High-light-transmittance aerogel modified hollow glass curtain wall and preparation method thereof

Abstract

The invention relates to the technical field of glass curtain walls, and discloses a high-light-transmittance aerogel modified hollow glass curtain wall and a preparation method thereof.The high-light-transmittance aerogel modified hollow glass curtain wall comprises an outer-layer glass plate, an inner-layer glass plate, a hollow layer, a sealing frame and a spacing bar, a high-light-transmittance aerogel material is arranged in the hollow layer, and a drying agent is arranged in the spacing bar; the aerogel material with high light transmittance is silicon dioxide aerogel. According to the high-light-transmittance aerogel modified hollow glass curtain wall and the preparation method thereof, the hollow layer is filled with the high-light-transmittance aerogel material, the heat insulation performance, the light transmittance and the sound insulation performance of the curtain wall are remarkably improved, and the curtain wall has the advantages of being light in weight, capable of saving energy, environmentally friendly, excellent in fireproof performance and the like, is suitable for the field of high-rise buildings and energy-saving buildings and has wide application prospects. The preparation method comprises the steps of glass plate pretreatment, spacing bar installation, aerogel filling, sealing treatment, post-treatment and the like, the process is simple, and industrial production is easy to realize.

Description

Technical Field

[0001] The invention relates to the technical field of glass curtain walls, in particular to a high-transmittance aerogel-modified hollow glass curtain wall and a preparation method thereof. Background Art

[0002] Glass curtain wall is a modern building exterior wall form, mainly composed of glass panels and supporting structures. It is usually used in high-rise buildings, commercial buildings, terminals, stadiums and other large venues. Glass curtain wall is an exterior wall system that uses glass as the main material. It is fixed to the building facade through a metal frame or other supporting structure to form a continuous, transparent enclosure structure.

[0003] However, the existing hollow glass curtain walls mainly rely on air or inert gas (such as argon) in the hollow layer for heat insulation, but their heat insulation performance is relatively limited, especially under extreme climatic conditions, and cannot effectively prevent the transfer of heat. The structure of the traditional hollow glass curtain wall is relatively thick, especially the multi-layer hollow glass, which increases the load on the building structure. Although the hollow glass has a certain sound insulation effect, its ability to isolate high-frequency noise is limited and cannot meet the high requirements of the acoustic environment. At the same time, due to insufficient heat insulation performance, the traditional curtain wall requires more air conditioning and cooling in summer and more heating in winter, resulting in high building energy consumption. Therefore, a high-transmittance aerogel-modified hollow glass curtain wall and a preparation method thereof are proposed to solve the above problems. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a high-transmittance aerogel-modified hollow glass curtain wall and a preparation method thereof, which have the advantages of good thermal insulation performance and the like, and solve a series of problems existing in the existing hollow glass curtain walls: first, it mainly relies on the air or inert gas in the hollow layer for thermal insulation, and the thermal insulation performance is limited, and it is difficult to effectively block heat transfer under extreme climates; second, the structure is heavy, and the multi-layer hollow glass will increase the load on the building structure; third, the sound insulation effect is limited, and the ability to isolate high-frequency noise is insufficient, and it cannot meet the high requirements of the acoustic environment; fourth, due to insufficient thermal insulation, the building has high energy consumption in winter and summer.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a high-transmittance aerogel-modified hollow glass curtain wall, comprising an outer glass plate, an inner glass plate, a hollow layer, a sealing frame and a spacer, wherein a high-transmittance aerogel material is arranged inside the hollow layer, and a desiccant is arranged inside the spacer.

[0008] Preferably, the high-transmittance aerogel material is a silica aerogel, comprising the following components: 28% silicon source (ethyl orthosilicate), 2% catalyst (hydrochloric acid (HCl) solution), 65% solvent (anhydrous ethanol), 3% surface modifier (trimethylchlorosilane) and 2% nano-titanium dioxide;

[0009] The preparation process of the high light transmittance aerogel material comprises the following steps:

[0010] H1. Mixing and stirring: first pour the solvent into the container according to the above ratio, then slowly add the silicon source, stir evenly, then add the catalyst, and continue stirring for 30-60 minutes to fully mix the solution and start the hydrolysis reaction to form a uniform sol system;

[0011] H2. Gelation and aging: Pour the sol into the mold, seal it and place it at room temperature. The sol will gradually gel and turn into a gel state. After the gel is completed, continue to age in the mold for 24-48 hours to further consolidate and improve the internal structure.

[0012] H3. Surface modification: Take the aged gel out of the mold and soak it in a solution containing trimethylchlorosilane for 2-4 hours for surface modification. After the modification is completed, wash the gel with a solvent several times to remove the residual reagent on the surface, and then dry it to remove moisture and excess solvent.

[0013] H4. Adding nano-titanium dioxide: Disperse the nano-titanium dioxide in the solvent, and perform ultrasonic dispersion treatment for 30-60 minutes to make it uniformly dispersed. Then mix the treated nano-titanium dioxide dispersion with the dried aerogel, and perform ultrasonic treatment again for 15-30 minutes to ensure that the nano-titanium dioxide is uniformly distributed in the aerogel. Finally, perform secondary drying to obtain a silica aerogel that meets the requirements.

[0014] Preferably, the outer glass plate is made of either high-transmittance tempered glass or Low-E glass, and the inner glass plate is made of either high-transmittance tempered glass or Low-E glass.

[0015] Preferably, the sealing frame is used to seal the outer glass plate and the inner glass plate to form an airtight structure, and the spacer is arranged at the edge of the hollow layer, and the spacer is used to support and fix the distance between the outer glass plate and the inner glass plate.

[0016] Preferably, the hollow layer is located between the outer glass plate and the inner glass plate, the thickness of the hollow layer is 6 mm-20 mm, and the high-transmittance aerogel material is evenly filled in the hollow layer to form a continuous heat-insulating layer.

[0017] Preferably, the sealing frame is made of a high-strength aluminum alloy or a composite material, and the sealing frame is sealed with the outer glass plate and the inner glass plate by a double-layer sealant.

[0018] Preferably, the spacer bar is a warm edge spacer bar, the material of the spacer bar is stainless steel or a polymer composite material, a filling cavity is provided inside the spacer bar, and the desiccant is located inside the filling cavity.

[0019] Another technical problem to be solved by the present invention is to provide a method for preparing a high-transmittance aerogel-modified hollow glass curtain wall, comprising the following steps:

[0020] S1. Clean, dry and grind the edges of the outer glass plate and the inner glass plate;

[0021] S2. Fix the spacer strips to the edge of the outer glass plate and fill the spacer strips with desiccant;

[0022] S3, injecting high light transmittance aerogel material in liquid or gel state uniformly into the hollow layer, and making the aerogel material uniformly distributed through a vacuum process;

[0023] S4, align the inner glass plate with the spacer bar and preliminarily fix it through the sealing frame;

[0024] S5. Apply double layers of sealant between the sealing frame and the outer glass plate and the inner glass plate, and perform curing treatment;

[0025] S6. Conduct quality inspection on the finished curtain wall, including air tightness, thermal insulation and light transmittance tests.

[0026] Preferably, the high-transmittance aerogel material in S3 is made by vacuum infusion process, the aerogel material is evenly injected into the hollow layer, and the bubbles are removed by vacuuming to ensure the uniform distribution of the aerogel material. The double-layer sealant in S5 includes a first layer of butyl sealant and a second layer of polysulfide sealant or silicone sealant, and the curing time of the sealant is 24-48h.

[0027] Preferably, the air tightness test in S6 detects the air tightness of the hollow layer through an air pressure test or a helium leakage test, the thermal insulation performance test detects the heat transfer coefficient of the curtain wall through a heat flow meter method or a hot box method, and the transmittance test detects the transmittance of the curtain wall through a spectrophotometer to ensure that the transmittance is greater than 80%.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the present invention provides a high-transmittance aerogel-modified hollow glass curtain wall and a preparation method thereof, which has the following beneficial effects:

[0030] The high-transmittance aerogel-modified hollow glass curtain wall and its preparation method significantly improve the thermal insulation, light transmittance and sound insulation performance of the curtain wall by filling the hollow layer with high-transmittance aerogel material. The curtain wall has the characteristics of lightweight, energy-saving and environmental protection, excellent fire resistance, etc., and is suitable for the fields of high-rise buildings and energy-saving buildings. The preparation method includes the steps of glass plate pretreatment, spacer strip installation, aerogel filling, sealing treatment and post-treatment, etc. The process is simple and easy to realize industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-transmittance aerogel-modified hollow glass curtain wall of the present invention;

[0032] Figure 2 This is a three-dimensional schematic diagram of the first partial structure of a high-transmittance aerogel-modified hollow glass curtain wall of the present invention;

[0033] Figure 3 It is a schematic side view of the local structure of a high-transmittance aerogel-modified hollow glass curtain wall of the present invention;

[0034] Figure 4 This is a three-dimensional schematic diagram of a second partial structure of a high-transmittance aerogel-modified hollow glass curtain wall according to the present invention;

[0035] Figure 5 A high light transmittance aerogel modified hollow glass curtain wall of the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0036] Figure 6 A high light transmittance aerogel modified hollow glass curtain wall of the present invention Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0037] Figure 7 The present invention is a schematic flow chart of a method for preparing a high-transmittance aerogel-modified hollow glass curtain wall.

[0038] In the figure: 1 outer glass plate, 2 inner glass plate, 3 hollow layer, 4 sealing frame, 5 spacer strip. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention and the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-6, shown is a high-transmittance aerogel-modified hollow glass curtain wall provided by the first embodiment of the present invention, comprising an outer glass plate 1, an inner glass plate 2, a hollow layer 3, a sealing frame 4 and a spacer 5, wherein a high-transmittance aerogel material is arranged inside the hollow layer 3, and a desiccant is arranged inside the spacer 5.

[0041] Specifically, the high-transmittance aerogel material is silica aerogel, which has a transmittance greater than 80%, a thermal conductivity less than 0.015 W / m·K, and a density less than 0.003 g / cm 3 The desiccant is used to absorb moisture in the hollow layer. The overall heat transfer coefficient of the high-transmittance aerogel material is less than 1.0W / m 2 K, sound insulation performance is greater than 40dB.

[0042] Furthermore, the light transmittance of silica aerogel is greater than 80%, which can provide sufficient natural lighting for buildings, reduce the demand for lighting equipment, and thus reduce energy consumption. The thermal conductivity is less than 0.015W / m·K, which significantly reduces heat transfer, effectively reduces the cooling demand of buildings in summer and the heating demand in winter, and improves the overall energy saving effect of buildings. The density is less than 0.003g / cm 3 Aerogel material is very light, which reduces the load on the building structure and is particularly suitable for high-rise buildings and large-span buildings. The desiccant is used to absorb moisture in the hollow layer to prevent internal condensation, extend the service life of the curtain wall, and maintain its stable performance. The overall heat transfer coefficient is less than 1.0W / m 2 K, further enhances the thermal insulation performance of the curtain wall, reduces heat loss, improves the energy efficiency of the building, and has a sound insulation performance of more than 40dB, effectively blocking external noise and providing a quiet and comfortable environment indoors. It is particularly suitable for office and residential buildings in cities.

[0043] Specifically, the outer glass plate 1 is made of either high-transmittance tempered glass or Low-E glass, and the inner glass plate 2 is made of either high-transmittance tempered glass or Low-E glass.

[0044] Specifically, the sealing frame 4 is used to seal the outer glass plate and the inner glass plate to form an airtight structure to prevent external air, moisture and dust from entering the hollow layer 3, thereby ensuring the stability of the heat insulation, sound insulation and moisture-proof performance of the curtain wall. The spacer 5 is arranged at the edge of the hollow layer 3 to support and fix the distance between the outer glass plate 1 and the inner glass plate 2, thereby ensuring the uniform thickness of the hollow layer 3 and reducing the heat transfer through the edge.

[0045] Specifically, the hollow layer 3 is located between the outer glass plate 1 and the inner glass plate 2, the thickness of the hollow layer 3 is 6 mm-20 mm, and the high light transmittance aerogel material is evenly filled in the hollow layer 3 to form a continuous heat insulation layer.

[0046] Specifically, the sealing frame 4 is made of one of high-strength aluminum alloy or composite materials, has excellent pressure resistance and corrosion resistance, and is suitable for various climatic conditions. The sealing frame 4 and the outer glass plate 1 and the inner glass plate 2 are sealed with a double-layer sealant to enhance durability and weather resistance.

[0047] Specifically, the spacer 5 is a warm edge spacer, and the material of the spacer 5 is stainless steel or a polymer composite material. The stainless steel spacer has high strength and corrosion resistance, while the polymer composite material has a lower thermal conductivity, which further improves the thermal insulation performance. A filling cavity is provided inside the spacer 5, and a desiccant is located inside the filling cavity to prevent internal condensation and extend the service life of the curtain wall.

[0048] See also Figure 7 The second embodiment of the present invention provides a method for preparing a high-transmittance aerogel-modified hollow glass curtain wall, comprising the following steps:

[0049] S1, cleaning, drying and edge grinding of the outer glass plate 1 and the inner glass plate 2;

[0050] S2, fixing the spacer bar 5 to the edge of the outer glass plate 1, and filling the spacer bar 5 with a desiccant;

[0051] S3, injecting high light transmittance aerogel material in liquid or gel state uniformly into the hollow layer 3, and making the aerogel material uniformly distributed through a vacuum process;

[0052] S4, aligning the inner glass plate 2 with the spacer bar 5, and preliminarily fixing them through the sealing frame 4;

[0053] S5, applying a double layer of sealant between the sealing frame 4 and the outer glass plate 1 and the inner glass plate 2, and performing a curing process;

[0054] S6. Conduct quality inspection on the finished curtain wall, including air tightness, thermal insulation and light transmittance tests.

[0055] Specifically, the high-transmittance aerogel material in S3 adopts a vacuum infusion process to evenly inject the aerogel material into the hollow layer, and remove bubbles by vacuuming to ensure that the aerogel material is evenly distributed. The double-layer sealant in S5 includes a first layer of butyl sealant and a second layer of polysulfide sealant or silicone sealant. The curing time of the sealant is 24-48 hours.

[0056] Specifically, the air tightness test in S6 detects the air tightness of the hollow layer through air pressure test or helium leakage test, the thermal insulation performance test detects the heat transfer coefficient of the curtain wall through the heat flow meter method or hot box method, and the light transmittance test detects the light transmittance of the curtain wall through a spectrophotometer to ensure that the light transmittance is greater than 80%.

[0057] Example 3: Application of high-transmittance aerogel-modified hollow glass curtain wall in high-rise buildings. A high-rise office building uses a high-transmittance aerogel-modified hollow glass curtain wall. The curtain wall structure includes an outer layer of Low-E glass and an inner layer of tempered glass. The thickness of the hollow layer is 12 mm and is filled with silica aerogel.

[0058] Implementation effect:

[0059] 1) Thermal insulation performance: The overall heat transfer coefficient (U value) of the curtain wall is 0.8W / m 2 K, significantly reducing building energy consumption;

[0060] 2) Light transmittance: The light transmittance of the curtain wall reaches 85%, which provides sufficient indoor lighting and reduces lighting requirements;

[0061] 3) Sound insulation performance: The sound insulation performance is 45dB, which effectively blocks external noise and improves the comfort of the office environment.

[0062] Example 4: Application of high-transmittance aerogel-modified hollow glass curtain wall in a sun room. A residential sun room uses a high-transmittance aerogel-modified hollow glass curtain wall. The thickness of the hollow layer is 16 mm, filled with silica aerogel, and the sealing frame is made of high-strength aluminum alloy.

[0063] Implementation effect:

[0064] 1) Energy-saving effect: The curtain wall has low thermal conductivity, and has significant insulation effect in winter, reducing heating energy consumption;

[0065] 2) Light transmittance: The light transmittance of the curtain wall is 88%, and the sun room is bright, creating a comfortable leisure space;

[0066] 3) Durability: The sealing frame is treated with double-pass sealant, with excellent air tightness and waterproof performance and long service life.

[0067] Example 5: Application of high transmittance aerogel modified hollow glass curtain wall in energy-saving buildings. A green energy-saving building uses high transmittance aerogel modified hollow glass curtain wall, and the overall heat transfer coefficient (U value) of the curtain wall is 0.9W / m 2 K, sound insulation performance is 42dB.

[0068] Implementation effect:

[0069] 1) Environmental protection: Aerogel materials are non-toxic and harmless and meet green building standards;

[0070] 2) Energy saving: Curtain walls effectively reduce building energy consumption and meet the design requirements of energy-saving buildings;

[0071] 3) Multifunctionality: Curtain walls have functions such as heat insulation, sound insulation, and fire prevention, improving the overall performance of the building.

[0072] In summary, the high-transmittance aerogel-modified hollow glass curtain wall and its preparation method, by filling the hollow layer with high-transmittance aerogel material, significantly improve the thermal insulation performance, light transmittance and sound insulation performance of the curtain wall. The curtain wall has the characteristics of lightweight, energy-saving and environmental protection, excellent fire resistance, etc., and is suitable for the fields of high-rise buildings and energy-saving buildings. The preparation method includes the steps of glass plate pretreatment, spacer installation, aerogel filling, sealing treatment and post-treatment. The process is simple and easy to realize industrial production, which solves a series of problems existing in the existing hollow glass curtain wall: first, it mainly relies on hollow layer air or inert gas for insulation, and the thermal insulation performance is limited, and it is difficult to effectively block heat transfer in extreme climates; second, the structure is heavy, and multi-layer hollow glass will increase the load on the building structure; third, the sound insulation effect is limited, and the ability to isolate high-frequency noise is insufficient, and it cannot meet the high requirements of the acoustic environment; fourth, due to insufficient insulation, the building has high energy consumption in winter and summer.

[0073] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-transmittance aerogel-modified hollow glass curtain wall, comprising an outer glass plate (1), an inner glass plate (2), a hollow layer (3), a sealing frame (4) and a spacer (5), characterized in that: The hollow layer (3) is provided with a high light transmittance aerogel material inside, and the spacer bar (5) is provided with a desiccant inside.

2. The high-transmittance aerogel-modified hollow glass curtain wall according to claim 1, characterized in that: The high-transmittance aerogel material is a silicon dioxide aerogel, which includes the following components: 28% silicon source (ethyl orthosilicate), 2% catalyst (hydrochloric acid (HCl) solution), 65% solvent (anhydrous ethanol), 3% surface modifier (trimethylchlorosilane) and 2% nano titanium dioxide; The preparation process of the high light transmittance aerogel material comprises the following steps: H1. Mixing and stirring: first pour the solvent into the container according to the above ratio, then slowly add the silicon source, stir evenly, then add the catalyst, and continue stirring for 30-60 minutes to fully mix the solution and start the hydrolysis reaction to form a uniform sol system; H2. Gelation and aging: Pour the sol into the mold, seal it and place it at room temperature. The sol will gradually gel and turn into a gel state. After the gel is completed, continue to age in the mold for 24-48 hours to further consolidate and improve the internal structure. H3. Surface modification: Take the aged gel out of the mold and soak it in a solution containing trimethylchlorosilane for 2-4 hours for surface modification. After the modification is completed, wash the gel with a solvent several times to remove the residual reagent on the surface, and then dry it to remove moisture and excess solvent. H4. Adding nano-titanium dioxide: Disperse the nano-titanium dioxide in the solvent, and perform ultrasonic dispersion treatment for 30-60 minutes to make it uniformly dispersed. Then mix the treated nano-titanium dioxide dispersion with the dried aerogel, and perform ultrasonic treatment again for 15-30 minutes to ensure that the nano-titanium dioxide is uniformly distributed in the aerogel. Finally, perform secondary drying to obtain a silica aerogel that meets the requirements.

3. The high-transmittance aerogel-modified hollow glass curtain wall according to claim 1, characterized in that: The outer glass plate (1) is made of either high-transmittance tempered glass or Low-E glass, and the inner glass plate (2) is made of either high-transmittance tempered glass or Low-E glass.

4. The high-transmittance aerogel-modified hollow glass curtain wall according to claim 1, characterized in that: The sealing frame (4) is used to seal the outer glass plate and the inner glass plate to form an airtight structure. The spacer bar (5) is arranged at the edge of the hollow layer (3). The spacer bar (5) is used to support and fix the distance between the outer glass plate and the inner glass plate.

5. The high-transmittance aerogel-modified hollow glass curtain wall according to claim 1, characterized in that: The hollow layer (3) is located between the outer glass plate (1) and the inner glass plate (2); the thickness of the hollow layer (3) is 6 mm to 20 mm; and the high light transmittance aerogel material is evenly filled in the hollow layer (3) to form a continuous heat insulation layer.

6. The high-transmittance aerogel-modified hollow glass curtain wall according to claim 1, characterized in that: The sealing frame (4) is made of a high-strength aluminum alloy or a composite material, and the sealing frame (4) is sealed with the outer glass plate (1) and the inner glass plate (2) by a double-layer sealant.

7. The high-transmittance aerogel-modified hollow glass curtain wall according to claim 1, characterized in that: The spacer bar (5) is a warm edge spacer bar, the material of the spacer bar (5) is stainless steel or a polymer composite material, a filling cavity is provided inside the spacer bar (5), and the desiccant is located inside the filling cavity.

8. A method for preparing a high-transmittance aerogel-modified hollow glass curtain wall, characterized in that: A high-transmittance aerogel-modified hollow glass curtain wall according to any one of claims 1 to 7, comprising the following steps: S1, cleaning, drying and edge grinding the outer glass plate (1) and the inner glass plate (2); S2, fixing the spacer bar (5) to the edge of the outer glass plate (1), and filling the spacer bar (5) with a desiccant; S3, uniformly injecting aerogel material with high light transmittance into the hollow layer (3) in liquid or gel state, and uniformly distributing the aerogel material through a vacuum process; S4, aligning the inner glass plate (2) and the spacer bar (5), and preliminarily fixing them through the sealing frame (4); S5, applying a double layer of sealant between the sealing frame (4) and the outer glass plate (1) and the inner glass plate (2), and performing a curing process; S6. Conduct quality inspection on the finished curtain wall, including air tightness, thermal insulation and light transmittance tests.

9. The method for preparing a high-transmittance aerogel-modified hollow glass curtain wall according to claim 8, characterized in that: The high-transmittance aerogel material in S3 is evenly injected into the hollow layer by vacuum infusion technology, and bubbles are removed by vacuuming to ensure that the aerogel material is evenly distributed. The double-layer sealant in S5 includes a first layer of butyl sealant and a second layer of polysulfide sealant or silicone sealant. The curing time of the sealant is 24-48 hours.

10. The method for preparing a high-transmittance aerogel-modified hollow glass curtain wall according to claim 8, characterized in that: The air tightness test in S6 detects the air tightness of the hollow layer through an air pressure test or a helium leakage test, the thermal insulation performance test detects the heat transfer coefficient of the curtain wall through a heat flow meter method or a hot box method, and the light transmittance test detects the light transmittance of the curtain wall through a spectrophotometer to ensure that the light transmittance is greater than 80%.

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