Preparation methods of triboelectric nanostructured fabrics with different modes and their applications in triboelectric nanostructured fabrics

Abstract

The present invention belongs to the technical field of triboelectric nanogenerators, specifically to methods for preparing triboelectric nanogenerator fabrics with different modes and their applications in the field of triboelectric nanogenerators. The triboelectric nanogenerator fabrics provided by the present invention include three operating modes: contact-separation-sliding triboelectric nanogenerator fabrics, single-electrode triboelectric nanogenerator fabrics, and independent triboelectric triboelectric nanogenerator fabrics. The present invention effectively hides the conductive wire within the composite yarn, effectively preventing wear or breakage of the conductive wire electrodes to ensure that the triboelectric nanogenerator fabric maintains a stable output signal, greatly improving the triboelectric nanogenerator's electrical output performance, such as open-circuit voltage and short-circuit current values. At the same time, the contact-separation-sliding triboelectric nanogenerator fabric can synergize the two operating modes to effectively improve the fabric's electrical output performance, providing an effective reference for new wearable triboelectric nanogenerators and promoting the practical application of flexible triboelectric nanogenerators.

Description

Technical Field

[0001] The present invention belongs to the technical field of friction nanogenerators, and specifically relates to a preparation method of friction nanogenerator fabrics with different modes and their application in the field of friction nanogenerators. Background Art

[0002] In recent years, scientists have continuously explored and developed various clean and renewable energy sources, and the energy consumption structure has expanded from being dominated by coal, oil, and natural gas to a diversified energy structure. Among them, the collection, conversion, storage, and utilization of micro-nano energy are a new generation of clean energy technologies based on micro-nano technologies. The exploration and development of micro-nano energy technologies will promote revolutionary innovations in the efficient utilization of green and renewable energy and provide an important solution to the energy crisis. Due to its many advantages such as high energy density, high conversion efficiency, light weight, wide range of materials, and scalability, triboelectric nanogenerators (TENGs) can convert various forms of mechanical energy in the environment into electrical energy, such as energy from human movement, mechanical vibration, rotational motion, wind energy, raindrop energy, and wave energy. Therefore, triboelectric nanogenerators have become a research hotspot in the field of renewable energy.

[0003] In 2012, Professor Wang Zhonglin's research team first reported on a flexible triboelectric nanogenerator. This device utilizes the principles of triboelectric charging coupled with electrostatic induction to generate triboelectric charges through the contact of two flexible polymer materials with different electronegativity. During the contact and separation process between the two materials, an AC signal is generated in an external circuit, achieving the conversion of mechanical energy into electrical energy. Since then, reports on triboelectric nanogenerators have been numerous, and triboelectric nanogenerators have gradually become a research focus and hotspot that integrates multiple disciplines and technologies, opening up new areas of energy conversion and application. By using triboelectric nanogenerators to extract energy from a variety of mechanical energies, such as biological motion, mechanical vibrations, waves, and airflow, scientists can provide self-powered and self-driven devices for portable electronic terminals, environmental monitoring, medical research, and energy conversion, showing broad application prospects in the future.

[0004] According to the different relative motion directions of the two triboelectric materials, the basic working modes of the triboelectric nanogenerator can be divided into four types (such as Figure 24): vertical contact-separation mode, horizontal sliding friction mode, single electrode mode, independent friction mode; different types of friction nanogenerators can be designed to collect various mechanical energies in the environment to achieve applications under different working conditions. For example, the vertical contact-separation mode is suitable for collecting mechanical energy in the form of slapping, vibration and impact; the horizontal sliding mode is suitable for collecting mechanical energy in the form of sliding, rotation and wave; the single electrode mode is suitable for collecting and applying mechanical energy in environments such as human-computer interaction interfaces, flowing liquids, and rotating wheels; the independent friction mode is suitable for collecting mechanical energy generated in the form of rolling objects on the ground and liquid flow on interfaces. At present, extensive research has been carried out on ocean wave energy collection, electrochemical application systems, and energy collection and storage integrated systems. To continue to further develop friction nanogenerators, it is necessary to conduct in-depth research on their working principles, further expand their scope of application, and enable them to be commercialized, thereby changing the way people obtain energy and truly realizing that technology changes life.

[0005] At present, although friction nanogenerators have achieved remarkable development and progress in recent years, they are still in a slow development state in many aspects such as device design, function expansion and practical application, and need further improvement. For example, the flexible friction nanogenerators reported so far generally use external electrodes, which are easily worn out due to long-term exposure to air, thereby affecting the stability of electrical signal transmission and even reducing the service life of the device. Summary of the Invention

[0006] The purpose of the present invention is to provide a preparation method of friction nano-power generation fabrics of different modes and their application in the field of friction nano-power generation. The friction nano-power generation fabric provided by the present invention can effectively prevent the conductive wire from being damaged by contact with the outside world, while ensuring the stable transmission of electrical signals of the obtained friction nano-power generation device. Moreover, the friction nano-power generation fabric provided by the present invention can realize the coordinated operation of multiple working modes, thereby improving the open circuit voltage and short circuit current values of the friction nano-power generation fabric.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a triboelectric nanostructured power generation fabric, comprising a first fabric and a second fabric; the first fabric and the second fabric are connected by a plurality of positioning stitching points; the triboelectric nanostructured power generation fabric is divided into a plurality of separate friction units by the positioning stitching points; in a natural state, the first fabric and the second fabric in each separate friction unit do not contact each other;

[0009] The first fabric comprises conductive thread @ nylon weft knitted fabric or nylon weft knitted fabric;

[0010] When the first fabric is a conductive wire @ nylon weft knitted fabric, the second fabric is a conductive wire @ polyester weft knitted fabric or a polyester weft knitted fabric;

[0011] When the first fabric is a nylon weft knitted fabric, the second fabric is a conductive wire @ polyester weft knitted fabric;

[0012] The conductive wire @ nylon weft knitted fabric is obtained by weft knitting conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire;

[0013] The conductive wire @ polyester weft knitted fabric is obtained by weft knitting conductive wire @ polyester composite yarn, and the conductive wire @ polyester composite yarn includes a conductive wire and a polyester woven fiber layer coated on the surface of the conductive wire;

[0014] The nylon weft knitted fabric is obtained by weft knitting nylon yarn;

[0015] The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

[0016] The present invention provides a triboelectric nanostructured power generation fabric comprising a third fabric and a fourth fabric stacked in layers;

[0017] The third fabric is a conductive wire @ nylon weft knitted fabric and a polyester weft knitted fabric connected at intervals; the fourth fabric is a polyester weft knitted fabric;

[0018] The conductive wire @ nylon weft knitted fabric is obtained by weft knitting conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire;

[0019] The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

[0020] Preferably, the straight-line distance between two adjacent positioning suture points is 0.5 to 5 cm.

[0021] Preferably, in two adjacent separation friction units, the total length of the first fabric is equal to the total length of the second fabric, and both are greater than twice the straight-line distance between two adjacent positioning stitching points.

[0022] Preferably, the conductive wires are independently carbon-based conductive fibers, stainless steel wires, gold wires, copper wires, silver wires or silver-plated copper wires.

[0023] Preferably, the preparation method of the conductive wire@nylon composite yarn or the conductive wire@polyester composite yarn comprises the following steps:

[0024] A conductive wire is used as a core yarn, and a nylon yarn or a polyester yarn is used as a braiding yarn. A fiber layer is braided on the surface of the conductive wire using a two-dimensional braiding method to obtain the conductive wire@nylon composite yarn or the conductive wire@polyester composite yarn; the diameter of the conductive wire is 0.1 mm; the diameter of the nylon yarn is 0.1-0.14 mm, and the specification of the nylon yarn is 150D / 2 strands or 100D / 2 strands; the diameter of the polyester yarn is 0.1-0.13 mm, and the specification of the polyester yarn is 70D / 2 strands or 120D / 2 strands;

[0025] The parameters of the two-dimensional weaving include: the number of spindles of nylon yarn or polyester yarn is independently 6 to 18; the pulling tension is independently 0.15 to 0.27N; and the weaving speed is 9.5 to 15 mm / min.

[0026] Preferably, the polyester yarn or nylon yarn is made of polyester fiber or nylon fiber, and the preparation method of the polyester fiber or nylon fiber comprises the following steps:

[0027] The polyester masterbatch or nylon masterbatch is melt-spun to obtain the polyester yarn or nylon yarn; the spinning temperature of the melt spinning is independently 150 to 200° C.; the extrusion rate of the melt spinning is independently 600 to 1100 mm·min -1 The fiber drawing temperature of the melt spinning is independently 100 to 160°C; the drawing ratio of the melt spinning is independently 1:1 to 1:3.5.

[0028] The present invention provides a method for preparing the triboelectric nanostructured fabric described in the above technical solution, comprising the following steps:

[0029] The first fabric and the second fabric are positioned and sewn together according to the positioning sewing points to obtain the friction nano power generation fabric.

[0030] Preferably, the positioning suture uses cotton thread as the suture thread, and the seam structure of the positioning suture is flat seam, divided pressure seam, buckle pressure seam, overlap seam or back and forth seam; the stitch of the positioning suture is a single-sided covered chain stitch or a double-sided covered chain stitch, the single-sided covered chain stitch is a three-thread or four-thread single-sided covered chain stitch, and the double-sided covered chain stitch is a four-thread or five-thread double-sided covered chain stitch; the stitch density of the positioning suture is 7 stitches / 2cm to 10 stitches / 2cm; the needle model of the positioning suture is No. 9 to No. 16.

[0031] The present invention provides the use of the friction nano-power generation fabric described in the above technical solution or the friction nano-power generation fabric prepared by the preparation method described in the above technical solution in a friction nano-power generation device.

[0032] The present invention provides a friction nano-power generation fabric, comprising a first fabric and a second fabric; the first fabric and the second fabric are connected by a plurality of positioning stitching points; the friction nano-power generation fabric is divided into a plurality of separated friction units by the positioning stitching points, and in a natural state, the first fabric and the second fabric in each separated friction unit do not contact each other; the first fabric comprises a conductive wire @ nylon weft knitted fabric or a nylon weft knitted fabric; when the first fabric is a conductive wire @ nylon weft knitted fabric, the second fabric is a conductive wire @ polyester weft knitted fabric or a polyester weft knitted fabric; when the first fabric is a nylon weft knitted fabric, The second fabric is a conductive wire @ polyester weft knitted fabric; the conductive wire @ nylon weft knitted fabric is weft knitted from conductive wire @ nylon composite yarn, wherein the conductive wire @ nylon composite yarn includes conductive wire and a nylon braided fiber layer covering the surface of the conductive wire; the conductive wire @ polyester weft knitted fabric is weft knitted from conductive wire @ polyester composite yarn, wherein the conductive wire @ polyester composite yarn includes conductive wire and a polyester braided fiber layer covering the surface of the conductive wire; the nylon weft knitted fabric is weft knitted from nylon yarn; and the polyester weft knitted fabric is weft knitted from polyester yarn. The present invention two-dimensionally weaves a nylon or polyester fiber layer on the surface of the conductive wire, effectively hiding the conductive wire within the composite yarn, effectively preventing wear or breakage of the conductive wire electrode, thereby ensuring that the triboelectric nano-electricity generation fabric maintains a stable output signal while improving the wearing comfort, flexibility, and durability of the device. On the other hand, the friction nano-power generation fabric provided by the present invention connects the positive electrode material and the negative electrode material by positioning the stitching points. By adjusting the structure of the positive and negative electrode fabrics, friction nano-power generation fabrics with different working modes are successfully constructed, realizing the contact separation-contact sliding synergistic mode or single electrode mode, greatly improving the electrical output performance of the friction fabric such as open circuit voltage and short circuit current value.

[0033] Furthermore, the present invention provides a triboelectric nanostructured power generation fabric comprising a third and fourth stacked fabric; the third fabric is a conductive wire @ nylon weft-knitted fabric and a polyester weft-knitted fabric interlaced; the fourth fabric is a polyester weft-knitted fabric; the conductive wire @ nylon weft-knitted fabric is weft-knitted from a conductive wire @ nylon composite yarn, comprising a conductive wire and a nylon braided fiber layer covering the conductive wire; and the polyester weft-knitted fabric is weft-knitted from polyester yarn. Through structural design, the present invention achieves independent frictional action of the triboelectric nanostructured power generation fabric, suitable for independent frictional nanostructured power generation devices.

[0034] In summary, the triboelectric nano-power generation fabric provided by the present invention ensures the excellent electrical output characteristics of the triboelectric nano-power generation device, while making the triboelectric nano-power generation device adaptable to various working conditions and realizing large-scale reliable application.

[0035] The present invention provides a method for preparing the triboelectric nanostructured power generation fabric described in the above technical solution, comprising the steps of: stitching the first and second fabrics together at designated stitching points to produce the triboelectric nanostructured power generation fabric. The present invention utilizes the stitching method and a padded electrode fabric structure to construct contact-separation-sliding and independent friction-type triboelectric nanostructured power generation fabrics. The preparation method is simple and suitable for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart for preparing the triboelectric nanostructured electricity-generating fabric provided by an embodiment of the present invention;

[0037] Figure 2 A flow chart for preparing the conductive wire@nylon composite yarn, the conductive wire@polyester composite yarn, and the polyester yarn provided in an embodiment of the present invention;

[0038] Figure 3 This is a side view of the copper@nylon composite yarn prepared in Example 1 of the present invention;

[0039] Figure 4 The side view and cross-sectional view of the copper@polyester composite yarn prepared in Example 1 of the present invention;

[0040] Figure 5 This is a side view of the polyester yarn prepared in Example 1 of the present invention;

[0041] Figure 6 Schematic diagram of the transition between the relaxed state and the stretched state of the conductive wire @ nylon weft knitted fabric, the conductive wire @ polyester weft knitted fabric, or the polyester weft knitted fabric prepared in an embodiment of the present invention;

[0042] Figure 7 Schematic diagram of the structure and power generation principle of the contact-separation-sliding friction nano-power generation fabric prepared in an embodiment of the present invention;

[0043] Figure 8 This is a physical picture of the contact-separation-sliding friction nano-power generation fabric prepared in Example 1 of the present invention;

[0044] Figure 9 Schematic diagram of the structure and power generation principle of a single-electrode triboelectric nanostructured fabric prepared in an embodiment of the present invention;

[0045] Figure 10 This is a photo of the single-electrode triboelectric nanostructured power generation fabric prepared in Example 1 of the present invention;

[0046] Figure 11 Schematic diagram of the structure and power generation principle of the independent friction-type nano-power generation fabric prepared in an embodiment of the present invention;

[0047] Figure 12 This is a photo of the independent friction-type nano-power generation fabric prepared in Example 1 of the present invention;

[0048] Figure 13 The electrical output performance diagram of the contact-separation-sliding friction nano-electricity generating fabric prepared in Example 1 of the present invention is shown in the figure on the left, which is the voltage diagram, and the figure on the right is the current diagram;

[0049] Figure 14 The electrical output performance diagram of the single-electrode triboelectric nanostructured fabric prepared in Example 1 of the present invention is shown in the figure on the left, which shows the voltage, and the figure on the right shows the current.

[0050] Figure 15 The electrical output performance diagram of the independent friction-type triboelectric nanostructured power generation fabric prepared in Example 1 of the present invention is shown in the figure on the left, which is the voltage diagram, and the figure on the right is the current diagram;

[0051] Figure 16 This is a side view of the copper-plated silver@nylon composite yarn prepared in Example 2 of the present invention;

[0052] Figure 17 Side view of the copper-plated silver@polyester composite yarn prepared in Example 2 of the present invention

[0053] Figure 18 This is a physical picture of the contact-separation-sliding friction nano-power generation fabric prepared in Example 2 of the present invention;

[0054] Figure 19 This is a photo of the single-electrode triboelectric nanostructured electricity generation fabric prepared in Example 2 of the present invention;

[0055] Figure 20 This is a photo of the independent friction-type nano-power generation fabric prepared in Example 2 of the present invention;

[0056] Figure 21 The electrical output performance diagram of the contact-separation-sliding friction nano-electricity generating fabric prepared in Example 2 of the present invention is shown in the figure on the left, which is the voltage diagram, and the figure on the right is the current diagram;

[0057] Figure 22 The electrical output performance diagram of the single-electrode triboelectric nanostructured fabric prepared in Example 2 of the present invention is shown in the figure on the left, which shows the voltage, and the figure on the right shows the current.

[0058] Figure 23 The electrical output performance diagram of the independent friction-type nano-electrical power generation fabric prepared in Example 2 of the present invention is shown in the figure on the left, which is the voltage diagram, and the figure on the right is the current diagram;

[0059] Figure 24 Schematic diagram illustrating the four basic operating modes of the friction nanogenerator in the present invention. DETAILED DESCRIPTION

[0060] The present invention provides a triboelectric nanostructured power generation fabric, comprising a first fabric and a second fabric; the first fabric and the second fabric are connected by a plurality of positioning stitching points; the triboelectric nanostructured power generation fabric is divided into a plurality of separate friction units by the positioning stitching points; in a natural state, the first fabric and the second fabric in each separate friction unit do not contact each other;

[0061] The first fabric comprises conductive thread @ nylon weft knitted fabric or nylon weft knitted fabric;

[0062] The first fabric is a conductive wire @ nylon weft knitted fabric, and the second fabric is a conductive wire @ polyester weft knitted fabric or polyester weft knitted fabric;

[0063] The first fabric is a nylon weft knitted fabric, and the second fabric is a conductive thread @ polyester weft knitted fabric;

[0064] The conductive wire @ nylon weft knitted fabric is obtained by weft knitting conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire;

[0065] The conductive wire @ polyester weft knitted fabric is obtained by weft knitting conductive wire @ polyester composite yarn, and the conductive wire @ polyester composite yarn includes a conductive wire and a polyester woven fiber layer coated on the surface of the conductive wire;

[0066] The nylon weft knitted fabric is obtained by weft knitting nylon yarn;

[0067] The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

[0068] In the present invention, unless otherwise specified, all preparation raw materials / components are commercially available products well known to those skilled in the art.

[0069] The friction nano-power generation fabric provided by the present invention includes a first fabric and a second fabric; when the first fabric and the second fabric are connected by multiple positioning stitching points; when the first fabric is a conductive wire @ nylon weft knitted fabric, the second fabric is a conductive wire @ polyester weft knitted fabric or a polyester weft knitted fabric; when the first fabric is a nylon weft knitted fabric, the second fabric is a conductive wire @ polyester weft knitted fabric.

[0070] In the present invention, the conductive wire @ polyester weft knitted fabric is obtained by weft knitting conductive wire @ polyester composite yarn. The conductive wire @ polyester composite yarn is a core-sheath structure, including a core yarn and a woven fiber layer coated on the surface of the core yarn. The core yarn is a conductive wire, and the woven fiber layer is two-dimensionally woven with polyester yarn as the woven yarn.

[0071] In the present invention, the conductive wire is preferably carbon-based conductive fiber, stainless steel wire, gold wire, copper wire, silver wire or silver-plated copper wire. The diameter of the conductive wire is preferably 0.1 mm.

[0072] In the present invention, the diameter of the polyester yarn is preferably 0.1 to 0.13 mm. In the present invention, the polyester yarn is a single yarn or a ply yarn; the specification of the polyester yarn is preferably 70D / 2 ply or 120D / 2 ply. In the present invention, the polyester yarn is made of polyester fiber; in the present invention, the polyester single yarn is polyester fiber.

[0073] In the present invention, the method for preparing the polyester fiber preferably comprises the following steps:

[0074] The polyester masterbatch is melt-spun to obtain the polyester fiber.

[0075] In the present invention, the melt spinning is preferably carried out in a melt spinning device. The spinning temperature of the melt spinning is preferably 150 to 200°C, more preferably 160 to 180°C; the extrusion rate of the melt spinning is preferably 600 to 1100 mm·min -1 , more preferably 650 to 1000 mm·min -1 The fiber drawing temperature of the melt spinning is preferably 100-160°C, more preferably 120-150°C; the draw ratio of the melt spinning is preferably 1:1-1:3.5. In the present invention, the draw ratio is the ratio of the drawing (second drawing) speed to the drawing (drawing) speed.

[0076] In the present invention, the preparation method of the conductive wire@polyester composite yarn preferably includes the following steps:

[0077] A conductive wire is used as the core yarn and a polyester yarn is used as the braiding yarn. A fiber layer is uniformly woven on the surface of the conductive wire using a two-dimensional weaving method to obtain the conductive wire @ polyester composite yarn. In the present invention, the two-dimensional weaving is preferably performed using a semi-automatic two-dimensional weaving machine. In the present invention, the parameters of the two-dimensional weaving preferably include: the number of spindles of the nylon yarn is preferably 6 to 18, more preferably 10 to 15; the pulling tension is preferably 0.15 to 0.27 N, more preferably 0.18 to 0.25 N; the weaving speed is preferably 9.5 to 15 mm / min, more preferably 10 to 13 mm / min.

[0078] In the present invention, the preparation method of the conductive wire @ polyester weft knitted fabric preferably includes the following steps:

[0079] The conductive wire@polyester composite yarn is weaved into the conductive wire@polyester weft-knitted fabric using a weft knitting method. In the present invention, the weaving is preferably performed in the loop forming area of a weft knitting machine. The weft knitting method preferably includes sequentially performing unwinding, yarn lapping, yarn bending, yarn taping, yarn closing, looping, and knocking off. In the present invention, the resulting knitted fabric is uniformly stretched during the weft knitting process.

[0080] In the present invention, the polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

[0081] In the present invention, the preparation method of the polyester weft-knitted fabric preferably comprises the following steps:

[0082] The polyester yarn is woven into the polyester weft knitted fabric by a weft knitting method. In the present invention, the diameter of the polyester yarn is preferably 0.1 to 0.13 mm. In the present invention, the polyester yarn is a single yarn or a ply yarn; the specification of the polyester yarn is preferably 70D / 2 ply or 120D / 2 ply. In the present invention, the polyester single yarn is a polyester fiber. In the present invention, the preparation method of the polyester fiber is preferably the same as above and will not be described here one by one. In the present invention, the weaving is preferably carried out in the loop forming area of a weft knitting machine, and the weft knitting method preferably includes sequentially performing loop withdrawal, yarn padding, yarn bending, yarn tape, closing, looping, and loop removal. In the present invention, the obtained knitted fabric is uniformly pulled during the weft knitting process.

[0083] In the present invention, the conductive wire @ nylon weft knitted fabric is obtained by weft knitting conductive wire @ nylon composite yarn. The conductive wire @ nylon composite yarn is a core-sheath structure, including a core yarn and a woven fiber layer coated on the surface of the core yarn. The core yarn is a conductive wire, and the woven fiber layer is two-dimensionally woven with nylon yarn as the woven yarn.

[0084] In the present invention, the conductive wire is preferably copper wire, silver wire or silver-plated copper wire, carbon-based conductive fiber, stainless steel wire, gold wire, copper wire, silver wire or silver-plated copper wire. The diameter of the conductive wire is preferably 0.1 mm.

[0085] In the present invention, the diameter of the nylon yarn is preferably 0.1 to 0.14 mm; in the present invention, the nylon yarn is a single yarn or a ply yarn; the specification of the nylon yarn is preferably 150D / 2 ply or 100D / 2 ply. In the present invention, the nylon yarn is made of nylon fiber, and in the present invention, the nylon single yarn is nylon fiber.

[0086] In the present invention, the method for preparing the nylon fiber preferably comprises the following steps:

[0087] The nylon masterbatch is melt-spun to obtain the nylon fiber.

[0088] In the present invention, the melt spinning is preferably carried out in a melt spinning device. The spinning temperature of the melt spinning is preferably 150 to 200°C, more preferably 160 to 180°C; the extrusion rate of the melt spinning is preferably 600 to 1100 mm·min -1 , more preferably 650 to 1000 mm·min -1 The fiber drawing temperature of the melt spinning is preferably 100 to 160°C, more preferably 120 to 150°C; the drawing ratio of the melt spinning is preferably 1:1 to 1:3.5.

[0089] In the present invention, the method for preparing the conductive wire@nylon composite yarn preferably comprises the following steps:

[0090] A conductive wire is used as the core yarn and a nylon yarn is used as the braiding yarn. A fiber layer is uniformly woven on the surface of the conductive wire using a two-dimensional weaving method to obtain the conductive wire @ nylon composite yarn. In the present invention, the two-dimensional weaving is preferably performed using a semi-automatic two-dimensional weaving machine. In the present invention, the parameters of the two-dimensional weaving preferably include: the number of spindles of the nylon yarn is preferably 6 to 18, more preferably 10 to 15; the pulling tension is preferably 0.15 to 0.27 N, more preferably 0.18 to 0.25 N; the weaving speed is preferably 9.5 to 15 mm / min, more preferably 10 to 13 mm / min.

[0091] In the present invention, the preparation method of the conductive wire @ nylon weft knitted fabric preferably includes the following steps:

[0092] The conductive wire@nylon composite yarn is weaved into the conductive wire@nylon weft-knitted fabric using a weft knitting method. In the present invention, the weaving is preferably performed in the loop forming area of a weft knitting machine. The weft knitting method preferably includes sequentially performing unwinding, yarn lapping, yarn bending, yarn taping, yarn closing, looping, and knocking off. In the present invention, the resulting knitted fabric is uniformly stretched during the weft knitting process.

[0093] In the present invention, the nylon weft knitted fabric is obtained by weft knitting nylon yarn.

[0094] In the present invention, the preparation method of the nylon weft knitted fabric preferably comprises the following steps:

[0095] The polyester yarn is woven into the polyester weft knitted fabric by a weft knitting method. In the present invention, the diameter of the nylon yarn is preferably 0.1 to 0.14 mm; in the present invention, the nylon yarn is a single yarn or a ply yarn; the specification of the nylon yarn is preferably 150D / 2 ply or 100D / 2 ply. In the present invention, the nylon single yarn is nylon fiber. In the present invention, the preparation method of the nylon fiber is preferably the same as above and will not be described here one by one. In the present invention, the weaving is preferably carried out in the loop forming area of the weft knitting machine, and the weft knitting method preferably includes sequentially performing loop withdrawal, yarn padding, yarn bending, yarn belting, closing, looping, and loop removal. In the present invention, the obtained knitted fabric is evenly pulled during the weft knitting process.

[0096] In the present invention, when the first fabric and the second fabric are connected by a plurality of positioning stitching points, the friction nano-power generation fabric is divided into a plurality of separate friction units by the positioning stitching points. In a natural state, the first fabric and the second fabric in each separate friction unit do not contact each other.

[0097] In the present invention, the natural state is that the friction nano-power generation fabric is in a relaxed state.

[0098] In the present invention, the straight-line distance between two adjacent positioning suture points is preferably 0.5 to 5 cm, more preferably 1 to 4.5 cm.

[0099] In the present invention, in two adjacent separation friction units, the total length of the first fabric is equal to the total length of the second fabric, and both are greater than twice the straight-line distance between two adjacent positioning stitching points.

[0100] In a specific embodiment of the present invention, in two adjacent separating friction units, when the length of the second fabric in one separating unit is equal to the linear distance between the two adjacent positioning stitching points, the length of the first fabric is greater than the linear distance between the two adjacent positioning stitching points; in the other separating unit, when the length of the second fabric is greater than the linear distance between the two adjacent positioning stitching points, the length of the first fabric is equal to the linear distance between the two adjacent positioning stitching points. The present invention preselects that the first fabric and the second fabric are separated from each other in the separating friction unit by regulating the length, that is, the first fabric and the second fabric do not contact each other.

[0101] The present invention provides a friction nano-electricity generating fabric, comprising a third fabric and a fourth fabric stacked together, wherein the third fabric is a conductive wire material @ nylon weft knitted fabric and a polyester weft knitted fabric connected at intervals; and the fourth fabric is a polyester weft knitted fabric.

[0102] In the present invention, the structure and preparation method of the conductive wire @ nylon weft knitted fabric and polyester weft knitted fabric are preferably the same as above, and will not be repeated here.

[0103] In the present invention, the third fabric is a conductive wire @ nylon weft knitted fabric and a polyester weft knitted fabric connected at intervals; the conductive wire @ nylon weft knitted fabric and the polyester weft knitted fabric are preferably connected by suturing or weft knitting; the suturing connection is that the conductive wire @ nylon weft knitted fabric and the polyester weft knitted fabric are sewn together by cotton thread. The weft knitting connection is that the conductive wire @ nylon composite yarn and the polyester yarn are connected and then weft knitted to obtain the conductive wire @ nylon weft knitted fabric and the polyester weft knitted fabric connected at intervals. The present invention has no special requirements for the specific implementation process of the suturing, and the suturing method familiar to those skilled in the art can be used. In the present invention, the weft knitting method when the conductive wire @ nylon composite yarn and the polyester yarn are weft knitted at intervals is preferably the same as the weft knitting method of the conductive wire @ nylon weft knitted fabric, which will not be described in detail here.

[0104] The friction nano power generation fabric provided by the present invention specifically includes: contact separation-sliding friction nano power generation fabric, single electrode friction nano power generation fabric and independent friction friction nano power generation fabric.

[0105] In the present invention, the contact-separation-sliding friction nano-power generation fabric includes a first fabric and a second fabric, the first fabric is a conductive wire @ nylon weft knitted fabric, and the second fabric is a conductive wire @ polyester weft knitted fabric; the first fabric and the second fabric are connected by a positioning stitching point; the contact-separation-sliding friction nano-power generation fabric is divided into multiple separation friction units by the positioning stitching points, and in a natural state, the first fabric and the second fabric in each separation friction unit do not contact each other.

[0106] In the present invention, Figure 7 As shown, the contact-separation-sliding triboelectric nanogenerator fabric can maintain a relatively separated first and second fabrics in its natural state. An electrical device is then connected to the ends of the fabrics to create a contact-separation-sliding triboelectric nanogenerator. The entire fabric undergoes a transverse stretch-recovery cycle, during which the fabric continuously outputs an electrical signal. This contact-separation-sliding triboelectric nanogenerator fabric can continuously and stably output electrical signals through the synergistic effects of the contact-separation mode and the contact-sliding mode, and can be used to harvest energy generated during the use of a fitness band.

[0107] In the present invention, the single-electrode friction nano-power generation fabric includes a first fabric and a second fabric, the first fabric is a conductive wire @ nylon weft knitted fabric, and the second fabric is a polyester weft knitted fabric; the first fabric and the second fabric are connected by a positioning stitching point; the single-electrode friction nano-power generation fabric is divided into multiple separate friction units by the positioning stitching points, and in a natural state, the first fabric and the second fabric in each separate friction unit do not contact each other.

[0108] In the present invention, Figure 9 As shown, the single-electrode triboelectric nanogenerator is created by separating the two fabrics in their natural state. The end fibers of the conductive nylon knitted fabric are connected to an electrical device and then grounded. The entire fabric is then subjected to a transverse stretch-recovery cycle, which continuously outputs an AC signal, which can be used to harvest energy generated by the cable.

[0109] In the present invention, the independent friction-type friction nano-power generation fabric includes a third fabric and a fourth fabric, the third fabric is a conductive wire @ nylon weft knitted fabric and a polyester weft knitted fabric connected at intervals, the third fabric is a polyester weft knitted fabric, and the third fabric and the fourth fabric are stacked.

[0110] In the present invention, Figure 11 As shown, the independent friction-type triboelectric nanofabric can continuously detect the output electrical signal during the relative motion of the friction pair. Furthermore, it can be used to collect energy generated by friction between the arms and body during running.

[0111] The present invention provides a method for preparing the triboelectric nanostructured fabric described in the above technical solution, comprising the following steps:

[0112] The first fabric and the second fabric are positioned and sewn together according to the positioning sewing points to obtain the friction nano power generation fabric.

[0113] In the present invention, the positioning stitching is preferably staggered positioning stitching, and the staggered positioning stitching is: in adjacent separation friction units, in one separation unit, the length of the first fabric is greater than the length of the second fabric, and in the other adjacent separation unit, the length of the first fabric is less than the length of the second fabric, such as Figure 7 Or as shown in 9.

[0114] In the present invention, the positioning stitching is preferably performed in a flatbed lathe interlock sewing machine.

[0115] In the present invention, the positioning suture uses cotton thread as the suture, and the seam structure of the positioning suture is preferably a flat seam, a divided pressure seam, a buckle pressure seam, a lap seam or a back and forth seam; the stitches of the positioning suture are preferably single-sided covered chain stitches or double-sided covered chain stitches, the single-sided covered chain stitches are preferably three-thread or four-thread single-sided covered chain stitches, and the double-sided covered chain stitches are preferably four-thread or five-thread double-sided covered chain stitches; the stitch density of the positioning suture is preferably 7 stitches / 2cm to 10 stitches / 2cm; the needle model of the positioning suture is preferably No. 9 to No. 16.

[0116] The present invention provides the use of the friction nano-power generation fabric described in the above technical solution or the friction nano-power generation fabric prepared by the preparation method described in the above technical solution in a friction nano-power generation device.

[0117] The present invention preferably connects the friction nano-power generation fabric to an electrical appliance to form a current loop, and then performs a transverse stretch-recovery cycle (such as Figure 7 and Figure 9 As shown) movement, or power generation through relative friction movement.

[0118] In the present invention, the fabric that generates electricity by adopting a transverse stretching-recovery cyclic motion is a contact separation-sliding friction nano power generation fabric or a single electrode friction nano power generation fabric.

[0119] In the present invention, the fabric that uses relative friction motion to achieve power generation is an independent friction-type friction nano-power generation fabric.

[0120] The friction nano-power generation fabric provided by the present invention has a two-dimensional woven nylon or polyester fiber layer on the surface of the conductive wire, which effectively hides the conductive wire in the composite yarn, effectively preventing the conductive wire from being worn or broken, so as to ensure that the friction nano-power generation fabric maintains a stable output signal, while improving the wearing comfort, flexibility and durability of the device.

[0121] The friction nano-power generation fabric (contact separation-sliding friction nano-power generation fabric) provided by the present invention can effectively improve the electrical output performance of the fabric through the synergistic effect of two working modes, providing an effective reference for new wearable friction nano-engines, and is conducive to promoting the practical application of flexible friction nano-generators.

[0122] In order to further illustrate the present invention, the technical solution provided by the present invention is described in detail below with reference to the accompanying drawings and embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0123] Example 1

[0124] according to Figure 1The preparation process is to add nylon masterbatch into the hopper of the melt spinning equipment, and then, at a spinning temperature of 150 ° C and an extrusion speed of 600 mm min -1 , melt spinning was performed under the working parameter conditions of fiber drawing temperature of 100°C and drawing ratio of 1:1 to obtain nylon fiber;

[0125] The polyester masterbatch was added into the hopper of the melt spinning equipment. Then, the spinning temperature was 150℃ and the extrusion speed was 600mm·min. -1 , melt spinning was performed under the working parameter conditions of fiber drawing temperature of 100°C and drawing ratio of 1:1 to obtain polyester fiber;

[0126] according to Figure 1 and Figure 2 The preparation process is as follows: a copper wire with a diameter of 0.1 mm is used as the core yarn, and a nylon yarn with a diameter of 0.1 mm (white and transparent) is used as the braiding yarn. A semi-automatic two-dimensional braiding machine is used to evenly weave the fiber layer on the outside of the copper wire, wherein: the number of spindles used for the nylon yarn is 12 spindles of two-dimensional braided core-spun yarn; according to the selected number of spindles, 12 groups of outer wrapped yarn tubes (with right-angle teeth at the bottom of the tube) are prepared and placed on the yarn carrier; a tension device is placed under the braiding machine, and the core yarn is fed along the axial direction of the final formed yarn after obtaining tension through the tension device; it passes through the center of the track disk and passes through the yarn forming device together with the braiding yarn and is fixed on the extraction mechanism; the braiding speed is set to 14.5 mm / min, the pulling tension is 0.15 N, the machine is turned on to realize the braiding of the core-spun yarn, and finally the copper@nylon composite yarn is woven, as shown in the side view. Figure 3 As shown;

[0127] according to Figure 1 and Figure 2 The preparation process is as follows: a copper wire with a diameter of 0.1 mm is used as the core yarn, and a polyester yarn with a diameter of 0.1 mm (black, 70D / 2 strands) is used as the braiding yarn. A semi-automatic two-dimensional braiding machine is used to evenly weave the fiber layer on the outside of the copper wire, wherein: the number of spindles used for the polyester yarn is 12 spindles of two-dimensional braided core-spun yarn; according to the selected number of spindles, 12 groups of outer wrapped yarn tubes (with right-angle teeth at the bottom of the tube) are prepared and placed on the yarn carrier; a tension device is placed under the braiding machine, and the core yarn is fed along the axial direction of the final formed yarn after obtaining tension through the tension device; it passes through the center of the track disk and passes through the yarn forming device together with the braiding yarn and is fixed on the extraction mechanism; the braiding speed is set to 14.5 mm / min, the pulling tension is 0.15 N, the machine is turned on to realize the braiding of the core-spun yarn, and finally the copper@polyester composite yarn is woven, as shown in the side view and cross-sectional view. Figure 4 As shown;

[0128] according to Figure 1 and Figure 2The preparation process is as follows: polyester yarn (white, 120D / 2 strands) with a diameter of 0.13 mm is two-dimensionally woven using a semi-automatic two-dimensional braiding machine, wherein: the number of spindles used for the polyester yarn is 12 spindles of two-dimensional braided core-spun yarn; according to the selected number of spindles, 12 groups of outer wrapped yarn tubes (with right-angle teeth at the bottom of the tube) are prepared and placed on the yarn carrier; together they pass through the yarn forming device and are fixed on the extraction mechanism; the braiding speed is set to 14.5 mm / min, the machine is turned on to realize the braiding of the polyester yarn, and finally the polyester yarn is woven, as shown in the side view. Figure 5 As shown;

[0129] A single-cylinder latch needle weft circular knitting machine (cylinder diameter: 762 mm, i.e. 30 inches; number of passes: 3 passes / inch cylinder diameter, 90 passes; number of needle passes: 4) was used to deliver copper@nylon composite yarn, copper@polyester composite yarn and polyester yarn to the loop forming area of the weft knitting machine, respectively. The loop forming process was followed: loop withdrawal - yarn padding - closing - looping - yarn bending - loop removal - loop forming - drawing. At the same time, the obtained knitted fabrics were evenly drawn to obtain copper@nylon weft plain knitted fabrics, copper@polyester weft plain knitted fabrics and polyester weft plain knitted fabrics. Each fabric was about 4 cm × 12 cm. The relaxation and stretching states of the fabrics were as follows. Figure 6 shown.

[0130] Example 2

[0131] The straight-line distance between two adjacent positioning suture points was selected to be 5 cm, cotton thread was selected as the suture thread, and the copper@nylon weft plain knitted fabric prepared in Example 1 was used as the first fabric (positive electrode material), and the copper@polyester weft plain knitted fabric prepared in Example 1 was used as the second fabric (negative electrode material) using a flat lathe interlock sewing machine. Figure 7 The structure shown is staggered and spaced, and the stitching parameters include: the seam structure is a flat seam; the stitch is a three-thread or four-thread single-sided covered chain stitch; the stitch density is 7 stitches / 2cm; the machine needle model is No. 9, and the friction nano-electricity generating fabric is recorded as a contact separation-sliding friction nano-electricity generating fabric. The optical photograph is shown in FIG. Figure 8 shown.

[0132] Example 3

[0133] The straight-line distance between two adjacent positioning suture points was selected to be 5 cm, cotton thread was selected as the suture thread, and the copper@nylon weft plain knitted fabric prepared in Example 1 was used as the first fabric (positive electrode material), and the polyester weft plain knitted fabric prepared in Example 1 was used as the second fabric (friction pair material) using a flat lathe interlock sewing machine. Figure 9 The structure shown is staggered and spaced, and the suturing parameters include: the seam structure is a flat seam; the stitch is a three-thread or four-thread single-sided covered chain stitch; the stitch density is 7 stitches / 2cm; the machine needle model is No. 9, and the friction nano-electricity generating fabric is recorded as a single-electrode friction nano-electricity generating fabric. The optical photograph is shown in FIG. Figure 10 As shown;

[0134] Example 4

[0135] Two pieces of copper@nylon weft plain knitted fabrics prepared in Example 1 were separated by a piece of polyester weft plain knitted fabric prepared in Example 1 to form a spacer knitted fabric. Figure 11 The spacer knitted fabric was used as the first fabric and placed on the surface of a piece of polyester plain knitted fabric prepared in Example 1 as the second fabric (friction pair material) to obtain a friction nano-power generation fabric, which was recorded as an independent friction type friction nano-power generation fabric. The optical photograph is shown in FIG. Figure 12 shown.

[0136] Application Example 1

[0137] The positive and negative electrodes of the contact-separation-sliding friction nanogenerator prepared in Example 2 were connected to an electrical device to form a circuit to obtain a friction nanogenerator. The contact-separation-sliding friction nanogenerator was subjected to a transverse stretching-recovery cycle. During this process, the fabric continuously outputs electrical signals, and the electrical output performance is obtained as follows: Figure 13 shown.

[0138] The end fibers of the copper@nylon knitted fabric (positive electrode material) in the single-electrode triboelectric nano-generator fabric prepared in Example 3 were connected to an electrical appliance and then strictly grounded to obtain a single-electrode triboelectric nano-generator loom. The entire single-electrode triboelectric nano-generator fabric was then subjected to a transverse stretch-recovery cycle. During this process, the fabric was able to continuously output an AC signal, and the electrical output performance diagram was obtained as shown in the figure below. Figure 14 shown.

[0139] The two copper@nylon plain knitted fabrics in the spacer knitted fabric of the triboelectric nano-generator fabric prepared in Example 4 were connected to an electrical appliance to form a circuit, and the two overlapping fabrics were subjected to friction cycles in opposite directions, thus obtaining an independent friction-type triboelectric nano-generator loom. During the relative motion of the friction pairs, the electrical appliance continuously detected the output electrical signal, and the electrical output performance diagram was obtained as shown in FIG. Figure 15 shown.

[0140] Example 5

[0141] according to Figure 1 The preparation process is to add nylon masterbatch into the hopper of the melt spinning equipment, and then, at a spinning temperature of 150 ° C and an extrusion speed of 600 mm min -1 , melt spinning was performed under the working parameter conditions of fiber drawing temperature of 100°C and drawing ratio of 1:1 to obtain nylon fiber;

[0142] The polyester masterbatch was added into the hopper of the melt spinning equipment. Then, the spinning temperature was 150℃ and the extrusion speed was 600mm·min.-1 , melt spinning was performed under the working parameter conditions of fiber drawing temperature of 100°C and drawing ratio of 1:1 to obtain polyester fiber;

[0143] according to Figure 1 and Figure 2 The preparation process is as follows: a copper-plated silver wire with a diameter of 0.1 mm is used as the core yarn, and a nylon yarn with a diameter of 0.14 mm (natural white, 150D / 2 strands) is used as the braiding yarn. A semi-automatic two-dimensional braiding machine is used to evenly weave the fiber layer on the outside of the copper-plated silver wire, wherein: the number of spindles used for the nylon yarn is 8 spindles of two-dimensional braided core-spun yarn; according to the selected number of spindles, 8 groups of outer wrapped yarn tubes (with right-angle teeth at the bottom of the tube) are prepared and placed on the yarn carrier; a tension device is placed under the braiding machine, and the core yarn is fed along the axial direction of the final formed yarn after obtaining tension through the tension device; it passes through the center of the track disk and passes through the yarn forming device together with the braiding yarn and is fixed on the extraction mechanism; the braiding speed is set to 15 mm / min, the traction tension is 0.15 N, the machine is turned on to realize the braiding of the core-spun yarn, and finally the copper-plated silver @ nylon composite yarn is woven, as shown in the side view and cross-section. Figure 16 As shown;

[0144] according to Figure 1 and Figure 2 The preparation process is as follows: a copper-plated silver wire with a diameter of 0.1 mm is used as the core yarn, and a polyester yarn with a diameter of 0.13 mm (white, 120D / 2 strands) is used as the braiding yarn. A semi-automatic two-dimensional braiding machine is used to evenly weave the fiber layer on the outside of the copper-plated silver wire, wherein: the number of spindles used for the polyester yarn is 8 spindles of two-dimensional braided core-spun yarn; according to the selected number of spindles, 8 groups of outer wrapped yarn tubes (with right-angle teeth at the bottom of the tube) are prepared and placed on the yarn carrier; a tension device is placed under the braiding machine, and the core yarn is fed along the axial direction of the final formed yarn after obtaining tension through the tension device; it passes through the center of the track disk and passes through the yarn forming device together with the braiding yarn and is fixed on the extraction mechanism; the braiding speed is set to 15 mm / min, the pulling tension is 0.15 N, the machine is turned on to realize the braiding of the core-spun yarn, and finally the copper-plated silver@polyester composite yarn is woven, as shown in the side view and cross-sectional view. Figure 17 As shown;

[0145] according to Figure 1 and Figure 2 The preparation process is as follows: polyester yarn (white, 120D / 2 strands) with a diameter of 0.13 mm is two-dimensionally woven using a semi-automatic two-dimensional braiding machine, wherein: the number of spindles used for the polyester yarn is 8 spindles of two-dimensional braided core-spun yarn; according to the selected number of spindles, 8 sets of outer wrapped yarn tubes (with right-angle teeth at the bottom of the tube) are prepared and placed on a yarn carrier; the tubes are passed through a yarn forming device and fixed on an extraction mechanism; the braiding speed is set to 15 mm / min, the machine is turned on, and the polyester yarn is woven, and finally the polyester yarn is woven;

[0146] A single-cylinder latch needle weft circular knitting machine (cylinder diameter: 762 mm, i.e. 30 inches; number of passes: 3 passes / inch cylinder diameter, 90 passes; number of needle passes: 4) was used to deliver copper-plated silver @ nylon composite yarn, copper-plated silver @ polyester composite yarn and polyester yarn to the loop forming area of the weft knitting machine, respectively. The loop forming process was as follows: loop withdrawal - yarn padding - closing - looping - yarn bending - loop removal - loop forming - drawing. At the same time, the obtained knitted fabrics were evenly drawn to obtain copper-plated silver @ nylon weft plain knitted fabrics, copper-plated silver @ polyester weft plain knitted fabrics and polyester weft plain knitted fabrics. Each fabric was about 4 cm × 12 cm. The relaxation and stretching states of the fabrics were as follows. Figure 6 shown.

[0147] Example 6

[0148] The straight-line distance between two adjacent positioning suture points was set to 5 cm, cotton thread was selected as the suture thread, and the copper-plated silver@nylon weft plain knitted fabric prepared in Example 5 was used as the first fabric (positive electrode material), and the copper-plated silver@polyester weft plain knitted fabric prepared in Example 5 was used as the second fabric (negative electrode material) by a flatbed lathe interlock sewing machine. Figure 7 The structure shown is staggered and spaced, and the stitching parameters include: the seam structure is a flat seam; the stitch is a three-thread or four-thread single-sided covered chain stitch; the stitch density is 7 stitches / 2cm; the machine needle model is No. 9, and the friction nano-electricity generating fabric is recorded as a contact separation-sliding friction nano-electricity generating fabric. The optical photograph is shown in FIG. Figure 18 shown.

[0149] Example 7

[0150] The straight-line distance between two adjacent positioning suture points was set to 5 cm, cotton thread was selected as the suture thread, and the copper-plated silver @ nylon weft plain knitted fabric prepared in Example 5 was used as the first fabric (positive electrode material), and the polyester weft plain knitted fabric prepared in Example 5 was used as the second fabric (friction pair material) by a flat lathe interlock sewing machine. Figure 9 The structure shown is staggered and spaced, and the suturing parameters include: the seam structure is a flat seam; the stitch is a three-thread or four-thread single-sided covered chain stitch; the stitch density is 7 stitches / 2cm; the machine needle model is No. 9, and the friction nano-electricity generating fabric is recorded as a single-electrode friction nano-electricity generating fabric. The optical photograph is shown in FIG. Figure 19 shown.

[0151] Example 8

[0152] Two pieces of copper-plated silver @ nylon plain knitted fabrics prepared in Example 5 were separated by a piece of polyester plain knitted fabric prepared in Example 5 to form a spacer knitted fabric. Figure 11The spacer knitted fabric was used as the first fabric and placed on the surface of a polyester plain knitted fabric prepared in Example 5 as the second fabric (friction pair material) to obtain a friction nano-power generation fabric, which was recorded as an independent friction type friction nano-power generation fabric. The optical photograph is shown in FIG. Figure 20 shown.

[0153] Application Example 2

[0154] The positive and negative electrodes of the contact-separation-sliding friction nanogenerator prepared in Example 6 were connected to an electrical device to form a circuit to obtain a friction nanogenerator. The contact-separation-sliding friction nanogenerator was subjected to a transverse stretch-recovery cycle. During this process, the fabric continuously outputs electrical signals, and the electrical output performance is obtained as follows: Figure 21 shown.

[0155] The end fibers of the copper-plated silver@nylon knitted fabric (positive electrode material) in the single-electrode triboelectric nano-generator fabric prepared in Example 7 were connected to an electrical appliance and then strictly grounded to obtain a single-electrode triboelectric nano-generator loom. The entire single-electrode triboelectric nano-generator fabric was then subjected to a transverse stretch-recovery cycle. During this process, the fabric was able to continuously output an AC signal, and the electrical output performance diagram was obtained as shown in FIG. Figure 22 shown.

[0156] The two copper@nylon weft plain knitted fabrics in the spacer knitted fabric of the triboelectric nano-generator fabric prepared in Example 8 were connected to an electrical appliance to form a circuit, and the two overlapping fabrics were subjected to friction cycles in opposite directions, thus obtaining an independent friction-type triboelectric nano-generator loom. During the relative motion of the friction pairs, the electrical appliance continuously detected the output electrical signal, and the electrical output performance diagram was obtained as shown in FIG. Figure 23 shown.

[0157] Although the above embodiment provides a detailed description of the present invention, it is only a part of the embodiments of the present invention, not all of the embodiments. Other embodiments can be obtained based on this embodiment without creativity, and these embodiments all fall within the scope of protection of the present invention.

Claims

1. A triboelectric nanostructured fabric, characterized in that: The invention comprises a first fabric and a second fabric; the first fabric and the second fabric are connected by a plurality of positioning stitching points; the triboelectric nanostructured power generation fabric is divided into a plurality of separate friction units by the positioning stitching points, and in two adjacent separate friction units, the total length of the first fabric is equal to the total length of the second fabric, and both are greater than twice the straight-line distance between the two adjacent positioning stitching points; In a natural state, the first fabric and the second fabric in each separation friction unit do not contact each other; the straight-line distance between two adjacent positioning stitching points is 0.5 to 5 cm; The first fabric comprises conductive thread @ nylon weft knitted fabric or nylon weft knitted fabric; When the first fabric is a conductive wire @ nylon weft knitted fabric, the second fabric is a polyester weft knitted fabric; When the first fabric is a nylon weft knitted fabric, the second fabric is a conductive wire @ polyester weft knitted fabric; The conductive wire @ nylon weft knitted fabric is obtained by weft knitting conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire; The conductive wire @ polyester weft knitted fabric is obtained by weft knitting conductive wire @ polyester composite yarn, and the conductive wire @ polyester composite yarn includes a conductive wire and a polyester woven fiber layer coated on the surface of the conductive wire; The nylon weft knitted fabric is obtained by weft knitting nylon yarn; The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

2. The triboelectric nanostructured fabric according to claim 1, characterized in that: The preparation method of the conductive wire @ nylon composite yarn or the conductive wire @ polyester composite yarn comprises the following steps: A conductive wire is used as a core yarn, and a nylon yarn or a polyester yarn is used as a braiding yarn. A fiber layer is braided on the surface of the conductive wire using a two-dimensional braiding method to obtain the conductive wire@nylon composite yarn or the conductive wire@polyester composite yarn; the diameter of the conductive wire is 0.1 mm; the diameter of the nylon yarn is 0.1-0.14 mm, and the specification of the nylon yarn is 150D / 2 strands or 100D / 2 strands; the diameter of the polyester yarn is 0.1-0.13 mm, and the specification of the polyester yarn is 70D / 2 strands or 120D / 2 strands; The parameters of the two-dimensional weaving include: the number of spindles of nylon yarn or polyester yarn is independently 6 to 18; the pulling tension is independently 0.15 to 0.27N; and the weaving speed is 9.5 to 15 mm / min.

3. The triboelectric nanostructured fabric according to claim 2, characterized in that: The polyester yarn or nylon yarn is made of polyester fiber or nylon fiber, and the preparation method of the polyester fiber or nylon fiber comprises the following steps: The polyester masterbatch or nylon masterbatch is melt-spun to obtain the polyester yarn or nylon yarn; the spinning temperature of the melt spinning is independently 150 to 200° C.; the extrusion rate of the melt spinning is independently 600 to 1100 mm·min -1 The fiber drawing temperature of the melt spinning is independently 100 to 160°C; the drawing ratio of the melt spinning is independently 1:1 to 1:3.

5.

4. A triboelectric nanostructured fabric, characterized in that: comprising a third fabric and a fourth fabric arranged in a stacked manner; The third fabric is a conductive wire @ nylon weft knitted fabric and a polyester weft knitted fabric connected at intervals; the conductive wire @ nylon weft knitted fabric and the polyester weft knitted fabric are connected at intervals by sewing or weft knitting; the fourth fabric is a polyester weft knitted fabric; The conductive wire @ nylon weft knitted fabric is obtained by weft knitting conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire; The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

5. The triboelectric nanostructured power generation fabric according to claim 1 or 4, characterized in that: The conductive wires are independently carbon-based conductive fibers, stainless steel wires, gold wires, copper wires, silver wires or silver-plated copper wires.

6. The method for preparing the triboelectric nanostructured power generation fabric according to claim 1, wherein: The following steps are involved: The first fabric and the second fabric are positioned and sewn together according to the positioning sewing points to obtain the friction nano power generation fabric.

7. The preparation method according to claim 6, characterized in that The positioning suture uses cotton thread as the suture thread, and the seam structure of the positioning suture is flat seam, divided pressure seam, buckle pressure seam, overlap seam or back and forth seam; the stitch of the positioning suture is a single-sided covered chain stitch or a double-sided covered chain stitch, the single-sided covered chain stitch is a three-thread or four-thread single-sided covered chain stitch, and the double-sided covered chain stitch is a four-thread or five-thread double-sided covered chain stitch; the stitch density of the positioning suture is 7 stitches / 2cm to 10 stitches / 2cm; the needle model of the positioning suture is No. 9 to No.

16.

8. Use of the triboelectric nanostructured power generation fabric according to any one of claims 1 to 5 or the triboelectric nanostructured power generation fabric prepared by the preparation method according to claim 6 or 7 in a triboelectric nanostructured power generation device.

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