Water drop impact resistant super-hydrophobic textile and preparation method thereof

Abstract

The invention discloses a water-drop-impact-resistant super-hydrophobic textile and a preparation method thereof. The water-drop-impact-resistant super-hydrophobic textile comprises a fabric and polypyrrole which is loaded on the surface of the fabric and is modified by silane substances. The water-drop-impact-resistant super-hydrophobic textile has broad-spectrum super-hydrophobic performance, the surface water-drop contact angle is larger than or equal to 150 degrees, good air permeability is achieved, the highest air permeability reaches 487mm / s, the water-drop-impact-resistant super-hydrophobic textile can tolerate the hydrostatic pressure of 11770Pa, the super-hydrophobic performance can still be achieved after the textile is pressed or impacted by water drops, and then high pollution resistance and durability are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrophobic coatings, and in particular relates to a water drop impact-resistant super-hydrophobic textile and a preparation method thereof. Background Art

[0002] Textile materials used in the clothing industry are essential for people's lives and production, and are one of the most widely used commodity categories. With the advancement of society, people's demand for the functional properties of clothing and textile materials continues to increase. Superhydrophobic textiles, due to their excellent water and liquid repellency, exhibit advantages such as stain resistance, self-cleaning, antibacterial properties, and high durability in applications. These advantages can reduce the number of washes required for superhydrophobic textiles, thereby reducing water and electricity consumption. Consequently, the application of superhydrophobic textiles in clothing has attracted increasing attention.

[0003] Inspired by the hydrophobic self-cleaning structure of the lotus leaf surface, a large number of methods have been developed to modify and combine rough surface structures using low surface energy materials. However, textiles used in clothing are different from the lotus leaf structure in nature. The lotus leaf surface is a dense, airtight sheet structure; and because clothing textile materials are knitted structures, there are a large number of inter-fiber gaps and fiber interwoven gap structures on the surface and inside. The presence of this gap structure causes the currently prepared super-hydrophobic textiles to press water that contacts the surface of the super-hydrophobic textile into the gaps when facing high water pressure or high-speed impact water droplets, resulting in the water remaining in the fiber gaps or interwoven gaps or even passing through, making its water pressure resistance and water drop impact resistance poor. For example, Chinese patent publication number CN110644228A discloses the use of silica and waterproof and oil-proof agents to prepare slurry-coated fabrics, whose hydrostatic pressure is 133Pa; Chinese patent publication number CN 111926570A discloses a Janus fabric membrane based on polylactic acid, whose hydrostatic pressure is 980Pa.

[0004] At present, in order to improve fabric water pressure resistance and water drop / water flow impact ability, generally select multi-layer dense woven structure or adopt the process such as padding, reduce the fiber gap and the interwoven structure of fabric, as application number is CN 119820968A Chinese patent discloses a kind of double-layer fabric, while ensuring good waterproof effect, also significantly improve the hydrostatic pressure resistance (being 10kPa) of copolymer. However, this kind of mode makes the prepared fabric obtain air permeability and seriously reduces (17.4mm / s), and wears body feeling comfort degree and declines, and has an impact on the application of this kind of fabric in daily wear. Therefore, development has water drop / water flow impact resistance, and there is the super-hydrophobic clothing fabric of good air permeability, is the important subject of current textile industry technology research and development. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a water drop impact-resistant super-hydrophobic textile.

[0006] Another object of the present invention is to provide a method for preparing water droplet impact-resistant super-hydrophobic textiles. The preparation method uses ferric chloride and pyrrole to generate polypyrrole, which is loaded on the surface of the fabric, and then the hydrophobic properties of the fabric are enhanced by silane substances.

[0007] The purpose of the present invention is achieved through the following technical solutions.

[0008] A water drop impact-resistant super-hydrophobic textile comprises a fabric and polypyrrole modified with a silane substance and loaded on the surface of the fabric.

[0009] A method for preparing a water drop impact-resistant super-hydrophobic textile comprises the following steps:

[0010] Step 1: soaking a fabric in a 0-5°C ferric chloride aqueous solution for 1-4 hours, taking it out, and then immersing the fabric in a 0-5°C first solution containing a surfactant and pyrrole, standing it at 0-5°C for 12-24 hours under a pressure of 0.12-0.16 MPa, returning the temperature to room temperature, washing, and drying to obtain a polypyrrole composite fabric, wherein the concentration of ferric chloride in the ferric chloride aqueous solution is 0.2-1 mol / L, the concentration of the surfactant in the first solution is 0.01-0.05 mol / L, and the concentration of pyrrole in the first solution is 0.01-0.1 mol / L; and the concentration of ferric chloride in the ferric chloride aqueous solution is at least 10 times the concentration of pyrrole in the first solution;

[0011] In step 1, the fabric is one of a spandex-nylon blended fabric textile, a polyester fabric textile, and a cotton-polyester blended fabric textile; and the surfactant is cetyltrimethylammonium bromide (CTAB).

[0012] In step 1, the fabric is first soaked in a sodium hydroxide aqueous solution for 2 to 3 hours before being soaked in the ferric chloride aqueous solution, and then washed and dried in sequence.

[0013] In the above technical solution, the concentration of sodium hydroxide in the sodium hydroxide aqueous solution is 0.2 to 1 mol / L.

[0014] In step 1, the method for obtaining the first solution includes: adding a surfactant and pyrrole into water, stirring until uniform, and then ultrasonicating for 15 to 30 minutes to obtain the first solution.

[0015] In step 1, the first solution includes: a surfactant, pyrrole and water.

[0016] In the step 1, the washing is performed by rinsing with water 3 to 5 times.

[0017] In step 1, the concentration of ferric chloride in the ferric chloride aqueous solution is preferably 0.4-0.6 mol / L, the concentration of the surfactant in the first solution is preferably 0.01-0.03 mol / L, and the concentration of pyrrole in the first solution is preferably 0.03-0.05 mol / L.

[0018] Step 2: immersing the polypyrrole composite fabric in a second solution containing a silane substance, stirring at 60-80° C. for 1-2 hours, cooling to room temperature, and drying to obtain a water drop impact-resistant superhydrophobic textile, wherein the silane substance is one of hexadecyltrimethoxysilane (HDTMS) and octadecyltrimethoxysilane (OTMS).

[0019] In step 2, the second solution includes: a silane substance and ethanol.

[0020] In step 2, the volume percentage of the silane substance in the second solution is 1-2%.

[0021] In step 1 and step 2, the drying temperature is 60 to 100° C., and the drying time is 4 to 12 hours.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The water drop impact-resistant super-hydrophobic textile of the present invention has broad-spectrum super-hydrophobic properties, a surface water drop contact angle ≥150°, good air permeability, and an air permeability of up to 487 mm / s. The water drop impact-resistant super-hydrophobic textile can not only withstand a hydrostatic pressure of 11770 Pa, but also can still exhibit super-hydrophobicity after being pressurized or impacted by water drops, thereby having high pollution resistance and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 are scanning electron microscope images, wherein (a) is the water drop impact resistant super-hydrophobic textile prepared in Example 1, and (b) is the hydrophobic textile prepared in Comparative Example 5;

[0025] Figure 2 Raman spectra of the water drop impact resistant superhydrophobic textile and spandex-nylon fabric blended textile prepared in Example 1;

[0026] Figure 3 Graph showing the states of different liquids on the surface of the water drop impact-resistant super-hydrophobic textile prepared in Examples 1 and 2;

[0027] Figure 4 is the static water drop contact angle on the surface, where (a) is Example 1, (b) is Comparative Example 1, and (c) is Example 1 after compression;

[0028] Figure 5The water drop contact angle of the water drop impact resistant super-hydrophobic textile prepared in Example 1 at different cycle times;

[0029] Figure 6 Figures 1 and 2 are dynamic impact test diagrams, (a) shows the water drop impact resistant super-hydrophobic textile prepared in Example 1 before the experiment, (b) shows the dynamic impact test during the experiment, (c) shows the dynamic impact test after the experiment, and (d) shows the water drop impact resistant super-hydrophobic textile prepared in Example 1 after the experiment.

[0030] Figure 7 (a) is the high impact test, Figure 7 (b-e) show the state of water droplets on the surface of the water drop impact-resistant super-hydrophobic textile prepared in Example 1 in the high-altitude impact test. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0032] In the following examples, ferric chloride hexahydrate (purity: 99%), cetyltrimethylammonium bromide (CTAB, purity: 99%), sodium hydroxide (purity: 99%), and ethanol (purity: 95%) were purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0033] Pyrrole (purity: 99%), hexadecyltrimethoxysilane (HDTMS, purity: 99%), and octadecyltrimethoxysilane (OTMS, purity: 99%) were purchased from Shanghai MacLean Biochemical Technology Co., Ltd.

[0034] In the following examples, spandex-nylon blended fabric textiles, polyester fabric textiles, and cotton-polyester blended fabric textiles were all purchased from Zhangyao Textile Co., Ltd.

[0035] Examples 1 to 4

[0036] A method for preparing a water drop impact-resistant super-hydrophobic textile comprises the following steps:

[0037] Step 1: Place a fabric with an area of ​​20 cm × 20 cm in a ferric chloride aqueous solution (500 mL) at T1°C and soak for 1 hour. Then, take it out and spread the fabric in a culture dish containing a first solution (100 mL) at T1°C. Seal the culture dish with a plastic film and place it in a stainless steel sealed tank with a polytetrafluoroethylene liner. Air is introduced into the stainless steel sealed tank so that the pressure inside the stainless steel sealed tank is higher than the standard atmospheric pressure (about 0.1013 MPa) by G. Mpa. Under these pressure conditions, the fabric was allowed to stand at T1°C for 2 hours. After standing, the pressure was released to normal pressure, the culture dish containing the fabric was returned to room temperature, rinsed three times with water, and dried at 60°C for 12 hours to obtain a polypyrrole composite fabric. The first solution comprised a surfactant (the surfactant being hexadecyltrimethylammonium bromide), pyrrole, and water. The method for obtaining the first solution comprised adding the surfactant and pyrrole to water, stirring for 40 minutes until uniform, and then ultrasonicating for 15 minutes to obtain a transparent first solution. The first solution was allowed to stand at T1°C for 1 hour before use. The concentration of the surfactant in the first solution was C1 mol / L, and the concentration of the pyrrole in the first solution was C2 mol / L. The concentration of the ferric chloride in the ferric chloride aqueous solution (the ferric chloride was introduced via ferric chloride hexahydrate) was C3 mol / L. Before being soaked in the ferric chloride aqueous solution, the fabric was first soaked in a sodium hydroxide aqueous solution for 2 hours, then rinsed three times with water, and dried at 100°C for 6 hours. The concentration of the sodium hydroxide in the sodium hydroxide aqueous solution was C4 mol / L.

[0038] Step 2: Immerse the polypyrrole composite fabric in a second solution (1000 mL) containing a silane, stir at 2°C for 3 hours, cool to room temperature, and dry at 60°C for 12 hours to obtain a water droplet impact-resistant superhydrophobic textile. The second solution comprises a silane and ethanol, with the volume percentage of the silane in the second solution being 1.8%.

[0039] The fabrics, silane substances, T1, H1, H2, T2, H3, G, C1, C2, C3 and C4 used in the water drop impact resistant super hydrophobic textiles prepared in Examples 1 to 4 are shown in Table 1

[0040] Table 1

[0041]

[0042]

[0043] Comparative Example 1

[0044] A method for preparing a hydrophobic textile is basically the same as the preparation method of Example 1, except that the fabric is not allowed to stand under pressure. Instead, the fabric is directly spread in a culture dish containing the first solution at T1°C and allowed to stand for 2 hours (the culture dish is sealed with plastic film).

[0045] Comparative Example 2

[0046] A preparation method of a hydrophobic textile is basically the same as the preparation method of Example 1, except that T1 in this comparative example 2 is 20-25°C.

[0047] Comparative Example 3

[0048] A method for preparing a hydrophobic textile is basically the same as the preparation method of Example 1, except that H2 is 8 hours.

[0049] Comparative Example 4

[0050] A preparation method of a hydrophobic textile is basically the same as the preparation method of Example 1, except that T2 is 50°C in this comparative example 4.

[0051] Comparative Example 5

[0052] A method for preparing a hydrophobic textile is basically the same as the preparation method of Example 1, except that the surfactant is methyl orange.

[0053] Comparative Example 6

[0054] A hydrophobic textile is the polypyrrole composite fabric in Example 1.

[0055] The surface morphology of the water drop impact resistant super hydrophobic textile prepared in Example 1 and the hydrophobic textile prepared in Comparative Example 5 was observed using a scanning electron microscope. Figure 1 As shown by Figure 1 As shown in (a), the polypyrrole formed by ferric chloride and pyrrole, after modification with silanes, completely coats the fibers, forming a sponge-like structure. However, the hydrophobic textile prepared in Comparative Example 5, modified with methyl orange, has a fine fibrous structure with spaces between the fibers, making it less dense than the sponge-like structure of polypyrrole.

[0056] The water drop impact resistant super hydrophobic textile and spandex-nylon blended textile prepared in Example 1 were subjected to Raman spectroscopy test. The Raman spectra were as follows: Figure 2 As shown by Figure 2 It can be seen that at 950cm -1 The absorption peak at 1050 cm is the breathing vibration of the pyrrole ring in polypyrrole (PPy). -1 The absorption peak at 1240 cm is the in-plane bending vibration of CH. -1 The absorption peak at 1314 cm is the CN stretching vibration. -1 The absorption peak at 1580 cm is the CC skeleton vibration. -1The absorption peak at is the skeleton vibration of C=C conjugated double bond, while the unmodified spandex-nylon blended textile has no obvious absorption peak. In summary, it shows that polypyrrole (PPy) has been successfully modified on the fabric surface.

[0057] Water, black tea, cola, orange juice, coffee and milk were added to the surface of the water drop impact resistant super hydrophobic textile prepared in Examples 1 and 2, and the state was as follows: Figure 3 As shown by Figure 3 Water, black tea, cola, orange juice, coffee, and milk all maintain a complete spherical shape on the droplet-resistant superhydrophobic textile. This indicates that the droplet-resistant superhydrophobic textile has a universal repellency against a variety of everyday liquids, independent of the liquid's chemical properties (such as acidity, alkalinity, polarity, or viscosity). Therefore, the droplet-resistant superhydrophobic textile of the present invention has broad-spectrum superhydrophobicity and has potential applications in medical, catering, and outdoor equipment.

[0058] When water was further added to the surface of the hydrophobic textile prepared in Comparative Example 6, water residue and penetration were found on the surface, indicating that the hydrophobic textile prepared in Comparative Example 6 was hydrophilic. This also indirectly proves that the polypyrrole in the water drop impact-resistant super-hydrophobic textile prepared in Example 1 was modified with a silane substance.

[0059] Example 5

[0060] Pressure-free group: The water drop impact resistant super-hydrophobic textiles prepared in Examples 1 to 4 and the hydrophobic textiles prepared in Comparative Examples 1 to 5 were subjected to static water drop contact angle tests. The static water drop contact angle test method includes: fixing the fabric on a contact angle measurement table with double-sided tape and keeping the fabric flat, adding water to different areas of the fabric surface 5 times with a syringe, each time adding a volume of 3uL, using a DSA100 contact angle tester to record the water drop contact angle 5 times to obtain the maximum water drop contact angle. Among them, the fabric is one of the water drop impact resistant super-hydrophobic textiles prepared in Examples 1 to 4 and the hydrophobic textiles prepared in Comparative Examples 1 to 5. The maximum water drop contact angle of the pressure-free group is shown in Table 2. The surface static water drop contact angles of the water drop impact resistant super-hydrophobic textile prepared in Example 1 and the hydrophobic textile prepared in Comparative Example 1 are shown in Table 2. Figure 4 As shown in (a~b).

[0061] Hydrostatic pressure group: Use YJ-1200 hydrostatic pressure gauge to test the hydrostatic pressure at 0.10kg / cm 2The water drop impact resistant super-hydrophobic textiles prepared in Examples 1 to 4 and the hydrophobic textiles prepared in Comparative Examples 1 to 4 were respectively pressed for 1 minute under a pressure of approximately 9810 Pa; then, the DSA100 contact angle tester was used to perform static water drop contact angle and rolling angle tests on the water drop impact resistant super-hydrophobic textiles prepared in Examples 1 to 4 and the hydrophobic textiles prepared in Comparative Examples 1 to 4 after being pressed (the rolling angle test method includes: referring to the static water drop contact angle test method, replacing the contact angle measurement table with a rolling angle measurement table, and manually adjusting the angle of the rolling angle measurement table to ensure that the angle is the minimum angle at which a water droplet can roll out of the fabric surface when it drops from a needle to the fabric surface). The maximum water drop contact angle and the maximum rolling angle of the hydrostatic pressure group are shown in Table 2.

[0062] Table 2

[0063]

[0064] If the contact angle of water droplets on the surface of a material is greater than 90°, it is generally called a hydrophobic material. If the contact angle of water droplets on the surface of a material is greater than 150°, it can be called a superhydrophobic material. Figure 4 As shown in Table 2, the water drop impact resistant super-hydrophobic textiles prepared in Examples 1 to 4 exhibit super-hydrophobicity and are super-hydrophobic materials. Moreover, the water drop impact resistant super-hydrophobic textiles prepared in Examples 1 to 4 still have no water residue on their surfaces after being compressed, indicating that the water drop impact resistant super-hydrophobic textiles prepared in Examples 1 to 4 have super-hydrophobicity and are super-hydrophobic materials. 2 (about 9810Pa) under the water drop impact type super hydrophobic textiles show excellent super hydrophobicity, further the water drop impact type super hydrophobic textiles prepared in Example 1 under the hydrostatic pressure of 0.12kg / cm 2 (about 11770Pa) for 1 minute and measure the contact angle of the water drop after compression, such as Figure 4 As shown in (c), Figure 4 As shown in (c), the maximum water drop contact angle is 153.10°, indicating super-hydrophobicity. The hydrophobic textiles prepared in Comparative Examples 1 to 5 exhibit a certain degree of hydrophobicity, but after being compressed, water remains on the surface in the static water drop contact angle test and the rolling angle is large, indicating that a certain rough structure has formed on the surface of the fabric, but a dense layer has not yet formed, resulting in poor hydrophobicity and water resistance.

[0065] Example 6

[0066] According to the method for testing the air permeability of fabrics specified in the national standard GB / T 5453-1997, the water drop impact resistant superhydrophobic textiles prepared in Examples 1 to 4 and the hydrophobic textiles prepared in Comparative Examples 1 to 5 were tested for air permeability under a pressure difference of 100 Pa (the pressure difference is the pressure drop on both sides of the sample) to obtain the air permeability. The air permeability is shown in Table 3. As shown in Table 3, the water drop impact resistant superhydrophobic textiles prepared in Examples 1 to 4 prepared under a certain pressure have both superhydrophobicity and good air permeability, indicating that polypyrrole coating on the fabric fibers does not cause a significant decrease in air permeability. In addition, it can be seen from Comparative Examples 1 to 5 that changes in parameters in the preparation method have a certain effect on the air permeability.

[0067] Table 3

[0068] Examples / Comparative Examples Air permeability Example 1 487mm / s Example 2 431mm / s Example 3 412mm / s Example 4 320mm / s Comparative Example 1 473mm / s Comparative Example 2 440mm / s Comparative Example 3 445mm / s Comparative Example 4 420mm / s Comparative Example 5 405mm / s

[0069] Example 7

[0070] According to the national standard GB / T3920-2008 "Fabric Color Fastness Test", a dry friction test was conducted on the water drop impact resistant super-hydrophobic textile prepared in Example 1 to explore its wear resistance. The water drop impact resistant super-hydrophobic textile prepared in Example 1, which was cut into an area of ​​50 mm × 140 mm, was placed flat on both ends of the test platform and tightened. A friction head (model: Y571B friction color fastness meter, located above the fabric) was used to apply a positive gravity of 9 N to the water drop impact resistant super-hydrophobic textile, so that the warp direction of the water drop impact resistant super-hydrophobic textile was consistent with the running direction of the friction head. The running speed was 2 reciprocating friction cycles per second, and a total of 500 cycles were performed. The water drop contact angle of the water drop impact resistant super-hydrophobic textile prepared in Example 1 was tested at the Nth time, N = 0, 100, 200, 300, 400 and 500. The water drop contact angle of the water drop impact resistant super-hydrophobic textile prepared in Example 1 under different numbers of cycles was as follows: Figure 5 As shown by Figure 5 It can be seen that the water drop contact angle of the water droplet-resistant superhydrophobic textile is above 140° within the cycle of 0 to 300. After the cycle number reaches 500, the water drop contact angle drops to 137.45°. However, the water droplet still maintains its spherical shape and can slide freely on the surface of the water droplet-resistant superhydrophobic textile. The surface of the water droplet-resistant superhydrophobic textile is also not wetted. This shows that the water droplet-resistant superhydrophobic textile has excellent superhydrophobic properties and impact resistance stability.

[0071] Example 8

[0072] The water drop impact resistant super hydrophobic textile prepared in Example 1 was subjected to a spray test according to the AATCC22-2017 "Water Repellency Test - Spray Method" standard formulated by the American Association of Textile Chemists and Colorists (AATCC). Figure 6 As shown by Figure 6 As shown in (d), the surface of the water droplet-resistant superhydrophobic textile did not wet under the dynamic impact of a large number of water droplets. Compared with the standard spray rating image in the AATCC 22-2017 "Water Repellency Test - Spray Method," the test grade was determined to be 100 points.

[0073] like Figure 7 As shown in (a), 15 meters vertically above the surface of the water drop impact resistant super-hydrophobic textile prepared in Example 1, water drops are added to the surface of the water drop impact resistant super-hydrophobic textile in a free fall manner, according to Figure 7 Observe the surface wetting and the change of the water droplet shape after the water droplet impacts (b) to (e). Figure 7 As can be seen, when a water droplet falls from a certain height, it explodes instantly upon contact due to its high velocity. Large droplets roll down, while smaller droplets scatter on the surface. After shaking, the surface is ultimately free of noticeable residual moisture. In summary, water droplet-resistant superhydrophobic textiles possess impact stability.

[0074] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A water drop impact-resistant super-hydrophobic textile, characterized in that: include: The invention relates to a fabric and polypyrrole modified with silane substances and loaded on the surface of the fabric.

2. A method for preparing a water drop impact-resistant super-hydrophobic textile, characterized in that: The following steps are involved: Step 1: soaking a fabric in a 0-5°C ferric chloride aqueous solution for 1-4 hours, taking it out, and then immersing the fabric in a 0-5°C first solution containing a surfactant and pyrrole, standing at 0-5°C for 12-24 hours under a pressure of 0.12-0.16 MPa, returning the temperature to room temperature, washing, and drying to obtain a polypyrrole composite fabric, wherein the concentration of ferric chloride in the ferric chloride aqueous solution is 0.2-1 mol / L, the concentration of the surfactant in the first solution is 0.01-0.05 mol / L, and the concentration of pyrrole in the first solution is 0.01-0.1 mol / L; Step 2: immersing the polypyrrole composite fabric in a second solution containing a silane substance, stirring at 60-80° C. for 1-2 hours, cooling to room temperature, and drying to obtain a water drop impact-resistant super-hydrophobic textile, wherein the silane substance is one of hexadecyltrimethoxysilane and octadecyltrimethoxysilane.

3. The preparation method according to claim 2, characterized in that The fabric is one of spandex-nylon blended fabric textiles, polyester fabric textiles and cotton-polyester blended fabric textiles; and the surfactant is hexadecyltrimethylammonium bromide.

4. The preparation method according to claim 2, characterized in that Before soaking the fabric in the ferric chloride aqueous solution, it must be soaked in the sodium hydroxide aqueous solution for 2 to 3 hours, and then washed and dried in sequence.

5. The preparation method according to claim 4, characterized in that The concentration of sodium hydroxide in the sodium hydroxide aqueous solution is 0.2-1 mol / L.

6. The preparation method according to claim 2, characterized in that The method for obtaining the first solution comprises: adding a surfactant and pyrrole into water, stirring until uniform, and then ultrasonicating for 15 to 30 minutes to obtain the first solution.

7. The preparation method according to claim 2, characterized in that The concentration of ferric chloride in the ferric chloride aqueous solution is preferably 0.4-0.6 mol / L, the concentration of the surfactant in the first solution is preferably 0.01-0.03 mol / L, and the concentration of pyrrole in the first solution is preferably 0.03-0.05 mol / L.

8. The preparation method according to claim 2, characterized in that The second solution includes: a silane substance and ethanol.

9. The preparation method according to claim 2, characterized in that The volume percentage of the silane substance in the second solution is 1-2%.

10. Use of water drop impact resistant superhydrophobic textiles in improving superhydrophobic properties.

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