Humidity-responsive compression fabric and preparation method and application thereof

Abstract

The application discloses a humidity-responsive compression fabric and a preparation method and application thereof. The fabric is knitted by graphene composite nylon fibers with a skin-core structure and spandex. The graphene composite nylon fibers have reversible volume changes when the body surface humidity increases, so that the local tension of the fabric is adjusted with the humidity changes. By setting high-response compression zones and low-response breathable zones on different body parts, and by adjusting the amount and structure of the graphene composite fibers with the skin-core structure, the zones can be compressed and the comfort of breathability can be considered. Under the conditions of the embodiments, the volume expansion rate of the fibers in an 80%RH environment is 10%-20%, and the volume expansion rate of the fibers in a 50%RH environment is 2%-8%. The method can be prepared based on the traditional chemical fiber spinning and knitting process, and is suitable for sports compression clothes, arm protectors, leg protectors and pressure socks and other wearable products.

Description

Technical Field

[0001] This invention belongs to the field of clothing and textiles, specifically relating to a humidity-responsive compression fabric, its preparation method, and its application. Background Technology

[0002] Compression clothing is a new type of clothing. By controlling the textile materials, textile structure, and textile process, the clothing applies controllable physical pressure to the surface of the human body to achieve effects such as promoting blood circulation, supporting muscles, relieving fatigue, and improving athletic performance. It is currently widely used in sports compression clothing, medical compression stockings, and other applications.

[0003] Most compression garments on the market today use high-elasticity fibers (such as spandex) and synthetic fibers like nylon and polyester through specific weaving processes to achieve static, fixed compression force. However, traditional compression garment designs have significant limitations: First, the compression force they provide is constant and cannot respond to the dynamic changes in the body's physiological state during exercise. For example, when the intensity of exercise increases and sweating increases, muscles require stronger support and protection, but the compression force of traditional compression garments does not increase accordingly, failing to provide "on-demand" intelligent compression. Second, in sweaty and humid environments, traditional compression fabrics tend to stick to the skin due to sweat absorption, leading not only to decreased comfort and a feeling of stuffiness and constriction, but also potentially affecting blood circulation due to uneven distribution of compression force, contradicting the original design intent of compression garments. Although a large mesh structure can improve perspiration efficiency, the compression force is also significantly weakened under this structure, failing to produce significant effects.

[0004] In recent years, although some research has attempted to develop smart responsive materials, such as thermosensitive hydrogels and shape memory polymers, these materials often suffer from problems such as slow response speed, poor mechanical properties, poor compatibility with textile processing technologies, or high manufacturing costs, making it difficult to achieve industrial application. Therefore, the textile and apparel industry urgently needs a smart compression fabric that can respond to changes in the human body's physiological state, dynamically adjust compression force, and also provide good wearing comfort. Summary of the Invention

[0005] To address the problem that the compression force of existing compression garments is difficult to adjust to changes in skin humidity, this invention proposes a humidity-responsive compression fabric, its preparation method, and its applications. The moisture-expanding graphene microspheres used in this invention possess a paper-like structure and an oxygen-grade gradient structure, exhibiting reversible moisture absorption and expansion capabilities in humid environments. Simultaneously, through a core-sheath structure spinning technique, the humidity-responsive component is confined to the sheath layer, giving the fiber humidity responsiveness, while the core layer of nylon maintains the basic mechanical properties.

[0006] The fabric can adjust local tension according to changes in the wearer's skin humidity, exhibiting characteristics of enhanced wet compression and dry recovery under the conditions of the embodiment.

[0007] One of the technical solutions of the present invention is to provide a humidity-responsive compression fabric, which is woven from graphene composite fibers with a core-sheath structure and spandex. The sheath of the composite fiber is nylon fiber containing moisture-expanding graphene microspheres, and the core layer is pure nylon fiber. The moisture-expanding graphene microspheres have a loose, paper-like structure with a particle size of 2 to 10 micrometers, an oxygen content of 2% to 5% on the outer surface, and an oxygen content of 40% to 50% inside.

[0008] When ambient humidity rises, the graphene composite fibers in the fabric expand in volume, leading to an increase in overall fabric tension and achieving localized compression. The unique internal and external oxygen-containing components and loose, porous, paper-like structure of the moisture-expanding graphene microspheres enable a reversible cycle of moisture expansion and drying recovery. Moisture from the environment can penetrate into the microspheres through microchannels on their surface, where it is adsorbed by oxygen-containing groups such as hydroxyl and carboxyl groups on the graphene oxide, causing swelling. The loose, paper-like structure inside provides space for the expansion of the sheets. As humidity increases, the internal expansion pressure accumulates and eventually breaks through the constraint of the low-oxygen "shell," macroscopically manifesting as a significant increase in the volume of the microspheres. During the drying process, the internal moisture is gradually removed from the microchannels. The elastic recovery force of the sheets themselves, as well as the residual van der Waals forces and π-π interactions between the sheets, act like a compressed spring, driving the sheets to shrink back, macroscopically manifesting as the microspheres shrinking back to their initial structure.

[0009] Furthermore, the preparation method of the moisture-expanded graphene microspheres is as follows: an aqueous dispersion of graphene oxide is prepared using the Hummers method, ammonia is added to adjust the pH to 8-10, then H2O2 is added, and the mixture is stirred at 35-50℃ for 5-20 minutes, followed by spray drying to obtain moisture-expanded graphene microspheres. Through the reaction with H2O2, the overall oxygen content of the graphene oxide increases. During spray drying, the removal of moisture spontaneously forms a wrinkled, paper-like structure. The graphene on the outer surface is deoxygenated due to contact with high temperature, while the graphene on the inner surface, at a relatively lower temperature, retains most of the oxygen-containing groups, thus forming a unique structure with an outer surface oxygen content of 2%-5% and an inner oxygen content of 40%-50%.

[0010] Furthermore, the mass percentage of moisture-expanding graphene microspheres in the sheath of the graphene composite fiber with a core-sheath structure is 1%–5%. By adjusting the addition ratio of graphene microspheres (1%–5%), the volume expansion rate of the fiber under different humidity levels can be controlled. If the addition amount is lower than this ratio, the fiber expansion is not significant and is no different from conventional fibers. However, if the ratio is too high, the overall spinnability of the fiber decreases, and problems such as roughness and cracking appear on the fiber surface, making it difficult to use in clothing fabrics.

[0011] Furthermore, at room temperature, the volume expansion rate of the core-sheath structure graphene composite fiber is 10%–20% in an environment with a relative humidity of 80%; and 2%–8% in an environment with a relative humidity of 50%.

[0012] Furthermore, the humidity-responsive compression fabric includes a high-response compression zone and a low-response breathable zone. The high-response compression zone uses a rib knit or tightly knit structure, while the low-response breathable zone uses a mesh structure. Compression sportswear can be regionalized structurally designed according to the distribution of muscle stress and moisture release in the human body to obtain distributed pressure and moisture release channels.

[0013] Furthermore, the fabric employs core-sheath fibers with varying graphene content in different regions to create a compression gradient. Additionally, a blending process can be used during weaving to control the proportion of core-sheath graphene composite fibers in the fabric, thereby achieving compression gradient control.

[0014] The second technical solution of the present invention is to provide a method for preparing the above-mentioned humidity-responsive compression fabric, comprising the following steps: (1) Preparation of moisture-expanded graphene microspheres: Aqueous dispersion of graphene oxide was prepared by Hummers method, and ammonia was added to adjust the pH to 8-10. Then H2O2 was added and stirred at 35-50℃ for 5-20 min. The mixture was then spray-dried to obtain moisture-expanded graphene microspheres. (2) Preparation of graphene-PA6 masterbatch: Place moisture-expanded graphene microspheres in an oven and keep them at 270~300℃ for 10~30min. Then mix them with PA6 slices at a mass ratio of 1~5:100 and granulate them by twin-screw extrusion to obtain graphene-PA6 masterbatch. (3) Preparation of core-shell structure graphene composite fiber: Graphene-PA6 masterbatch is placed in the skin masterbatch chamber, PA6 slices are placed in the core slice chamber, heated and melted, and then spun through the core-shell structure spinneret. After passing through the bellows and winding, POY is obtained. Finally, the core-shell structure graphene composite fiber is obtained after texturing. (4) Preparation of humidity-responsive adaptive compression fabric: The fabric is woven from graphene composite fiber with core-sheath structure and spandex to obtain humidity-responsive adaptive compression fabric.

[0015] Furthermore, the mass ratio of H2O2 to graphene oxide in step (1) is 0.5~5:1. Hydrogen peroxide can further react with the carbon atoms on the surface of graphene oxide, increasing the overall oxygen content of graphene oxide.

[0016] Furthermore, the relationship between the maximum spray drying temperature T (°C) and the powder residence time t (s) in step (1) is t = 30 - (T - 100) / 5, and T ≤ 180°C. Rapid evaporation of water must be ensured during spray drying to avoid excessive removal of groups from graphene oxide. Therefore, it is necessary to adjust the optimal drying temperature and residence time. Shorter residence times are required at high temperatures, while relatively longer residence times can be achieved at lower temperatures. However, the maximum temperature must not exceed 180°C to avoid excessive removal of oxygen-containing groups.

[0017] The third technical solution of the present invention is to provide the application of the above-mentioned humidity-responsive compression fabric.

[0018] The beneficial effects of this invention are as follows: By introducing moisture-expanding graphene microspheres into the fiber sheath, the microspheres absorb moisture and expand when the ambient humidity rises, causing a volume change in the core-sheath structure fibers and thus increasing the local tension of the fabric. Example tests show that the volume expansion rate of the core-sheath structure graphene composite fiber is 10%–20% in an 80% RH environment and 2%–8% in a 50% RH environment. This allows compression clothing to automatically increase local compression force when the user sweats, providing stronger protection when muscles need the most support, achieving a leap from "static compression" to "dynamic intelligent compression." A double-blind randomized crossover trial found that, compared to wearing control clothing, subjects wearing the aforementioned humidity-responsive compression fabric experienced a significant increase in exercise duration of 39.1 seconds and a decrease in maximum heart rate of 1.8 beats / minute, effectively improving exercise performance.

[0019] The fabric of this invention enhances compression in the humidity-responsive zone (high-response compression zone) while ensuring effective moisture and heat dissipation through the design of a low-response breathable zone. This zoned design enhances the fabric's functionality while simultaneously improving overall wearing comfort, effectively preventing stuffiness and excessive restriction.

[0020] Graphene components can provide fabrics with additional functions such as far-infrared emission and antibacterial and deodorizing properties, making them particularly suitable for outdoor sports, marathon, and other sportswear applications.

[0021] The core-sheath graphene composite fiber of this invention can be flexibly applied. On the one hand, core-sheath fibers with different graphene contents can be used to adjust the compression force; on the other hand, a blending process can be used to control the proportion of core-sheath graphene composite fibers in the fabric. Furthermore, the fabric structure can be designed to fully utilize its moisture absorption and expansion properties, resulting in a wide range of applications. Attached Figure Description

[0022] Figure 1 Photograph of the appearance of the compression suit obtained in Example 1.

[0023] Figure 2 SEM image of the moisture-expanded graphene microspheres obtained in Example 1.

[0024] Figure 3 Comparison of the exhaustion time test data after wearing the compression suit during exercise obtained in Comparative Example 1 and Example 1.

[0025] Figure 4 Comparison of maximum heart rate after exercise in the compression suits obtained in Comparative Example 1 and Example 1.

[0026] Figure 5 Comparison of maximum oxygen uptake (VO2max) after exercise in compression suits obtained in Comparative Example 1 and Example 1. Detailed Implementation

[0027] The following examples are provided to further illustrate the present invention and are intended to explain the invention, not to limit its scope. Unless otherwise specified, all figures are expressed in parts by weight and weight percentages.

[0028] Unless otherwise specified, the raw materials used in this invention are all conventional commercially available products; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0029] The embodiments of the present invention will be further described below with reference to several examples.

[0030] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0031] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0032] If motion test data is used to illustrate the technical effect, it should be conducted under the same test plan, using the same size control clothing, the same test procedure, and the same statistical method; the human motion test results in the instruction manual are only used to illustrate the effect trend under the conditions of the embodiments.

[0033] Fabric humidity response pressure test: Place the fabric or garment sample on a standard limb mold and arrange a flexible pressure sensor between the mold and the fabric; after the sample is equilibrated under 50%RH and 80%RH conditions, the contact pressure is collected. At least 3 measuring points are set in each area, and no less than 3 samples are in each group.

[0034] Fiber volume expansion rate test: Place the fiber samples in an environment with a set relative humidity of 25±2℃ for 2 hours to equilibrate, and measure the volume change rate of the fibers before and after treatment; each group should have no less than 5 samples, and the average value of the results should be taken. The volume expansion rate is calculated as (V wet state - V dry state) / V dry state × 100%.

[0035] The particle size and morphology of the moisture-expanded graphene microspheres were observed using scanning electron microscopy. Particle size was statistically analyzed using acetone as solvent and measured by a laser particle size analyzer. The oxygen atom content on the outer surface was measured using XPS, and the oxygen atom content inside was measured using cross-sectional samples or XPS / EDS after ion etching. The results were taken as the average value of multiple test areas.

[0036] The exhaustion test was conducted using an incremental load treadmill, with the following procedure: (1) Warm-up: run at 6 km / h for 2 minutes; (2) Speed ​​increment phase: increase speed by 1 km / h every 1.5 minutes; (3) Incline increment phase: after reaching 10 km / h, the incline was increased by 1% every 1.5 minutes (from 1% to 5%); (4) Test endpoint: the subject reached voluntary exhaustion (unable to maintain the set speed). All tests were conducted under the same environmental conditions (temperature 22°C, relative humidity 50%), and the time to exhaustion was recorded. After exhaustion, the maximum heart rate and maximum oxygen uptake (VO2max) were measured.

[0037] Example 1 (1) Preparation of moisture-expanded graphene microspheres: Aqueous dispersion of graphene oxide was prepared by Hummers method, and ammonia was added to adjust the pH to 8. Then H2O2 was added and stirred at 35℃ for 20 min. The mass ratio of H2O2 to graphene oxide was 1:1. Spray drying was performed to obtain moisture-expanded graphene microspheres with a particle size of 2~5 micrometers. The highest spray drying temperature was 150℃ and the residence time was 20s. (2) Graphene-PA6 masterbatch: Moisture-expanded graphene microspheres were placed in an oven and kept at 270°C for 30 min. Then they were mixed with PA6 slices at a mass ratio of 1:100 and granulated by twin-screw extrusion to obtain graphene-PA6 masterbatch. (3) Preparation of core-shell structure graphene composite fiber: Graphene-PA6 masterbatch is placed in the skin masterbatch hopper, PA6 slices are placed in the core slice hopper, heated and melted, and then spun through the core-shell structure spinneret. After passing through the bellows and winding, POY is obtained. Finally, after texturing, core-shell structure graphene composite fiber 1 is obtained. (4) Preparation of humidity-responsive adaptive compression fabric: The fabric is woven using core-sheath graphene composite fiber and spandex as raw materials. The mass ratio of core-sheath graphene composite fiber and spandex is 9:1 to obtain humidity-responsive adaptive compression fabric. Tight rib structure is used in the biceps and quadriceps areas to achieve stronger local compression force under moisture. Mesh structure is used in the joints and armpits to ensure high breathability. The fabric is then processed into sports compression garment.

[0038] The volume expansion rate of the obtained core-sheath structure graphene composite fiber 1 after equilibration in an 80%RH environment for 2 hours was 11%, and the volume expansion rate after equilibration in a 50%RH environment for 2 hours was 3%. The biceps brachii area fabric can generate pressures of 26.2 mmHg and 17.9 mmHg respectively after equilibration in 80%RH and 50%RH environments for 2 hours. Figure 1 The photos of the resulting compression garment show that its appearance is basically similar to that of compression garments woven from conventional PA6 fibers. Figure 2 The image shows a SEM image of moisture-expanded graphene microspheres, revealing a paper-like structure formed by the shrinkage and dehydration of graphene oxide sheets. Figure 3 The results of the exercise exhaustion test after wearing the compression garment obtained in this embodiment show that the exhaustion time of the compression garment containing graphene composite fiber fabric is 39.1 seconds longer than that of the compression garment made of conventional nylon (Comparative Example 1). Figure 4 The maximum heart rate after wearing the compression garment obtained in this embodiment is 196.4 beats / minute. Under the test conditions of this embodiment, the maximum heart rate of the subject wearing the compression garment obtained in embodiment 1 is 196.4 beats / minute, which is 1.8 beats / minute less than that of the control group. Figure 5 The maximum oxygen uptake (VO2max) after wearing the compression garment obtained in this embodiment is 45.3 mL / min / kg, which is 1.2 mL / min / kg less than that of Comparative Example 1.

[0039] Example 2 (1) Preparation of moisture-expanded graphene microspheres: Aqueous dispersion of graphene oxide was prepared by Hummers method, and ammonia was added to adjust the pH to 8. Then H2O2 was added and stirred at 35℃ for 20 min. The mass ratio of H2O2 to graphene oxide was 1:1. Spray drying was performed to obtain moisture-expanded graphene microspheres with a particle size of 7~10 micrometers. The highest spray drying temperature was 150℃ and the residence time was 20s. (2) Graphene-PA6 masterbatch: Moisture-expanded graphene microspheres were placed in an oven and kept at 280°C for 20 min. Then they were mixed with PA6 slices at a mass ratio of 2:100 and granulated by twin-screw extrusion to obtain graphene-PA6 masterbatch. (3) Preparation of core-shell structure graphene composite fiber: Graphene-PA6 masterbatch is placed in the skin masterbatch hopper, PA6 slices are placed in the core slice hopper, heated and melted, and then spun through the core-shell structure spinneret. After passing through the bellows and winding, POY is obtained. Finally, after texturing, core-shell structure graphene composite fiber 2 is obtained. (4) Preparation of humidity-responsive adaptive compression fabric: The fabric is woven from graphene composite fiber with core-sheath structure and spandex to obtain humidity-responsive adaptive compression fabric.

[0040] The resulting core-sheath graphene composite fiber 2 exhibits a volume expansion rate of 14% at 80% RH and 5% at 50% RH. After being woven into a fabric with the same rib structure as in Example 1, it generates pressures of 29.8 mmHg and 21.3 mmHg respectively after equilibration in 80% RH and 50% RH environments for 2 hours.

[0041] Example 3 (1) Preparation of moisture-expanded graphene microspheres: Aqueous dispersion of graphene oxide was prepared by Hummers method, and ammonia was added to adjust the pH to 10. Then H2O2 was added and stirred at 50℃ for 5 min. The mass ratio of H2O2 to graphene oxide was 0.5:1. Spray drying was performed to obtain moisture-expanded graphene microspheres with a particle size of 2~5 micrometers. The highest spray drying temperature was 180℃ and the residence time was 14s. (2) Graphene-PA6 masterbatch: Moisture-expanded graphene microspheres were placed in an oven and kept at 300°C for 10 min. Then they were mixed with PA6 slices at a mass ratio of 5:100 and granulated by twin-screw extrusion to obtain graphene-PA6 masterbatch. (3) Preparation of core-shell structure graphene composite fiber: Graphene-PA6 masterbatch is placed in the skin masterbatch hopper, PA6 slices are placed in the core slice hopper, heated and melted, and then spun through the core-shell structure spinneret. After passing through the bellows and winding, POY is obtained. Finally, after texturing, core-shell structure graphene composite fiber 3 is obtained. (4) Preparation of humidity-responsive adaptive compression fabric: The fabric is woven from graphene composite fiber with core-sheath structure and spandex to obtain humidity-responsive adaptive compression fabric.

[0042] The resulting core-sheath graphene composite fiber 3 exhibits a volume expansion rate of 20% at 80% RH and 8% at 50% RH. After being woven into a fabric with the same rib structure as in Example 1, it generates pressures of 33.4 mmHg and 25.6 mmHg respectively after equilibration in 80% RH and 50% RH environments for 2 hours.

[0043] Example 4 (1) Preparation of moisture-expanded graphene microspheres: Aqueous dispersion of graphene oxide was prepared by Hummers method, and ammonia was added to adjust the pH to 10. Then H2O2 was added and stirred at 35℃ for 20 min. The mass ratio of H2O2 to graphene oxide was 5:1. Spray drying was performed to obtain moisture-expanded graphene microspheres with a particle size of 2~5 micrometers. The highest spray drying temperature was 130℃ and the residence time was 24s. (2) Graphene-PA6 masterbatch: Moisture-expanded graphene microspheres were placed in an oven and kept at 270°C for 30 min. Then they were mixed with PA6 slices at a mass ratio of 1:100 and granulated by twin-screw extrusion to obtain graphene-PA6 masterbatch. (3) Preparation of core-shell structure graphene composite fiber: Graphene-PA6 masterbatch is placed in the skin masterbatch hopper, PA6 slices are placed in the core slice hopper, heated and melted, and then spun through the core-shell structure spinneret. After passing through the bellows and winding, POY is obtained. Finally, after texturing, core-shell structure graphene composite fiber 4 is obtained. (4) Preparation of humidity-responsive adaptive compression fabric: The fabric is woven from graphene composite fiber with core-sheath structure and spandex to obtain humidity-responsive adaptive compression fabric.

[0044] The obtained core-sheath structure graphene composite fiber exhibits a volume expansion rate of 10% at 80% humidity and 2% at 50% humidity. After being woven into a fabric with the same rib structure as in Example 1, it can generate pressures of 24.2 mmHg and 15 mmHg respectively after equilibration in 80%RH and 50%RH environments for 2 hours.

[0045] Example 5 The graphene composite fibers 1-3 with a core-sheath structure obtained in Examples 1-3 were used for zoned weaving. Graphene composite fiber 3 was used in the distal forearm, graphene composite fiber 2 was used in the biceps / triceps area of ​​the upper arm, mesh fabric was used in the joints and axillary regions, and graphene composite fiber 1 was used in the remaining areas to maintain basic compression. Using fibers with different graphene contents in different areas allows for the pre-design of compression gradients. Under the test conditions of the examples, exercise duration increased by 32.7 seconds, maximum heart rate decreased by 1.5 beats / minute, and maximum oxygen uptake decreased by 1.1 mL / min / kg.

[0046] Comparative Example 1 The fabric is woven using conventional PA6 fiber and spandex as raw materials, with a PA6 fiber to spandex mass ratio of 9:1. A weft-knitted jacquard structure is used to create the compression garment. Tight rib knit is used in the biceps and quadriceps areas, while mesh knit is used in the joints and armpits. After being woven with the same rib structure as in Example 1, the fabric generated pressures of 9.3 mmHg and 8.8 mmHg respectively after equilibration for 2 hours in 80%RH and 50%RH environments, essentially matching the pressure at 30%RH.

[0047] The above embodiments detail the structure, features, and effects of the present invention. The above descriptions are merely preferred embodiments of the present invention. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent variations, that do not exceed the scope covered by the specification, should be within the protection scope of the present invention.

Claims

1. A humidity-responsive compression fabric, characterized in that, It is woven from graphene composite fibers with a core-sheath structure and spandex. The outer layer of the composite fiber is nylon fiber containing moisture-expanded graphene microspheres, and the core layer is nylon fiber. The moisture-expanded graphene microspheres have a loose, paper-like structure with a particle size of 2-10 micrometers, an oxygen atom content of 2%-5% on the outer surface, and an oxygen atom content of 40%-50% on the inside. The mass percentage of moisture-expanded graphene microspheres in the outer layer of the graphene composite fiber with a core-sheath structure is 1%-5%.

2. The humidity-responsive compression fabric according to claim 1, characterized in that, The method for preparing the moisture-expanded graphene microspheres is as follows: an aqueous dispersion of graphene oxide is prepared using the Hummers method, ammonia is added to adjust the pH to 8-10, then H2O2 is added, and the mixture is stirred at 35-50℃ for 5-20 min, followed by spray drying to obtain moisture-expanded graphene microspheres; wherein the mass ratio of H2O2 to graphene oxide is 0.5-5:1, and the spray drying temperature is 130-180℃.

3. The humidity-responsive compression fabric according to claim 1, characterized in that, Under conditions of 25±2℃, the volume expansion rate of the core-sheath structure graphene composite fiber after equilibration for 2 hours in an environment with a relative humidity of 80% is 10% to 20%; and the volume expansion rate after equilibration for 2 hours in an environment with a relative humidity of 50% is 2% to 8%.

4. The humidity-responsive compression fabric according to claim 1, characterized in that, The humidity-responsive compression fabric includes a high-response compression zone and a low-response breathable zone; the high-response compression zone uses a rib knit or a tightly knitted structure, and the low-response breathable zone uses a mesh knit.

5. A method for preparing a humidity-responsive compression fabric as described in claim 1, characterized in that, It includes the following steps: (1) Preparation of moisture-expanded graphene microspheres: Aqueous dispersion of graphene oxide was prepared by Hummers method, and ammonia was added to adjust the pH to 8-10. Then H2O2 was added and stirred at 35-50℃ for 5-20 min. The mixture was then spray-dried to obtain moisture-expanded graphene microspheres. (2) Preparation of graphene-PA6 masterbatch: Place moisture-expanded graphene microspheres in an oven and keep them at 270~300℃ for 10~30min. Then mix them with PA6 slices at a mass ratio of 1~5:100 and granulate them by twin-screw extrusion to obtain graphene-PA6 masterbatch. (3) Preparation of core-shell structure graphene composite fiber: Graphene-PA6 masterbatch is placed in the skin masterbatch chamber, PA6 slices are placed in the core slice chamber, heated and melted, and then spun through the core-shell structure spinneret. After passing through the bellows and winding, POY is obtained. Finally, the core-shell structure graphene composite fiber is obtained after texturing. (4) Preparation of humidity-responsive adaptive compression fabric: The fabric is woven from graphene composite fiber with core-sheath structure and spandex to obtain humidity-responsive adaptive compression fabric.

6. The method according to claim 5, characterized in that, The mass ratio of H2O2 to graphene oxide in step (1) is 0.5~5:

1.

7. The method according to claim 5, characterized in that, The spray drying temperature in step (1) is 130-180℃, and the residence time of the powder in the drying zone is 14-24s.

8. The application of the humidity-responsive compression fabric as described in claim 1 in sports compression clothing, arm protectors, leg protectors, compression socks or other close-fitting compression wearables.

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