Transparent aerogel plate thin hollow glass and preparation method thereof

Abstract

The invention relates to the technical field of glass deep processing, and discloses transparent aerogel plate thin hollow glass and a preparation method thereof.The transparent aerogel plate thin hollow glass comprises at least two glass sheets arranged in parallel at intervals, and a cavity is formed between every two adjacent glass sheets; the transparent aerogel plate is fixedly attached to the surface of at least one glass sheet, and the transparent aerogel plate is located in the cavity. The transparent aerogel plate with the low heat transfer coefficient is directly and fixedly attached to the glass sheet, the transparent thin hollow glass with the low heat transfer coefficient is formed, the weight and the thickness are reduced, and the transparent aerogel plate thin hollow glass is light-transmitting and shadow-transmitting.

Description

Technical Field

[0001] This invention relates to the field of glass deep processing technology, specifically to a transparent aerogel sheet thin insulating glass and its preparation method. Background Technology

[0002] With increasingly stringent requirements for building energy conservation, higher demands are being placed on the thermal insulation performance of glass. Currently, insulated glass units in building doors, windows, and curtain walls primarily achieve a lower overall heat transfer coefficient by increasing the number of cavities and the thickness of the glass, thereby reducing heat conduction and convection.

[0003] However, the increase in the number of existing insulated glass chambers and the increase in glass thickness directly increases the overall thickness and weight of insulated glass, and also increases the thickness and weight of the matching profiles, resulting in increasingly bulky building doors and windows. Summary of the Invention

[0004] In view of this, the present invention provides a transparent aerogel sheet thin insulating glass to solve the problem that the increase in the number of chambers and the increase in glass thickness of existing insulating glass directly increases the overall thickness and weight of the insulating glass, and also increases the thickness and weight of the matching profiles, resulting in increasingly bulky building doors and windows.

[0005] In a first aspect, the present invention provides a transparent aerogel sheet thin insulating glass, comprising: At least two parallel glass plates spaced apart, with a cavity formed between adjacent glass plates; A transparent aerogel plate is fixedly attached to the surface of at least one glass sheet, and the transparent aerogel plate is located within the cavity. Beneficial effects: This application adopts the above technical solution to directly fix a transparent aerogel plate with a low heat transfer coefficient onto a glass sheet, forming a transparent thin-walled insulating glass with a low heat transfer coefficient. This not only reduces weight and thickness but also achieves both light and shadow transmission in the transparent aerogel plate thin-walled insulating glass.

[0006] Optionally, the transparent aerogel plate is formed by directly reacting and curing the mixed solution that forms the transparent aerogel plate onto the surface of the glass sheet. Beneficial effects: This application adopts the above technical solution, directly reacting and curing a transparent aerogel plate with a low heat transfer coefficient onto the glass sheet to form a transparent thin insulating glass with a low heat transfer coefficient. The transparent aerogel plate exhibits no cracking or bubbling, has a uniform internal structure, and high consistency in light transmittance and heat transfer coefficient at different locations. Compared with aerogel particle filling technology, it effectively avoids the sedimentation problem and opacity problem caused by light scattering when using particles as fillers.

[0007] Optionally, it also includes: A spacer strip is placed between adjacent glass sheets near the periphery, and the outer periphery of the transparent aerogel plate is attached to the inner side of the spacer strip; the outermost end of the periphery of the chamber is sealed with sealant to form a sealed chamber.

[0008] Optionally, when the spacer is made of a non-adhesive material, the spacer is bonded to the contacting glass sheet by butyl adhesive; when the spacer is made of an adhesive material, the spacer is directly bonded to the contacting glass sheet.

[0009] Optionally, the non-adhesive spacer strip is an aluminum strip, a stainless steel strip, or a plastic warm edge strip; the adhesive material is thermoplastic hollow sealant.

[0010] Optionally, the sealant is a silicone sealant, polysulfide sealant, or polyurethane sealant.

[0011] Secondly, the present invention also provides a method for preparing the aforementioned transparent aerogel plate thin insulating glass, comprising: A sealing strip is set around the perimeter of the surface of the transparent aerogel plate to be fixed on the horizontally placed glass slide to form a cavity; Pour the mixed solution for preparing transparent aerogel plates into the concave cavity; After the mixed solution has solidified into a transparent aerogel plate, the edge strip is removed. An aging treatment is performed on the glass slide to which the transparent aerogel plate is fixedly attached; The glass slide with the fixed transparent aerogel plate after aging treatment was immersed in the modifier solution; Supercritical drying was performed on glass slides with fixed transparent aerogel plates after soaking; At least one glass sheet with a transparent aerogel plate fixedly attached is assembled to form a transparent aerogel plate thin insulating glass; the transparent aerogel plate is located in the cavity between adjacent glass sheets.

[0012] Optionally, the mixed solution is prepared according to the following steps: The silicon source, ethanol, water, acidic solution, template agent and / or additives are stirred and mixed in the set proportions and in the set order; Add an alkaline solution and stir to form a mixed solution for preparing transparent aerogel plates.

[0013] Optionally, the silicon source is tetraethyl orthosilicate-40 or tetraethyl orthosilicate-28; the acidic solution is an acidic solution with a pH value less than 4; the additive is nano-glass fiber or resin fiber; the template agent is hexadecyltrimethylammonium bromide or N,N-dimethylformamide; the alkaline solution is an alkaline solution with a pH value greater than 10; the modifier solution is a mixed solution of methyltriethoxysilane, tetraethyl orthosilicate-40 and ethanol solution; or the modifier solution is a mixed solution of hexamethyldisilazane, tetraethyl orthosilicate-28 and ethanol solution.

[0014] Optionally, the edge strip is sealed and bonded to the glass sheet. Beneficial effect: This application employs the above technical solution to ensure that there will be no leakage after the subsequent addition of the mixed solution for preparing the transparent aerogel plate. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a partial cross-sectional view of the transparent aerogel sheet thin insulating glass provided in an embodiment of the present invention. Figure 1 ; Figure 2 This is a partial cross-sectional view of the transparent aerogel sheet thin insulating glass provided in an embodiment of the present invention. Figure 2 .

[0017] Explanation of reference numerals in the attached figures: 1. Glass slide; 2. Transparent aerogel board; 3. Spacer strip; 4. Sealant; 5. Butyl rubber. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 2One specific embodiment of the transparent aerogel sheet thin insulating glass shown includes: at least two parallel glass sheets 1 and a transparent aerogel sheet 2. The transparent aerogel sheet 2 has a nanoporous structure, is a nanoscale porous solid material with very low density; the low density and lightweight nanoporous structure endows the transparent aerogel sheet 2 with excellent thermal insulation and sound insulation properties. The thickness of the transparent aerogel sheet 2 can be from 1 mm to 15 mm.

[0020] A cavity is formed between adjacent glass slides 1. The transparent aerogel plate 2 is fixedly attached to the surface of at least one glass slide 1, and the transparent aerogel plate 2 is located within the cavity. Figure 1 and Figure 2 As shown, three glass plates 1 are arranged in parallel and spaced apart, forming two chambers. Figure 1 In the middle, the transparent aerogel plate 2 is located in two chambers; in Figure 2 In this design, a transparent aerogel panel 2 is located within a cavity. The glass sheet 1 in the middle layer is a thin glass with a thickness of no more than 3 mm. The use of thin glass in the middle layer further reduces the overall weight of the insulated glass unit. At the same time, the transparent aerogel panel 2 is placed inside the hollow cavity, providing protection for the transparent aerogel panel 2. The excellent thermal insulation performance of the transparent aerogel panel 2 can reduce the thickness of the hollow cavity, achieving thinner and lighter insulated glass units, thus saving energy and materials.

[0021] For insulated glass filled with gel particles, interfacial scattering between the gel particles causes the glass to be translucent but not transparent. Furthermore, the filling and fixing of the gel particles is difficult, severely limiting its applications. For coated aerogel glass, although it is thin, its thermal insulation performance is relatively poor. For bulk aerogel glass, the aerogel bulk is prone to cracking and breakage during preparation, and the manufacturing process is difficult, making its application challenging.

[0022] Specifically, the transparent aerogel plate 2 is formed by directly reacting and curing the mixed solution that forms the transparent aerogel plate 2 onto the surface of the glass sheet 1.

[0023] Furthermore, the transparent aerogel sheet thin insulating glass of this application further includes: a spacer strip 3. The spacer strip 3 is disposed between adjacent glass sheets 1 near the periphery, and the outer periphery of the transparent aerogel sheet 2 is attached to the inner side of the spacer strip 3; the outermost end of the periphery of the chamber is sealed with sealant 4 to form a sealed chamber. The thickness of the spacer strip 3 can be 6 mm to 23 mm. The spacer strips 3 are joined end to end to form a sealed chamber.

[0024] like Figure 1 As shown, the outer glass sheet 1 has a thickness of 5 mm, the middle glass sheet 1 has a thickness of 1 mm, the spacer strip 3 has a thickness of 6 mm, and the transparent aerogel plate 2 has a thickness of 4 mm.

[0025] Specifically, when the spacer 3 is made of a non-adhesive material, the spacer 3 is bonded to the contacting glass sheet 1 by butyl adhesive 5; when the spacer 3 is made of an adhesive material, the spacer 3 is directly bonded to the contacting glass sheet 1.

[0026] Specifically, the non-adhesive spacer strip 3 is an aluminum strip, a stainless steel strip, or a plastic warm edge strip; the adhesive material is thermoplastic hollow sealant.

[0027] Specifically, the sealant 4 is silicone sealant, polysulfide sealant, or polyurethane sealant.

[0028] Furthermore, a Low-E film, a sunlight control film, or a color-changing film can be deposited on the glass sheet 1 of the intermediate layer, wherein the Low-E film, sunlight control film, or color-changing film is located within the cavity. The color-changing film can be an electrochromic film.

[0029] like Figure 2 As shown, the thickness of the glass sheet 1 in the middle layer is 1 mm, the thickness of the spacer strip 3 is 22 mm, and the thickness of the transparent aerogel plate 2 is 6 mm. The transparent aerogel plate 2 is fixedly attached to the upper side of the glass sheet 1 in the middle layer. The side of the upper glass sheet 1 facing the hollow cavity is coated with a Low-E film, and the side of the lower glass sheet 1 facing the hollow cavity is coated with an electrochromic film.

[0030] Furthermore, the chamber is filled with at least one of air, argon, and krypton.

[0031] Transparent aerogel board 2 is currently the best thermal insulation material. It has an extremely low heat transfer coefficient and density. When applied to insulated glass, it significantly reduces the heat transfer coefficient of the insulated glass, significantly improves the overall thermal insulation performance of the insulated glass, and basically does not increase the weight of the insulated glass.

[0032] This application also proposes a method for preparing the aforementioned transparent aerogel plate thin insulating glass, comprising the following steps: S1. A sealing strip is provided around the perimeter of the surface of the transparent aerogel plate 2 to be fixed on the horizontally placed glass slide 1, forming a cavity to ensure that the strip is completely connected to the glass slide 1 and that there will be no leakage after the mixed solution for preparing the transparent aerogel plate 2 is added. The strip can be a silicone strip.

[0033] S2. Pour the mixed solution for preparing the transparent aerogel plate 2 into the concave cavity.

[0034] S3. After the mixed solution has solidified into a transparent aerogel plate 2, remove the edge strip. The curing time can be 0.2 hours to 3 hours.

[0035] S4. The glass slide 1 to which the transparent aerogel plate 2 is fixedly attached is subjected to an aging treatment. The aging treatment time can be 24 hours to 168 hours. The aging treatment is performed by immersion in ethanol.

[0036] S5. Immerse the glass slide 1 with the fixed transparent aerogel plate 2 after aging treatment in the modifier solution. The immersion time can be 8 hours to 48 hours.

[0037] S6. Supercritical drying is performed on the glass slide 1 with the fixed transparent aerogel plate 2 after soaking.

[0038] S6. At least one glass sheet 1 with a transparent aerogel plate 2 fixedly attached is assembled to form a transparent aerogel plate thin insulating glass; the transparent aerogel plate 2 is located in the cavity between adjacent glass sheets 1.

[0039] Specifically, the mixed solution is prepared according to the following steps: S21. Thoroughly mix the silicon source, ethanol, water, acidic solution, template agent and / or additives according to the set ratio and order.

[0040] S22. Add an alkaline solution and stir to form a mixed solution for preparing transparent aerogel plate 2.

[0041] Specifically, the silicon source is tetraethyl orthosilicate-40 or tetraethyl orthosilicate-28; the acidic solution is an acidic solution with a pH value less than 4; the acidic solution can be hydrochloric acid or oxalic acid. The additive is nano-glass fiber or resin fiber; the template agent is hexadecyltrimethylammonium bromide or N,N-dimethylformamide. The alkaline solution is an alkaline solution with a pH value greater than 10; the alkaline solution can be ammonia or sodium hydroxide. When the alkaline solution is ammonia, ammonia is added and then stirred for 2 to 10 minutes. The modifier solution is a mixed solution of methyltriethoxysilane, tetraethyl orthosilicate-40, and ethanol; or the modifier solution is a mixed solution of hexamethyldisilazane, tetraethyl orthosilicate-28, and ethanol.

[0042] When the silicon source is tetraethyl orthosilicate-40, the acidic solution is hydrochloric acid, the template agent is hexadecyltrimethylammonium bromide, the alkaline solution is ammonia, and the modifier solution is a mixture of methyltriethoxysilane, tetraethyl orthosilicate-40, and ethanol, tetraethyl orthosilicate-40, ethanol, and water are mixed uniformly in a molar ratio of 1:8:2.5. Hydrochloric acid is added to the resulting mixed solution to adjust the pH to 2.0, and then 0.8% by mass of hexadecyltrimethylammonium bromide is added. After thoroughly stirring and dissolving methylammonium bromide, ammonia water is added to adjust the pH value to 6.7, and then the mixture is poured into the cavity. After curing for 0.2 hours, the glass slide 1 with the cured transparent aerogel plate 2 attached is immersed in ethanol. After aging for 24 hours, it is taken out and then immersed in an ethanol mixture solution with methyltriethoxysilane and tetraethyl orthosilicate-40 in a molar ratio of 1:0.8 for modification. After 48 hours, it is taken out and subjected to supercritical ethanol drying to obtain the final transparent aerogel plate 2.

[0043] When the silicon source is tetraethyl orthosilicate-28, the acidic solution is oxalic acid, the additive is nanofiber glass, the template agent is N,N-dimethylformamide, the alkaline solution is sodium hydroxide solution, and the modifier solution is a mixture of hexamethyldisilazane, tetraethyl orthosilicate-28, and ethanol, tetraethyl orthosilicate-28, ethanol, and water are mixed evenly in a molar ratio of 1:8:2.4. Oxalic acid is added to the resulting mixed solution to adjust the pH to 2.0, and then 0.5% by mass of N,N-dimethylformamide is added. Formamide and 0.1% by mass of nanoglass fibers were dissolved by thorough stirring, and sodium hydroxide was added to adjust the pH to 6.7. The solution was then poured into the cavity. After curing for 3 hours, the glass sheet 1 with the cured transparent aerogel plate 2 attached was immersed in ethanol. After aging for 168 hours, it was removed and then immersed in a ethanol mixture containing hexamethyldisilazane and tetraethyl orthosilicate-28 in a molar ratio of 1:0.2 for modification. After 8 hours, it was removed and subjected to supercritical carbon dioxide drying to obtain the final transparent aerogel plate 2.

[0044] Specifically, the edge strip is sealed and bonded to the glass sheet 1 to ensure complete bonding between the edge strip and the glass sheet 1, so that there will be no leakage after the mixed solution for preparing the transparent aerogel plate 2 is added.

[0045] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A transparent aerogel sheet thin insulating glass, characterized in that, include: At least two parallel glass plates (1) are spaced apart, and a cavity is formed between adjacent glass plates (1); A transparent aerogel plate (2) is fixedly attached to the surface of at least one glass plate (1), and the transparent aerogel plate (2) is located in the cavity.

2. The transparent aerogel sheet thin insulating glass according to claim 1, characterized in that, The transparent aerogel plate (2) is formed by directly reacting and curing the mixed solution that forms the transparent aerogel plate (2) onto the surface of the glass sheet (1).

3. The transparent aerogel sheet thin insulating glass according to claim 1 or 2, characterized in that, Also includes: A spacer (3) is placed between adjacent glass plates (1) near the periphery, and the outer periphery of the transparent aerogel plate (2) is attached to the inner side of the spacer (3); the outermost end of the periphery of the chamber is sealed with sealant (4) to form a closed chamber.

4. The transparent aerogel sheet thin insulating glass according to claim 3, characterized in that, When the spacer (3) is made of a non-adhesive material, the spacer (3) is bonded to the glass sheet (1) in contact with it by butyl glue (5); when the spacer (3) is made of an adhesive material, the spacer (3) is directly bonded to the glass sheet (1) in contact with it.

5. The transparent aerogel sheet thin insulating glass according to claim 4, characterized in that, The non-adhesive spacer strip (3) is an aluminum strip, a stainless steel strip, or a plastic warm edge strip; the adhesive material is thermoplastic hollow sealant.

6. The transparent aerogel sheet thin insulating glass according to claim 3, characterized in that, The sealant (4) is a silicone sealant, polysulfide sealant, or polyurethane sealant.

7. A method for preparing a transparent aerogel sheet thin insulating glass according to any one of claims 1-6, characterized in that, include: A sealing strip is set around the surface of the transparent aerogel plate (2) to be fixed on the horizontally placed glass plate (1) to form a cavity; Pour the mixed solution for preparing the transparent aerogel plate (2) into the concave cavity; After the mixed solution has solidified into a transparent aerogel plate (2), the edge strip is removed; The glass slide (1) on which the transparent aerogel plate (2) is fixedly attached is subjected to aging treatment; The glass slide (1) with the fixed transparent aerogel plate (2) after aging treatment was immersed in the modifier solution; The glass slide (1) with the fixed transparent aerogel plate (2) after soaking was subjected to supercritical drying; At least one glass sheet (1) with a transparent aerogel plate (2) fixedly attached is assembled to form a transparent aerogel plate thin insulating glass; the transparent aerogel plate (2) is located in the cavity between adjacent glass sheets (1).

8. The method for preparing transparent aerogel sheet thin insulating glass according to claim 7, characterized in that, The mixed solution is prepared according to the following steps: The silicon source, ethanol, water, acidic solution, template agent and / or additives are stirred and mixed in a set ratio and in a set order; Add an alkaline solution and stir to form a mixed solution for preparing transparent aerogel plates (2).

9. The method for preparing transparent aerogel sheet thin insulating glass according to claim 8, characterized in that, The silicon source is tetraethyl orthosilicate-40 or tetraethyl orthosilicate-28; the acidic solution is an acidic solution with a pH value less than 4; the additive is nano-glass fiber or resin fiber; the template agent is hexadecyltrimethylammonium bromide or N,N-dimethylformamide; the alkaline solution is an alkaline solution with a pH value greater than 10; the modifier solution is a mixed solution of methyltriethoxysilane, tetraethyl orthosilicate-40 and ethanol solution; or the modifier solution is a mixed solution of hexamethyldisilazane, tetraethyl orthosilicate-28 and ethanol solution.

10. The method for preparing transparent aerogel plate thin insulating glass according to claim 7, characterized in that, The edging strip is sealed and bonded to the glass sheet (1).

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