Pre-oxidized fiber-based fireproof flame-retardant fabric as well as preparation method and application thereof

Abstract

The invention discloses a pre-oxidized fiber-based fireproof flame-retardant fabric as well as a preparation method and application thereof, and relates to the technical field of fireproof materials. The fabric comprises a pre-oxidized fiber cloth layer, a pre-oxidized fiber felt layer and a silicon rubber coating; the structure of the fabric is a sandwich structure, the pre-oxidized fiber felt layer is sandwiched between the two pre-oxidized fiber cloth layers, and the outer layer of the sandwich structure is coated with the silicone rubber coating; the pre-oxidized fiber cloth layer is made of high-density pre-oxidized fiber cloth; the silicone rubber coating comprises the following raw materials: 60-80 parts of hydroxyl-terminated fluorine-containing polysiloxane, 5-25 parts of white carbon black, 1-10 parts of hollow glass beads, 1-10 parts of nano silicon dioxide, 2-8 parts of nano aluminum oxide, 2-8 parts of nano magnesium oxide, 1-5 parts of glass fibers, 1-5 parts of PBI fibers, 1-5 parts of melamine fibers, 2-3 parts of diatomite, 3-5 parts of an adhesion promoter, 3-9 parts of a dispersant composition and 25-45 parts of a solvent. According to the fireproof flame-retardant fabric provided by the invention, through the unique design of the sandwich structure and the silicone rubber coating, the high fire resistance, the non-sintering characteristic and the harmlessness to a human body of the fabric are realized.

Description

Technical Field

[0001] The present application relates to the field of fireproof material technology, and in particular to a pre-oxidized silk-based fireproof and flame-retardant fabric and a preparation method and application thereof. Background Art

[0002] Fire-retardant fabric is a functional fabric that can be widely used in home decoration, car interior, fire-fighting clothing and other fields. It can also be used for flame-retardant needs in electric vehicles, mobile phone batteries, etc. It has good fire-retardant and heat-insulating effects.

[0003] With the continuous development of electric bicycles and new energy vehicles, the safety performance of battery products is of vital importance. Under extreme conditions, the spontaneous combustion of batteries will pose a great threat to personnel safety. At present, glass fiber cloth is often used as a flame retardant material for batteries in related technologies, but glass fiber cloth is harmful to the human body, and its maximum heat resistance temperature is only 300-400℃, which cannot meet the flame retardant requirements at higher temperatures. Therefore, the development of a new type of high-performance, harmless to the human body, fire-retardant fabric has become an urgent problem to be solved. Summary of the invention

[0004] In order to provide a fire-proof and flame-retardant fabric that can withstand higher temperatures and is harmless to the human body and a preparation method thereof, the present application provides a pre-oxidized silk-based fire-proof and flame-retardant fabric and a preparation method and application thereof.

[0005] The present application provides a pre-oxidized silk-based fire-retardant fabric, which adopts the following technical solution: A preoxidized silk-based fireproof and flame-retardant fabric, the fabric comprising a preoxidized silk cloth layer, a preoxidized silk felt layer and a silicone rubber coating; the fabric has a sandwich structure, the preoxidized silk felt layer is sandwiched between two preoxidized silk cloth layers, and the outer layer of the sandwich structure is coated with a silicone rubber coating.

[0006] By adopting the above technical scheme and a unique sandwich structure and silicone rubber coating design, the high fire resistance, non-sintering properties and harmlessness to the human body of the fabric are achieved; the comprehensive performance of the fire-retardant fabric is further improved, which is particularly suitable for the safety protection of battery systems such as electric bicycles and new energy vehicles, significantly improving personnel safety.

[0007] Preferably, the silicone rubber coating is composed of the following raw materials in parts by weight: 60-80 parts of terminal hydroxyl fluorinated polysiloxane, 5-25 parts of white carbon black, 1-10 parts of hollow glass microspheres, 1-10 parts of nano-silicon dioxide, 2-8 parts of nano-alumina, 2-8 parts of nano-magnesium oxide, 1-5 parts of glass fiber, 1-5 parts of PBI fiber, 1-5 parts of melamine fiber, 2-3 parts of diatomaceous earth, 3-5 parts of adhesion promoter, 3-9 parts of dispersant composition, and 25-45 parts of solvent.

[0008] By adopting the above technical scheme, the terminal hydroxyl fluorinated polysiloxane has a low surface tension, and this characteristic enables it to form a protective film on the surface of the material, effectively isolating air and heat, thereby preventing the spread of flames; in a high temperature environment, the terminal hydroxyl fluorinated polysiloxane can quickly form a dense carbon layer, which not only has excellent thermal insulation properties, but also can effectively prevent oxygen from contacting the internal material, thereby further improving its flame retardant properties. The terminal hydroxyl fluorinated polysiloxane is compounded with other flame retardant fillers, and under the action of the dispersant composition, its dispersibility is effectively improved to prevent agglomeration, and the fire resistance and high temperature resistance are further effectively enhanced.

[0009] Preferably, the dispersant composition comprises sodium polyacrylate, polyvinyl triethoxysilane and sodium oleate, and the mass ratio of the three is 1:0.4-0.6:0.5-0.7.

[0010] By adopting the above technical solution, sodium polyacrylate, polyvinyl triethoxysilane and sodium oleate are used as dispersants, which not only has good wetting and dispersing properties, but also can reduce the charge and surface energy of the filler surface and reduce agglomeration.

[0011] Preferably, the preoxidized silk cloth layer is a high-density preoxidized silk cloth; the high-density preoxidized silk cloth is woven from preoxidized silk yarns; the warp density of the high-density preoxidized silk cloth is 280-290, the weft density is 135-145, and the total density is greater than 410.

[0012] By adopting the above technical solution, the structure of the high-density pre-oxidized silk cloth is tighter, the contact between fibers is tighter, and the contact between air and flame can be more effectively prevented, the spread of flame can be reduced, and heat conduction and heat radiation in a high-temperature environment can be resisted, thereby improving the heat resistance stability of the pre-oxidized silk cloth layer. After the flame contacts the high-density pre-oxidized silk cloth, it can be extinguished in a shorter time, reducing the possibility of combustion, and it can still maintain its original shape in a high-temperature environment without obvious deformation or shrinkage.

[0013] The present application provides a method for preparing a pre-oxidized silk-based fire-retardant fabric, which adopts the following technical solution: A method for preparing a pre-oxidized silk-based fire-retardant fabric comprises the following steps: S1. Preparing high-density preoxidized silk cloth and preoxidized silk felt; and pretreating the high-density preoxidized silk cloth to obtain a pretreated preoxidized silk cloth; S2. A sandwich structure is adopted, where the preoxidized silk felt layer is sandwiched between two layers of pretreated preoxidized silk cloth; S3. Apply a silicone rubber coating to the outer layer of the sandwich structure, and after curing, obtain a fire-retardant fabric.

[0014] By adopting the above technical solution, the high-density pre-oxidized silk cloth is pretreated Preferably, the method for preparing the high-density pre-oxidized silk cloth comprises the following steps: T1. The preoxidized silk yarn is woven to obtain a high-density preoxidized silk fabric; T2. Desize the high-density pre-oxidized yarn fabric without tension to clean the sizing agent and impurities on the surface of the fabric; T3. Drying and shaping the desized high-density preoxidized silk grey cloth to obtain high-density preoxidized silk cloth.

[0015] Preferably, the method for pretreating the high-density pre-oxidized silk cloth comprises the following steps: The high-density pre-oxidized wire cloth is subjected to plasma treatment at room temperature and pressure for 20-30 seconds to obtain a pre-treated high-density pre-oxidized wire cloth.

[0016] By adopting the above technical solution and using plasma for pretreatment, grease, hydrocarbon dirt, release agent and other residues on the surface of the preoxidized wire cloth can be removed, reducing the influence of pollutants on the adhesion of the coating; at the same time, after the surface of the preoxidized wire cloth layer is pretreated by plasma, the surface of the preoxidized wire cloth can be activated, so that it has a higher surface energy, exposes more active groups, and enhances the adhesion between the preoxidized wire cloth and the coating.

[0017] Preferably, the method for preparing the silicone rubber coating comprises the following steps: Add white carbon black and hollow glass microspheres to terminal hydroxyl fluorinated polysiloxane, add solvent, and stir evenly at 100-300 rpm; then add nano-silicon dioxide, nano-alumina, nano-magnesium oxide, glass fiber, PBI fiber, melamine fiber, diatomaceous earth, and dispersant composition, and stir evenly at 800-1200 rpm; then add adhesion promoter, stir at 200-600 rpm for 1-3 hours to obtain silicone rubber coating.

[0018] Preferably, the thickness of the silicone rubber coating is 0.2-1 mm.

[0019] The application of a pre-oxidized silk-based fire-retardant fabric provided in this application adopts the following technical solution: An application of a pre-oxidized silk-based fire-proof and flame-retardant fabric, and the application of the pre-oxidized silk-based fire-proof and flame-retardant fabric in the safety protection of a battery system.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. The fire-retardant fabric provided in this application adopts a unique sandwich structure and silicone rubber coating design to achieve high fire resistance, non-sintering properties and harmlessness to the human body of the fabric; 2. The fire-resistant and flame-retardant fabric provided by the present application adopts a high-density pre-oxidized silk cloth layer, which more effectively prevents the contact between air and flame, reduces the spread of flame, and resists heat conduction and heat radiation in a high temperature environment, thereby further improving the heat resistance stability of the pre-oxidized silk cloth layer; 3. The fire-retardant fabric provided in this application uses a high-temperature resistant silicone rubber coating, which effectively enhances the fire-retardant and high-temperature resistant properties of the fabric. DETAILED DESCRIPTION

[0021] The present application is further described in detail below with reference to the embodiments.

[0022] Preparation Example Preparation Example 1 Preparation of silicone rubber coating Preparation Example 1.1 5g of white carbon black and 1g of hollow glass microspheres were added to 60g of terminal hydroxyl fluorinated polysiloxane, and 25g of solvent xylene was added, followed by stirring at 100rpm; then 1g of nano-silicon dioxide, 2g of nano-alumina, 2g of nano-magnesium oxide, 1g of glass fiber, 1g of PBI fiber, 1g of melamine fiber, 2g of diatomaceous earth, and 3g of dispersant composition were added, and stirred at 800rpm; then 3g of adhesion promoter was added, and stirred at 200rpm for 3h to obtain a silicone rubber coating; The dispersant composition in this preparation example includes sodium polyacrylate, polyvinyl triethoxysilane, and sodium oleate in a mass ratio of 1:0.4:0.7.

[0023] Preparation Example 1.2 15g of white carbon black and 5g of hollow glass microspheres were added to 70g of terminal hydroxyl fluorinated polysiloxane, and 35g of solvent xylene was added, followed by stirring at 200rpm; 5g of nano-silicon dioxide, 5g of nano-alumina, 5g of nano-magnesium oxide, 3g of glass fiber, 3g of PBI fiber, 3g of melamine fiber, 2.5g of diatomaceous earth, and 6g of dispersant composition were then added, followed by stirring at 1000rpm; 4g of adhesion promoter was then added, and the mixture was stirred at 400rpm for 2h to obtain a silicone rubber coating; The dispersant composition in this preparation example includes sodium polyacrylate, polyvinyl triethoxysilane, and sodium oleate in a mass ratio of 1:0.4:0.7.

[0024] Preparation Example 1.3 25g of white carbon black and 10g of hollow glass microspheres were added to 80g of terminal hydroxyl fluorinated polysiloxane, and 45g of solvent xylene was added, followed by stirring at 300rpm; then 10g of nano-silicon dioxide, 8g of nano-alumina, 8g of nano-magnesium oxide, 5g of glass fiber, 5g of PBI fiber, 5g of melamine fiber, 3g of diatomaceous earth, and 9g of dispersant composition were added, and stirred at 1200rpm; then 5g of adhesion promoter was added, and stirred at 600rpm for 1h to obtain a silicone rubber coating; The dispersant composition in this preparation example includes sodium polyacrylate, polyvinyl triethoxysilane, and sodium oleate in a mass ratio of 1:0.4:0.7.

[0025] Preparation Example 1.4 The difference between Preparation Example 1.4 and Preparation Example 1.1 is that the dispersant composition used in Preparation Example 1.4 includes sodium polyacrylate, polyvinyl triethoxysilane, and sodium oleate in a mass ratio of 1:0.5:0.6.

[0026] Preparation Example 1.5 The difference between Preparation Example 1.5 and Preparation Example 1.1 is that the dispersant composition used in Preparation Example 1.5 includes sodium polyacrylate, polyvinyl triethoxysilane, and sodium oleate in a mass ratio of 1:0.6:0.5.

[0027] Preparation Example 1.6 The difference between Preparation Example 1.6 and Preparation Example 1.1 is that the dispersant composition used in Preparation Example 1.6 includes sodium polyacrylate, polyvinyl triethoxysilane, and sodium oleate in a mass ratio of 1:0.2:1.

[0028] Preparation Example 1.7 The difference between Preparation Example 1.7 and Preparation Example 1.1 is that the dispersant composition used in Preparation Example 1.7 includes sodium polyacrylate, polyvinyl triethoxysilane, and sodium oleate in a mass ratio of 1:1:0.2. Example

[0029] Example 1 The method for preparing the high-density pre-oxidized silk cloth in this embodiment comprises the following steps: T1. The pre-oxidized silk yarn is woven to obtain a high-density pre-oxidized silk fabric having a total density of 380-400; T2. Desize the high-density pre-oxidized yarn fabric without tension to clean the sizing agent and impurities on the surface of the fabric; T3. Dry and shape the desized high-density preoxidized yarn fabric to obtain a high-density preoxidized yarn fabric with a warp density of 280-290, a weft density of 135-145, and a total density of more than 410.

[0030] Preparation of fire retardant fabrics: S1. Preparing preoxidized silk felt and prepared high-density preoxidized silk cloth; subjecting the high-density preoxidized silk cloth to plasma treatment at room temperature and pressure for 20 seconds, wherein the gas in the plasma treatment chamber is ammonia gas and the discharge frequency is 13MHz; obtaining the pretreated preoxidized silk cloth; S2. Using a sandwich structure, sandwiching the preoxidized silk felt layer between two layers of pretreated preoxidized silk cloth layers; S3. The outer layer of the sandwich structure is coated with the silicone rubber coating prepared in Preparation Example 1.1. The coating thickness of the silicone rubber coating is 0.2 mm. After curing, a fire-retardant fabric is obtained.

[0031] Example 2 The method for preparing the high-density pre-oxidized silk cloth in this embodiment comprises the following steps: T1. The pre-oxidized silk yarn is woven to obtain a high-density pre-oxidized silk fabric having a total density of 380-400; T2. Desize the high-density pre-oxidized yarn fabric without tension to clean the sizing agent and impurities on the surface of the fabric; T3. Dry and shape the desized high-density preoxidized yarn fabric to obtain a high-density preoxidized yarn fabric with a warp density of 280-290, a weft density of 135-145, and a total density of more than 410.

[0032] Preparation of fire retardant fabrics: S1. Preparing preoxidized silk felt and prepared high-density preoxidized silk cloth; subjecting the high-density preoxidized silk cloth to plasma treatment at room temperature and pressure for 25 seconds, wherein the gas in the plasma treatment chamber is ammonia gas and the discharge frequency is 13MHz; obtaining the pretreated preoxidized silk cloth; S2. Using a sandwich structure, sandwiching the preoxidized silk felt layer between two layers of pretreated preoxidized silk cloth layers; S3. The outer layer of the sandwich structure is coated with the silicone rubber coating prepared in Preparation Example 1.1. The coating thickness of the silicone rubber coating is 0.2 mm. After curing, a fire-retardant fabric is obtained.

[0033] Example 3 The method for preparing the high-density pre-oxidized silk cloth in this embodiment comprises the following steps: T1. The pre-oxidized silk yarn is woven to obtain a high-density pre-oxidized silk fabric having a total density of 380-400; T2. Desize the high-density pre-oxidized yarn fabric without tension to clean the sizing agent and impurities on the surface of the fabric; T3. Dry and shape the desized high-density preoxidized yarn fabric to obtain a high-density preoxidized yarn fabric with a warp density of 280-290, a weft density of 135-145, and a total density of more than 410.

[0034] Preparation of fire retardant fabrics: S1. Preparing preoxidized silk felt and prepared high-density preoxidized silk cloth; subjecting the high-density preoxidized silk cloth to plasma treatment at room temperature and pressure for 30 seconds, wherein the gas in the plasma treatment chamber is ammonia gas and the discharge frequency is 13MHz; obtaining the pretreated preoxidized silk cloth; S2. Using a sandwich structure, sandwiching the preoxidized silk felt layer between two layers of pretreated preoxidized silk cloth layers; S3. The outer layer of the sandwich structure is coated with the silicone rubber coating prepared in Preparation Example 1.1. The coating thickness of the silicone rubber coating is 0.2 mm. After curing, a fire-retardant fabric is obtained.

[0035] Example 4 The method for preparing the high-density pre-oxidized silk cloth in this embodiment comprises the following steps: T1. The pre-oxidized silk yarn is woven to obtain a high-density pre-oxidized silk fabric having a total density of 80-100; T2. Desize the high-density pre-oxidized yarn fabric without tension to clean the sizing agent and impurities on the surface of the fabric; T3. Dry and shape the desized high-density preoxidized silk fabric to obtain a high-density preoxidized silk fabric with a warp density of 80-90, a weft density of 35-45, and a total density of more than 110.

[0036] Preparation of fire retardant fabrics: S1. Preparing preoxidized silk felt and prepared high-density preoxidized silk cloth; subjecting the high-density preoxidized silk cloth to plasma treatment at room temperature and pressure for 10 seconds, wherein the gas in the plasma treatment chamber is ammonia gas and the discharge frequency is 13MHz; obtaining the pretreated preoxidized silk cloth; S2. Using a sandwich structure, sandwiching the preoxidized silk felt layer between two layers of pretreated preoxidized silk cloth layers; S3. The outer layer of the sandwich structure is coated with the silicone rubber coating prepared in Preparation Example 1.1. The coating thickness of the silicone rubber coating is 0.2 mm. After curing, a fire-retardant fabric is obtained.

[0037] Example 5 The method for preparing the high-density pre-oxidized silk cloth in this embodiment comprises the following steps: T1. The pre-oxidized silk yarn is woven to obtain a high-density pre-oxidized silk fabric having a total density of 380-400; T2. Desize the high-density pre-oxidized yarn fabric without tension to clean the sizing agent and impurities on the surface of the fabric; T3. Dry and shape the desized high-density preoxidized yarn fabric to obtain a high-density preoxidized yarn fabric with a warp density of 280-290, a weft density of 135-145, and a total density of more than 410.

[0038] Preparation of fire retardant fabrics: S1. Prepare preoxidized silk felt and prepared high-density preoxidized silk cloth; subject the high-density preoxidized silk cloth to plasma treatment at room temperature and pressure for 80 seconds, wherein the gas in the plasma treatment chamber is ammonia gas and the discharge frequency is 13MHz; obtain the pretreated preoxidized silk cloth; S2. Use a sandwich structure to sandwich the preoxidized silk felt layer between two layers of pretreated preoxidized silk cloth layers; S3. The outer layer of the sandwich structure is coated with the silicone rubber coating prepared in Preparation Example 1.1. The coating thickness of the silicone rubber coating is 0.2 mm. After curing, a fire-retardant fabric is obtained.

[0039] Example 6 The difference between Example 6 and Example 1 is that the coating thickness of the silicone rubber coating used in Example 6 is 0.6 mm.

[0040] Example 7 The difference between Example 7 and Example 1 is that the coating thickness of the silicone rubber coating used in Example 7 is 1.0 mm.

[0041] Example 8 The difference between Example 8 and Example 1 is that the coating thickness of the silicone rubber coating used in Example 8 is 0.05 mm.

[0042] Example 9 The difference between Example 9 and Example 1 is that the coating thickness of the silicone rubber coating used in Example 9 is 1.5 mm.

[0043] Example 10 The difference between Example 10 and Example 1 is that the silicone rubber coating used in Example 10 comes from Preparation Example 1.2.

[0044] Embodiment 11 The difference between Example 11 and Example 1 is that the silicone rubber coating used in Example 11 comes from Preparation Example 1.3.

[0045] Example 12 The difference between Example 12 and Example 1 is that the silicone rubber coating used in Example 12 comes from Preparation Example 1.4.

[0046] Embodiment 13 The difference between Example 13 and Example 1 is that the silicone rubber coating used in Example 13 comes from Preparation Example 1.5.

[0047] Embodiment 14 The difference between Example 14 and Example 1 is that the silicone rubber coating used in Example 14 comes from Preparation Example 1.6.

[0048] Embodiment 15 The difference between Example 15 and Example 1 is that the silicone rubber coating used in Example 15 comes from Preparation Example 1.7.

[0049] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the outer layer of the sandwich structure of the fire-retardant fabric in Comparative Example 1 is not coated with a silicone rubber coating.

[0050] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the fire-proof and flame-retardant fabric in Comparative Example 2 does not use pre-oxidized silk felt, but directly stacks two layers of high-density pre-oxidized silk cloth, and the surface is coated with silicone rubber coating.

[0051] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the fire-retardant fabric in Comparative Example 3 does not use high-density pre-oxidized silk cloth, but directly applies the silicone rubber coating on the surface of the pre-oxidized silk felt.

[0052] Performance testing 1. According to GB / T 5455-2014 “Determination of vertical direction damage length, smoldering and afterflaming time of textile combustion performance”, the fire-retardant fabrics obtained in Examples 1-15 and Comparative Examples 1-3 were subjected to vertical combustion tests, and the results are shown in Table 1.

[0053] 2. According to GB / T 13767-1992 “Method for Determination of Heat Resistance of Textiles”, the high temperature resistance of the fire-retardant fabrics obtained in Examples 1-15 and Comparative Examples 1-3 was tested, and the results are shown in Table 1.

[0054] The specific test results are as follows: Table 1 Performance test results It can be seen from the test results in Table 1 that the fire-retardant fabric provided in the present application has good flame retardancy and high temperature resistance.

[0055] It can be seen from the test results of Examples 1-5 and Comparative Examples 1-3 that the fire-retardant fabric provided in the present application adopts a sandwich structure design, combined with pre-oxidized silk cloth, pre-oxidized silk felt and silicone rubber coating, which effectively enhances the flame retardancy and high temperature resistance of the fabric. When the sandwich structure is not used in the fabric, or the silicone rubber coating is not used for treatment, the flame retardancy and high temperature resistance of the obtained fabric are both reduced.

[0056] It can be seen from the test results of Examples 1, 6, 7, 8 and 9 that when the thickness of the silicone rubber coating is 0.2-1 mm, the flame retardant property and high temperature resistance of the fabric can be effectively enhanced.

[0057] It can be seen from the test results of Examples 1, 10 and 11 that the composition and preparation method of the silicone rubber coating provided in the present application, and the obtained silicone rubber coating are used in fire-retardant fabrics, which can effectively enhance the flame retardant properties and high temperature resistance of the fabrics.

[0058] It can be seen from the test results of Examples 1, 12, 13, 14, and 15 that when the mass ratio of sodium polyacrylate, polyvinyl triethoxy silane, and sodium oleate used in the preparation of the silicone rubber coating is 1:0.4-0.6:0.5-0.7, the flame retardancy and high temperature resistance of the fabric can be effectively enhanced, but when the weight ratio of sodium polyacrylate, polyvinyl triethoxy silane, and sodium oleate is lower than or exceeds this range, the obtained silicone rubber coating is used in the fabric, and the flame retardancy and high temperature resistance of the fabric are significantly reduced.

[0059] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A pre-oxidized silk-based fire-retardant fabric, characterized in that: The fabric comprises a preoxidized silk cloth layer, a preoxidized silk felt layer and a silicone rubber coating; the fabric has a sandwich structure, the preoxidized silk felt layer is sandwiched between two preoxidized silk cloth layers, and the outer layer of the sandwich structure is coated with a silicone rubber coating.

2. The pre-oxidized silk-based fire-retardant fabric according to claim 1, characterized in that: The silicone rubber coating is composed of the following raw materials in parts by weight: 60-80 parts of terminal hydroxyl fluorine-containing polysiloxane, 5-25 parts of white carbon black, 1-10 parts of hollow glass microspheres, 1-10 parts of nano silicon dioxide, 2-8 parts of nano aluminum oxide, 2-8 parts of nano magnesium oxide, 1-5 parts of glass fiber, 1-5 parts of PBI fiber, 1-5 parts of melamine fiber, 2-3 parts of diatomaceous earth, 3-5 parts of adhesion promoter, 3-9 parts of dispersant composition and 25-45 parts of solvent.

3. The pre-oxidized silk-based fire-retardant fabric according to claim 2, characterized in that: The dispersant composition comprises sodium polyacrylate, polyvinyl triethoxysilane and sodium oleate, and the mass ratio of the three is 1:0.4-0.6:0.5-0.

7.

4. The pre-oxidized silk-based fire-retardant fabric according to claim 1, characterized in that: The preoxidized silk cloth layer is a high-density preoxidized silk cloth; the high-density preoxidized silk cloth is woven from preoxidized silk yarns; the warp density of the high-density preoxidized silk cloth is 280-290, the weft density is 135-145, and the total density is greater than 410.

5. A method for preparing a pre-oxidized silk-based fire-retardant fabric according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Preparing high-density preoxidized silk cloth and preoxidized silk felt; and pretreating the high-density preoxidized silk cloth to obtain a pretreated preoxidized silk cloth; S2. A sandwich structure is adopted, where the preoxidized silk felt layer is sandwiched between two layers of pretreated preoxidized silk cloth; S3. Apply a silicone rubber coating to the outer layer of the sandwich structure, and after curing, obtain a fire-retardant fabric.

6. The method for preparing a pre-oxidized silk-based fire-retardant fabric according to claim 5, characterized in that: The method for preparing the high-density pre-oxidized silk cloth comprises the following steps: T1. The preoxidized silk yarn is woven to obtain a high-density preoxidized silk fabric; T2. Desize the high-density pre-oxidized yarn fabric without tension to clean the sizing agent and impurities on the surface of the fabric; T3. Drying and shaping the desized high-density preoxidized silk grey cloth to obtain high-density preoxidized silk cloth.

7. The method for preparing a pre-oxidized silk-based fire-retardant fabric according to claim 5, characterized in that: The method for pretreating the high-density preoxidized silk cloth comprises the following steps: The high-density pre-oxidized wire cloth is subjected to plasma treatment at room temperature and pressure for 20-30 seconds to obtain a pre-treated high-density pre-oxidized wire cloth.

8. The method for preparing a pre-oxidized silk-based fire-retardant fabric according to claim 5, characterized in that: The preparation method of the silicone rubber coating comprises the following steps: Add white carbon black and hollow glass microspheres to terminal hydroxyl fluorinated polysiloxane, add solvent, and stir evenly at 100-300 rpm; then add nano-silicon dioxide, nano-alumina, nano-magnesium oxide, glass fiber, PBI fiber, melamine fiber, diatomaceous earth, and dispersant composition, and stir evenly at 800-1200 rpm; then add adhesion promoter, stir at 200-600 rpm for 1-3 hours to obtain silicone rubber coating.

9. The method for preparing a pre-oxidized silk-based fire-retardant fabric according to claim 5, characterized in that: The thickness of the silicone rubber coating is 0.2-1 mm.

10. Use of a pre-oxidized silk-based fire-retardant fabric according to any one of claims 1 to 9, characterized in that: Application of the pre-oxidized silk-based fire-retardant fabric in safety protection of battery systems.

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