for 24-72 h.

[0024] The application has the following beneficial effects: 1. The application prepares a constant temperature aldehyde removal and odor removal glass door and window, which coats a constant temperature aldehyde removal and odor removal coating on the surface of the glass door and window, the coating is an environmentally friendly water-based coating, which can integrate various functions such as heat insulation, efficient aldehyde removal and odor purification on the glass door and window, without additional equipment or energy input, saving space and being beautiful.

[0025] 2. In the composition of the constant temperature aldehyde removal and odor removal coating, hollow glass microspheres and silica aerogel are used in combination to form an efficient heat insulation system, which effectively blocks heat transfer through extremely low heat conduction and convection, thereby maintaining stable indoor temperature, improving comfort and reducing air conditioning energy consumption.

[0026] 3、The aldehyde removal and odor removal catalyst combines the high adsorption capacity of zeolite and the photocatalytic capacity of bismuth aluminum yttrium, can actively and continuously decompose harmful pollutants such as formaldehyde into harmless substances, rather than simply adsorbing, avoiding secondary pollution and saturation problems, and is especially suitable for indoor pollution environments with low concentration and long-term release. The aldehyde removal and odor removal catalyst is a supported catalyst structure, wherein bismuth aluminum yttrium is used as an active substance, and ZSM-5 type zeolite powder is used as a carrier structure. Bismuth aluminum yttrium belongs to a visible light responsive type semiconductor photocatalyst, which can be effectively excited by daily indoor visible light (even weak light), overcoming the huge limitation that traditional TiO2 and other photocatalysts must rely on ultraviolet light to work. In addition, after bismuth aluminum yttrium is loaded on the zeolite structure, not only the aldehyde removal effect is excellent, but also the strength and other properties of the overall material are greatly improved.

[0027] 4、In the process of preparing the aldehyde removal and odor removal catalyst, twice calcination and water heating processes are carried out, that is, first calcination-water heating-second calcination. The purpose of the first calcination is to completely remove organic substances such as citric acid, and to preliminarily decompose and convert the metal salt into amorphous composite oxide, which is firmly anchored on the zeolite. The water heating reaction is an important step, and the purpose is to promote the amorphous oxide to fully crystallize under the high temperature and high pressure of the water heating environment, form pure phase and complete crystal type bismuth aluminum yttrium nanocrystals, and form strong interaction with the zeolite carrier. The purpose of the second calcination is to eliminate the structural defects that may be generated in the water heating process, stabilize the crystal structure, and obtain the best surface active site. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solutions, the exemplary embodiments of the present application will be described in more detail below. Although exemplary embodiments of the present application are shown, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be fully conveyed to those skilled in the art.

[0029] The present application will be further described below in conjunction with the following examples.

[0030] Example 1 A constant temperature aldehyde removal and odor removal glass door and window comprises a glass door and window and a constant temperature aldehyde removal and odor removal paint coated on the surface of the glass door and window; wherein the constant temperature aldehyde removal and odor removal paint comprises, by weight fraction: 50 parts of water-based acrylic emulsion, 10 parts of hollow glass microbeads, 7 parts of silica aerogel, 5 parts of aldehyde removal and odor removal catalyst, 1.3 parts of wetting dispersant, 0.4 parts of defoaming agent, 0.8 parts of leveling agent, 1.2 parts of film-forming aid and 25 parts of deionized water.

[0031] The manufacturer of the aqueous acrylic emulsion is Germany OBO BETTER, and the model is AC 2518; the true density of the hollow glass beads is 0.3 g / cm 3 , the particle size is 20-30 μm; the bulk density of the silica aerogel is 0.12 g / cm 3 , the average pore size is 10-50 nm; the wet dispersing agent is BYK-190; the defoaming agent is TEGO-810; the leveling agent is BYK-346; and the film-forming aid is dipropylene glycol butyl ether.

[0032] The de-aldehyde and odor-free catalyst is aluminum bismuth yttrium zeolite powder, and the preparation method comprises the following steps: S1, activating the substrate: 10 g of ZSM-5 zeolite powder is dispersed in 100 mL of 1 mol / L nitric acid solution, stirred at 65°C for 3 h, then cooled, filtered and washed with water until neutral, dried to obtain activated ZSM-5 zeolite powder; S2, preparing a sol: 0.64 g of bismuth nitrate, 0.33 g of aluminum nitrate and 0.42 g of yttrium nitrate are added to 10 mL of deionized water, fully stirred and dissolved, then 1.4 g of citric acid is added, stirred in a water bath at 55°C until a transparent and uniform solution is formed, ammonia water is added to adjust the pH to 4-5, and aging treatment is carried out at 60°C for 2 h to obtain a precursor sol; S3, compounding a gel: 10 g of activated ZSM-5 zeolite powder is soaked in 40 mL of the precursor sol, mixed and stirred uniformly to ensure that the precursor sol penetrates into the pores and surface of the zeolite fully and uniformly, then stirred in a water bath at 70-80°C until the water evaporates to the point of not flowing, to obtain a composite gel; S4, first calcination: the composite gel is placed in a vacuum drying box at 120°C for 5 h, then placed in a muffle furnace for calcination at 360°C in an air atmosphere, the heating rate is 2°C / min, the calcination time is 2 h, and the furnace is cooled to obtain a first calcination product; S5, hydrothermal treatment: the first calcination product is mixed with deionized water at a mass ratio of 1:15, transferred into a polytetrafluoroethylene-lined high-pressure reaction kettle, heated to 180°C, and kept for 25 h, then cooled, filtered to collect the solid, washed with water three times, washed with alcohol three times, and dried to obtain a hydrothermal treatment product; S6, second calcination: the hydrothermal treatment product is placed in a muffle furnace for calcination at 530°C in an air atmosphere, the heating rate is 2°C / min, the calcination time is 2 h, and the furnace is cooled after the grinding to 400 mesh to obtain a de-aldehyde and odor-free catalyst.

[0033] The preparation method of the constant-temperature de-aldehyde and odor-free glass door and window comprises the following steps: Step 1, preparing the glass door and window: the surface of the glass door and window is cleaned and dried for standby use; Step 2, according to the proportion of the constant temperature de-aldehyde and odor-free coating ingredients, the wetting dispersant is added to the deionized water, stirred at room temperature at a speed of 500 rpm for 10 min, then the water-based acrylic emulsion is added, and the stirring is continued for 5 min to form a first emulsion; Step 3, the hollow glass microsphere, silica aerogel and de-aldehyde and odor-free catalyst are added to the first emulsion, and stirred at a speed of 1300 rpm for 30 min to form a second emulsion; Step 4, the defoaming agent, leveling agent and film-forming aid are added to the second emulsion, stirred at a speed of 500 rpm for 10 min, and after standing for 30 min, filtered with a 100 mesh filter to obtain a constant temperature de-aldehyde and odor-free coating; Step 5, the constant temperature de-aldehyde and odor-free coating is coated on the surface of the cleaned glass door and window, the coating thickness is 125 μm, after coating, it is first placed at room temperature for 30 min, then placed in an oven at 70°C for 50 min, and preferably placed at room temperature for 36 h.

[0034] Example 2 A constant temperature de-aldehyde and odor-free glass door and window, comprising a glass door and window and a constant temperature de-aldehyde and odor-free coating coated on the surface of the glass door and window; wherein the constant temperature de-aldehyde and odor-free coating comprises, by weight: 40 parts of water-based acrylic emulsion, 5 parts of hollow glass microsphere, 3 parts of silica aerogel, 2 parts of de-aldehyde and odor-free catalyst, 0.5 parts of wetting dispersant, 0.1 parts of defoaming agent, 0.2 parts of leveling agent, 0.2 parts of film-forming aid and 20 parts of deionized water.

[0035] The water-based acrylic emulsion is made by Germany Oubodui, and the model is AC 8892; the true density of the hollow glass microsphere is 0.3 g / cm 3 , and the particle size is 20-30 μm; the bulk density of the silica aerogel is 0.12 g / cm 3 , and the average pore size is 10-50 nm; the wetting dispersant is BYK-184; the defoaming agent is DC-65; the leveling agent is BYK-333; the film-forming aid is dipropylene glycol butyl ether; and the preparation method of the de-aldehyde and odor-free catalyst is the same as that of Example 1.

[0036] The preparation method of the above constant temperature de-aldehyde and odor-free glass door and window comprises the following steps: Step 1, preparing the glass door and window, cleaning the surface of the glass door and window, drying and preparing for use; Step 2, according to the proportion of the constant temperature de-aldehyde and odor-free coating ingredients, the wetting dispersant is added to the deionized water, stirred at room temperature at a speed of 400 rpm for 5 min, then the water-based acrylic emulsion is added, and the stirring is continued for 5 min to form a first emulsion; Step 3, add hollow glass microspheres, silica aerogel, and de-aldehyde odor-removing catalyst into the first emulsion, stir at a speed of 1200 rpm for 20 min to form a second emulsion; Step 4, add defoaming agent, leveling agent, and film-forming aid into the second emulsion, stir at a speed of 400 rpm for 10 min, and then filter through a 100-mesh screen after standing for 30 min to obtain the constant-temperature de-aldehyde odor-removing paint; Step 5, apply the constant-temperature de-aldehyde odor-removing paint to the surface of the cleaned glass door and window at a thickness of 100 μm, and then place it in a 60°C oven for 40 min after standing at room temperature for 30 min, and preferably standing at room temperature for 24 h.

[0037] Example 3 A constant-temperature de-aldehyde odor-removing glass door and window includes a glass door and window and a constant-temperature de-aldehyde odor-removing paint applied to the surface of the glass door and window. The constant-temperature de-aldehyde odor-removing paint includes, by weight fraction: 60 parts of water-based acrylic emulsion, 15 parts of hollow glass microspheres, 10 parts of silica aerogel, 8 parts of de-aldehyde odor-removing catalyst, 2 parts of wet dispersant, 1 part of defoaming agent, 1.5 parts of leveling agent, 2 parts of film-forming aid, and 30 parts of deionized water.

[0038] The water-based acrylic emulsion is AC 2598 from Germany's Evonik; the hollow glass microspheres have a true density of 0.3 g / cm 3 and a particle size of 20-30 μm; the silica aerogel has a bulk density of 0.12 g / cm 3 and an average pore size of 10-50 nm; the wet dispersant is BYK-192; the defoaming agent is BYK-024; the leveling agent is BYK-3481; the film-forming aid is alcohol ester twelve; and the de-aldehyde odor-removing catalyst is prepared in the same manner as in Example 1.

[0039] The method for preparing the constant-temperature de-aldehyde odor-removing glass door and window includes the following steps: Step 1, prepare the glass door and window, clean the surface of the glass door and window, dry it, and then use it; Step 2, add the wet dispersant to the deionized water according to the component proportion of the constant-temperature de-aldehyde odor-removing paint, stir at a speed of 600 rpm for 10 min at room temperature, then add the water-based acrylic emulsion, and continue to stir for 10 min to form a first emulsion; Step 3, add the hollow glass microspheres, silica aerogel, and de-aldehyde odor-removing catalyst into the first emulsion, stir at a speed of 1500 rpm for 30 min to form a second emulsion; Step 4, the defoaming agent, leveling agent and film forming aid were added into the second emulsion, stirred at 600 rpm for 10 min, after standing for 30 min, filtered with 200 mesh filter screen to obtain the constant temperature aldehyde removal odorless coating; Step 5, the constant temperature aldehyde removal odorless coating was coated on the surface of the cleaned glass door and window, the coating thickness was 200 μm, after coating, it was first placed at room temperature for 30 min, then placed in an oven at 80℃ for 60 min, and preferably placed at room temperature for 72 h.

[0040] Example 4 A constant temperature aldehyde removal odorless coating for glass door and window, which is different from example 1 only in that the preparation method of the aldehyde removal odorless catalyst in the composition is different.

[0041] The preparation method of the aldehyde removal odorless catalyst comprises: S1, activating the substrate: 10 g of ZSM-5 type zeolite powder was weighed and dispersed in 100 mL of 1 mol / L nitric acid solution, stirred at 65℃ for 3 h, then cooled, filtered and washed with water until neutral, dried to obtain activated ZSM-5 type zeolite powder; S2, preparing sol: 0.53 g of bismuth nitrate, 0.42 g of aluminum nitrate and 0.31 g of yttrium nitrate were weighed and added into 10 mL of deionized water, after fully stirring and dissolving, 1.2 g of citric acid was added, stirred in a water bath at 50℃ until a transparent and uniform solution was formed, ammonia water was added to adjust the pH to 4-5, and aged at 60℃ for 2 h to obtain a precursor sol; S3, compounding gel: 10 g of activated ZSM-5 type zeolite powder was soaked into 30 mL of precursor sol, mixed and stirred uniformly to ensure that the precursor sol penetrated into the pores and surface of the zeolite fully and uniformly, then stirred in a water bath at 70℃ until the water evaporated to the point of not flowing, to obtain a composite gel; S4, first calcination: the composite gel was placed in a vacuum drying box at 110℃ for 5 h, then placed in a muffle furnace and calcined at 320℃ in air atmosphere, the heating rate was 2℃ / min, the calcination time was 3 h, and the furnace was cooled to obtain the first calcination product; S5, hydrothermal treatment: the first calcination product was mixed with deionized water at a mass ratio of 1:15, transferred into a polytetrafluoroethylene lined high-pressure reaction kettle, heated to 160℃ and kept for 30 h, then cooled, filtered and collected the solid, washed with water three times, washed with alcohol three times, and dried to obtain the hydrothermal treatment product; S6, second calcination: the hydrothermal treatment product was placed in a muffle furnace and calcined at 500℃ in air atmosphere, the heating rate was 2℃ / min, the calcination time was 3 h, and after the furnace was cooled, it was ground through a 400 mesh screen to obtain the aldehyde removal odorless catalyst.

[0042] Example 5 A constant-temperature de-aldehyde and deodorization coating for glass doors and windows, which is different from example 1 only in that the preparation method of the de-aldehyde and deodorization catalyst in the composition is different.

[0043] The preparation method of the de-aldehyde and deodorization catalyst comprises: S1, activating the substrate: 10 g of ZSM-5 type zeolite powder is weighed and dispersed in 100 mL of 1 mol / L nitric acid solution, stirred at a temperature of 65℃ for 3 h, then cooled, filtered and washed with water until neutral, dried, and activated ZSM-5 type zeolite powder is obtained; S2, preparing a sol: 0.76 g of bismuth nitrate, 0.42 g of aluminum nitrate, and 0.55 g of yttrium nitrate are weighed and added to 10 mL of deionized water, fully stirred and dissolved, then 1.6 g of citric acid is added, stirred in a water bath at 60℃ until a transparent and uniform solution is formed, ammonia water is added to adjust the pH to 4-5, and aging treatment is carried out at 60℃ for 3 h to obtain a precursor sol; S3, compounding the gel: 10 g of activated ZSM-5 type zeolite powder is soaked into 60 mL of the precursor sol, mixed, stirred uniformly, and ensured that the precursor sol fully and uniformly penetrates into the pores and surface of the zeolite, then stirred in a water bath at 80℃ until the water evaporates to the point of not flowing, and a composite gel is obtained; S4, first calcination: the composite gel is placed in a vacuum drying box at 130℃ for 6 h, then placed in a muffle furnace for calcination at 400℃ in an air atmosphere, the heating rate is 3℃ / min, the calcination time is 2 h, and the furnace is cooled to obtain a first calcination product; S5, hydrothermal treatment: the first calcination product is mixed with deionized water at a mass ratio of 1:15, transferred into a polytetrafluoroethylene-lined high-pressure reaction kettle, heated to 200℃, and kept for 20 h, then cooled, filtered to collect the solid, washed with water three times, washed with alcohol three times, dried, and a hydrothermal treatment product is obtained; S6, second calcination: the hydrothermal treatment product is placed in a muffle furnace for calcination at 550℃ in an air atmosphere, the heating rate is 3℃ / min, the calcination time is 2 h, and after the furnace is cooled, it is ground through a 400 mesh sieve to obtain a de-aldehyde and deodorization catalyst.

[0044] Comparative Example 1 A constant-temperature de-aldehyde and deodorization coating, which is different from example 1 only in that the de-aldehyde and deodorization catalyst in the composition is replaced by bismuth aluminum zeolite powder, i.e. bismuth aluminum as the active substance, ZSM-5 type zeolite powder as the carrier structure, and other components and preparation methods are the same as example 1.

[0045] The preparation method of the de-aldehyde and deodorization catalyst comprises: S1, Activation of the substrate, the same as in Example 1; S2, Preparation of the sol: 0.64 g of bismuth nitrate, 0.75 g of aluminum nitrate were weighed into 10 mL of deionized water, after fully stirring and dissolving, 1.4 g of citric acid was added, stirring in a water bath at 55°C until a transparent and uniform solution was formed, ammonia water was added dropwise to adjust the pH to 4-5, and aging treatment was carried out at 60°C for 2 h to obtain the precursor sol; S3-S6, the same as in Example 1.

[0046] Comparative Example 2 A constant-temperature aldehyde-removing and odor-removing coating, which is different from Example 1 only in that the aldehyde-removing and odor-removing catalyst in the composition is replaced by yttrium bismuthate zeolite powder, i.e., bismuth aluminum is used as the active substance and ZSM-5 type zeolite powder is used as the carrier structure, and other components and preparation methods are the same as in Example 1.

[0047] The preparation method of the aldehyde-removing and odor-removing catalyst comprises: S1, Activation of the substrate, the same as in Example 1; S2, Preparation of the sol: 0.64 g of bismuth nitrate, 0.75 g of yttrium nitrate were weighed into 10 mL of deionized water, after fully stirring and dissolving, 1.4 g of citric acid was added, stirring in a water bath at 55°C until a transparent and uniform solution was formed, ammonia water was added dropwise to adjust the pH to 4-5, and aging treatment was carried out at 60°C for 2 h to obtain the precursor sol; S3-S6, the same as in Example 1.

[0048] Comparative Example 3 A constant-temperature aldehyde-removing and odor-removing coating, which is different from Example 1 only in that the aldehyde-removing and odor-removing catalyst in the composition is directly sintered in the preparation process without the operation of "first calcination-hydrothermal treatment-second calcination". Other components and preparation methods are the same as in Example 1.

[0049] The preparation method of the aldehyde-removing and odor-removing catalyst comprises: S1-S3, the same as in Example 1; S4, Calcination: the composite gel was placed in a vacuum drying oven at 120°C for 5 h, and then placed in a muffle furnace for calcination at 530°C in an air atmosphere, the heating rate was 2°C / min, the calcination time was 2 h, after cooling in the furnace, it was ground through a 400 mesh sieve to obtain the aldehyde-removing and odor-removing catalyst.

[0050] (1) Basic performance test: The base properties of the constant temperature aldehyde removal odorless coatings prepared in Example 1, Comparative Examples 1-3 were detected and compared, including hardness, adhesion and thermal conductivity, etc. Among them, the detection methods include: coating hardness refers to ASTM D3363; coating adhesion refers to ASTM D3359; wear resistance refers to ASTM D4060 (Taber, CS-10 wheel, 1000g, 1000 revolutions); thermal conductivity refers to GB / T 10295-2008 (heat flow meter method).

[0051] The specific test results are shown in Table 1: Table 1 Base property test results (2) Performance test: The performance of the constant temperature aldehyde removal odorless coatings prepared in Example 1, Comparative Examples 1-3 was detected and compared, including formaldehyde purification, odor removal effect and weather resistance. The formaldehyde purification test refers to JC / T 1074-2021, the size of the glass plate is 500mm×500mm, the temperature is (23+2)℃, the relative humidity is (50+10)%, the formaldehyde concentration is 0.1mg / m 3 , the formaldehyde purification efficiency within 24h under natural light; the odor removal effect test is sensory evaluation, the ammonia gas concentration is 0.1mg / m 3 , the sensory evaluation of odor change (excellent> good> poor); the weather resistance test refers to ASTM G154-2023, QUV accelerated aging, 1000h, the color difference (ΔE) and the powder grade (0-5) are detected.

[0052] The specific test results are shown in Table 2: Table 2 Performance test results From Table 1 and Table 2, it can be seen that the constant temperature aldehyde removal odorless coating prepared in Example 1 of the present application not only has excellent hardness, adhesion, wear resistance and thermal insulation performance, but also has extremely excellent formaldehyde purification efficiency, which can reach 94.1% in 24h formaldehyde purification efficiency, in addition, it also has excellent odor removal effect and weather resistance.

[0053] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the specification.

[0054] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those ordinarily skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A constant temperature formaldehyde removal and odor removal glass door and window, characterized in that: It includes glass doors and windows and a constant temperature formaldehyde-removing and odor-removing paint applied on the surface of the glass doors and windows; wherein the constant temperature formaldehyde-removing and odor-removing paint is calculated in parts by weight and includes: 40-60 parts of water-based acrylic emulsion, 5-15 parts of hollow glass microspheres, 3-10 parts of silica aerogel, 2-8 parts of formaldehyde and odor removal catalyst, 0.5-2 parts of wetting and dispersing agent, 0.1-1 parts of defoaming agent, 0.2-1.5 parts of leveling agent, 0.2-2 parts of film-forming aid and 20-30 parts of deionized water; The formaldehyde removal and odor removal catalyst is a supported catalyst, wherein aluminum yttrium bismuthate serves as an active substance and ZSM-5 zeolite powder serves as a carrier structure.

2. The constant temperature formaldehyde removal and odor removal glass door and window according to claim 1, characterized in that: The brand of the water-based acrylic emulsion is one of AC 2518, AC 8892, AC 2598, AC 2766, and AC 2737; the true density of the hollow glass microspheres is 0.1-0.5 g / cm 3 , particle size is 20-30 μm; the bulk density of the silica aerogel is 0.05-0.15 g / cm 3 , the average pore size is 10-50nm.

3. The constant temperature formaldehyde removal and odor removal glass door and window according to claim 1, characterized in that: The wetting and dispersing agent is one or more of BYK-190, BYK-184, and BYK-192; the defoaming agent is one or more of TEGO-810, DC-65, and BYK-024; the leveling agent is one or more of BYK-346, BYK-333, and BYK-3481; and the film-forming aid is dipropylene glycol butyl ether or alcohol ester dodecahydrate.

4. The constant temperature formaldehyde removal and odor removal glass door and window according to claim 1, characterized in that: The preparation method of the formaldehyde removal and odor removal catalyst comprises: S1, treating ZSM-5 zeolite powder with nitric acid solution, filtering, washing and drying to obtain activated ZSM-5 zeolite powder; S2. Weigh bismuth nitrate, aluminum nitrate, and yttrium nitrate and add them to deionized water. Stir thoroughly to dissolve them, then add citric acid and stir at 50-60° C. until a transparent and uniform solution is formed. Adjust the pH to 4-5 and age at 60° C. for 2-3 hours to obtain a precursor sol. S3, soaking the activated ZSM-5 zeolite powder into the precursor sol, stirring evenly, and then stirring at 70-80° C. until the water evaporates to the point where it cannot flow, thereby obtaining a composite gel; S4. The composite gel is subjected to a first calcination, a hydrothermal treatment and a second calcination in sequence to obtain a aldehyde removal and odor removal catalyst.

5. The constant temperature formaldehyde removal and odor removal glass door and window according to claim 4, characterized in that: In S2, the ratio of bismuth nitrate, aluminum nitrate, yttrium nitrate, citric acid and deionized water is (0.53-0.76) g: (0.16-0.42) g: (0.31-0.55) g: (1.2-1.6) g: 10 mL.

6. The constant temperature formaldehyde removal and odor removal glass door and window according to claim 4, characterized in that: In the S3, the ratio of activated ZSM-5 zeolite powder to precursor sol is 1 g: (3-6) mL.

7. The constant temperature formaldehyde removal and odor removal glass door and window according to claim 4, characterized in that: In the S4, the first calcination specifically includes: placing the composite gel in a vacuum drying oven at 110-130°C for 5-6 hours, and then placing it in a muffle furnace and calcining it in an air atmosphere at 320-400°C at a heating rate of 2-3°C / min for 2-3 hours, and cooling it in the furnace to obtain the first calcination product.

8. The constant temperature formaldehyde-removing and odor-removing glass door and window according to claim 4, characterized in that: In the S4, the hydrothermal treatment specifically includes: mixing the first calcined product with deionized water in a mass ratio of 1:10-15, transferring the mixture into a polytetrafluoroethylene-lined autoclave, heating the mixture to 160-200°C, and heat-treating the mixture for 20-30 hours. After cooling, the solid is collected by filtration, washed three times with water, washed three times with alcohol, and dried to obtain a hydrothermally treated product.

9. The constant temperature formaldehyde removal and odor removal glass door and window according to claim 4, characterized in that: In said S4, the second calcination specifically comprises: placing the hydrothermal treatment product in a muffle furnace, calcining in an air atmosphere at 500-550°C, with a heating rate of 2-3°C / min, and a calcination time of 2-3h, and after cooling in the furnace, grinding through a 400-mesh sieve to obtain an aldehyde removal and odor removal catalyst.

10. A method for preparing the constant temperature formaldehyde-removing and odor-removing glass doors and windows according to claim 1, characterized in that: The following steps are involved: Step 1: Prepare the glass doors and windows. Clean the surface of the glass doors and windows, dry them, and set aside. Step 2: adding a wetting dispersant to deionized water according to the proportion of the constant temperature formaldehyde-free and odor-free coating components, and then adding an aqueous acrylic emulsion to form a first emulsion; Step 3, adding hollow glass microspheres, silica aerogel, and formaldehyde removal and odor removal catalyst into the first emulsion to form a second emulsion; Step 4, adding a defoaming agent, a leveling agent and a film-forming aid to the second emulsion to obtain a constant temperature formaldehyde-removing and odor-free coating; Step 5: Apply the constant temperature formaldehyde-removing and odor-removing paint on the surface of the cleaned glass doors and windows and wait for it to dry.

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