CN114855445B - A kind of superhydrophobic flame-retardant textile and preparation method thereof - Google Patents

Abstract

The application discloses a preparation method of a super-hydrophobic flame-retardant textile, which comprises the following steps: dissolving tetraethyl orthosilicate in a mixed solvent of absolute ethyl alcohol and water to obtain a mixed solution; adding a siloxane coupling agent into the mixed solution, uniformly mixing, sequentially adding ammonia water and a flame retardant for modification reaction, and aging to obtain a dispersion liquid doped with modified nano particles; immersing a fabric layer into the dispersion liquid doped with the modified nano particles, and forming a nano particle layer on the surface of the fabric layer through twice padding, pre-drying and baking; emulsifying the low surface energy substance to obtain emulsion; and (3) performing twice soaking and twice padding, pre-drying and baking on the emulsion to finish the surface of the nanoparticle layer to form a protective layer, thus obtaining the super-hydrophobic flame-retardant textile. The application successfully prepares the super-hydrophobic flame-retardant textile with good stability by utilizing a method of combining the micro-nano structure and the low-surface energy substance.

Description

A kind of superhydrophobic flame-retardant textile and preparation method thereof

Technical field

The invention relates to the technical field of textiles, and in particular to a super-hydrophobic flame-retardant textile and a preparation method thereof.

Background technique

People's lives are inseparable from textiles. However, textiles are flammable when exposed to a fire source, burn quickly and release a large amount of heat, posing a hidden risk of spreading fire. Fires caused by burning textiles cause huge casualties and economic losses every year, especially in public places, which may cause more serious harm. Therefore, functional finishing of textiles with flame retardant properties can reduce the threat to people's lives and property when fire occurs, expand the application fields of textiles, and has important social significance.

For flame retardant finishing of textiles, the most common method is to cover the surface of the textile with a flame retardant coating to give it flame retardant properties. However, with the development of society, there are more and more requirements for flame-retardant products, and single-function flame-retardant products can no longer meet people's demand for multi-functional textiles. Moreover, most flame retardant coatings will lose flame retardant after water immersion or washing, resulting in reduced flame retardant performance. This not only wastes resources, but may also pose a serious threat to personal safety in a fire. That is, the hydrophobicity of textiles in the prior art is poor, and the flame retardancy after washing is poor.

Therefore, it is necessary to develop a super-hydrophobic flame-retardant textile and its preparation method, which can effectively reduce the washing needs of textiles and the loss of flame-retardant components due to water washing, etc., thereby satisfying the material's application in protective clothing, outdoor, home and other fields. Performance requirements for waterproofing and flame retardancy.

Contents of the invention

The purpose of the present invention is to provide a super-hydrophobic flame-retardant textile and a preparation method thereof. By combining micro-nano structures with low surface energy substances, super-hydrophobic flame-retardant textiles with good stability can be successfully prepared.

In order to achieve the above objects, the present invention adopts the following technical solutions:

In a first aspect of the present invention, a method for preparing superhydrophobic flame-retardant textiles is provided, which method includes:

Dissolve tetraethyl orthosilicate in a mixed solvent of absolute ethanol and water to obtain a mixed solution;

Add a silicone coupling agent to the mixed solution and mix well, then add ammonia water and a flame retardant in sequence to perform a modification reaction, and then age to obtain a dispersion doped with modified nanoparticles;

Dip the fabric layer into the dispersion of the doped modified nanoparticles, and then form a nanoparticle layer on the surface of the fabric layer through two immersions, two rollings, pre-baking and baking;

The low surface energy substance is emulsified to obtain an emulsion; the emulsion is processed through two dipping and two rolling, pre-baking and baking to form a protective layer on the surface of the nanoparticle layer to obtain a super-hydrophobic flame-retardant textile.

In a second aspect of the present invention, a superhydrophobic flame-retardant textile prepared by the method is provided.

One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

The invention provides a method for preparing super-hydrophobic flame-retardant textiles. The method prepares nanoparticles through a sol-gel method, uses a silane coupling agent to modify the nanoparticles, and reduces the agglomeration of the nanoparticles. On the surface of the nanoparticles, Introduce reactive functional groups such as reactive -NH ₂ , -OH, C=C, and introduce nanoparticles into the polymer system to improve the chemical stability of the polymer. At the same time, inorganic resistors are doped during the preparation process of modified nanoparticles. The flame retardant is used to prepare modified nanoparticles doped with inorganic flame retardants, and then the modified nanoparticles doped with flame retardants are arranged on the surface of the textile, and a micro-nano rough structure is constructed on the surface, and then low surface energy substances are used to The textiles are subjected to hydrophobic treatment to prepare textiles with super-hydrophobic flame retardant properties. The advantages of the present invention are as follows:

1. The present invention uses tetraethyl orthosilicate, silane coupling agent and flame retardant as raw materials to prepare modified nano-silica particles doped with flame retardants, and then arranges the modified nano-particles onto the surface of textiles. Build a rough micro-nano structure on the surface of the textile, and then use low surface energy substances to reduce the surface energy of the textile, thereby preparing textiles with superhydrophobic flame retardant properties.

2. The super-hydrophobic flame-retardant textiles of the present invention can impart super-hydrophobic and self-cleaning properties to textiles, effectively reduce the loss of flame-retardant components caused by soaking or washing, expand the safety and application scope of textiles, and increase their added value.

3. The low surface energy substances used in the preparation process of the superhydrophobic flame-retardant textiles of the present invention are linear silicone oil, hexamethyldisilazane or cetyltrimethoxysilane, and no organic fluorine water-repellent agent is used. Energy saving and environmental protection.

4. The preparation method of the superhydrophobic flame-retardant textile of the present invention is simple, has low requirements on process equipment, and is highly practical. It can obtain doped modified nanoparticles of different particle sizes by regulating the dosage of various substances, thereby effectively improving the quality of the textile. Super hydrophobic flame retardant properties.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a water contact angle test chart of the superhydrophobic flame-retardant textile prepared in Example 1 of the present invention;

Figure 2 is a thermogravimetric curve diagram of the superhydrophobic flame-retardant textiles and unfinished textiles prepared in Example 4 of the present invention;

Figure 3 is a comparison diagram of the burning process of superhydrophobic flame-retardant textiles prepared in Example 5 of the present invention and unfinished textiles;

Figure 4 is a flow chart of a method for preparing superhydrophobic flame-retardant textiles provided by the present invention.

Detailed ways

The present invention will be described in detail below with reference to specific implementation modes and examples, from which the advantages and various effects of the present invention will be more clearly presented. Those skilled in the art should understand that these specific implementation modes and examples are used to illustrate the present invention, but not to limit the present invention.

Throughout this specification, unless otherwise specifically stated, the terms used herein are to be understood as having the meaning commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is any conflict, this manual takes precedence.

Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased in the market or obtained through existing methods.

The implementation case of the present invention provides a method for preparing superhydrophobic flame-retardant textiles. The general idea is as follows:

According to a typical embodiment of the present invention, a method for preparing superhydrophobic flame-retardant textiles is provided. As shown in Figure 4, the method includes:

S1. Dissolve tetraethyl orthosilicate in a mixed solvent of absolute ethanol and water to obtain a mixed solution;

In the step S1,

The mass ratio of the tetraethyl orthosilicate to the mixed solvent is (4.68~18.72): (40.51~92.07). The mass ratio is conducive to the hydrolysis of tetraethyl orthosilicate to generate new nuclei, and the polycondensation reaction occurs to generate Three-dimensional network chains to form modified nanoparticles. If the mass ratio is too small, the hydrolysis and polymerization reaction rates in the solution will be slow, and the nucleation and growth of particles will be slow, which is not conducive to the formation of nanoparticles; if the mass ratio is too large, the size of the nanoparticles will be too large and the nanoparticles will The particle dispersion has poor stability. The volume ratio of absolute ethanol to water in the mixed solvent is (45-85): (5-25). The volume ratio in this range is beneficial to the hydrolysis, nucleation and growth of tetraethyl orthosilicate into nanoparticles of suitable particle size.

S2. Add the silicone coupling agent to the mixed solution and mix evenly, then add ammonia water and flame retardant in sequence to perform a modification reaction, and then age to obtain a dispersion doped with modified nanoparticles;

In the step S2,

The silicone coupling agent specifically includes one of aminosiloxane, hydroxysiloxane, hydrogen-containing silicone or epoxy silicone.

The mass ratio of the silane coupling agent to the tetraethyl orthosilicate is (0.47~2.37): (4.68~18.72). The mass ratio is beneficial to the modification of the nanoparticles by the coupling agent and improves the stability of the modified nanoparticles. If the mass ratio is too small, the coupling agent cannot completely modify the nanoparticles; if the mass ratio is too large, the solution will be charged. The effect is enhanced, and particles are attracted to each other and aggregated, resulting in excessively large size of nanoparticles;

The volume ratio of the ammonia water to the mixed solvent is (1-6): (50-110). The volume ratio is conducive to the hydrolysis and nucleation of tetraethyl orthosilicate catalyzed by ammonia water to generate nanoparticles. If the volume ratio is too small, it will have an adverse effect on the formation of nanoparticles; if the volume ratio is too large, modification will occur. The particle size of nanoparticles increases and the degree of agglomeration increases;

The flame retardant includes at least one of ammonium dihydrogen phosphate, ammonium polyphosphate and montmorillonite. The amount of the flame retardant (taking ammonium polyphosphate as an example) is related to the quality of the silicone coupling agent. Ratio (0.82～4.91): (0.47～2.37).

As a specific embodiment, the siloxane coupling agent is added to the mixed solution and the mixing time is 10 to 50 minutes (preferably 30 minutes);

The temperature of the modification reaction is 30-80°C. This temperature is conducive to a series of reactions such as hydrolysis, nucleation, and condensation of tetraethyl orthosilicate. If the temperature is too low, it is not conducive to the progress of the modification reaction or the complete reaction. If the temperature is too high, the nanoparticles are prone to agglomeration and the particle size increases sharply. larger, the stability of the nanoparticle dispersion becomes worse.

The modification reaction time is 30 to 150 min (preferably 120 min).

In the dispersion liquid of the doped modified nanoparticles, the particle size range of the doped modified nanoparticles is 255 to 2120 nm. This particle size range is conducive to the construction of micro-nano rough structures by nanoparticles on the surface of textiles. If the particle size of the doped modified nanoparticles is less than 255nm, it is not conducive to the construction of micro-nano structures on the surface of textiles; the doped modified nanoparticles If the particle size is greater than 2120nm, the nanoparticles are prone to aggregation and the stability of the dispersion is poor;

S3. Dip the fabric layer into the dispersion liquid of the doped modified nanoparticles, and then form a nanoparticle layer on the surface of the fabric layer through two immersions and two rollings, pre-baking and baking;

In the step S3,

The fabric layer is ordinary textile.

The mass ratio of the fabric layer to the dispersion of doped modified nanoparticles is 2.5: (46.54~118.44).

S4. Emulsify the low surface energy substance to obtain an emulsion; process the emulsion through two-dip and two-padding, pre-baking and baking to form a protective layer on the surface of the nanoparticle layer to obtain a super-hydrophobic flame-retardant textile.

In the step S4,

The low surface energy substance is linear silicone oil, hexamethyldisilazane or cetyltrimethoxysilane.

The specific steps for emulsifying the low surface energy substance are as follows: adding a certain amount of the low surface energy substance to water and emulsifying it using a high-speed shear dispersing emulsifier for 10 minutes to obtain an emulsion.

The amount of medium and low surface energy substances in the emulsion is 10% to 30% (based on the weight of the fabric).

In the steps S3 and S4, the pre-baking temperature is 80-100°C; the baking temperature is 110-140°C; and the baking time is 1-5 minutes.

According to another typical embodiment of the present invention, a superhydrophobic flame-retardant textile prepared by the method is provided.

The invention uses tetraethyl orthosilicate, silane coupling agent and flame retardant as raw materials to prepare modified nano-silica particles doped with flame retardants, and then arranges the modified nano-particles onto the surface of textiles. A rough structure of micro-nano structure is constructed on the surface, and then low surface energy substances are used to reduce the surface energy of the textile, thereby preparing textiles with super hydrophobic flame retardant properties.

The preparation method of a superhydrophobic flame-retardant textile of the present application will be described in detail below with reference to examples, comparative examples and experimental data.

Example 1

The preparation process of superhydrophobic flame-retardant textiles is as follows:

(1) Add 20 ml of tetraethyl orthosilicate to 75 ml of absolute ethanol and 10 ml of water, raise the temperature to 30°C, and stir magnetically for 30 minutes.

(2) Add 1.58 ml of silicone coupling agent to the solution in step (1) and react for 30 minutes, then add 2 ml of ammonia water and 3% ammonium polyphosphate in sequence, raise the temperature to 60°C, react for 120 minutes, and age the product for 12 hours , to obtain amino-modified nanosilica emulsion doped with ammonium polyphosphate.

(3) Apply the modified nanoemulsion doped with ammonium polyphosphate to the surface of the textile using two-step dipping and two-padding, pre-baking at 80°C, and baking at 120°C for 2 minutes.

(4) Emulsify the linear silicone oil 0156 into a stable emulsion at high speed on an emulsifier, and then use two immersions and two rollings, pre-baking at 80°C, and baking at 120°C for 2 minutes to graft the silicone oil onto the surface of the textile prepared in step (3). Superhydrophobic flame-retardant textiles were prepared. Figure 1 is a picture of the contact angle of the superhydrophobic flame-retardant textile in Example 1. It can be seen from Figure 1 that the contact angle of the superhydrophobic flame-retardant textile after finishing is 151°, which has good superhydrophobic properties.

Example 2

The preparation process of superhydrophobic flame-retardant textiles is as follows:

(1) Add 10 ml of tetraethyl orthosilicate to 75 ml of absolute ethanol and 10 ml of water, raise the temperature to 30°C, and stir magnetically for 30 minutes.

(2) Add 1.58 ml of silicone coupling agent to the solution in step (1) and react for 30 minutes, then add 2 ml of ammonia water and 1% ammonium polyphosphate in sequence, raise the temperature to 60°C, react for 60 minutes, and then add 1% of ammonium polyphosphate. Ammonium polyphosphate, continue the reaction for 60 minutes, and age the product for 12 hours to obtain an amino-modified nanometer silica emulsion doped with ammonium polyphosphate.

(3) Apply the modified nanoemulsion doped with ammonium polyphosphate to the surface of the textile using two-step dipping and two-padding, pre-baking at 80°C, and baking at 120°C for 2 minutes.

(4) Emulsify the linear silicone oil 0156 into a stable emulsion at high speed on an emulsifier, and then use two immersions and two rollings, pre-baking at 80°C, and baking at 120°C for 2 minutes to graft the silicone oil onto the surface of the textile prepared in step (3). Superhydrophobic flame-retardant textiles were prepared.

The contact angle of the superhydrophobic flame-retardant textile in Example 2 is 129°, which has good hydrophobic properties.

Example 3

The preparation process of superhydrophobic flame-retardant textiles is as follows:

(1) Add 10 ml of tetraethyl orthosilicate to 75 ml of absolute ethanol and 10 ml of water, raise the temperature to 30°C, and stir magnetically for 30 minutes.

(2) Add 1.58 ml of siloxane coupling agent to the solution in step (1) and react for 30 minutes, then add 2 ml of ammonia water, 3% ammonium polyphosphate and 4% montmorillonite in sequence, raise the temperature to 60°C, and react 120 min, and the product was aged for 12 h to obtain an amino-modified nanosilica emulsion doped with ammonium polyphosphate and montmorillonite.

(3) Apply the modified nanoemulsion doped with ammonium polyphosphate and montmorillonite to the surface of the textile using two-step dipping and two-padding, pre-baking at 80°C, and baking at 120°C for 2 minutes.

(4) Emulsify the linear silicone oil 0156 into a stable emulsion at high speed on an emulsifier, and then use two immersions and two rollings, pre-baking at 80°C, and baking at 120°C for 2 minutes to graft the silicone oil onto the surface of the textile prepared in step (3). Preparation of superhydrophobic flame-retardant textiles.

The contact angle of the superhydrophobic flame-retardant textile in Example 3 is 136°, which has good hydrophobic properties.

Example 4

The preparation process of superhydrophobic flame-retardant textiles is as follows:

(1) Add 10 ml of tetraethyl orthosilicate to 75 ml of absolute ethanol and 10 ml of water, raise the temperature to 30°C, and stir magnetically for 30 minutes.

(2) Add 1.58 ml of silicone coupling agent to the solution in step (1) and react for 30 minutes, then add 2 ml of ammonia water and 3% ammonium polyphosphate in sequence, raise the temperature to 70°C, react for 120 minutes, and age the product for 12 hours , to obtain amino-modified nanosilica emulsion doped with ammonium polyphosphate.

(3) Apply the modified nanoemulsion doped with ammonium polyphosphate to the surface of the textile using two-step dipping and two-padding, pre-baking at 80°C, and baking at 120°C for 2 minutes.

(4) Emulsify the linear silicone oil 0156 into a stable emulsion at high speed on an emulsifier, and then use two immersions and two rollings, pre-baking at 80°C, and baking at 120°C for 2 minutes to graft the silicone oil onto the surface of the textile prepared in step (3). Preparation of superhydrophobic flame-retardant textiles.

The contact angle of the superhydrophobic flame-retardant textile in Example 4 is 121°, which has good hydrophobic properties.

The thermogravimetric curves of the unfinished textile and the superhydrophobic flame-retardant textile prepared in Example 4 are shown in Figure 2. It can be seen from the figure that the initial degradation temperature of the superhydrophobic flame-retardant textile in Example 4 is reduced, and the final residual rate is increased to a certain extent, indicating that ammonium polyphosphate is thermally decomposed to produce polyphosphoric acid, which dehydrates and carbonizes the fiber and forms an expanded carbon layer, which is helpful It is used to isolate oxygen and flammable gases and achieve flame retardant effect.

Example 5

The preparation process of superhydrophobic flame-retardant textiles is as follows:

(1) Add 10 ml of tetraethyl orthosilicate to 75 ml of absolute ethanol and 10 ml of water, raise the temperature to 30°C, and stir magnetically for 30 minutes.

(2) Add 1.58 ml of silicone coupling agent to the solution in step (1) and react for 30 minutes, then add 4 ml of ammonia water and 3% ammonium polyphosphate in sequence, raise the temperature to 60°C, react for 120 minutes, and age the product for 12 hours , to obtain amino-modified nanosilica emulsion doped with ammonium polyphosphate.

(3) Apply the modified nanoemulsion doped with ammonium polyphosphate to the surface of the textile using two-step dipping and two-padding, pre-baking at 80°C, and baking at 120°C for 2 minutes.

(4) Emulsify the linear silicone oil 0156 into a stable emulsion at high speed on an emulsifier, and then use two immersions and two rollings, pre-baking at 80°C, and baking at 120°C for 2 minutes to graft the silicone oil onto the surface of the textile prepared in step (3). Preparation of superhydrophobic flame-retardant textiles.

The contact angle of the superhydrophobic flame-retardant textile in Example 5 is 128°, which has good hydrophobic properties.

Figure 3 is a comparison chart of the combustion process between Example 5 and unfinished textiles. As can be seen from Figure 3, the unfinished cotton fabric burns quickly after being ignited, leaving a thin layer of ashes; the superhydrophobic flame-retardant textile prepared in Example 5 can be extinguished after being ignited, leaving an incompletely burned char layer. Certain flame retardant properties.

Comparative example 1

In this comparative example, no flame retardant is added, and other steps are the same as in Example 1.

Comparative example 2

In this comparative example, the mass ratio of the tetraethyl orthosilicate and the mixed solvent is 1:29.26 (not within the scope of the embodiments of the present invention), and other steps are the same as in Example 1.

Comparative example 3

In this comparative example, the mass ratio of the silane coupling agent to the tetraethyl orthosilicate is 1:78.82 (not within the scope of the embodiments of the present invention), and other steps are the same as in Example 1.

Experimental example 1, performance analysis

The performance of the superhydrophobic flame-retardant textiles of each of the above examples and comparative examples was measured and statistically shown in Table 1;

Table 1

Group Hydrophobicity(°) Flame retardancy Example 1 151 Can be extinguished after ignition, leaving a layer of incompletely burned charcoal Example 2 129 Can be extinguished after being ignited, leaving a layer of incompletely burned charcoal Example 3 136 Can be extinguished after being ignited, leaving a layer of incompletely burned charcoal Example 4 121 Can be extinguished after being ignited, leaving a layer of incompletely burned charcoal Example 5 128 Can be extinguished after ignition, leaving a layer of incompletely burned charcoal Comparative example 1 99 Burns after ignition, leaving a smaller portion of incompletely burned charcoal layer Comparative example 2 0 Can be extinguished after ignition, leaving a layer of incompletely burned charcoal Comparative example 3 96 Can be extinguished after being ignited, leaving a layer of incompletely burned charcoal Unfinished textiles 0 Burns quickly after ignition, leaving a thin layer of ash

In the hydrophobicity, the German Krüss DSA 20 contact angle tester was used to test the contact angle of the fabric, and the test water drop volume was 4 μL; the flame retardant property was measured by: placing the textile under an alcohol lamp and igniting it, and then removing the alcohol. Lamp, observe and record the combustion process and combustion products of textiles, and evaluate the flame retardant properties of different textiles through the combustion processes and products.

It can be seen from Table 1 that

In Comparative Example 1, no flame retardant is added, which has the disadvantage of poor hydrophobicity and flame retardant;

In Comparative Example 2, the mass ratio of the tetraethyl orthosilicate and the mixed solvent is 1:29.26 (not within the scope of the embodiments of the present invention), which has the disadvantage of no hydrophobicity;

In Comparative Example 3, the mass ratio of the silane coupling agent to the tetraethyl orthosilicate is 1:78.82 (not within the scope of the embodiments of the present invention), which has the disadvantage of poor hydrophobicity;

However, Examples 1 to 5 of the present invention have better hydrophobic and flame retardant properties.

The particle size of the ammonium polyphosphate-doped amino-modified nanosilica emulsion prepared in Example 1 to Example 5 is shown in Table 2.

Table 2

sample Z-Ave(d.nm) PDI Example 1 1062 0.482 Example 2 1530 0.212 Example 3 1210 0.517 Example 4 665 0.501 Example 5 760 0.064

As can be seen from Table 2, the particle size range of the nanoparticles of Examples 1 to 5 is 665 to 1530 nm, and the PDI is 0.064 to 0.517, indicating that the nanoparticles prepared in Examples 1 to 5 have good dispersion stability and good distribution. narrower.

Finally, it should also be noted that the terms "comprises," "comprises," or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also It also includes other elements not expressly listed or that are inherent to the process, method, article or equipment.

Although the preferred embodiments of the present invention have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are apparent. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (3)

1. A method for preparing a superhydrophobic flame-retardant textile, the method comprising:

dissolving tetraethyl orthosilicate in a mixed solvent of absolute ethyl alcohol and water to obtain a mixed solution; wherein the mass ratio of the tetraethyl orthosilicate to the mixed solvent is (4.68-18.72): (40.51-92.07), wherein the volume ratio of the absolute ethyl alcohol to the water in the mixed solvent is (45-85): (5-25);

adding a silane coupling agent into the mixed solution, uniformly mixing, sequentially adding ammonia water and a flame retardant for modification reaction, and aging to obtain a dispersion liquid doped with modified nano particles; wherein the mass ratio of the silane coupling agent to the tetraethyl orthosilicate is (0.47-2.37): (4.68-18.72); the volume ratio of the ammonia water to the mixed solvent is (1-6): (50-110); the temperature of the modification reaction is 30-80 ℃;

immersing a fabric layer into the dispersion liquid doped with the modified nano particles, and forming a nano particle layer on the surface of the fabric layer through twice padding, pre-drying and baking;

emulsifying the low surface energy substance to obtain emulsion; the emulsion is subjected to twice soaking, twice padding, pre-drying and baking to finish the surface of the nanoparticle layer to form a protective layer, so that the super-hydrophobic flame-retardant textile is obtained; the low-surface energy substance is one of linear silicone oil, hexamethyldisilazane or hexadecyltrimethoxysilane; the flame retardant comprises at least one of monoammonium phosphate, ammonium polyphosphate and montmorillonite, and the mass ratio of the flame retardant to the silane coupling agent is (0.82-4.91): (0.47-2.37).

2. The method for preparing the super-hydrophobic flame retardant textile according to claim 1, wherein the particle size of the doped modified nano particles in the dispersion liquid of the doped modified nano particles is 255-2120 nm.

3. A superhydrophobic flame-retardant textile produced by the method of any of claims 1-2.