A jacket made of water-repellent and oil-repellent fabric and a preparation method thereof

Abstract

The invention discloses a jacket made of water-repellent and oil-repellent fabric and a preparation method thereof. Nano-alumina and a hydrogen-containing polymethylsiloxane solution are mixed and then a base fabric is soaked. After the base fabric is soaked, a mixed solution of PU resin, hydrogen-containing polymethylsiloxane solution and a metal catalyst is sprayed on the base fabric. The nano-alumina and the PU resin can fasten and support the hydrogen-containing polymethylsiloxane, thereby improving the structural tightness of the hydrogen-containing polymethylsiloxane, enhancing the wear resistance and hydrolysis resistance of the hydrogen-containing polymethylsiloxane, and making the water-repellent and oil-repellent textile have wear resistance and hydrolysis resistance, thereby solving the defect that the water-repellent and oil-repellent textile in the prior art has insufficient wear resistance and hydrolysis resistance. When the base fabric is soaked in the water-repellent and oil-repellent treatment agent, ultrasonic treatment is performed, so that the water-repellent and oil-repellent treatment agent can penetrate deeper into the fiber interior to enhance the adhesion of the treatment agent on the fiber, thereby improving the durability of the water-repellent and oil-repellent effect.

Description

Technical Field

[0001] The invention relates to the technical field of fabric treatment, in particular to a method for treating fabric with inorganic compounds, and in particular to a jacket made of water- and oil-repellent fabric and a preparation method thereof. Background Art

[0002] Water- and oil-repellent fabrics are made by adding special coatings or treatments to the surface of the fabric to reduce its surface tension and form low surface energy. This allows water and oil to remain on the surface of the fabric in the form of water droplets or oil droplets without any external force, thereby achieving the water- and oil-repellent effect.

[0003] Water and oil repellent treatment is achieved by reducing the surface tension of the fabric, making it lower than the surface tension of various water and oils. This makes it difficult for water and oil to penetrate into the inner layer of the fabric when they drop onto the surface of the fabric. Instead, they remain on the surface of the fabric in the form of beads, thus achieving water and oil repellent effect.

[0004] The jacket fabric treated with water and oil repellent can form a waterproof and oil-proof film, which can repel water, oil and dirt. This treatment not only improves the protective performance of the jacket, but also maintains the breathability and feel of the fabric.

[0005] Currently commonly used water- and oil-repellent finishing agents include fluorine finishing agents and silane finishing agents. Fluorine finishing agents have water- and oil-repellent effects and are long-lasting. However, fluorine compounds have certain effects on the environment and the human body and do not meet environmental protection requirements. Although silane finishing agents are slightly inferior to fluorine finishing agents in water- and oil-repellent effects, they are more environmentally friendly and have human environmental protection. However, since the bonding effect of silane finishing agents with fabrics is slightly poor, the finishing coating will fall off or be damaged after repeated washing and friction with the environment, making the water- and oil-repellent effect worse.

[0006] Therefore, it is necessary to improve the water-repellent and oil-repellent jacket in the prior art to solve the above problems. Summary of the invention

[0007] The invention overcomes the shortcomings of the prior art and provides a method for preparing a jacket made of water- and oil-repellent fabric.

[0008] To achieve the above object, the technical solution adopted by the present invention is: a method for preparing a jacket made of water-repellent and oil-repellent fabric, comprising the following steps:

[0009] S1: adding nano-alumina particles into a hydrogen-containing polymethylsiloxane solution and stirring to obtain a water- and oil-repellent treatment agent;

[0010] S2: soaking the base fabric in the water- and oil-repellent treatment agent in S1 for 2-4 hours, performing ultrasonic treatment and ultraviolet irradiation treatment during the soaking process, taking out and drying to obtain a water- and oil-repellent fabric;

[0011] S3: adding the PU resin and hydrogenated polymethylsiloxane solution into the DMF solvent, and adding a metal catalyst into the mixed solution, stirring for 1-2 hours to obtain a polyurethane modified solution;

[0012] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, and drying after spraying for 30-60 minutes to obtain a jacket made of the water- and oil-repellent fabric.

[0013] In a preferred embodiment of the present invention, the base fabric in S2 is a nylon / polyester woven fabric, and the weaving pattern is a twill pattern.

[0014] In a preferred embodiment of the present invention, the diameter of the nano-alumina particles is 40-80 nm, and the stirring time is 45-60 min.

[0015] In a preferred embodiment of the present invention, the solute of the hydrogenated polymethylsiloxane solution is ethanol, the concentration of the hydrogenated polymethylsiloxane solution is 35-40%, and the mass ratio of the nano-alumina particles to the hydrogenated polymethylsiloxane solution is 1:10-20.

[0016] In a preferred embodiment of the present invention, the frequency of the ultrasonic treatment is 60-80kHz, and the wavelength of the ultraviolet light of the ultraviolet treatment is 280-300nm.

[0017] In a preferred embodiment of the present invention, the base fabric is soaked multiple times in batches during the soaking process, the number of soaking times is 12-16 times, and the soaking time each time is 5-10 minutes.

[0018] In a preferred embodiment of the present invention, the concentration of the nano-aluminum oxide in the water- and oil-repellent treatment agent is adjusted during each immersion of the base fabric, and as the number of immersions increases, the concentration of the nano-aluminum oxide first decreases and then increases.

[0019] In a preferred embodiment of the present invention, the concentration of the hydrogenated polymethylsiloxane solution in S3 is 35-40%, and the mass ratio of the PU resin, the hydrogenated polymethylsiloxane solution, the DMF solvent and the metal catalyst is 5-8:12-15:20-30:2-4.

[0020] In a preferred embodiment of the present invention, the metal catalyst in S3 is rhodium, and the particle diameter of the metal catalyst is 200nm-500nm.

[0021] In order to achieve the above-mentioned purpose, the second set of technical solutions adopted by the present invention is: a jacket made of water-repellent and oil-repellent fabric, which is prepared based on a method for preparing a jacket made of water-repellent and oil-repellent fabric.

[0022] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0023] (1) The present invention provides a method for preparing a jacket made of water-repellent and oil-repellent fabric, comprising the steps of mixing nano-alumina with a hydrogenated polymethylsiloxane solution and then soaking a base fabric in the mixture, spraying the base fabric with a mixture of PU resin, hydrogenated polymethylsiloxane solution and a metal catalyst after the base fabric has been soaked, wherein the nano-alumina and PU resin can fasten and support the hydrogenated polymethylsiloxane, thereby improving the structural tightness of the hydrogenated polymethylsiloxane compared to the water-repellent and oil-repellent textiles in the prior art, thereby enhancing the wear resistance and hydrolysis resistance of the hydrogenated polymethylsiloxane, and making the water-repellent and oil-repellent textiles wear-resistant and hydrolysis-resistant, thereby solving the defect that the water-repellent and oil-repellent textiles in the prior art have insufficient wear resistance and hydrolysis resistance.

[0024] (2) In the present invention, when the base fabric is immersed in the water- and oil-repellent treatment agent, ultrasonic treatment and ultraviolet irradiation treatment are performed. The ultrasonic treatment produces tiny bubbles and local high temperature, and the ultraviolet treatment can enhance the durability of the coating. Compared with the prior art, the water- and oil-repellent treatment agent can penetrate deeper into the fiber to enhance the adhesion of the treatment agent on the fiber, thereby improving the durability of the water- and oil-repellent effect.

[0025] (3) In the present invention, the base fabric is immersed in batches for multiple times during the immersion process. As the number of immersions increases, the concentration of nano-aluminum oxide first decreases and then increases. Through the batch immersion, a uniform and dense water-repellent and oil-repellent coating can be gradually formed on the base fabric. The gradient structure coating formed helps to improve the uniformity and adhesion of the coating, and can resist the stress during washing and friction, thereby improving the retention of the textile during washing and friction.

[0026] (4) In the present invention, a coating layer formed by PU resin and rhodium catalyst is added outside the water-repellent and oil-repellent treatment agent. The rhodium catalyst can promote the chemical bonding between the PU resin and the hydrogen-containing polymethylsiloxane and the base fabric. Compared with the prior art, the adhesion of the coating can be improved. The high wear resistance and high elasticity of the PU resin can reduce the stress during the friction process, thereby improving the hydrolysis resistance and wear resistance of the textile. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a method step diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figure 1 As shown, a method for preparing a jacket made of water- and oil-repellent fabric comprises the following steps:

[0032] S1: adding nano-alumina particles into a hydrogen-containing polymethylsiloxane solution and stirring to obtain a water- and oil-repellent treatment agent;

[0033] S2: soaking the base fabric in the water- and oil-repellent treatment agent in S1 for 2-4 hours, performing ultrasonic treatment and ultraviolet irradiation treatment during the soaking process, taking out and drying to obtain a water- and oil-repellent fabric;

[0034] S3: adding the PU resin and hydrogenated polymethylsiloxane solution into the DMF solvent, and adding a metal catalyst into the mixed solution, stirring for 1-2 hours to obtain a polyurethane modified solution;

[0035] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying after spraying for 30-60 minutes, to obtain a jacket made of the water- and oil-repellent fabric.

[0036] The nano-alumina and the hydrogen-containing polymethylsiloxane solution are mixed and then the base fabric is soaked. After the base fabric is soaked, a mixed solution of PU resin, hydrogen-containing polymethylsiloxane solution and metal catalyst is sprayed on the base fabric. The nano-alumina and the PU resin can fasten and support the hydrogen-containing polymethylsiloxane, thereby improving the structural tightness of the hydrogen-containing polymethylsiloxane, enhancing the wear resistance and hydrolysis resistance of the hydrogen-containing polymethylsiloxane, and making the water-repellent and oil-repellent textiles wear-resistant and hydrolysis-resistant, thereby solving the defect of insufficient wear resistance and hydrolysis resistance of the water-repellent and oil-repellent textiles in the prior art.

[0037] The base fabric in S2 is nylon / polyester woven fabric, and the weaving pattern is a twill pattern. The twill pattern increases the surface roughness of the fabric, and when the fabric is combined with the coating, it can improve the bonding strength with the coating, making the fabric have better hydrolysis resistance and friction resistance. The twill pattern has better air permeability, which helps to improve wearing comfort, while not affecting the water and oil repellent effect. After combining with the coating, it can maintain the air permeability of the fabric.

[0038] The diameter of the nano-alumina particles is 40-80nm, and the stirring time is 45-60min. The small size of the nano-alumina particles helps them to be evenly dispersed in the hydrogenated polymethylsiloxane solution. Smaller particles are more easily surrounded by the solution, reducing the possibility of particle aggregation. Nano-sized particles have a higher specific surface area, which means that more nano-alumina particles can contact with other components in the solution, thereby increasing reactivity and interfacial interaction. Smaller nanoparticles can better fill the microstructure of the fabric to form a denser protective layer, thereby improving the water and oil repellent effect. Evenly dispersed nano-alumina particles can better combine with the fibers on the surface of the fabric, improving the adhesion and durability of the coating.

[0039] The solute of the hydrogenated polymethylsiloxane solution is ethanol, the concentration of the hydrogenated polymethylsiloxane solution is 35-40%, and the mass ratio between the nano-alumina particles and the hydrogenated polymethylsiloxane solution is 1:10-20. By controlling the mass ratio between the nano-alumina particles and the hydrogenated polymethylsiloxane solution, it is possible to ensure that the nano-particles are evenly dispersed in the solution and avoid aggregation, thereby improving the uniformity of the coating and the water and oil repellent effect. An appropriate amount of nano-alumina particles can increase the adhesion between the solution and the fabric, making the coating more solid and improving the durability of the water and oil repellent performance.

[0040] The frequency of ultrasonic treatment is 60-80kHz, and the wavelength of ultraviolet light for ultraviolet treatment is 280-300nm. Ultrasonic treatment produces tiny bubbles and local high temperatures. The shock waves generated when these bubbles burst help open the fiber structure of the fabric, allowing the water- and oil-repellent treatment agent to penetrate deeper into the fiber. The vibration energy of ultrasound can promote the interaction between the treatment agent molecules and the fiber surface, enhance the adhesion of the treatment agent on the fiber, and thus improve the durability of the water- and oil-repellent effect. Ultraviolet treatment can enhance the durability of the coating, allowing it to maintain good water- and oil-repellent properties after multiple washings and uses.

[0041] During the soaking process of the base fabric, multiple soakings are carried out in batches, the number of soakings is 12-16 times, and the soaking time for each soaking is 5-10 minutes. During each soaking process of the base fabric, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent is adjusted. As the number of soakings increases, the concentration of nano-aluminum oxide first decreases and then increases. By soaking in batches, a uniform and dense water-repellent and oil-repellent coating can be gradually formed on the base fabric. This progressive coating formation helps to improve the uniformity and adhesion of the coating. As the number of soakings increases, the concentration of nano-aluminum oxide first decreases and then increases. This change helps to form a more complex microstructure on the surface of the fabric, which may include smaller pores and more uniform distribution, thereby improving the water-repellent and oil-repellent properties.

[0042] The concentration of nano-alumina in the water-repellent and oil-repellent treatment agent is detected each time the immersion is performed. When the immersion times exceed half of the total immersion times, the concentration of nano-alumina in the water-repellent and oil-repellent treatment agent is increased by adding nano-alumina particles. The process of decreasing the concentration of nano-alumina in the water-repellent and oil-repellent treatment agent is symmetrical to the process of increasing the concentration.

[0043] The concentration of hydrogenated polymethylsiloxane solution in S3 is 35-40%, and the mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5-8:12-15:20-30:2-4. The appropriate mass ratio helps to improve the adhesion between the coating and the base fabric, ensuring that the coating can maintain its water and oil repellency after multiple washings and uses.

[0044] The metal catalyst in S3 is rhodium, and the particle diameter of the metal catalyst is 200nm-500nm. The presence of the catalyst helps to form a more uniform and dense coating, thereby improving the wear resistance and durability of water- and oil-repellent textiles. The catalyst can promote the chemical bonding between the PU resin and the hydrogen-containing polymethylsiloxane and the base fabric, and improve the adhesion of the coating. The PU resin can form a uniform protective layer that covers the surface of the fabric and provides a water- and oil-repellent barrier. This protective layer can prevent water and oil molecules from penetrating into the interior of the fabric. The PU resin has good flexibility and can form a resilient coating on the surface of the fabric. This flexibility helps the coating maintain its integrity under various conditions of use, thereby maintaining water- and oil-repellent properties.

[0045] A jacket made of water- and oil-repellent fabric is prepared based on a method for preparing a jacket made of water- and oil-repellent fabric. Embodiment 1

[0046] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0047] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:5, and stirring to obtain a water- and oil-repellent treatment agent;

[0048] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 12 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0049] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0050] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 2

[0051] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0052] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:10, and stirring to obtain a water- and oil-repellent treatment agent;

[0053] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 12 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0054] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0055] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 3

[0056] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0057] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:15, and stirring to obtain a water- and oil-repellent treatment agent;

[0058] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 12 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0059] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0060] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 4

[0061] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0062] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:20, and stirring to obtain a water- and oil-repellent treatment agent;

[0063] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 12 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0064] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0065] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 5

[0066] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0067] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:25, and stirring to obtain a water- and oil-repellent treatment agent;

[0068] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 12 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0069] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0070] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 6

[0071] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0072] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:15, and stirring to obtain a water- and oil-repellent treatment agent;

[0073] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 10, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0074] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0075] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 7

[0076] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0077] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:15, and stirring to obtain a water- and oil-repellent treatment agent;

[0078] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 14 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0079] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0080] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 8

[0081] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0082] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:15, and stirring to obtain a water- and oil-repellent treatment agent;

[0083] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 16 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0084] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0085] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric. Embodiment 9

[0086] This embodiment prepares a jacket made of water- and oil-repellent fabric, including the following steps:

[0087] S1: adding nano-alumina particles with a particle diameter of 60 nm to a 40% concentration of hydrogen-containing polymethylsiloxane solution, wherein the mass ratio of the nano-alumina particles to the hydrogen-containing polymethylsiloxane solution is 1:15, and stirring to obtain a water- and oil-repellent treatment agent;

[0088] S2: soaking the nylon / polyester woven fabric with twill pattern in the water-repellent and oil-repellent treatment agent in S1 for 3 hours, performing ultrasonic treatment with a frequency of 70kHz and ultraviolet irradiation treatment with a wavelength of 300nm during the soaking process, soaking the nylon / polyester woven fabric in batches for multiple times during the soaking process, the number of soaking times is 18 times, and the soaking time each time is 8 minutes. As the number of soaking times increases, the concentration of nano-aluminum oxide in the water-repellent and oil-repellent treatment agent first decreases and then increases, and the fabric is taken out and dried to obtain a water-repellent and oil-repellent fabric;

[0089] S3: PU resin and 35% concentration of hydrogenated polymethylsiloxane solution are added to DMF solvent, and a rhodium catalyst with a particle diameter of 400 nm is added to the mixed solution. The mass ratio of PU resin, hydrogenated polymethylsiloxane solution, DMF solvent and metal catalyst is 5:12:20:3. Stir for 2 hours to obtain a polyurethane modified solution;

[0090] S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 45 minutes, combining the dried water- and oil-repellent fabric with the outer layer of the jacket to obtain a jacket made of the water- and oil-repellent fabric.

[0091] Comparative Example 1

[0092] This comparative example prepares a jacket made of water- and oil-repellent fabric, and the preparation process is as follows:

[0093] S1: The twill-patterned nylon / polyester woven fabric was immersed in a 40% concentration of hydrogenated polymethylsiloxane solution for 3 h;

[0094] S2: Drying the nylon / polyester woven fabric soaked in S1, and combining the dried nylon / polyester woven fabric with the outer layer of the jacket to obtain a jacket made of water- and oil-repellent fabric.

[0095] Comparative experiment

[0096] The samples of Examples 1 to 9 and Comparative Example 1 were taken with the same mass, and the water repellency and oil repellency retention rates before and after washing were respectively tested after washing the samples were washed 100 times. The samples were subjected to a friction resistance test based on GB / T 21196.3-2007 standard, the mass of the samples before and after friction was measured, and the mass wear rate was calculated. The test results are shown in Table 1.

[0097] Table 1 Hydrolysis resistance and friction resistance test data of Examples 1 to 9 and Comparative Example 1

[0098]

[0099] It can be seen from Table 1 that the water-repellent and oil-repellent retention rates of Examples 1 to 9 are all greater than the water-repellent and oil-repellent retention rate of Comparative Example 1, and the mass wear rates of Examples 1 to 9 are all less than the mass wear rate of Comparative Example 1. The preparation method of the water-repellent and oil-repellent textile of the present application is superior.

[0100] In embodiment one to five, as the mass ratio between nano alumina particles and hydrogenated polymethylsiloxane solution increases gradually, the water-repellent and oil-repellent of sample keeps increasing first and then decreasing, and the mass wear of sample decreases first and then increases, because nano alumina particles can increase the microscopic roughness of surface, which is advantageous for forming super-hydrophobic and super-oleophobic surfaces. When the mass ratio of silicon dioxide particles and hydrogenated polymethylsiloxane solution is low, enough roughness may not be formed, resulting in poor water-repellent and oil-repellent performance. As the mass ratio increases, the surface roughness increases, and the water-repellent and oil-repellent performance improves. When the ratio of nano alumina particles is too high, excessive accumulation may be formed on the surface, which not only reduces the coverage of PDMS, but also may reduce the water-repellent and oil-repellent performance because of the space between particles, and the best embodiment is embodiment three.

[0101] In embodiment three and embodiment six to nine, as the soaking times of nylon / polyester woven fabric in the soaking process of water-repellent and oil-repellent treatment agent gradually increase, the water-repellent and oil-repellent retention of the sample increases first and then decreases, and the mass wear of the sample decreases first and then increases, because by soaking in batches, a uniform and dense water-repellent and oil-repellent coating can be gradually formed on the base fabric. This progressive coating formation helps to improve the uniformity and adhesion of the coating. As the number of soakings increases, the concentration of nano-alumina decreases first and then increases, and this change helps to form a more complex microstructure on the surface of the fabric, thereby improving the water-repellent and oil-repellent performance and being able to have better water-repellent and oil-repellent retention ability, but as the number of soakings increases, it will cause the stress inside the coating to increase, thereby reducing the water-repellent and oil-repellent retention rate; in the initial stage, as the number of soakings increases, the thickness of the coating may increase, and the adhesion is enhanced, which helps to improve the wear resistance. However, if the coating is too thick, it will cause the coating to become fragile and easy to fall off during friction, thereby increasing the wear rate. The preferred embodiment is embodiment seven.

[0102] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A method for preparing a jacket made of water- and oil-repellent fabric, characterized in that: The following steps are involved: S1: adding nano-alumina particles into a hydrogen-containing polymethylsiloxane solution and stirring to obtain a water- and oil-repellent treatment agent; S2: soaking the base fabric in the water-repellent and oil-repellent treatment agent in S1 for 2-4h, performing ultrasonic treatment and ultraviolet irradiation treatment during the soaking process, taking out and drying to obtain the water-repellent and oil-repellent fabric; the solute of the hydrogen-containing polymethylsiloxane solution is ethanol, the concentration of the hydrogen-containing polymethylsiloxane solution is 35-40%, the mass ratio between the nano-alumina particles and the hydrogen-containing polymethylsiloxane solution is 1:10-20, and the base fabric is soaked in batches for multiple times during the soaking process, the number of soaking times is 12-16 times, and the soaking time for each time is 5-10 minutes. During each soaking process of the base fabric, the concentration of the nano-alumina in the water-repellent and oil-repellent treatment agent is adjusted, and as the number of soaking times increases, the concentration of the nano-alumina first decreases and then increases; S3: adding the PU resin and hydrogenated polymethylsiloxane solution into the DMF solvent, and adding a metal catalyst into the mixed solution, stirring for 1-2 hours to obtain a polyurethane modified solution; S4: spraying the polyurethane modified solution in S3 onto the water- and oil-repellent fabric in S2, drying the fabric after spraying for 30-60 minutes, combining the dried water- and oil-repellent fabric with the outer layer of a jacket to obtain a jacket made of the water- and oil-repellent fabric.

2. The method for preparing a jacket made of water- and oil-repellent fabric according to claim 1, characterized in that: The base fabric in S2 is a nylon / polyester woven fabric, and the weaving pattern is a twill pattern.

3. The method for preparing a jacket made of water- and oil-repellent fabric according to claim 1, characterized in that: The diameter of the nano-alumina particles is 40-80 nm, and the stirring time is 45-60 min.

4. The method for preparing a jacket made of water- and oil-repellent fabric according to claim 1, characterized in that: The frequency of the ultrasonic treatment is 60-80kHz, and the wavelength of the ultraviolet light of the ultraviolet treatment is 280-300nm.

5. The method for preparing a jacket made of water- and oil-repellent fabric according to claim 1, characterized in that: The concentration of the hydrogen-containing polymethylsiloxane solution in S3 is 35-40%, and the mass ratio of the PU resin, the hydrogen-containing polymethylsiloxane solution, the DMF solvent and the metal catalyst is 5-8:12-15:20-30:2-4.

6. The method for preparing a jacket made of water- and oil-repellent fabric according to claim 1, characterized in that: The metal catalyst in S3 is rhodium, and the particle diameter of the metal catalyst is 200nm-500nm.

7. A jacket made of water-repellent and oil-repellent fabric, characterized in that: The method for preparing a jacket made of water- and oil-repellent fabric according to any one of claims 1 to 6 is used to prepare the jacket.

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