Electroluminescent fiber sensor driven by braided structure friction nanometer generator

Abstract

The invention provides an electroluminescent fiber sensor driven by a braided structure friction nano-generator. The sensor comprises an electroluminescent fiber body and a friction nano generator, the electroluminescent fiber body is formed by adjacent connection of two electroluminescent fibers, each electroluminescent fiber comprises a conductive core and a luminescent dielectric material layer, and the conductive core is coated with the luminescent dielectric material layer; the friction nanometer generator comprises a conductive material layer and a friction material layer, the conductive material layer is formed by alternately weaving a plurality of conductive material strips for collecting negative charges and a plurality of conductive material strips for collecting positive charges in a criss-cross mode, and the friction material layer is formed by alternately weaving a plurality of positive friction material strips and / or a plurality of negative friction material strips in a criss-cross mode. The conductive core of one electroluminescent fiber is electrically connected with a plurality of conductive material strips for collecting negative charges, and the conductive core of the other electroluminescent fiber is electrically connected with a plurality of conductive material strips for collecting positive charges. The sensor utilizes the generated mechanical energy and is self-powered and self-driven without an external power supply.

Description

Technical Field

[0001] The invention relates to the technical field of friction nanogenerator power generation, and in particular to an electroluminescent fiber sensor driven by a friction nanogenerator with a woven structure. Background Art

[0002] Wearable pressure sensors can measure and record physical signals generated by the human body and have attracted increasing attention due to their great potential in a wide range of applications such as personal healthcare, soft robotics, and human-machine interfaces. However, conventional planar pressure sensors are prone to fall off during long-term dynamic movements. Although some efforts have been made to alleviate the above problems by attaching ultrathin planar devices directly to the skin, they usually lead to some disadvantages regarding long-term comfort and safety. Specifically, due to the lack of breathability of polymer film devices, sweat generated during intense exercise cannot be effectively evaporated, resulting in physical discomfort and even rashes in severe cases. In this regard, fiber-shaped pressure sensors are outstanding candidates for the next generation of wearable pressure sensing platforms because they have a one-dimensional structure and can be integrated into breathable and comfortable smart clothing produced by mature textiles. In practical applications, especially in wearable platforms, real-time feedback from pressure sensors is important, which can help people reduce the risk of missing the best treatment time due to injuries caused by external forces. Therefore, it would be a significant advantage if the wearable sensor itself could directly express the force. Visual feedback is considered an ideal module for integration with pressure sensors because photonic and fluorescent signals are the most intuitive and effective ways to convey information.

[0003] Electroluminescent fiber is a new type of optoelectronic material with the characteristics of high brightness, low power, long life and flexibility. It can be widely used in information display, optical communication, biomedicine, security and anti-counterfeiting and other fields. The research and application of electroluminescent fibers have important scientific significance and application value. According to the different luminescent materials and luminescent principles, the electroluminescent system can be roughly divided into polymer electroluminescence (PLED), organic electroluminescence (OLED), quantum dot electroluminescence (QLED) and alternating current electroluminescence (ACEL). The application of electroluminescent devices of different luminescent systems is different. Among them, the inorganic alternating current electroluminescent system has significant advantages in the preparation of flexible electroluminescent devices because of its advantages such as easy storage of luminescent materials, simple preparation process and low cost.

[0004] In recent years, with the construction of the Internet of Things (IOT) and the rapid development of wearable smart electronic devices and personal portable electronic devices, in addition to meeting the demand for large energy sources, it is also necessary to meet the demand for portable mobile electronic devices. At present, the main way to supply energy for such micro-electronic devices is to store the electric energy generated by traditional power generation methods in batteries or capacitors to provide them with energy. However, on the one hand, it increases the volume and mass of electronic devices, and on the other hand, there are problems of cost, environmental protection and limited usage scenarios. These defects greatly limit the development of large-scale sensor networks and flexible wearable electronic devices. Therefore, it is urgent to find sustainable self-powered energy to power portable electronic products. The development of self-driven electronic devices can not only greatly broaden their scope of application, but also reduce the overall volume and weight of the equipment, and meet the requirements of micro-devices for comfort and durability. Since 2012, a mechanical energy-electric energy conversion device called a triboelectric nanogenerator (TENG) has been widely developed. The emergence of TENG provides a new way of energy supply. It can be used as an energy collector to obtain energy from the living environment, especially the energy of human movement and mechanical vibration that is often ignored or underutilized. It has the advantages of light weight, miniaturization, flexibility, environmental friendliness and low manufacturing cost. It can realize the passive self-powering function of tiny electronic devices and has broad application prospects in the micro-energy collection in the wearable field. The collection and utilization of weak energy in life fills the gap in traditional generator technology and has important strategic significance today when the energy crisis is becoming increasingly serious.

[0005] It will be of great significance to apply triboelectric nanogenerators to wearable sensors made of electroluminescent fibers to achieve self-generating performance of wearable sensors and no longer rely on traditional external power supply equipment. Summary of the invention

[0006] The present invention aims to solve one of the technical problems in the prior art at least to a certain extent. To this end, one object of the present invention is to provide an electroluminescent fiber sensor driven by a triboelectric nanogenerator with a woven structure.

[0007] Although a generator using a single electroluminescent fiber combined with the existing traditional single-electrode working mode, including a stacked conductive layer and a friction nano-electricity generation material layer, can achieve visual sensing, that is, the skin is used as a counter electrode. When the skin is not in contact with the light-emitting layer on the surface of the friction nano-electricity generation material, the fiber does not emit light. After the skin contacts the surface of the friction nano-electricity generation material, the fiber will emit light at the corresponding contact position. The greater the pressure applied at the contact position, the greater the light intensity, thereby achieving visual pressure sensing. However, the power generation device of the above structure has high requirements for external mechanical energy and can only collect mechanical energy generated perpendicular to the friction layer. If the mechanical energy provided by the outside world is small, the device has weak energy collection and cannot achieve visual sensing. Or in some specific scenarios, the electroluminescent fiber needs to be continuously lit, which cannot be achieved by the above structure, resulting in limitations on application scenarios.

[0008] In view of this, in the first aspect of the present invention, the present invention proposes an electroluminescent fiber sensor driven by a woven structure friction nanogenerator. Figure 1 and Figure 2 , sensors include: An electroluminescent fiber body 100, wherein the electroluminescent fiber body 100 is formed by two adjacent electroluminescent fibers, wherein the electroluminescent fiber comprises a conductive core 110 and a luminescent dielectric material layer 120, wherein the luminescent dielectric material layer 120 covers the conductive core 110; The friction nanogenerator 200 comprises a conductive material layer 210 and a friction material layer 220. The conductive material layer 210 is formed by weaving a plurality of conductive material strips for collecting negative charges and a plurality of conductive material strips for collecting positive charges alternately and crosswise. The friction material layer 220 is formed by weaving a plurality of positive friction material strips 221 and a plurality of negative friction material strips 222 alternately and crosswise. The conductive core 110 of one electroluminescent fiber is electrically connected to the plurality of conductive material strips for collecting negative charges, and the conductive core 110 of another electroluminescent fiber is electrically connected to the plurality of conductive material strips for collecting positive charges.

[0009] The inventors found that by forming the above-mentioned woven conductive material layer 210 and friction material layer 220, and combining the device with the structure of the electroluminescent fiber body 100 formed by two adjacent electroluminescent fibers, it has a larger contact area and is more excellent in combination with clothing. It can collect the mechanical energy generated by the body in an all-round way and convert it into electrical energy to the greatest extent. Specifically, the two adjacent electroluminescent fibers can make the electroluminescent fiber sensor better utilize the alternating electric field generated by the friction nanogenerator, thereby stimulating the generation of electroluminescence. Therefore, without using an external power supply, not only pressure sensing can be achieved, but also continuous luminescence of the sensor can be achieved, truly realizing the self-powered and self-driven use of the mechanical energy generated daily without an external power supply. The sensor has excellent independence, stability and reliability, which broadens the application of electroluminescent fiber friction nanogenerator sensors. The entire sensor can be perfectly combined with clothing in the form of weaving and sewing to achieve pattern display, pressure sensing, and liquid sensing.

[0010] It should be noted that the above-mentioned “adjacent” includes two electroluminescent fibers being parallel to each other and being entangled with each other (e.g. Figure 1 The present application does not specifically limit the adjacency method.

[0011] In some embodiments of the present invention, reference Figure 3 The light-emitting dielectric material layer 120 further includes an electroluminescent layer 122 and a dielectric layer 121 . The dielectric layer 121 covers the conductive core 110 , and the electroluminescent layer 122 covers the dielectric layer 121 .

[0012] It should be noted that the material used for the conductive core is a conventional material in the art, such as but not limited to one of metal wires, carbon fibers, metal-particle-plated chemical fibers, ion gel fibers, conductive polymer fibers and conductive composite fibers.

[0013] As an example, the dielectric layer includes a polymer matrix and a dielectric material dispersed inside the polymer, and the electroluminescent layer includes a polymer matrix and an electroluminescent powder dispersed inside the polymer. The dielectric material and the electroluminescent powder are conventional materials in the field, and those skilled in the art can select them according to actual conditions. For example, the dielectric material includes but is not limited to barium titanate, aluminum oxide, magnesium oxide, barium oxide, and silicon dioxide; the electroluminescent powder includes but is not limited to zinc sulfide powder doped with doping elements, and the doping elements are one or more of Cu, Al, Mn, Cl, Ag, and Cd; the polymer matrix includes but is not limited to polydimethylsiloxane, silicone rubber, polyurethane, polyamide, polyvinyl alcohol, and polyacrylonitrile.

[0014] In some embodiments of the present invention, the mass content of the electroluminescent powder in the electroluminescent layer is 40-75%.

[0015] In some embodiments of the present invention, the diameter of the conductive core is 0.2-0.6 mm, and the thickness of the electroluminescent layer is 0.1-0.5 mm.

[0016] In some embodiments of the present invention, the preparation method of the above-mentioned electroluminescent fiber includes: (1) mixing electroluminescent powder and polymer matrix to obtain electroluminescent layer slurry; mixing dielectric material and polymer matrix to obtain dielectric layer slurry; (2) loading the dielectric layer slurry prepared in step (1) onto the surface of the bottom electrode fiber by dip coating, and heating and curing; (3) loading the electroluminescent layer slurry onto the surface of the dielectric layer prepared in step (2) by dip coating, and heating and curing.

[0017] In some embodiments of the present invention, the conductive material layer 210 is made of copper foil or aluminum foil.

[0018] In some embodiments of the present invention, the material used for the positive friction material strip 221 includes, but is not limited to, nylon, silk, fur, cotton, polyoxymethylene and polymer-based composite materials.

[0019] In some embodiments of the present invention, the material used for the negative friction material strip 222 includes, but is not limited to, polydimethylsiloxane, polytetrafluoroethylene, silica gel, polyimide and polymer-based composite materials.

[0020] In some embodiments of the present invention, reference Figure 4 The friction material layer 220 includes a first friction material layer 10 and a second friction material layer 20. The first friction material layer 10 is formed by alternately weaving a plurality of positive friction material strips 221 and a plurality of negative friction material strips 222 to form a pattern of a plurality of positive friction material blocks and negative friction material blocks distributed at intervals. The second friction material layer 20 is woven in the same manner as the first friction material layer 10, and the positive friction material blocks formed by the second friction material layer 20 correspond to the negative friction material blocks of the first friction material layer 10, and the negative friction material blocks formed by the second friction material layer 20 correspond to the positive friction material blocks of the first friction material layer 10. The first friction material layer 10 or the second friction material layer 20 is stacked with the conductive material layer 210.

[0021] In some embodiments of the present invention, Figure 4 The sensor shown is applicable in the following manner: a conductive material layer 210 stacked with a first friction material layer 10 is disposed on one portion of the fabric (e.g., on the fabric on the side of the body), and a second friction material layer 20 is disposed on another portion of the fabric corresponding to the above-mentioned fabric position (on the fabric on the inner side of the elbow). In this way, when the body moves, the first friction material layer 10 and the second friction material layer 20 are in contact to generate electrical energy, which is then collected by the conductive material layer 210 and transmitted to the electroluminescent fiber body 100 to achieve luminescence.

[0022] In some embodiments of the present invention, reference Figure 5 The friction material layer 220 includes a third friction material layer 30 and a fourth friction material layer 40. The third friction material layer 30 is formed by weaving a plurality of positive friction material strips 221 and a plurality of negative friction material strips 222 at unequal intervals and in a criss-cross pattern. The fourth friction material layer 40 is formed by weaving a plurality of positive friction material strips 221 and a plurality of negative friction material strips 222 at unequal intervals and in a criss-cross pattern to form a pattern of a plurality of spaced positive friction material unequal side blocks and negative friction material unequal side blocks. The fourth friction material layer 40 is woven in the same manner as the third friction material layer 30, and the positive friction material unequal side blocks formed by the fourth friction material layer 40 correspond to the negative friction material unequal side blocks of the third friction material layer 30, and the negative friction material unequal side blocks formed by the fourth friction material layer 40 correspond to the positive friction material unequal side blocks of the third friction material layer 30. The third friction material layer 30 or the fourth friction material layer 40 is stacked with the conductive material layer 210.

[0023] In some embodiments of the present invention, Figure 5 The sensor shown is applicable in the following manner: a conductive material layer 210 laminated with a third friction material layer 30 is disposed on one portion of the fabric (e.g., on the fabric on the side of the body), and a fourth friction material layer 40 is disposed on another portion of the fabric corresponding to the above-mentioned fabric position (on the fabric on the inner side of the elbow). In this way, when the body moves, the third friction material layer 30 and the fourth friction material layer 40 are in contact to generate electrical energy, which is then collected by the conductive material layer 210 and transmitted to the electroluminescent fiber body 100 to achieve luminescence.

[0024] In some embodiments of the present invention, reference Figure 6 The friction material layer 220 includes a fifth friction material layer 50 and a sixth friction material layer 60. The fifth friction material layer 50 is formed by alternately weaving a plurality of positive friction material strips 221 and a plurality of negative friction material strips 222 to form a pattern of a plurality of positive friction material strips and negative friction material strips distributed at intervals. The sixth friction material layer 60 is woven in the same manner as the fifth friction material layer 50, and the positive friction material strips formed by the sixth friction material layer 60 correspond to the negative friction material strips of the fifth friction material layer 50, and the negative friction material strips formed by the sixth friction material layer 60 correspond to the positive friction material strips of the fifth friction material layer 50. The fifth friction material layer 50 or the sixth friction material layer 60 is stacked with the conductive material layer 210.

[0025] In some embodiments of the present invention, Figure 6The sensor shown is applicable in the following manner: a conductive material layer 210 stacked with a fifth friction material layer 50 is disposed on one portion of the fabric (e.g., on the fabric on the side of the body), and a sixth friction material layer 60 is disposed on another portion of the fabric corresponding to the above-mentioned fabric position (on the fabric on the inner side of the elbow). In this way, when the body moves, the fifth friction material layer 50 and the sixth friction material layer 60 are in contact to generate electrical energy, which is then collected by the conductive material layer 210 and transmitted to the electroluminescent fiber body 100 to achieve luminescence.

[0026] In some embodiments of the present invention, reference Figure 7 The friction material layer 220 is obtained by alternately weaving a plurality of positive friction material strips 221 and a plurality of negative friction material strips 222 to form a pattern of a plurality of spaced positive friction material blocks and negative friction material blocks. The friction material layer 220 is not stacked with the conductive material layer 210.

[0027] In some embodiments of the present invention, Figure 7 The sensor shown is applicable in the following manner: the conductive material layer 210 is disposed on one portion of the fabric (e.g., on the fabric on the side of the body), and the friction material layer 220 is disposed on another portion of the fabric corresponding to the above-mentioned fabric position (on the fabric on the inner side of the elbow). In this way, when the body moves, the friction material layer 220 will generate electric charge during the movement. When the conductive material layer 210 and the friction material layer 220 are in contact, the electric charge is transferred to the conductive material layer 210 to generate electric energy, and the electric energy is then collected by the conductive material layer 210 and transferred to the electroluminescent fiber body 100 to realize luminescence.

[0028] In some embodiments of the present invention, the working mode of the electroluminescent fiber sensor driven by the braided structure friction nanogenerator includes at least one of sliding power generation and contact separation power generation.

[0029] As an example, the principle of sliding power generation is as follows Figure 8 shown.

[0030] As an example, the principle of contact separation power generation is as follows Fig. 9 shown.

[0031] In some embodiments of the present invention, the electroluminescent fiber sensor driven by the braided structure friction nanogenerator can be applied to visualized pressure sensing or electroluminescent pattern display.

[0032] The visualized pressure sensor of the present application generates mechanical energy by applying a certain pressure to the friction material layer, which is converted into electrical energy and then transmitted to the electroluminescent fiber to emit light to realize visualized sensing.

[0033] The electroluminescent pattern of the present application shows that various personalized patterns can be formed by utilizing the flexibility and excellent weavability of the fiber, such as Fig.10 As shown in the figure, by using TENG to collect the mechanical energy generated by body movement, the "caution!" on the chest can continue to glow without an external power supply, which has broad application prospects in emergency safety, personalized display, etc.

[0034] In some embodiments of the present invention, Fig.11 As shown, the electroluminescent fiber sensor driven by the braided friction nanogenerator can also be applied to liquid sensing, and the two electroluminescent fibers of the electroluminescent fiber body are not in contact, and there is liquid between the two electroluminescent fibers. Specifically, when the two electroluminescent fibers are not combined in a twisted form, but are arranged at a distance, at this time, due to the dissipation of the electric field strength by the air medium between the two fibers, even if an AC electric field is applied to the two fibers, they cannot emit light. However, by utilizing the liquid bridge effect, the electric field between the two fibers can be conducted through the liquid to achieve light emission, and the light emission intensity of the fiber is different according to the different conductivity of the liquid. Therefore, liquid sensing can be achieved based on this principle.

[0035] In some embodiments of the present invention, the distance between the two electroluminescent fibers is 1 mm to 10 cm.

[0036] In some embodiments of the present invention, the liquid includes but is not limited to water, alcoholic organic solvents, saline solutions, carbonated beverages, alcoholic beverages, and the like.

[0037] In the second aspect of the present invention, a fabric is provided. According to an embodiment of the present invention, the fabric includes an electroluminescent fiber sensor driven by the above-mentioned woven structure friction nanogenerator. As a result, the fabric does not rely on an external power supply, but relies on mechanical energy to generate power, thereby achieving self-luminescence, self-power supply, and self-driving.

[0038] The present invention has at least the following technical effects: The present invention combines functional fibers with friction nanogenerator devices, and uses the alternating electric field generated by the friction nanogenerator to drive the operation of the electroluminescent fiber, thereby achieving self-driven sensing without a power source. The low voltage and low charge density of ordinary TENG are not sufficient to drive its continuous operation. Through the design of the weaving structure, the friction nanogenerator can operate in two working modes: sliding and contact separation, and collect the mechanical energy generated by body movement in all directions. In this way, the friction nanogenerator is connected to the electroluminescent fiber, truly realizing self-power and self-driving without an external power source by utilizing the mechanical energy generated daily. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 is a schematic structural diagram of an electroluminescent fiber sensor driven by a woven structure friction nanogenerator according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of an electroluminescent fiber according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of an electroluminescent fiber according to another embodiment of the present invention; Figure 4 is a schematic structural diagram of a friction nanogenerator according to an embodiment of the present invention; Figure 5 is a schematic structural diagram of a friction nanogenerator according to another embodiment of the present invention; Figure 6 is a structural schematic diagram of a friction nanogenerator according to another embodiment of the present invention; Figure 7 is a structural schematic diagram of a friction nanogenerator according to another embodiment of the present invention; Figure 8 is a schematic diagram of sliding power generation of a friction nanogenerator according to an embodiment of the present invention; Fig. 9 is a schematic diagram of contact-separation power generation of a friction nanogenerator according to an embodiment of the present invention; Fig.10 This is an example diagram showing an electroluminescent pattern of an electroluminescent fiber sensor driven by a woven structure friction nanogenerator according to an embodiment of the present invention; Fig.11 This is a display diagram of the electroluminescent fiber sensor driven by the braided structure friction nanogenerator of an embodiment of the present invention, showing light display, pressure sensing and liquid sensing; Fig.12 This is a real application picture of the electroluminescent fiber sensor driven by the braided structure friction nanogenerator of Example 1 of the present invention; Fig.13 is a schematic structural diagram of a sensor of Comparative Example 1 of the present invention; Fig.14 This is a diagram of a performance device for testing an electroluminescent fiber sensor driven by a triboelectric nanogenerator with a woven structure according to the present invention; Fig.15 It is a test result diagram of the electroluminescent fiber sensor driven by the friction nanogenerator of Examples 1-4 of the present invention and Comparative Example 1. DETAILED DESCRIPTION

[0041] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is described below with reference to specific embodiments. It should be noted that these embodiments are merely illustrative and do not limit the present invention in any way.

[0042] Example 1

[0043] (1) Prepare electroluminescent / dielectric composite slurry. At room temperature (25°C), add 3g of copper-doped commercial zinc sulfide luminescent powder, 2g of nano-barium titanate, 2.5g of PDMS and 0.25g of curing agent into a beaker and disperse them evenly for 15 minutes with a stirring speed of 300rpm.

[0044] (2) Preparation of single-electrode electroluminescent sensing fiber. Dip the silver / nylon conductive fiber in the composite slurry for 2 min, hang it in an oven, and cure it at 80 °C for 30 min. Figure 2 The structure shown.

[0045] (3) Preparation of friction nanogenerators: 30 wt% barium titanate and 5 wt% sodium carbonate particles were mixed into PDMS material by physical mixing method, and 1500 mesh silicon carbide sandpaper was used as an imprinting template to cast the material on the sandpaper and heat-cured at 100 degrees Celsius for one hour to give it a surface microstructure. Subsequently, the cured composite film was immersed in deionized water for one day by sacrificial template method to prepare a PDMS / BTO composite friction layer material with surface microstructure and internal porous structure. Commercial double-sided conductive copper foil tape was adhered to the PDMS / BTO composite negative friction layer material and a wire was led out as a negative friction material. A conductive copper foil tape was adhered to the back of nylon and a wire was led out as a positive friction material. The materials were assembled in a cross-woven form. Figure 4 Braided structure friction nanogenerator, the wires are Figure 1 It can work by connecting with the wire fiber inside the luminous fiber. The whole can be combined with clothing in the form of weaving. Setting TENG on the wrist, elbow, waist and other parts where mechanical movement often occurs can collect energy in real time. For details, please refer to the real object Fig.12 The two layers of friction nano-power generation layers are fixed on the clothes at the waist and elbows respectively. The shaking of the elbows drives the friction between the two layers of friction nano-power generation layers, thereby generating sustainable current, which drives the mark "BIGC" on the chest of the clothes to continue to light up.

[0046] Example 2

[0047] The difference between Example 2 and Example 1 is that the weaving method is different. The weaving method used is as follows: Figure 5 shown.

[0048] Example 3

[0049] The difference between Example 3 and Example 1 is that the weaving method is different. The weaving method used is as follows: Figure 6 shown.

[0050] Example 4

[0051] The difference between Example 4 and Example 1 is that the weaving method is different. The weaving method used is as follows: Figure 7 shown.

[0052] Comparative Example 1

[0053] Comparative Example 1 uses a conventional friction nanogenerator structure with a non-woven structure, such as Fig.13 As shown, the positive and negative friction layer materials are consistent with the embodiment, only the structure is different. The positive and negative friction layer materials are cut to the same area size as the embodiment after weaving, and copper foil tapes are attached to the back of each as electrodes and connected to the wires. The positive and negative layer materials are placed opposite to each other.

[0054] The performance of the sensors of the embodiment and the comparative example was tested, and the specific method was as follows: The LINMOT linear motor is used to provide a mechanical force with consistent frequency and pressure, and the two layers of braided TENG are fixed on the following positions: Fig.14 The two sides of the device shown are placed opposite to each other, and an electrometer (Keithley 6517B) is used to measure the voltage, current, and charge output of the TENG.

[0055] The performance test results of the sensors of the embodiments and comparative examples are shown in Fig.15 .

[0056] from Fig.15 It can be seen that in terms of actual power generation effect, the power generation performance of friction nanogenerator devices of the same area using different structures is significantly different. After adopting the woven structure, not only can the electrode be set on one side, which greatly reduces the structural complexity of the overall system, but also significantly improves the power generation performance. The power generation performance of the four woven structures is better than that of the control. Among them, the TENG with a plain alternating woven structure using the structure of Example 1 has achieved the highest in the three evaluation indicators of voltage, current and charge. The power generation voltage can reach 155 volts, the current can reach 22 microamperes, and the charge can reach 40 nanocubic meters, which fully demonstrates the ability and advantages of this structure TENG in driving electroluminescent fibers.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electroluminescent fiber sensor driven by a braided friction nanogenerator, characterized in that: include: An electroluminescent fiber body, wherein the electroluminescent fiber body is formed by two adjacent electroluminescent fibers, wherein the electroluminescent fiber comprises a conductive core and a luminescent dielectric material layer, wherein the luminescent dielectric material layer covers the conductive core; A friction nanogenerator, the friction nanogenerator comprising a conductive material layer and a friction material layer, the conductive material layer being formed by alternately weaving a plurality of conductive material strips for collecting negative charges and a plurality of conductive material strips for collecting positive charges, the friction material layer being formed by alternately weaving a plurality of positive friction material strips and a plurality of negative friction material strips, the conductive core of one electroluminescent fiber being electrically connected to a plurality of conductive material strips for collecting negative charges, and the conductive core of another electroluminescent fiber being electrically connected to a plurality of conductive material strips for collecting positive charges.

2. The sensor according to claim 1, characterized in that: The friction material layer includes a first friction material layer and a second friction material layer. The first friction material layer is formed by weaving a plurality of positive friction material strips and a plurality of negative friction material strips alternately and crosswise to form a pattern of a plurality of positive friction material blocks and negative friction material blocks distributed at intervals. The second friction material layer is woven in the same manner as the first friction material layer, and the positive friction material blocks formed by the second friction material layer correspond to the negative friction material blocks of the first friction material layer, and the negative friction material blocks formed by the second friction material layer correspond to the positive friction material blocks of the first friction material layer. The first friction material layer or the second friction material layer is stacked with the conductive material layer.

3. The sensor according to claim 1, characterized in that: The friction material layer comprises a third friction material layer and a fourth friction material layer, wherein the third friction material layer is formed by weaving a plurality of positive friction material strips and a plurality of negative friction material strips at unequal intervals in a criss-cross pattern, and the fourth friction material layer is formed by weaving a plurality of positive friction material strips and a plurality of negative friction material strips at unequal intervals in a criss-cross pattern to form a pattern of a plurality of spaced-apart positive friction material unequal side blocks and negative friction material unequal side blocks, the fourth friction material layer is woven in the same manner as the third friction material layer, and the positive friction material unequal side blocks formed by the fourth friction material layer correspond to the negative friction material unequal side blocks of the third friction material layer, and the negative friction material unequal side blocks formed by the fourth friction material layer correspond to the positive friction material unequal side blocks of the third friction material layer, and the third friction material layer or the fourth friction material layer is stacked with the conductive material layer. The third friction material layer or the fourth friction material layer is stacked with the conductive material layer.

4. The sensor according to claim 1, characterized in that: The friction material layer includes a fifth friction material layer and a sixth friction material layer. The fifth friction material layer is formed by weaving a plurality of positive friction material strips and a plurality of negative friction material strips alternately and crosswise to form a pattern of a plurality of positive friction material strips and negative friction material strips distributed at intervals. The sixth friction material layer is woven in the same manner as the fifth friction material layer, and the positive friction material strips formed by the sixth friction material layer correspond to the negative friction material strips of the fifth friction material layer, and the negative friction material strips formed by the sixth friction material layer correspond to the positive friction material strips of the fifth friction material layer. The fifth friction material layer or the sixth friction material layer is stacked with the conductive material layer.

5. The sensor according to claim 1, characterized in that: The friction material layer is obtained by alternately weaving a plurality of positive friction material strips and a plurality of negative friction material strips to form a pattern of a plurality of spaced positive friction material blocks and negative friction material blocks. The friction material layer is not stacked with the conductive material layer.

6. The sensor according to any one of claims 1 to 5, characterized in that: The working mode of the electroluminescent fiber sensor driven by the braided structure friction nanogenerator includes at least one of sliding power generation and contact separation power generation.

7. The sensor according to any one of claims 1 to 5, characterized in that: The electroluminescent fiber sensor driven by the braided structure friction nanogenerator can be applied to visualized pressure sensing or electroluminescent pattern display.

8. The sensor according to any one of claims 1 to 5, characterized in that: The electroluminescent fiber sensor driven by the braided structure friction nanogenerator can also be applied to liquid sensing, and the two electroluminescent fibers of the electroluminescent fiber body are not in contact, and there is liquid between the two electroluminescent fibers; And / or, the distance between the two electroluminescent fibers is 1 mm to 10 cm.

9. The sensor according to any one of claims 1 to 5, characterized in that: The light-emitting dielectric material layer further comprises an electroluminescent layer and a dielectric layer, wherein the dielectric layer covers the conductive core, and the electroluminescent layer covers the dielectric layer.

10. A fabric, characterized in that: An electroluminescent fiber sensor driven by a friction nanogenerator having a woven structure as described in any one of claims 1 to 9.

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