A preparation method for a multi-mode coexisting coaxial tubular friction nanogenerator

Abstract

The present invention relates to the field of flexible intelligent wearable power generation and sensing, and specifically is a method for preparing a multi-mode coexistence coaxial tubular friction nanogenerator, comprising the following steps: step one: preparing a compression rebound skeleton; step two: preparing an electrostatic induction electrode; step three: preparing a dielectric electrode; step four: preparing a coaxial electrification electrode; step five: assembling the electrodes obtained in the above step four and step three to make them coaxial and fixed at both ends to obtain a coaxial tubular friction nanogenerator; the working mechanism of the multi-mode coexistence coaxial friction nanogenerator prepared by the method includes a single electrode mode and a contact separation mode, and the electrode in the single electrode mode is woven into a tube using heat-set filaments and is shaped using a heat-setting process to make it have high elasticity and elastic recovery; the heat-set filaments used in the present invention have a skeleton effect, which improves the problems of a one-dimensional linear friction nanogenerator having a small output electrical signal, a short service life, and a low degree of integration with textiles.

Description

Technical Field

[0001] The present invention relates to the field of flexible intelligent wearable power generation and sensing, and specifically to a method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator. Background Art

[0002] As an effective technology to convert human or external mechanical energy into electrical energy, triboelectric nanogenerator (TENG) provides a new method for wearable self-powered sensors. It has the advantages of large output electrical signal, long service life, and high degree of integration with textiles.

[0003] At present, the friction nanogenerator products on the market are mainly two-dimensional plane or three-dimensional devices. The energy supply devices are large in size, not suitable for portable wear, and cannot be combined with textiles. As we all know, there are four working modes of friction nano-power generation, including single electrode mode, contact separation mode, sliding friction mode and independent layer mode, but there are currently no friction nanogenerator products that coexist and work in multiple modes. The single working mode limits the increase in the output power of TENG. Therefore, constructing a tubular, flexible TENG with multiple working modes has become a new hot spot in the smart wearable market.

[0004] This case was created to solve the above problems. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art and solve the problem that the existing friction nanogenerator products cannot have multiple working modes, the present invention proposes a method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a preparation method of a multi-mode coexistence coaxial tubular friction nanogenerator described in the present invention, the preparation method comprises the following steps: step 1: preparing a compression rebound skeleton, winding heat-set filaments of a certain fineness on the spindle of a braiding machine respectively, taking a terpolymer tube of a certain diameter of acrylonitrile-butadiene-styrene, using it as an axis to weave the heat-set filaments on the surface of the tube to form a hollow cylindrical tube, and then using a heat-setting process to shape the polyester tube to obtain a compression rebound heat-set filament skeleton;

[0007] Step 2: Prepare an electrostatic induction electrode, select conductive ink as a conductive coating material, use a coating process to coat the conductive ink on the surface of the polyester tube described in step 1, and heat-dry it to make it adhere to the surface of the tube body, so that the polyester tube is conductive;

[0008] Step 3: Prepare a dielectric electrode, prepare PDMS components A and B by weight, mix the two components in proportion, inject the obtained mixed solution into the conductive coated polyester tube described in step 2 and let it stand, then transfer it to an oven for drying and shaping, and demold and take it out after shaping to obtain a tubular electrode;

[0009] Step 4: prepare a coaxial electrification electrode, wind nylon filaments of a certain fineness on the spindle of a braiding machine, take a conductive metal yarn of a certain fineness, and use it as an axis to weave the nylon filaments on the metal yarn, the metal yarn is the electrostatic induction yarn, and the braided nylon yarn is the electrification yarn;

[0010] Step 5: Assemble the electrodes obtained in the above step 4 and step 3 so that they are coaxial and fixed at both ends to obtain a coaxial tubular friction nanogenerator.

[0011] Preferably, in step 1, the diameter of the acrylonitrile-butadiene-styrene terpolymer tube is 2-4 mm, and the diameter of the heat-set filament is 0.1-0.3 mm. The weaving parameters are 8-20 spindles, a weaving angle of 30°-60°, a pitch of 16-20 mm, a heat-setting temperature of 160-200°C, and a time of 1-2 hours. During operation, the heat-setting process temperature of polyester cannot be too high or too low. If the heat-setting effect is lower than 180°, it is necessary to extend the heating time to eliminate the internal stress of polyester. If the temperature is higher than 220°, the polyester is converted from a glassy state to a molten state, the polymer structure changes, the polyester tube softens, and the setting fails.

[0012] Preferably, the thermal curing temperature in step 2 is 60-80°C and the time is 15-30 minutes; during operation, the conductive ink coating process needs to cover the entire surface of the polyester tube to form a complete conductive path to lead out the induced charge; the conductive ink uses silver paste for stronger adhesion and better charge conduction performance.

[0013] Preferably, the PDMS in step three is prepared by weight: 10 parts A and 90 parts B, and the drying temperature is 60 to 80° C. for 1 to 2 hours. During operation, the best drying temperature is 80° C. for 2 hours.

[0014] Preferably, in step 4, the nylon filament has a parameter of 70D / 24F; the weaving parameters are 8 to 12 spindles, a weaving angle of 30° to 60°, a pitch of 16 to 20 mm, and a metal yarn diameter of 0.2 to 0.3 mm.

[0015] Preferably, the diameter of the nylon yarn in step four is much smaller than the diameter of the polyester tube in step two, and after forming a coaxial structure, the polyester tube can achieve contact and separation with the nylon yarn within a larger scale range.

[0016] Preferably, the manufactured coaxial tubular friction nanogenerator can be integrated with textiles as yarn and used to power microelectronic devices; when working, the manufactured multi-mode coexistence coaxial tubular friction nanogenerator itself can be used as a self-powered sensor and mechanical energy conversion electrical energy device, and woven into products such as clothing, home textiles, and soles.

[0017] Preferably, in the manufactured coaxial tubular friction generator, the output of the electrode signal can be used for sensing.

[0018] The present invention is beneficial in that:

[0019] 1. The present invention discloses a method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator and sensor. The heat-set filament is prepared into a tubular structure with excellent elastic recovery ability, which provides a good separation effect for the contact-separation working mode of the friction nanogenerator and produces a higher electrical output. The coaxial structure formed by using woven nylon as the core layer and PDMS-coated tubular outer layer can realize the coexistence of single-electrode and contact-separation modes of the friction nanogenerator, and realize the superposition of single-electrode output power to the contact-separation mode, and then output together through an external circuit, which effectively improves the output efficiency of the one-dimensional linear friction nanogenerator. Further, the output electrical signal can be used as a sensing signal to achieve self-powered energy storage and sensing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 An exploded view of a friction nanogenerator provided by an example of the present invention;

[0022] Figure 2 for Figure 1 The working principle diagram of the friction nanogenerator shown;

[0023] Figure 3 The present invention is a flow chart of the method.

[0024] In the figure: 1. External electrode dielectric layer; 2. Skeleton induction layer; 3. Internal electrode electrification layer; 4. Internal electrode induction layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0026] A method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator and sensor, comprising a tubular PET outer layer coated with PDMS and a core layer composed of woven nylon yarn, specifically comprising the following steps:

[0027] Step 1: Prepare a compression rebound skeleton, wind the heat-set filaments with a fineness of 0.2 mm on 12 spindles of a braiding machine respectively, take an acrylonitrile (A)-butadiene (B)-styrene (S) terpolymer tube with a diameter of 2-4 mm, use it as an axis to weave the heat-set filaments on the surface of the tube to form a hollow cylindrical tube, and then use a heat-setting process to set the polyester tube, the setting temperature is 200°C, the time is 2h, and a compression rebound heat-set filament skeleton is obtained;

[0028] Step 2: Prepare an electrostatic induction electrode, select a conductive silver paste with a P / O of 300H as a conductive coating material, apply a conductive ink on the surface of the polyester tube described in step 1 by a coating process, heat to 80° C. and cure for 15-20 minutes, so that the polyester tube is conductive;

[0029] Step 3: Prepare a dielectric electrode, prepare PDMS components A and B by weight, mix the two components in a ratio of 90:10, inject the resulting mixed solution into the conductive coated polyester tube described in step 2 and let it stand, then transfer it to an oven at 80° for drying for 2 hours to set the shape, and demold and take it out after setting the shape to obtain a tubular electrode;

[0030] Step 4: Prepare a coaxial electrification electrode, wind nylon filaments with a fineness of 70D / 24F on the spindle of a braiding machine, take a metal copper wire with a fineness of 0.2mm, and use it as the axis to weave the nylon filaments on the metal yarn, the metal yarn is the electrostatic induction yarn, and the braided nylon yarn is the electrification yarn;

[0031] Step 5: Assemble the electrodes obtained in step 4 and step 3 to obtain a coaxial tubular friction nanogenerator, such as Figure 1 shown.

[0032] The coaxial tubular friction nanogenerator can realize the coexistence of two working modes of TENG: single electrode and contact separation. Figure 2 As shown, when TENG is pressed by hand or clothing, the electrons in the external circuit move in two consistent directions within one movement cycle, improving the output performance of the generator.

[0033] In this scheme, the present invention provides a method for preparing a multi-mode coaxial tubular friction nanogenerator and a sensor. This structure provides a new design method for a friction nanogenerator. The heat-set filaments used have a skeleton effect, which improves the problems of the one-dimensional linear friction nanogenerator, such as small output electrical signal, short service life, and low degree of integration with textiles.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator, characterized in that: The preparation method comprises the following steps: Step 1: Prepare a compression-rebound skeleton, wind heat-set filaments of a certain fineness on the spindle of a braiding machine, take an acrylonitrile-butadiene-styrene terpolymer tube of a certain diameter, use it as an axis to weave the heat-set filaments on the surface of the tube to form a hollow cylindrical tube, and then use a heat-setting process to shape the polyester tube to obtain a compression-rebound heat-set filament skeleton; Step 2: Prepare an electrostatic induction electrode, select conductive ink as a conductive coating material, use a coating process to coat the conductive ink on the surface of the polyester tube described in step 1, and heat-dry it to make it adhere to the surface of the tube body, so that the polyester tube is conductive; Step 3: Prepare a dielectric electrode, prepare PDMS components A and B by weight, mix the two components in proportion, inject the obtained mixed solution into the conductive coated polyester tube described in step 2 and let it stand, then transfer it to an oven for drying and shaping, and demold and take it out after shaping to obtain a tubular electrode; Step 4: prepare a coaxial electrification electrode, wind nylon filaments of a certain fineness on the spindle of a braiding machine, take a conductive metal yarn of a certain fineness, and use it as an axis to weave the nylon filaments on the metal yarn, the metal yarn is the electrostatic induction yarn, and the braided nylon yarn is the electrification yarn; Step 5: Assemble the electrodes obtained in the above step 4 and step 3 so that they are coaxial and fixed at both ends to obtain a coaxial tubular friction nanogenerator.

2. The method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator according to claim 1, characterized in that: In step 1, the diameter of the acrylonitrile-butadiene-styrene terpolymer tube is 2-4 mm, and the diameter of the heat-set filament is 0.1-0.3 mm; the braiding parameters are 8-20 spindles, the braiding angle is 30°-60°, the pitch is 16-20 mm, the heat-setting temperature is 160-200°C, and the time is 1-2 hours.

3. The method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator according to claim 1, characterized in that: In step 2, the curing temperature is 60 to 80° C. and the curing time is 15 to 30 minutes.

4. The method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator according to claim 1, characterized in that: The PDMS in step 3 is prepared by weight: 10 parts of component A and 90 parts of component B, and the heat-drying temperature is 60-80° C. and the time is 1-2 hours.

5. The method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator according to claim 1, characterized in that: In step 4, the nylon filament has a parameter of 70D / 24F; the weaving parameters are 8 to 12 spindles, a weaving angle of 30° to 60°, a pitch of 16 to 20 mm, and a metal yarn diameter of 0.2 to 0.3 mm.

6. The method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator according to claim 1, characterized in that: The diameter of the nylon yarn in step 4 is much smaller than the diameter of the polyester tube in step 2. After forming a coaxial structure, the polyester tube can achieve contact and separation with the nylon yarn within a larger scale range.

7. The method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator according to claim 1, characterized in that: The coaxial tubular friction nanogenerator can be integrated with yarn and textiles and used to power microelectronic devices.

8. The method for preparing a multi-mode coexisting coaxial tubular friction nanogenerator according to claim 1, characterized in that: In the manufactured coaxial tubular friction generator, the output of the electrode signal can be used for sensing.

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