Fabric with cool feeling function and preparation method thereof

Abstract

The present application relates to a kind of fabrics with cool feeling function and its preparation method, the fabric includes base cloth and the nano graphene film layer deposited on the surface of base cloth;Fabric also includes modified hollow microsphere layer, modified hollow microsphere layer is between base cloth and nano graphene film layer, modified hollow microsphere layer includes several modified hollow microspheres, modified hollow microsphere surface is coated with titanium dioxide, jade powder.The preparation method of the present application is simple and efficient, low cost, high economic benefit, good universality, good controllability and adjustability, the fabric with cool feeling function prepared has the advantages of high heat dissipation, antibacterial, anti-ultraviolet, cool feeling performance.

Description

Technical Field

[0001] This application relates to the field of functional materials technology, and in particular to a fabric with a cooling function and its preparation method. Background Technology

[0002] With rapid societal development, people's consumption concepts are constantly changing. When choosing clothing, in addition to style and color, people tend to consider comfort and functionality. As a result, additional functions of clothing fabrics, such as cooling properties, have emerged and gained favor in the fabric market.

[0003] Currently, the development of fabrics with cooling properties typically involves incorporating cooling substances into a fiber solution, then spinning and weaving the fabric, or using specific weaving combinations to facilitate rapid heat dissipation and achieve a cooling sensation. These methods require process adjustments during the spinning stage to accommodate the cooling substance, limiting their applicability. Other methods utilize cooling auxiliaries, achieved through post-treatment padding; however, these methods often produce only moderate cooling effects.

[0004] For example, existing companies have produced cooling and UV-protective fibers by melt-blending natural jade powder, hydrated mica ore powder, and nylon matte chips. The composite ore powder reduces the heat absorption rate and accelerates the heat dissipation rate of the nylon fiber. When this fiber comes into contact with the skin, it produces a cooling sensation with a temperature difference of 1-2°C, while effectively protecting the human body from excessive ultraviolet radiation, exhibiting reflective, shielding, and absorption functions against ultraviolet rays. However, this preparation method is designed for synthetic fibers, limiting its application.

[0005] For example, cooling polyester fibers can be developed by adding functional masterbatches and changing the cross-sectional structure of fibers; or, collagen peptides can be polymerized with polyamide monomers to create collagen nylon particles that can withstand high-temperature processing, thus developing collagen cooling fabrics that are skin-friendly and gentle on the skin; or, during the polymerization of chemical fiber macromolecules, special elements of living minerals can be embedded to give the fabric a highly efficient, long-lasting, and safe physical antibacterial effect. At the same time, the unique three-dimensional microporous design of the chemical fiber crystal region gives the fiber excellent moisture absorption, perspiration wicking, and quick-drying properties, making it cooler, more breathable, and skin-friendly compared to coated sun protection fabrics.

[0006] The methods described above for preparing cooling fabrics are applicable to chemical fibers such as polyester, nylon, and polypropylene, but are not universally applicable to natural fibers such as cotton.

[0007] Therefore, it is necessary to develop a fabric preparation method that is universally applicable to both chemical and natural fibers, enabling them to achieve a cooling effect.

[0008] Graphene, with its unique physicochemical properties, can be combined with other metals and non-metals to form countless materials with special functions. Fabrics made from graphene materials have high heat dissipation properties, enabling rapid and long-lasting heat dissipation, effectively reducing the wearer's body temperature in hot environments and providing a sustained feeling of low temperature.

[0009] Patent CN108794997B discloses a cooling masterbatch, a cooling fiber, its preparation method, and its uses. The cooling masterbatch includes a substrate, and graphene material and jade powder dispersed in the substrate. The substrate includes any one or a combination of at least two of polyester, nylon, and polypropylene materials. The graphene material includes any one or a combination of at least two of graphene, graphene oxide, and graphene derivatives. This invention simultaneously adds graphene and jade powder to the fiber substrate, which can improve the cooling sensation. Under the same cooling requirements, it can reduce the amount of jade powder added, improving problems such as poor fiber comfort, powdering, and odor caused by excessive jade powder addition. This invention effectively solves the agglomeration problem of graphene material and jade powder by first mixing graphene material and jade powder with the fiber substrate to obtain functional particles, and then mixing the two with blank fiber substrate, improving their dispersibility and making the cooling sensation more uniform. However, the above preparation method is still not applicable to natural fibers.

[0010] CN113652857B discloses a cooling fabric, its preparation method, and its application. The fabric comprises a base fabric and a heat-conducting nanofilm layer. The heat-conducting nanofilm layer is deposited on the surface of the base fabric and includes the following components: silicon carbide or zirconium oxide. When this cooling fabric comes into contact with human skin, the heat generated on the skin's surface can be rapidly transferred from the underside of the fabric in contact with the skin to the surface of the fabric and the heat-conducting nanofilm layer, thereby conducting and dissipating heat from the skin's surface, ultimately allowing the human body to feel a cooling sensation. This cooling fabric does not require the layering of various fabrics or changes in yarn material, avoiding the limitations of fabric product performance, thus achieving the cooling properties of the fabric. The above preparation method is applicable to natural fibers and chemical fibers, possessing universality; however, zirconium oxide and silicon carbide are expensive, resulting in high preparation costs.

[0011] Therefore, if a method for preparing a fabric with a cooling function can be developed that is universally applicable to both chemical and natural fibers, has good cooling properties, and is low in cost, it will be more practical and improve economic efficiency. Summary of the Invention

[0012] In view of the shortcomings of the prior art, the present invention provides a fabric with cooling function and a method for preparing the same, so as to solve the problems of existing cooling fabric preparation methods not being universally applicable to chemical fibers and natural fibers, and the high cost of the preparation methods.

[0013] To achieve the above and related objectives, the present invention adopts the following technical solution:

[0014] The first aspect of the present invention provides a fabric with a cooling function, comprising a base fabric and a nano-graphene film layer deposited on the surface of the base fabric; the fabric further comprises a modified hollow microsphere layer, the modified hollow microsphere layer being located between the base fabric and the nano-graphene film layer, the modified hollow microsphere layer comprising a plurality of modified hollow microspheres, the surface of the modified hollow microspheres being coated with titanium dioxide and jade powder.

[0015] In one embodiment of this application, the base fabric is one of polyester base fabric, nylon base fabric, polypropylene base fabric, pure cotton base fabric, and silk base fabric.

[0016] A second aspect of the present invention provides a method for preparing a fabric with a cooling function, the method comprising:

[0017] (1) Modified hollow microspheres were obtained by coating the surface of hollow microspheres with a thin film of titanium dioxide and jade powder using a hydrothermal method.

[0018] (2) A modified hollow microsphere layer is prepared by coating a number of modified hollow microspheres onto the surface of the base fabric using a coating finishing method.

[0019] (3) Using graphene as the target material and a base fabric coated with the modified hollow microspheres as the substrate, a nano-graphene film is deposited on the surface of the modified hollow microspheres by vacuum deposition to obtain a fabric with cooling function.

[0020] In one embodiment of this application, step (1) includes:

[0021] A. Prepare a jade powder suspension by suspending jade powder in water and heating it; prepare a titanium-containing solution by selecting titanium-containing raw materials; and prepare an ethanol solution.

[0022] B. Add the titanium-containing solution to the jade powder suspension, allow it to settle, and then add the ethanol solution while stirring to obtain the reaction solution;

[0023] C. Add hollow microspheres to the reaction solution, sonicate, add deionized water, and carry out a hydrothermal reaction to obtain modified hollow microspheres.

[0024] In one embodiment of this application, the reaction conditions for step A are selected from at least one of (I) to (III):

[0025] (I) The titanium-containing solution is one of tetraethyl titanate solution, tetramethyl titanate solution, tetrapropyl titanate solution, and tetrabutyl titanate solution;

[0026] (II) The mass ratio of jade powder to titanium-containing raw materials is (2-4):(6-10);

[0027] (III) The volume ratio of the jade powder suspension, the titanium-containing solution, and the ethanol solution is (1-2):(2-5):(4-8).

[0028] In one embodiment of this application, the deposition time in step B is 10 to 30 minutes.

[0029] In one embodiment of this application, the reaction conditions for step C are selected from at least one of (Ⅳ) to (Ⅶ):

[0030] (Ⅳ) The mass ratio of hollow microspheres to titanium-containing raw materials is (1-10):(1-5);

[0031] (V) The volume ratio of the added deionized water to the ethanol solution is (1-1.5):(1-2);

[0032] (VI) The ultrasonic oscillation time is 5 to 10 minutes;

[0033] (VII) The hydrothermal reaction conditions are to raise the temperature to 120-170℃ at a rate of 1-4℃ / min, and then keep the temperature constant for 3-5 hours.

[0034] In one embodiment of this application, the method includes: the thickness ratio of the modified hollow microsphere layer to the nano-graphene film layer is (3-5):(8-12).

[0035] In one embodiment of this application, the base fabric is one of polyester base fabric, nylon base fabric, polypropylene base fabric, pure cotton base fabric, and silk base fabric.

[0036] In one embodiment of this application, the vacuum deposition method is magnetron sputtering.

[0037] The beneficial technical effects of this invention are as follows:

[0038] This application uses a coating finishing method to coat a modified hollow microsphere layer onto the surface of a base fabric, and then uses a vacuum deposition method to deposit a nano-graphene film layer on the base fabric, giving the prepared fabric a sandwich structure to achieve high heat dissipation and rapid, long-lasting heat dissipation, thereby obtaining an excellent cooling effect. The coating finishing method and vacuum deposition method used in this application are applicable to various types of base fabrics, such as base fabrics made from chemical fibers and base fabrics made from natural fibers such as cotton. Since flax has good cooling properties, it can be used as a cooling fiber to prepare fabrics or blended and interwoven with other fibers to prepare cooling fabrics. Therefore, the base fabrics prepared from natural fibers in this application are mainly aimed at cotton base fabrics with poor cooling properties, and silk base fabrics that feel stuffy in high-temperature environments.

[0039] This application uses vacuum deposition to prepare fabrics, which has good controllability and adjustability, produces fabrics with high uniformity, and has a fast preparation speed and high efficiency.

[0040] This application uses a nano-graphene film layer as the surface layer of the fabric. On the one hand, it achieves excellent heat dissipation, thereby achieving the purpose of cooling and a refreshing feeling; on the other hand, nano-graphene has highly efficient spectral antibacterial properties, adding antibacterial function to the fabric; on the other hand, nano-graphene has a good ability to absorb ultraviolet rays, adding anti-ultraviolet function to the fabric; and on the other hand, the price of nano-graphene is lower than that of heat-conducting materials such as nano-zirconia, reducing the production cost of the fabric.

[0041] Traditional methods of incorporating cooling mineral materials such as jade powder onto fibers often involve physical blending and spinning. However, this method is suitable for chemical fibers but has poor adaptability to natural fibers such as cotton. While impregnation methods can be used to apply cooling mineral materials to fabrics made from natural fibers, the bonding strength is poor, failing to achieve lasting cooling properties. Therefore, this application uses hollow microspheres as a carrier, coating jade powder onto the surface of the microspheres, and then applying the coating to the base fabric. The hollow microspheres are grayish-white in appearance and are a loose, free-flowing powder material. They can serve as carriers for chemical adsorbents, catalysts, and gases. The hollow microspheres exhibit good bonding strength to pure cotton and silk fabrics without altering the fabric's inherent properties.

[0042] Since hollow microspheres can undergo surface coating modification, this application uses jade powder and titanium dioxide to coat the surface of hollow microspheres. On the one hand, the hollow microspheres improve the bonding strength between jade powder and the base fabric, on the other hand, the jade powder improves the cooling performance of the fabric, and on the other hand, the titanium dioxide enhances the UV protection and wrinkle resistance of the fabric.

[0043] Meanwhile, since the sputtered film produced by vacuum deposition (magnetron sputtering) has a high bonding strength with chemical fibers but a low bonding strength with natural fibers, this application coats modified hollow microspheres onto the surface of the base fabric to form a modified hollow microsphere layer, which can enhance the bonding strength between the nano-graphene film layer and the base fabric.

[0044] This application utilizes a nano-graphene film layer to provide the primary cooling effect, while a modified hollow microsphere layer provides an auxiliary cooling effect. Furthermore, by controlling the thickness ratio of the nano-graphene film layer to the modified hollow microsphere layer, the fabric's softness is not affected. Simultaneously, the titanium dioxide layer imparts a certain degree of wrinkle resistance to the fabric.

[0045] In summary, the preparation method of this application is simple, efficient, low-cost, economically beneficial, universally applicable, and highly controllable and adjustable. The fabric prepared with cooling function has the advantages of high heat dissipation, antibacterial properties, UV protection, wrinkle resistance, and good cooling performance.

[0046] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0047] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of the invention are merely illustrative and should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of the invention.

[0048] This invention provides a fabric with a cooling function, comprising a base fabric and a nano-graphene film layer deposited on the surface of the base fabric; the fabric also includes a modified hollow microsphere layer, which is located between the base fabric and the nano-graphene film layer, and the modified hollow microsphere layer comprises a plurality of modified hollow microspheres, the surface of which is coated with titanium dioxide and jade powder.

[0049] Specifically, the base fabric is one of the following: polyester base fabric, nylon base fabric, polypropylene base fabric, pure cotton base fabric, or silk base fabric.

[0050] This invention also provides a method for preparing a fabric with a cooling function, the method comprising:

[0051] (1) A. Prepare a jade powder suspension by suspending jade powder in water and heating it; prepare a titanium-containing solution by dissolving titanium-containing raw materials in anhydrous ethanol; and prepare an ethanol solution by using anhydrous ethanol and deionized water.

[0052] The reaction conditions for this step are selected from at least one of (I) to (III):

[0053] (I) The titanium-containing solution is one of tetraethyl titanate solution, tetramethyl titanate solution, tetrapropyl titanate solution, and tetrabutyl titanate solution;

[0054] (II) The mass ratio of jade powder to titanium-containing raw materials is (2-4):(6-10);

[0055] (III) The volume ratio of the jade powder suspension, the titanium-containing solution, and the ethanol solution is (1-2):(2-5):(4-8).

[0056] B. Add the titanium-containing solution to the jade powder suspension, let it settle for 10-30 minutes, and then add the ethanol solution while stirring to obtain the reaction solution;

[0057] C. Hollow microspheres are added to the reaction solution, ultrasonically vibrated, deionized water is added, and a hydrothermal reaction is carried out to obtain modified hollow microspheres; wherein, the hollow microspheres in this application are all hollow glass microspheres;

[0058] The reaction conditions for this step are selected from at least one of (Ⅳ) to (Ⅶ):

[0059] (Ⅳ) The mass ratio of hollow microspheres to titanium-containing raw materials is (1-10):(1-5);

[0060] (V) The volume ratio of the added deionized water to the ethanol solution is (1-1.5):(1-2);

[0061] (VI) The ultrasonic oscillation time is 5 to 10 minutes under the conditions of 28 kHz frequency and 100 W power.

[0062] (VII) The hydrothermal reaction conditions are to raise the temperature to 120-170℃ at a rate of 1-4℃ / min, and then keep the temperature constant for 3-5 hours.

[0063] (2) A modified hollow microsphere layer is prepared by coating a number of modified hollow microspheres onto the surface of the base fabric using a coating finishing method.

[0064] In this step, the base fabric is first pretreated: the base fabric is washed with clean water to remove surface stains and then dried to remove moisture.

[0065] In this step, the base fabric is one of the following: polyester base fabric, nylon base fabric, polypropylene base fabric, pure cotton base fabric, and silk base fabric.

[0066] In this step, modified hollow microspheres and aqueous acrylic emulsion are mixed to form a coating liquid, with a mass ratio of modified hollow microspheres to aqueous acrylic emulsion of 1:3.

[0067] (3) Using graphene as the target material and a base fabric coated with the modified hollow microspheres as the substrate, a nano-graphene film is deposited on the surface of the modified hollow microspheres by vacuum deposition to obtain a fabric with a cooling function.

[0068] In this step, the vacuum deposition method is magnetron sputtering, with graphene as the target material, sputtering power of 60W to 100W, sputtering for 10 to 20 minutes, to deposit a nano-graphene film on the surface of the modified hollow microspheres.

[0069] Specifically, the thickness ratio of the modified hollow microsphere layer to the nanographene film layer is (3-5):(8-12).

[0070] The present invention will be described in detail below through specific examples and embodiments. It should also be understood that the following embodiments are only for specific illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0071] Example 1

[0072] (1) Take jade powder and tetraethyl titanate in a mass ratio of 2:6. Suspend the jade powder in water and heat to prepare a jade powder suspension. Dissolve the tetraethyl titanate in anhydrous ethanol to prepare a tetraethyl titanate solution. Stir thoroughly. Use anhydrous ethanol and deionized water to prepare an ethanol solution (concentration 60%). The volume ratio of the prepared jade powder suspension, tetraethyl titanate solution and ethanol solution is 1:2:4.

[0073] Add tetraethyl titanate solution to jade powder suspension, allow to settle for 20 minutes, then slowly add ethanol solution while stirring to obtain reaction solution;

[0074] Hollow microspheres were added to the reaction solution, wherein the mass ratio of hollow microspheres to tetraethyl titanate was 10:5. The mixture was ultrasonically vibrated for 8 minutes at a frequency of 28 kHz and a power of 100 W. Deionized water was then added, with a volume ratio of deionized water to ethanol solution of 1:1.

[0075] The hollow microspheres, along with the solution, were then transferred to a 1L polytetrafluoroethylene-lined reactor. After sealing, the reactor was placed in a heating furnace and heated to 140℃ at a rate of 2℃ / min. The reactor was then kept at this temperature for 3 hours. After the reaction was completed, the hollow microspheres were removed and washed three times with acetone, anhydrous ethanol, and deionized water, respectively. The microspheres were then dried at 80℃ for 10 hours to obtain modified hollow microspheres with a thin film of titanium dioxide and jade powder on their surface.

[0076] (2) The polyester base fabric is washed with clean water to remove surface stains and then dried to remove moisture. The modified hollow microspheres and water-washed acrylic emulsion are mixed in a mass ratio of 1:3 to prepare a coating liquid. The coating liquid is then applied to the treated polyester base fabric to obtain a modified hollow microsphere layer.

[0077] (3) Using graphene as the target material and polyester base fabric coated with modified hollow microspheres as the substrate, magnetron sputtering was performed with a sputtering power of 60W for 15 minutes to deposit a nano-graphene layer on the surface of the modified hollow microspheres; the thickness ratio of the modified hollow microspheres to the nano-graphene film was controlled to be 3:8 to obtain a fabric with cooling function.

[0078] Example 2

[0079] (1) Take jade powder and tetraethyl titanate in a mass ratio of 3:8. Suspend the jade powder in water and heat to prepare a jade powder suspension. Dissolve the tetraethyl titanate in anhydrous ethanol to prepare a tetraethyl titanate solution. Stir thoroughly. Use anhydrous ethanol and deionized water to prepare an ethanol solution (concentration 60%). The volume ratio of the prepared jade powder suspension, tetraethyl titanate solution and ethanol solution is 1:3:5.

[0080] Add tetraethyl titanate solution to jade powder suspension, allow to settle for 20 minutes, then slowly add ethanol solution while stirring to obtain reaction solution;

[0081] Hollow microspheres were added to the reaction solution, wherein the mass ratio of hollow microspheres to tetraethyl titanate was 8:5. The mixture was ultrasonically vibrated for 10 minutes at a frequency of 28 kHz and a power of 100 W. Deionized water was then added, and the volume ratio of the added deionized water to the ethanol solution was 1:1.

[0082] The hollow microspheres, along with the solution, were then transferred to a 1L polytetrafluoroethylene-lined reactor. After sealing, the reactor was placed in a heating furnace and heated to 150℃ at a rate of 3℃ / min. The reactor was then kept at this temperature for 4 hours. After the reaction was completed, the hollow microspheres were removed and washed three times with acetone, anhydrous ethanol, and deionized water, respectively. The microspheres were then dried at 80℃ for 10 hours to obtain modified hollow microspheres with a thin film of titanium dioxide and jade powder on their surface.

[0083] (2) The nylon base fabric is washed with clean water to remove surface stains and then dried to remove moisture. The modified hollow microspheres and water-washed acrylic emulsion are mixed in a mass ratio of 1:3 to prepare a coating liquid. The coating liquid is then applied to the treated nylon base fabric to obtain a modified hollow microsphere layer.

[0084] (3) Using graphene as the target material and nylon base fabric coated with modified hollow microspheres as the substrate, magnetron sputtering was performed with a sputtering power of 70W for 12 minutes to deposit a nano-graphene layer on the surface of the modified hollow microspheres; the thickness ratio of the modified hollow microspheres to the nano-graphene film was controlled to be 3:10 to obtain a fabric with cooling function.

[0085] Example 3

[0086] (1) Take jade powder and tetrabutyl titanate in a mass ratio of 3:8. Suspend the jade powder in water and heat to prepare a jade powder suspension. Dissolve the tetrabutyl titanate in anhydrous ethanol to prepare a tetrabutyl titanate solution. Stir thoroughly. Use anhydrous ethanol and deionized water to prepare an ethanol solution (concentration 60%). The volume ratio of the prepared jade powder suspension, tetrabutyl titanate solution and ethanol solution is 1.5:4:8.

[0087] Tetrabutyl titanate solution was added to jade powder suspension and allowed to settle for 25 minutes. Then, ethanol solution was slowly added while stirring to obtain reaction solution.

[0088] Hollow microspheres were added to the reaction solution, wherein the mass ratio of hollow microspheres to tetraethyl titanate was 7:5. The mixture was ultrasonically vibrated for 10 minutes at a frequency of 28 kHz and a power of 100 W. Deionized water was then added, and the volume ratio of the added deionized water to the ethanol solution was 1:1.

[0089] The hollow microspheres, along with the solution, were then transferred to a 1L polytetrafluoroethylene-lined reactor. After sealing, the reactor was placed in a heating furnace and heated to 160℃ at a rate of 3℃ / min. The reactor was then kept at this temperature for 4 hours. After the reaction was completed, the hollow microspheres were removed and washed three times with acetone, anhydrous ethanol, and deionized water, respectively. The microspheres were then dried at 80℃ for 10 hours to obtain modified hollow microspheres with a thin film of titanium dioxide and jade powder on their surface.

[0090] (2) The polypropylene base fabric is washed with clean water to remove surface stains and then dried to remove moisture. The modified hollow microspheres and water-washed acrylic emulsion are mixed in a mass ratio of 1:3 to prepare a coating liquid. The coating liquid is then applied to the treated polypropylene base fabric to obtain a modified hollow microsphere layer.

[0091] (3) Using graphene as the target material and polypropylene base fabric coated with modified hollow microspheres as the substrate, magnetron sputtering was performed at a sputtering power of 80W for 10 minutes to deposit a nano-graphene layer on the surface of the modified hollow microspheres. The thickness ratio of the modified hollow microspheres to the nano-graphene film was controlled to be 4:10 to obtain a fabric with cooling function.

[0092] Example 4

[0093] (1) Take jade powder and tetrabutyl titanate in a mass ratio of 4:10. Suspend the jade powder in water and heat to prepare a jade powder suspension. Dissolve the tetrabutyl titanate in anhydrous ethanol to prepare a tetrabutyl titanate solution. Stir thoroughly. Use anhydrous ethanol and deionized water to prepare an ethanol solution (concentration 60%). The volume ratio of the prepared jade powder suspension, tetrabutyl titanate solution and ethanol solution is 2:5:8.

[0094] Tetrabutyl titanate solution was added to jade powder suspension and allowed to settle for 25 minutes. Then, ethanol solution was slowly added while stirring to obtain reaction solution.

[0095] Hollow microspheres were added to the reaction solution, wherein the mass ratio of hollow microspheres to tetraethyl titanate was 7:5. The mixture was ultrasonically vibrated for 10 minutes at a frequency of 28 kHz and a power of 100 W. Deionized water was then added, and the volume ratio of the added deionized water to the ethanol solution was 1:1.

[0096] The hollow microspheres, along with the solution, were then transferred to a 1L polytetrafluoroethylene-lined reactor. After sealing, the reactor was placed in a heating furnace and heated to 160℃ at a rate of 3℃ / min. The reactor was then kept at this temperature for 4 hours. After the reaction was completed, the hollow microspheres were removed and washed three times with acetone, anhydrous ethanol, and deionized water, respectively. The microspheres were then dried at 80℃ for 10 hours to obtain modified hollow microspheres with a thin film of titanium dioxide and jade powder on their surface.

[0097] (2) The pure cotton base fabric is washed with clean water to remove surface stains and then dried to remove moisture; the modified hollow microspheres and water-washed acrylic emulsion are mixed in a mass ratio of 1:3 to prepare a coating liquid, and the coating liquid is applied to the treated pure cotton base fabric to obtain a modified hollow microsphere layer.

[0098] (3) Using graphene as the target material and pure cotton base fabric coated with modified hollow microspheres as the substrate, magnetron sputtering was performed with a sputtering power of 70W for 10 minutes to deposit a nano-graphene layer on the surface of the modified hollow microspheres; the thickness ratio of the modified hollow microspheres to the nano-graphene film was controlled to be 3:12 to obtain a fabric with cooling function.

[0099] Comparative Example 1

[0100] The difference between this comparative example and Example 1 is that a nano-graphene film layer is directly deposited on the polyester base fabric, without the modified hollow microsphere layer.

[0101] Comparative Example 2

[0102] Unfinished polyester fabric.

[0103] Comparative Example 3

[0104] The difference between this comparative example and Example 1 is that the hollow microspheres were not modified.

[0105] Performance testing

[0106] Cooling effect test: Using GB / T 35263-2017 "Test and evaluation of cooling performance between textiles", the Q-max (cooling coefficient of contact) of the fabrics prepared in Examples 1 to 4 and Comparative Examples 1 to 3 before washing was tested. The test results are shown in Table 1.

[0107] The fabrics prepared in Examples 1-4 and Comparative Examples 1-3 were washed as follows: At 25°C, the fabrics were immersed in a 20% sodium stearate solution for 5 minutes, then rinsed five times with clean water and dried to complete one wash cycle. The fabrics prepared in Examples 1-4 and Comparative Examples 1-3 were washed 10 times. The Q-max (cooling coefficient) of the fabrics prepared in Examples 1-4 and Comparative Examples 1-3 after washing was determined according to GB / T 35263-2017 "Test and Evaluation of Cooling Properties of Textiles in Contact". The test results are shown in Table 1.

[0108] UV protection performance: The fabrics prepared in Examples 1-4 and Comparative Examples 1-3 were used as test samples to test the UV protection coefficient. The test results are shown in Table 2.

[0109] Table 1. Q-max values ​​of the fabrics prepared in Examples 1-4 and Comparative Examples 1-3

[0110] Example 1 0.335 0.314 Example 2 0.364 0.348 Example 3 0.348 0.333 Example 4 0.355 0.339 Comparative Example 1 0.277 0.226 Comparative Example 2 0.184 0.134 Comparative Example 3 0.301 0.264

[0111] As shown in Table 1, a larger Q-max value indicates a stronger cooling sensation felt by the skin. The Q-max of the cooling fabric prepared by the method of this application, both before and after washing, is significantly greater than that of the fabrics prepared in Comparative Examples 1-3. Furthermore, the Q-max reduction rate of the cooling fabric of this application after washing is 4.3-6.3%, while the reduction rate of the Q-max of the comparative fabrics after washing is 12.3-27.2%. This indicates that the cooling effect of the fabric prepared by this application is significantly improved, and also shows that this application, through the high heat dissipation of the nano-graphene film layer and the auxiliary cooling effect of the modified hollow microsphere layer, can greatly assist the fabric in cooling down and achieve a lasting cooling effect.

[0112] Table 2 shows the UV protection properties of the fabrics prepared in Examples 1-4 and Comparative Examples 1-3.

[0113]

[0114]

[0115] As shown in Table 2, the fabric prepared in this application embodiment has excellent UV protection performance compared with the fabrics prepared in Comparative Examples 1 to 3. This is because the nano-graphene and titanium dioxide in this application have a synergistic effect, which improves the UV protection performance of the fabric.

[0116] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A fabric with a cooling function, characterized in that, The fabric includes a base fabric and a nano-graphene film layer deposited on the surface of the base fabric; the fabric also includes a modified hollow microsphere layer, which is located between the base fabric and the nano-graphene film layer. The modified hollow microsphere layer includes a plurality of modified hollow microspheres, which are obtained by coating the surface of hollow glass microspheres with titanium dioxide and jade powder using a hydrothermal method. The preparation process of the modified hollow microspheres is as follows: A. Prepare a jade powder suspension by suspending jade powder in water and heating it; prepare a titanium-containing solution by selecting titanium-containing raw materials; prepare an ethanol solution; B. Add the titanium-containing solution to the jade powder suspension, allow it to settle, and then add the ethanol solution while stirring to obtain a reaction solution; C. Add hollow glass microspheres to the reaction solution, sonicate, add deionized water, and carry out a hydrothermal reaction to obtain modified hollow microspheres; The modified hollow microsphere layer is prepared by mixing modified hollow microspheres with an aqueous acrylic emulsion to form a coating liquid, and then coating a number of the modified hollow microspheres onto the surface of a base fabric using a coating finishing method. The thickness ratio of the modified hollow microsphere layer to the nano-graphene film layer is (3~5):(8~12); The base fabric is one of polyester base fabric, nylon base fabric, polypropylene base fabric, pure cotton base fabric, or silk base fabric.

2. A method for preparing a fabric with a cooling function, characterized in that, The method includes: (1) Modified hollow microspheres were obtained by coating the surface of hollow glass microspheres with titanium dioxide and jade powder using a hydrothermal method. The preparation process of the modified hollow microspheres is as follows: A. Prepare a jade powder suspension by suspending jade powder in water and heating it; prepare a titanium-containing solution by selecting titanium-containing raw materials; prepare an ethanol solution; B. Add the titanium-containing solution to the jade powder suspension, allow it to settle, and then add the ethanol solution while stirring to obtain a reaction solution; C. Add hollow glass microspheres to the reaction solution, sonicate, add deionized water, and carry out a hydrothermal reaction to obtain modified hollow microspheres; (2) The modified hollow microspheres and aqueous acrylic emulsion are mixed to form a coating liquid, and a number of the modified hollow microspheres are coated on the surface of the base fabric by coating finishing method to obtain a modified hollow microsphere layer. The base fabric is one of polyester base fabric, nylon base fabric, polypropylene base fabric, pure cotton base fabric, and silk base fabric; (3) Using graphene as the target material and a base fabric coated with the modified hollow microspheres as the substrate, a nano-graphene film is deposited on the surface of the modified hollow microspheres by vacuum deposition to obtain a fabric with cooling function; the vacuum deposition method is magnetron sputtering. The thickness ratio of the modified hollow microsphere layer to the nano-graphene film layer is (3~5):(8~12).

3. The method for preparing the fabric with cooling function according to claim 2, characterized in that, The reaction conditions for step A are selected from at least one of (I) to (III): (I) The titanium-containing solution is one of tetraethyl titanate solution, tetramethyl titanate solution, tetrapropyl titanate solution, and tetrabutyl titanate solution; (II) The mass ratio of the jade powder to the titanium-containing raw material is (2~4):(6~10); (III) The volume ratio of the jade powder suspension, the titanium-containing solution, and the ethanol solution is (1~2):(2~5):(4~8).

4. The method for preparing a fabric with a cooling function according to claim 2, characterized in that, The deposition time in step B is 10~30 min.

5. The method for preparing a fabric with a cooling function according to claim 2, characterized in that, The reaction conditions for step C are selected from at least one of (IV) to (VII): (IV) The mass ratio of the hollow glass microspheres to the titanium-containing raw material is (1~10):(1~5); (V) The volume ratio of the added deionized water to the ethanol solution is (1~1.5):(1~2); (VI) The ultrasonic oscillation time is 5~10 min; (VII) The hydrothermal reaction conditions are to raise the temperature to 120-170°C at a rate of 1-4°C / min, and then keep the temperature constant for 3-5 hours.

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