Super-hydrophobic self-cleaning stain-repellent flannel fabric and preparation method thereof

Abstract

The application discloses a kind of super-hydrophobic self-cleaning dirt-repellent flannel fabric and preparation method thereof, design flannel fabric technical field, including the following steps: preparation nano self-expanding fiber, first hydrophobic fiber, second hydrophobic fiber, take nano self-expanding fiber and first hydrophobic fiber and second hydrophobic fiber are coated, get composite yarn, preparation nano self-expanding yarn, by yarn crossing weaving get base cloth and form pile layer on the top of base cloth.The application is set by two kinds of super-hydrophobic degree yarn fiber, so that flannel fabric can adjust super-hydrophobic degree, and when flannel fabric surface adheres stain, leak out second hydrophobic fiber, so that the super-hydrophobicity of flannel fabric at stain is lower than that at other positions, when fabric surface is subjected to water drop flushing, water drop rolling process tends to this position, so that stain is easy to pass more water bead, facilitate to effectively clean the stain, realize fabric self-cleaning ability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flannel fabrics, in particular to a super-hydrophobic self-cleaning stain-repellent flannel fabric and a preparation method thereof. BACKGROUND

[0002] Flannel is a soft and fluffy wool fabric woven with coarse wool yarn. Cotton fibers or wool fibers are spun into mixed yarn, and the fabric is woven, shrunk, and brushed to form a layer of fluff on the surface, providing good thermal insulation. However, the existing flannel fabric has poor hydrophobicity and is prone to sticking and staining, which reduces the use of flannel fabric.

[0003] The defects of the existing flannel fabric are:

[0004] 1. The patent document CN110747567B mainly considers how to improve the elasticity and wrinkle resistance of flannel fabric, without considering how to improve the hydrophobicity and self-cleaning stain resistance of flannel fabric;

[0005] 2. The patent document CN104562715B mainly considers how to improve the thermal insulation and softness of flannel fabric, but does not consider how to further improve the hydrophobicity and waterproofness of flannel fabric;

[0006] 3. The patent document CN110144730B mainly considers how to make flannel fabric have a fragrance effect, without considering how to improve the expansion effect and temperature sensitivity of nano self-expanding fibers. SUMMARY

[0007] The present application aims to provide a super-hydrophobic self-cleaning stain-repellent flannel fabric and a preparation method thereof to solve the problems mentioned in the background.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solution: a preparation method of a super-hydrophobic self-cleaning stain-repellent flannel fabric, comprising the following steps:

[0009] Preparation of nano self-expanding fibers, first hydrophobic fibers and second hydrophobic fibers;

[0010] Take the nano self-expanding fibers to coat, roving and spinning processes on the first hydrophobic fibers and the second hydrophobic fibers, and obtain a composite yarn;

[0011] Take the nano self-expanding fibers to twist, and obtain a nano self-expanding yarn;

[0012] Take the composite yarn as the first warp and weft, and the nano self-expanding yarn as the second warp, and use the first warp, the second warp and the weft to cross-weave, and obtain a base cloth;

[0013] The top of the base cloth is subjected to raising, cutting and carding to form a pile layer on the top of the base cloth.

[0014] Preferably, the mass ratio of the first hydrophobic fiber to the second hydrophobic fiber in the composite yarn is 1:1.

[0015] Preferably, when the nano self-expanding fiber coats the first hydrophobic fiber and the second hydrophobic fiber, the winding number ratio of the nano self-expanding fiber on the surface of the second hydrophobic fiber to the first hydrophobic fiber is (3-5):1.

[0016] Preferably, during the weaving of the base cloth, the density ratio of the first warp to the second warp is (2-5):1.

[0017] Preferably, the preparation of the first hydrophobic fiber comprises the following steps:

[0018] Cotton fibers, polyester fibers and spandex fibers are blended to obtain composite fibers, and the mass ratio of cotton fibers, polyester fibers and spandex fibers in the composite fibers is (3-8):(2-5):(2-4);

[0019] The composite fibers are washed with deionized water, and then dried after washing;

[0020] A first modification solution is prepared by dissolving a first hydrophobic material in a solvent, and the first modification solution is subjected to ultrasonic mixing treatment, wherein the first hydrophobic material includes at least one of octadecyl trimethoxysilane, octadecyl triethoxysilane and tridecafluorooctyl triethoxysilane, the solvent includes one of isopropyl ketone and ethanol, and the mass ratio of the first hydrophobic material to the solution in the first modification solution is (1-3):100;

[0021] Half of the dried composite fibers are immersed in the first modification solution, and the immersion is carried out at 24-55℃ for 1-1.5h;

[0022] After immersion, the first modified fiber is obtained, and the first modified fiber is baked at 85-110℃ for 10-15min;

[0023] The first modified fiber is washed with deionized water, and then dried after washing to obtain the first hydrophobic fiber.

[0024] Preferably, the preparation of the second hydrophobic fiber comprises the following steps:

[0025] A second modification solution is prepared by dissolving a second hydrophobic material in a solvent, and the second modification solution is subjected to ultrasonic mixing treatment, wherein the second hydrophobic material includes at least one of dodecyltrimethoxysilane and methyltriethoxysilane, the solvent includes one of isopropyl alcohol and ethanol, and the mass ratio of the second hydrophobic material to the solution in the second modification solution is (1-3): 100;

[0026] The other half of the washed and dried composite fibers is immersed in the second modification solution, and the immersion is performed at 24-40°C for 0.5-1h;

[0027] After the immersion, the second modified fibers are obtained, and the second modified fibers are baked at 65-85°C for 10-15min;

[0028] The second modified fibers are washed with deionized water, and after the washing, the second modified fibers are dried to obtain second hydrophobic fibers.

[0029] Preferably, the preparation of the nano self-expanding fiber includes the following steps:

[0030] Acrylonitrile and polyethylene terephthalate are mixed to obtain a mixed resin matrix;

[0031] The mixed resin matrix is subjected to hydrophobic modification treatment using a silane coupling agent, and after washing and drying, a modified mixed resin matrix is obtained;

[0032] The expanded powder is prepared into a thermal expansion microsphere, wherein the expanded powder includes at least one of expanded graphite or expanded carbon nanotube;

[0033] The conversion particles are added to the modified mixed resin matrix and uniformly mixed to obtain a shell substrate, wherein the conversion particles include at least one of strontium titanate, titanium dioxide, and titanium sesquioxide;

[0034] The shell substrate and the thermal expansion microsphere are jointly added to a coaxial type spinning machine to perform melt spinning to obtain a nano self-expanding fiber, and in the nano self-expanding fiber, the ratio of the thickness of the shell substrate to the diameter size of the nano self-expanding fiber is 1:(1-4).

[0035] Preferably, the thermal expansion microsphere in the nano self-expanding fiber further includes the following steps:

[0036] Isopentane is added to the thermal expansion powder and uniformly mixed to obtain a thermal expansion microsphere core;

[0037] The surface of the thermal expansion microsphere is subjected to low-temperature plasma surface activation treatment;

[0038] A micrometer thermal conductive coating is coated on the surface of the thermal microsphere after the surface activation treatment.

[0039] Preferably, the micrometer heat-conductive coating comprises an alumina micrometer coating or a copper oxide micrometer coating.

[0040] The super-hydrophobic self-cleaning dirt-repellent flannel fabric is prepared by the preparation method of the super-hydrophobic self-cleaning dirt-repellent flannel fabric.

[0041] Compared with the prior art, the present application has the following advantages:

[0042] 1、The present application uses different substances to modify the composite fibers, obtains two kinds of super-hydrophobic fibers with different hydrophobic properties, and prepares a nanometer self-expanding fiber to cover the two kinds of super-hydrophobic fibers into yarn for fabric preparation, so that the yarn has two different degrees of super-hydrophobic ability at the same time, and the flannel fabric can adjust the degree of super-hydrophobicity, when the flannel fabric is in a clean state, the nanometer self-expanding fiber is in an expanded state, and then the outer wall of the second hydrophobic fiber is completely covered and the first hydrophobic fiber is equally spaced, when the surface of the flannel fabric is adhered with dirt, the dirt blocks the nanometer self-expanding fiber below, so that the flannel fabric at this position lacks light irradiation compared with other positions, under the action of the conversion particles, the temperature of the nanometer self-expanding fiber at the dirt position is lower than that at other positions, and then the nanometer self-expanding fiber at the dirt position is in a shrinking state, so that it cannot completely cover the second hydrophobic fiber with weak super-hydrophobic property, and the super-hydrophobicity of the flannel fabric at the dirt position is lower than that at other positions, when the surface of the fabric is subjected to water drop flushing, the water drop rolling process tends to this position, so that the dirt position is more likely to pass through more water droplets, and the dirt position is effectively cleaned, and the fabric self-cleaning ability is realized.

[0043] 2、The present application adds nanometer self-expanding fibers during the weaving process of the flannel fabric, can change the microstructure of the flannel fabric, make the microstructure of the flannel fabric have protruding structures, and then increase the roughness of the flannel fabric, so as to improve the super-hydrophobic property and waterproof property of the flannel fabric.

[0044] 3、The present application uses the method of mixing isopentane with expanded powder to prepare the core of the heat-expandable microsphere, which is conducive to reducing the expansion temperature of the heat-expandable microsphere, and facilitating the nanometer self-expanding fiber to present an expanded state, and then is conducive to improving the roughness of the flannel fabric, the heat-expandable microsphere is subjected to low-temperature plasma surface activation treatment, which is conducive to improving the temperature sensitivity of the heat-expandable microsphere, and then facilitating the position determination of the dirt on the surface of the fabric, so as to effectively clean the dirt at this position, and the heat-expandable microsphere is coated with a micrometer heat-conductive coating, which is conducive to improving the heat conduction ability of the shell of the heat-expandable microsphere, and further improving the temperature sensitivity of the nanometer self-expanding fiber.

[0045] 4. The present invention uses a continuous coating method to coat the surfaces of the first and second hydrophobic fibers, so that the first and second hydrophobic fibers have nanopores, which is beneficial to improve the breathability of the fabric, and the hydrophobic effect of the flannel fabric is maintained under the coating of nano self-expanding fibers with superhydrophobic effect. Detailed Implementation

[0046] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] A method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric includes the following steps:

[0048] Prepare nano-self-expanding fibers, a first hydrophobic fiber, and a second hydrophobic fiber;

[0049] The composite yarn is obtained by coating the first and second hydrophobic fibers with nano-self-expanding fibers, followed by roving and spinning processes.

[0050] Nano self-expanding fibers are twisted to obtain nano self-expanding yarn;

[0051] Composite yarns are used as the first warp and weft, and nano self-expanding yarn is used as the second warp. The first warp, second warp and weft are interwoven to obtain the base fabric.

[0052] The top of the base fabric is treated with napping, shearing, and combing to form a pile layer on top of the base fabric.

[0053] Example 1,

[0054] A method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric includes the following steps:

[0055] Prepare nano-self-expanding fibers, a first hydrophobic fiber, and a second hydrophobic fiber;

[0056] The preparation of the first hydrophobic fiber includes the following steps: cotton fiber, polyester fiber and spandex fiber are blended to obtain composite fiber, and the mass ratio of cotton fiber, polyester fiber and spandex fiber in the composite fiber is 5:2:2.

[0057] The composite fibers are cleaned with deionized water, and then removed and dried.

[0058] The first hydrophobic material is dissolved in a solvent to prepare a first modified solution, and the first modified solution is subjected to ultrasonic mixing treatment, wherein the first hydrophobic material is a mixture of octadecyltrimethoxysilane and octadecyltriethoxysilane, the mass ratio of octadecyltrimethoxysilane to octadecyltriethoxysilane is 1:1, the solvent is isopropyl alcohol, and the mass ratio of the first hydrophobic material to the solution in the first modified solution is 1:100;

[0059] Half of the cleaned and dried composite fibers are immersed in the first modified solution, and the immersion is carried out at 50℃ for 1h;

[0060] After immersion, the first modified fiber is obtained, and the first modified fiber is placed in a 100℃ oven for 10min;

[0061] The first modified fiber is washed with deionized water, and after washing, it is dried to obtain the first hydrophobic fiber;

[0062] The preparation of the second hydrophobic fiber includes the following steps:

[0063] The second hydrophobic material is dissolved in a solvent to prepare a second modified solution, and the second modified solution is subjected to ultrasonic mixing treatment, wherein the second hydrophobic material is dodecyltrimethoxysilane, the solvent is isopropyl alcohol, and the mass ratio of the second hydrophobic material to the solution in the second modified solution is 2:100;

[0064] The other half of the cleaned and dried composite fibers are immersed in the second modified solution, and the immersion is carried out at 35℃ for 0.6h;

[0065] After immersion, the second modified fiber is obtained, and the second modified fiber is placed in an 80℃ oven for 10min;

[0066] The second modified fiber is washed with deionized water, and after washing, it is dried to obtain the second hydrophobic fiber;

[0067] The preparation of the nano self-expanding fiber includes the following steps:

[0068] Acrylonitrile and polyethylene terephthalate are mixed to obtain a mixed resin matrix, and the mass ratio of acrylonitrile to polyethylene terephthalate in the mixed resin matrix is 5:3;

[0069] The mixed resin matrix is subjected to hydrophobic modification treatment using a silane coupling agent, and after cleaning and drying, a modified mixed resin matrix is obtained, wherein the silane coupling agent used is 3-aminopropyltriethoxysilane, and the amount of silane coupling agent is 2% of the mass of the mixed resin matrix to be treated;

[0070] The expanded powder is used to prepare a thermal expansion microsphere, wherein the expanded powder is an expanded carbon nanotube, and the preparation of the expanded microsphere includes the following steps:

[0071] Add isopentane to the heat-expandable powder and mix uniformly to obtain a heat-expandable microsphere inner core, and the isopentane accounts for 3% of the total weight of the heat-expandable microsphere inner core,

[0072] The heat-expandable microspheres are prepared by an emulsion polymerization method or a spray drying method, for example, the heat-expandable microspheres are prepared by an emulsion polymerization method, and the preparation process is as follows: water, a dispersing agent, and a stabilizer are mixed to prepare an aqueous phase solution, the dispersing agent is silicon dioxide, the stabilizer is polyvinylpyrrolidone, the addition amount of the dispersing agent is 5% of the total mass of the aqueous phase solution, and the addition amount of the stabilizer is 5% of the total mass of the aqueous phase solution;

[0073] The shell material, a crosslinking agent, an initiator, and the heat-expandable microsphere inner core are mixed to prepare an oil phase emulsion, and the raw materials and their mass percentage ratios in the shell material are as follows: styrene: butadiene: butyl acrylate: EVA: polyurethane is 40%: 25%: 15%: 10%: 10%, the crosslinking agent is p-divinylbenzene, the initiator is benzoyl peroxide, the addition amount of the crosslinking agent in the oil phase emulsion is 1.5% of the total mass of the oil phase solution, the addition amount of the initiator is 2.5% of the total mass of the oil phase solution, and the addition amount of the heat-expandable microsphere inner core is 42% of the total mass of the oil phase solution;

[0074] The aqueous phase solution and the oil phase solution are blended, and a polymerization reaction is performed at 75°C to obtain heat-expandable microsphere primary bodies;

[0075] The surface of the heat-expandable microsphere primary bodies is subjected to low-temperature plasma surface activation treatment, which is beneficial to improving the shell surface structure of the heat-expandable microsphere primary bodies and to improving the heat conduction capacity of the shell to a certain extent;

[0076] The surface of the heat-expandable microsphere primary bodies subjected to the surface activation treatment is coated with a micron heat-conductive coating, and the micron heat-conductive coating is an aluminum oxide coating, and the heat-expandable microspheres are formed after drying, and the setting of the micron heat-conductive coating is beneficial to improving the heat conduction capacity and efficiency of the heat-expandable microspheres;

[0077] The conversion particles are added to the modified mixed resin matrix and uniformly mixed to obtain a shell base material, wherein the conversion particles include strontium titanate and titanium dioxide, and the mass ratio of strontium titanate to titanium dioxide is 3:5;

[0078] The shell base material and the heat-expandable microspheres are added to a coaxial spinning machine to perform melt spinning to obtain nanometer self-expanding fibers, and in the nanometer self-expanding fibers, the ratio of the thickness of the shell base material to the diameter size of the nanometer self-expanding fibers is 1:4;

[0079] The nanometer self-expanding fibers are used to coat, rove, and spin the first hydrophobic fiber and the second hydrophobic fiber to obtain a composite yarn;

[0080] The number of winding turns of the nanometer self-expanding fiber on the surface of the second hydrophobic fiber and the first hydrophobic fiber is 3:1 when the nanometer self-expanding fiber is wrapped around the first hydrophobic fiber and the second hydrophobic fiber.

[0081] The nanometer self-expanding fiber is twisted to obtain a nanometer self-expanding yarn.

[0082] The composite yarn is taken as the first warp and weft yarns, and the nanometer self-expanding yarn is taken as the second warp yarn. The first warp yarn, the second warp yarn, and the weft yarn are interlaced to obtain the base cloth. During the interlacing process, the directions of the first warp yarn and the second warp yarn are clockwise rotation by 45° in the horizontal straight line direction, and the direction of the weft yarn is counterclockwise rotation by 45° in the horizontal straight line direction.

[0083] The density ratio of the first warp yarn to the second warp yarn is 3:1 during the interlacing process of the base cloth.

[0084] The top of the base cloth is subjected to raising, cutting, and combing to form a pile layer on the top of the base cloth. The pile length in the pile layer is 3mm. The pile layer is subjected to heat setting treatment. The pile tips in the pile layer after the heat setting treatment are inclined downward, thereby facilitating the rolling of water droplets.

[0085] Further, the composite yarn is prepared by using the composite fiber, and then the first warp and weft yarns are prepared. The flannel fabric has good elasticity and wear resistance while having the skin-friendly and soft characteristics. The durability of the flannel fabric is improved. The first hydrophobic fiber and the second hydrophobic fiber are obtained by modifying the composite fiber. The two hydrophobic yarns with different hydrophobic capacities are taken as the first warp and second warp yarns, respectively. The yarns for weaving the flannel fabric have good hydrophobic performance and the function of automatically adjusting the hydrophobic capacity. The flannel fabric has a certain intelligence. The conversion particles are added to the shell base material during the preparation of the nanometer self-expanding fiber. The conversion from light energy to heat energy is realized. The thermal expansion microspheres remain in the expanded state, thereby obtaining the nanometer self-expanding fiber in the expanded state.

[0086] Example two,

[0087] A preparation method of a super-hydrophobic self-cleaning and stain-repellent flannel fabric, comprising the following steps:

[0088] The nanometer self-expanding fiber, the first hydrophobic fiber, and the second hydrophobic fiber are prepared.

[0089] The preparation of the first hydrophobic fiber comprises the following steps: cotton fiber, polyester fiber, and spandex fiber are blended to obtain a composite fiber. The mass ratio of the cotton fiber, the polyester fiber, and the spandex fiber in the composite fiber is 5:2:2.

[0090] The composite fiber is cleaned with deionized water, and after cleaning, it is taken out and dried;

[0091] A first modification solution is prepared by dissolving a first hydrophobic material in a solvent, and the first modification solution is ultrasonically mixed, wherein the first hydrophobic material is a mixture of octadecyl trimethoxysilane and octadecyl triethoxysilane, the mass ratio of octadecyl trimethoxysilane to octadecyl triethoxysilane is 1:1, the solvent is isopropyl acetone, and the mass ratio of the first hydrophobic material to the solution in the first modification solution is 2:100;

[0092] Half of the cleaned and dried composite fiber is immersed in the first modification solution, and immersed at 50°C for 1h;

[0093] After immersion, the first modified fiber is taken out and placed in a 100°C oven for 10min;

[0094] The first modified fiber is washed with deionized water, and after washing, it is taken out and dried to obtain the first hydrophobic fiber;

[0095] The preparation of the second hydrophobic fiber comprises the following steps:

[0096] A second modification solution is prepared by dissolving a second hydrophobic material in a solvent, and the second modification solution is ultrasonically mixed, wherein the second hydrophobic material is dodecyl trimethoxysilane, the solvent is isopropyl acetone, and the mass ratio of the second hydrophobic material to the solution in the second modification solution is 2:100;

[0097] The other half of the cleaned and dried composite fiber is immersed in the second modification solution, and immersed at 35°C for 0.6h;

[0098] After immersion, the second modified fiber is taken out and placed in an 80°C oven for 10min;

[0099] The second modified fiber is washed with deionized water, and after washing, it is taken out and dried to obtain the second hydrophobic fiber;

[0100] The preparation of the nano self-expanding fiber comprises the following steps:

[0101] Acrylonitrile and polyethylene terephthalate are mixed to obtain a mixed resin matrix, and the mass ratio of acrylonitrile to polyethylene terephthalate in the mixed resin matrix is 5:3;

[0102] The mixed resin matrix is hydrophobically modified using a silane coupling agent, and after cleaning and drying, a modified mixed resin matrix is obtained, wherein the silane coupling agent used is 3-aminopropyl triethoxysilane, and the amount of silane coupling agent is 2% of the mass of the mixed resin matrix to be treated;

[0103] The thermal expansion microsphere is prepared by taking the expanded powder, wherein the expanded powder is the expanded carbon nanotube, and the preparation of the thermal expansion microsphere includes the following steps:

[0104] The isopentane is added to the thermal expansion powder and mixed uniformly to obtain the core of the thermal expansion microsphere, and the isopentane accounts for 3% of the total weight of the core of the thermal expansion microsphere,

[0105] The thermal expansion microsphere primary body is prepared by using the emulsion polymerization method, and the preparation steps are the same as those in the preparation method of the thermal expansion microsphere primary body in Example 1;

[0106] The surface of the thermal expansion microsphere primary body is subjected to low-temperature plasma surface activation treatment, which is beneficial to improve the surface structure of the shell of the thermal expansion microsphere primary body and to a certain extent, improve the heat conduction capacity of the shell;

[0107] The surface of the thermal expansion microsphere primary body after the surface activation treatment is coated with a micron thermal conductive coating, and the micron thermal conductive coating is an aluminum oxide coating, and the thermal expansion microsphere is formed after drying. By setting the micron thermal conductive coating, it is beneficial to improve the thermal conductivity and thermal efficiency of the thermal expansion microsphere;

[0108] The transformed particles are added to the modified mixed resin matrix and uniformly mixed to obtain the shell base material, wherein the transformed particles include strontium titanate and titanium dioxide, and the mass ratio of strontium titanate to titanium dioxide is 3:5;

[0109] The shell base material and the thermal expansion microsphere are added to the coaxial spinning machine together to perform melt spinning to obtain the nano self-expanding fiber, and in the nano self-expanding fiber, the ratio of the thickness of the shell base material to the diameter size of the nano self-expanding fiber is 1:4;

[0110] The nano self-expanding fiber is taken to coat, rove and spin the first hydrophobic fiber and the second hydrophobic fiber to obtain a composite yarn;

[0111] Wherein when the nano self-expanding fiber is coated on the first hydrophobic fiber and the second hydrophobic fiber, the number of winding turns of the nano self-expanding fiber on the surface of the second hydrophobic fiber and the first hydrophobic fiber is 3:1;

[0112] The nano self-expanding fiber is taken to twist to obtain a nano self-expanding yarn;

[0113] The composite yarn is taken as the first warp and weft, and the nano self-expanding yarn is taken as the second warp, and the first warp, the second warp and the weft are cross-woven to obtain a base cloth, and the cross-woven method of the first warp, the second warp and the weft is the same as that in Example 1;

[0114] Wherein during the weaving process of the base cloth, the density ratio of the first warp to the second warp is 3:1;

[0115] The top of the base cloth is subjected to napping, cutting and combing treatment to form a pile layer on the top of the base cloth, and the pile length in the pile layer is 3mm, and the pile layer is subjected to heat setting treatment, and the pile tips in the pile layer after heat setting treatment are inclined downward, thereby facilitating the rolling of water droplets.

[0116] By setting the first warp, the second warp and the weft used for weaving in an inclined manner during the weaving of the base cloth, the lines on the base cloth obtained by weaving are inclined lines, which is conducive to reducing the resistance of the lines on the fabric to water droplets, facilitating the rapid rolling of water droplets, thereby reducing the time of contact between water droplets and the surface of the fabric, and reducing the risk of water penetrating into the fabric, thereby improving the hydrophobic effect of the flannel fabric to a certain extent.

[0117] Embodiment three,

[0118] A preparation method of a super-hydrophobic self-cleaning stain-repellent flannel fabric, comprising the following steps:

[0119] Preparation of nano self-expanding fiber, first hydrophobic fiber and second hydrophobic fiber;

[0120] The preparation of the first hydrophobic fiber comprises the following steps: blending cotton fibers, polyester fibers and spandex fibers to obtain composite fibers, and the mass ratio of cotton fibers, polyester fibers and spandex fibers in the composite fibers is 5:2:2;

[0121] The composite fibers are washed with deionized water, and then dried after washing;

[0122] A first modification solution is prepared by dissolving a first hydrophobic substance in a solvent, and the first modification solution is subjected to ultrasonic mixing treatment, wherein the first hydrophobic substance is tridecafluorooctyltriethoxysilane, the solvent is ethanol, and the mass ratio of the first hydrophobic substance to the solution in the first modification solution is 1:100;

[0123] Half of the dried composite fibers are immersed in the first modification solution, and the immersion is carried out at 50℃ for 1h;

[0124] After immersion, the first modified fiber is obtained, and the first modified fiber is placed in a 100℃ oven for 10min;

[0125] The first modified fiber is washed with deionized water, and then dried after washing to obtain the first hydrophobic fiber;

[0126] The preparation of the second hydrophobic fiber comprises the following steps:

[0127] A second modification solution is prepared by dissolving a second hydrophobic substance in a solvent, and the second modification solution is subjected to ultrasonic mixing treatment, wherein the second hydrophobic substance is methyl triethoxysilane, the solvent is isopropyl alcohol, and the mass ratio of the second hydrophobic substance to the solution in the second modification solution is 2:100;

[0128] The other half of the washed and dried composite fibers is immersed in the second modification solution, and the immersion is performed at 35°C for 0.6h;

[0129] After the immersion, the second modified fibers are taken out and placed in an oven at 80°C for 10min;

[0130] The second modified fibers are washed with deionized water, and after washing, they are dried to obtain second hydrophobic fibers;

[0131] The preparation of the nano self-expanding fibers includes the following steps:

[0132] Acrylonitrile and polyethylene terephthalate are mixed to obtain a mixed resin matrix, and the mass ratio of acrylonitrile to polyethylene terephthalate in the mixed resin matrix is 5:3;

[0133] The mixed resin matrix is subjected to hydrophobic modification treatment using a silane coupling agent, and after washing and drying, a modified mixed resin matrix is obtained, wherein the silane coupling agent used is 3-aminopropyl triethoxysilane methyl triethoxysilane, and the amount of the silane coupling agent is 2% of the mass of the mixed resin matrix to be treated;

[0134] The expanded powder is expanded carbon nanotube, and the preparation of the expanded microspheres includes the following steps:

[0135] Isopentane is added to the heat-expanded powder and mixed uniformly to obtain a heat-expanded microsphere core, and the amount of isopentane in the heat-expanded microsphere core is 3% of the total weight of the heat-expanded microsphere core,

[0136] The heat-expanded microsphere primary body is prepared by emulsion polymerization, and the preparation steps are the same as those in Example 1.

[0137] The surface of the heat-expanded microsphere primary body is subjected to low-temperature plasma surface activation treatment, which is beneficial to improving the surface structure of the heat-expanded microsphere primary body and to a certain extent, improving the heat conduction capacity of the shell layer;

[0138] The surface of the heat-expanded microsphere primary body after surface activation treatment is coated with a micron heat-conducting coating, and the micron heat-conducting coating is an aluminum oxide coating, and after drying, a heat-expanded microsphere is formed. By setting the micron heat-conducting coating, it is beneficial to improve the heat conduction capacity and efficiency of the heat-expanded microsphere;

[0139] Take the conversion particles to join to the modified mixed resin matrix, and mix evenly, get the shell layer base material, wherein the conversion particle includes strontium titanate and titanium dioxide, and the mass ratio of strontium titanate and titanium dioxide is 3:5;

[0140] The shell layer base material is added to the coaxial type spinning machine with the thermal expansion microspheres, and the melt spinning is carried out to obtain the nano self-expanding fiber, and in the nano self-expanding fiber, the ratio of the thickness of the shell layer base material to the diameter size of the nano self-expanding fiber is 1:4;

[0141] Take the nano self-expanding fiber to coat, roving and spinning process to the first hydrophobic fiber and the second hydrophobic fiber, get the composite yarn;

[0142] Wherein the number of winding turns of the nano self-expanding fiber on the surface of the second hydrophobic fiber and the first hydrophobic fiber is 3:1 when the nano self-expanding fiber is coated on the first hydrophobic fiber and the second hydrophobic fiber;

[0143] By arranging the first hydrophobic fiber and the second hydrophobic fiber side by side, and using the nano self-expanding fiber to coat and wind the first hydrophobic fiber and the second hydrophobic fiber arranged side by side, a yarn with different hydrophobicity is formed, so that the flannel fabric woven with the yarn has the characteristic of adjustable hydrophobicity, and the self-cleaning ability of the flannel fabric can be realized.

[0144] Take the nano self-expanding fiber to twist to obtain the nano self-expanding yarn;

[0145] Take the composite yarn as the first warp and weft respectively, and the nano self-expanding yarn as the second warp, and use the first warp, the second warp and the weft to cross weave to obtain the base cloth;

[0146] Wherein, the density ratio of the first warp and the second warp is 3:1 during the weaving process of the base cloth;

[0147] The top of the base cloth is subjected to raising, cutting and combing treatment to form a pile layer on the top of the base cloth, and the pile length in the pile layer is 3mm, and the pile layer is subjected to heat setting treatment, and the pile tips in the pile layer after heat setting treatment are inclined downward, thereby facilitating the rolling of water droplets.

[0148] Example four,

[0149] A preparation method of a super-hydrophobic self-cleaning and stain-repellent flannel fabric, comprising the following steps:

[0150] Preparation of nano self-expanding fiber, first hydrophobic fiber, second hydrophobic fiber;

[0151] The preparation of the first hydrophobic fiber comprises the following steps: blending cotton fibers, polyester fibers and spandex fibers to obtain composite fibers, and the mass ratio of the cotton fibers, the polyester fibers and the spandex fibers in the composite fibers is 5:2:2;

[0152] The composite fibers are cleaned with deionized water, and then taken out and dried;

[0153] The first modification solution is prepared by dissolving the first hydrophobic substance in a solvent, and the first modification solution is ultrasonically mixed, wherein the first hydrophobic substance is a mixture of octadecyl trimethoxysilane and octadecyl triethoxysilane, the mass ratio of octadecyl trimethoxysilane to octadecyl triethoxysilane is 1:1, the solvent is isopropyl ketone, and the mass ratio of the first hydrophobic substance to the solution in the first modification solution is 1:100;

[0154] Half of the dried composite fibers are immersed in the first modification solution, and the immersion is carried out at 50℃ for 1h;

[0155] The first modified fiber is obtained after immersion, and the first modified fiber is baked at 100℃ for 10min;

[0156] The first modified fiber is washed with deionized water, and then taken out and dried to obtain the first hydrophobic fiber;

[0157] The preparation of the second hydrophobic fiber comprises the following steps:

[0158] The second modification solution is prepared by dissolving the second hydrophobic substance in a solvent, and the second modification solution is ultrasonically mixed, wherein the second hydrophobic substance is dodecyl trimethoxysilane, the solvent is isopropyl ketone, and the mass ratio of the second hydrophobic substance to the solution in the second modification solution is 2:100;

[0159] The other half of the dried composite fibers are immersed in the second modification solution, and the immersion is carried out at 35℃ for 0.6h;

[0160] The second modified fiber is obtained after immersion, and the second modified fiber is baked at 80℃ for 10min;

[0161] The second modified fiber is washed with deionized water, and then taken out and dried to obtain the second hydrophobic fiber;

[0162] The preparation of the nano self-expanding fiber comprises the following steps:

[0163] The acrylonitrile and polyethylene terephthalate are mixed to obtain a mixed resin matrix, and the mass ratio of the acrylonitrile to the polyethylene terephthalate in the mixed resin matrix is 5:3;

[0164] The mixed resin matrix is subjected to hydrophobic modification treatment using a silane coupling agent, and the modified mixed resin matrix is obtained after cleaning and drying, wherein the silane coupling agent used is 3-aminopropyl triethoxysilane, and the amount of silane coupling agent is 2% of the mass of the mixed resin matrix to be treated;

[0165] The thermal expansion microspheres are prepared by taking the expanded powder, wherein the expanded powder is expanded carbon nanotubes, and the preparation of the expanded microspheres comprises the following steps:

[0166] Isopentane is added to the thermal expansion powder and mixed uniformly to obtain the core body of the thermal expansion microspheres, and the isopentane accounts for 3% of the total weight of the core body of the thermal expansion microspheres,

[0167] The thermal expansion microsphere primary body is prepared by using an emulsion polymerization method, and the preparation steps are the same as those in Example One.

[0168] The surface of the thermal expansion microsphere primary body is subjected to low-temperature plasma surface activation treatment, which is beneficial to improve the surface structure of the shell of the thermal expansion microsphere primary body and to a certain extent, improve the heat conduction capacity of the shell.

[0169] The surface of the thermal expansion microsphere primary body after surface activation treatment is coated with a micron thermal conductive coating, and the micron thermal conductive coating is an aluminum oxide coating, and the thermal expansion microspheres are formed after drying. By setting the micron thermal conductive coating, it is beneficial to improve the thermal conductivity and efficiency of the thermal expansion microspheres.

[0170] The conversion particles are added to the modified mixed resin matrix and uniformly mixed to obtain the shell base material, wherein the conversion particles include strontium titanate and titanium dioxide, and the mass ratio of strontium titanate to titanium dioxide is 3:5.

[0171] The shell base material and the thermal expansion microspheres are added to the same coaxial spinning machine to perform melt spinning to obtain the nano self-expanding fiber, and in the nano self-expanding fiber, the ratio of the thickness of the shell base material to the diameter size of the nano self-expanding fiber is 1:4.

[0172] The first hydrophobic fiber and the second hydrophobic fiber are coated, roved and spun with the nano self-expanding fiber to obtain a composite yarn.

[0173] The number of winding turns of the nano self-expanding fiber on the surface of the second hydrophobic fiber and the first hydrophobic fiber is 5:1 when the nano self-expanding fiber is coated on the first hydrophobic fiber and the second hydrophobic fiber.

[0174] The nano self-expanding fiber is twisted to obtain a nano self-expanding yarn.

[0175] The composite yarn is used as the first warp and weft, and the nano self-expanding yarn is used as the second warp, and the first warp, the second warp and the weft are cross-woven to obtain a base cloth.

[0176] wherein the density ratio of the first warp threads to the second warp threads is 5:1 during weaving of the base cloth;

[0177] the top of the base cloth is subjected to napping, shearing and carding to form a pile layer on the top of the base cloth, the pile length in the pile layer is 3mm, and the pile layer is subjected to heat setting treatment, and the pile tips in the pile layer after the heat setting treatment are inclined downward, thereby facilitating the rolling off of water drops.

[0178] Example Five,

[0179] A preparation method of a super-hydrophobic self-cleaning stain-repellent flannel fabric, comprising the following steps:

[0180] Preparation of nano self-expanding fibers, first hydrophobic fibers and second hydrophobic fibers;

[0181] Preparation of the first hydrophobic fibers comprises the following steps: cotton fibers, polyester fibers and spandex fibers are blended to obtain composite fibers, and the mass ratio of the cotton fibers, polyester fibers and spandex fibers in the composite fibers is 5:2:2;

[0182] The composite fibers are washed with deionized water, and then taken out and dried after washing;

[0183] The first modification solution is prepared by dissolving the first hydrophobic substance in a solvent, and the first modification solution is subjected to ultrasonic mixing treatment, wherein the first hydrophobic substance is a mixture of octadecyl trimethoxysilane and octadecyl triethoxysilane, the mass ratio of octadecyl trimethoxysilane to octadecyl triethoxysilane is 1:1, the solvent is isopropyl acetone, and the mass ratio of the first hydrophobic substance to the solution in the first modification solution is 1:100;

[0184] Half of the washed and dried composite fibers are immersed in the first modification solution, and the immersion is carried out at 50℃ for 1h;

[0185] The first modified fibers are obtained after the immersion, and the first modified fibers are baked at 100℃ for 10min;

[0186] The first modified fibers are washed with deionized water, and then taken out and dried after washing to obtain the first hydrophobic fibers;

[0187] Preparation of the second hydrophobic fibers comprises the following steps:

[0188] The second modification solution is prepared by dissolving the second hydrophobic substance in a solvent, and the second modification solution is subjected to ultrasonic mixing treatment, wherein the second hydrophobic substance is dodecyl trimethoxysilane, the solvent is isopropyl acetone, and the mass ratio of the second hydrophobic substance to the solution in the second modification solution is 2:100;

[0189] The other half of the washed and dried composite fiber is immersed in a second modification solution, and the immersion is performed at 35℃ for 0.6h;

[0190] After the immersion, the second modified fiber is taken out and baked at 80℃ for 10min;

[0191] The second modified fiber is washed with deionized water, and after washing, it is dried to obtain a second hydrophobic fiber;

[0192] The preparation of the nano self-expanding fiber includes the following steps:

[0193] The acrylonitrile and polyethylene terephthalate are mixed to obtain a mixed resin matrix, and the mass ratio of acrylonitrile to polyethylene terephthalate in the mixed resin matrix is 5:3;

[0194] The mixed resin matrix is hydrophobically modified using a silane coupling agent, and after washing and drying, a modified mixed resin matrix is obtained, wherein the silane coupling agent used is 3-aminopropyl triethoxysilane, and the amount of silane coupling agent is 2% of the mass of the mixed resin matrix to be treated;

[0195] The expanded powder is used to prepare the heat-expandable microspheres, wherein the expanded powder is expanded carbon nanotubes, and the preparation of the expanded microspheres includes the following steps:

[0196] Isopentane is added to the heat-expandable powder and mixed uniformly to obtain a heat-expandable microsphere core, and the amount of isopentane is 3% of the total weight of the heat-expandable microsphere core,

[0197] The heat-expandable microsphere primary body is prepared by emulsion polymerization, and the preparation steps are the same as those in Example 1.

[0198] The surface of the heat-expandable microsphere primary body is subjected to low-temperature plasma surface activation treatment, which is beneficial to improve the surface structure of the heat-expandable microsphere primary body and to a certain extent, improve the heat conduction capacity of the shell layer;

[0199] The surface of the heat-expandable microsphere primary body after surface activation treatment is coated with a micron heat-conducting coating, and the micron heat-conducting coating is an aluminum oxide coating, and after drying, a heat-expandable microsphere is formed. By setting the micron heat-conducting coating, it is beneficial to improve the heat conduction capacity and efficiency of the heat-expandable microsphere;

[0200] The conversion particles are added to the modified mixed resin matrix and uniformly mixed to obtain a shell base material, wherein the conversion particles include strontium titanate and titanium dioxide, and the mass ratio of strontium titanate to titanium dioxide is 3:5;

[0201] The shell layer base material and the thermal expansion microspheres are added into a coaxial type spinning machine, melt spinning is carried out, and the nanometer self-expanding fiber is obtained, and the ratio of the thickness of the shell layer base material to the diameter size of the nanometer self-expanding fiber is 1:2;

[0202] The nanometer self-expanding fiber is used to coat, roving and spinning processes of the first hydrophobic fiber and the second hydrophobic fiber, and the composite yarn is obtained;

[0203] The ratio of the number of winding turns of the nanometer self-expanding fiber on the surface of the second hydrophobic fiber to the first hydrophobic fiber is 5:1 when the nanometer self-expanding fiber is used to coat the first hydrophobic fiber and the second hydrophobic fiber;

[0204] The nanometer self-expanding fiber is twisted to obtain the nanometer self-expanding yarn;

[0205] The composite yarn is used as the first warp and weft, and the nanometer self-expanding yarn is used as the second warp, and the first warp, the second warp and the weft are crossed to weave the base cloth;

[0206] The density ratio of the first warp to the second warp is 3:1 during the weaving process of the base cloth;

[0207] The top of the base cloth is subjected to napping, cutting and combing treatment to form a pile layer on the top of the base cloth, and the pile length in the pile layer is 3mm, and the pile layer is subjected to heat setting treatment, and the pile tips in the pile layer after heat setting treatment are inclined downward, thereby facilitating the rolling of water droplets.

[0208] Comparative Example One,

[0209] A preparation method of a flannel fabric, comprising the following steps:

[0210] Cotton fibers, polyester fibers and spandex fibers are blended to obtain composite fibers, and the mass ratio of the cotton fibers, the polyester fibers and the spandex fibers in the composite fibers is 5:2:2;

[0211] The composite fibers are washed with deionized water, and then dried after washing;

[0212] Dodecyltrimethoxysilane is dissolved in isopropyl acetone to prepare a composite fiber modification solution, and the mass ratio of dodecyltrimethoxysilane to the solution in the composite fiber modification solution is 2:100

[0213] The modified composite fibers are used as warp and weft to weave the base cloth by cross-weaving;

[0214] The top of the base cloth is subjected to raising, cutting and carding treatment to form a pile layer on the top of the base cloth, and the pile length in the pile layer is 3 mm, and a heat setting treatment is performed on the pile layer, and the pile tips in the pile layer after the heat setting treatment are inclined downward, thereby facilitating the rolling off of water droplets.

[0215] The flannel fabric sample is obtained from the flannel fabric prepared in Example One to Comparative Example One, and the size of the flannel fabric sample is 200 mm*350 mm;

[0216] The water droplet and fabric surface contact angle of the flannel fabric sample is determined according to GB / T30693-2014 "Determination of the Surface Contact Angle of Textiles", specifically, a static water contact angle test is performed using a static drop method contact angle measuring instrument, the water amount is 5 μL each time, the reading is taken after the water droplet contacts the fabric for 30 s, the measurement is performed 5 times at different positions of the same sample, and the average value is taken;

[0217] The water droplet rolling angle test of the flannel fabric sample is performed, specifically, the flannel fabric sample is fixed on an angle-adjustable platform, and the same amount of water droplets is added at the same position of the fabric sample, the inclination angle is slowly adjusted, and the platform inclination angle when the water droplet starts to roll is recorded;

[0218] The clean stain removal ability test of the flannel fabric sample is performed, specifically, the same amount and area of stains are uniformly applied on the surface of the flannel sample, then the weight of the flannel sample after applying the stains is measured, the flannel sample is washed under the same conditions using water flow with the same flow rate, then the fabric sample is dried and weighed again, the difference between the two fabric sample weights is calculated, and the stain removal rate is calculated by the difference between the two fabric sample weights / the total amount of stain application*100%;

[0219] The test results are shown in the following table:

[0220] According to the test results, the flannel fabric prepared by the flannel fabric preparation method proposed in the present application has a higher contact angle than the flannel fabric prepared in Comparative Example One, thereby making the flannel fabric have super-hydrophobic properties. According to the test results of Example One and Example Three, the contact angle of the flannel fabric is improved by modifying the composite fibers using long-chain alkyl silane, thereby improving the hydrophobicity of the flannel fabric. According to the test results of Example One, Example Four and Example Five, by setting appropriate nano self-expanding fiber winding ratios on the outer sides of the first and second hydrophobic yarns, and by setting appropriate fiber outer layer thicknesses and heat-expandable microsphere filling amounts for the self-expanding fibers, the hydrophobic properties of the flannel fabric are improved, and the self-cleaning and stain-repellent properties of the flannel fabric are greatly improved.

[0221] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric, characterized in that: Includes the following steps: Prepare nano-self-expanding fibers, a first hydrophobic fiber, and a second hydrophobic fiber; The composite yarn is obtained by coating the first and second hydrophobic fibers with nano-self-expanding fibers, followed by roving and spinning processes. Nano self-expanding fibers are twisted to obtain nano self-expanding yarn; Composite yarns are used as the first warp and weft, and nano self-expanding yarn is used as the second warp. The first warp, second warp and weft are interwoven to obtain the base fabric. The top of the base fabric is treated with napping, shearing, and combing to form a pile layer on top of the base fabric; The preparation of the first hydrophobic fiber includes the following steps: Cotton fiber, polyester fiber and spandex fiber are blended to obtain composite fiber, and the mass ratio of cotton fiber, polyester fiber and spandex fiber in the composite fiber is (3~8):(2~5):(2~4); The composite fibers are cleaned with deionized water, and then removed and dried. A first modified solution is prepared by dissolving a first hydrophobic substance in a solvent and then ultrasonically mixing the first modified solution. The first hydrophobic substance includes at least one of octadecyltrimethoxysilane, octadecyltriethoxysilane, and tridecafluorooctyltriethoxysilane. The solvent includes one of isoacetone and ethanol. The mass ratio of the first hydrophobic substance to the solution in the first modified solution is (1-3):

100. Half of the cleaned and dried composite fiber was immersed in the first modification solution and soaked for 1 to 1.5 hours at 24 to 55°C. After impregnation, the first modified fiber is obtained and then baked at 85-110℃ for 10-15 minutes. The first modified fiber was washed with deionized water, and then dried to obtain the first hydrophobic fiber. The preparation of the second hydrophobic fiber includes the following steps: The second hydrophobic substance is dissolved in a solvent to prepare a second modified solution, and the second modified solution is subjected to ultrasonic mixing treatment. The second hydrophobic substance includes at least one of dodecyltrimethoxysilane and methyltriethoxysilane, and the solvent includes one of isoacetone and ethanol. The mass ratio of the second hydrophobic substance to the solution in the second modified solution is (1-3):

100. The other half of the cleaned and dried composite fiber is immersed in the second modification solution and impregnated at 24-40°C for 0.5-1 hour. After impregnation, the second modified fiber is obtained and then baked at 65-85℃ for 10-15 minutes. The second modified fiber was washed with deionized water, and then dried to obtain the second hydrophobic fiber.

2. The method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric according to claim 1, characterized in that: The mass ratio of the first hydrophobic fiber to the second hydrophobic fiber in the composite yarn is 1:

1.

3. The method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric according to claim 2, characterized in that: When the nano-self-expanding fibers are used to coat the first hydrophobic fiber and the second hydrophobic fiber, the ratio of the number of turns of the nano-self-expanding fibers on the surface of the second hydrophobic fiber and the first hydrophobic fiber is (3~5):

1.

4. The method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric according to claim 1, characterized in that: During the weaving process of the base fabric, the density ratio of the first warp and the second warp is (2-5):

1.

5. The method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric according to claim 1, characterized in that: The preparation of the self-expanding nanofibers includes the following steps: Acrylonitrile and polyethylene terephthalate are mixed to obtain a mixed resin matrix; The mixed resin matrix was hydrophobically modified using a silane coupling agent, and the modified mixed resin matrix was obtained after cleaning and drying. Thermally expandable microspheres are prepared from expanded powder, wherein the expanded powder includes at least one of expanded graphite or expanded carbon nanotubes; The converted particles are added to the modified mixed resin matrix and mixed evenly to obtain the shell substrate, wherein the converted particles include at least one of strontium titanate, titanium dioxide, and titanium trioxide; The shell substrate and thermally expanded microspheres are added together into a coaxial spinning machine for melt spinning to obtain nano self-expanding fibers. The ratio of the thickness of the shell substrate to the diameter of the nano self-expanding fibers is 1:(1~4).

6. The method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric according to claim 5, characterized in that: The thermally expanding microspheres in the self-expanding nanofibers further include the following steps: Isopentane was added to the thermally expandable powder and mixed evenly to obtain the core of the thermally expandable microspheres; Low-temperature plasma surface activation treatment was performed on the surface of thermally expandable microspheres; A micron-sized thermally conductive coating is applied to the surface of the thermal microspheres after surface activation treatment.

7. The method for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric according to claim 6, characterized in that: The micron-sized thermally conductive coating includes an aluminum oxide micron-sized coating or a copper oxide micron-sized coating.

8. A superhydrophobic, self-cleaning, stain-repellent flannel fabric, characterized in that: The fabric is prepared using the method described in claim 1 for preparing a superhydrophobic, self-cleaning, stain-repellent flannel fabric.

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