Dynamic moisture absorption and sweat releasing fabric for outdoor sports and preparation method of dynamic moisture absorption and sweat releasing fabric

Abstract

The invention provides a dynamic moisture absorption and sweat releasing fabric for outdoor sports, the fabric is a woven fabric, yarns of the fabric contain temperature-sensitive fibers, the temperature-sensitive fibers are skin-core structure fibers, the cross section of the skin-core structure fibers is a circular cross section, skin-layer fibers in the skin-core structure fibers contain temperature-sensitive expansion phase change microcapsules, and skin-layer fibers in the skin-core structure fibers contain temperature-sensitive expansion phase change microcapsules. And the hardness of the core layer is greater than that of the skin layer. By means of physical changes of heat absorption micro-expansion of the phase change microcapsules, the surfaces of the circular-section fibers protrude, meanwhile, the fabric coverage rate of the fabric is optimized, it is obtained through multiple times of verification that the fabric coverage rate is in the range of 94%-98%, the fabric coverage rate continues to be increased through micro-expansion of the microcapsules, and the fabric coverage rate is increased through the capillary effect. The fibers can quickly absorb moisture and sweat on the skin surface, and the moisture and sweat are diffused and transmitted to the outer layer to achieve the purpose of moisture absorption and sweat releasing.

Description

Technical Field

[0001] The present invention relates to the field of intelligent fabrics, and in particular to a dynamic moisture absorption and perspiration wicking fabric for outdoor sports and a preparation method thereof. Background Art

[0002] Moisture wicking fabric is a textile with moisture absorption, moisture conduction and quick drying functions. It can control the direction of moisture conduction so that the sweat produced by the human body is conducted from the inside of the fabric to the outer surface of the fabric, and finally discharge the sweat into the outside atmosphere through the evaporation of water, thereby improving the comfort of wearing clothing. The function of moisture-wicking woven fabrics mainly depends on their special fiber structure and chemical composition. These fibers usually have a high specific surface area, with numerous micropores or grooves on the surface, and their cross-sections are generally special shapes. Using the capillary effect, these fibers can quickly absorb moisture and sweat from the skin surface and diffuse and transfer them to the outer layer to dissipate. For example, the "coolmax" polyester produced by DuPont in the United States has a unique flat cross-shaped cross-section, with four grooves on the fiber surface longitudinally, which is 20% larger than the conventional circular cross-section, so the sweat-wicking performance is higher than that of conventional polyester. The production methods of moisture-wicking woven fabrics mainly include physical and chemical modifications, or a combination of the two. For example, the moisture conductivity of the fiber can be improved by changing the shape of the spinneret hole, or a polymer containing a hydrophilic group can be blended with polyester chips, and a specially designed special-shaped spinneret can be used to produce moisture-wicking fibers. In addition, hydrophilic groups can be introduced into the macromolecular structure through graft copolymerization to increase the moisture-wicking function of the fiber. At present, fibers with circular cross-sections generally achieve the effect of moisture-wicking through post-finishing or the design of specific fabric structures, and there is no method to achieve the moisture-wicking effect through intelligent response. Summary of the invention

[0003] Technical problem to be solved: The purpose of the present invention is to provide a dynamic moisture wicking fabric for outdoor sports, which adopts circular cross-section fibers with a skin-core structure and obtains a moisture wicking fabric through intelligent temperature response.

[0004] Technical solution: A dynamic moisture wicking fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains thermosensitive fibers, the thermosensitive fibers are core-skin structure fibers, and the cross-section of the core-skin structure fibers is a circular cross-section, the skin fibers in the core-skin structure fibers contain thermosensitive expansion phase change microcapsules, and the hardness of the core layer is greater than that of the skin layer. The preparation method of the above-mentioned dynamic moisture wicking fabric for outdoor sports, the preparation method of the fabric comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 10-15wt%, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of the nano-ceramic particles in the spinning solution was 10-20wt%, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 10-15wt%, and the thermosensitive expansion phase change microcapsules were added to the spinning solution and stirred to mix evenly, the content of the thermosensitive expansion phase change microcapsules in the spinning solution was 10-20wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 94-98%, and one side of the fabric is hydrophobically finished to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Preferably, the method for preparing the thermosensitive expandable phase-change microcapsules comprises the following steps: S11. Stir and mix n-eicosane and decanoic acid in a water bath at 40-45° C., and cool to room temperature to obtain a binary composite core material; S12. Add the binary composite core material to an aqueous solution containing Span 80, heat in a water bath to 80-90° C., emulsify, and obtain an emulsion; S13. Add methyl methacrylate, azobisisobutyronitrile and ethylene glycol dimethacrylate to the emulsion in sequence, and polymerize for 2-6 hours while stirring to obtain binary phase change microcapsules. Preferably, in step S11, the mass ratio of n-eicosane to decanoic acid is 1-5:10. Preferably, the mass ratio of the binary composite core material, methyl methacrylate, ethylene glycol dimethacrylate and azobisisobutylcyanide is 10-15:10-15:0.8-1.5:0.2-0.5. Preferably, the stirring rate in step S13 is 800-1200 r / min. Preferably, the nano-ceramic particles include any one or more of nano-alumina, nano-silicon dioxide, nano-titanium dioxide or nano-zirconium oxide. Preferably, the diameter of the core-skin structure fiber is 18-25 um, and the thickness of the skin layer is 5-7 um. Beneficial effects: The dynamic moisture absorption and perspiration wicking fabric for outdoor sports of the present invention has the following advantages: 1. The present invention prepares a temperature-responsive moisture-absorbing and perspiration-releasing fabric. In the past, phase-change microcapsules were used for fabric finishing to absorb body temperature. Through the phase change process of the material, the skin surface temperature is reduced to provide a cool feeling. In the present invention, the physical change of the phase-change microcapsules absorbing heat and micro-expanding causes the surface of the circular cross-section fiber to bulge. At the same time, the fabric coverage of the fabric is optimized. After multiple verifications, it is found that the fabric coverage is within the range of 94-98%. Through the micro-expansion of the microcapsules, the fabric coverage continues to increase. By utilizing the capillary effect, the fiber can quickly absorb moisture and sweat from the skin surface, and diffuse and transfer them to the outer layer to achieve the purpose of moisture absorption and perspiration. 2. The hardness of the skin layer and the core layer of the skin-core fiber of the present invention is different. A certain amount of nano-ceramic particles is added to the core layer to increase the hardness of the core layer. When the microcapsules of the skin-core fiber expand during heat absorption, they can only expand and bulge toward the outer surface of the fiber to obtain an uneven surface. 3. In the present invention, the size of the microcapsules is prepared to be micrometer level, and the thickness of the shell is controlled at 5-7um, which is conducive to the expansion and bulging of the microcapsules, and finally a fabric for outdoor sports is obtained through intelligent response to temperature. 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 The preparation method of the thermosensitive expansion phase change microcapsule comprises the following steps: S11. After stirring and mixing n-eicosane and decanoic acid in a water bath at 40° C., the mass ratio of n-eicosane to decanoic acid is 1:10, and cooling to room temperature to obtain a binary composite core material; S12. The binary composite core material is added to an aqueous solution containing Span 80, heated in a water bath to 80°C, and emulsified to obtain an emulsion having a concentration of 8wt%; S13. Add methyl methacrylate, azobisisobutyronitrile and ethylene glycol dimethacrylate to the emulsion in sequence. The mass ratio of methyl methacrylate, ethylene glycol dimethacrylate and azobisisobutyronitrile in the binary composite core system is 10:10:0.8:0.2. The reaction is polymerized for 2 hours while stirring at a rate of 800 r / min to obtain binary phase change microcapsules. Example 2 The preparation method of the thermosensitive expansion phase change microcapsule comprises the following steps: S11. After stirring and mixing n-eicosane and decanoic acid in a water bath at 45° C., the mass ratio of n-eicosane to decanoic acid is 1:2, and cooling to room temperature to obtain a binary composite core material; S12. The binary composite core material is added to an aqueous solution containing Span 80, heated in a water bath to 90°C, and emulsified to obtain an emulsion having a concentration of 10wt%; S13. Methyl methacrylate, azobisisobutyronitrile and ethylene glycol dimethacrylate are added to the emulsion in sequence. The mass ratio of methyl methacrylate, ethylene glycol dimethacrylate and azobisisobutyronitrile in the binary composite core system is 15:15:1.5:0.5. The reaction is polymerized for 6 hours while stirring at a rate of 1200 r / min to obtain binary phase change microcapsules. Example 3 The preparation method of the thermosensitive expansion phase change microcapsule comprises the following steps: S11. After stirring and mixing n-eicosane and decanoic acid in a water bath at 40° C., the mass ratio of n-eicosane to decanoic acid is 2.2:10, and cooling to room temperature to obtain a binary composite core material; S12. The binary composite core material is added to an aqueous solution containing Span 80, heated in a water bath to 85°C, and emulsified to obtain an emulsion having a concentration of 6.8wt%; S13. Methyl methacrylate, azobisisobutyronitrile and ethylene glycol dimethacrylate are added to the emulsion in sequence. The mass ratio of methyl methacrylate, ethylene glycol dimethacrylate and azobisisobutyronitrile in the binary composite core material of the reaction system is 12:12:1:0.3. The reaction is polymerized for 5 hours while stirring at a rate of 950 r / min to obtain binary phase change microcapsules. Example 4 The preparation method of the thermosensitive expansion phase change microcapsule comprises the following steps: S11. After stirring and mixing n-eicosane and decanoic acid in a water bath at 45° C., the mass ratio of n-eicosane to decanoic acid is 2:5, and cooling to room temperature to obtain a binary composite core material; S12. The binary composite core material is added to an aqueous solution containing Span 80, heated in a water bath to 90°C, and emulsified to obtain an emulsion having a concentration of 8.5wt%; S13. Methyl methacrylate, azobisisobutyronitrile and ethylene glycol dimethacrylate are added to the emulsion in sequence. The mass ratio of methyl methacrylate, ethylene glycol dimethacrylate and azobisisobutyronitrile in the binary composite core material of the reaction system is 14:14:1.2:0.4. The reaction is polymerized for 4 hours while stirring at a rate of 1080 r / min to obtain binary phase change microcapsules. Table 1 Diameter of the phase change microcapsules prepared in Examples 1-4 Phase change microcapsule diameter um Example 1 2.9 Example 2 2.1 Example 3 2.7 Example 4 2.5 Example 5 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains temperature-sensitive fibers, the temperature-sensitive fibers are skin-core structure fibers, and the cross-section of the skin-core structure fibers is a circular cross-section, the skin layer fibers in the skin-core structure fibers contain temperature-sensitive expansion phase change microcapsules, and the hardness of the core layer is greater than that of the skin layer; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 10 wt%, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of nano-alumina ceramic particles in the spinning solution was 20 wt%, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 10 wt%, and the thermosensitive expandable phase change microcapsules were added to the spinning solution and stirred to mix evenly. The content of the thermosensitive expandable phase change microcapsules prepared in Example 1 in the spinning solution was 10 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 94.6%, and one side of the fabric is subjected to hydrophobic finishing to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Example 6 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains a thermosensitive fiber, the thermosensitive fiber is a skin-core structure fiber, and the cross section of the skin-core structure fiber is a circular cross section, the skin layer fiber of the skin-core structure fiber contains a thermosensitive expansion phase change microcapsule, and the hardness of the core layer is greater than the hardness of the skin layer; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 12 wt%, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of nano-silica ceramic particles in the spinning solution was 10 wt%, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 10 wt%, and the thermosensitive expandable phase change microcapsules were added to the spinning solution and stirred to mix evenly. The content of the thermosensitive expandable phase change microcapsules prepared in Example 2 in the spinning solution was 15 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 96.4%, and one side of the fabric is subjected to hydrophobic finishing to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Example 7 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains a thermosensitive fiber, the thermosensitive fiber is a skin-core structure fiber, and the cross section of the skin-core structure fiber is a circular cross section, the skin layer fiber of the skin-core structure fiber contains a thermosensitive expansion phase change microcapsule, and the hardness of the core layer is greater than the hardness of the skin layer; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 12.5 wt %, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of nano-titanium dioxide ceramic particles in the spinning solution was 15 wt % to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 15 wt%, and the thermosensitive expandable phase change microcapsules were added to the spinning solution and stirred to mix evenly. The content of the thermosensitive expandable phase change microcapsules prepared in Example 3 in the spinning solution was 20 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 97.2%, and one side of the fabric is subjected to hydrophobic finishing to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Example 8 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains a thermosensitive fiber, the thermosensitive fiber is a skin-core structure fiber, and the cross section of the skin-core structure fiber is a circular cross section, the skin layer fiber of the skin-core structure fiber contains a thermosensitive expansion phase change microcapsule, and the hardness of the core layer is greater than the hardness of the skin layer; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 13 wt %, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of nano-alumina ceramic particles in the spinning solution was 14 wt %, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 12 wt%, and the thermosensitive expandable phase change microcapsules were added to the spinning solution and stirred to mix evenly. The content of the thermosensitive expandable phase change microcapsules prepared in Example 4 in the spinning solution was 18 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 95.8%, and one side of the fabric is subjected to hydrophobic finishing to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Comparative Example 1 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains a thermosensitive fiber, the thermosensitive fiber is a skin-core structure fiber, and the cross section of the skin-core structure fiber is a circular cross section, the skin layer fiber of the skin-core structure fiber contains a thermosensitive expansion phase change microcapsule, and the hardness of the core layer is greater than the hardness of the skin layer; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 13 wt %, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of nano-silica ceramic particles in the spinning solution was 14 wt %, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 12 wt%, and the thermosensitive expandable phase change microcapsules were added to the spinning solution and stirred to mix evenly. The content of the thermosensitive expandable phase change microcapsules prepared in Example 1 in the spinning solution was 5 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 95.8%, and one side of the fabric is subjected to hydrophobic finishing to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Comparative Example 2 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains a thermosensitive fiber, the thermosensitive fiber is a skin-core structure fiber, and the cross section of the skin-core structure fiber is a circular cross section, the skin layer fiber of the skin-core structure fiber contains a thermosensitive expansion phase change microcapsule, and the hardness of the core layer is greater than the hardness of the skin layer; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 13 wt %, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of nano-silica ceramic particles in the spinning solution was 14 wt %, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 12 wt%, and the thermosensitive expandable phase change microcapsules were added to the spinning solution and stirred to mix evenly. The content of the thermosensitive expandable phase change microcapsules prepared in Example 4 in the spinning solution was 18 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 88.6%, and one side of the fabric is subjected to hydrophobic finishing to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Comparative Example 3 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains temperature-sensitive fibers, the temperature-sensitive fibers are core-skin structure fibers, and the cross-section of the core-skin structure fibers is a circular cross-section, and the skin fibers in the core-skin structure fibers contain temperature-sensitive expansion phase change microcapsules; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: Dissolving polyacrylonitrile in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 13 wt % to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 12 wt%, and the thermosensitive expandable phase change microcapsules were added to the spinning solution and stirred to mix evenly. The content of the thermosensitive expandable phase change microcapsules prepared in Example 4 in the spinning solution was 18 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 94.5%, and one side of the fabric is subjected to hydrophobic finishing to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports. Comparative Example 4 A dynamic moisture absorption and perspiration fabric for outdoor sports, the fabric is a woven fabric, the yarn of the fabric contains a thermosensitive fiber, the thermosensitive fiber is a skin-core structure fiber, and the cross section of the skin-core structure fiber is a circular cross section, the skin layer fiber of the skin-core structure fiber contains a thermosensitive expansion phase change microcapsule, and the hardness of the core layer is greater than the hardness of the skin layer; The above-mentioned method for preparing the dynamic moisture absorption and perspiration wicking fabric for outdoor sports comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 13 wt %, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of nano-alumina ceramic particles in the spinning solution was 14 wt %, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 12 wt%, and the thermosensitive expansion phase change microcapsules were added to the spinning solution and stirred to mix evenly, the content of the thermosensitive expansion phase change microcapsules in the spinning solution was 18 wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber was woven to obtain a woven fabric, the fabric coverage of the woven fabric was 96.2%, and one side of the fabric was hydrophobic finished to obtain a dynamic moisture wicking fabric for outdoor sports; The preparation method of the thermosensitive expansion phase change microcapsules comprises the following steps: S11. After stirring and mixing n-eicosane and decanoic acid in a water bath at 45° C., the mass ratio of n-eicosane to decanoic acid is 2:5, and cooling to room temperature to obtain a binary composite core material; S12. The binary composite core material is added to an aqueous solution containing Span 80, heated in a water bath to 90°C, and emulsified to obtain an emulsion having a concentration of 8.5wt%; S13. Methyl methacrylate, azobisisobutyronitrile and ethylene glycol dimethacrylate are added to the emulsion in sequence. The mass ratio of methyl methacrylate, ethylene glycol dimethacrylate and azobisisobutyronitrile in the binary composite core of the reaction system is 14:14:1.2:0.4. The reaction is polymerized for 4 hours while stirring at a rate of 3500 r / min to obtain binary phase change microcapsules with a particle size of 335 nm. Table 2 Distribution of the core-skin layer of the thermosensitive fiber with core-skin structure prepared in Examples 5-8 and Comparative Examples 1-4 The fabrics prepared in Examples 5-8 and Comparative Examples 1-4 were subjected to performance tests and moisture permeability measurements: According to GB / T12704.2-2009 "Test method for moisture permeability of textile fabrics Part 2: Evaporation method", the moisture permeability of the fabric was measured using the positive cup method, and two test temperatures were set, one test temperature was (25±2)°C, relative humidity was (50±2)%; the other test temperature was (38±2)°C, relative humidity was (50±2)%. Table 3 shows the moisture permeability of fabrics prepared in Examples 5-8 and Comparative Examples 1-4 <![CDATA[Water vapor transmission rate at 25℃ g / (m 2 ·h)]]> <![CDATA[Water vapor transmission rate at 38°C, g / (m 2 ·h)]]> Example 5 145.6 205.6 Example 6 143.1 209.3 Example 7 145.2 202.8 Example 8 144.4 205.6 Comparative Example 1 145.3 156.4 Comparative Example 2 152.3 162.9 Comparative Example 3 142.9 145.7 Comparative Example 4 143.7 149.5 It can be seen from Table 3 that the fabric prepared by the present invention has the characteristic of temperature response, and its moisture absorption and perspiration elimination effect at room temperature is average, but when tested at a temperature close to the body temperature of the human body during exercise, its moisture permeability effect is better. 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 dynamic moisture wicking fabric for outdoor sports, characterized in that: The fabric is a woven fabric, the yarn of the fabric contains thermosensitive fibers, the thermosensitive fibers are skin-core structure fibers, and the cross-section of the skin-core structure fibers is a circular cross-section. The skin fibers in the skin-core structure fibers contain thermosensitive expansion phase change microcapsules, and the hardness of the core layer is greater than that of the skin layer.

2. The method for preparing a dynamic moisture wicking fabric for outdoor sports according to claim 1, characterized in that: The preparation method of the fabric comprises the following steps: S1. Preparation of a core spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 10-15wt%, nano-ceramic particles were added to the spinning solution and stirred to mix evenly, the content of the nano-ceramic particles in the spinning solution was 10-20wt%, to obtain a core spinning solution; S2. Preparation of cortical spinning solution: polyacrylonitrile was dissolved in an aqueous solution of NaSCN to obtain a spinning solution having a concentration of 10-15wt%, and the thermosensitive expansion phase change microcapsules were added to the spinning solution and stirred to mix evenly, the content of the thermosensitive expansion phase change microcapsules in the spinning solution was 10-20wt%, to obtain a cortical spinning solution; S3. Preparation of thermosensitive fiber: After the spinning solution prepared in steps S1 and S2 is allowed to stand for degassing, wet spinning is performed using a coaxial double nozzle to obtain a thermosensitive fiber having a skin-core structure; S4. Fabric preparation: The thermosensitive fiber is weaved to obtain a woven fabric, the fabric coverage of the woven fabric is 94-98%, and one side of the fabric is hydrophobically finished to obtain a dynamic moisture absorption and perspiration fabric for outdoor sports.

3. The method for preparing a dynamic moisture wicking fabric for outdoor sports according to claim 2, characterized in that: The preparation method of the thermosensitive expansion phase change microcapsule comprises the following steps: S11. Stir and mix n-eicosane and decanoic acid in a water bath at 40-45° C., and then cool to room temperature to obtain a binary composite core material; S12. The binary composite core material is added to an aqueous solution containing Span 80, heated in a water bath to 80-90°C, and emulsified to obtain an emulsion; S13. Add methyl methacrylate, azobisisobutyronitrile and ethylene glycol dimethacrylate to the emulsion in sequence, and polymerize for 2-6 hours while stirring to obtain binary phase change microcapsules.

4. The method for preparing a dynamic moisture wicking fabric for outdoor sports according to claim 3, characterized in that: In step S11, the mass ratio of n-eicosane to decanoic acid is 1-5:

10.

5. The method for preparing a dynamic moisture wicking fabric for outdoor sports according to claim 3, characterized in that: The mass ratio of the binary composite core material, methyl methacrylate, ethylene glycol dimethacrylate and azobisisobutylcyanide is 10-15:10-15:0.8-1.5:0.2-0.

5.

6. The method for preparing a dynamic moisture wicking fabric for outdoor sports according to claim 3, characterized in that: The stirring rate in step S13 is 800-1200 r / min.

7. The method for preparing a dynamic moisture wicking fabric for outdoor sports according to claim 2, characterized in that: The nano ceramic particles include any one or more of nano alumina, nano silicon dioxide, nano titanium dioxide or nano zirconium oxide.

8. The dynamic moisture wicking fabric for outdoor sports according to claim 1, characterized in that: The diameter of the core-skin structure fiber is 18-25um, and the thickness of the skin layer is 5-7um.

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