Preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel

Abstract

The invention relates to the technical field of glass preparation methods, in particular to a preparation method of thermal-insulation energy-saving glass based on high-transparency and high-toughness aerogel, which comprises the following steps: stirring and mixing methanol and a methyl silicate silicon source to obtain a uniform mixed solution; adding alkoxy silane into the mixed solution, stirring and mixing, adding a catalyst after uniformly mixing, and continuously stirring and mixing to obtain mixed sol; after the sol-gel is mixed, adding an aging solution into the wet gel, aging for 48 hours at the temperature of 30 DEG C, and drying to obtain blocky aerogel; filling the blocky aerogel into a honeycomb plate and combining with laminated glass to obtain complete aerogel energy-saving glass; the thermal-insulation energy-saving glass prepared by the preparation method has the advantages of high light transmittance, high toughness and excellent thermal insulation effect, and solves the problem that the performance of the finally prepared energy-saving glass product is insufficient due to the fact that aerogel is easy to pulverize and settle in the existing aerogel preparation method.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass preparation method, and particularly relates to a preparation method of high-transparency and high-toughness aerogel thermal insulation energy-saving glass. BACKGROUND

[0002] With the development of science and technology, energy saving and emission reduction has become the current focus, but the building industry has high energy consumption, and the current building energy consumption accounts for about 43% of the total energy consumption, and in the building energy consumption, glass windows and daylighting roofs account for 50% of the total energy consumption, so it is of great significance to find a suitable material to prepare energy-saving glass for energy saving and emission reduction.

[0003] SiO2 aerogel has a three-dimensional network nanostructure, has low density, and has excellent thermal insulation performance, and is the preferred aerogel material in the current industry. Due to the nano-network structure, the aerogel has good thermal insulation performance, and can have a uniform and transparent appearance, so the aerogel is injected into vacuum glass to become aerogel energy-saving glass, which has good application prospect. However, the existing aerogel preparation method has the problems of easy powdering and sedimentation of aerogel, which leads to insufficient performance of the finally prepared energy-saving glass product. SUMMARY

[0004] The purpose of the present application is to provide a preparation method of high-transparency and high-toughness aerogel thermal insulation energy-saving glass, which aims to solve the problem of insufficient performance of the finally prepared energy-saving glass product due to the easy powdering and sedimentation of aerogel in the existing aerogel preparation method.

[0005] To achieve the above-mentioned purpose, the present application provides a preparation method of high-transparency and high-toughness aerogel thermal insulation energy-saving glass, comprising: stirring and mixing methanol and methyl silicate silicon source to obtain a uniform mixed solution; adding alkoxysilane to the mixed solution and stirring and mixing to make it uniform, then adding a catalyst, and continuously stirring and mixing to obtain a mixed sol; after the mixed sol is gelled, adding an aging liquid to the wet gel, and drying after aging at 30 DEG C for 48h to obtain a block aerogel; filling the block aerogel into a honeycomb plate and combining with laminated glass to obtain a complete aerogel energy-saving glass.

[0006] The mass ratio of the methanol, the methyl silicate silicon source and the alkoxysilane is 40:15-20:7-10.

[0007] In the step of stirring and mixing methanol and methyl silicate silicon source to obtain a uniform mixed solution, The stirring rate for mixing methanol and methyl silicate silicon source is 300 r / min or 350 r / min, and the stirring time is 10 min.

[0008] The specific steps for adding alkoxysilane to the mixed solution and stirring to achieve uniform mixing, followed by adding the catalyst and continuing stirring to obtain the mixed sol, include: Add alkoxysilane to the mixed solution, mix it evenly, stir at 300 r / min for 15 min, add the catalyst, and continue stirring for 10 min to obtain a mixed sol.

[0009] The methyl silicate silicon source is one or more of orthosilicate and polymethyl silicate.

[0010] The alkoxysilane is one or more of polydimethylsiloxane, dimethyldiethoxysilane, methyltrimethoxysilane, and methylpropyldiethoxysilane.

[0011] In the step of adding an aging solution to the wet gel after the mixed sol-gel has gelled, aging it at 30°C for 48 hours, and then drying it to obtain a block aerogel, the following steps are described. The drying process employs supercritical drying.

[0012] The catalyst is one or more of the following: alkaline catalyst, acidic catalyst, and fluoride catalyst.

[0013] The aging solution is a mixed solution of methanol and methyl orthosilicate.

[0014] The application discloses a preparation method of high-transparency and high-toughness aerogel thermal insulation energy-saving glass. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced.

[0016] Fig. 1 is a flow chart of the preparation method of the high-transparency and high-toughness aerogel thermal insulation energy-saving glass.

[0017] Fig. 2 is a comparison table of thermal conductivities of the composite materials prepared in examples 1-3 and comparative examples 1-3 of the application. DETAILED DESCRIPTION

[0018] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, the embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0019] Please refer to Figs. 1-2 The application provides a preparation method of high-transparency and high-toughness aerogel thermal insulation energy-saving glass, comprising the following steps: S1, methanol and methyl silicate silicon source are stirred and mixed to obtain a uniform mixed solution; In this step, the stirring rate of the stirring and mixing of the methanol and the methyl silicate type silicon source is 300 r / min or 350 r / min, and the stirring time is 10 min. The methyl silicate type silicon source is one or a combination of more than one of tetramethyl orthosilicate and polymethyl silicate. The methanol used in the method is self-made distilled methanol.

[0020] S2, the alkoxysilane is added to the mixed solution and stirred and mixed, and then a catalyst is added after uniform mixing, and stirring and mixing are continued to obtain a mixed sol; Specific steps include: adding alkoxysilane to the mixed solution, stirring for 15 min at 300 r / min after uniform mixing, adding a catalyst, and continuing to stir for 10 min to obtain a mixed sol. The mass ratio of the methanol, the methyl silicate type silicon source, and the alkoxysilane is 40:15-20:7-10. The alkoxysilane is one or a combination of more than one of polydimethylsiloxane, dimethyldiethoxysilane, methyltrimethoxysilane, and methylpropyldiethoxysilane. The catalyst is one or a combination of more than one of a basic catalyst, an acidic catalyst, and a fluoride catalyst.

[0021] S3, after the mixed sol-gel is obtained, an aging liquid is added to the wet gel, and drying is performed after aging at 30℃ for 48 h to obtain a block aerogel; In this step, the drying process uses supercritical drying. The aging liquid is a mixed solution of methanol and tetramethyl orthosilicate. The block aerogel obtained in this step is a high-toughness block aerogel.

[0022] S4, the block aerogel is filled into a honeycomb plate and combined with laminated glass to obtain a complete aerogel energy-saving glass.

[0023] In order to better understand the present application, three specific examples are used to illustrate the present application.

[0024] Example 1: A preparation method of high-transparency high-toughness aerogel thermal insulation energy-saving glass includes the following steps: S1, 40 parts of distilled methanol and 18 parts of tetramethyl orthosilicate are stirred at a speed of 350 r / min for 10 min at normal temperature and pressure to obtain a uniform mixed solution; S2, 6 parts of MTMS and 3 parts of DEMES are added to the mixed solution obtained in step S1, stirred for 15 min, then a catalyst is added, and stirring is continued for 15 min to obtain a mixed sol; S3, after waiting for the gel, a small amount of aging liquid is added to the wet gel, and drying is performed after aging at 30℃ for 48 h to obtain a block aerogel; S4, the block aerogel is filled into a honeycomb plate and combined with laminated glass to obtain a complete aerogel energy-saving glass.

[0025] Example 2: The preparation method of the high-transparency and high-toughness aerogel thermal insulation and energy-saving glass comprises the following steps: S1: Distilled methanol 40 parts, methyl polysilicate 18 parts were stirred at room temperature and normal pressure at a speed of 350 r / min for 10 min to obtain a uniform mixed solution; S2: MTMS 6 parts, DEMES 3 parts were added to the mixed solution obtained in step S1, stirred for 15 min, then a catalyst was added, and the stirring was continued for 15 min to obtain a mixed sol 2; S3: After waiting for the gelation, a small amount of aging liquid was added to the wet gel, and the gel was aged at 30°C for 48 h, then dried to obtain a block-shaped aerogel; S4: The aerogel block was filled into a honeycomb plate to combine with the laminated glass to obtain a complete aerogel energy-saving glass.

[0026] Example 3: The preparation method of the high-transparency and high-toughness aerogel thermal insulation and energy-saving glass comprises the following steps: S1: Distilled methanol 40 parts, methyl polysilicate 18 parts were stirred at room temperature and normal pressure at a speed of 350 r / min for 10 min to obtain a uniform mixed solution; S2: MTMS 9 parts were added to the mixed solution obtained in step S1, stirred for 15 min, then a catalyst was added, and the stirring was continued for 15 min to obtain a mixed sol; S3: After waiting for the gelation, a small amount of aging liquid was added to the wet gel, and the gel was aged at 30°C for 48 h, then dried to obtain a block-shaped aerogel; S4: The aerogel block was filled into a honeycomb plate to combine with the laminated glass to obtain a complete aerogel energy-saving glass.

[0027] Comparative Example: Comparative Example 1 and Example 1 differ in that the aerogel silicon source used is tetraethyl orthosilicate and MTES. Comparative Example 2 and Example 2 differ in that the traditional thermal insulation glass is used. Comparative Example 3 and Example 3 differ in that the filling method is direct filling into the glass cavity.

[0028] Thermal conductivity test of composite material: According to GB / T10295-2018 "Determination of thermal resistance and related properties of thermal insulation materials by heat flow meter method", the thermal conductivity of the composite materials prepared in Examples 1-3 and Comparative Examples 1-3 was detected. The experimental results are shown in Fig. 2 The results show that the filling method and the silicon source, alkyl siloxane have an important influence on the thermal insulation performance of the aerogel glass. Therefore, using methyl ester silicon source and alkyl siloxane as the silicon source can prepare high-transparency and high-toughness block-shaped aerogel, and using PMMA honeycomb plate filling and coating glass can obtain aerogel energy-saving glass with excellent performance.

[0029] The application discloses a preparation method of high-transparency and high-toughness aerogel thermal insulation energy-saving glass, and the method uses methyl silicate and alkyl silane as the main mixed silicon source, compared with a traditional single silicon source such as TESO for preparing aerogel, the methyl silicate source has better light transmittance and block forming effect, and the problems of insufficient light transmittance and easy breakage of the finished product are avoided. The application adds a small amount of alkyl siloxane as the silicon source for reaction, can effectively modify the gel network, introduces an alkyl modified skeleton, can make the aerogel block have excellent toughness and hydrophobicity, reduces the preparation time and cost, and can make the finished product have excellent block forming property and stability. The application fills the aerogel with honeycomb plates, can effectively divide the aerogel and avoid the aerogel from being deposited, and the honeycomb plates can further protect the integrity of the aerogel. The application adopts the PMMA honeycomb plate as the honeycomb plate, and the glass is coated glass, the PMMA material has good light transmittance, and can play a role in conducting the scattered light of the aerogel, can greatly increase the overall light flux, and the coating process can filter the radiation heat transfer, greatly improves the heat insulation effect of the energy-saving glass. The application selects the supercritical drying as the drying mode, the supercritical drying can greatly reduce the stress generated during drying, and avoids the skeleton collapse caused by the phase change stress during drying. The prepared thermal insulation energy-saving glass has the advantages of high light transmittance, high toughness and excellent heat insulation effect, and solves the problems of the existing aerogel preparation method, such as easy powderization of the aerogel, deposition, and performance defects of the finally prepared energy-saving glass product.

[0030] The above only discloses one or more preferred embodiments of the application, and cannot limit the scope of the application, and those skilled in the art can understand that all or part of the above-mentioned embodiments can be implemented, and equivalent changes made according to the claims of the application still belong to the scope of the application.

Claims

1. A method for preparing thermally insulating and energy-saving glass based on high-transparency and high-toughness aerogel, characterized in that, include: Methanol and methyl silicate silicon source are stirred and mixed to obtain a homogeneous mixed solution; Add alkoxysilane to the mixed solution and stir until homogeneous. Then add the catalyst and continue stirring to obtain a mixed sol. After the mixed sol-gel is gelled, an aging solution is added to the wet gel, and the mixture is aged at 30°C for 48 hours and then dried to obtain a block aerogel. By filling the honeycomb panel with block aerogel and combining it with laminated glass, a complete aerogel energy-saving glass is obtained.

2. The preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, The mass ratio of the methanol, the methyl silicate silicon source, and the alkoxysilane is 40:15-20:7-10.

3. The preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, In the step of stirring and mixing methanol and methyl silicate-based silicon sources to obtain a homogeneous mixed solution... The stirring rate for mixing methanol and methyl silicate silicon source is 300 r / min or 350 r / min, and the stirring time is 10 min.

4. The preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, The specific steps for adding alkoxysilane to the mixed solution and stirring to ensure uniform mixing, followed by adding the catalyst and continuing stirring to obtain the mixed sol, include: Add alkoxysilane to the mixed solution, mix it evenly, stir at 300 r / min for 15 min, add the catalyst, and continue stirring for 10 min to obtain a mixed sol.

5. The preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, The methyl silicate silicon source is one or more of orthosilicate and polymethyl silicate.

6. The preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, The alkoxysilane is one or more of polydimethylsiloxane, dimethyldiethoxysilane, methyltrimethoxysilane, and methylpropyldiethoxysilane.

7. The method for preparing heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, After the mixed sol-gel is formed, an aging solution is added to the wet gel, and the mixture is aged at 30°C for 48 hours and then dried to obtain a block aerogel. The drying process employs supercritical drying.

8. The preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, The catalyst is one or more of the following: alkaline catalyst, acidic catalyst, and fluoride catalyst.

9. The preparation method of heat-insulating and energy-saving glass based on high-transparency and high-toughness aerogel as described in claim 1, characterized in that, The aging solution is a mixed solution of methanol and methyl orthosilicate.

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