Self-powered self-temperature-control heating fabric and preparation method thereof

Abstract

The invention provides a self-powered self-temperature-control heating fabric and a preparation method thereof, and solves the technical problems that a resistance wire in an existing heating fabric needs to depend on an external power supply for heating, the resistance wire is compounded with a fabric, the softness and comfort of the fabric are sacrificed although the fabric is portable, and the thickness is difficult to reduce. The heating fabric comprises a self-powered layer fabric, the self-powered layer fabric is a flocked fabric-based friction nano generator and is provided with fluff and a conductive fabric from top to bottom, and the fluff is longitudinally distributed and connected to the upper surface of the conductive fabric; the invention also provides a preparation method of the self-powered self-temperature-control heating fabric, which comprises the following steps: respectively preparing the self-powered layer fabric, the self-temperature-control heating layer fabric and the heat-conducting layer fabric, and sequentially laminating the self-powered layer fabric, the self-temperature-control heating layer fabric and the heat-conducting layer fabric from top to bottom, thermally bonding and compositely connecting the self-powered layer fabric, the self-temperature-control heating layer fabric and the heat-conducting layer fabric; the fabric can be widely applied to the technical field of heating fabrics.

Description

Technical Field

[0001] The present application relates to the technical field of heating fabrics, and in particular to a self-powered and self-temperature-controlled heating fabric and a preparation method thereof. Background Art

[0002] Since the birth of electric blankets, smart heating fabrics have been committed to exploring lighter, more portable and more efficient heating solutions. They are widely used in medical care, outdoor cold protection, automotive interiors and other fields, such as smart heating sleeping bags, high-performance cold-proof clothing, knee pads and smart car seats, etc., which greatly enhance people's ability to adapt to the changing natural environment.

[0003] Although portable heating products have been developed in the current market, they still have limitations. Traditional smart heating fabrics mostly use low-power resistance wires embedded in the fabrics. On the one hand, the resistance wires need to rely on external power for heating, which is very inconvenient; on the other hand, the resistance wires are mostly fixed on the surface of the fabric in the form of embroidery stitches, forming an S-shaped distribution. After the resistance wires are combined with the fabrics, although they are portable, they sacrifice the softness and comfort of the fabrics, and the thickness is difficult to reduce. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned technology and to provide a self-powered and self-temperature-controlled heating fabric and a preparation method thereof, which does not rely on an external power supply for heating and satisfies user experience such as improving comfort and reducing thickness.

[0005] To this end, the present invention provides a self-powered and self-temperature-controlled heating fabric, the heating fabric comprising a self-powered layer fabric, the self-powered layer fabric is a flocked fabric-based friction nanogenerator, which is provided with fluff and conductive fabric from top to bottom, and the fluff is longitudinally arranged and connected to the upper surface of the conductive fabric.

[0006] Preferably, the thermally conductive fabric is a nickel-plated conductive fabric or a copper-plated conductive fabric.

[0007] Preferably, the fluff is one of nylon fleece, polar fleece, flannel, imitation rabbit fleece, viscose fleece, imported fleece, acrylic fleece and cotton fleece.

[0008] Preferably, the thickness of the conductive fabric is 0.2 mm to 0.5 mm, and the length of the fluff is 0.6 to 5 mm.

[0009] Preferably, the heating fabric also includes a self-controlling temperature heating layer fabric, and the self-power supply layer fabric and the self-controlling temperature heating layer fabric are stacked and connected up and down; the self-controlling temperature heating layer fabric is provided with conductive yarn and a base fabric, the conductive yarn is woven into the base fabric, and the conductive yarn is connected to the conductive fabric through an electrode.

[0010] Preferably, the conductive yarn of the self-temperature-controlled heating layer fabric is one of silver-plated conductive yarn, stainless steel yarn, and graphene yarn.

[0011] Preferably, the silver-plated conductive yarn has a unit length resistivity of 0.1 to 20 Ω / cm, a fineness of 40 to 300 deniers, a breaking strength of 1.5 to 3 cN / dtex, and a breaking elongation of 5% to 20%.

[0012] Preferably, the thickness of the self-temperature-controlled heating layer fabric is 0.3-0.5 mm.

[0013] Preferably, the heating fabric also includes a thermal conductive layer fabric, and the self-powered layer fabric, the self-controlled temperature heating layer fabric, and the thermal conductive layer fabric are stacked and connected in sequence from top to bottom; the thermal conductive layer fabric is woven from a fiber material with a high thermal conductivity coefficient, and the fiber material includes but is not limited to metal fibers, carbon fibers, graphene nanofibers, polymer fibers, and one or more fibers with high thermal conductivity coefficients.

[0014] Preferably, the thickness of the heat-conducting layer fabric is 0.3-1 mm.

[0015] The method for preparing any of the above-mentioned self-powered and self-temperature-controlled heating fabrics, the method for preparing the self-powered layer fabric comprises:

[0016] The electrostatic flocking method is adopted, the conductive fabric is coated with conductive slurry and connected to the negative electrode of a high-voltage electrostatic flocking machine, and the fluff is fed into the high-voltage electrostatic flocking machine. Under the action of the high-voltage electrostatic field, the fluff with the same charge repels each other, and under the action of gravity, falls on the upper surface of the conductive fabric in an upright posture, completing the flocking of the conductive fabric; after the flocked conductive fabric is dried and the floating fluff is cleaned, a flocked fabric-based friction nanogenerator is obtained, that is, a self-powered layer fabric is obtained.

[0017] Preferably, the method for preparing a self-powered and self-temperature-controlled heating fabric comprises the steps of:

[0018] Step S1. Prepare a self-powered layer fabric by electrostatic flocking method for standby use;

[0019] Step S2. preparing a self-controlled temperature heating layer fabric, including: weaving a conductive yarn into a base fabric, installing an electrode on the base fabric, connecting one end of the electrode to the conductive yarn, and connecting the other end of the electrode to the conductive fabric of the self-powered layer fabric obtained in step S1, and setting aside;

[0020] Step S3. Weaving a heat-conducting layer fabric using fibers with high thermal conductivity for later use;

[0021] Step S4. The self-powered layer fabric, the self-temperature-controlled heating layer fabric, and the heat-conducting layer fabric are stacked and thermally bonded from top to bottom to prepare a self-powered and self-temperature-controlled heating fabric.

[0022] The beneficial effects of the present invention are as follows: the present invention provides a self-powered and self-controlled temperature heating fabric and a preparation method thereof, wherein the heating fabric comprises a self-powered layer fabric, which is a flocked fabric-based friction nanogenerator, and is provided with conductive fabric and fluff from top to bottom, and the fluff is longitudinally arranged and connected to the upper surface of the conductive fabric. The self-powered layer fabric is based on the principle of friction nanogenerators, and the prepared flocked fabric-based friction nanogenerator can convert mechanical energy into electrical energy. On the one hand, it does not require the external power supply of the resistance wire in the prior art for heating, and is easy to use; on the other hand, it has good air permeability, moisture permeability and wearing comfort, which satisfies the user experience of improving comfort and reducing thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a structural schematic diagram of an exploded view of the self-powered and self-temperature-controlled heating fabric of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a cross-section of the self-powered and self-temperature-controlled heating fabric of the present invention;

[0026] Figure 3 The electrical output performance of four velvet fabric-based TENGs, where a is the open-circuit voltage and b is the short-circuit current;

[0027] Figure 4 The electrical output performance of polar fleece fabric-based TENG at different contact frequencies, where a is the open-circuit voltage and b is the short-circuit current.

[0028] Markings in the figure: 1. Self-powered layer fabric, 2. Self-controlled temperature heating layer fabric, 3. Heat conductive layer fabric, 4. Fluff, 5. Conductive fabric, 6. Electrode, 7. Conductive yarn, 8. Base fabric. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. The methods used in the present invention are conventional methods unless otherwise specified; the raw materials and devices used are conventional commercial products unless otherwise specified.

[0030] The purpose of the present invention is to provide a self-powered and self-temperature-controlled heating fabric and a preparation method thereof, which does not rely on an external power supply for heating and satisfies user experience such as improving comfort and reducing thickness.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Depend on Figure 1 , Figure 2 As shown, the present invention provides a self-powered and self-temperature-controlled heating fabric, which includes a self-powered layer fabric 1. The self-powered layer fabric 1 is a flocked fabric-based friction nanogenerator, which is provided with fluff 4 and conductive fabric 5 from top to bottom. The fluff 4 is longitudinally arranged and connected to the upper surface of the conductive fabric 5.

[0033] The self-powered layer fabric 1 is based on the principle of friction nanogenerator. The prepared flocked fabric-based friction nanogenerator can convert mechanical energy into electrical energy. On the one hand, it does not require external power supply heating of the resistance wire in the prior art, and is easy to use and carry; on the other hand, there are gaps between the villi 4 and the conductive fabric 5 has pores, so that the entire self-powered layer fabric 1 has good air permeability, moisture permeability and wearing comfort, which helps to regulate body temperature, reduce the accumulation of sweat, and make the human body feel drier and more comfortable, especially under high temperature or exercise conditions, to ensure that the sweat produced by the human body evaporates quickly, maintain the dryness of the skin surface, and avoid the stickiness and discomfort caused by excessive humidity. At the same time, it overcomes the technical defects of the prior art using conductive film materials, such as graphene or metal conductive films, which are soft but have poor air permeability and limited heating range, and are difficult to meet the technical defects of large-area uniform heating, thereby meeting the user experience of improving comfort and reducing thickness.

[0034] In an ideal state, the fluff 4 is evenly arranged vertically and connected to the upper surface of the conductive fabric 5 .

[0035] In some embodiments, the conductive fabric 5 is preferably a nickel-plated conductive fabric or a copper-plated conductive fabric. The fluff 4 is evenly distributed on the surface of the nickel-plated conductive fabric or the copper-plated conductive fabric to obtain a flexible self-powered layer fabric 1, thereby ensuring that the fabric maintains stable electrical properties during deformation such as bending and stretching.

[0036] In some embodiments, the conductive fabric is preferably a knitted fabric. The structure is loose and porous, which further improves its air permeability and moisture permeability, and is better than tight, plain denim, high-density polyester and other fabrics.

[0037] In some embodiments, the fluff 4 is preferably one of nylon fleece, polar fleece, flannel, imitation rabbit fleece, viscose fleece, imported fleece, acrylic fleece, and cotton fleece. The fluff 4 has a loose structure, is conducive to air circulation, and has better air permeability.

[0038] In some embodiments, preferably, the thickness of the conductive fabric 5 is 0.2 mm to 0.5 mm, and the length of the fluff 4 is 0.6 to 5 mm, which further improves the air permeability, moisture permeability and wearing comfort of the self-powered layer fabric 1.

[0039] In some embodiments, the heating fabric also includes a self-controlled temperature heating layer fabric 2. The self-controlled temperature heating layer fabric 2 can be an existing fabric or can be of the following structure: the self-controlled temperature heating layer fabric 2 is provided with a conductive yarn 7 and a base fabric 8. The conductive yarn 7 is woven into the base fabric 8, and the conductive yarn 7 is connected to the conductive fabric 5 through an electrode 6. The self-powered layer fabric 1 and the self-controlled temperature heating layer fabric 2 are stacked and connected up and down. The electric energy generated by the self-powered layer fabric 1 is transferred to the conductive yarn 7 through the conductive fabric 5 and the electrode 6 in the form of an electric current. The resistance of the conductive yarn 7 itself will be converted into heat energy. The base fabric 8 absorbs heat to gradually increase its temperature, which causes the temperature of the self-controlled temperature heating layer fabric 2 to gradually increase.

[0040] In some embodiments, the conductive yarn 7 of the self-controlled temperature heating layer fabric 2 is preferably one of silver-plated conductive yarn, stainless steel yarn, and graphene yarn. There is a unique relationship between the resistance value of the conductive yarn 7 and the temperature, that is, as the temperature of the self-controlled temperature heating layer fabric 2 increases, the resistance value of the conductive yarn 7 inside it will also increase accordingly. When the temperature rises to the threshold, the resistance value of the conductive yarn 7 will reach a peak value, at which time the difficulty of the current passing through the conductive yarn 7 increases significantly, resulting in a significant reduction in the heat generated, until the heating is finally stopped, that is, when the temperature reaches a certain value, the resistance value of the conductive yarn 7 reaches the highest value, so that the self-controlled temperature heating layer fabric 2 stops heating. This process does not require an external temperature controller or a complex circuit, and completely relies on the physical properties of the conductive yarn 7 itself to achieve the automatic adjustment function, thereby ensuring that the heating layer fabric can automatically stabilize at the temperature after reaching the temperature threshold, and realize the automatic adjustment of the heating temperature in the self-controlled temperature heating layer fabric 2, that is, realize the self-controlling temperature function of the heating layer fabric; it not only avoids the potential safety hazards caused by overheating, but also saves energy. In addition, the self-controlling temperature heating layer fabric 2 also has good durability and repeatability, and can maintain stable heating performance and self-controlling function in multiple use cycles, providing unlimited possibilities for application in multiple fields such as clothing, medical treatment, and home furnishing.

[0041] In some embodiments, the conductive yarn 7 of the self-controlled temperature heating layer fabric 2 is preferably a silver-plated conductive yarn 7, whose unit length resistivity is 0.1-20Ω / cm, fineness is 40-300 denier, breaking strength is 1.5-3cN / dtex, and breaking elongation is 5%-20%. The good conductivity of the silver-plated layer and the reasonable design of the yarn weaving structure make the process of converting the resistance of the conductive yarn 7 itself into thermal energy efficient and uniform, and can achieve low driving voltage of 5V, rapid heating within 60s (≥45°C), heating power of 10W, and surface heating characteristics. Under ideal conditions, the conductive yarn 7 is woven into the base fabric 8 to form a uniformly distributed resistance network.

[0042] In some embodiments, the heating fabric also includes a heat-conducting layer fabric 3, which is woven from a fiber material with a high thermal conductivity coefficient, and the fiber material includes but is not limited to one or more of metal fibers, carbon fibers, graphene nanofibers, and polymer fibers, so as to ensure that the heat-conducting layer fabric 3 has a high heat conduction capacity while maintaining basic textile properties such as softness and breathability. The self-powered layer fabric 1, the self-controlled temperature heating layer fabric 2, and the heat-conducting layer fabric 3 are stacked and connected in sequence from top to bottom. The self-controlled temperature heating layer fabric 2 generates heat, and the heat-conducting layer fabric 3 is in contact with the self-controlled temperature heating layer fabric 2. The heat-conducting layer fabric 3 can quickly capture and conduct the heat, and through its internal fiber network structure, the heat is unidirectionally and evenly dissipated in a specific direction, and the heat is dissipated in a preset direction in an efficient and uniform manner. This process not only realizes the directional flow of heat, but also avoids the accumulation of heat inside the fabric or the diffusion of heat in an undesirable direction, thereby ensuring the accuracy and efficiency of heat management, thereby meeting a series of application scenarios with strict requirements for temperature control.

[0043] In addition, the heat-conducting fabric 3 also has good thermal stability, can maintain its thermal conductivity in a wide temperature range, and is not easily invalidated due to changes in ambient temperature. This feature enables the heat-conducting fabric 3 to still work reliably under extreme environmental conditions, such as high-temperature operating environments, aerospace fields, and medical equipment that requires precise temperature control.

[0044] In summary, the heat-conducting layer fabric 3 achieves unidirectional and uniform heat dissipation through its high thermal conductivity fiber and fabric, providing an ideal solution for a variety of scenarios that require efficient thermal management. Its excellent thermal conductivity, thermal stability and good textile properties make the heat-conducting layer fabric 3 play an increasingly important role in modern industry, technology and daily life.

[0045] In some embodiments, preferably, the thickness of the self-temperature-controlled heating layer fabric 2 is 0.3-0.5 mm, and the thickness of the heat-conducting layer fabric 3 is 0.3-1 mm.

[0046] To achieve the above object, the present invention also provides a method for preparing the self-powered and self-temperature-controlled heating fabric described in any one of the above items, comprising the steps of:

[0047] Step S1. Prepare a self-powered layer fabric 1 by an electrostatic flocking method, and set it aside;

[0048] Among them, the preparation method of the self-powered layer fabric 1 includes: using the electrostatic flocking method, applying conductive slurry on the conductive fabric 5 and connecting it to the negative electrode of the high-voltage electrostatic flocking machine, feeding the fluff 4 into the high-voltage electrostatic flocking machine, and under the action of the high-voltage electrostatic field, the fluff 4 with the same charge repel each other, and under the action of gravity, they fall on the upper surface of the conductive fabric 5 in an upright posture, completing the flocking of the conductive fabric 5; after drying and cleaning the floating fluff of the flocked conductive fabric 5, a flocked fabric-based friction nanogenerator is obtained, that is, the self-powered layer fabric 1 is obtained.

[0049] The electrostatic flocking method can be carried out at room temperature; the conductive fabric 5 is preferably a nickel-plated conductive fabric or a copper-plated conductive fabric. The conductive fabric 5 is preferably a knitted fabric. The fluff 4 is preferably one of nylon fleece, polar fleece, flannel, imitation rabbit fleece, viscose fleece, imported fleece, acrylic fleece, and cotton fleece. The thickness of the conductive fabric 5 is preferably 0.2mm to 0.5mm, and the length of the fluff 4 is preferably 0.6 to 5mm; the conductive paste is preferably one of silver conductive paste, graphene conductive paste, and silver palladium resistor paste; the drying temperature is based on the actual production situation to avoid high temperature damage to the fabric, usually controlled below 70°C, or dried at a low temperature of 30 to 48°C.

[0050] Step S2. Use the conductive yarn 7 to weave a self-temperature-controlled heating layer fabric 2 for later use;

[0051] The self-temperature-controlled heating layer fabric 2 can be prepared by an existing fabric preparation method, or by a method in which the conductive yarn 7 is woven into the base fabric 8, and the electrode 6 is installed on the base fabric 8, one end of the electrode 6 is connected to the conductive yarn 7, and the other end of the electrode 6 is connected to the conductive fabric 5 of the self-powered layer fabric 1 obtained in step S1. The conductive yarn 7 of the self-temperature-controlled heating layer fabric 2 can be one of silver-plated conductive yarn, stainless steel yarn, and graphene yarn; wherein the conductive yarn 7 is preferably silver-plated conductive yarn, and its unit length resistivity is 0.1-20Ω / cm, the fineness is 40-300 denier, the breaking strength is 1.5-3cN / dtex, and the breaking elongation is 5%-20%.

[0052] Step S3. Weaving a heat-conducting layer fabric 3 using fibers with high thermal conductivity for later use;

[0053] The heat-conducting layer fabric 3 is woven from a fiber material with a high thermal conductivity, and the fiber material includes but is not limited to one or more of metal fibers, carbon fibers, graphene nanofibers, and polymer fibers.

[0054] Step S4. The self-powered layer fabric 1, the self-temperature-controlled heating layer fabric 2, and the heat-conducting layer fabric 3 are stacked and thermally bonded from top to bottom to prepare a self-powered and self-temperature-controlled heating fabric.

[0055] The thermal bonding and lamination can be carried out by using the existing technology, or by using a thermal transfer machine to heat press at a temperature of 180° C. and a pressure of 10 to 12 MPa for a period of time, for example, 60 seconds, to complete the thermal bonding and lamination.

[0056] Experimental test:

[0057] According to the preparation method of step S1, four self-powered layer fabrics 1, i.e., four velvet fabric-based TENGs, are prepared respectively, namely, polar fleece fabric-based TENG, nylon fleece fabric-based TENG, flannel fabric-based TENG, and imitation rabbit fleece fabric-based TENG. The only difference is that the types of the fluff 4 are polar fleece, nylon fleece, flannel, and imitation rabbit fleece, respectively. Other contents are the same, for example, the length of the fluff 4 is 0.6 mm, the conductive fabrics 5 are all nickel-plated conductive fabrics, the thickness of the conductive fabrics 5 is all 0.2 mm, and the conductive slurry uses graphene conductive slurry, etc.

[0058] (1) The above four types of velvet fabric-based TENGs were tested respectively. The test method was as follows: the electrodes of the above four types of velvet fabric-based TENGs and PTFE membranes were connected with wires, and the electrical output performance of different types of velvet fabric-based TENGs, such as open circuit voltage and short circuit current, was tested by the double-electrode contact separation method. Specifically, a 6514B programmable electrometer was used in an environment with an indoor temperature of 25°C and a relative humidity of 50% to test the open circuit voltage and short circuit current generated by the contact separation of the four types of velvet fabric-based TENGs. The test contact force and test frequency were 5N and 1Hz, respectively. After selecting the TENG with the best electrical output performance, the electrical output performance was tested at a contact force of 5N and a test frequency increased from 0.5Hz to 2Hz to explore the influence of the contact frequency on the electrical output performance, such as open circuit voltage and short circuit current.

[0059] Test results and analysis: Figure 3 As shown in the figure, under the same contact material, contact frequency and contact area, the polar fleece fabric-based TENG has the highest voltage and current, with the instantaneous voltage peak reaching 40V and 300nA. Next is the nylon fleece fabric-based TENG and flannel fabric-based TENG. The weakest electrical output performance is the rabbit fleece fabric-based TENG. The polar fleece fabric-based TENG has the highest electrical output performance among the four types of velvet fabric-based TENGs. Due to its special velvet structure, the friction effect is enhanced. 2 The voltage of the polar fleece fabric-based TENG can reach 40V after friction with PTFE.

[0060] (2) The polar fleece fabric-based TENG was connected to the PTFE membrane through a dual-electrode mode. 2 Under the contact area, contact separation occurs at different frequencies, and the friction power generation performance test is carried out at different contact frequencies to explore the influence of different contact frequencies on electrical output performance such as open circuit voltage and short circuit current.

[0061] Test results and analysis: Figure 4 It can be seen that as the contact frequency increases from 0.5Hz to 2Hz, the voltage peak of the polar fleece fabric-based TENG increases from 15V to about 50V, and the current peak increases from about 100nA to about 200nA, showing an increasing trend. That is, as the contact frequency increases, the voltage and current of the polar fleece fabric-based TENG show an increasing trend, proving that the contact frequency and electrical output are positively correlated.

[0062] In addition, the polar fleece fabric-based TENG has good washability, wearing comfort, air permeability, and working cycle stability. In the dual-electrode working mode, the electrical output performance of multiple polar fleece fabric-based TENGs in series is equivalent to that of a single working unit, and parallel connection can improve the electrical output performance of polar fleece fabric-based TENG.

[0063] The present invention provides a self-powered and self-controlled temperature heating fabric and a preparation method thereof, which innovatively integrates self-power generation technology and intelligent temperature control mechanism, can generate heat autonomously without an external power supply, and automatically adjust the temperature through the built-in intelligent material layer to avoid overheating, thereby realizing true "self-control temperature". Its design takes into account softness, breathability and heating efficiency, bringing unprecedented comfort experience to users. At the material science level, by utilizing the heat transfer characteristics of thermal conductive materials, self-powered and self-controlled temperature fabrics can manage thermal energy more effectively. These thermal conductive materials not only have high thermal conductivity, can quickly and evenly distribute the generated heat to various areas of the fabric, but also can maintain stable thermal conductivity performance under different temperature gradients, ensure the continuity and consistency of heat transfer, and realize the self-powered and self-controlled temperature heating fabrics that integrate large-area heating, high efficiency, and comfortable breathability.

[0064] Moreover, the self-powered layer fabric 1 of the present invention, namely the velvet-surface fabric-based TENG, has good cycle stability, washability, air permeability, and good flexibility, and is expected to achieve continuous production. It can be foreseen that the velvet-surface fabric-based TENG with continuous production potential has good application potential.

[0065] It should be noted that the TENG described in the present invention refers to a friction nanogenerator. PTFE membrane refers to a polytetrafluoroethylene membrane. "High-voltage electrostatic field" and "high thermal conductivity" are recognized as exact meanings in the technical field. In actual production, they can be selected according to actual conditions; preferably, the value of the high-voltage electrostatic field of the present invention is usually between 50 and 60 kV, and the high thermal conductivity is usually above 0.1 W / m·degree.

[0066] In the description of the present invention, it is necessary to understand that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A self-powered and self-temperature-controlled heating fabric, characterized in that: The heating fabric comprises a self-powered layer fabric (1), which is a flocked fabric-based friction nanogenerator and is provided with fluff (4) and a conductive fabric (5) from top to bottom, wherein the fluff (4) is longitudinally arranged and connected to the upper surface of the conductive fabric (5).

2. The self-powered and self-temperature-controlled heating fabric according to claim 1, characterized in that: The conductive fabric (5) is a nickel-plated conductive fabric or a copper-plated conductive fabric.

3. The self-powered and self-temperature-controlled heating fabric according to claim 1, characterized in that: The fluff (4) is one of nylon fleece, polar fleece, flannel, imitation rabbit fleece, viscose fleece, imported fleece, acrylic fleece and cotton fleece.

4. A self-powered and self-temperature-controlled heating fabric according to any one of claims 1 to 3, characterized in that: The heating fabric further comprises a self-controlling temperature heating layer fabric (2), wherein the self-controlling temperature heating layer fabric (1) and the self-controlling temperature heating layer fabric (2) are stacked and connected in an upper and lower layer; the self-controlling temperature heating layer fabric (2) is provided with a conductive yarn (7) and a base fabric (8), wherein the conductive yarn (7) is woven and formed in the base fabric (8), and the conductive yarn (7) is connected to the conductive fabric (5) via an electrode (6).

5. The self-powered and self-temperature-controlled heating fabric according to claim 4, characterized in that: The conductive yarn (7) of the self-temperature-controlled heating layer fabric (2) is one of silver-plated conductive yarn, stainless steel yarn and graphene yarn.

6. The self-powered and self-temperature-controlled heating fabric according to claim 4, characterized in that: The conductive yarn (7) is a silver-plated conductive yarn, with a unit length resistivity of 0.1-20Ω / cm, a fineness of 40-300 deniers, a breaking strength of 1.5-3cN / dtex, and a breaking elongation of 5%-20%.

7. The self-powered and self-temperature-controlled heating fabric according to claim 4, characterized in that: The heating fabric also includes a heat-conducting layer fabric (3), wherein the self-powered layer fabric (1), the self-temperature-controlled heating layer fabric (2), and the heat-conducting layer fabric (3) are sequentially stacked and connected from top to bottom; the heat-conducting layer fabric (3) is woven from a fiber material with a high thermal conductivity, and the fiber material includes but is not limited to one or more of metal fibers, carbon fibers, graphene nanofibers, and polymer fibers.

8. The self-powered and self-temperature-controlled heating fabric according to claim 7, characterized in that: The thickness of the conductive fabric (5) is 0.2 mm to 0.5 mm, and the length of the fluff (4) is 0.6 to 5 mm; the thickness of the self-temperature-controlled heating layer fabric (2) is 0.3 to 0.5 mm; and the thickness of the heat-conducting layer fabric (3) is 0.3 to 1 mm.

9. A method for preparing the self-powered and self-temperature-controlled heating fabric according to any one of claims 1 to 8, characterized in that: The preparation method of the self-powered layer fabric (1) comprises: An electrostatic flocking method is adopted, wherein a conductive slurry is applied to a conductive fabric (5) and then connected to the negative electrode of a high-voltage electrostatic flocking machine, and fluff (4) is fed into the high-voltage electrostatic flocking machine. Under the action of a high-voltage electrostatic field, the fluff (4) with the same charge repel each other and fall on the upper surface of the conductive fabric (5) in an upright posture under the action of gravity, thereby completing the flocking of the conductive fabric (5); after the flocked conductive fabric (5) is dried and the floating fluff is cleaned, the flocked fabric-based friction nanogenerator is obtained, that is, the self-powered layer fabric (1) is obtained.

10. The method according to claim 9, characterized in that Includes steps: Step S1. preparing the self-powered layer fabric (1) by an electrostatic flocking method and setting it aside; Step S2. preparing a self-temperature-controlled heating layer fabric (2), comprising: weaving a conductive yarn (7) into a base fabric (8), installing an electrode (6) on the base fabric (8), connecting one end of the electrode (6) to the conductive yarn (7), and connecting the other end of the electrode (6) to the conductive fabric (5) of the self-powered heating layer fabric (1) obtained in step S1, and setting it aside; Step S3. Weaving a heat-conducting layer fabric (3) using fibers with high thermal conductivity for later use; Step S4. The self-powered layer fabric (1), the self-temperature-controlled heating layer fabric (2), and the heat-conducting layer fabric (3) are stacked and thermally bonded from top to bottom to prepare the self-powered and self-temperature-controlled heating fabric.

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