Skin-like fabric and preparation method thereof

Abstract

The invention provides a skin-like fabric, the skin-like fabric comprises a fabric layer, a hydrophobic porous layer and a hydrophilic layer, the hydrophobic porous layer contains micro-nano pores, and the hydrophilic layer is a porous gel layer. According to the skin-like fabric and the preparation method thereof provided by the invention, the fabric is endowed with directional water delivery capacity through treatment of functional components and cooperation of a fabric structure, so that the heat-wet comfort of a human body is improved.

Description

Technical Field

[0001] The invention relates to the field of functional fabrics, and in particular to a skin-like fabric and a preparation method thereof. Background Art

[0002] In recent years, the management of human thermal and moisture comfort has gradually become a research hotspot. Studies have found that by creating a gradient wetting structure, fabrics can be given excellent moisture absorption, quick drying and directional moisture conduction properties, thereby imitating the perspiration function of human skin and realizing the preparation of "skin-like" fabrics. Inspired by the unidirectional perspiration of skin pores, Ge et al., a team led by Professor Jiang Gaoming of Jiangnan University, prepared a "skin-like" self-pumping fabric (SPBF) using hydrophilic microfiber polyester, ordinary hydrophobic polyester and staple yarn as raw materials, which can unidirectionally absorb sweat from the skin; the results show that when spandex filaments are introduced into polyester fabrics, the cumulative unidirectional transmission index increases to 717.18%, which is much higher than the cumulative unidirectional transmission index of the original polyester fabric (393.71%). Zhang et al., a team led by Professor Xu Weilin of Wuhan Textile University, proposed a sweat gland-like (Sg-like) fabric. The Sg-like channels formed in the fabric by spraying and ultrasonic welding processes can absorb liquid water from the skin and diffuse it to the outer layer of the fabric for rapid evaporation. Lao et al. prepared a "skin-like" fabric by creating a gradient wetting channel, achieving directional hydrophobicity and water repellency. Huang Xu et al. treated wool with waterproofing and low-temperature plasma to obtain wool with differentiated hydrophilicity; by using wool with different hydrophilicities and water-soluble vinylon blended yarn to prepare a double-sided fabric, an asymmetric wetting gradient was achieved between the veil, connecting yarn and bottom yarn; the gradient of the gap structure from the inside to the outside formed by the hydrolysis of vinylon became smaller, thereby improving the unidirectional moisture conduction of the fabric. Summary of the invention

[0003] Technical problem to be solved: The purpose of the present invention is to provide a skin-like fabric and a preparation method thereof, which can improve the thermal and moisture comfort of the human body by giving the fabric the ability of directional water transport through the treatment of functional components and the coordination of the fabric structure.

[0004] Technical solution: A skin-like fabric, comprising a fabric layer, a hydrophobic porous layer and a hydrophilic layer, wherein the hydrophobic porous layer contains micro-nano pores, and the hydrophilic layer is a porous gel layer. The above-mentioned method for preparing the skin-like fabric comprises the following steps: S1. The discarded poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a certain temperature to obtain a feather protein solution; S2. The hairiness protein solution is filtered and then diluted to obtain a hairiness protein finishing solution; S3. The fabric is immersed in a hairy protein finishing solution, and a certain tension is applied during the dipping process. After the dipping is completed, the finishing liquid remaining on the surface is scraped off to obtain a hairy protein finished fabric; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the amount of the crosslinking agent was 15-20wt% of the water repellent, the amount of ammonium bicarbonate was 0.5-1wt% of the water repellent, and the mixture was stirred to form a water repellent solution of a certain concentration; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side that does not contain the hydrophobic porous layer. After reacting under low temperature and high humidity conditions, apply calcium alginate sol on one side of the sodium alginate solution, and finally freeze-dry at low temperature to obtain a skin-like fabric. Preferably, the temperature of stirring and dissolving in step S1 is 60-80°C, and the concentration of the hairiness protein solution is 8-14wt%. Preferably, the concentration of the hairiness protein finishing solution in step S2 is 1-2wt%. Preferably, the tension in step S3 is 3-8 kgf / cm2. Preferably, the concentration of the fluorine-free waterproofing agent DM-3696 in step S4 is 12-30 g / L. Preferably, the concentration of the sodium alginate solution in step S5 is 1-3 wt %. Preferably, in step S6, the mass ratio of calcium chloride to sodium alginate is 1-2:10. Preferably, the drying temperature in step S7 is 50-80°C. Preferably, the low temperature and high humidity conditions in step S8 are a temperature of 10-30° C., a time of 1-2 h, a humidity of 70-90% RH, and a freeze-drying temperature of -60 to -40° C., and a time of 5-10 h. Beneficial effects: The skin-like fabric of the present invention has the following advantages: 1. The present invention adopts fluorine-free hydrophobic agent coating combined with low-temperature foaming technology to prepare a skin-like fabric. First, a highly hydrolyzed hair protein solution is used to arrange the fabric. Under the action of a certain tension, the hair protein can be attached to the pores of the fabric through intermolecular movement, which is convenient for moisture to be transferred outward; secondly, hydrophobic and hydrophilic treatments are respectively performed on both sides of the fabric, and a certain amount of ammonium bicarbonate is added to the waterproof agent solution. During the drying process, the ammonium bicarbonate will decompose and generate micro-nano holes on the surface of the waterproof film. While ensuring hydrophobicity, it is beneficial for moisture to penetrate from the hydrophobic content to the hydrophilic layer on the outside, thereby improving the effect of moisture absorption and perspiration. The hydrophilic layer on the other side is first coated with sodium alginate, which can react with calcium ions in the hair protein solution to generate calcium alginate, which is beneficial for the transfer of moisture. After the sodium alginate coating, it is coated with a calcium alginate solution, and a gel layer is generated through freeze drying. The gel layer is porous and has a large surface area, which is convenient for the volatilization of moisture, thereby further improving the effect of moisture absorption and perspiration. 2. The skin-like fabric preparation method proposed in the present invention is easy to operate, provides an innovative technical reference for the preparation of thermal and moisture comfortable fabrics, and has good industrial application prospects. DETAILED DESCRIPTION The present invention will be further described below in conjunction with embodiments, which are explanations of the present invention and are not limited to the following embodiments: Example 1 A method for preparing a skin-like fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 80° C. to obtain a feather protein solution with a concentration of 8wt%; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1wt%; S3. Immerse the fabric in the hairy protein finishing solution and apply 3kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water at a concentration of 12 g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the crosslinking agent was used in an amount of 15 wt % of the water repellent, and the amount of ammonium bicarbonate was 1 wt % of the water repellent, and the mixture was stirred and mixed to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 1wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 50°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 30°C, 1 hour, and 70% RH, and coat calcium alginate sol on one side of the sodium alginate solution. Finally, freeze-dry at -40°C for 10 hours to obtain a skin-like fabric. Example 2 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 80° C. to obtain a feather protein solution with a concentration of 14 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 2 wt %; S3. Immerse the fabric in the hairy protein finishing solution and apply 8kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water, the concentration of the fluorine-free water repellent DM-3696 was 30 g / L, a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the amount of the crosslinking agent was 20wt% of the water repellent, the amount of ammonium bicarbonate was 0.5wt% of the water repellent, and the mixture was stirred to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 3wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 80°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 10°C, 2h, and 90%RH, and coat calcium alginate sol on one side of the sodium alginate solution. Finally, freeze-dry at -60°C for 5h to obtain a skin-like fabric. Example 3 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 70° C. to obtain a feather protein solution with a concentration of 12 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1.5 wt %; S3. Immerse the fabric in the hairy protein finishing solution and apply 5kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water at a concentration of 20 g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the crosslinking agent was used in an amount of 16 wt % of the water repellent, and the amount of ammonium bicarbonate was used in an amount of 0.7 wt % of the water repellent, and the mixture was stirred to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 2wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 70°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 20°C, 1.5h, and 85%RH. Coat one side of the sodium alginate solution with calcium alginate sol, and finally freeze-dry at -60°C for 8h to obtain a skin-like fabric. Example 4 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 65° C. to obtain a feather protein solution with a concentration of 14 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1.2 wt %; S3. Immerse the fabric in the hairy protein finishing solution and apply 5kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water at a concentration of 16 g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the crosslinking agent was used in an amount of 16 wt % of the water repellent, and the amount of ammonium bicarbonate was used in an amount of 0.6 wt % of the water repellent, and the mixture was stirred and mixed to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 1.5wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.2:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 60°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 25°C, 1 hour, and 85% RH. Coat calcium alginate sol on one side of the sodium alginate solution, and finally freeze-dry at -60°C for 10 hours to obtain a skin-like fabric. Example 5 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 75° C. to obtain a feather protein solution with a concentration of 8 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1.6 wt %; S3. Immerse the fabric in the hairy protein finishing solution and apply 5kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water at a concentration of 25 g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the crosslinking agent was used in an amount of 18 wt % of the water repellent, and the amount of ammonium bicarbonate was used in an amount of 0.8 wt % of the water repellent, and the mixture was stirred to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 2.5wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.8:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 70°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 15°C, 2h, and 80%RH, and coat calcium alginate sol on one side of the sodium alginate solution. Finally, freeze-dry at -40°C for 5h to obtain a skin-like fabric. Comparative Example 1 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 70° C. to obtain a feather protein solution with a concentration of 12 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1.5 wt %; S3. The fabric is immersed in a hairy protein finishing solution, and after the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a hairy protein finished fabric; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water at a concentration of 20 g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the crosslinking agent was used in an amount of 16 wt % of the water repellent, and the amount of ammonium bicarbonate was used in an amount of 0.7 wt % of the water repellent, and the mixture was stirred to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 2wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 65°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 20°C, 1.5h, and 85%RH. Coat one side of the sodium alginate solution with calcium alginate sol, and finally freeze-dry at -60°C for 8h to obtain a skin-like fabric. Comparative Example 2 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 70° C. to obtain a feather protein solution with a concentration of 12 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1.5 wt %; S3. Immerse the fabric in the hairy protein finishing solution and apply 20kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water at a concentration of 20 g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the crosslinking agent was used in an amount of 16 wt % of the water repellent, and the amount of ammonium bicarbonate was used in an amount of 0.7 wt % of the water repellent, and the mixture was stirred to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 2wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 70°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 20°C, 1.5h, and 85%RH. Coat one side of the sodium alginate solution with calcium alginate sol, and finally freeze-dry at -60°C for 8h to obtain a skin-like fabric. Comparative Example 3 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 70° C. to obtain a feather protein solution with a concentration of 12 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1.5 wt %; S3. Immerse the fabric in the hairy protein finishing solution and apply 5kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water, the concentration of the fluorine-free water repellent DM-3696 was 20 g / L, and a crosslinking agent DM-3915N was added, wherein the amount of the crosslinking agent was 16wt% of the water repellent, and the mixture was stirred to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 2wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the fabric prepared in step S3, and then dried at a temperature of 70°C to obtain a fabric containing a hydrophobic layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic layer, and react under low temperature and high humidity conditions, which are 20°C, 1.5h, and 85%RH. Coat one side of the sodium alginate solution with calcium alginate sol, and finally freeze-dry at -60°C for 8h to obtain a skin-like fabric. Comparative Example 4 A method for preparing a skin fabric, the method comprising the following steps: S1. The fluorine-free waterproofing agent DM-3696 was dissolved in deionized water, the concentration of the fluorine-free waterproofing agent DM-3696 was 20g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the amount of the crosslinking agent was 16wt% of the waterproofing agent, the amount of ammonium bicarbonate was 0.7wt% of the waterproofing agent, and the mixture was stirred to form a waterproofing agent solution; S2. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 2 wt%; S3. Take part of the sodium alginate solution prepared in step S2, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, and stir to obtain a calcium alginate sol; S4. The solution prepared in step S1 is coated on one side of the fabric prepared in step S3, and then dried at a temperature of 65°C to obtain a fabric containing a hydrophobic porous layer; S5. Spray the sodium alginate solution prepared in step S2 onto the surface of the fabric on the side without the hydrophobic porous layer, and react under low temperature and high humidity conditions, which are 20°C, 1.5h, and 85%RH. Coat calcium alginate sol on one side of the sodium alginate solution, and finally freeze-dry at -60°C for 8h to obtain a skin-like fabric. Comparative Example 5 A method for preparing a skin fabric, the method comprising the following steps: S1. The waste poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a temperature of 70° C. to obtain a feather protein solution with a concentration of 12 wt %; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing solution with a concentration of 1.5 wt %; S3. Immerse the fabric in the hairy protein finishing solution and apply 5kgf / cm during the immersion process. 2 After the impregnation is completed, the finishing liquid remaining on the surface is scraped off to obtain a fabric finished with hairiness protein; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water at a concentration of 20 g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the crosslinking agent was used in an amount of 16 wt % of the water repellent, and the amount of ammonium bicarbonate was used in an amount of 0.7 wt % of the water repellent, and the mixture was stirred to form a water repellent solution; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution having a concentration of 2wt%; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried at a temperature of 65°C to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side without the hydrophobic porous layer. After reacting under low temperature and high humidity conditions, the low temperature and high humidity conditions are 20°C, 1.5h, and 85%RH. Coat calcium alginate sol on one side of the sodium alginate solution, and finally dry to obtain a skin-like fabric. Testing and Characterization: Air permeability measurement: According to GB / T 5453-1997 "Determination of air permeability of textile fabrics", a fully automatic air permeability meter for fabrics (YG461E-Ⅲ digital, Ningbo Textile Instrument Factory) was used, with the test pressure difference set to 100 Pa and the test area to 20 cm 2 , place the fabric sample on the selected setting circle. After the sample is placed, press the sample clamping handle to make the clamping circle press the sample tightly. Start the suction fan to make air pass through the sample and test the air permeability values ​​of different samples. During the test, 10 different positions of each sample are selected for measurement, and the average value is calculated to compare the air permeability changes before and after treatment. Water vapor permeability measurement: According to GB / T 12704.2-2009 "Test method for water vapor permeability of textile fabrics Part 2: Evaporation method", the water vapor permeability of the fabric is measured by the positive cup method, and the temperature is set to (38±2)℃ and the relative humidity is (50±2)%. The test assembly is weighed after 1 hour of equilibrium, and then weighed again after 1 hour of test time. A computerized fabric water vapor permeability meter (YG601H-Ⅱ model, Ningbo Textile Instrument Factory) is used to take 3 samples for testing, and the average value of the results is calculated. Fabric back air permeability mm / s <![CDATA[Water vapor transmission rate on the reverse side of the fabric g / (m 2 ·h)]]> Example 1 75.6 198.1 Example 2 72.9 189.6 Example 3 76.2 194.5 Example 4 74.4 192.7 Example 5 75.3 195.8 Comparative Example 1 70.6 168.9 Comparative Example 2 71.2 166.8 Comparative Example 3 52.3 133.6 Comparative Example 4 67.8 145.9 Comparative Example 5 66.4 156.7 Fabric base material 77.8 132.3 Note: The above fabric base materials are all 230T polyester. Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A skin-like fabric, characterized in that: The skin-like fabric comprises a fabric layer, a hydrophobic porous layer and a hydrophilic layer, wherein the hydrophobic porous layer contains micro-nano pores, and the hydrophilic layer is a porous gel layer.

2. The method for preparing the skin-like fabric according to claim 1, characterized in that: The preparation method comprises the following steps: S1. The discarded poultry feathers are cleaned and then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:2, and the solution is stirred at a certain temperature to obtain a feather protein solution; S2. The hairiness protein solution is filtered and then diluted to obtain a hairiness protein finishing solution; S3. The fabric is immersed in a hairy protein finishing solution, and a certain tension is applied during the dipping process. After the dipping is completed, the finishing liquid remaining on the surface is scraped off to obtain a hairy protein finished fabric; S4. The fluorine-free water repellent DM-3696 was dissolved in deionized water, and a crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the amount of the crosslinking agent was 15-20wt% of the water repellent, the amount of ammonium bicarbonate was 0.5-1wt% of the water repellent, and the mixture was stirred to form a water repellent solution of a certain concentration; S5. Dissolve sodium alginate in water and stir to obtain a sodium alginate solution; S6. Take part of the sodium alginate solution prepared in step S5, add the calcium chloride solution to the sodium alginate solution, and stir to obtain a calcium alginate sol; S7. The solution prepared in step S4 is coated on one side of the surface of the fabric prepared in step S3, and then dried to obtain a fabric containing a hydrophobic porous layer; S8. Spray the sodium alginate solution prepared in step S5 onto the surface of the fabric on the side that does not contain the hydrophobic porous layer. After reacting under low temperature and high humidity conditions, apply calcium alginate sol on one side of the sodium alginate solution, and finally freeze-dry at low temperature to obtain a skin-like fabric.

3. The method for preparing the skin-like fabric according to claim 1, characterized in that: The temperature for stirring and dissolving in step S1 is 60-80° C., and the concentration of the hairiness protein solution is 8-14 wt %.

4. The method for preparing the skin-like fabric according to claim 1, characterized in that: The concentration of the hairiness protein finishing liquid in step S2 is 1-2 wt %.

5. The method for preparing the skin-like fabric according to claim 1, characterized in that: The tension in step S3 is 3-8 kgf / cm 2 .

6. The method for preparing the skin-like fabric according to claim 1, characterized in that: The concentration of the fluorine-free waterproofing agent DM-3696 in step S4 is 12-30 g / L.

7. The method for preparing the skin-like fabric according to claim 1, characterized in that: The concentration of the sodium alginate solution in step S5 is 1-3 wt %.

8. The method for preparing the skin-like fabric according to claim 1, characterized in that: The mass ratio of calcium chloride to sodium alginate in step S6 is 1-2:

10.

9. The method for preparing the skin-like fabric according to claim 1, characterized in that: The drying temperature in step S7 is 50-80°C.

10. The method for preparing the skin-like fabric according to claim 1, characterized in that: The low temperature and high humidity conditions in step S8 are a temperature of 10-30° C., a time of 1-2 hours, a humidity of 70-90% RH, and a freeze-drying temperature of -60 to -40° C., and a time of 5-10 hours.