Hydrophobic fabrics containing imines and methods of making and using the same

Abstract

The application provides an imine-containing hydrophobic fabric and a preparation method and application thereof, and the method comprises the following steps: dispersing long-chain alkyl trialkoxysilane and 2-((alkylamine) methyl)-5-alkyl phenol into deionized water, and obtaining a solution after ultrasonic homogenization, wherein the dosage ratio of the long-chain alkyl trialkoxysilane and the 2-((alkylamine) methyl)-5-alkyl phenol is 1 mL: 0.1-5 g; dispersing titanium dioxide into the solution obtained in step S1, and obtaining a mixed solution after ultrasonic homogenization, wherein the mass ratio of the titanium dioxide to the 2-((alkylamine) methyl)-5-alkyl phenol is 1: 0.1-10; and placing a fabric into the mixed solution for modification treatment to obtain an imine-containing hydrophobic fabric. The preparation method is simple and environmentally friendly, the obtained hydrophobic fabric has excellent chemical stability and reusability, and has excellent waterproof and oil-water separation performance.

Description

[Technical Field]

[0001] This invention belongs to the field of textile functional modification technology, and relates to an imide-containing hydrophobic fabric, its preparation method and application. [Background Technology]

[0002] With the continuous improvement of people's living standards and science and technology, people's expectations for the function of textiles are no longer limited to warmth and comfort, but also include multifunctional properties such as waterproofing, stain resistance, flame retardancy, self-cleaning, antibacterial, and UV protection. Textiles with hydrophobic properties have broad application prospects and value. Due to their excellent waterproof, stain-resistant, and self-cleaning properties, hydrophobic textiles can be widely used in outdoor rainwear, industrial waterproof fabrics, tents, military uniforms, and other fields.

[0003] Currently, there are two main methods for preparing hydrophobic textiles: one is to prepare hydrophobic nanofibers using a mixing or polymerization method, and then fabricate them into textiles; this method is only applicable to synthetic fibers. The other method involves post-processing textiles or natural fiber fabrics to obtain hydrophobic textiles. Methods for preparing hydrophobic textiles through post-processing of textiles or natural fiber fabrics mainly include sol-gel methods, plasma technology, chemical vapor deposition, self-assembly methods, and polymer modification techniques. Specifically, it is necessary to construct micro / nano roughness on the substrate surface and introduce low surface energy materials to reduce the surface energy of the substrate. Wang Fajun et al. used a solution impregnation method to sequentially deposit polydopamine (PDA), silver oxide nanoparticles (Ag₂O NPs), and perfluorodecyl mercaptan (PFDT) on the surface of polyester fabric to obtain hydrophobic fabrics (Applied Surface Science, 2016, 364, 81-85). The Shanghai Institute of Applied Physics, Chinese Academy of Sciences, has developed an ironable, repairable hydrophobic cotton fabric. This fabric is created by grafting n-hexyl methacrylate and n-dodecyl methacrylate onto cotton fabric, resulting in a hydrophobic material with excellent abrasion resistance; the fabric can withstand approximately 8000 cycles of friction (China Materials Progress, 2013, 10: 629-629). Currently, hydrophobic fabrics still suffer from drawbacks such as complex manufacturing processes and long preparation times, limiting their practical applications.

[0004] Therefore, it is necessary to provide a new technical solution. [Summary of the Invention]

[0005] In order to solve the above-mentioned technical problems and overcome the shortcomings of the prior art, this invention provides an imine-containing hydrophobic fabric, its preparation method and application. The preparation method is simple and environmentally friendly, and the resulting hydrophobic fabric has excellent chemical stability, reusability, and excellent waterproof and oil-water separation properties.

[0006] To achieve the above objectives, the following technical solution is adopted:

[0007] On one hand, the present invention provides a method for preparing an imine-containing hydrophobic fabric, which includes the following steps:

[0008] S1. Disperse long-chain alkyltrialkoxysilane and 2-((alkylamino)methyl)-5-alkylphenol in deionized water, and sonicate until homogeneous to obtain a solution, wherein the ratio of the amount of long-chain alkyltrialkoxysilane to 2-((alkylamino)methyl)-5-alkylphenol is 1 mL: 0.1-1 g;

[0009] S2. Disperse titanium dioxide into the solution obtained in step S1, and sonicate to obtain a mixed solution, wherein the mass ratio of titanium dioxide to 2-((alkylamino)methyl)-5-alkylphenol is 1:0.1-10;

[0010] S3. The fabric is placed in the mixture for modification treatment to obtain an imide-containing hydrophobic fabric.

[0011] Furthermore, the ratio of the long-chain alkyltrialkoxysilane to 2-((alkylamino)methyl)-5-alkylphenol is 1 mL: 0.1–5 g.

[0012] Further, in the solution obtained in step S1, the concentration of the long-chain alkyltrialkoxysilane is 1-100 μL / mL, and the concentration of the 2-((alkylamino)methyl)-5-alkylphenol is 1-100 mg / mL.

[0013] Furthermore, the long-chain alkyltrialkoxysilane is one or more of dodecyltrimethoxysilane, dodecyltriethoxysilane, hexadecyltrimethoxysilane, hexadecyltriethoxysilane, octadecyltrimethoxysilane, and octadecyltriethoxysilane.

[0014] Further, the 2-((alkylamino)methyl)-5-alkylphenol is one or more of 2-((dodecanoamino)methyl)-5-pentadecanophenol, 2-((tetradecanoamino)methyl)-5-pentadecanophenol, 2-((hexadecanoamino)methyl)-5-pentadecanophenol hexadecyltrimethoxysilane, and 2-((octadecanoamino)methyl)-5-pentadecanophenol.

[0015] Furthermore, the titanium dioxide is hydrophilic titanium dioxide nanoparticles with a diameter of 5-100 nm, and the concentration of titanium dioxide in the solution is 1-100 mg / mL; the mass ratio of titanium dioxide to 2-((alkylamino)methyl)-5-alkylphenol is 1:0.1-1.

[0016] Furthermore, the modification treatment of the fabric by placing it in the mixture involves the following steps: placing the fabric in the mixture and shaking it at a constant temperature of 25-100°C for 4-20 hours, followed by washing and drying to obtain an imide-containing hydrophobic fabric.

[0017] Furthermore, the fabric is one of cotton fabric, wool fabric, silk, pure linen, polyester, and nylon.

[0018] On the other hand, the present invention also provides an imine-containing hydrophobic fabric, which is prepared by the above-described method for preparing an imine-containing hydrophobic fabric.

[0019] In another aspect, the present invention also provides an application of the imide-containing hydrophobic fabric as described above, wherein the imide-containing hydrophobic fabric is used for waterproofing and oil-water separation.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The imine-containing hydrophobic fabric preparation process of the present invention is simple, easy to operate, free of fluorine reagents, low in cost, green and environmentally friendly, and can be prepared on a large scale. The hydrophobic cotton fabric obtained by the present invention has a contact angle of up to 133.3°, excellent chemical stability, reusability, and excellent waterproof and oil-water separation performance. [Attached Image Description]

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 Image showing the water contact angle of the hydrophobic cotton fabric prepared in Example 2 of this invention;

[0024] Figure 2 The infrared spectrum of the hydrophobic cotton fabric prepared in Example 2 of this invention;

[0025] Figure 3 This is a scanning electron microscope image of the hydrophobic cotton fabric prepared in Example 2 of the present invention;

[0026] Figure 4 EDS elemental distribution diagram of the hydrophobic cotton fabric prepared in Example 2 of the present invention;

[0027] Figure 5 This is a graph showing the separation efficiency of the hydrophobic cotton fabric prepared in Example 2 of the present invention for different organic solvent / water mixtures;

[0028] Figure 6This is a graph showing the number of oil-water separation cycles of the hydrophobic cotton fabric prepared in Example 2 of the present invention. 【Detailed Implementation Methods】

[0029] To further aid in understanding the technical solution of the present invention, several specific implementation examples are provided below to describe the technical solution of the present invention in more detail. All of these described embodiments are only some embodiments of the present invention, and not all of them. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0030] Example 1

[0031] This embodiment provides a method for preparing an imide-containing hydrophobic fabric, comprising the following steps:

[0032] (1) Disperse 0.4 mL of octadecyltrimethoxysilane and 0.2 g of 2-((octadecylamino)methyl)-5-pentadecanylphenol in 20 mL of deionized water and sonicate for 15 minutes. The concentration of the long-chain alkyltrialkoxysilane is 1–100 μL / mL, and the concentration of the 2-((alkylamino)methyl)-5-alkylphenol is 1–100 mg / mL. In this Example 1, the concentration of the long-chain alkyltrialkoxysilane is preferably 20 μL / mL, and the concentration of the 2-((alkylamino)methyl)-5-alkylphenol is preferably 10 mg / mL. In this Example 1, the long-chain alkyltrialkoxysilane is octadecyltrimethoxysilane, and the 2-((alkylamino)methyl)-5-alkylphenol used is 2-((octadecylamino)methyl)-5-pentadecanylphenol. In other embodiments, the long-chain alkyltrialkoxysilane used in step (1) may also be one or more of dodecyltrimethoxysilane, dodecyltriethoxysilane, hexadecyltrimethoxysilane, hexadecyltriethoxysilane, and octadecyltriethoxysilane; the 2-((alkylamino)methyl)-5-alkylphenol used may also be one or more of 2-((dodecylamino)methyl)-5-pentadecanylphenol, 2-((tetradecylamino)methyl)-5-pentadecanylphenol, 2-((hexadecylamino)methyl)-5-pentadecanylphenol, and hexadecyltrimethoxysilane.

[0033] (2) Under ultrasonic oscillation, 0.2g of titanium dioxide is added to the solution in step (1), and ultrasonic oscillation is performed for 15 minutes to obtain a mixture. The titanium dioxide is hydrophilic titanium dioxide nanoparticles with a diameter of 5-100nm and a concentration of 1-100mg / mL. In this embodiment, the diameter of the titanium dioxide nanoparticles is preferably 25nm, and the concentration of titanium dioxide is preferably 10mg / mL.

[0034] (3) Place the clean cotton fabric into the mixture from step (2) and oscillate in a constant-temperature water bath for 4, 8, 12, 16, and 20 hours respectively. The temperature is 25°C and the oscillation speed is 100 rpm. Remove the modified cotton fabric and dry it in a 100°C oven to obtain an imide-containing hydrophobic fabric. In Example 1, the fabric is cotton fabric. In other examples, the fabric may also be one of wool fabric, silk, pure linen, polyester, or nylon.

[0035] Example 2

[0036] Unlike Example 1, in step (3), the constant temperature water bath shaking time is 8 hours, and the rest is the same as in Example 1.

[0037] Example 3

[0038] Unlike Example 1, in step (3), the constant temperature water bath shaking time is 12h, and the rest is the same as in Example 1.

[0039] Example 4

[0040] Unlike Example 1, in step (3), the constant temperature water bath shaking time is 16 hours, and the rest is the same as in Example 1.

[0041] Example 5

[0042] Unlike Example 1, in step (3), the constant temperature water bath shaking time is 20h, and the rest is the same as in Example 1.

[0043] The water contact angles of the modified cotton fabrics prepared in Examples 1-5 were measured to be 132.1°, 133.3°, 131.9°, 124.2°, and 126.8°, respectively. Figure 1 Images showing the water contact angle of the hydrophobic cotton fabric prepared in Example 2 of this invention; as shown. Figure 1 As shown, the hydrophobic cotton fabric obtained by this invention has a contact angle of up to 133.3°, exhibiting excellent hydrophobic properties.

[0044] Example 6

[0045] This embodiment provides a method for preparing an imide-containing hydrophobic fabric, comprising the following steps:

[0046] (1) Disperse 0.4 mL of octadecyltrimethoxysilane and 0.2 g of 2-((octadecylamino)methyl)-5-pentadecanylphenol in 20 mL of deionized water and sonicate for 15 minutes;

[0047] (2) Under ultrasonic oscillation, add 0.2g of titanium dioxide to the solution in step (1) and oscillate ultrasonically for 15 minutes;

[0048] (3) Place the clean cotton fabric into the solution in step (2), and shake it in a constant temperature water bath at 50°C for 8 hours at a shaking speed of 100 rpm. Take out the modified cotton fabric and dry it in an oven at 100°C to obtain the imine-containing hydrophobic fabric.

[0049] Example 7

[0050] Unlike Example 6, in step (3), the temperature of the constant temperature water bath is 70°C, and the rest is the same as in Example 6.

[0051] Example 8

[0052] Unlike Example 6, in step (3), the temperature of the constant temperature water bath is 90°C, while the rest is the same as in Example 6.

[0053] The water contact angles of the modified cotton fabrics prepared in Examples 6-8 were measured to be 132.7°, 133.3°, and 131.3°, respectively.

[0054] Example 9

[0055] A method for preparing an imide-containing hydrophobic fabric includes the following steps:

[0056] (1) Disperse 0.2 mL of octadecyltrimethoxysilane and 0.2 g of 2-((octadecylamino)methyl)-5-pentadecanylphenol in 20 mL of deionized water and sonicate for 15 minutes;

[0057] (2) Under ultrasonic oscillation, add 0.2g of titanium dioxide to the solution in step (1) and oscillate ultrasonically for 15 minutes;

[0058] (3) Place the clean cotton fabric into the solution in step (2), and shake it in a constant temperature water bath at 70°C for 8 hours at a shaking speed of 100 rpm. Take out the modified cotton fabric and dry it in an oven at 100°C to obtain the imide-containing hydrophobic fabric.

[0059] Example 10

[0060] The difference between Example 10 and Example 9 is that in step (1), 0.6 mL of octadecyltrimethoxysilane and 0.2 g of 2-((octadecylamino)methyl)-5-pentadecanylphenol were dispersed in 20 mL of deionized water and ultrasonically vibrated for 15 minutes. The rest was the same as in Example 9.

[0061] The water contact angles of the modified cotton fabrics prepared in Examples 9 and 10 were measured to be 129.2° and 133.8°, respectively.

[0062] Example 11

[0063] A method for preparing an imide-containing hydrophobic fabric includes the following steps:

[0064] (1) Disperse 0.1g of 2-((octadecylamino)methyl)-5-pentadecanylphenol and 0.4mL of octadecyltrimethoxysilane in 20mL of deionized water and sonicate for 15 minutes;

[0065] (2) Under ultrasonic oscillation, add 0.2g of titanium dioxide to the solution in step (1) and oscillate ultrasonically for 15 minutes;

[0066] (3) Place the clean cotton fabric into the solution in step (2), and shake it in a constant temperature water bath at 70°C for 8 hours at a shaking speed of 100 rpm. Take out the modified cotton fabric and dry it in an oven at 100°C to obtain the imide-containing hydrophobic fabric.

[0067] Example 12

[0068] The difference between Example 12 and Example 11 is that in step (1), 0.3 g of 2-((octadecylamino)methyl)-5-pentadecanylphenol and 0.4 mL of octadecyltrimethoxysilane were dispersed in 20 mL of deionized water and ultrasonically vibrated for 15 minutes. The rest was the same as in Example 13.

[0069] The water contact angles of the modified cotton fabrics prepared in Examples 11 and 12 were measured to be 124.2° and 133.5°, respectively.

[0070] Example 13

[0071] A method for preparing an imide-containing hydrophobic fabric includes the following steps:

[0072] (1) Disperse 0.4 mL of octadecyltrimethoxysilane and 0.2 g of 2-((octadecylamino)methyl)-5-pentadecanylphenol in 20 mL of deionized water and sonicate for 15 minutes;

[0073] (2) Under ultrasonic oscillation, add 0.1g of titanium dioxide to the solution in step (1) and oscillate for 15 minutes.

[0074] (3) Place the clean cotton fabric into the solution in step (2), and shake it in a constant temperature water bath at 70°C for 8 hours at a shaking speed of 100 rpm. Take out the modified cotton fabric and dry it in an oven at 100°C to obtain the imide-containing hydrophobic fabric.

[0075] Example 14

[0076] The difference between Example 14 and Example 13 is that: (2) 0.3g of titanium dioxide was added to the solution in step (1) under ultrasonic oscillation, and ultrasonic oscillation was performed for 15 minutes. The rest is the same as in Example 13.

[0077] The water contact angles of the modified cotton fabrics prepared in Examples 13 and 14 were measured to be 129.7° and 133.2°, respectively.

[0078] Example 15

[0079] The present invention also provides an imide-containing hydrophobic fabric, which is prepared by the preparation method of the above embodiments.

[0080] Example 16

[0081] The present invention also provides an application of an imide-containing hydrophobic fabric for waterproofing and oil-water separation.

[0082] The modified cotton fabric prepared in Example 2 was subjected to performance tests. The test results are as follows:

[0083] Figure 2 The infrared spectrum of the hydrophobic cotton fabric prepared in Example 2 of this invention; Figure 3 This is a scanning electron microscope image of the hydrophobic cotton fabric prepared in Example 2 of the present invention; Figure 4 This is an EDS elemental distribution diagram of the hydrophobic cotton fabric prepared in Example 2 of the present invention. Figure 2 As shown, 3336.67cm -1 The absorption peak attributable to the hydroxyl stretching vibration of cotton fibers is 2917.93 cm⁻¹. -1 2850.99cm -1 The absorption peak is attributed to the methylene stretching and bending vibrations, at 1632.55 cm⁻¹. -1 1468.03cm -1 The absorption peak is attributed to the vibration of the aromatic ring framework, at 1056.95 cm⁻¹. -1 The absorption peaks are attributed to the carbon-oxygen stretching vibration, and the infrared spectrum indicates the successful preparation of the imine-containing hydrophobic fabric. Figure 3 As shown, the fabric surface is covered with a granular material with a petal-like structure. Figure 4 As shown, the EDS elemental analysis of the fabric surface reveals the presence of carbon, nitrogen, oxygen, and titanium, indicating the successful preparation of an imine-containing hydrophobic fabric. The preparation method of this invention involves the interaction of hydroxyl groups on the titanium dioxide surface with octadecyltrimethoxysilicic acid, produced by the hydrolysis of octadecyltrimethoxysilane, which adheres to the fabric surface, thereby increasing the surface roughness. Increasing the amount of titanium dioxide leads to agglomeration, reducing the surface roughness. Furthermore, octadecyltrimethoxysilicic acid can combine with the hydroxyl groups on the cotton fabric surface and the phenolic hydroxyl groups of 2-((octadecylamino)methyl)-5-pentadecanylphenol, further enhancing the fabric's hydrophobic properties by introducing a low-surface-energy long-chain aliphatic hydrocarbon.

[0084] Please see Figure 5 and Figure 6 , Figure 5This is a graph showing the separation efficiency of the hydrophobic cotton fabric prepared in Example 2 of the present invention for different organic solvent / water mixtures; Figure 6 This is a graph showing the number of oil-water separation cycles for the hydrophobic cotton fabric prepared in Example 2 of the present invention. The imine-containing hydrophobic fabric prepared in Example 2 was subjected to oil-water separation tests with a mixture of organic solvents such as carbon tetrachloride, dichloromethane, cyclohexane, o-dichlorobenzene, and petroleum ether with an aqueous solution of methylene blue (mass ratio 1:1). The specific operating steps were as follows: the aqueous phase was dyed with methylene blue, and 20g of the aqueous phase and 20g of the oil phase were poured into the oil-water separation device. The selected oil phases, cyclohexane and petroleum ether, have densities lower than the aqueous phase. Therefore, when the oil-water mixture is poured into the separation device, the oil phase preferentially passes through the hydrophobic fabric when poured from the beaker and permeates through the fabric under gravity, while the aqueous phase is retained in the upper container, thus achieving the separation of the oil-water mixture. When the selected oil phase is dichloromethane, carbon tetrachloride, or o-dichlorobenzene, its density is greater than that of the aqueous phase. Therefore, when the oil-water mixture is poured into the separation device, the oil phase is below the aqueous phase and passes through the fabric under the influence of gravity, while the aqueous phase is retained in the upper container, thus achieving the separation of the oil-water mixture. To evaluate the separation ability of the fabric for various oil phases, the separation efficiency (R) is used as the evaluation standard, R = (m1 / m0) × 100%, where m1 is the mass of the oil phase after passing through the fabric, and m0 is the initial mass of the oil phase. The tests showed that the mass of dichloromethane passing through the fabric was 19.2 g (out of an initial mass of 20 g), with a separation efficiency of 96%; the mass of carbon tetrachloride passing through the fabric was 19.6 g (out of an initial mass of 20 g), with a separation efficiency of 98%; the mass of cyclohexane passing through the fabric was 19.6 g (out of an initial mass of 20 g), with a separation efficiency of 98%; the mass of petroleum ether passing through the fabric was 19.4 g (out of an initial mass of 20 g), with a separation efficiency of 97%; and the mass of o-dichlorobenzene passing through the fabric was 19.2 g (out of an initial mass of 20 g), with a separation efficiency of 96%. Oil-water separation tests were performed on a mixed solution of dichloromethane and water to evaluate the recycling performance of the prepared imine-containing hydrophobic fabric membrane. Figure 6 As shown, the separation performance remained essentially unchanged during 10 cycles of oil-water separation experiments.

[0085] This invention provides a method for preparing an imine-containing hydrophobic fabric. The method involves the decomposition of octadecyltrimethoxysilane in water to form silicic acid, which simultaneously couples with 2-((octadecylamino)methyl)-5-pentadecanylphenol, titanium dioxide nanoparticles, and hydroxyl groups on the fabric fibers. On one hand, titanium dioxide constructs micro / nano roughness on the fabric surface; on the other hand, low surface energy substances are introduced into the fabric surface, reducing the surface energy of the substrate, thereby preparing the hydrophobic fabric. The hydrophobic fabric preparation process of this invention is simple, environmentally friendly, and low-cost, suitable for large-scale production, and can be reused repeatedly. It exhibits high separation efficiency in oil-water separation processes and has good application prospects.

[0086] It should be noted that any modifications made by those skilled in the art to the specific embodiments of the present invention do not depart from the scope of the claims. Accordingly, the scope of the claims is not limited to the foregoing specific embodiments.

Claims

1. A method for preparing an imine-containing hydrophobic fabric, characterized in that, It includes the following steps: S1. Disperse long-chain alkyltrialkoxysilane and 2-((alkylamino)methyl)-5-alkylphenol in deionized water, and sonicate to obtain a solution. The ratio of the long-chain alkyltrialkoxysilane to 2-((alkylamino)methyl)-5-alkylphenol is 1 mL: 0.1~5 g. The 2-((alkylamino)methyl)-5-alkylphenol is one or more of 2-((dodecanoamino)methyl)-5-pentadecanophenol, 2-((tetradecanoamino)methyl)-5-pentadecanophenol, 2-((hexadecanoamino)methyl)-5-pentadecanophenol, and 2-((octadecanoamino)methyl)-5-pentadecanophenol. S2. Disperse titanium dioxide into the solution obtained in step S1, and sonicate to obtain a mixed solution, wherein the mass ratio of titanium dioxide to 2-((alkylamino)methyl)-5-alkylphenol is 1:0.1-10; S3. The fabric is placed in the mixture for modification treatment to obtain an imide-containing hydrophobic fabric.

2. The method for preparing imine-containing hydrophobic fabric according to claim 1, characterized in that, The ratio of the long-chain alkyltrialkoxysilane to 2-((alkylamino)methyl)-5-alkylphenol is 1 mL: 0.1~1 g.

3. The method for preparing imine-containing hydrophobic fabric according to claim 1, characterized in that, The concentration of the long-chain alkyltrialkoxysilane is 1–100 μL / mL, and the concentration of the 2-((alkylamino)methyl)-5-alkylphenol is 1–100 mg / mL.

4. The method for preparing imine-containing hydrophobic fabric according to claim 1, characterized in that, The long-chain alkyltrialkoxysilane is one or more of dodecyltrimethoxysilane, dodecyltriethoxysilane, hexadecyltrimethoxysilane, hexadecyltriethoxysilane, octadecyltrimethoxysilane, and octadecyltriethoxysilane.

5. The method for preparing imine-containing hydrophobic fabric according to claim 1, characterized in that, The titanium dioxide is hydrophilic titanium dioxide nanoparticles with a diameter of 5-100 nm. The concentration of titanium dioxide in the solution is 1-100 mg / mL. The mass ratio of titanium dioxide to 2-((alkylamino)methyl)-5-alkylphenol is 1:0.1-1.

6. The method for preparing imine-containing hydrophobic fabric according to claim 1, characterized in that, The modification treatment of the fabric by immersing it in the mixture involves the following steps: immersing the fabric in the mixture and shaking it at a constant temperature of 25-100℃ for 4-20 hours, followed by washing and drying to obtain an imide-containing hydrophobic fabric.

7. The preparation method according to claim 1, characterized in that, The fabric is one of cotton fabric, wool fabric, silk, or pure linen.

8. A hydrophobic fabric containing imide, characterized in that, The imine-containing hydrophobic fabric is prepared by any one of the imine-containing hydrophobic fabric preparation methods according to claims 1 to 7.

9. The application of the imide-containing hydrophobic fabric as described in claim 8, characterized in that, The imide-containing hydrophobic fabric is used for waterproofing and oil-water separation.

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