High-wear-resistance moisture power generation covering yarn as well as preparation method and application thereof

Abstract

The invention relates to the technical field of spinning, and discloses a high-wear-resistance moisture power generation core spun yarn and a preparation method and application thereof. The covering yarn is composed of an inner electrode, a power generation layer and an outer electrode. The inner electrode is made of silver-plated filaments, metal wires or carbon fibers. The power generation layer is made of moisture absorption modified cotton fibers, wool fibers, viscose fibers or bamboo pulp fibers; and the outer electrode is a perforated conductive non-woven fabric strip. During preparation, the surface of the inner electrode is coated with the power generation layer through friction spinning, and then the surface of the power generation layer is coated with the outer electrode through a yarn coating machine, so that a three-layer coated layered structure is formed. The conductive non-woven fabric is adopted as the outer electrode, the wear resistance of the yarn is greatly improved, the fibers are adopted as the power generation layer, the specific surface area of the power generation layer is increased, the moisture absorption power generation performance is enhanced, the moisture power generation core spun yarn good in wear resistance, stable in electrode medium and high in moisture absorption power generation power is obtained, and the requirements of the flexible wearable energy field are met.

Description

Technical Field

[0001] This application relates to the field of spinning technology, specifically to a high abrasion-resistant moisture-generating core-spun yarn, its preparation method, and its application. Background Technology

[0002] Moisture generators (MEGs) are a novel green energy harvesting technology that utilizes atmospheric moisture or water evaporation to generate electricity without the need for additional energy storage components. They offer advantages such as lightweight design, environmental friendliness, and simple structure, and are commonly used in wearable devices. The core of MEG technology lies in the interaction between materials and moisture, achieving energy conversion through charge separation and directional migration. This is primarily achieved through two main mechanisms: ion migration and charge separation. In the ion migration mechanism, hydrophilic materials adsorb moisture to form a conductive medium, and ions migrate directionally under the drive of the humidity gradient, being collected by electrodes to form an electric current. In the charge separation mechanism, special materials adsorb moisture, resulting in surface charge separation. The charges move along specific directions and are drawn out through electrodes to form an electric current.

[0003] Various moisture-generating devices with different structures have been developed. Among them, yarn-based devices, compared with thin-film and block-shaped devices, have advantages such as flexibility, good breathability, and mechanical stability. They can solve the shortcomings of traditional devices in terms of flexibility, integration, and comfort, making them an ideal solution for long-term autonomous power supply for wearable devices and IoT sensors. Their electrical output performance is mainly improved through structural design or material optimization. Chinese invention patent application CN121065871A discloses a core-sheath structure moisture-generating yarn, its preparation method, and its application. The yarn includes at least a metal core layer, a covering yarn layer, and a conductive coating. The covering yarn layer includes polyvinyl alcohol fibers doped with lithium chloride, which are tightly wrapped around the metal core layer through conjugated electrospinning. The conductive coating is a nano-conductive silver paint, and the conductive coating does not directly contact the metal core layer. This yarn has good flexibility and, while forming a stable output current and voltage, also has excellent surface waterproof and breathable properties, stability, and reusability.

[0004] However, the outer electrodes of existing yarn-based sensors are mainly made of conductive coatings, which are easy to peel off and affect the hygroscopicity of the power generation layer. In contrast, this application uses a perforated conductive nonwoven fabric as the outer electrode. The conductive nonwoven fabric has a stable structure and is not easily damaged during use, which would lead to the failure of the outer electrode. At the same time, the perforation allows the internal power generation layer to fully contact the external moisture, thereby improving the moisture absorption power generation. This approach can produce a moisture-generating yarn with good wear resistance, stable electrode medium, and high moisture absorption power generation. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the primary objective of this application is to provide a high-wear-resistant moisture-generating core-spun yarn, its preparation method, and its applications. This application utilizes conductive filaments as the inner electrode of the core layer, moisture-modified cotton fibers as the power generation layer, and perforated conductive nonwoven fabric as the outer electrode of the sheath layer, forming a three-layer core-spun yarn. Using conductive filaments and conductive nonwoven fabric as the inner and outer electrodes ensures good conductivity. The moisture-modified cotton fibers, as the power generation layer, provide excellent moisture absorption and power generation performance, especially given the large specific surface area of ​​the fiber structure, which effectively increases moisture absorption. The perforated conductive nonwoven fabric, as the outer electrode, provides excellent wear resistance, and the perforation increases the contact area between the power generation layer and moisture, ultimately resulting in a moisture-generating yarn with good wear resistance, stable electrode medium, and high moisture absorption and power generation.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] In a first aspect, this application provides a high wear-resistant moisture-generating core-spun yarn, the core-spun yarn being composed of an inner electrode, a power generation layer and an outer electrode; the inner electrode is located in the yarn core layer, the power generation layer is located in the middle layer of the yarn, and the outer electrode is located in the yarn sheath layer; the inner electrode is completely covered by the power generation layer, and the power generation layer is covered by the outer electrode, forming a layered structure.

[0008] The internal electrode comprises any one of silver-plated filament, metal wire, or carbon fiber.

[0009] The power generation layer is made of moisture-absorbing modified cotton fiber;

[0010] The external electrode is a conductive nonwoven fabric strip with perforated surface.

[0011] It should be noted that the moisture-generating cored yarn prepared in this application absorbs moisture from the air through the moisture-modified cotton fibers in the power-generating layer. Because the outer surface of the power-generating layer has a large contact area with moisture and blocks some moisture from diffusing inwards, the outer fibers absorb more water molecules, while the inner fibers absorb fewer. These water molecules promote the dissociation of positive and negative ions of different concentrations between the inner and outer materials, creating an ion concentration difference. Driven by this concentration difference, an electric current is generated, thus achieving moisture-generating power. The power output of moisture-generating power is closely related to the hygroscopicity of the power-generating layer; materials with better hygroscopicity generate higher power. Therefore, using micron-sized cotton fibers increases the specific surface area, structurally improving the hygroscopicity of the power-generating layer and thus increasing the power output.

[0012] Preferably, in the core-spun yarn layered structure, the core layer thickness is 5~80μm, the intermediate layer thickness is 30~200μm, and the sheath layer thickness is 50~400μm.

[0013] Preferably, the power generation layer further includes any one of wool fiber, viscose fiber, and bamboo pulp fiber.

[0014] Preferably, the width of the conductive nonwoven fabric strip is 1-2 cm, and the perforation density is 5-20 per cm. 2 The aperture is 0.5~2mm.

[0015] It should be noted that the conductive nonwoven fabric is a commercially available nonwoven fabric with excellent conductivity, prepared through needle punching and hydroentangling processes. The nonwoven fabric is composed of cross-laid conductive fibers with numerous micro-gaps within it. Using the conductive nonwoven fabric as an external electrode serves two purposes: firstly, these numerous micro-gaps act as channels for moisture transmission, allowing moisture to directly enter the yarn and contact the power generation layer; secondly, the cross-laid structure and micro-gaps formed by the disordered conductive fibers better resist external friction, preventing damage to the external electrode due to friction. Furthermore, to improve the contact efficiency between moisture and the power generation layer, perforations are made in the conductive nonwoven fabric to allow moisture to directly enter the yarn, ensuring that the power generation layer absorbs sufficient water molecules and increases power generation.

[0016] Secondly, this application provides a method for preparing a high abrasion-resistant, moisture-generating core-spun yarn, comprising the following steps:

[0017] Using the inner electrode as the core yarn, moisture-absorbing modified cotton fibers are wrapped around the surface of the inner electrode on a friction spinning machine to form a power generation layer, resulting in a composite core yarn. Then, the composite core yarn is fed onto a covering yarn machine, and the outer electrode is wrapped around the surface of the composite core yarn to obtain a high wear-resistant moisture-generating core-spun yarn.

[0018] It should be noted that by completely coating the surface of the inner electrode with moisture-absorbing modified cotton fibers through friction spinning, the problem of short circuit between the inner and outer electrodes can be avoided.

[0019] Preferably, the method for preparing the moisture-absorbing modified cotton fiber is as follows:

[0020] Soak cotton fibers in a 10wt% NaOH solution for 5-10 minutes, then soak them in a 10wt% ethanol solution for 5-10 minutes, and finally dry them at 70-80℃ for 5-10 minutes to obtain dewaxed cotton fibers.

[0021] Mix 10wt% PVA solution with 30wt% PSSA solution and stir at a stirring rate of 500~1000rpm for 10~20min to obtain a pretreatment agent; then soak the dewaxed cotton fiber in the pretreatment agent for 15~30min, take out the cotton fiber and dry it to obtain moisture-absorbing modified cotton fiber.

[0022] It should be noted that cotton fiber is a natural fiber with good moisture absorption, but due to the presence of substances such as cotton wax in raw cotton, it exhibits hydrophobic properties. Therefore, it is necessary to first remove the cotton wax from the cotton fiber through processes such as alkali washing, and then modify the cotton fiber by introducing PVA and PSSA. This not only enhances the moisture absorption of the cotton fiber but also provides ionizing groups, increasing the concentration of ionized ions. By coating the cotton fiber onto the surface of the core yarn using friction spinning technology, the coating density and thickness of the cotton fiber can be controlled by adjusting the spinning parameters, thereby achieving different power generation designs. At the same time, the micron-sized cotton fiber, as a power generation layer, can increase the contact area with moisture and improve moisture absorption performance.

[0023] Preferably, the mass ratio of the 10wt% PVA solution to the 30wt% PSSA solution is (5~10):(15~30).

[0024] Preferably, the spinning parameters of the friction spinning machine are: core yarn tension 1~10cN, yarn output speed 5~20m / min, cotton fiber feeding speed 0.3~1m / min, combing roller speed 2000~4000r / min, and friction roller speed 3000~4500r / min.

[0025] Preferably, the spinning parameters of the covered yarn machine are: composite core yarn feeding speed of 3~15m / min, composite core yarn tension of 0.5~15cN, and outer electrode covering twist of 300~600T / m.

[0026] Thirdly, this application provides an application of a high abrasion-resistant moisture-generating core-spun yarn, which can be used in self-powered wearable devices.

[0027] The beneficial effects of this application are:

[0028] This application reduces the problem of external electrode failure due to wear or detachment by using perforated conductive nonwoven fabric as the external electrode. This is mainly because the fiber structure of the nonwoven fabric is anisotropically interwoven, forming a network of conductive pathways. The external electrode will not fail due to the wear and breakage of a few fibers, thus enhancing the wear resistance of the moisture-generating yarn. Furthermore, there are a large number of tiny gaps between the fibers arranged in the nonwoven fabric, allowing water molecules in the air to directly pass through the gaps and enter the yarn interior, where they are absorbed by the power generation layer. This avoids the problem of poor yarn moisture absorption caused by the encapsulation structure. At the same time, by perforating the conductive nonwoven fabric, the direct contact area between the power generation layer and the air is increased, further improving the moisture absorption performance of the yarn, thereby enhancing the yarn's power generation capacity.

[0029] By using tribospun technology to coat the surface of the inner electrode with moisture-absorbing modified cotton fibers to form a power generation layer, this method can be adjusted to ensure that the moisture-absorbing modified cotton fibers completely coat the inner electrode, avoiding short circuits between the inner and outer electrodes caused by incomplete coating. In addition, the micron-scale fiber structure power generation layer has a larger specific surface area, which enhances the moisture absorption performance of the power generation layer, thereby increasing the power generation capacity.

[0030] While protecting the core structure from wear, the outer electrode retains porous channels that allow water molecules to enter and interact with the core. When using perforated conductive nonwoven fabric strips for wrapping, the pore size and pore density are key parameters affecting the performance of moisture power generation. When the pore size is too large or the pore density is too high, the exposed area of ​​the core increases, making it susceptible to mechanical wear and material failure. Furthermore, the internal power generation layer's excessive moisture absorption weakens the ion concentration gradient, leading to a decrease in output voltage. Conversely, if the spacing is too small, water molecules have difficulty entering the core, limiting the moisture absorption and ionization process of the cotton fibers, also resulting in reduced output performance. This technology optimizes moisture power generation efficiency by controlling the pore size and pore density to allow water molecules to enter the core cotton fibers in a targeted manner. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A flowchart illustrating the preparation method of the first type of high abrasion-resistant moisture-generating core-spun yarn provided in this application.

[0033] Figure 2 The image shows the appearance of the high abrasion-resistant moisture-generating core-spun yarn prepared by the method in Example 1.

[0034] Figure 3 This is a schematic diagram of a voltage and current output testing device for moisture-generating core-spun yarn.

[0035] Figure 4 The voltage output of the moisture-generating core-spun yarn prepared by the method described in Example 2 and Comparative Example 2. Detailed Implementation

[0036] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] The following specific embodiments further illustrate this point:

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides a method for preparing a high abrasion-resistant, moisture-generating core-spun yarn:

[0041] The cotton fibers were soaked in a 10wt% NaOH solution for 8 minutes and then removed. The removed cotton fibers were then soaked in a 10wt% ethanol solution for 8 minutes. The cotton fibers were then removed and dried at 75℃ for 6 minutes to obtain dewaxed cotton fibers.

[0042] A 10wt% PVA solution and a 10wt% PSSA solution were mixed and stirred at 800 rpm for 15 min to obtain a pretreatment agent; then, dewaxed cotton fibers were immersed in the pretreatment agent for 20 min, the cotton fibers were removed and dried to obtain moisture-absorbing modified cotton fibers; the mass ratio of the PVA solution to the PSSA solution was 6:18.

[0043] Using silver-plated nylon filament as the core yarn, the yarn is fed onto a friction spinning machine. The core yarn tension is set to 1 cN and the core yarn feeding speed is 5 m / min. Moisture-absorbing modified cotton fibers are fed into the combing roller at 0.3 m / min. The combing roller speed is set to 2000 r / min and the friction roller speed is set to 3000 r / min. The moisture-absorbing modified cotton fibers are then coated onto the surface of the inner electrode to obtain a composite core yarn.

[0044] The composite core yarn is used as the core yarn and fed onto a covering yarn machine. The core yarn feeding speed is set to 3 m / min, the core yarn tension to 0.5 cN, and the covering twist to 300 T / m. Perforated conductive nonwoven fabric strips are then wrapped around the surface of the composite core yarn to obtain the moisture-generating core-spun yarn described in Example 4. Its appearance is as follows: Figure 2 As shown; the width of the perforated conductive nonwoven fabric strip is 1 cm, and the perforation density is 5 per cm. 2 The aperture is 2mm.

[0045] Example 2

[0046] like Figure 1 As shown, this embodiment provides a method for preparing a high abrasion-resistant, moisture-generating core-spun yarn:

[0047] The cotton fibers were soaked in a 10wt% NaOH solution for 5 minutes and then removed. The removed cotton fibers were then soaked in a 10wt% ethanol solution for 5 minutes. The cotton fibers were then removed and dried at 70℃ for 5 minutes to obtain dewaxed cotton fibers.

[0048] A 10wt% PVA solution and a 10wt% PSSA solution were mixed and stirred at 500 rpm for 10 min to obtain a pretreatment agent; then, dewaxed cotton fibers were immersed in the pretreatment agent for 15 min, the cotton fibers were removed and dried to obtain moisture-absorbing modified cotton fibers; the mass ratio of the PVA solution to the PSSA solution was 5:15.

[0049] Using copper wire as the core yarn, the yarn is fed onto a friction spinning machine. The core yarn tension is set to 5 cN and the core yarn feeding speed is 10 m / min. Moisture-absorbing modified cotton fibers are fed into the combing roller at 0.5 m / min. The combing roller speed is set to 3000 r / min and the friction roller speed is set to 4000 r / min. The moisture-absorbing modified cotton fibers are then coated onto the surface of the inner electrode to obtain a composite core yarn.

[0050] The composite core yarn is used as the core yarn and fed onto a covering yarn machine. The core yarn feeding speed is set to 8 m / min, the core yarn tension to 10 cN, and the covering twist to 450 T / m. Perforated conductive nonwoven fabric strips are then wrapped around the surface of the composite core yarn to obtain the moisture-generating core-spun yarn described in Example 5. The width of the perforated conductive nonwoven fabric strips is 1.5 cm, and the perforation density is 10 per cm. 2 The aperture is 1mm.

[0051] Example 3

[0052] like Figure 1 As shown, this embodiment provides a method for preparing a high abrasion-resistant, moisture-generating core-spun yarn:

[0053] The cotton fibers were soaked in a 10wt% NaOH solution for 10 minutes and then removed. The removed cotton fibers were then soaked in a 10wt% ethanol solution for 10 minutes. The cotton fibers were then removed and dried at 80℃ for 10 minutes to obtain dewaxed cotton fibers.

[0054] A 10 wt% PVA solution and a 10 wt% PSSA solution were mixed and stirred at 1000 rpm for 20 min to obtain a pretreatment agent. Then, dewaxed cotton fibers were immersed in the pretreatment agent for 30 min, removed, and dried to obtain moisture-modified cotton fibers. The mass ratio of the PVA solution to the PSSA solution was 10:30.

[0055] Using the inner electrode as the core yarn, the yarn is fed onto a friction spinning machine. The core yarn tension is set to 10cN and the core yarn feeding speed is 20m / min. Moisture-absorbing modified cotton fibers are fed into the combing roller at 1m / min. The combing roller speed is set to 4000r / min and the friction roller speed is set to 4500r / min. The moisture-absorbing modified cotton fibers are then wrapped around the surface of the inner electrode to obtain a composite core yarn.

[0056] The composite core yarn is used as the core yarn and fed onto a covering yarn machine. The core yarn feeding speed is set to 15 m / min, the core yarn tension to 15 cN, and the covering twist to 600 T / m. A perforated conductive nonwoven fabric strip is then wrapped around the surface of the composite core yarn to obtain the moisture-generating core-spun yarn described in Example 6. The width of the perforated conductive nonwoven fabric strip is 2 cm, and the perforation density is 20 per cm. 2 The aperture is 0.5mm.

[0057] Example 4

[0058] This embodiment provides a method for preparing high abrasion-resistant, moisture-generating core-spun yarn:

[0059] Using the inner electrode as the core yarn, the yarn is fed onto a friction spinning machine. The core yarn tension is set to 10cN and the core yarn feeding speed is 20m / min. Wool fibers are fed into the combing roller at 1m / min. The combing roller speed is set to 4000r / min and the friction roller speed is set to 4500r / min. The wool fibers are then wrapped around the surface of the inner electrode to obtain a composite core yarn.

[0060] The composite core yarn is used as the core yarn and fed onto a covering yarn machine. The core yarn feeding speed is set to 15 m / min, the core yarn tension to 15 cN, and the covering twist to 600 T / m. A perforated conductive nonwoven fabric strip is then wrapped around the surface of the composite core yarn to obtain the moisture-generating core-spun yarn described in Example 6. The width of the perforated conductive nonwoven fabric strip is 2 cm, and the perforation density is 20 per cm. 2 The aperture is 0.5mm.

[0061] Example 5

[0062] This embodiment provides a method for preparing high abrasion-resistant, moisture-generating core-spun yarn:

[0063] Using copper wire as the core yarn, the yarn is fed onto a friction spinning machine. The core yarn tension is set to 5 cN and the core yarn feeding speed is 10 m / min. Viscose fiber is fed into the combing roller at 0.5 m / min. The combing roller speed is set to 3000 r / min and the friction roller speed is set to 4000 r / min. The viscose fiber is then wrapped around the surface of the inner electrode to obtain a composite core yarn.

[0064] The composite core yarn is used as the core yarn and fed onto a covering yarn machine. The core yarn feeding speed is set to 8 m / min, the core yarn tension to 10 cN, and the covering twist to 450 T / m. Perforated conductive nonwoven fabric strips are then wrapped around the surface of the composite core yarn to obtain the moisture-generating core-spun yarn described in Example 5. The width of the perforated conductive nonwoven fabric strips is 1.5 cm, and the perforation density is 10 per cm. 2 The aperture is 1mm.

[0065] Example 6

[0066] This embodiment provides a method for preparing high abrasion-resistant, moisture-generating core-spun yarn:

[0067] Using silver-plated nylon filament as the core yarn, the yarn is fed onto a friction spinning machine. The core yarn tension is set to 1 cN and the core yarn feeding speed is 5 m / min. Bamboo pulp fiber is fed into the combing roller at 0.3 m / min. The combing roller speed is set to 2000 r / min and the friction roller speed is set to 3000 r / min. The bamboo pulp fiber is then coated onto the surface of the inner electrode to obtain a composite core yarn.

[0068] The composite core yarn is used as the core yarn and fed onto a covering yarn machine. The core yarn feeding speed is set to 3 m / min, the core yarn tension to 0.5 cN, and the covering twist to 300 T / m. A perforated conductive nonwoven fabric strip is then wrapped around the surface of the composite core yarn to obtain the moisture-generating core-spun yarn described in Example 4. The perforated conductive nonwoven fabric strip has a width of 1 cm and a perforation density of 5 per cm. 2 The aperture is 2mm.

[0069] Comparative Example 1

[0070] This comparative example provides a high wear-resistant moisture-generating core-spun yarn and its preparation method. Compared with Example 1, the difference is that the conductive nonwoven fabric strip is non-porous, while the other steps are the same as in Example 1, and will not be repeated here.

[0071] The moisture-generating core-spun yarns prepared in Examples 1-6 and Comparative Example 1 were all prepared according to... Figure 3 The yarn sample was assembled as shown, and the highest output voltage at a relative humidity of 60% was measured. The test results are shown in Table 1.

[0072] Table 1. Maximum output voltage of the moisture-generating core-spun yarn prepared in Examples 1-6 and Comparative Example 1

[0073] sample Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Maximum output voltage (V) 0.71 0.80 0.64 0.76 0.72 0.78 0.05

[0074] As can be seen from Table 1, the power generation performance of the moisture-generating core-spun yarns prepared in Examples 1-6 is significantly better than that in Comparative Example 1. This is mainly because Comparative Example 1 uses an unperforated conductive nonwoven fabric strip as the external electrode, which significantly reduces the contact area between the moisture and the internal moisture-absorbing layer. As a result, the humidity gradient in the moisture-absorbing layer decreases, and the voltage output is smaller. Therefore, it can be seen that using perforated conductive nonwoven fabric as the external electrode can significantly improve the power generation performance of the yarn. By optimizing the number of perforations and the perforation diameter, the external electrode structure with the best power generation performance can be obtained.

[0075] Comparative Example 2

[0076] This comparative example provides a high wear-resistant moisture-generating cored yarn and its preparation method. Compared with Example 2, the difference is that the outer electrode is a cotton fabric soaked with carbon nanotubes. The remaining steps are the same as in Example 2, and will not be repeated here.

[0077] The moisture-generating core-spun yarns prepared in Example 2 and Comparative Example 2 were all prepared according to... Figure 3 The yarn sample was assembled as shown, and the output voltage at a relative humidity of 60% was measured after a friction test. The test results are as follows: Figure 4 As shown, the moisture-generating performance of Comparative Example 2 completely failed. This is because it used cotton fabric soaked with carbon nanotubes as the external electrode. After friction, the carbon nanotubes attached to the surface of the cotton fabric fell off, causing the external electrode to fail, thus rendering the moisture-generating function ineffective. Therefore, it can be seen that the moisture-generating yarn prepared in this application has excellent wear resistance.

[0078] In summary, the moisture-generating core-spun yarn described in this application improves the yarn's power generation performance by optimizing the yarn structure. By changing the twist or perforation density of the external electrode, the contact area between moisture and the yarn is controlled, demonstrating that the contact area should not be too large or too small. By reasonably controlling the size of the contact area between moisture and the yarn, the moisture-generating performance of the yarn can be effectively improved.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the claims of this application.

Claims

1. A high abrasion-resistant, moisture-generating core-spun yarn, characterized in that, The core-spun yarn consists of an inner electrode, a power-generating layer, and an outer electrode; the inner electrode is located in the yarn core layer, the power-generating layer is located in the middle layer of the yarn, and the outer electrode is located in the yarn sheath layer; the inner electrode is completely covered by the power-generating layer, and the power-generating layer is covered by the outer electrode, forming a layered structure. The internal electrode comprises any one of silver-plated filament, metal wire, or carbon fiber. The power generation layer is made of moisture-absorbing modified cotton fiber; The external electrode is a conductive nonwoven fabric strip with perforated surface.

2. The high abrasion-resistant moisture-generating core-spun yarn according to claim 1, characterized in that, In the core-spun yarn layered structure, the core layer thickness is 5~80μm, the intermediate layer thickness is 30~200μm, and the sheath layer thickness is 50~400μm.

3. The high abrasion-resistant moisture-generating core-spun yarn according to claim 1, characterized in that, The power generation layer also includes any one of wool fiber, viscose fiber, and bamboo pulp fiber.

4. The high abrasion-resistant moisture-generating core-spun yarn according to claim 1, characterized in that, The conductive nonwoven fabric strip has a width of 1-2 cm and a perforation density of 5-20 per cm. 2 The aperture is 0.5~2mm.

5. A method for preparing a high-abrasion-resistant, moisture-generating core-spun yarn, characterized in that, Includes the following steps: Using the inner electrode as the core yarn, moisture-absorbing modified cotton fibers are wrapped around the surface of the inner electrode on a friction spinning machine to form a power generation layer, resulting in a composite core yarn. Then, the composite core yarn is fed onto a covering yarn machine, and the outer electrode is wrapped around the surface of the composite core yarn to obtain a high wear-resistant moisture-generating core-spun yarn.

6. The method for preparing a high abrasion-resistant moisture-generating core-spun yarn according to claim 5, characterized in that, The method for preparing the moisture-absorbing modified cotton fiber is as follows: Soak cotton fibers in a 10wt% NaOH solution for 5-10 minutes, then soak them in a 10wt% ethanol solution for 5-10 minutes, and finally dry them at 70-80℃ for 5-10 minutes to obtain dewaxed cotton fibers. Mix 10wt% PVA solution with 30wt% PSSA solution and stir at a stirring rate of 500~1000rpm for 10~20min to obtain a pretreatment agent; then soak the dewaxed cotton fiber in the pretreatment agent for 15~30min, take out the cotton fiber and dry it to obtain moisture-absorbing modified cotton fiber.

7. The method for preparing a high abrasion-resistant moisture-generating core-spun yarn according to claim 6, characterized in that, The mass ratio of the 10wt% PVA solution to the 30wt% PSSA solution is (5~10):(15~30).

8. The method for preparing a high abrasion-resistant moisture-generating core-spun yarn according to claim 5, characterized in that, The spinning parameters of the friction spinning machine are: core yarn tension 1~10cN, yarn output speed 5~20m / min, cotton fiber feeding speed 0.3~1m / min, carding roller speed 2000~4000r / min, and friction roller speed 3000~4500r / min.

9. The method for preparing a high abrasion-resistant moisture-generating core-spun yarn according to claim 5, characterized in that, The spinning parameters of the covered yarn machine are as follows: composite core yarn feeding speed is 3~15m / min, composite core yarn tension is 0.5~15cN, and outer electrode covering twist is 300~600T / m.

10. An application of a high abrasion-resistant moisture-generating core-spun yarn, characterized in that, The moisture-generating yarn can be used in self-powered wearable devices.

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