Organic-inorganic hybrid adhesive, preparation method and application of organic-inorganic hybrid adhesive in aerogel heat insulation felt

Abstract

The invention relates to the technical field of adhesives, and discloses an organic-inorganic hybrid adhesive, a preparation method and application of the organic-inorganic hybrid adhesive in aerogel heat insulation felts.The preparation method specifically comprises the steps that a mono-epoxy hepta (methoxyphenyl phthalazinone) POSS type connecting agent is synthesized and used for conducting modification treatment on silicon dioxide with the surface rich in hydroxyl, and then the modified silicon dioxide is obtained; the preparation method comprises the following steps: preparing nano silicon dioxide particles containing a methoxyphenyl phthalazinone POSS (Polyhedral Oligomeric Silsesquioxane) functional group; the preparation method comprises the following steps: compounding nano silicon dioxide particles containing methoxyphenyl phthalazinone POSS-based functional groups with an organic component phenolic resin on the basis of a pi-pi accumulation effect between benzene rings, so as to prepare the organic-inorganic hybrid adhesive; the glass fiber felt with excellent high temperature resistance is prepared by taking the organic-inorganic hybrid adhesive as an adhesive of chopped glass fibers, and can be used as a reinforcing material in the aerogel heat insulation felt, so that the prepared aerogel heat insulation felt shows excellent heat insulation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesives, in particular to an organic-inorganic hybrid adhesive, a preparation method and application thereof in aerogel insulation felt. Background Art

[0002] Glass fiber mat (glass fiber mat) is a kind of felt-like non-woven fabric made from glass fiber through processes such as needling and bonding. It is widely used in the fields of thermal insulation, filtration, and reinforced composite materials. Aerogel insulation mat is a non-woven thermal insulation material made by composite process with nano-aerogel as the main material and some fiber materials (such as glass fiber and ceramic fiber) as reinforcement.

[0003] Adhesives in fiberglass mats serve to bond fibers, enhance mechanical properties, improve durability, and perform other functional functions. Acrylic resins are commonly used as organic adhesives for fiberglass mats. While acrylic resins offer significant advantages such as strong weather resistance and fast curing, their temperature resistance is very limited. Summary of the Invention

[0004] The present invention effectively combines the high bonding strength of organic materials and the high-temperature resistance of inorganic materials, and independently develops a new organic-inorganic hybrid adhesive with the technical advantages of high bonding strength and excellent high-temperature resistance. The prepared glass fiber felt is used as the skeleton material of aerogel insulation felt, which significantly improves the thermal insulation performance of the composite material.

[0005] An organic-inorganic hybrid adhesive comprises the following raw materials in parts by weight:

[0006] 80-120 parts of phenolic resin;

[0007] 15-25 parts of silicon dioxide powder;

[0008] 3-8 parts of monoepoxy heptathiazinone-based POSS type linker.

[0009] A method for preparing an organic-inorganic hybrid adhesive comprises the following steps:

[0010] Based on the hydroxyl-epoxy ring-opening reaction mechanism, the surface-rich hydroxyl-containing nano-silica particles were modified using a monoepoxy heptakis(methoxyphenylphthalazinone) POSS-type linker to obtain nano-silica particles containing methoxyphenylphthalazinone POSS-based functional groups.

[0011] The inorganic component silica and the organic component phenolic resin are compounded by the π-π stacking effect between the phthalazinone group and the methoxyphenyl group on the surface of the nano-silica particles containing the methoxyphenylphthalazinone POSS functional group and the phenyl group rich in the molecular main chain of the phenolic resin, thereby obtaining an organic-inorganic hybrid adhesive.

[0012] Preferably, the preparation method of the monoepoxy heptakis(methoxyphenylphthalazinone) POSS type linker is:

[0013] The NH group of 4-(4-methoxyphenyl)-1-(2H)-phthalazinone reacts with the chlorine functional group of octachloropropylsilsesquioxane through a nucleophilic substitution reaction, and the molar ratio of 4-(4-methoxyphenyl)-1-(2H)-phthalazinone and octachloropropylsilsesquioxane participating in the reaction is controlled to be (8.1-8.9):1 to generate intermediate a;

[0014] Intermediate b was synthesized by the vertex-opening method using intermediate a as raw material and tetraethylammonium hydroxide as an opening reagent;

[0015] Monoepoxy heptakis(methoxyphenylphthalazinone) POSS-type linker was synthesized by vertex-capping method using intermediate b as raw material and 3-(2,3-epoxypropoxy)propyltrimethoxysilane as capping reagent.

[0016] The organic-inorganic hybrid adhesive prepared according to the above method is used as a binder for glass fiber mat to prepare a glass fiber mat containing the organic-inorganic hybrid adhesive.

[0017] Preferably, the preparation method of the glass fiber mat is:

[0018] Evenly dissolving 5-10 parts by weight of an organic-inorganic hybrid adhesive and 0.3-1.5 parts by weight of a curing agent in N,N-dimethylformamide to obtain an organic-inorganic hybrid adhesive mixture;

[0019] 45-55 parts by weight of chopped glass fibers and 1-5 parts by weight of carboxymethyl cellulose dispersant are uniformly dissolved in deionized water, first dehydrated using a filter to form a wet felt, and then vacuum dehydrated to further remove moisture and compact the fibers to obtain a crude glass fiber felt; the crude glass fiber felt is immersed in a mixed solution of an organic-inorganic hybrid adhesive and kept fully soaked for 1-3 hours, then taken out and placed in an oven for an adhesive curing process to obtain a glass fiber felt.

[0020] The glass fiber mat prepared by the organic-inorganic hybrid adhesive is used as a reinforcing material in an aerogel thermal insulation mat, and an aerogel thermal insulation mat containing the organic-inorganic hybrid adhesive is prepared.

[0021] Preferably, the preparation method of the aerogel insulation felt is:

[0022] 0.5-2 parts by volume of water glass and 2.5-4 parts by volume of deionized water are mixed and stirred evenly, the pH is adjusted to 7.5, 0.1-0.5 parts by volume of formamide are added and stirred evenly to obtain a silica sol; a glass fiber felt is immersed in the silica sol and freeze-dried to obtain an aerogel insulation felt.

[0023] Preferably, the curing agent is one of hexamethyltetraammonium, ammonium chloride and ammonium sulfate;

[0024] Preferably, the curing parameters of the adhesive curing process are set as: curing temperature 170-200° C., and curing time 20-30 min.

[0025] Preferably, the process parameters of the freeze-drying treatment are set as: pre-freezing at -55°C to -30°C for 1-2 hours, and drying at a vacuum degree of 10-100 Pa in the freeze-drying chamber of a vacuum freeze dryer for 36-72 hours.

[0026] Beneficial effects:

[0027] The invention first designs and synthesizes a monoepoxy heptakis(methoxyphenylphthalazinone) POSS type linker, and based on the hydroxyl-epoxy ring-opening reaction mechanism, uses the monoepoxy heptakis(methoxyphenylphthalazinone) POSS type linker to modify nano-silica particles rich in hydroxyl groups on the surface to obtain nano-silica particles containing methoxyphenylphthalazinone POSS functional groups. Then, the phthalazinone groups and methoxyphenyl groups on the surfaces of the nano-silica particles containing methoxyphenylphthalazinone POSS functional groups react with the phenyl groups rich in the main chain of the phenolic resin to compound the high-temperature resistant inorganic component silica with the high-bonding strength organic component phenolic resin to obtain an organic-inorganic hybrid adhesive.

[0028] Glass fiber mats prepared by using an organic-inorganic hybrid adhesive as a binder for chopped glass fibers have achieved significant improvements in high-temperature resistance compared to glass fiber mats prepared with commercial phenolic resin and acrylic adhesives.

[0029] The glass fiber felt prepared using an organic-inorganic hybrid adhesive is used as a reinforcing material in aerogel insulation felt. The aerogel insulation felt prepared in this way has a lower thermal conductivity and a larger insulation temperature difference than aerogel insulation felt made based on commercial phenolic resin adhesives and acrylic adhesives, and can be used as a good insulation material. DETAILED DESCRIPTION

[0030] Example 1:

[0031] An organic-inorganic hybrid adhesive I comprises the following raw materials in parts by weight:

[0032] 100 parts of phenolic resin (purchased from Jinan Shanhai Chemical Technology Co., Ltd., brand 2402);

[0033] 20 parts of silicon dioxide powder (purchased from Beijing Zhongke Keyou Technology Co., Ltd., specification: particle size 20-50nm)

[0034] 5 parts of monoepoxy heptakis(methoxyphenylphthalazinone) POSS type linker;

[0035] Wherein, the preparation process of monoepoxy heptapholazine-based POSS type linker is as follows:

[0036] Step 1: The NH group of 4-(4-methoxyphenyl)-1-(2H)-phthalazinone undergoes a nucleophilic substitution reaction with the chlorine functional group of octachloropropylsilsesquioxane, and the molar ratio of 4-(4-methoxyphenyl)-1-(2H)-phthalazinone and octachloropropylsilsesquioxane participating in the reaction is controlled to be 8.5:1 to generate intermediate a, whose chemical structure is:

[0037]

[0038] Step 2: Using intermediate a as raw material and tetraethylammonium hydroxide as an opening reagent, intermediate b is synthesized by the vertex-opening method. Its chemical structure is:

[0039]

[0040] Step 3: Using intermediate b as raw material and 3-(2,3-epoxypropoxy)propyltrimethoxysilane as capping agent, a monoepoxy heptakis(methoxyphenylphthalazinone) POSS type linker is synthesized by the vertex-capping method, and its chemical structure is:

[0041]

[0042] The specific experimental steps for preparing the monoepoxy heptathiazinone-based POSS linker are as follows:

[0043] Under nitrogen protection, 2.6 g of octachloropropylsilsesquioxane and 30 mL of anhydrous tetrahydrofuran were added to a three-necked flask and stirred at room temperature until completely dissolved. Then, 50 mL of anhydrous tetrahydrofuran solution containing 5.4 g of 4-(4-methoxyphenyl)-1-(2H)-phthalazinone and 4.8 mL of triethylamine were added dropwise to the three-necked flask. The temperature was raised to 75 ° C. and stirred under reflux for 10 h. The mixture was cooled to room temperature, the solvent was removed by rotary evaporation, and the mixture was dried in vacuo to obtain intermediate a.

[0044] 4.6 g of intermediate a and 80 mL of anhydrous tetrahydrofuran were added to a three-necked flask and stirred at room temperature until completely dissolved. Then, 5.0 mL of a 35 wt% tetraethylammonium hydroxide aqueous solution was added to the three-necked flask, the temperature was raised to 65° C., stirred and refluxed for 5 h, cooled to room temperature, the pH was adjusted to neutral with 0.1 mol / L dilute hydrochloric acid, tetrahydrofuran was removed by rotary evaporation, and the solution was dissolved in ether, dried with anhydrous magnesium sulfate, filtered, and the ether was removed by rotary evaporation. The solution was dried in vacuum to obtain intermediate b.

[0045] Under nitrogen protection, 3.1 g of intermediate b and 50 mL of anhydrous tetrahydrofuran were added to a three-necked flask and stirred at room temperature until completely dissolved. The mixture was then placed in an ice-water bath. 0.6 mL of 3-(2,3-epoxypropoxy)propyltrimethoxysilane was added dropwise to the three-necked flask. The mixture was stirred in an ice-water bath for 40 min, and the ice-water bath was removed. The mixture was stirred at room temperature for 8 h. The solvent was removed by rotary evaporation, concentrated to a saturated solution, and dried in vacuo to obtain a monoepoxy heptadecanoyl (methoxyphenylphthalazinone) POSS-type linker.

[0046] The nuclear magnetic resonance hydrogen spectrum of the monoepoxy heptakis (methoxyphenyl phthalazinone) POSS type linker is characterized as follows: 1 HNMR (CDCl3, 400MHz) δ: 0.65-0.68 (t, 2H), 0.71-0.74 (t, 14H), 1.65-1.72 (m, 2H), 1.82-1.89 (m, 14H), 3.23 -3.25(d, 2H), 3.39-3.43(t, 2H), 3.49-3.54(m, 3H), 3.79(s, 21H), 3.96-4.00(t, 14H), 7.01-8.30(m, 56H).

[0047] The preparation method of organic-inorganic hybrid adhesive I comprises the following steps:

[0048] Step 1: preparing nano-silica particles containing methoxyphenylphthalazinone-based POSS functional groups: using a monoepoxy seven (methoxyphenylphthalazinone-based) POSS type linker to modify the nano-silica particles rich in hydroxyl groups on the surface, specifically by the epoxy functional group of the monoepoxy seven (methoxyphenylphthalazinone-based) POSS type linker and the hydroxyl functional group on the silica surface to produce an epoxy ring-opening reaction, thereby preparing nano-silica particles containing methoxyphenylphthalazinone-based POSS functional groups, The specific experimental steps are as follows: 2 g of silica powder and 100 mL of anhydrous tetrahydrofuran are added to a three-necked flask, ultrasonically dispersed for 30 minutes, then 0.5 g of a monoepoxy heptakis(methoxyphenylphthalazinone) POSS-type linker and 1.2 mL of triethylamine are added to the three-necked flask in sequence, the temperature is raised to 70° C., stirred and refluxed for 6 hours, cooled to room temperature, centrifuged, and repeatedly centrifuged and washed with anhydrous ethanol and deionized water in sequence, and vacuum dried to obtain nano-silica particles containing phthalazinone POSS-based functional groups;

[0049] Step 2, preparing an organic-inorganic hybrid adhesive I: the phthalazinone group and methoxyphenyl contained on the surface of the nano-silica particles containing a methoxyphenylphthalazinone POSS-based functional group undergo a π-π stacking effect with the phenyl rich in the molecular main chain of the phenolic resin, and the inorganic component silica and the organic component phenolic resin are compounded to prepare an organic-inorganic hybrid adhesive I. The specific experimental steps are: 10g of phenolic resin and 150mL of N,N-dimethylformamide are added to a beaker, the temperature is raised to 80°C and stirred until completely dissolved, then 2.5g of nano-silica particles containing a methoxyphenylphthalazinone POSS-based functional group are added to the beaker, the reaction is stirred at 80°C for 4h, the solvent is removed by rotary evaporation, and the mixture is vacuum dried at 120°C for 10h to obtain an organic-inorganic hybrid adhesive I.

[0050] The application of organic-inorganic hybrid adhesive I includes the following steps:

[0051] Step 1: Prepare an organic-inorganic hybrid adhesive I mixed solution: add 6.5 g of organic-inorganic hybrid adhesive I and 100 mL of N,N-dimethylformamide to a beaker, heat to 80°C and stir until completely dissolved, cool to room temperature, add 5 mL of N,N-dimethylformamide solution containing 0.8 g of ammonium sulfate to the beaker, stir for 10 minutes to mix evenly, and obtain an organic-inorganic hybrid adhesive I mixed solution;

[0052] Step 2, preparing glass fiber mat I: 50g of chopped glass fiber (purchased from Hebei Wensheng New Material Technology Co., Ltd., specification: diameter 7-10mm) and 3g of carboxymethyl cellulose dispersant were added to 100mL of deionized water, stirred at room temperature for 30min to disperse evenly, first dehydrated with a filter to form a wet mat, and then vacuum dehydrated to further remove water and compact the fibers to obtain a crude glass fiber mat; the crude glass fiber mat was immersed in the organic-inorganic hybrid adhesive I mixed solution prepared in step 1, kept fully infiltrated for 2h, taken out and placed in an oven for adhesive curing, the curing temperature was 180°C, and the curing time was 25min to obtain glass fiber mat I;

[0053] Step three, prepare aerogel insulation felt I: mix 1 volume part of water glass (purchased from Zibo Ruihe New Materials Co., Ltd., with an active ingredient content of 95%) and 3 volume parts of deionized water, adjust the pH to 7.5 with 0.5 mol / mL ammonia water, then add 0.2 volume parts of formamide, stir at room temperature for 15 minutes to obtain silica sol; soak the glass fiber felt I prepared in step two in the medium so that the silica sol completely covers the glass fiber felt I to ensure that the fiber is fully infiltrated, ultrasonically treat for 30 minutes, pre-freeze at -40°C for 1.5 hours, and then dry at a vacuum degree of 80 Pa in the freeze-drying chamber of a vacuum freeze dryer for 48 hours to obtain aerogel insulation felt I.

[0054] Example 2:

[0055] An organic-inorganic hybrid adhesive II comprises the following raw materials in parts by weight: 80 parts of phenolic resin, 20 parts of silicon dioxide, and 5 parts of a monoepoxy heptakis(methoxyphenylphthalazinone) POSS-type linker;

[0056] Referring to the preparation method of organic-inorganic hybrid adhesive I, organic-inorganic hybrid adhesive II was prepared;

[0057] Referring to the application method of organic-inorganic hybrid adhesive Ⅰ, glass fiber felt Ⅱ and aerogel insulation felt Ⅱ were prepared.

[0058] Example 3:

[0059] An organic-inorganic hybrid adhesive III comprises the following raw materials in parts by weight: 120 parts of phenolic resin, 20 parts of silicon dioxide, and 5 parts of a monoepoxy heptakis(methoxyphenylphthalazinone) POSS-type linker;

[0060] Referring to the preparation method of organic-inorganic hybrid adhesive I, organic-inorganic hybrid adhesive III was prepared;

[0061] Referring to the application method of organic-inorganic hybrid adhesive I, glass fiber felt III and aerogel insulation felt III were prepared.

[0062] Comparative Example 1:

[0063] Referring to the preparation method of glass fiber mat I, glass fiber mat a was prepared, the only difference being that an acrylic adhesive (brand: Fulecosin, model: AT-2010) was used instead of the organic-inorganic hybrid adhesive I;

[0064] Aerogel thermal insulation felt a was prepared by referring to the preparation method of aerogel thermal insulation felt I, the only difference being that glass fiber felt a was used to replace glass fiber felt I.

[0065] Comparative Example 2:

[0066] Glass fiber mat b was prepared by referring to the preparation method of glass fiber mat I, with the only difference being that phenolic resin (purchased from Jinan Shanhai Chemical Technology Co., Ltd., brand 2402) was used to replace the organic-inorganic hybrid adhesive I.

[0067] Referring to the preparation method of aerogel insulation felt I, aerogel insulation felt b was prepared, the only difference being that glass fiber felt b was used to replace glass fiber felt I.

[0068] Performance testing:

[0069] 1. Test the high temperature resistance of glass fiber mat. The specific test steps are as follows: Use STA 509 NETZSCH synchronous thermal analyzer to test the high temperature resistance of the sample;

[0070] Detection atmosphere: air;

[0071] Detection flow rate: 50L / min;

[0072] Sample dish: alumina ceramic crucible;

[0073] Temperature program: heating from 30°C to 800°C at a rate of 10°C / min, recording the thermal decomposition temperature and thermal decomposition enthalpy of the sample;

[0074] The above experimental results are shown in Table 1 below;

[0075] Table 1 Experimental results of high temperature resistance of glass fiber mat

[0076]

[0077]

[0078] From the performance test results in Table 1, the following conclusion can be drawn: the glass fiber mat prepared by using the independently developed organic-inorganic hybrid adhesive in the present invention has a significantly increased thermal decomposition temperature and a significantly reduced thermal decomposition enthalpy compared to the glass fiber mat prepared by commercial phenolic resin and acrylic adhesive. While significantly improving the high-temperature resistance of the product during use, it can significantly reduce the heat generated by the product decomposition at high temperatures.

[0079] 2. Thermal insulation performance test of aerogel insulation felt:

[0080] Sample size: 100mm×100mm, thickness 1.1-1.3mm;

[0081] A thermocouple is attached to the upper and lower sides of the sample to record the temperature of the hot and cold surfaces during the test;

[0082] Heating table size: 100mm×100mm, set the heating table temperature to 470℃;

[0083] Place the sample on the heating table and set the pressure to 0.7 MPa. After heating for 2 minutes, turn off the heating switch and stop pressurizing. Keep the sample in the compressed state and cool it naturally. Record the temperature of the hot and cold surfaces during the entire test.

[0084] The temperature difference between the hot and cold surfaces when the cold surface is at its peak temperature is used as the criterion for judging the thermal insulation performance. The larger the thermal insulation temperature difference, the better the thermal insulation performance.

[0085] 3. Thermal conductivity test of aerogel insulation felt:

[0086] (1) Thermal conductivity test at 25℃:

[0087] The thermal conductivity of the sample was tested at 25°C using the HFM 510A heat flow method thermal conductivity instrument according to GB / T 10295-2008 "Determination of steady-state thermal resistance and related properties of insulation materials - Heat flow meter method";

[0088] Sample size: 200mm×200mm, stacking thickness>6mm, hot surface temperature 35℃, cold surface temperature 15℃, test pressure 80N;

[0089] (2) High temperature thermal conductivity test:

[0090] The high-temperature thermal conductivity coefficient of the sample was tested using a GYDR-3030 guarded hot plate thermal conductivity instrument in accordance with GB / T 10294-2008 "Determination of steady-state thermal resistance and related properties of insulating materials - Guarded hot plate method";

[0091] Sample size: diameter 200mm, stacking thickness> 20mm, set the test condition to 500℃;

[0092] The above experimental results are shown in Table 2 below;

[0093] Table 2 Performance test results of aerogel insulation felt

[0094]

[0095] From the performance test results in Table 2, the following conclusion can be drawn: compared with aerogel insulation felts made based on commercial phenolic resin adhesives and acrylic adhesives, aerogel insulation felts made by using glass fiber mats made from organic-inorganic hybrid adhesives as reinforcing materials in aerogel insulation felts have lower thermal conductivity and larger insulation temperature difference. Therefore, it can be seen that the aerogel insulation felts prepared by the present invention can be used as good thermal insulation materials.

Claims

1. An organic-inorganic hybrid adhesive, characterized in that: The composition comprises the following raw materials in parts by weight: 80-120 parts of phenolic resin; 15-25 parts of silicon dioxide powder; 3-8 parts of a monoepoxy heptathiazinone-based POSS linker, having the chemical structural formula:

2. The method for preparing an organic-inorganic hybrid adhesive according to claim 1, characterized in that: The following steps are involved: Based on the hydroxyl-epoxy ring-opening reaction mechanism, the surface-rich hydroxyl-containing nano-silica particles were modified using a monoepoxy heptakis(methoxyphenylphthalazinone) POSS-type linker to obtain nano-silica particles containing methoxyphenylphthalazinone POSS-based functional groups. The inorganic component silica and the organic component phenolic resin are compounded by the π-π stacking effect between the phthalazinone group and the methoxyphenyl group on the surface of the nano-silica particles containing the methoxyphenylphthalazinone POSS functional group and the phenyl group rich in the molecular main chain of the phenolic resin, thereby obtaining an organic-inorganic hybrid adhesive.

3. The method for preparing an organic-inorganic hybrid adhesive according to claim 2, characterized in that: The preparation method of the monoepoxy heptapholazine-based POSS type linker is as follows: The NH group of 4-(4-methoxyphenyl)-1-(2H)-phthalazinone reacts with the chlorine functional group of octachloropropylsilsesquioxane through a nucleophilic substitution reaction, and the molar ratio of 4-(4-methoxyphenyl)-1-(2H)-phthalazinone and octachloropropylsilsesquioxane participating in the reaction is controlled to be (8.1-8.9):1 to generate intermediate a; Intermediate b was synthesized by the vertex-opening method using intermediate a as raw material and tetraethylammonium hydroxide as an opening reagent; Monoepoxy heptakis(methoxyphenylphthalazinone) POSS-type linker was synthesized by vertex-capping method using intermediate b as raw material and 3-(2,3-epoxypropoxy)propyltrimethoxysilane as capping reagent.

4. The use of an organic-inorganic hybrid adhesive according to any one of claims 1 to 3, characterized in that: The organic-inorganic hybrid adhesive is used as a binder for glass fiber mat to prepare a glass fiber mat containing the organic-inorganic hybrid adhesive.

5. The use of an organic-inorganic hybrid adhesive according to claim 4, characterized in that: The preparation method of the glass fiber mat containing the organic-inorganic hybrid adhesive is as follows: Evenly dissolving 5-10 parts by weight of an organic-inorganic hybrid adhesive and 0.3-1.5 parts by weight of a curing agent in N,N-dimethylformamide to obtain an organic-inorganic hybrid adhesive mixture; 45-55 parts by weight of chopped glass fibers and 1-5 parts by weight of carboxymethyl cellulose dispersant are uniformly dissolved in deionized water, first dehydrated using a filter to form a wet felt, and then vacuum dehydrated to further remove moisture and compact the fibers to obtain a crude glass fiber felt; the crude glass fiber felt is immersed in a mixed solution of an organic-inorganic hybrid adhesive and kept fully soaked for 1-3 hours, then taken out and placed in an oven for an adhesive curing process to obtain a glass fiber felt.

6. The use of an organic-inorganic hybrid adhesive according to claim 5, characterized in that: The curing agent is one of hexamethyltetraammonium, ammonium chloride and ammonium sulfate.

7. The use of an organic-inorganic hybrid adhesive according to claim 5, characterized in that: The curing parameters of the adhesive curing process are set as: curing temperature 170-200° C., and curing time 20-30 min.

8. The use of an organic-inorganic hybrid adhesive according to claim 4, characterized in that: The glass fiber mat prepared by the organic-inorganic hybrid adhesive is used as a reinforcing material in an aerogel thermal insulation mat, and an aerogel thermal insulation mat containing the organic-inorganic hybrid adhesive is prepared.

9. The use of an organic-inorganic hybrid adhesive according to claim 8, characterized in that: The preparation method of the aerogel thermal insulation felt containing the organic-inorganic hybrid adhesive is as follows: 0.5-2 parts by volume of water glass and 2.5-4 parts by volume of deionized water are mixed and stirred evenly, the pH is adjusted to 7.5, 0.1-0.5 parts by volume of formamide are added and stirred evenly to obtain a silica sol; a glass fiber felt is immersed in the silica sol and freeze-dried to obtain an aerogel insulation felt.

10. The use of an organic-inorganic hybrid adhesive according to claim 9, characterized in that: The process parameters of the freeze-drying treatment are set as: pre-freezing at -55°C to -30°C for 1-2 hours, and drying at a vacuum degree of 10-100 Pa in the freeze-drying chamber of a vacuum freeze dryer for 36-72 hours.

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