Cotton fabric with fireproof and heat insulation functions and preparation method and application thereof

Abstract

The application discloses a cotton fabric with fireproof and heat insulation functions and a preparation method and application thereof, and belongs to the technical field of fireproof and heat insulation function composite materials and preparation thereof. The application solves the problems that the existing cotton fabric with fireproof and heat insulation functions has a complex production process, a long production period and cannot be quickly produced and prepared. The application deposits silica fibers on the surface of the cotton fabric, so that the cotton fabric has the characteristics of low heat conduction efficiency and good heat insulation. After the silica nanofibers are deposited on the surface of the cotton fabric, a silica protective layer is formed when heated, so as to isolate external heat and oxygen, and good fireproof and flame-retardant types are exhibited. In addition, before the silica fibers are deposited on the surface of the cotton fabric, the cotton fabric is pretreated by using a silane coupling agent, so that the deposition efficiency of the silica fibers is effectively improved, and the preparation period of the cotton fabric with fireproof and heat insulation functions is effectively shortened.

Description

Technical Field

[0001] This invention relates to a cotton fabric with fireproof and heat-insulating functions, its preparation method and application, belonging to the technical field of fireproof and heat-insulating composite materials and their preparation. Background Technology

[0002] High-rise buildings often contain a large amount of flammable materials, such as curtains and bed sheets. In the event of a fire, these fabrics produce large amounts of smoke containing toxic substances, which can be harmful to health if inhaled. Furthermore, cotton fabrics are highly flammable and burn rapidly, causing the fire to spread quickly and hindering escape and rescue efforts, potentially leading to casualties and property damage. Traditional methods for modifying cotton fabrics to achieve fire-resistant and heat-insulating properties, such as coating, padding and baking, and impregnation and drying, involve complex processes and long production cycles, hindering rapid production and preparation.

[0003] Therefore, there is an urgent need for a cotton fabric with fireproof and heat-insulating functions that can be quickly prepared and can be used in the event of a fire, as well as its preparation method. Summary of the Invention

[0004] This invention addresses the problems of complex manufacturing processes, long production cycles, and inability to quickly produce and prepare existing fire-resistant and heat-insulating cotton fabrics by providing a fire-resistant and heat-insulating cotton fabric, its preparation method, and its application.

[0005] The technical solution of the present invention:

[0006] One objective of this invention is to provide a method for preparing a cotton fabric with fire-resistant and heat-insulating functions, the method comprising the following steps:

[0007] (1) Soak the cotton fabric in a silane coupling agent solution, heat it, take out the cotton fabric, rinse it with anhydrous ethanol and dry it to obtain the pretreated cotton fabric.

[0008] (2) Silica fibers were deposited on the surface of the pretreated cotton fabric by chemical vapor deposition. After being removed and dried, the cotton fabric with fireproof and heat insulation functions was obtained.

[0009] Further specified, (1) the silane coupling agent solution is made by mixing KH550, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10.

[0010] Further specified, (1) the heating treatment temperature is 90℃ and the time is 5~60min.

[0011] Further specified, in (1) the drying temperature is 100℃ and the time is 60min.

[0012] Further specifying, (2) the process of depositing silica fibers by chemical vapor deposition is as follows: methyl-trimethoxysilane and ammonia are placed in two separate containers, and together with the pretreated cotton fabric, they are placed in a vacuum dryer, sealed and evacuated, and then placed in a constant temperature oven for heating.

[0013] Furthermore, the volume ratio of methyl-trimethoxysilane to ammonia is 1:1.

[0014] Further specifying, the seal is evacuated to a vacuum level of -0.094 to -0.092 MPa, and then placed in a constant temperature chamber at 100°C for 7 hours.

[0015] Further specified, (2) the drying temperature is 50℃ and the time is 1.5h.

[0016] The second objective of this invention is to provide a cotton fabric with fireproof and heat-insulating functions prepared by the above method.

[0017] The third objective of this invention is to provide an application of the aforementioned fireproof and heat-insulating cotton fabric, specifically for the manufacture of fire blankets and heat-insulating blankets.

[0018] Beneficial effects:

[0019] This invention deposits silica fibers on the surface of cotton fabric, giving the fabric low thermal conductivity and excellent heat insulation. Furthermore, after depositing silica nanofibers on the cotton fabric surface, a protective silica layer forms upon heating, thus isolating it from external heat and oxygen, exhibiting good fire resistance and flame retardancy. Compared with existing technologies, this invention also has at least the following advantages:

[0020] (1) Before depositing silica fibers on the surface of cotton fabric, the present invention pretreats the cotton fabric with a silane coupling agent, which effectively improves the deposition efficiency of silica fibers and effectively shortens the preparation cycle of cotton fabric with fireproof and heat insulation functions.

[0021] (2) The present invention uses chemical vapor deposition to deposit silica fibers on the surface of cotton fabric. It can be successfully prepared at a low temperature of 100°C. The materials used are inexpensive and readily available, and the equipment is simple, making it suitable for widespread application. Attached Figure Description

[0022] Figure 1 Image of actual cotton fabric;

[0023] Figure 2 SEM images of cotton fabrics;

[0024] Figure 3 This is a photograph of the pretreated cotton fabric from Example 1.

[0025] Figure 4This is an SEM image of the pretreated cotton fabric from Example 1;

[0026] Figure 5 The image shows a physical picture of the fireproof and heat-insulating cotton fabric prepared in Example 1.

[0027] Figure 6 SEM image of the fireproof and heat-insulating cotton fabric prepared in Example 1;

[0028] Figure 7 This is a comparison graph showing the mass growth rate of cotton fabrics during chemical vapor deposition in Examples 1-3 and Comparative Examples 1-3;

[0029] Figure 8 The graph shows the test results of the heat insulation performance of the fireproof and heat-insulating cotton fabric prepared in Example 1.

[0030] Figure 9 The image shows the fire resistance and flame retardancy test results for cotton fabrics.

[0031] Figure 10 The image shows the fire-retardant test results of the cotton fabric with fire-resistant and heat-insulating functions prepared in Example 1.

[0032] Figure 11 The image shows a comparison of the infrared spectra of the cotton fabric, the pretreated cotton fabric, and the cotton fabric with fireproof and heat-insulating functions in Example 1. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the examples in the specification.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, all materials, reagents, methods, and instruments used are conventional materials, reagents, methods, and instruments in the art, and can be obtained commercially by those skilled in the art. Furthermore, all solid and liquid reagents used are of analytical grade.

[0037] Example 1

[0038] (1) Preparation of silane coupling agent solution:

[0039] Weigh out KH550 silane coupling agent, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10, and weigh out 5g, 10g and 100g respectively and place them in a beaker.

[0040] (2) Preparation of the reaction matrix:

[0041] Soak the cotton fabric in a silane coupling agent solution, heat to 90°C, keep warm for 10 minutes, remove, rinse in anhydrous ethanol, and dry in a 100°C oven for later use.

[0042] (3) Preparation of raw materials for the synthesis of silica nanofibers:

[0043] Methyl-trimethoxysilane with a purity of 98% was used as the reactant, and ammonia water with a mass concentration of 25% was used as the catalyst. The two were mixed in a volume ratio of 1:1, and 1.5 ml of each was measured and placed in two small beakers.

[0044] (4) Deposition of silica nanofibers:

[0045] Place the small beaker containing the reactants and catalyst at the bottom of the vacuum dryer, place the dried reaction matrix on the reaction rack inside the vacuum dryer, seal the vacuum dryer and evacuate it to a vacuum degree of -0.092 MPa, and then place the vacuum dryer in a constant temperature oven at 100℃ for 7 hours.

[0046] (5) Take the vacuum dryer out of the constant temperature box, cool it to room temperature and then open the vacuum dryer. Take the reaction matrix with silica nanofibers deposited on the surface out of the vacuum dryer and then place it in the constant temperature box for drying. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed and cooled, take it out to obtain a cotton fabric with fireproof and heat insulation function.

[0047] Example 2

[0048] (1) Preparation of silane coupling agent solution:

[0049] Weigh out KH550 silane coupling agent, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10, and weigh out 5g, 10g and 100g respectively and place them in a beaker.

[0050] (2) Preparation of the reaction matrix:

[0051] Soak the cotton fabric in a silane coupling agent solution, heat to 90°C, keep warm for 20 minutes, remove, rinse in anhydrous ethanol, and dry in a 100°C oven for later use.

[0052] (3) Preparation of raw materials for the synthesis of silica nanofibers:

[0053] Using 98% pure methyl-trimethoxysilane as the reactant and 25% ammonia water as the catalyst, 1.5 ml of each was measured and placed in two small beakers at a volume ratio of 1:1.

[0054] (4) Deposition of silica nanofibers:

[0055] Place the small beaker containing the reactants and catalyst at the bottom of the vacuum dryer, place the dried reaction matrix on the reaction rack inside the vacuum dryer, seal the vacuum dryer and evacuate it to a vacuum degree of -0.092 MPa, and then place the vacuum dryer in a constant temperature oven at 100℃ for 7 hours.

[0056] (5) Take the vacuum dryer out of the constant temperature box, cool it to room temperature and then open the vacuum dryer. Take the reaction matrix with silica nanofibers deposited on the surface out of the vacuum dryer and then place it in the constant temperature box for drying. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed and cooled, take it out to obtain a cotton fabric with fireproof and heat insulation function.

[0057] Example 3

[0058] (1) Preparation of silane coupling agent solution:

[0059] Weigh out KH550 silane coupling agent, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10, and weigh out 5g, 10g and 100g respectively and place them in a beaker.

[0060] (2) Preparation of the reaction matrix:

[0061] Soak the cotton fabric in a silane coupling agent solution, heat to 90°C, keep warm for 30 minutes, remove, rinse in anhydrous ethanol, and dry in a 100°C oven for later use.

[0062] (3) Preparation of raw materials for the synthesis of silica nanofibers:

[0063] Using 98% pure methyl-trimethoxysilane as the reactant and 25% ammonia water as the catalyst, 1.5 ml of each was measured and placed in two small beakers at a volume ratio of 1:1.

[0064] (4) Deposition of silica nanofibers:

[0065] Place the small beaker containing the reactants and catalyst at the bottom of the vacuum dryer. Place the dried reaction matrix on the reaction rack inside the vacuum dryer. Seal the vacuum dryer and evacuate it to a vacuum degree of -0.094 MPa. Then place the vacuum dryer in a constant temperature chamber at 100°C for 7 hours.

[0066] (5) Take the vacuum dryer out of the constant temperature box, cool it to room temperature and then open the vacuum dryer. Take the reaction matrix with silica nanofibers deposited on the surface out of the vacuum dryer and then place it in the constant temperature box for drying. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed and cooled, take it out to obtain a cotton fabric with fireproof and heat insulation function.

[0067] Comparative Example 1

[0068] (1) Preparation of the reaction matrix:

[0069] Cotton fabric was used as the reaction matrix. After washing with deionized water for 30 minutes, it was dried in an oven at 100°C for later use.

[0070] (2) Preparation of raw materials for the synthesis of silica nanofibers:

[0071] Using 98% pure methyl-trimethoxysilane as the reactant and 25% ammonia water as the catalyst, 1.5 ml of each was measured and placed in two small beakers at a volume ratio of 1:1.

[0072] (3) Deposition of silica nanofibers:

[0073] Place the small beaker containing the reactants and catalyst at the bottom of the vacuum dryer, place the dried cotton fabric on the reaction rack inside the vacuum dryer, seal the vacuum dryer and evacuate it to a vacuum degree of -0.093 MPa, and then place the vacuum dryer in a constant temperature chamber at 100℃ for 7 hours.

[0074] (4) Take the vacuum dryer out of the constant temperature box, cool it to room temperature and then open the vacuum dryer. Take the cotton fabric with silica nanofibers deposited on the surface out of the vacuum dryer and then place it in the constant temperature box for drying. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed and cooled, take it out to obtain a cotton fabric with fireproof and heat insulation function.

[0075] Comparative Example 2

[0076] (1) Preparation of silane coupling agent solution:

[0077] Weigh out KH550 silane coupling agent, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10, and weigh out 5g, 10g and 100g respectively and place them in a beaker.

[0078] (2) Preparation of the reaction matrix:

[0079] Soak the cotton fabric in a silane coupling agent solution, heat to 90°C, keep warm for 5 minutes, remove, rinse in anhydrous ethanol, and dry in a 100°C oven for later use.

[0080] (3) Preparation of raw materials for the synthesis of silica nanofibers:

[0081] Using 98% pure methyl-trimethoxysilane as the reactant and 25% ammonia water as the catalyst, 1.5 ml of each was measured and placed in two small beakers at a volume ratio of 1:1.

[0082] (4) Deposition of silica nanofibers:

[0083] Place the small beaker containing the reactants and catalyst at the bottom of the vacuum dryer, place the dried reaction matrix on the reaction rack inside the vacuum dryer, seal the vacuum dryer and evacuate it to a vacuum degree of -0.092 MPa, and then place the vacuum dryer in a constant temperature oven at 100℃ for 7 hours.

[0084] (5) Take the vacuum dryer out of the constant temperature box, cool it to room temperature and then open the vacuum dryer. Take the reaction matrix with silica nanofibers deposited on the surface out of the vacuum dryer and then place it in the constant temperature box for drying. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed and cooled, take it out to obtain a cotton fabric with fireproof and heat insulation function.

[0085] Comparative Example 3

[0086] (1) Preparation of silane coupling agent solution:

[0087] Weigh out KH550 silane coupling agent, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10, and weigh out 5g, 10g and 100g respectively and place them in a beaker.

[0088] (2) Preparation of the reaction matrix:

[0089] Soak the cotton fabric in a silane coupling agent solution, heat to 90°C, keep warm for 60 minutes, remove, rinse in anhydrous ethanol, and dry in a 100°C oven for later use.

[0090] (3) Preparation of raw materials for the synthesis of silica nanofibers:

[0091] Using 98% pure methyl-trimethoxysilane as the reactant and 25% ammonia water as the catalyst, 1.5 ml of each was measured and placed in two small beakers at a volume ratio of 1:1.

[0092] (4) Deposition of silica nanofibers:

[0093] Place the small beaker containing the reactants and catalyst at the bottom of the vacuum dryer, place the dried reaction matrix on the reaction rack inside the vacuum dryer, seal the vacuum dryer and evacuate it to a vacuum degree of -0.092 MPa, and then place the vacuum dryer in a constant temperature oven at 100℃ for 7 hours.

[0094] (5) Take the vacuum dryer out of the constant temperature box, cool it to room temperature and then open the vacuum dryer. Take the reaction matrix with silica nanofibers deposited on the surface out of the vacuum dryer and then place it in the constant temperature box for drying. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed and cooled, take it out to obtain a cotton fabric with fireproof and heat insulation function.

[0095] Comparative Example 4

[0096] (1) Preparation of silane coupling agent solution:

[0097] Weigh out KH550 silane coupling agent, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10, and weigh out 5g, 10g and 100g respectively and place them in a beaker.

[0098] (2) Preparation of the reaction matrix:

[0099] Soak the cotton fabric in a silane coupling agent solution, heat to 90°C, keep warm for 10 minutes, remove, rinse in anhydrous ethanol, and dry in a 100°C oven for later use.

[0100] (3) Preparation of raw materials for the synthesis of silica nanofibers:

[0101] Use 98% pure methyl-trimethoxysilane as a reactant, and measure 1.5 ml into a small beaker.

[0102] (4) Deposition of silica nanofibers:

[0103] Place the small beaker containing the reactants at the bottom of the vacuum dryer, place the dried reaction matrix on the reaction rack inside the vacuum dryer, seal the vacuum dryer and evacuate it to a vacuum degree of -0.093 MPa, and then place the vacuum dryer in a constant temperature oven at 100℃ for 7 hours.

[0104] (5) Remove the vacuum dryer from the constant temperature box, cool it to room temperature, open the vacuum dryer, remove the reaction matrix from the vacuum dryer, and then place it in the constant temperature box for drying. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed, wait for it to cool down before taking it out.

[0105] Comparative Example 5

[0106] (1) Preparation of silane coupling agent solution:

[0107] Weigh out KH550 silane coupling agent, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:10, and weigh out 5g, 10g and 100g respectively and place them in a beaker.

[0108] (2) Preparation of the reaction matrix:

[0109] Soak the cotton fabric in a silane coupling agent solution, heat to 90°C, keep warm for 10 minutes, remove, rinse in anhydrous ethanol, and dry in a 100°C oven for later use.

[0110] (3) Preparation of raw materials for the synthesis of silicon carbide nanofibers:

[0111] Trimethylchlorosilane with a purity of 99% was used as the reactant, and ammonia water with a mass concentration of 25% was used as the catalyst. The reactants were mixed in a volume ratio of 1:1, and 1.5 ml of each was measured and placed in two small beakers.

[0112] (4) Deposition of silicon carbide nanofibers:

[0113] Place the small beaker containing the reactants and catalyst at the bottom of the vacuum dryer, place the dried reaction matrix on the reaction rack inside the vacuum dryer, seal the vacuum dryer and evacuate it to a vacuum degree of -0.093 MPa, and then place the vacuum dryer in a constant temperature oven at 100℃ for 7 hours.

[0114] (5) Remove the vacuum dryer from the constant temperature chamber, cool it to room temperature, open the vacuum dryer, remove the reaction substrate with silicon carbide nanofibers deposited on the surface from the vacuum dryer, and then place it in the constant temperature chamber for drying treatment. The drying temperature is 50℃ and the drying time is 1.5h. After drying is completed, wait for it to cool down and then take it out.

[0115] Example of effect

[0116] (1) The mechanical properties, mass growth rate (mass change of the reaction matrix before and after chemical vapor deposition), thermal insulation properties, and flame retardant properties of the cotton fabric raw materials, Examples 1-3, and Comparative Examples 1-5 were characterized. The results are shown in Table 1 below. Figure 7 As shown:

[0117] Table 1

[0118]

[0119] The mechanical properties test refers to the tensile test in standard GB / T 3923.1-2013. A “—” in the table indicates that the cotton fabric does not meet the requirements and no further performance testing was conducted, or that relevant testing could not be performed.

[0120] As shown in Table 1, compared with Example 1, the content of silica nanofibers on the surface of the cotton fabric in Comparative Example 1 was lower than that in Example 1 because the cotton fabric was not treated in the silane coupling agent solution. This indicates that the cotton fabric pretreated with KH550 silane coupling agent is beneficial for subsequent chemical vapor deposition. Compared with Example 3, the treatment time in the silane coupling agent solution in Comparative Example 3 was too long, resulting in a large number of silane coupling agent macromolecules on the fiber surface, reducing the porosity of the cotton fabric fibers. Therefore, the content of silica nanofibers on the surface of the cotton fabric was lower than that in Example 3 after chemical vapor deposition. Compared with Example 1, Comparative Example 4 did not react due to the lack of ammonia catalysis, and the mass change before and after chemical vapor deposition was very small. Compared with Example 1, Comparative Example 5 replaced the reactant with trimethylchlorosilane, while keeping other reaction conditions the same. No reaction occurred, and the mass change before and after chemical vapor deposition was very small.

[0121] (2) The macroscopic and microscopic morphologies of the cotton fabric in Example 1, the pretreated cotton fabric, and the cotton fabric with fireproof and heat-insulating functions were characterized, and the results are as follows: Figures 1-6 As shown, by Figure 1 It can be seen that the cotton fabric in Example 1 has a smooth surface; Figure 2 It can be seen that the surface of the cotton fabric fibers in Example 1 is smooth; Figure 3 It can be seen that the surface of the cotton fabric is rough after pretreatment; Figure 4 It can be seen that the surface of the cotton fibers after pretreatment is rough and contains a large number of silane coupling agent macromolecules; Figure 5 It can be seen that cotton fabrics with fire-resistant and heat-insulating functions have a rough surface and obvious white fibers; from Figure 6 It is known that the surface of cotton fabric fibers with fireproof and heat insulation functions is rough, and a large amount of silica nanofibers are deposited on the fibers.

[0122] (3) The heat insulation performance of the fireproof and heat-insulating cotton fabric prepared in Example 1 was tested. The specific test method was as follows: the fireproof and heat-insulating cotton fabric prepared in Example 1 was placed on a heating plate at 200°C and infrared imaging was performed. The results are as follows. Figure 8 As shown, by Figure 8 It is known that cotton fabrics with fire-resistant and heat-insulating properties can protect fingers from burns.

[0123] (4) The flame retardant properties of the cotton fabric raw material and the fireproof and heat-insulating cotton fabric prepared in Example 1 were tested, and the results are as follows: Figure 9 and Figure 10 As shown, by Figure 9 and Figure 10 It can be seen that, from Figure 9 It can be seen that when cotton fabric is placed between a chocolate bear and a butane flame for a 60-second fire retardant test, the butane flame burns through the cotton fabric at the 5th second, and the chocolate bear remains exposed to the flame until the 60th second. At the end of the test, the surface of the chocolate bear shows obvious charring. Figure 10 It can be seen that when the fireproof and heat-insulating cotton fabric prepared in Example 1 was placed between a chocolate bear and a butane flame for a fireproof and flame-retardant test, the flame did not burn through the fireproof and heat-insulating cotton fabric prepared in Example 1 until the burning ended, and the surface of the chocolate bear was not carbonized.

[0124] (5) The infrared spectrum comparison diagrams of the cotton fabric in Example 1, the pretreated cotton fabric, and the cotton fabric with fireproof and heat insulation functions are shown below. Figure 11 As shown, by Figure 11 It can be known that 1276cm -1 The absorption peak at 781 cm⁻¹ is the antisymmetric stretching vibration peak of Si-O-Si. -1 The absorption peak at 840 cm⁻¹ is for Si-C. -1 443cm -1 The absorption peaks at 1430 cm⁻¹ represent the symmetric stretching and bending vibrations of Si-O-Si, respectively. In the reaction matrix of Example 1, the absorption peak at 1430 cm⁻¹ represents the symmetric stretching and bending vibrations of Si-O-Si. -1 The peak appearing at this point is a characteristic absorption peak of the deformation vibration within the NH group of the -NH2 functional group. The cotton fabric treated with silane coupling agent solution contains more hydroxyl groups, making it easier to deposit silica nanofibers during chemical vapor deposition.

[0125] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A method for preparing a cotton fabric with fire-resistant and heat-insulating functions, characterized in that, include: (1) Soak the cotton fabric in a silane coupling agent solution, heat it, take out the cotton fabric, rinse it with anhydrous ethanol and dry it to obtain the pretreated cotton fabric. The heating treatment temperature in (1) is 90℃ and the time is 10~30min; (2) Silica fibers were deposited on the surface of the pretreated cotton fabric by chemical vapor deposition, and then dried to obtain a cotton fabric with fireproof and heat insulation functions. The process of depositing silica fibers by chemical vapor deposition in (2) is as follows: methyltrimethoxysilane and ammonia are placed in two separate containers and placed together with the pretreated cotton fabric in a vacuum dryer. After sealing and evacuating, the dryer is placed in a constant temperature oven for heating.

2. The preparation method according to claim 1, characterized in that, (1) The silane coupling agent solution is made by mixing KH550, deionized water and anhydrous ethanol in a mass ratio of 0.5:1:

10.

3. The preparation method according to claim 1, characterized in that, (1) The drying temperature is 100℃ and the time is 60min.

4. The preparation method according to claim 1, characterized in that, The volume ratio of methyltrimethoxysilane to ammonia is 1:

1.

5. The preparation method according to claim 1, characterized in that, The vacuum was evacuated to a pressure of -0.094 to -0.092 MPa and then placed in a constant temperature chamber at 100°C for 7 hours.

6. The preparation method according to claim 1, characterized in that, (2) The drying temperature is 50℃ and the time is 1.5h.

7. A cotton fabric with fireproof and heat-insulating functions prepared by the method according to any one of claims 1 to 6.

8. The application of a cotton fabric with fire-resistant and heat-insulating functions as described in claim 7, characterized in that, Used to make fire blankets and heat insulation blankets.

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