A superhydrophobic silk / ultrafine viscose high-softness fabric

Abstract

This invention provides a method for preparing a superhydrophobic silk / ultrafine viscose high-softness fabric, comprising the following steps: S1. Degumming the silk / ultrafine viscose fabric to obtain a degummed silk / ultrafine viscose fabric; S2. Adding hydrophobic micron-sized flake-like aerogel powder to ethyl acetate solvent and stirring to mix evenly to obtain a hydrophobic finishing solution; S3. Applying the hydrophobic finishing solution prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, and then drying the fabric, repeating the application in the same direction as the first application to obtain a silk / ultrafine viscose fabric with a surface covered with flake-like powder; S4. Adding PDMS and hydrophobic nano-TiO2 nanoparticles to a spinnable tetraethyl orthosilicate solution, mixing and stirring evenly, and aging to a spinnable viscosity, using the side of the fabric surface covered with flake-like powder as the receiving surface, and performing electrospinning to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

Description

Technical Field

[0001] This invention relates to the field of functional fabrics, specifically to a superhydrophobic silk / ultrafine viscose high-softness fabric. Background Technology

[0002] China is the world's largest producer and exporter of textiles, and its silk protein fiber production ranks first globally. Jiangsu Province is a major producer of silk protein fiber products, and Suzhou has historically been known as the "Silk Capital." However, with historical changes and the continuous expansion of Suzhou's industrial economy and the rapid development of emerging industries, the silk industry, once a traditional strength of Suzhou, has gradually shrunk. In recent years, the main silk industry in Jiangsu Province has shifted to the coastal areas of northern Jiangsu, and Suzhou's silk industry has reached a critical stage of transformation and development. The current state of Suzhou's silk industry is actually a microcosm of the development of China's silk industry, which has faced developmental difficulties for many years. The sustainable development experience of some textile manufacturers shows that the development of other industries and the textile industry are not always contradictory. Developing blended or interwoven products of viscose and silk protein fibers, and using modern dyeing and finishing technologies to develop novel and value-added silk protein fiber products, thereby promoting the transformation and upgrading of the textile industry, is the correct direction for revitalizing the textile sector.

[0003] Over the past decade, with the advancement of spinning technology and scientific advancements, a large number of new regenerated and synthetic fibers have entered the market and successfully gained consumer favor. These new regenerated and synthetic fibers have been widely applied in the development of new products in the cotton, wool, and knitting industries, and have achieved large-scale industrial application. However, their application in combination with silk protein fibers is relatively limited. The unique skin-friendly and comfortable properties of silk protein can endow blended fabrics with special luster and performance. Fabrics made by blending silk fibers with ultrafine viscose can be soft, but because both silk and viscose are hydrophilic fibers, the fabrics lack sufficient water resistance. Therefore, it is necessary to conduct research on the technological pathways for developing new products using viscose and silk protein. Summary of the Invention

[0004] Technical problem to be solved: The purpose of this invention is to provide a superhydrophobic silk / superfine viscose high-softness fabric, which uses viscose and silk protein fibers interwoven to develop new modified viscose products, improve the product's feel and style characteristics, and solve some performance defects inherent in single fiber varieties.

[0005] Technical solution: A superhydrophobic silk / microfiber viscose high-softness fabric, wherein the superhydrophobic silk / microfiber viscose high-softness fabric includes a fabric layer, a scale-like layer and an electrospinning layer.

[0006] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0007] S1. Add the silk / microfiber viscose fabric to a papain solution for degumming treatment to obtain the degummed silk / microfiber viscose fabric.

[0008] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution;

[0009] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, then dry the fabric. Then repeat the application of the hydrophobic finishing liquid prepared in step S2 in the same direction as the first application, and continue drying to obtain a silk / ultrafine viscose fabric with a surface covered with similar scale-like powder.

[0010] S4. Add PDMS and hydrophobic nano-TiO2 nanoparticles to a spinnable tetraethyl orthosilicate solution, mix and stir evenly, and age to a spinnable viscosity. Use the side of the fabric surface covered with similar scale-like powder as the receiving surface, and perform electrospinning to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0011] Preferably, the concentration of the hydrophobic finishing solution in step S2 is 4-6.5 wt%.

[0012] Preferably, in step S1, the degumming process of the silk / microfiber viscose fabric is as follows: the bath ratio is 1:30-50, the degumming temperature is 50-60℃, the time is 60-100min, and the concentration of the papain solution is 1-2g / L.

[0013] Preferably, the method for preparing the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0014] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 1.5-3.2 wt%;

[0015] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution, stir until homogeneous, and obtain a silane coupling agent solution with a concentration of 0.5-1 wt%.

[0016] S13. Add the cellulose solution to the silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, let stand and aspirate the supernatant to obtain the silanized cellulose solution.

[0017] S14. The silanized cellulose solution is subjected to unidirectional freeze-drying. After unidirectional freeze-drying, the freeze-dried cellulose is pulverized and sieved to obtain 120-250 mesh flake powder, yielding micron-sized flake cellulose aerogel powder. Preferably, in step S4, the molar ratio of tetraethyl orthosilicate:ethanol:water in the spinnable tetraethyl orthosilicate solution is 1:2:2, and the pH of the tetraethyl orthosilicate solution is 2-3.

[0018] Preferably, in step S4, the mass fraction of PDMS in the tetraethyl orthosilicate solution is 3.5-6.5 wt%.

[0019] Preferably, in step S4, the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.2-1.8 wt%.

[0020] Preferably, the spun viscosity in step S4 is 200-280 mPa·s.

[0021] Beneficial effects: The superhydrophobic silk / ultrafine viscose high-softness fabric of this invention has the following advantages:

[0022] 1. The superhydrophobic silk / microfiber viscose high-softness fabric of this invention is made by blending and weaving silk fibers and microfiber viscose to create a soft fabric. However, since both silk and viscose are hydrophilic fibers, the fabric is not waterproof enough. In this invention, a multi-layered composite structure on the surface of butterfly wings is used as a hydrophobic layer. First, the dense scale structure on the surface of the fabric is simulated on the surface of butterfly wings. Then, a network structure with longitudinal and transverse connections is formed by electrospinning, similar to the secondary structure on the surface of butterfly wings. In order to achieve the tertiary structure on the surface of butterfly wings, a certain amount of nanoparticles are added to the electrospinning solution to form nanoscale protrusions on the surface of the electrospinning film, thereby forming a multi-level composite structure on the surface of butterfly wings and improving the hydrophobicity of the fabric.

[0023] 2. In this invention, the scale layer can be applied in a unidirectional manner, which allows more hydrophobic micron-sized flake-like gel powder to adhere to the surface of the fabric, forming a scale layer on the surface of the fabric. Applying it in the same direction multiple times can allow more scale layers to adhere to the fabric surface, thus improving the waterproof effect.

[0024] 3. The fabric prepared by this invention has a soft-touch feel on the inner side and a super waterproof effect on the outer side, providing a dual style effect. Detailed Implementation

[0025] The present invention will be further described below with reference to embodiments. These embodiments are illustrative of the present invention, but the present invention is not limited to these embodiments:

[0026] Example 1

[0027] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer, a scale-like layer and an electrospinning layer;

[0028] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0029] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 2 g / L for degumming treatment. The degumming process was as follows: bath ratio of 1:50, degumming temperature of 50℃, and time of 100 min, to obtain the degummed silk / microfiber viscose fabric.

[0030] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution with a concentration of 4wt%;

[0031] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, then dry the fabric. Repeat the application of the hydrophobic finishing liquid prepared in step S2 in the same direction as the first application, and continue drying to obtain a silk / ultrafine viscose fabric with a surface covered with similar scale-like powder.

[0032] S4. Add PDMS and hydrophobic nano-TiO2 nanoparticles to a spinnable tetraethyl orthosilicate solution at pH 2. The mass fraction of PDMS in the tetraethyl orthosilicate solution is 6.5 wt%, and the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.2 wt%. Mix and stir evenly and age until the viscosity is spinnable, which is 200 mPa·s. Electrospinning is performed with the side of the fabric surface covered with similar scaly powder as the receiving surface to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0033] The preparation method of the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0034] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 1.5 wt%;

[0035] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution and stir until homogeneous to obtain a silane coupling agent solution with a concentration of 1 wt%. S13. Add cellulose solution to silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, and allow to stand to remove the supernatant to obtain silanized cellulose solution.

[0036] S14. The silanized cellulose solution is subjected to one-way freezing treatment. After one-way freezing treatment, it is freeze-dried. The freeze-dried cellulose is pulverized and sieved to obtain 120-mesh flake powder, thus obtaining micron-sized flake cellulose aerogel powder.

[0037] Example 2

[0038] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer, a scale-like layer and an electrospinning layer;

[0039] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0040] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 1 g / L for degumming treatment. The degumming process was as follows: bath ratio of 1:30, degumming temperature of 60℃, and time of 60 min, to obtain the degummed silk / microfiber viscose fabric.

[0041] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution with a concentration of 6.5 wt%.

[0042] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, then dry the fabric. Then repeat the application of the hydrophobic finishing liquid prepared in step S2 twice, with the application direction being the same as the first application direction. Continue drying to obtain a silk / ultrafine viscose fabric with a surface covered with similar scale-like powder.

[0043] S4. PDMS and hydrophobic nano-TiO2 nanoparticles are added to a spinnable tetraethyl orthosilicate solution at pH 3. The mass fraction of PDMS in the tetraethyl orthosilicate solution is 3.5 wt%, and the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.8 wt%. The mixture is stirred evenly and aged until a spinnable viscosity of 280 mPa·s is reached. Electrospinning is performed on the side of the fabric surface covered with a scaly powder as the receiving surface to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0044] The preparation method of the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0045] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 3.2 wt%;

[0046] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution and stir until homogeneous to obtain a 0.5wt% silane coupling agent solution. S13. Add cellulose solution to silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, and allow to stand to remove the supernatant to obtain silanized cellulose solution.

[0047] S14. The silanized cellulose solution is subjected to one-way freezing treatment. After one-way freezing treatment, it is freeze-dried. The freeze-dried cellulose is pulverized and sieved to obtain 250-mesh flake powder, thus obtaining micron-sized flake cellulose aerogel powder.

[0048] Example 3

[0049] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer, a scale-like layer and an electrospinning layer;

[0050] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0051] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 1.2 g / L for degumming. The degumming process was as follows: bath ratio of 1:45, degumming temperature of 50℃, and time of 70 min, to obtain the degummed silk / microfiber viscose fabric.

[0052] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution with a concentration of 4.5 wt%.

[0053] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, then dry the fabric. Repeat the application of the hydrophobic finishing liquid prepared in step S2 in the same direction as the first application, and continue drying to obtain a silk / ultrafine viscose fabric with a surface covered with similar scale-like powder.

[0054] S4. PDMS and hydrophobic TiO2 nanoparticles are added to a spinnable tetraethyl orthosilicate solution at pH 3. The mass fraction of PDMS in the tetraethyl orthosilicate solution is 4.5 wt%, and the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.4 wt%. The mixture is stirred evenly and aged until a spinnable viscosity of 260 mPa·s is reached. Electrospinning is performed on the side of the fabric surface covered with a scaly powder as the receiving surface to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0055] The preparation method of the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0056] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 2.5 wt%;

[0057] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution and stir until homogeneous to obtain a silane coupling agent solution with a concentration of 0.8 wt%. S13. Add cellulose solution to silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, and allow to stand to remove the supernatant to obtain silanized cellulose solution.

[0058] S14. The silanized cellulose solution is subjected to one-way freezing treatment. After one-way freezing treatment, it is freeze-dried. The freeze-dried cellulose is pulverized and sieved to obtain 150-mesh flake powder, thus obtaining micron-sized flake cellulose aerogel powder.

[0059] Example 4

[0060] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer, a scale-like layer and an electrospinning layer;

[0061] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0062] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 1.8 g / L for degumming. The degumming process was as follows: bath ratio of 1:35, degumming temperature of 60℃, and time of 90 min, to obtain the degummed silk / microfiber viscose fabric.

[0063] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution with a concentration of 5.5 wt%.

[0064] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, then dry the fabric. Then repeat the application of the hydrophobic finishing liquid prepared in step S2 twice, with the application direction being the same as the first application direction. Continue drying to obtain a silk / ultrafine viscose fabric with a surface covered with similar scale-like powder.

[0065] S4. PDMS and hydrophobic nano-TiO2 nanoparticles are added to a spinnable tetraethyl orthosilicate solution at pH 3. The mass fraction of PDMS in the tetraethyl orthosilicate solution is 6 wt%, and the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.6 wt%. The mixture is stirred evenly and aged until the viscosity is spinnable, which is 220 mPa·s. Electrospinning is performed on the side of the fabric surface covered with similar scaly powder as the receiving surface to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0066] The preparation method of the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0067] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 1.9 wt%;

[0068] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution and stir until homogeneous to obtain a 0.6 wt% silane coupling agent solution. S13. Add cellulose solution to silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, and allow to stand to remove the supernatant to obtain silanized cellulose solution.

[0069] S14. The silanized cellulose solution is subjected to one-way freezing treatment. After one-way freezing treatment, it is freeze-dried. The freeze-dried cellulose is pulverized and sieved to obtain 200-mesh flake powder, thus obtaining micron-sized flake cellulose aerogel powder.

[0070] Example 5

[0071] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer, a scale-like layer and an electrospinning layer;

[0072] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0073] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 1.5 g / L for degumming. The degumming process was as follows: bath ratio of 1:40, degumming temperature of 55℃, and time of 80 min, to obtain the degummed silk / microfiber viscose fabric.

[0074] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution with a concentration of 5wt%;

[0075] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, then dry the fabric. Then repeat the application of the hydrophobic finishing liquid prepared in step S2 twice, with the application direction being the same as the first application direction. Continue drying to obtain a silk / ultrafine viscose fabric with a surface covered with similar scale-like powder.

[0076] S4. Add PDMS and hydrophobic nano-TiO2 nanoparticles to a spinnable tetraethyl orthosilicate solution at pH 3. The mass fraction of PDMS in the tetraethyl orthosilicate solution is 5.5 wt%, and the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.5 wt%. Mix and stir evenly and age until the viscosity is spinnable, which is 240 mPa·s. Electrospinning is performed with the side of the fabric surface covered with similar scaly powder as the receiving surface to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0077] The preparation method of the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0078] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 2.2 wt%;

[0079] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution and stir until homogeneous to obtain a 0.7wt% silane coupling agent solution. S13. Add cellulose solution to silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, and allow to stand to remove the supernatant to obtain silanized cellulose solution.

[0080] S14. The silanized cellulose solution is subjected to one-way freezing treatment. After one-way freezing treatment, it is freeze-dried. The freeze-dried cellulose is pulverized and sieved to obtain 180-mesh flake powder, thus obtaining micron-sized flake cellulose aerogel powder.

[0081] Comparative Example 1

[0082] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer and a scale-like layer;

[0083] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0084] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 1.8 g / L for degumming. The degumming process was as follows: bath ratio of 1:35, degumming temperature of 60℃, and time of 90 min, to obtain the degummed silk / microfiber viscose fabric.

[0085] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution with a concentration of 5.5 wt%.

[0086] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, then dry the fabric. Then repeat the application of the hydrophobic finishing liquid prepared in step S2 twice, with the application direction being the same as the first application direction. Continue drying to obtain a superhydrophobic silk / superfine viscose high softness fabric.

[0087] The preparation method of the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0088] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 1.9 wt%;

[0089] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution and stir until homogeneous to obtain a 0.6 wt% silane coupling agent solution. S13. Add cellulose solution to silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, and allow to stand to remove the supernatant to obtain silanized cellulose solution.

[0090] S14. The silanized cellulose solution is subjected to one-way freezing treatment. After one-way freezing treatment, it is freeze-dried. The freeze-dried cellulose is pulverized and sieved to obtain 200-mesh flake powder, thus obtaining micron-sized flake cellulose aerogel powder.

[0091] Comparative Example 2

[0092] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer and a coating layer;

[0093] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0094] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 1.5 g / L for degumming. The degumming process was as follows: bath ratio of 1:40, degumming temperature of 55℃, and time of 80 min, to obtain the degummed silk / microfiber viscose fabric.

[0095] S2. Add PDMS and hydrophobic TiO2 nanoparticles to a spinnable tetraethyl orthosilicate solution at pH 3. The mass fraction of PDMS in the tetraethyl orthosilicate solution is 5.5 wt%, and the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.5 wt%. Mix and stir evenly and age to a certain viscosity. The spinnable viscosity is 180 mPa·s. Apply the solution to the surface of the fabric to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0096] Comparative Example 3

[0097] A superhydrophobic silk / microfiber viscose high-softness fabric, the superhydrophobic silk / microfiber viscose high-softness fabric comprising a fabric layer, a scale-like layer and an electrospinning layer;

[0098] The preparation method of the above-mentioned superhydrophobic silk / microfiber viscose high-softness fabric includes the following steps:

[0099] S1. The silk / microfiber viscose fabric was added to a papain solution with a concentration of 1.2 g / L for degumming. The degumming process was as follows: bath ratio of 1:45, degumming temperature of 50℃, and time of 70 min, to obtain the degummed silk / microfiber viscose fabric.

[0100] S2. Add the hydrophobic micron-sized aerogel powder to ethyl acetate solvent and stir to mix evenly to obtain a hydrophobic finishing solution with a concentration of 4.5 wt%.

[0101] S3. Apply the hydrophobic finishing liquid prepared in S2 to the surface of the fabric after degumming in step S1 in one direction, and then dry the fabric to obtain a silk / ultrafine viscose fabric with a surface covered with similar scale-like powder.

[0102] S4. PDMS and hydrophobic TiO2 nanoparticles are added to a spinnable tetraethyl orthosilicate solution at pH 3. The mass fraction of PDMS in the tetraethyl orthosilicate solution is 4.5 wt%, and the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.4 wt%. The mixture is stirred evenly and aged until a spinnable viscosity of 260 mPa·s is reached. Electrospinning is performed on the side of the fabric surface covered with a scaly powder as the receiving surface to obtain a superhydrophobic silk / ultrafine viscose high-softness fabric.

[0103] The preparation method of the hydrophobic micron-sized sheet-like gel powder in step S2 is as follows:

[0104] S11. Disperse cellulose in an aqueous hydrochloric acid solution to obtain a cellulose solution with a concentration of 2.5 wt%;

[0105] S12. Dissolve methyltrimethoxysilane in hydrochloric acid aqueous solution and stir until homogeneous to obtain a silane coupling agent solution with a concentration of 0.8 wt%. S13. Add cellulose solution to silane coupling agent solution at a volume ratio of 1:1, disperse evenly by ultrasonication, and allow to stand to remove the supernatant to obtain silanized cellulose solution.

[0106] S14. The silanized cellulose solution is subjected to one-way freezing treatment. After one-way freezing treatment, it is freeze-dried. The freeze-dried cellulose is pulverized and sieved to obtain 150-mesh flake powder, thus obtaining micron-sized flake cellulose aerogel powder.

[0107] Performance testing: The above examples and comparative examples all used fabrics with silk warp yarns and ultrafine viscose weft yarns for the experiments. The hydrophobicity was characterized by measuring the contact angle of water droplets on the fabric surface using a contact angle meter, with the water droplet being 10 μL.

[0108] Contact angle / ° Example 1 156.6 Example 2 159.1 Example 3 154.3 Example 4 157.5 Example 5 159.2 Comparative Example 1 145.1 Comparative Example 2 123.6 Comparative Example 3 148.9

[0109] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A superhydrophobic silk / ultrafine viscose high-softness fabric, characterized in that: The super-hydrophobic silk / superfine viscose high-soft fabric comprises a fabric layer, a scale-like layer and an electrospun layer. The preparation method of the super-hydrophobic silk / superfine viscose high-soft fabric comprises the following steps: S1. degumming treatment of the silk / superfine viscose fabric in a papain solution to obtain degummed silk / superfine viscose fabric; S2. stirring and mixing the hydrophobic micrometer scale aerogel powder in ethyl acetate solvent to obtain a hydrophobic finishing liquid; S3. applying the hydrophobic finishing liquid prepared in step S2 on the surface of the fabric after degumming in step S1 in one direction, drying the fabric, then repeating the application of the hydrophobic finishing liquid prepared in step S2 in the same direction as the first application, and continuing to dry to obtain a silk / superfine viscose fabric with scale-like powder on the surface; S4. adding PDMS and hydrophobic nano-TiO2 nanoparticles to a spinnable tetraethyl orthosilicate solution, mixing and stirring uniformly, aging to a spinnable viscosity, taking the side of the fabric with scale-like powder as the receiving surface, and electrospinning to obtain a super-hydrophobic silk / superfine viscose high-soft fabric. In step S2, the preparation method of the hydrophobic micrometer scale aerogel powder is as follows: S11. dispersing cellulose in a hydrochloric acid aqueous solution to obtain a cellulose solution with a concentration of 1.5-3.2wt%; S12. dissolving methyltrimethoxysilane in a hydrochloric acid aqueous solution and stirring uniformly to obtain a silane coupling agent solution with a concentration of 0.5-1wt%; S13. adding the cellulose solution to the silane coupling agent solution at a volume ratio of 1:1, ultrasonic dispersion, and absorbing the supernatant to obtain a silanized cellulose solution; S14. one-way freezing treatment of the silanized cellulose solution, followed by freeze-drying, crushing the freeze-dried cellulose, and sieving out scale-like powder with a particle size of 120-250μm to obtain micrometer scale cellulose aerogel powder.

2. The superhydrophobic silk / superfine viscose high-softness fabric according to claim 1, characterized in that: In step S1, the degumming process of the silk / superfine viscose fabric is as follows: bath ratio 1:30-50, degumming temperature 50-60℃, time 60-100min, and concentration of papain solution 1-2g / L. 3.The super-hydrophobic silk / super fine viscose high-softness fabric according to claim 1, characterized in that: In step S2, the concentration of the hydrophobic finishing liquid is 4-6.5wt%.

4. The superhydrophobic silk / superfine viscose high-softness fabric according to claim 1, characterized in that: In step S4, the molar ratio of tetraethyl orthosilicate: ethanol: water in the spinnable tetraethyl orthosilicate solution is 1:2:2, and the pH of the tetraethyl orthosilicate solution is 2-3.

5. The superhydrophobic silk / superfine viscose high-softness fabric according to claim 1, characterized in that: In step S4, the mass fraction of PDMS in the tetraethyl orthosilicate solution is 3.5-6.5wt%.

6. The superhydrophobic silk / superfine viscose high-softness fabric according to claim 1, characterized in that: In step S4, the mass fraction of TiO2 nanoparticles in the tetraethyl orthosilicate solution is 1.2-1.8wt%.

7. The superhydrophobic silk / superfine viscose high-softness fabric according to claim 1, characterized in that: In step S4, the spinnable viscosity is 200-280mPa•s.