A high-efficiency window fire curtain and its preparation method and application

Abstract

The present invention discloses a high-efficiency window fire curtain and its preparation method and application, belonging to the technical field of window fire curtain. The high-efficiency window fire curtain provided by the present invention has strong heat insulation and good fireproof performance; it is light and easy to deploy, and only needs to be attached to the glass of the window when a fire occurs, and can be tightly attached to the glass under high-temperature baking of the fire; the surface fireproof and heat-insulating modified layer contains a variety of flame-retardant modified elements of fireproof structure, and under the impact of butane spray gun flame, the integrity of the fire curtain and the window can be maintained; because the surface fireproof and heat-insulating modified layer coated on the surface of the high-efficiency window fire curtain contains fireproof elements such as silicon and boron, a carbon layer product can be generated after the surface is burned, and it can effectively adhere to the glass surface, which can effectively prevent the fire curtain from falling off in a fire; the preparation method of the high-efficiency window fire curtain provided is simple and easy to operate, environmentally friendly, does not use toxic and harmful raw materials, and does not generate toxic and harmful substances, and there are no safety hazards during use.

Description

Technical Field

[0001] The invention relates to the technical field of window fire curtains, and in particular to a high-efficiency window fire curtain and a preparation method and application thereof. Background Art

[0002] Building windows are vulnerable areas when fire occurs. Whether it is a fire at the border between forest and town or a fire on the facade of a building, flying fire and heat radiation will cause the windows of the building to break, which will then spread into the building, causing internal combustibles to catch fire, resulting in a large loss of life and property. Therefore, when a fire occurs at the border between forest and town or a fire on the facade of a building, it is very important to quickly implement emergency protection for windows.

[0003] In some building scenarios, fireproof glass is installed to effectively prevent fire from entering the room through windows. However, the glass used in most buildings is ordinary tempered glass, and ordinary float glass is even used in buildings in remote areas. Traditional flame-retardant curtains are made of flame-retardant fabrics, which can slow down the burning behavior of the curtains themselves when a fire occurs, and have a general fireproof and heat-insulating effect on windows. By preparing a composite gas window fire curtain for fire emergency fire prevention, it can be effectively used for emergency fire prevention, and can provide additional protection when a fire occurs, preventing windows from breaking and preventing the spread of fire.

[0004] Glass fiber toughened SiO 2 Aerogel has excellent high-temperature thermal stability, thermal insulation and weather resistance, and is an ideal material for preparing fire curtains. At the same time, it has a very low density and high strength and toughness, and can be used to manufacture lightweight structural materials for emergency use. In addition, compared with other similar products, the price of glass fiber toughened silica aerogel is relatively low, with a high cost performance. 2 Aerogel has a temperature resistance of 650°C, which is much lower than the high temperature of 1000°C in forest-town interface areas and building facade fires. Summary of the invention

[0005] The purpose of the present invention is to provide a high-efficiency window fire curtain and its preparation method and application, so as to solve the problem that in forest-town interface fires and building facade fires, the glass has poor high-temperature thermal stability and fireproof and heat-insulating properties, is very easy to break, and causes the fire to spread rapidly to the room, causing huge losses to people's lives and property.

[0006] To achieve the above object, the present invention provides a high-efficiency window fire curtain, which is composed of three layers, the middle layer of which is glass fiber toughened SiO 2 Aerogel, both sides of the middle layer are surface fireproof and heat-insulating modified layers.

[0007] Preferably, the method for preparing the surface fireproof and heat-insulating modified layer comprises the following steps:

[0008] S1. Reflux 3-aminopropyldiethoxymethylsilane and deionized water at 90°C for 6 hours, and distill under reduced pressure to obtain a colorless viscous liquid product;

[0009] S2, dissolving the prepared colorless viscous liquid product in anhydrous ethanol, and then adding dropwise to an anhydrous ethanol solution of diphenylphosphoric acid, continuing the reaction for 12 hours after the dropwise addition is complete, removing the ethanol, and obtaining a colorless solid product;

[0010] S3. Dissolve boric acid in isopropanol, add the colorless solid product prepared in S2 to the obtained solution, mix well, stir under heating and stirring conditions for 30 min, and then heat the mixture to 105° C. to obtain a viscous solution.

[0011] Preferably, the mass ratio of 3-aminopropyldiethoxymethylsilane to deionized water in S1 is 3-4:1, and the reduced pressure distillation is: reduced pressure distillation at 120° C. for 3 hours, and then heating to 150° C. and reduced pressure distillation for 3 hours.

[0012] Preferably, the mass volume ratio of the colorless viscous liquid product to anhydrous ethanol in S2 is 1 g:10 mL, and the mass volume ratio of diphenylphosphoric acid to anhydrous ethanol is 1 g:4-5 mL. After the dropwise addition is completed, the reaction is carried out at 70°C.

[0013] Preferably, the mass volume ratio of boric acid to isopropanol in S3 is 1 g:25 mL, the molar ratio of the colorless solid product prepared in S2 to boric acid is 1.5:1, and the heating and stirring conditions are 75°C and 200 rpm.

[0014] Preferably, the aerogel is one or more of silicon dioxide, aluminum-based aerogel, and ceramic aerogel, and the thickness of the aerogel is not less than 3 mm.

[0015] A method for preparing a high-efficiency window fire curtain as described above comprises the following steps: uniformly coating a 105°C surface fireproof and heat-insulating modified layer on a glass fiber toughened SiO 2 Both sides of the aerogel will do.

[0016] Preferably, the coating amount of the surface fireproof and heat-insulating modified layer is 0.05 g / cm 2 .

[0017] An application of the above-mentioned high-efficiency window fire curtain on a building window is to attach the high-efficiency window fire curtain to the glass during application.

[0018] By toughening SiO 2The fireproofing of aerogel surface is modified to prepare composite window fireproof curtains, which effectively improves the fire resistance of aerogel. In addition, in order to make the fireproof curtain still adhere to the window glass surface under the impact of flames, so as to avoid external clamping and facilitate use, fireproof structures such as silicon and boron are introduced into the surface fireproof modifier, which is similar to the composition of glass, to ensure the thermal stability and adhesion of the high-temperature carbon layer.

[0019] The fireproofing and heat-insulating effects of the high-efficiency window fireproof curtain prepared by the present invention vary depending on the type and thickness of the aerogel. The better and thicker the aerogel itself is for preparing the high-efficiency window fireproof curtain, the better the fireproofing and heat-insulating effects of the prepared high-efficiency window fireproof curtain.

[0020] Therefore, the present invention provides a high-efficiency window fire curtain and its preparation method and application, and its specific technical effects are as follows:

[0021] (1) The high-efficiency window fire curtain provided by the present invention has strong heat insulation and good fireproof performance; it is light and easy to deploy, and only needs to be attached to the glass of the window when a fire occurs, and it can be tightly attached to the glass under the high temperature of the fire; the surface fireproof and heat-insulating modified layer contains a variety of flame-retardant modified elements of the fireproof structure, which can maintain the integrity of the fire curtain and the glass under the impact of the butane spray gun flame;

[0022] (2) The high-efficiency window fire curtain provided by the present invention contains fire-proof elements such as silicon and boron in the surface fire-proof and heat-insulating modified layer. After the surface is burned, a carbon layer product can be generated and can be effectively adhered to the glass surface, which can effectively prevent the fire curtain from falling off in a fire.

[0023] (3) The preparation method of the high-efficiency window fire curtain provided by the present invention is simple and easy to operate, environmentally friendly, does not use toxic and harmful raw materials, and does not generate toxic and harmful substances, and has no safety hazards during use.

[0024] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0026] Figure 1 Schematic diagram of the structure of the high-efficiency window fire curtain prepared in Example 1 of the present invention;

[0027] Figure 2The colorless viscous liquid product prepared by (1) in part (I) of Example 1 of the present invention 1 H-NMR spectrum;

[0028] Figure 3 is a hydrogen nuclear magnetic resonance spectrum of the colorless solid product prepared by (2) in part (i) of Example 1 of the present invention;

[0029] Figure 4 is the nuclear magnetic resonance phosphorus spectrum of the colorless solid product prepared by (2) in part (i) of Example 1 of the present invention;

[0030] Figure 5 The high temperature carbonization test result of the colorless solid product prepared by (2) in part (I) of Example 1 of the present invention;

[0031] Figure 6 The results of the investigation of the pyrolysis behavior of the colorless solid product prepared by (2) in Part (I) of Example 1 of the present invention are as follows;

[0032] Figure 7 The 3 mm thick glass fiber toughened SiO2 film was not subjected to any treatment by the flame impact of the butane spray gun in Example 2 of the present invention. 2 Photo of aerogel (A) and 3 mm thick glass fiber toughened SiO2 without any treatment after impact 2 Photograph of aerogel (B);

[0033] Figure 8 The 3 mm thick glass fiber toughened SiO2 film was drawn in Example 2 of the present invention and was not subjected to any treatment by the butane spray gun flame impact. 2 Temperature variation curve of aerogel;

[0034] Fig. 9 The photo (A) of the high-efficiency window fire curtain prepared in Example 1 when the flame of the butane spray gun in Example 3 of the present invention is impacted, and the photo (B) of the high-efficiency window fire curtain prepared in Example 1 after the impact;

[0035] Fig.10 is a temperature change curve when the butane spray gun flame impinges on the high-efficiency window fire curtain prepared in Example 1 drawn in Example 3 of the present invention;

[0036] Fig.11 This is a side view of the high-efficiency window fire curtain and glass prepared in Example 1 by the butane spray gun flame impinging in Example 3 of the present invention. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0038] In order to make the purpose, technical scheme and advantages of the present application clearer, more thorough and more complete, the technical scheme of the present invention is clearly and completely described below through the accompanying drawings and examples. The following detailed descriptions are all descriptions of the embodiments, and are intended to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present application belongs.

[0039] The instruments, equipment, reagents and materials used in the examples were all obtained through commercial channels.

[0040] Embodiment 1

[0041] Prepare a high-efficiency window fire curtain, the structural schematic diagram of the high-efficiency window fire curtain is as follows Figure 1 As shown, it consists of three layers, the middle layer is glass fiber toughened SiO 2 Aerogel, glass fiber toughened SiO 2 The aerogel is 3 mm thick, and both sides of the middle layer are surface fireproof and heat-insulating modified layers.

[0042] (I) Preparation of surface fireproof and heat-insulating modified layer, the specific steps are as follows:

[0043] (1) Add 20.3 g of 3-aminopropyldiethoxymethylsilane and 5.4 g of purified water into a three-necked round-bottom flask and reflux at 90 °C for 6 hours. Distill under reduced pressure at 120 °C for 3 hours, and then distill under reduced pressure at 150 °C for 3 hours to obtain a colorless viscous liquid product. The reaction formula is as follows:

[0044] .

[0045] The colorless viscous liquid product obtained by nuclear magnetic resonance detection, 1 H-NMR spectrum Figure 2 shown.

[0046] (2) Take 5 g of the colorless viscous liquid product obtained in step (1) and 10.4 g of diphenylphosphoric acid and dissolve them in 50 mL of anhydrous ethanol. Then slowly add the ethanol solution of the colorless viscous liquid product obtained in step (1) to the ethanol solution of diphenylphosphoric acid equipped with a condensation reflux device. After the addition is complete, continue the reaction at 70 ° C for 12 hours. Remove the ethanol by rotary evaporation to obtain a colorless solid product. The reaction formula is as follows:

[0047] .

[0048] The colorless solid product prepared was detected by nuclear magnetic resonance, and the nuclear magnetic resonance hydrogen spectrum was as follows: Figure 3 As shown, the NMR phosphorus spectrum is as follows Figure 4 shown.

[0049] The high temperature carbonization of the prepared colorless solid product was tested by thermogravimetric analysis. Figure 5 As shown, the carbon residue rate of the prepared colorless solid product at 800 °C is 36%.

[0050] Thermogravimetric analysis was used to detect the pyrolysis behavior of the prepared white solid product. Figure 6 As shown, the temperature at which the colorless solid product prepared has a maximum thermal degradation rate is 330°C.

[0051] (II) Preparation of high-efficiency window fire curtains, the specific steps are as follows:

[0052] Dissolve 0.1 g of boric acid in 2.5 mL of isopropanol, add the colorless solid product obtained in part (I) (the molar ratio of the colorless solid product prepared in part (I) to boric acid is 1.5:1), mix well, stir at 75 °C for 30 min, then heat the mixture to 105 °C to obtain a viscous solution. 2 The dosage is uniform and double-sided coated on the glass fiber toughened SiO 2 Aerogel surface.

[0053] Embodiment 2

[0054] The 3 mm thick glass fiber reinforced SiO2 was purchased without any treatment using a butane spray gun flame. 2 Aerogel (glass fiber toughened SiO 2 The non-impacted surface of the aerogel was attached with an equal area of ​​3 mm thick tempered glass) and the impact time was 1800 s. Figure 7 As shown in the figure, part A is a photo of the butane spray gun flame impact; part B is a photo of the glass fiber toughened SiO after the butane spray gun flame impact 2 The back side of the aerogel (tempered glass surface) shows that the 3 mm thick glass fiber toughened SiO 2 The middle of the aerogel was burned through, with obvious holes appearing, and its integrity was destroyed. At the same time, after the flame spray gun impact test, the glass on the back of the aerogel was shattered.

[0055] Use an infrared thermal imager to record the temperature change of tempered glass during the impact of butane spray gun flame, and draw a temperature change curve. Figure 8 As shown, the 3 mm thick glass fiber toughened SiO 2 The temperature of the glass on the back of the aerogel rises rapidly, reaching a maximum of 600°C.

[0056] Embodiment 3

[0057] The high-efficiency window fire curtain prepared in Example 1 was attached to a tempered glass surface of equal area and 3 mm thick, and cured at 110°C for 3 h. Then, a butane spray gun was used to impinge the high-efficiency window fire curtain prepared in Example 1. The results are as follows: Fig. 9 As shown, Part A is a photo of the butane spray gun flame impact, and Part B is a photo of the unimpacted surface (tempered glass surface) after the butane spray gun flame impact. It can be seen that the high-efficiency window fire curtain maintains its integrity after the butane spray gun flame impact, and there are no obvious holes like in Example 2, and the tempered glass on the back is not broken.

[0058] Use an infrared thermal imager to record the temperature change of tempered glass during the impact of butane spray gun flame, and draw a temperature change curve. Fig.10 As shown, after the high-efficiency window fire curtain prepared in Example 1 is attached, the maximum temperature of the tempered glass is only 300°C.

[0059] Side view of high efficiency window fire curtain and glass after butane torch flame impact test Fig.11 As shown, under the impact of the butane torch flame, the high-efficiency window fire curtain prepared in Example 1 expands, and its thickness is significantly increased compared with the initial 3 mm. At the same time, in the absence of external force clamping, the high-efficiency window fire curtain prepared in Example 1 still adheres to the glass surface after the flame impact.

[0060] Therefore, the high-efficiency window fire curtain provided by the present invention has strong thermal insulation and good fireproof performance; it is light in weight and easy to deploy, and only needs to be attached to the glass of the window when a fire occurs, and it can fit tightly to the glass under high-temperature baking in the fire; the surface fireproof and heat-insulating modified layer contains flame-retardant modified elements of various fireproof structures, and can maintain integrity under the impact of butane spray gun flame; because the surface fireproof and heat-insulating modified layer coated on the surface of the high-efficiency window fire curtain contains fireproof elements such as silicon and boron, a carbon layer product can be generated after the surface burns, and it can effectively adhere to the glass surface, which can effectively prevent the fire curtain from falling off in a fire; the preparation method of the high-efficiency window fire curtain provided is simple and easy to operate, environmentally friendly, does not use toxic and harmful raw materials, and does not generate toxic and harmful substances, and there are no safety hazards during use.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A high-efficiency window fire curtain, characterized by: The high-efficiency window fire curtain is composed of three layers, the middle layer is aerogel, and both sides of the middle layer are surface fireproof and heat-insulating modified layers; The method for preparing the surface fireproof and heat-insulating modified layer comprises the following steps: S1. Reflux 3-aminopropyldiethoxymethylsilane and deionized water at 90°C for 6 hours, and distill under reduced pressure to obtain a colorless viscous liquid product; S2, dissolving the prepared colorless viscous liquid product in anhydrous ethanol, and then adding dropwise to an anhydrous ethanol solution of diphenylphosphoric acid, continuing the reaction for 12 hours after the dropwise addition is complete, removing the ethanol, and obtaining a colorless solid product; S3. Dissolve boric acid in isopropanol, add the colorless solid product prepared in S2 to the obtained solution, mix well, stir under heating and stirring conditions for 30 min, and then heat the mixture to 105° C. to obtain a viscous solution.

2. The high-efficiency window fire curtain according to claim 1, characterized in that: The mass ratio of 3-aminopropyldiethoxymethylsilane to deionized water in S1 is 3-4:1, and the vacuum distillation is as follows: vacuum distillation at 120°C for 3 hours, and then heating to 150°C and vacuum distillation for 3 hours.

3. The high-efficiency window fire curtain according to claim 1, characterized in that: The mass volume ratio of the colorless viscous liquid product to anhydrous ethanol in S2 is 1 g:10 mL, and the mass volume ratio of diphenylphosphoric acid to anhydrous ethanol is 1 g:4-5 mL. After the dropwise addition is completed, the reaction is carried out at 70 °C.

4. The high-efficiency window fire curtain according to claim 1, characterized in that: The mass volume ratio of boric acid to isopropanol in S3 is 1 g:25 mL, the molar ratio of the colorless solid product prepared in S2 to boric acid is 1.5:1, and the heating and stirring conditions are 75°C and 200 rpm.

5. The high-efficiency window fire curtain according to claim 1, characterized in that: The aerogel is one or more of silica aerogel, aluminum-based aerogel, and ceramic aerogel, and the thickness of the aerogel is not less than 3 mm.

6. A method for preparing a high-efficiency window fire curtain according to any one of claims 1 to 5, characterized in that: The steps are as follows: evenly coat the 105°C surface fireproof and heat-insulating modified layer on both sides of the glass fiber toughened SiO2 aerogel.

7. The method for preparing a high-efficiency window fire curtain according to claim 6, characterized in that: The coating amount of the surface fireproof and heat-insulating modified layer is 0.05 g / cm 2 .

8. An application of the high-efficiency window fire curtain according to any one of claims 1 to 5 on building windows, characterized in that: When in use, the high-efficiency window fire curtain is attached to the glass.

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