A skin-like fabric and a method for making the same

Abstract

The present application provides a kind of skin-like fabric, the skin-like fabric includes fabric layer, hydrophobic porous layer and hydrophilic layer, the hydrophobic porous layer contains micro-nano-pore, and the hydrophilic layer is porous gel layer.The present application provides a kind of skin-like fabric and its preparation method, by the treatment of functional components and the cooperation of fabric structure, directional water transport capacity is given to fabric, so as to improve human thermal-wet comfort.

Description

TECHNICAL FIELD

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

[0002] In recent years, human thermal-wet comfort management has gradually become a research hotspot. Studies have found that by creating a gradient wetting structure, the fabric can be endowed with excellent moisture absorption and quick drying and directional water conduction performance, thereby simulating the sweat function of human skin and realizing the preparation of "skin-like" fabric. Ge et al. of Jiangnan University Professor Jiang Gaoming's team was inspired by the one-way sweat of skin pores. A "skin-like" self-pumping fabric (SPBF) was prepared by using hydrophilic ultrafine polyester, ordinary hydrophobic polyester and spun yarn as raw materials, which can one-way wick sweat from the skin. The results show that when spandex filaments are introduced into the polyester fabric, the cumulative one-way transmission index increases to 717.18%, which is much higher than the cumulative one-way transmission index (393.71%) of the original polyester fabric. Zhang et al. of Wuhan Textile University Professor Xu Weilin's team proposed a Sg-like fabric. The Sg-like channels formed in the fabric through spraying and ultrasonic welding process can absorb liquid water from the skin and diffuse it to the outer layer of the fabric to realize rapid evaporation. Lao et al. prepared a "skin-like" fabric by creating a gradient wetting channel, which realized the directional hydrophobicity and water repellency of the fabric. Huang Xu et al. treated wool with waterproof and low-temperature plasma to obtain hydrophilic differentiated wool. By using different hydrophilic wool and water-soluble vinylon blended yarn to prepare a double-sided fabric, an asymmetric wetting gradient is realized between the face yarn, connecting yarn and ground yarn. The self-inner-to-outer gap structure gradient formed by the hydrolysis of vinylon becomes smaller, thereby improving the one-way moisture conductivity of the fabric. SUMMARY

[0003] The technical problem to be solved is to provide a skin-like fabric and a preparation method thereof, which endows the fabric with directional water transport capacity by treating functional components and coordinating the fabric structure, thereby improving the human thermal-wet comfort.

[0004] Technical scheme: A skin-like fabric, comprising a fabric layer, a hydrophobic porous layer containing micro-nano pores, and a hydrophilic layer which is a porous gel layer.

[0005] The preparation method of the above-mentioned skin-like fabric comprises the following steps:

[0006] S1. The waste poultry feathers are impurity-removed, then crushed, and then the crushed feathers are dissolved in a ternary solvent of calcium chloride / water / ethanol with a molar ratio of 1:8:2. The solution is stirred at a certain temperature to obtain a feather protein solution;

[0007] S2. The feather protein solution is filtered and diluted to obtain a feather protein finishing solution;

[0008] S3. The fabric is immersed in the feather protein finishing solution and a certain tension is applied during the immersion. After the immersion, the residual finishing solution on the surface is scraped off to obtain a feather protein finished fabric;

[0009] S4. Fluorine-free waterproof agent DM-3696 is dissolved in deionized water, crosslinking agent DM-3915N and ammonium bicarbonate are added, wherein the amount of crosslinking agent is 15-20wt% of the waterproof agent, and the amount of ammonium bicarbonate is 0.5-1wt% of the waterproof agent. Stir to form a waterproof agent solution of a certain concentration;

[0010] S5. Sodium alginate is dissolved in water and stirred uniformly to obtain a sodium alginate solution;

[0011] S6. Part of the sodium alginate solution prepared in step S5 is taken, and a calcium chloride solution is added to the sodium alginate solution, and stirred to obtain a calcium alginate sol;

[0012] S7. The solution prepared in step S4 is coated on one side surface of the fabric prepared in step S3, and then dried to obtain a fabric containing a hydrophobic porous layer;

[0013] S8. The sodium alginate solution prepared in step S5 is sprayed on the side surface of the fabric not containing the hydrophobic porous layer. After reaction under low temperature and high humidity conditions, the calcium alginate sol is coated on the side of the sodium alginate solution, and finally low-temperature freeze-drying is carried out to obtain a skin-like fabric.

[0014] Preferably, the temperature for stirring and dissolving in step S1 is 60-80℃, and the concentration of the feather protein solution is 8-14wt%. Preferably, the concentration of the feather protein finishing solution in step S2 is 1-2wt%.

[0015] Preferably, the tension in step S3 is 3-8kgf / cm2.

[0016] Preferably, the concentration of fluorine-free waterproof agent DM-3696 in step S4 is 12-30g / L.

[0017] Preferably, the concentration of the sodium alginate solution in step S5 is 1-3wt%.

[0018] Preferably, the mass ratio of calcium chloride to sodium alginate in step S6 is 1-2:10.

[0019] Preferably, the drying temperature in step S7 is 50-80℃.

[0020] Preferably, the low-temperature and high-humidity conditions in step S8 are 10-30℃, 1-2h, 70-90% RH, -60~-40℃, and 5-10h, respectively.

[0021] Advantages: The skin-like fabric has the following advantages:

[0022] 1. In the present application, a skin-like fabric is prepared by using a fluorine-free hydrophobic agent and low-temperature foaming technology. First, the fabric is treated with a highly hydrolyzed feather protein solution. Under the action of a certain tension, the feather protein can be attached to the pores of the fabric through intermolecular motion, facilitating the outward transmission of water. Second, the two sides of the fabric are treated with hydrophobic and hydrophilic agents, respectively. In the waterproof agent solution, a certain amount of ammonium bicarbonate is added. During the drying process, ammonium bicarbonate decomposes and generates micro-nano holes on the surface of the waterproof film, which helps water penetrate from the hydrophobic content to the hydrophilic layer on the outside, improving the moisture absorption and perspiration effect. The other side of the hydrophilic layer is coated with sodium alginate, which can react with calcium ions in the feather protein solution to form calcium alginate, facilitating water transmission. After coating with sodium alginate, the fabric is coated with a calcium alginate solution and then freeze-dried to form a gel layer. The gel layer is porous and has a large surface area, which facilitates water evaporation and further improves the moisture absorption and perspiration effect.

[0023] 2. The preparation method of the skin-like fabric is simple and provides an innovative technical reference for the preparation of thermal and moisture comfort fabrics, which has good industrial application prospects. DETAILED DESCRIPTION

[0024] The present application will be further described below in conjunction with examples. The following examples are illustrative of the present application and the present application is not limited to the following examples:

[0025] Example 1

[0026] The preparation method of the skin-like fabric comprises the following steps:

[0027] S1. The waste poultry feathers are cleaned, crushed, and then dissolved in a ternary solvent of calcium chloride / water / ethanol with a molar ratio of 1:8:2. The solution is stirred at a temperature of 80℃ 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%;

[0028] S3. The fabric is immersed in the feather protein finishing solution, and a tension of 3kgf / cm 2 is applied during the immersion process. After the immersion is completed, the residual finishing solution on the surface is scraped off to obtain a feather protein finished fabric;

[0029] S4. Dissolve the fluorine-free waterproofing agent DM-3696 in deionized water, the concentration of the fluorine-free waterproofing agent DM-3696 is 12 g / L, add the crosslinking agent DM-3915N and ammonium bicarbonate, wherein the amount of the crosslinking agent is 15wt% of the waterproofing agent, and the amount of ammonium bicarbonate is 1wt% of the waterproofing agent, and stir to form a waterproofing agent solution;

[0030] S5. Dissolve sodium alginate in water and stir uniformly to obtain a sodium alginate solution with a concentration of 1wt%;

[0031] S6. Take part of the sodium alginate solution prepared in step S5, and add a 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;

[0032] S7. Coating the solution prepared in step S4 on one side surface of the fabric prepared in step S3 respectively, and then drying at a temperature of 50℃ to obtain a fabric containing a hydrophobic porous layer;

[0033] S8. Spraying the sodium alginate solution prepared in step S5 on the side surface of the fabric not containing the hydrophobic porous layer, and after reaction under low-temperature and high-humidity conditions, the low-temperature and high-humidity conditions are a temperature of 30℃, a time of 1h, and a humidity of 70%RH, coating the calcium alginate sol on the side of the sodium alginate solution, and finally low-temperature freeze-drying at a temperature of -40℃ for 10h to obtain a skin-like fabric.

[0034] Example 2

[0035] A method for preparing a skin fabric, the method comprising the following steps:

[0036] S1. Impurity removal is performed on waste poultry feathers, which are then crushed and dissolved in a ternary solvent of calcium chloride / water / ethanol with a molar ratio of 1:8:2, and the solution is stirred at a temperature of 80℃ to obtain a feather protein solution with a concentration of 14wt%;

[0037] S3. The fabric is immersed in the feather protein finishing liquid, and a tension of 8kgf / cm 2 is applied during the immersion process, and after the immersion process, the surface residual finishing liquid is scraped off to obtain a feather protein finished fabric;

[0038] S4. 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, crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the amount of crosslinking agent was 20 wt% of the water repellent, and the amount of ammonium bicarbonate was 0.5 wt% of the water repellent, and the mixture was stirred to form a water repellent solution;

[0039] S5. Sodium alginate was dissolved in water and stirred to obtain a sodium alginate solution with a concentration of 3 wt%;

[0040] S6. Part of the sodium alginate solution prepared in step S5 was taken, and a calcium chloride solution was added to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate was 1.5:10, and the mixture was stirred to obtain a calcium alginate sol;

[0041] S7. The solution prepared in step S4 was coated on one side 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;

[0042] S8. The sodium alginate solution prepared in step S5 was sprayed on the side surface of the fabric not containing the hydrophobic porous layer, and after reaction under low-temperature and high-humidity conditions, the low-temperature and high-humidity conditions were a temperature of 10°C, a time of 2h, and a humidity of 90% RH, a calcium alginate sol was coated on the side of the sodium alginate solution, and finally low-temperature freeze drying was performed at a temperature of -60°C for 5h to obtain a skin-like fabric.

[0043] Example 3

[0044] A method for preparing a skin fabric, the method comprising the following steps:

[0045] S1. The waste poultry feathers were cleaned and then crushed, and then the crushed feathers were dissolved in a ternary solvent of calcium chloride / water / ethanol with a molar ratio of 1:8:2, and the solution was stirred at a temperature of 70°C to obtain a feather protein solution with a concentration of 12 wt%;

[0046] S3. The fabric was immersed in the feather protein finishing liquid, and a tension of 5kgf / cm 2 was applied during the immersion process, and after the immersion was completed, the surface residual finishing liquid was scraped off to obtain a feather protein finished fabric;

[0047] S4. 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, crosslinking agent DM-3915N and ammonium bicarbonate were added, wherein the amount of crosslinking agent was 16 wt% of the water repellent, and the amount of ammonium bicarbonate was 0.7 wt% of the water repellent, and the mixture was stirred to form a water repellent solution;

[0048] S5. Dissolve sodium alginate in water, stir evenly to obtain a sodium alginate solution with a concentration of 2wt%;

[0049] S6. Take part of the sodium alginate solution prepared in step S5, add calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate is 1.5:10, stir to obtain a calcium alginate sol;

[0050] S7. Coating the solution prepared in step S4 on one side surface of the fabric prepared in step S3 respectively, then drying at a temperature of 70℃ to obtain a fabric containing a hydrophobic porous layer;

[0051] S8. Spraying the sodium alginate solution prepared in step S5 on the side surface of the fabric not containing the hydrophobic porous layer, after reaction under low temperature and high humidity conditions, the low temperature and high humidity conditions are a temperature of 20℃, a time of 1.5h, and a humidity of 85%RH, coating the calcium alginate sol on the side of the sodium alginate solution, and finally low-temperature freeze-drying at a temperature of -60℃ for 8h to obtain a skin-like fabric.

[0052] Example 4

[0053] The preparation method of the skin fabric comprises the following steps:

[0054] S1. Impurities are removed from the discarded poultry feathers, which are then crushed and dissolved in a ternary solvent of calcium chloride / water / ethanol with a molar ratio of 1:8:2, and the solution is stirred at a temperature of 65℃ to obtain a feather protein solution with a concentration of 14wt%;

[0055] S3. The fabric is immersed in the feather protein finishing liquid, and a tension of 5kgf / cm 2 is applied during the immersion process. After the immersion process is completed, the residual finishing liquid on the surface is scraped off to obtain a feather protein finished fabric;

[0056] S4. Dissolve the fluorine-free waterproof agent DM-3696 in deionized water, the concentration of the fluorine-free waterproof agent DM-3696 is 16g / L, add crosslinking agent DM-3915N and ammonium bicarbonate, wherein the amount of crosslinking agent is 16wt% of the waterproof agent, and the amount of ammonium bicarbonate is 0.6wt% of the waterproof agent, stir and mix to form a waterproof agent solution;

[0057] S5. Dissolve sodium alginate in water, stir evenly to obtain a sodium alginate solution with a concentration of 1.5wt%;

[0058] S6. Take part of the sodium alginate solution prepared in step S5, add calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride and sodium alginate is 1.2:10, and stir to obtain a calcium alginate sol;

[0059] S7. The solution prepared in step S4 is respectively coated on one side 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;

[0060] S8. The sodium alginate solution prepared in step S5 is sprayed on the side surface of the fabric not containing the hydrophobic porous layer, and after reaction under low-temperature and high-humidity conditions, the low-temperature and high-humidity conditions are a temperature of 25°C, a time of 1h, and a humidity of 85% RH, a calcium alginate sol is coated on the side of the sodium alginate solution, and finally low-temperature freeze drying is performed at a temperature of -60°C for 10h to obtain a skin-like fabric.

[0061] Example 5

[0062] A method for preparing a skin fabric, the method comprising the following steps:

[0063] S1. Impurities are removed from discarded poultry feathers, and then the feathers are crushed and dissolved in a ternary solvent of calcium chloride / water / ethanol at 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 8wt%; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing liquid with a concentration of 1.6wt%;

[0064] S3. The fabric is immersed in the feather protein finishing liquid, and a tension of 5kgf / cm 2 is applied during the immersion process, and after the immersion process is completed, the surface residual finishing liquid is scraped off to obtain a feather protein finished fabric;

[0065] S4. Fluorine-free waterproof agent DM-3696 is dissolved in deionized water, the concentration of the fluorine-free waterproof agent DM-3696 is 25g / L, crosslinking agent DM-3915N and ammonium bicarbonate are added, wherein the amount of the crosslinking agent is 18wt% of the waterproof agent, and the amount of the ammonium bicarbonate is 0.8wt% of the waterproof agent, and the mixture is stirred to form a waterproof agent solution;

[0066] S5. Sodium alginate is dissolved in water and stirred uniformly to obtain a sodium alginate solution with a concentration of 2.5wt%;

[0067] S6. Take part of the sodium alginate solution prepared in step S5, add calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride and sodium alginate is 1.8:10, and stir to obtain a calcium alginate sol;

[0068] S7. The solution prepared in step S4 is coated on one side surface of the fabric prepared in step S3 respectively, and then dried at a temperature of 70°C to obtain a fabric containing a hydrophobic porous layer;

[0069] S8. The sodium alginate solution prepared in step S5 is sprayed on the side surface of the fabric not containing the hydrophobic porous layer, and after reaction under low-temperature and high-humidity conditions, i.e. at a temperature of 15°C for 2h and a humidity of 80% RH, a calcium alginate sol is coated on the side of the sodium alginate solution, and finally low-temperature freeze drying is performed at a temperature of -40°C for 5h to obtain a skin-like fabric.

[0070] Comparative Example 1

[0071] A method for preparing a skin fabric, the method comprising the following steps:

[0072] 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 at 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 12wt%; S2. The feather protein solution is filtered and then diluted to obtain a feather protein finishing liquid with a concentration of 1.5wt%;

[0073] S3. The fabric is immersed in the feather protein finishing liquid, and after the immersion is completed, the finishing liquid remaining on the surface is scraped off to obtain a feather protein finished fabric;

[0074] S4. A fluorine-free waterproof agent DM-3696 is dissolved in deionized water, and the concentration of the fluorine-free waterproof agent DM-3696 is 20g / L, and a crosslinking agent DM-3915N and ammonium bicarbonate are added, wherein the amount of the crosslinking agent is 16wt% of the waterproof agent, and the amount of the ammonium bicarbonate is 0.7wt% of the waterproof agent, and the mixture is stirred to form a waterproof agent solution;

[0075] S5. Sodium alginate is dissolved in water and stirred uniformly to obtain a sodium alginate solution with a concentration of 2wt%;

[0076] S6. Part of the sodium alginate solution prepared in step S5 is taken, and a calcium chloride solution is added to the sodium alginate solution, and the mass ratio of calcium chloride to sodium alginate is 1.5:10, and the mixture is stirred to obtain a calcium alginate sol;

[0077] S7. The solution prepared in step S4 is coated on one side surface of the fabric prepared in step S3 respectively, and then dried at a temperature of 65°C to obtain a fabric containing a hydrophobic porous layer;

[0078] S8. The sodium alginate solution prepared in step S5 is sprayed on the surface of one side of the fabric without the hydrophobic porous layer, and after reaction under low-temperature and high-humidity conditions, the low-temperature and high-humidity conditions are a temperature of 20°C, a time of 1.5 h, and a humidity of 85% RH. A calcium alginate sol is coated on the side of the sodium alginate solution, and finally low-temperature freeze drying is performed at a temperature of -60°C for 8 h to obtain a skin-like fabric.

[0079] Comparative Example 2

[0080] A method for preparing a skin fabric, the method comprising the steps of:

[0081] S1. The waste poultry feathers are cleaned, crushed, and then dissolved in a ternary solvent of calcium chloride / water / ethanol at a molar ratio of 1:8:2. 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 liquid with a concentration of 1.5 wt%;

[0082] S3. The fabric is immersed in the feather protein finishing liquid, and a tension of 20 kgf / cm 2 is applied during the immersion process. After the immersion process is completed, the surface residual finishing liquid is scraped off to obtain a feather protein finished fabric;

[0083] S4. The fluorine-free waterproof agent DM-3696 is dissolved in deionized water, and the concentration of the fluorine-free waterproof agent DM-3696 is 20 g / L. The crosslinking agent DM-3915N and ammonium bicarbonate are added, wherein the amount of the crosslinking agent is 16 wt% of the waterproof agent, and the amount of the ammonium bicarbonate is 0.7 wt% of the waterproof agent. The mixture is stirred to form a waterproof agent solution;

[0084] S5. Sodium alginate is dissolved in water and stirred uniformly to obtain a sodium alginate solution with a concentration of 2 wt%;

[0085] S6. Part of the sodium alginate solution prepared in step S5 is taken, and a calcium chloride solution is added to the sodium alginate solution. The mass ratio of calcium chloride to sodium alginate is 1.5:10, and the mixture is stirred to obtain a calcium alginate sol;

[0086] S7. The solution prepared in step S4 is coated on one side of the fabric prepared in step S3, respectively, and then dried at a temperature of 70°C to obtain a fabric containing a hydrophobic porous layer;

[0087] S8. The sodium alginate solution prepared in step S5 is sprayed on the surface of one side of the fabric without the hydrophobic porous layer, and after reaction under low temperature and high humidity conditions, the low temperature and high humidity conditions are a temperature of 20°C, a time of 1.5 h, and a humidity of 85% RH. A calcium alginate sol is coated on the side of the sodium alginate solution, and finally low-temperature freeze drying is performed at a temperature of -60°C for 8 h to obtain a skin-like fabric.

[0088] Comparative Example 3

[0089] A method for preparing a skin fabric, the method comprising the steps of:

[0090] 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 at a molar ratio of 1:8:2. 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 liquid with a concentration of 1.5 wt%;

[0091] S3. The fabric is immersed in the feather protein finishing liquid, and a tension of 5 kgf / cm 2 is applied during the immersion process. After the immersion process is completed, the surface residual finishing liquid is scraped off to obtain a feather protein finished fabric;

[0092] S4. The fluorine-free waterproof agent DM-3696 is dissolved in deionized water, and the concentration of the fluorine-free waterproof agent DM-3696 is 20 g / L. A crosslinking agent DM-3915N is added, wherein the amount of the crosslinking agent is 16 wt% of the waterproof agent. The mixture is stirred to form a waterproof agent solution;

[0093] S5. Sodium alginate is dissolved in water and stirred uniformly to obtain a sodium alginate solution with a concentration of 2 wt%;

[0094] S6. Part of the sodium alginate solution prepared in step S5 is taken, and a calcium chloride solution is added to the sodium alginate solution. The mass ratio of calcium chloride to sodium alginate is 1.5:10. The mixture is stirred to obtain a calcium alginate sol;

[0095] 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;

[0096] S8. The sodium alginate solution prepared in step S5 is sprayed on the surface of one side of the fabric without the hydrophobic layer, and after reaction under low temperature and high humidity conditions, the low temperature and high humidity conditions are a temperature of 20°C, a time of 1.5 h, and a humidity of 85% RH. A calcium alginate sol is coated on the side of the sodium alginate solution, and finally low-temperature freeze drying is performed at a temperature of -60°C for 8 h to obtain a skin-like fabric.

[0097] Comparative Example 4

[0098] A method for preparing a skin fabric, the method comprising the steps of:

[0099] S1. Dissolving the fluorine-free waterproofing agent DM-3696 in deionized water, the concentration of the fluorine-free waterproofing agent DM-3696 being 20 g / L, adding the crosslinking agent DM-3915N and ammonium bicarbonate, wherein the amount of the crosslinking agent is 16 wt% of the waterproofing agent, and the amount of ammonium bicarbonate is 0.7 wt% of the waterproofing agent, and stirring to form a waterproofing agent solution;

[0100] S2. Dissolving sodium alginate in water, and stirring to obtain a sodium alginate solution with a concentration of 2 wt%;

[0101] S3. Taking part of the sodium alginate solution prepared in step S2, and adding a calcium chloride solution to the sodium alginate solution, the mass ratio of calcium chloride to sodium alginate being 1.5:10, and stirring to obtain a calcium alginate sol;

[0102] S4. Coating the solution prepared in step S1 on one side surface of the fabric prepared in step S3, respectively, and then drying at a temperature of 65°C to obtain a fabric containing a hydrophobic porous layer;

[0103] S5. Spraying the sodium alginate solution prepared in step S2 on the side surface of the fabric not containing the hydrophobic porous layer, and after reaction under low-temperature and high-humidity conditions, coating the calcium alginate sol on the side of the sodium alginate solution, and finally freeze-drying at a temperature of -60°C for 8 h to obtain a skin-like fabric.

[0104] Comparative Example 5

[0105] A method for preparing a skin fabric, the method comprising the steps of:

[0106] S1. Removing impurities from waste poultry feathers, and then crushing the feathers, and then dissolving the crushed feathers in a ternary solvent of calcium chloride / water / ethanol at a molar ratio of 1:8:2, and stirring the solution at a temperature of 70°C to obtain a feather protein solution with a concentration of 12 wt%;

[0107] S3. Immersing the fabric in the feather protein finishing liquid, and applying a tension of 5 kgf / cm 2 during the immersion process, and after the immersion process, scraping off the finishing liquid remaining on the surface to obtain a feather protein finished fabric;

[0108] S4. Dissolve the fluorine-free waterproofing agent DM-3696 in deionized water, the concentration of the fluorine-free waterproofing agent DM-3696 is 20 g / L, add the crosslinking agent DM-3915N and ammonium bicarbonate, wherein the amount of the crosslinking agent is 16 wt% of the waterproofing agent, and the amount of the ammonium bicarbonate is 0.7 wt% of the waterproofing agent, and stir to form a waterproofing agent solution;

[0109] S5. Dissolve the sodium alginate in water and stir to obtain a sodium alginate solution with a concentration of 2 wt%;

[0110] S6. Take part of the sodium alginate solution prepared in step S5, and add a 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;

[0111] S7. Coating the solution prepared in step S4 on one side surface of the fabric prepared in step S3 respectively, and then drying at a temperature of 65℃ to obtain a fabric containing a hydrophobic porous layer;

[0112] S8. Spraying the sodium alginate solution prepared in step S5 on the side surface of the fabric not containing the hydrophobic porous layer, and after reaction under low-temperature and high-humidity conditions, coating the calcium alginate sol on the side of the sodium alginate solution, and finally drying to obtain a skin-like fabric.

[0113] Test and characterization:

[0114] Air permeability measurement: According to the standard GB / T 5453-1997 "Determination of air permeability of textile fabrics", a full-automatic air permeability tester (YG461E-III digital type, Ningbo Textile Instrument Factory) is used, the test pressure difference is set to 100 Pa, the test area is set to 20 cm 2 Place the fabric sample on the selected constant value ring, after placing the sample, press the sample compression handle to compress the sample with the compression ring, start the air suction machine to make air pass through the sample, and test the air permeability values of different samples. When testing, 10 different positions of each sample are selected for measurement, and the average value is calculated to compare the air permeability change before and after treatment.

[0115] Moisture permeability measurement: According to the standard GB / T 12704.2-2009 "Textile fabric moisture permeability test method part 2: evaporation method", the positive cup method is used to measure the moisture permeability of the fabric, the temperature is set to (38±2)℃, and the relative humidity is set to (50±2)%. After the test assembly is balanced for 1 h, it is weighed, and then weighed again after 1 h of test time. Take 3 samples for testing using a computerized fabric moisture permeability tester (YG601H-II type, Ningbo Textile Instrument Factory), and the average value is calculated.

[0116] Fabric backside air permeability mm / s Fabric back face moisture permeation amount 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 substrate 77.8 132.3

[0117] Note: The above fabric substrates are all 230T polyester.

[0118] Obviously, the above-mentioned embodiments are only examples for clearly illustrating the present application, but not limitation on the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A skin-like fabric, characterized in that: The skin-like fabric includes a fabric layer, a hydrophobic porous layer, and a hydrophilic layer. The hydrophobic porous layer contains micro- and nano-pores, and the hydrophilic layer is a porous gel layer. The above-mentioned method for preparing skin-like fabric includes the following steps: S1. Remove impurities from waste poultry feathers, then crush them, and then dissolve the crushed feathers in a ternary solvent of calcium chloride / water / ethanol in a molar ratio of 1:8:

2. Stir the solution at a certain temperature to obtain a feather protein solution. S2. Filter and dilute the feather protein solution to obtain the feather protein finishing solution; S3. Immerse the fabric in the feather protein finishing solution and apply a certain tension during the immersion process. After the immersion is completed, scrape off the residual finishing solution on the surface to obtain the feather protein finished fabric. S4. Dissolve the fluorine-free waterproofing agent DM-3696 in deionized water, add the crosslinking agent DM-3915N and ammonium bicarbonate, wherein the amount of crosslinking agent is 15-20wt% of the waterproofing agent and the amount of ammonium bicarbonate is 0.5-1wt% of the waterproofing agent, and stir to form a waterproofing agent solution of a certain concentration. S5. Dissolve sodium alginate in water and stir until homogeneous to obtain a sodium alginate solution; S6. Take a portion of the sodium alginate solution prepared in step S5, add calcium chloride solution to the sodium alginate solution, and stir to obtain calcium alginate sol; S7. Coat one side of the fabric prepared in step S3 with the solution prepared in step S4, and then dry it to obtain a fabric containing a hydrophobic porous layer. S8. Spray the sodium alginate solution prepared in step S5 onto the side of the fabric that does not have a hydrophobic porous layer. After reacting under low temperature and high humidity conditions, coat the sodium alginate solution side with calcium alginate sol. Finally, freeze-dry at low temperature to obtain a skin-like fabric.

2. The skin-like fabric according to claim 1, characterized in that: The temperature for stirring and dissolving in step S1 is 60-80℃, and the concentration of the feather protein solution is 8-14wt%.

3. The skin-like fabric according to claim 1, characterized in that: The concentration of the feather protein finishing solution in step S2 is 1-2 wt%.

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

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

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

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

10.

8. The skin-like fabric according to claim 1, characterized in that: The drying temperature in step S7 is 50-80℃.

9. The skin-like fabric according to claim 1, characterized in that: In step S8, the low temperature and high humidity conditions are: temperature 10-30℃, time 1-2h, humidity 70-90%RH, and freeze-drying temperature -60~-40℃, time 5-10h.