Thermoregulating and moisture-wicking material and use thereof in fibers and wadding

Abstract

The present invention belongs to the technical field of thermoregulating and moisture-wicking materials, and particularly relates to a thermoregulating and moisture-wicking material and the use thereof in fibers and wadding. A preparation method for the thermoregulating and moisture-wicking material comprises: the surface modification of inorganic nanoparticles, the preparation of a shell material solution, the preparation of a core material solution, and the preparation of the thermoregulating and moisture-wicking material, thereby finally obtaining a phase change microcapsule, i.e., the thermoregulating and moisture-wicking material, in which a phase change material is used as a core and a composite material of a cross-linked polyvinylpyrrolidone / 2-[[(butylamino)carbonyl]oxy]ethyl acrylate copolymer doped with inorganic nanoparticles is used as a shell. The thermoregulating and moisture-wicking material has high thermal conductivity and good washing durability, can be incorporated into a fiber matrix by means of pre-spinning addition, is applicable to the preparation of wadding, can be made into a coating solution to form a coating on the surface of a fabric by means of processes such as hot rolling and spray coating, and has potential application values in many fields such as workwear, firefighter uniforms, thermal insulation products, beddings, sportswear, and shoes and hats.

Description

A temperature-regulating and perspiration-wicking material and its application in fibers and wadding. Technical Field

[0001] This invention belongs to the technical field of temperature-regulating and perspiration-wicking materials, specifically relating to a temperature-regulating and perspiration-wicking material and its application in fibers and wadding. Background Technology

[0002] With the continuous development of modern technology and people's increasing demands for quality of life and the performance of various textile products, statistics show that the Chinese high-performance fiber market reached 45 billion yuan in 2023, while the global high-performance fiber market reached 131.917 billion yuan, and is projected to reach 238.983 billion yuan by 2029. Fibers with temperature-regulating functions are an important category of high-performance fibers, and consumers have an increasingly urgent need for textiles that can achieve temperature regulation.

[0003] Commercially available temperature-regulating fibers generally have the following problems:

[0004] (1) Limited temperature adjustment range:

[0005] Common phase change materials have relatively fixed and narrow phase change temperatures, making it difficult to meet the complex and ever-changing temperature requirements of actual environments. For example, a certain phase change material suitable for indoor insulation in winter has a phase change temperature set at 20-22℃. When the indoor temperature fluctuates beyond this range, its temperature regulation effect will be greatly reduced, and it will not be able to play an effective role in high-temperature environments in summer (such as above 30℃) or extremely cold winters (such as below 0℃).

[0006] (2) Low thermal conductivity:

[0007] Most phase change materials (PCCs) have poor thermal conductivity, meaning that heat transfer within the material is slow. This results in insufficient heat absorption or release, affecting the timeliness and effectiveness of temperature regulation. In practical applications, the ambient temperature may change significantly before the PCC has completed heat exchange, leading to a noticeable temperature lag.

[0008] (3) Stability issues:

[0009] After multiple phase change cycles, stability issues such as phase separation and leakage may occur, thereby reducing its temperature regulation performance. For example, some phase change materials are prone to phase separation during long-term use due to density differences between different phases and compatibility issues between the material and the carrier, making it impossible for the originally uniformly distributed phase change material to perform its temperature regulation function properly.

[0010] In existing technologies, phase change materials are combined with high thermal conductivity materials such as graphene and carbon nanotubes through composite technology to improve their thermal conductivity. Furthermore, by optimizing the formulation and loading process of phase change materials, their stability can be improved to a certain extent. The emergence of new temperature-regulating materials allows them to change their molecular structure or physical state according to changes in ambient temperature, thereby achieving the function of temperature control.

[0011] Despite the progress made in the above technologies, temperature-regulating materials in the textile industry still have some problems, such as: while improving thermal conductivity, it is difficult to simultaneously maintain properties such as latent heat of phase change and stability; the temperature regulation range is not wide enough and the sensitivity to temperature changes is poor, which cannot meet the needs of some application scenarios that require precise temperature regulation; the water washability is poor, and the temperature regulation function is greatly reduced after multiple washes. Summary of the Invention

[0012] To address the problems existing in the prior art, this invention provides a temperature-regulating and perspiration-wicking material and its application in fibers and wadding, achieving the following objectives:

[0013] Improving the stability of phase change materials allows for more precise temperature regulation, while also endowing textiles with multiple functions such as temperature regulation and moisture wicking, thus meeting the needs of various fields.

[0014] Improve the thermal conductivity, mechanical strength, and compatibility with fiber substrates of temperature-regulating and perspiration-wicking materials to ensure water-resistant performance.

[0015] To solve the above technical problems, the present invention adopts the following technical solution:

[0016] One objective of this invention is to provide a temperature-regulating and perspiration-wicking material, the preparation method of which includes the following steps:

[0017] S1, Surface modification of inorganic nanoparticles

[0018] Inorganic nanoparticles were added to anhydrous ethanol and ultrasonically dispersed for 5–10 min. A silane coupling agent was added and mixed evenly. After reacting for 6–8 h, the mixture was centrifuged, washed, and dried to obtain modified inorganic nanoparticles.

[0019] Preferably, the inorganic nanoparticles are one or more of graphene, titanium dioxide, boron nitride, and carbon nanotubes.

[0020] Furthermore, the inorganic nanoparticles have a particle size of 4–10 nm.

[0021] Preferably, the silane coupling agent is KH570, and the amount added is 13-20% of the mass of the inorganic nanoparticles.

[0022] S2, Preparation of Shell Material Solution

[0023] N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, and modified inorganic nanoparticles were added to anhydrous ethanol and stirred for 20-30 min. Then, an initiator and a crosslinking agent were added and stirring was continued for 5-10 min at a stirring rate of 200-300 r / min to obtain a shell material solution.

[0024] Preferably, the mass ratio of N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, modified inorganic nanoparticles, and anhydrous ethanol is 10-14:4-6:1.2-1.6:70-80.

[0025] Preferably, the initiator is azobisisobutyronitrile, and the amount added is 1.3 to 1.8% of the mass of N-vinylpyrrolidone.

[0026] Preferably, the crosslinking agent is N,N ， - Methylenebisacrylamide, added in an amount of 2-3% of the mass of N-vinylpyrrolidone.

[0027] S3, Preparation of core material solution

[0028] The phase change material and emulsifier are added to deionized water, and the mixture is stirred for 20 to 30 minutes at a stirring rate of 800 to 1000 r / min at 40 to 50°C using a constant temperature magnetic stirrer to obtain the core material solution.

[0029] Preferably, the phase change material is one or more of n-octadecane, paraffin, palmitic acid and its esters, fatty acids and their esters, pentaerythritol, and trimethylolethane.

[0030] Preferably, the emulsifier is one or more of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, Span 80, and Tween 80.

[0031] Preferably, the mass ratio of the phase change material, emulsifier, and deionized water is 20–26:4–7:60–70.

[0032] S4. Preparation of Temperature-Regulating and Perspiration-Wicking Materials

[0033] The core material solution was stirred at a stirring rate of 600-700 r / min while the shell material solution was added to the core material solution. Then the temperature was raised to 65-75℃ and the reaction was carried out under nitrogen protection for 6-7 h to obtain a phase change microcapsule suspension with a phase change material as the core and a cross-linked polyvinylpyrrolidone / 2-acrylic acid-2-[[(butylamino)-carbonyl]oxo]ethyl ester copolymer doped with inorganic nanoparticles as the shell. The suspension was then filtered, washed with ethanol solution, dried and ground to obtain a temperature-regulating and perspiration-wicking material.

[0034] Preferably, the volume ratio of the core material solution to the shell material solution is 1-1.1:1.3-1.7.

[0035] Preferably, the drying temperature is 60-80°C and the drying time is 12-24 hours.

[0036] To address the issues of easy loss and leakage of phase change materials, microcapsule structures are created by encapsulating phase change materials with polymer materials. However, traditional polymer shells have poor thermal conductivity, insufficient mechanical strength, and poor bonding with fibers. When used in the fiber industry, long-term water washing can cause the microcapsules to detach and break, affecting the temperature regulation capability of the fibers. Therefore, the shell material of this invention is a composite material of cross-linked polyvinylpyrrolidone / 2-acrylic acid-2-[[(butylamino)-carbonyl]oxo]ethyl ester copolymer doped with inorganic nanoparticles.

[0037] Adding inorganic nanoparticles to the shell material can improve its thermal conductivity. However, directly adding inorganic nanoparticles to the shell material only involves a simple physical bonding force, resulting in a weak bond and easy detachment of the nanoparticles. Therefore, the inorganic nanoparticles were first modified using KH570 by adding carbon-carbon double bonds to their surface, resulting in modified inorganic nanoparticles. These modified nanoparticles can participate in the free radical polymerization reaction of the shell material, covalently incorporating into it and improving the thermal stability and recyclability of the microcapsules.

[0038] Temperature-regulating and wicking materials made with cross-linked polyvinylpyrrolidone (PVP) as the shell can form a dense protective layer around the core material. PVP has good compatibility with the substrate and excellent moisture absorption, which can improve the moisture absorption and wicking effect of fibers, wadding, or coatings to some extent. However, PVP contains rigid pyrrole rings, resulting in high rigidity and stability of the shell material, but also poor flexibility and brittleness. The doping of inorganic nanoparticles also leads to insufficient shell flexibility. While adding it to fibers does not significantly affect fiber strength, long-term water washing can easily cause the shell material to crack and lose phase change materials. Therefore, adding 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester copolymer containing flexible blocks can slow down or prevent water washing cracking of the temperature-regulating and wicking material, enhancing its water resistance.

[0039] The second objective of this invention is to provide an application of a temperature-regulating and perspiration-wicking material in fibers and wadding, the application including adding it to the fiber matrix in the form of pre-spinning additives; using it for the preparation of filling wadding; and forming a coating on the fabric surface by means of hot rolling, spraying, etc.

[0040] Preferably, the fiber matrix includes, but is not limited to, one of polyester, nylon, acrylic, polypropylene, spandex, lyocell fiber, and viscose fiber.

[0041] Preferably, the fabric includes, but is not limited to, one of nonwoven fabric, nylon-spandex fabric, or polyester-spandex fabric.

[0042] By adopting the above technical solution, the technical effect achieved by this invention is as follows:

[0043] 1. The temperature-regulating and perspiration-wicking material prepared by this invention has good compatibility and dispersibility, and has potential application value in many fields such as work clothes, fire-fighting clothing, thermal products, bedding, sportswear and footwear.

[0044] 2. The temperature-regulating and perspiration-wicking material prepared by this invention has good thermal conductivity, which is 1.36 to 1.54 W / (m·K).

[0045] 3. The temperature-regulating and moisture-wicking material prepared by this invention has good compatibility with various fiber matrices. It is introduced into the fiber matrix by adding it before spinning. The resulting fibers and fabrics have the function of wicking away sweat and moisture and have good temperature regulation performance. In particular, it has good temperature response capability in environments where the room temperature drops rapidly from about 25°C to below 0°C, and plays a role in buffering and regulating temperature, making the human body feel more comfortable when facing environments with sudden temperature changes.

[0046] 4. The temperature-regulating and perspiration-wicking material prepared in this invention is made into a coating liquid and applied to the surface of the fabric by means of hot rolling, spraying, etc. After drying, a coating is formed on the surface of the fabric, minimizing the impact of the coating on the fabric's feel and mechanical properties. It is suitable for textiles that precisely achieve temperature regulation effects, such as summer cooling fabrics and blankets.

[0047] 5. Adding temperature-regulating and moisture-wicking materials to fibers and wadding can improve their heat retention capacity. For example, adding temperature-regulating and moisture-wicking materials to filling wadding can achieve a heat retention rate of over 80% (tested according to GB / T 35762-2017). Attached Figure Description

[0048] Figure 1 shows the temperature adjustment of the filler flocs prepared in Example 1 (initial temperature 10°C) and commercially available ordinary flocs (initial temperature 10°C) placed in an environment of 40°C.

[0049] Figure 2 shows the temperature adjustment of the filler floc prepared in Example 1 (initial temperature 40°C) and the commercially available ordinary floc (initial temperature 40°C) placed in an environment of 10°C. Detailed Implementation

[0050] The present invention will be further illustrated below with reference to specific embodiments.

[0051] Example 1: A temperature-regulating and perspiration-wicking material and its application in fibers and wadding, wherein the preparation of the temperature-regulating and perspiration-wicking material includes the following steps:

[0052] S1, Surface modification of inorganic nanoparticles

[0053] Inorganic nanoparticles were added to anhydrous ethanol and ultrasonically dispersed for 8 min. A silane coupling agent was added and mixed evenly. After reacting for 7 h, the mixture was centrifuged, washed, and dried to obtain modified inorganic nanoparticles.

[0054] The inorganic nanoparticles are graphene with a particle size of 7 nm.

[0055] The silane coupling agent is KH570, and the amount added is 15% of the mass of the inorganic nanoparticles.

[0056] S2, Preparation of Shell Material Solution

[0057] N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, and modified inorganic nanoparticles were added to anhydrous ethanol and stirred for 25 min. Then, an initiator and a crosslinking agent were added and stirring was continued for 7 min at a stirring rate of 250 r / min to obtain a shell material solution.

[0058] The mass ratio of N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, modified inorganic nanoparticles, and anhydrous ethanol is 12:5:1.5:75.

[0059] The initiator is azobisisobutyronitrile, and the amount added is 1.5% of the mass of N-vinylpyrrolidone.

[0060] The crosslinking agent is N,N ， - Methylenebisacrylamide, added in an amount of 2.5% of the mass of N-vinylpyrrolidone.

[0061] S3, Preparation of core material solution

[0062] The phase change material and emulsifier were added to deionized water and stirred at 900 r / min for 25 min at 45°C using a constant temperature magnetic stirrer to obtain the core material solution.

[0063] The phase change material is palmitic acid, and the emulsifier is sodium dodecylbenzenesulfonate.

[0064] The mass ratio of the phase change material, emulsifier, and deionized water is 24:6:65.

[0065] S4. Preparation of Temperature-Regulating and Perspiration-Wicking Materials

[0066] The core material solution was stirred at a stirring rate of 650 r / min while the shell material solution was added to the core material solution. Then the temperature was raised to 70℃ and the reaction was carried out under nitrogen protection for 6.5 h to obtain a phase change microcapsule suspension with a phase change material as the core and a cross-linked polyvinylpyrrolidone / 2-acrylic acid-2-[[(butylamino)-carbonyl]oxo]ethyl ester copolymer doped with inorganic nanoparticles as the shell. After filtration, washing with 70% ethanol solution, drying and grinding to 1 μm, the temperature-regulating and perspiration-wicking material was obtained.

[0067] The volume ratio of the core material solution to the shell material solution is 1.05:1.55.

[0068] The drying temperature is 70℃, and the drying time is 20 hours.

[0069] Example 2: A temperature-regulating and perspiration-wicking material and its application in fibers and wadding, wherein the preparation of the temperature-regulating and perspiration-wicking material includes the following steps:

[0070] S1, Surface modification of inorganic nanoparticles

[0071] Inorganic nanoparticles were added to anhydrous ethanol and ultrasonically dispersed for 5 min. Silane coupling agent was added and mixed evenly. After reacting for 6 h, the mixture was centrifuged, washed, and dried to obtain modified inorganic nanoparticles.

[0072] The inorganic nanoparticles are titanium dioxide with a particle size of 4 nm.

[0073] The silane coupling agent is KH570, and the amount added is 13% of the mass of the inorganic nanoparticles.

[0074] S2, Preparation of Shell Material Solution

[0075] N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, and modified inorganic nanoparticles were added to anhydrous ethanol and stirred for 20 min. Then, an initiator and a crosslinking agent were added and stirring was continued for 5 min at a stirring rate of 200 r / min to obtain a shell material solution.

[0076] The mass ratio of N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, modified inorganic nanoparticles, and anhydrous ethanol is 10:4:1.2:70.

[0077] The initiator is azobisisobutyronitrile, and the amount added is 1.3% of the mass of N-vinylpyrrolidone.

[0078] The crosslinking agent is N,N ， - Methylenebisacrylamide, added at 2% of the mass of N-vinylpyrrolidone.

[0079] S3, Preparation of core material solution

[0080] The phase change material and emulsifier were added to deionized water and stirred at 800 r / min for 20 min at 40°C using a constant temperature magnetic stirrer to obtain the core material solution.

[0081] The phase change material is paraffin wax, and the emulsifier is Tween 80.

[0082] The mass ratio of the phase change material, emulsifier, and deionized water is 20:4:60.

[0083] S4. Preparation of Temperature-Regulating and Perspiration-Wicking Materials

[0084] The core material solution was stirred at a stirring rate of 600 r / min while the shell material solution was added to the core material solution. Then the temperature was raised to 65℃ and the reaction was carried out for 6 h under nitrogen protection to obtain a phase change microcapsule suspension with a phase change material as the core and a cross-linked polyvinylpyrrolidone / 2-acrylic acid-2-[[(butylamino)-carbonyl]oxo]ethyl ester copolymer doped with inorganic nanoparticles as the shell. After filtration, washing with 70% ethanol solution, drying and grinding to 1 μm, the temperature-regulating and perspiration-wicking material was obtained.

[0085] The volume ratio of the core material solution to the shell material solution is 1:1.3.

[0086] The drying temperature is 80℃, and the drying time is 12 hours.

[0087] Example 3: A temperature-regulating and perspiration-wicking material and its application in fibers and wadding, wherein the preparation of the temperature-regulating and perspiration-wicking material includes the following steps:

[0088] S1, Surface modification of inorganic nanoparticles

[0089] Inorganic nanoparticles were added to anhydrous ethanol and ultrasonically dispersed for 10 min. Silane coupling agent was added and mixed evenly. After reacting for 8 h, the mixture was centrifuged, washed, and dried to obtain modified inorganic nanoparticles.

[0090] The inorganic nanoparticles are boron nitride with a particle size of 10 nm.

[0091] The silane coupling agent is KH570, and the amount added is 20% of the mass of the inorganic nanoparticles.

[0092] S2, Preparation of Shell Material Solution

[0093] N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, and modified inorganic nanoparticles were added to anhydrous ethanol and stirred for 30 min. Then, an initiator and a crosslinking agent were added and stirring was continued for 10 min at a stirring rate of 300 r / min to obtain a shell material solution.

[0094] The mass ratio of N-vinylpyrrolidone, 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, modified inorganic nanoparticles, and anhydrous ethanol is 14:6:1.6:80.

[0095] The initiator is azobisisobutyronitrile, and the amount added is 1.8% of the mass of N-vinylpyrrolidone.

[0096] The crosslinking agent is N,N ， - Methylenebisacrylamide, added at 3% of the mass of N-vinylpyrrolidone.

[0097] S3, Preparation of core material solution

[0098] The phase change material and emulsifier were added to deionized water, and the mixture was stirred at 1000 r / min for 30 min at 50°C using a constant temperature magnetic stirrer to obtain the core material solution.

[0099] The phase change material is n-octadecane, and the emulsifier is sodium dodecyl sulfate.

[0100] The mass ratio of the phase change material, emulsifier, and deionized water is 26:7:70.

[0101] S4. Preparation of Temperature-Regulating and Perspiration-Wicking Materials

[0102] The core material solution was stirred at a stirring rate of 700 r / min while the shell material solution was added to the core material solution. Then the temperature was raised to 75℃ and the reaction was carried out for 7 h under nitrogen protection to obtain a phase change microcapsule suspension with a phase change material as the core and a cross-linked polyvinylpyrrolidone / 2-acrylic acid-2-[[(butylamino)-carbonyl]oxo]ethyl ester copolymer doped with inorganic nanoparticles as the shell. After filtration, washing with 70% ethanol solution, drying and grinding to 1 μm, the temperature-regulating and perspiration-wicking material was obtained.

[0103] The volume ratio of the core material solution to the shell material solution is 1.1:1.7.

[0104] The drying temperature is 60℃, and the drying time is 24 hours.

[0105] Comparative Example 1

[0106] Example 1, a representative example, was selected. 2-Acrylic acid-2-[[(butylamino)-carbonyl]oxo]ethyl ester was removed from S2, while the rest was the same as in Example 1. This was used as Comparative Example 1.

[0107] Comparative Example 2

[0108] Example 1, a representative example, was selected. Step S1 was omitted, and unmodified inorganic nanoparticles were directly added in step S2. All other steps were the same as in Example 1. This example served as Comparative Example 2.

[0109] Comparative Example 3

[0110] Example 1, a representative example, was selected. The modified inorganic nanoparticles in S2 were removed, and the rest were the same as in Example 1, serving as Comparative Example 3.

[0111] The thermal conductivity of the temperature-regulating and perspiration-wicking materials prepared in Examples 1-3 and Comparative Examples 1-3 was tested. Specific data are shown in Table 1.

[0112] Table 1

[0113]

[0114] As can be seen from Table 1, the temperature-regulating and sweat-wicking materials prepared in Examples 1-3 have high thermal conductivity, while the thermal conductivity of Comparative Example 3 is low. This indicates that the addition of inorganic nanoparticles significantly improves the thermal conductivity. The thermal conductivity of Comparative Example 2 is lower than that of Example 1 because the inorganic nanoparticles in Comparative Example 2 are not modified and have poor dispersion in the shell material, thus the thermal conductivity is lower than that of Example 1.

[0115] Examples 1-3 and Comparative Examples 1-3 were added to the spinning solution of Lyocell fiber as pre-spinning additives, and the fibers were wet-spun to produce temperature-regulating fibers. The temperature-regulating fibers were then made into fabrics, and the mechanical properties of the fibers, the enthalpy value of the fabrics, and the perspiration effect were tested. See Table 2 for details.

[0116] Table 2

[0117]

[0118] Table 2 illustrates that the temperature-regulating and sweat-wicking materials prepared using Examples 1-3 have better compatibility with the fiber matrix, resulting in fibers with good mechanical properties and excellent thermal conductivity and sweat-wicking function. The temperature-regulating and sweat-wicking material prepared in Comparative Example 1 did not contain 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester, and the reduction in flexible blocks led to a decrease in the fiber's breaking strength. In Comparative Example 2, the inorganic nanoparticles and the shell material were only physically bonded without chemical bonds, making them prone to detachment during fiber preparation, forming "impurities," thus significantly reducing the fiber's mechanical properties. Comparative Example 3 did not contain inorganic nanoparticles, resulting in a lower enthalpy value and insufficient sweat-wicking effect.

[0119] Note: The soaking time of the soaked surface, the water absorption rate of the soaked surface, and the one-way transfer index were determined in accordance with GB / T 21655.2-2019.

[0120] Examples 1-3 and Comparative Examples 1-3 were added to the filling wadding, and their heat preservation effect was tested. See Table 3 for details.

[0121] Table 3

[0122]

[0123] As shown in Table 3, the temperature-regulating and wicking materials prepared in Examples 1-3 have good compatibility with the filling wadding and good water resistance. The temperature-regulating and wicking material prepared in Comparative Example 1 did not contain 2-acrylate-2-[[(butylamino)-carbonyl]oxo]ethyl ester. The reduction in flexible blocks led to a decrease in the thermal insulation performance of the filling wadding with water washing. This is because the reduction in flexible blocks made the shell of the temperature-regulating and wicking material prone to cracking. During the water washing process, the cracking of the shell led to a decrease in the thermal insulation performance of the filling wadding. The inorganic nanoparticles in the shell of the temperature-regulating and wicking material prepared in Comparative Example 2 were unevenly dispersed and easily detached, so the water resistance was also poor. Comparative Example 3 did not contain inorganic nanoparticles, so the overall thermal insulation effect was poor, but the water resistance of the thermal insulation performance was good.

[0124] The temperature regulation of the filling floc prepared in Example 1 and the ordinary temperature-regulating floc purchased from the market under temperature changes were tested and plotted as curves. The filling floc prepared in Example 1 was used as the test sample and the ordinary temperature-regulating floc purchased from the market was used as the control sample. See Figures 1 and 2 for details.

[0125] As can be seen from Figures 1 and 2, when the ambient temperature changes abruptly, the temperature regulation is more gradual when the filling flocs prepared in Example 1 are added, indicating that its temperature regulation is more precise.

[0126] The temperature-regulating and perspiration-wicking materials prepared in Examples 1-3 and Comparative Example 1 were added to deionized water and stirred evenly to prepare a coating liquid (solid content of 40%). This coating liquid was then sprayed onto the surface of a fabric composed of 85% nylon and 15% spandex, with a spraying amount of 50 g / m². 2 After drying at 120-150℃ for 3-5 minutes, a coating is formed on the fabric surface. The enthalpy value and coolness upon contact of the coated fabric are tested, as detailed in Table 4.

[0127] Table 4

[0128]

[0129] As can be seen from Table 4, the coating liquid of the temperature-regulating and perspiration-wicking materials prepared in Examples 1-3 has a good bonding effect with the fabric and a better water-washing resistance. The enthalpy value decreases less after 20 washes. In contrast, the coating fabrics made from the temperature-regulating and perspiration-wicking materials prepared in Comparative Examples 1 and 2 show a significant decrease in enthalpy value after 20 washes. This also indicates that the temperature-regulating and perspiration-wicking material prepared in Comparative Example 1 is prone to breakage, and the inorganic nanoparticles of the temperature-regulating and perspiration-wicking material prepared in Comparative Example 2 are prone to detachment, thus resulting in poor water-washing resistance.

[0130] Unless otherwise specified, all proportions and percentages mentioned in this invention are mass proportions and mass percentages; all raw materials are commercially available.

[0131] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A temperature regulating perspiration management material characterized by, The preparation method of the temperature-regulating sweat-wicking material comprises the following steps: S1, surface modification of inorganic nanoparticles: inorganic nanoparticles are added to anhydrous ethanol and ultrasonically dispersed for 5-10 min, a silane coupling agent is added and uniformly mixed, and after reaction for 6-8 h, centrifugation, washing and drying are performed to obtain modified inorganic nanoparticles; S2, preparation of shell material solution: N-vinylpyrrolidone, 2-acrylic acid-2-[[(butylamino)- carbonyl]oxy]ethyl ester and modified inorganic nanoparticles are added to anhydrous ethanol and stirred for 20-30 min, an initiator and a crosslinking agent are then added and stirred for 5-10 min at a stirring rate of 200-300 r / min to obtain the shell material solution; S3, preparation of core material solution A phase change material and an emulsifier are added to deionized water, a constant-temperature magnetic stirrer is used, stirring is performed at a stirring rate of 800-1000 r / min at 40-50℃ for 20-30 min, and the core material solution is obtained; S4, preparation of temperature-regulating sweat-wicking material The core material solution is stirred at a stirring rate of 600-700 r / min, the shell material solution is added to the core material solution, then the temperature is raised to 65-75℃, and reaction is performed under nitrogen protection for 6-7 h to obtain a phase change microcapsule suspension, which is filtered, washed with an ethanol solution, dried, ground and obtained as the temperature-regulating sweat-wicking material.

2. The temperature regulating sweat management material of claim 1, wherein, The inorganic nanoparticles in S1 are one or more of graphene, titanium dioxide, boron nitride and carbon nanotubes. The particle size of the inorganic nanoparticles is 4-10 nm.

3. The temperature regulating sweat evaporative material according to claim 1, wherein, The silane coupling agent in S1 is KH570, and the amount added is 13-20% of the mass of the inorganic nanoparticles.

4. The temperature regulating sweat evaporative material of claim 1, wherein, The mass ratio of N-vinylpyrrolidone, 2-acrylic acid-2-[[( butylamino)-carbonyl]oxy]ethyl ester, modified inorganic nanoparticles and anhydrous ethanol in S2 is 10-14:4-6:1.2-1.6:70-80.

5. The temperature regulating sweat management material of claim 1, wherein, The initiator in S2 is azobisisobutyronitrile, and the amount added is 1.3-1.8% of the mass of N-vinylpyrrolidone. The crosslinking agent is N,N ， - methylenebisacrylamide, added in an amount of 2-3% of the mass of N-vinylpyrrolidone.

6. The temperature regulating sweat management material of claim 1, wherein, The phase change material in S3 is one or more of n-octadecane, paraffin, palmitic acid and esters thereof, fatty acids and esters thereof, pentaerythritol and trimethylol ethane.

7. The temperature regulating sweat evaporative material according to claim 1, wherein, The emulsifier in S3 is one or more of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, Span 80 and Tween 80.

8. The temperature regulating sweat management material of claim 1, wherein, The mass ratio of the phase change material, the emulsifier and deionized water in S3 is 20-26:4-7:60-70.

9. The temperature regulating sweat evaporative material according to claim 1, wherein, The volume ratio of the core material solution to the shell material solution in S4 is 1-1.1:1.3-1.

7. The drying temperature is 60-80℃, and the drying temperature is 12-24 h.

10. Use of a temperature-regulating perspiration material in fibres, fluff, characterised in that The application includes adding the temperature-regulating sweat-wicking material to a fiber substrate in the form of a pre-spinning additive; being used for the preparation of a filling flock; being made into a coating liquid to form a coating on the surface of a fabric in the form of hot rolling, spraying and the like; The fiber substrate is one of polyester, nylon, acrylic, polypropylene, spandex, lyocell fiber and viscose fiber. The fabric is one of non-woven fabric, nylon-spandex fabric and polyester-spandex fabric.

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