WO2014059807A1

WO2014059807A1 - Triboelectricity-based pressure-sensitive cable

Info

Publication number: WO2014059807A1
Application number: PCT/CN2013/079461
Authority: WO
Inventors: 范凤茹; 刘军锋; 邓杨
Original assignee: 纳米新能源（唐山）有限责任公司
Priority date: 2012-10-19
Filing date: 2013-07-16
Publication date: 2014-04-24
Also published as: CN103776567A; CN103776567B

Abstract

A triboelectricity-based pressure-sensitive cable, comprising a first electrode core (11), a hollow (12), a first polymer insulation layer (13), and a second electrode layer (14) coaxially disposed in sequence; the hollow is provided with a second polymer spacer therein; the first electrode core (11) and the second electrode layer (14) are the voltage and current output electrodes of the triboelectricity-based pressure-sensitive cable. The present invention utilizes the friction between two polymers or the friction between a polymer and a metal to generate a voltage signal in direct proportion to the pressure applied on the pressure-sensitive cable.

Description

Friction-based pressure sensing cable

Technical field

The present invention relates to a pressure sensing cable, and more particularly to a friction sensing based pressure sensing cable. Background technique

With the continuous improvement of the modern living standards and the accelerating pace of life, there have been self-generating devices that are easy to apply and have low dependence on the environment. Existing self-generating devices typically utilize the piezoelectric properties of the material. For example, in 2006, Professor Wang Zhonglin of the Georgia Institute of Technology in the United States successfully converted mechanical energy into electrical energy in the nanometer scale, and developed the world's smallest generator-nano generator. The basic principle of nanogenerators is: When nanowires (NWs) are dynamically stretched under external forces, a piezoelectric potential is generated in the nanowires, and the corresponding transient current flows at both ends to balance the Fermi level.

The conventional piezoelectric sensor is a flat film type, and in recent years, a piezoelectric cable has appeared in accordance with application requirements. Piezoelectric cables are designed coaxially. When the piezoelectric cable is compressed or stretched, a piezoelectric effect occurs, producing a charge or voltage signal proportional to the pressure to provide the operating voltage. Piezoelectric sensors are sensors made by utilizing the piezoelectric effect generated by the piezoelectric material. They have been widely used in many fields such as acoustics, medical, industrial, transportation, security, etc., and are gradually changing the way people live and work, becoming a society. The trend of development.

Rubbing between objects and objects causes one to be negatively charged and the other to be positively charged. The electricity generated by the friction between the objects is called triboelectric. Friction is one of the most common phenomena in nature, but it is difficult to collect and ignore. If the triboelectric power can be applied to the pressure sensing cable, it will definitely bring more convenience to people's lives. Summary of the invention

The technical problem to be solved by the present invention is to provide a friction-inducing pressure-sensing cable, which is generated under frictional conditions by friction between a polymer and a polymer or between a polymer and a metal. The voltage signal applied to the pressure sensing cable is proportional to the pressure, which has the characteristics of high production process, high sensitivity, fast response and long service life.

In order to solve the above technical problem, the first technical solution adopted by the present invention is: a triboelectric-based pressure sensing cable comprising a first electrode core, a cavity, and a first polymer insulating layer disposed in parallel coaxially And a second electrode layer; wherein a second polymer spacer is disposed in the cavity; the first electrode core and the second electrode layer are voltage and current output electrodes of the triboelectric based pressure sensing cable.

In the aforementioned triboelectric-based pressure sensing cable, the second polymer spacer is a second polymer insulating layer disposed on the surface of the first electrode core.

In the aforementioned triboelectric-based pressure sensing cable, the thickness of the second polymer insulating layer is 300 nm to 1 μm.

In the foregoing triboelectric-based pressure sensing cable, the material of the first polymer insulating layer is selected from the group consisting of a polyimide film, an aniline resin film, a polyacetal film, an ethyl cellulose film, a polyamide film, and a melamine ruthenium. Aldehyde film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, poly(phenylene terephthalate film), fiber (regeneration) Sponge film, polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl methacrylate film, polyvinyl alcohol film, polyisobutylene film, polyparaphenylene Acid glycol film, polyvinyl butyral film, furfural phenol condensation film, neoprene film, butadiene propylene copolymer film, natural rubber film, polyacrylonitrile film, acrylonitrile vinyl chloride copolymer Any of the films.

In the foregoing triboelectric-based pressure sensing cable, the second polymer insulating layer is made of a material different from the first polymer insulating layer, and is selected from the group consisting of a polyimide film, an aniline furfural resin film, a polyacetal film, and an ethyl group. Cellulose film, polyamide film, melamine furfural film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, polyphthalic acid Diallyl ester film, fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl acrylate film, polyvinyl alcohol film , polyisobutylene film, polyethylene terephthalate film, polyvinyl butyral film, furfural phenol condensation film, neoprene film, butadiene propylene copolymer Any one of a film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film.

In the foregoing triboelectric-based pressure sensing cable, at least one of the opposite surfaces of the first polymer insulating layer and the second polymer insulating layer is provided with a micro-nano-convex structure of nanometer to micrometer order, preferably a bump height Nano-concave structure of 50nm-300nm.

In the foregoing triboelectric-based pressure sensing cable, the second polymer spacer is a polymer spacer disposed in the cavity, and the height of the spacer is 100 ηηι -1 μ ηι.

In the foregoing triboelectric-based pressure sensing cable, the height of the spacer protrusion is 200 ηηι -1μηι. In the foregoing friction-electric-based pressure sensing cable, the number of upper partitions per unit area is 2 10 ⁴ / m ² to 2 X 10 ⁷ / m ² .

The unit area refers to the number of partitions per square meter of area. The spacer of the present invention is disposed in the cavity, so that the surface formed by the spacer is preferably a circumference concentric with the first electrode core, the radius of the circumference being greater than or equal to the radius of the first electrode core, less than or equal to the first polymer insulation The radius of the layer. When the radius of the circumference is equal to the radius of the first electrode core, the spacer is disposed on the surface of the first electrode core, and when the radius of the circumference is equal to the radius of the first polymer insulating layer, the spacer is disposed on the surface of the first polymer insulating layer.

In the aforementioned triboelectric-based pressure sensing cable, the material used for the spacer is a polymer and is different from the material used for the first polymer insulating layer.

In the foregoing triboelectric-based pressure sensing cable, the material used for the spacer is selected from the group consisting of a polyimide film, an aniline furfural resin film, a polyacetal film, an ethyl cellulose film, a polyamide film, a melamine furfural film, Polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, poly(phenylene terephthalate film), fiber (recycled) sponge film, Polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl methacrylate film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate Alcohol ester film, polyvinyl butyral film, furfural phenol polycondensate film, neoprene film, butadiene propylene copolymer film, natural rubber film, polyacrylonitrile film, acrylonitrile vinyl chloride copolymer film Any one.

In the aforementioned triboelectric-based pressure sensing cable, the spacer is disposed on the surface of the first electrode core. In the foregoing triboelectric-based pressure sensing cable, the second polymer spacer is wrapped around A polymer wire on the surface of an electrode core, preferably having a diameter of 500 nm to 2 μm. In the aforementioned triboelectric-based pressure sensing cable, the winding of the polymer wire on the surface of the first electrode core is greatly 0.1 μm to 5 μm.

In the foregoing triboelectric-based pressure sensing cable, the winding pitch of the polymer wire on the surface of the first electrode core is Ιμηι to 5μηι.

In the aforementioned triboelectric-based pressure sensing cable, the material of the polymer wire is different from the first polymer insulating layer.

In the foregoing triboelectric-based pressure sensing cable, the material for the polymer wire is selected from the group consisting of polyimide film, aniline acetal resin film, polyacetal film, ethyl cellulose film, polyamide film, melamine furfural film. , polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, poly(phenylene terephthalate film), fiber (recycled) sponge film , polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl methacrylate film, polyvinyl alcohol film, polyisobutylene film, poly-terephthalic acid Glycol ester film, polyvinyl butyral film, furfural phenol condensation film, neoprene film, butadiene propylene copolymer film, natural rubber film, polyacrylonitrile film, acrylonitrile vinyl chloride copolymer film Any of them.

In the aforementioned triboelectric-based pressure sensing cable, the first electrode core is a single core structure.

In the aforementioned triboelectric-based pressure sensing cable, the first electrode core is a multi-core structure arranged in parallel.

In the aforementioned triboelectric-based pressure sensing cable, the first electrode core is a wound multi-core structure.

In the foregoing triboelectric-based pressure sensing cable, the material of the first electrode core is metal or alloy, wherein the metal is gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, Phase, tungsten or vanadium; alloys are aluminum alloys, titanium alloys, magnesium alloys, niobium alloys, copper alloys, alloys, manganese alloys, nickel alloys, lead alloys, tin alloys, cadmium alloys, niobium alloys, indium alloys, gallium alloys, Tungsten alloy, molybdenum alloy, niobium alloy or niobium alloy.

In the foregoing triboelectric-based pressure sensing cable, the material used for the first electrode core is a polymer, glass or fiber having a conductive layer on its surface. In the foregoing triboelectric-based pressure sensing cable, the conductive layer is an indium tin oxide film, a graphene film, a silver nanowire film or a metal film, wherein the metal material used for the metal film is gold, silver, platinum, palladium, Aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, phase, tungsten or vanadium.

In the foregoing triboelectric-based pressure sensing cable, the material of the second electrode layer is selected from the group consisting of indium tin oxide, graphene electrode, silver nanowire film, and metal or alloy, wherein the metal is gold, silver, platinum, palladium, Aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, phase, tungsten or vanadium; alloys are aluminum alloys, titanium alloys, magnesium alloys, niobium alloys, copper alloys, alloys, manganese alloys, nickel alloys, lead alloys , tin alloy, cadmium alloy, niobium alloy, indium alloy, gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy or niobium alloy.

When the triboelectric based pressure sensing cable of the present invention is subjected to pressure, a charge or voltage signal proportional to the pressure is generated. The pressure-sensing cable based on triboelectric has the characteristics of single production process, high sensitivity, fast response speed and long service life. DRAWINGS

1 is a cross-sectional view of a triboelectric-based pressure sensing cable according to an embodiment of the present invention;

2 is a schematic structural view of the pressure sensing cable of FIG. 1;

3 is a schematic cross-sectional view of a triboelectric-based pressure sensing cable according to another embodiment of the present invention;

Figure 4 is a schematic structural view of the pressure sensing cable of Figure 3;

Figure 5 is a cross-sectional view showing a triboelectric-based pressure sensing cable according to still another embodiment of the present invention;

Figure 6 is a schematic structural view of the pressure sensing cable of Figure 5;

Figure 7 is a cross-sectional view showing a triboelectric-based pressure sensing cable according to still another embodiment of the present invention;

FIG. 8 is a schematic structural view of the pressure sensing cable of FIG. 7. FIG. detailed description The present invention will be described in detail by the following detailed description of the invention.

The invention is based on a triboelectric pressure sensing cable. When the cable is subjected to pressure and generates a charge or voltage signal proportional to the pressure, it can be used as a traffic shaft pressure sensor to measure the vehicle speed and the vehicle weight, and is used as a cable switch detection presence/occupancy rate. Used as a contact microphone to monitor vital signs and perimeter safety.

A triboelectric-based pressure sensing cable according to a specific embodiment, the pressure sensing cable includes a first electrode core, a cavity, a first polymer insulating layer and a second electrode layer disposed coaxially in sequence; wherein the pressure sensing When the cable is naturally stretched, the first polymer insulating layer is separated from the first electrode core by a cavity; when the pressure sensing cable is bent by force, the first polymer insulating layer is in frictional contact with the first electrode core; The electrode core and the second electrode layer are voltage and current output electrodes of a triboelectric based pressure sensing cable. In the present application, a triboelectric-based pressure sensing cable refers to a pressure sensing cable based on a friction generator principle, and the first electrode core and the second electrode layer are voltage and current output electrodes of a friction generator (ie, a pressure sensing cable). .

When the triboelectric-based pressure sensing cable is bent by force, the first polymer insulating layer is in frictional contact with the first electrode core to generate an electrostatic charge, and the generation of the electrostatic charge causes a capacitance between the first electrode core and the second electrode layer to occur. The change causes a potential difference to occur between the first electrode core and the second electrode layer. Due to the existence of a potential difference between the first electrode core and the second electrode layer, free electrons will flow from the lower potential side to the higher potential side through the external circuit, thereby forming a current in the external circuit. When the triboelectric-based pressure sensing cable returns to the natural state, the internal potential formed between the first electrode core and the second electrode layer disappears, and between the balanced first electrode core and the second electrode layer The reverse potential difference will again be generated, and the free electrons will form a reverse current through the external circuit. By repeated friction and recovery, periodic alternating current signals can be formed in the external circuit.

As shown in FIGS. 1 and 2, a triboelectric-based pressure sensing cable 1 of a specific embodiment includes a first electrode core 11 disposed in series, a cavity 12, and a first polymer insulating layer 13. And a second electrode layer 14; wherein a second polymer spacer (not shown) is disposed in the cavity 12; the first electrode core 11 and the second electrode layer 14 are voltage and current outputs of the pressure sensing cable 1 electrode.

A triboelectric-based pressure sensing cable 1 as shown in FIGS. 1 and 2, a first polymer insulating layer 13 The material used may be selected from the group consisting of polyimide film, aniline furfural resin film, polyacetal film, ethyl cellulose film, polyamide film, melamine furfural film, polyethylene glycol succinate film, cellulose film. , cellulose acetate film, polyethylene adipate film, poly(phenylene terephthalate) film, fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film, benzene Ethylene butadiene copolymer film, rayon film, polydecyl acrylate film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate film, polyvinyl butyral film, ruthenium Any one of an aldehyde phenol polycondensate film, a neoprene film, a butadiene propylene copolymer film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film.

The material of the second electrode layer 14 is selected from the group consisting of indium tin oxide, graphene electrode, silver nanowire film, and metal or alloy, wherein the metal is gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin. , iron, manganese, phase, tungsten or vanadium; alloys are aluminum alloys, titanium alloys, magnesium alloys, niobium alloys, copper alloys, alloys, manganese alloys, nickel alloys, lead alloys, tin alloys, cadmium alloys, niobium alloys, indium Alloy, gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy or niobium alloy.

The first electrode core 11 in the pressure sensing cable 1 shown in Figs. 1 and 2 has a single core structure. The material of the first electrode core 11 may be a metal or an alloy, wherein the metal may be, but not limited to, gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, phase, tungsten or vanadium. The alloy may be, but not limited to, an aluminum alloy, a titanium alloy, a magnesium alloy, a bismuth alloy, a copper alloy, a rhodium alloy, a manganese alloy, a nickel alloy, a lead alloy, a tin alloy, a cadmium alloy, a bismuth alloy, an indium alloy, a gallium alloy, Tungsten alloy, molybdenum alloy, niobium alloy or niobium alloy.

In a preferred embodiment, the material used for the first electrode core 11 may also be a polymer, glass or fiber having a conductive layer on its surface. The polymer described herein may be selected from the same range as the material used for the first polymer insulating layer, namely, a polyimide film, an aniline furfural resin film, a polyacetal film, an ethyl cellulose film, a polyamide. Film, melamine furfural film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, poly(phenylene terephthalate) film, Fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl methacrylate film, polyvinyl alcohol film, polyisobutylene film, poly Ethylene terephthalate film, polyvinyl butyral film, furfural phenol condensation film, neoprene film, butadiene propylene Any one of a polymer film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film. The glass refers to various silica-based glass materials, including glass having different uses and functions. The fibers include various plant fibers, animal fibers, rayon fibers, fabric fibers, and cellulosic fibers such as cotton, kapok, linen, ramie, jute, bamboo fiber, sisal, abaca, sheep wool, cashmere, camel. Hair, rabbit hair, mohair, silk, viscose fiber, acetate fiber, copper ammonia fiber, polyester fiber (polyester), polyamide fiber (nylon or nylon), polyvinyl alcohol fiber (Vinyl), polyacrylonitrile fiber (acrylic fiber) ), polypropylene fiber (polypropylene), polyvinyl chloride fiber (chlorinated fiber), and the like.

The conductive layer may be an indium tin oxide film, a graphene film, a silver nanowire film or a metal film provided on a surface of a polymer, glass or fiber by a conventional magnetron sputtering or evaporation method, wherein the metal film is used for The metal material may be, but not limited to, gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, phase, tungsten or vanadium.

As shown in FIGS. 3 and 4, in a preferred embodiment, the pressure sensing cable 2 includes a first electrode core 21, a cavity 22, a first polymer insulating layer 23, and a second electrode layer 24, which are disposed coaxially in series, wherein The first electrode core 21 is a multi-core structure arranged in parallel. The materials used for the first electrode core 21, the first polymer insulating layer 23 and the second electrode layer 24 are the same as those used for the pressure sensing cable 1 shown in Fig. 1, and will not be described again. In another preferred embodiment, the first electrode core 21 may also be a multi-core structure that is wound.

Each of the electrode cores of the first electrode core 21 can be selected from different materials so that different signals can be output or different functions can be added. For example, if a metal is plated on a glass fiber, the fiber can transmit both an optical signal and an electrical signal.

As shown in FIGS. 5 and 6, in a preferred embodiment, the pressure sensing cable 3 includes a first electrode core 31, a cavity 32, a first polymer insulating layer 33, and a second electrode layer 34, which are disposed coaxially in series, wherein A compartment 35 is provided in the cavity 32. Preferably, the height of the spacer protrusion is from 100 nm to 1 μm, and is disposed on the surface of the first electrode core 31, and the number of the spacers per unit area is from 2 10 ⁴ /m ² to 2 10 ⁷ /m ² . The spacer 35 is adhered to the surface of the first electrode core 31, for example, using a conventional commercially available conductive paste. The materials used for the first electrode core 31, the first polymer insulating layer 33 and the second electrode layer 34 are the same as those used for the pressure sensing cable 1 shown in Fig. 1, and will not be described again. The material used for the spacer 35 is preferably a polymer and is different from the material used for the first polymer insulating layer 33. The material used for the spacer may be selected from, but not limited to, polyimide film, aniline resin film, polyacetal film, ethyl cellulose film, polyamide film, melamine furfural film, polyethylene glycol butyl Acid ester film, cellulose film, cellulose acetate film, polyethylene adipate film, diallyl phthalate film, fiber (recycled) sponge film, polyurethane elastomer film, benzene Ethylene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl acrylate film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate film, polyethylene Any one of a butyral film, a furfural phenol polycondensate film, a neoprene film, a butadiene propylene copolymer film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film.

In another preferred embodiment, the pressure sensing cable includes a first electrode core, a cavity, a first polymer insulating layer and a second electrode layer disposed coaxially in sequence, wherein the cavity is provided with a first pitch wound at a first interval The polymer wires on the surface of the electrode core, for example, the pitch of the polymer wires on the surface of the first electrode core are 0.1 μm to 5 μm. Typically the polymer strands have a diameter of from 500 nm to 2 μm.

The material used for the polymer strand is different from the first polymer insulating layer. The material used for the polymer wire is selected from the group consisting of polyimide film, aniline furfural resin film, polyacetal film, ethyl cellulose film, polyamide film, melamine furfural film, polyethylene glycol succinate film, fiber Film, cellulose acetate film, polyethylene adipate film, diallyl phthalate film, fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film , styrene butadiene copolymer film, rayon film, polydecyl methacrylate film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate film, polyvinyl butyral film Any one of a furfural phenol condensation polymer film, a neoprene film, a butadiene propylene copolymer film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film.

The arrangement of the spacers 35 and the polymer wires enables the pressure sensing cable to effectively isolate the first polymeric insulating layer from the first electrode core when in a naturally extended state. In addition, a polymer having a good triboelectric effect with the first polymer insulating layer is selected to contribute to the triboelectric charging of the pressure sensing cable. In another preferred embodiment, the pressure sensing cable includes a first electrode core, a cavity, a first polymer insulating layer, and a second electrode layer, which are disposed coaxially in parallel, and a surface of the first polymer insulating layer opposite to the first electrode core A nano-to-micron micro-nano-convex structure is provided thereon, preferably a protrusion height

Nano-concave structure of 50nm-3 OOnm (not shown).

When the triboelectric-based pressure sensing cable is bent by force, the first polymer insulating layer is in frictional contact with the first electrode core to form a friction surface. The roughness of the friction surface affects the output of the voltage and current, that is, the size and number of the septum per unit area, as well as the thickness of the polymer and the spacing of the winding, all have an effect on the output properties of the electrical energy. In the present invention, when the spacer is used as the second polymer spacer, the preferred height of the spacer is 100 nm to 1 μm, and the number of spacers per unit area is 2 10 ⁴ / m ² to 2 x 10 ⁷ /m ² . When the height (particle size) of the spacer is less than 100 nm, the cost is too high; when the height (particle size) of the spacer is greater than 1 μm, the voltage and current signals are rapidly lowered. When a polymer wire is used as the second polymer spacer in the present invention, the preferred polymer wire diameter is 500 nm to 2 μm, and the winding of the polymer wire is greatly 0.1 μm to 5 μm, more preferably 1 μ m to 5 μ m. When the polymer wire diameter is larger than 2 μ ηι and the winding pitch exceeds 5 μ η, the voltage and current signals are rapidly reduced.

As shown in FIGS. 7 and 8, a triboelectric-based pressure sensing cable 4 of the specific embodiment includes a first electrode core 41, a cavity 42 and a first polymer insulating layer 43 which are disposed coaxially in sequence. And a second electrode layer 44. The piezoelectric cable 4 further includes a second polymer insulating layer 45 disposed between the first electrode core 41 and the cavity 42; wherein, when the pressure sensing cable 4 is naturally extended, the first polymer insulating layer 43 and the first The two polymer insulating layers 45 are separated by a cavity 42. When the pressure sensing cable 4 is bent by force, the first polymer insulating layer 43 is in contact with the second polymer insulating layer 45. The first electrode core 41 and the second electrode layer 44 are voltage and current output electrodes of the pressure sensing cable 4.

The materials used for the first electrode core 41, the first polymer insulating layer 43, and the second electrode layer 44 are the same as those used for the pressure sensing cable 1 shown in Fig. 1, and will not be described again.

The thickness of the second polymer insulating layer is 300 nm to 1 μm. The second polymer insulating layer is different from the first polymer insulating layer and may be selected from the group consisting of a polyimide film, an aniline resin film, a polyacetal film, an ethyl cellulose film, a polyamide film, and a melamine lanthanum. Aldehyde film, Polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, poly(phenylene terephthalate film), fiber (recycled) sponge film, Polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl methacrylate film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate Alcohol ester film, polyvinyl butyral film, furfural phenol polycondensate film, neoprene film, butadiene propylene copolymer film, natural rubber film, polyacrylonitrile film, acrylonitrile vinyl chloride copolymer film Any one.

In a preferred embodiment, at least one of the opposite surfaces of the first polymer insulating layer 43 and the second polymer insulating layer 45 is provided with a micro-nano-convex structure of nanometer to micrometer order, preferably a bump height of 50 nm- 300 nm nano concave and convex structure (not shown).

The micro/nano-convex structure can be prepared by a variety of methods, such as pressing with a silicon template having a specific regular raised structure, sanding a roughened metal as a template, and other methods. A preparation method of the nano concave-convex structure will be described in detail below.

S1 creates a silicon template. A regular pattern is formed on the surface by photolithography of the silicon wafer. The patterned silicon wafer is anisotropically etched by wet etching, and a concave quadrangular pyramid array structure can be engraved, or a concave cube array structure can be engraved by dry etching process isotropic etching. . After the engraving, the template was cleaned with acetone and isopropyl alcohol, and then all the templates were subjected to surface silanization in a trimethyl chlorosilane atmosphere, and the treated silicon template was used.

S2 produces a polymer film having a micro-nano convex surface. The polymer slurry is first applied to the surface of the silicon template, vacuum degassed, and the excess mixture on the surface of the wafer is removed by spin coating to form a thin polymer liquid film. The entire template was cured and then peeled off to obtain a uniform polymer film having a specific microstructure array.

In practical applications, the first electrode core and the second electrode layer of the triboelectric-based pressure sensing cable are respectively connected to the detector, and when the cable is under pressure, the first electrode core and the second electrode layer generate a positively applicable probe. The device is a conventional commercially available detector.

According to the above principle, the friction-electric pressure sensing cable of the present invention can be used as a traffic axis sensor for detecting the presence/occupancy rate of a piezoelectric cable switch, and is used as a contact microphone to monitor vital signs and Perimeter security. For example, as a traffic axis sensor, when the tire passes through the cable, it produces a voltage signal proportional to the pressure applied to the sensor, and the output period is the same as the time the tire stays on the sensor. Whenever a tire passes the sensor, the sensor will Generate a new electronic pulse. Two sensors are installed in the lane. When the tire passes the first sensor, the electronic clock is started. When the tire passes the second sensor, the electronic clock is started to stop the clock, and the time period is obtained. The distance between the sensors is known, and the speed is obtained. .

It is understood that this should not be construed as limiting the scope of the claims. Example 1

The pressure sensing cable 3 shown in Figure 5 has a diameter of 1.6 mm. Industrial aluminum having a purity of 99.5% and a diameter of 1.5 mm was used as the first electrode core 31.

A commercially available polyacrylonitrile acrylate tube having a diameter of 1.6 mm was used as the first polymer insulating layer 33. Commercially available polyethylene terephthalate particles having a diameter of 200 nm were used as the separator 35, and the polyethylene terephthalate particles were adhered to the first according to 2 10 ⁷ /m ² using a conductive adhesive. On the surface of the electrode core 31, the first electrode core 31 is then coaxially placed in a polymethyl methacrylate tube to form a cavity 32, and then the edges are sealed with a common tape.

Magnetron sputtering of indium tin oxide (ITO) onto the outer surface of the polyfluorenyl acrylate tube to form a second electrode layer 34, resulting in a pressure sensing cable 1#.

The voltage and current tests were performed using the Stanford SR560 voltage preamplifier and the SR 570 current preamplifier, respectively. When testing the voltage, due to the output limitation of the generator, the voltage of one of the resistors is measured by using multiple voltage dividers of the same resistor, and finally the number of resistors is multiplied to obtain the total output voltage of the generator.

The stepping motor with periodic oscillation (0.33 Hz and 0.13% deformation) causes the pressure sensing cable 1# to be bent and released periodically, and the maximum output voltage and current signal of the pressure sensing cable 1# reached 30 V and 10 μΑ, respectively. Example 2

A commercially available polyacrylonitrile acrylate tube having a diameter of 1.6 mm was used as the first polymer insulating layer 33. Commercially available polyethylene terephthalate particles having a diameter of 1 μηη are used as the separator 35, and the polyethylene terephthalate particles are adhered at 1 X 10 ⁵ /m ² using a conductive adhesive. On the surface of the first electrode core 31, the first electrode core 31 is then coaxially placed in a polymethyl methacrylate tube to form a cavity 32, and then the edges are sealed with a common tape.

Magnetron sputtering of indium tin oxide (ITO) onto the outer surface of the polyfluorenyl acrylate tube to form a second electrode layer 34, resulting in a pressure sensing cable 2#.

In the same manner as in Example 1, the maximum output voltage and current signals of the sample 2# were measured to reach 12 V and 3 μΑ, respectively. Example 3

The structure of this embodiment is basically the same as that of the embodiment 1, except that three optical fibers coated with metal gold having a diameter of 1 mm are arranged in parallel as the first electrode core. The polyethylene terephthalate particles were adhered to the surface of the first electrode core 31 at a rate of 1×10 ⁴ /m ² using a conductive paste, and then pressure-sensing was obtained by the same preparation method as in Example 1 by other steps. Cable 3#.

In the same manner as in Example 1, the maximum output voltage and current signals of the sample 3# were measured to reach 18 V and 6 μΑ, respectively.

The sensing cable 3# is capable of transmitting optical signals. Example 4

The pressure sensing cable of this embodiment has a diameter of 1.6 mm. Industrial copper with a purity of 99.5% and a diameter of 1.5 mm was used as the first electrode core.

A polyimide tube having a diameter of 1.6 mm was commercially available as the first polymer insulating layer. Commercially available polyethylene terephthalate wire with a diameter of 500 nm, wrapped with polyethylene terephthalate at a pitch of Ι μ ηι Wrap around the surface of the first electrode core, and then place the first electrode core coaxially into the polyimide tube to form a cavity, and then the edge is sealed with a common tape.

Magnetron sputtering of indium tin oxide (ITO) was sputtered onto the outer surface of the polyimide tube to form a second electrode layer, and a pressure sensing cable 4# was obtained.

In the same way as in Embodiment 1, the maximum output voltage and current signals were measured respectively.

35 V and 12 μΑ. Example 5

A polyimide tube having a diameter of 1.6 mm was commercially available as the first polymer insulating layer. Commercially available polyethylene terephthalate wire of 2 μ ηι diameter, wrapped with polyethylene terephthalate at a pitch of 5 μηη on the surface of the first electrode core, and then first The electrode core is coaxially placed in the polyimide tube to form a cavity, and then the edge is sealed with a common tape.

Magnetic control of indium tin oxide ( ΙΤΟ ) was sputtered onto the outer surface of the polyimide tube to form a second electrode layer, and a pressure sensing cable 5# was obtained.

In the same manner as in the first embodiment, the maximum output voltage and current signals were measured to reach 18 V and 5 μ, respectively. Example 6

The pressure sensing cable 4 shown in Figure 7 has a diameter of 2.2 mm. Industrial aluminum having a purity of 99.5% and a diameter of 1.5 mm was used as the first electrode core 41. A micro-nano-convex structure having a convex height of 150 nm is disposed on one surface of a polyethylene terephthalate film having a thickness of 0.25 mm, and then a polyethylene terephthalate film is disposed on the first electrode core On the surface of 41, a second polymer layer 45 having a thickness of 500 nm was formed.

A commercially available polyfluorenyl acrylate tube having a diameter of 2.2 mm was used as the first polymer insulating layer 43. The first electrode core 41 is coaxially placed in a polyacrylonitrile acrylate tube to form a cavity 42, and then the edges are sealed with a common tape. Magnetron sputtering (ITO) was sputter-deposited onto the outer surface of the polyfluorenyl acrylate tube to form a second electrode layer 44, and a pressure sensing cable 6# was obtained.

In the same manner as in Embodiment 1, the maximum output voltage and current signals were measured to reach 3 V and 1 μΑ, respectively. Example 7

Industrial aluminum with a purity of 99.5% and a diameter of 1.5 mm was used as the first electrode core. A commercially available polyfluorenyl acrylate tube having a diameter of 1.6 mm was used as the first polymer insulating layer. The first electrode core was coaxially placed in a polyacrylic acid acrylate tube and formed into a cavity, and then the edges were sealed with a common tape.

Magnetron sputtering of indium tin oxide (ITO) was sputtered onto the outer surface of the polyfluorenyl acrylate tube to form a second electrode layer, and a pressure sensing cable 7# was obtained.

In the same manner as in Embodiment 1, the maximum output voltage and current signals were measured to reach 5 V and 2 μΑ, respectively.

The triboelectric-based pressure sensing cable of the present invention can generate a voltage signal proportional to the pressure applied to the pressure sensing cable under frictional conditions by friction between the polymer and the polymer or between the polymer and the metal. It has the characteristics of single production process, high sensitivity, fast response and long service life.

Claims

Claim

1. A triboelectric-based pressure sensing cable, characterized in that the pressure sensing cable comprises a first electrode core, a cavity, a first polymer insulating layer and a second electrode layer which are arranged coaxially in sequence; wherein in the cavity Providing a second polymer spacer therein;

The first electrode core and the second electrode layer are voltage and electricity of a triboelectric-based pressure sensing cable

3⁄4 output electrode.

2. The triboelectric-based pressure sensing cable according to claim 1, wherein the second polymer spacer is a second polymer insulating layer disposed on a surface of the first electrode core.

3. The triboelectric-based pressure sensing cable according to claim 2, wherein the second polymer insulating layer has a thickness of 300 nm to 1 μm.

The triboelectric-based pressure sensing cable according to any one of claims 1 to 3, wherein the material of the first polymer insulating layer is selected from the group consisting of a polyimide film, an aniline furfural resin film, Polyacetal film, ethyl cellulose film, polyamide film, melamine furfural film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film , polydiphenyl phthalate film, fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, bismuth acrylate Ester film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate film, polyvinyl butyral film, furfural phenol condensation film, neoprene film, butadiene propylene copolymer Any one of a film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film.

The triboelectric-based pressure sensing cable according to claim 4, wherein the second polymer insulating layer is made of a material different from the first polymer insulating layer, and is selected from the group consisting of a polyimide film and an anisidine. Aldehyde resin film, polyacetal film, ethyl cellulose film, polyamide film, melamine furfural film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyadipate B Glycol ester film, poly(phenylene terephthalate) film, fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, human Fibrous film, polydecyl acrylate film, polyvinyl alcohol film, polyisobutylene film, polyethylene terephthalate film, polyvinyl butyral film, furfural phenol condensation film, chloroprene Any one of a rubber film, a butadiene propylene copolymer film, a natural rubber film, a polyacrylonitrile film, and an acrylonitrile vinyl chloride copolymer film.

The friction-electric-based pressure sensing cable according to claim 5, wherein at least one of the opposite surfaces of the first polymer insulating layer and the second polymer insulating layer is provided with nanometer to meter The nano-convex structure of the order is preferably a nano-concave structure having a protrusion height of 50 nm to 300 nm.

7. The triboelectric-based pressure sensing cable according to claim 1, wherein the second polymer spacer is a polymer spacer disposed in the cavity, and the height of the spacer is 100.

8. The triboelectric-based pressure sensing cable according to claim 7, wherein the height of the spacer protrusion is 200 ηηι -1μηι.

The friction-electric-based pressure sensing cable according to claim 7 or 8, wherein the number of upper points per unit area is 2 χ 10 ⁴ / m ² to 2 χ 10 ⁷ / m ² .

10. A triboelectric-based pressure sensing cable according to any one of claims 7-9, wherein the material used for the spacer is a polymer and is different from the material used for the first polymer insulating layer.

1 1. The triboelectric-based pressure sensing cable according to claim 10, wherein the material used for the spacer is selected from the group consisting of a polyimide film, an aniline furfural resin film, a polyacetal film, and an ethyl fiber. Film, polyamide film, melamine furfural film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, polyphthalic acid Allyl ester film, fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl acrylate film, polyvinyl alcohol film, Polyisobutylene film, polyethylene terephthalate film, polyvinyl butyral film, furfural phenol condensation film, neoprene film, butadiene propylene copolymer film, natural rubber film, polypropylene Any one of a nitrile film and an acrylonitrile vinyl chloride copolymer film.

12. A triboelectric-based pressure sensing cable according to any of claims 6-1 1 The spacer is disposed on the surface of the first electrode core.

13. The triboelectric-based pressure sensing cable according to claim 1, wherein the second polymer spacer is a polymer wire wound on a surface of the first electrode core, the diameter of the polymer wire It is 500 nm to 2μηι.

The triboelectric-based pressure sensing cable according to claim 13, wherein the winding pitch of the polymer wires on the surface of the first electrode core is Ο. ημηι to 5μηι.

15. The triboelectric-based pressure sensing cable according to claim 14, wherein a winding pitch of the polymer wire on a surface of the first electrode core is Ιμηι to 5μηι.

16. A triboelectric-based pressure sensing cable according to any of claims 13-15, wherein the polymer wire is made of a different material than the first polymeric insulating layer.

The triboelectric-based pressure sensing cable according to claim 16, wherein the material of the polymer wire is selected from the group consisting of a polyimide film, an anisole resin film, a polyacetal film, and an ethyl cellulose. Film, polyamide film, melamine furfural film, polyethylene glycol succinate film, cellulose film, cellulose acetate film, polyethylene adipate film, polyphthalic acid diene Propyl ester film, fiber (recycled) sponge film, polyurethane elastomer film, styrene propylene copolymer film, styrene butadiene copolymer film, rayon film, polydecyl acrylate film, polyvinyl alcohol film, poly Isobutylene film, polyethylene terephthalate film, polyvinyl butyral film, furfural phenol condensation film, neoprene film, butadiene propylene copolymer film, natural rubber film, polyacrylonitrile Any one of a film or an acrylonitrile vinyl chloride copolymer film.

The triboelectric-based pressure sensing cable according to any one of claims 1 to 17, wherein the first electrode core is a single core structure.

The triboelectric-based pressure sensing cable according to any one of claims 1 to 17, wherein the first electrode core is a multi-core structure arranged in parallel.

The triboelectric-based pressure sensing cable according to any one of claims 1 to 17, wherein the first electrode core is a wound multi-core structure.

The triboelectric-based pressure sensing cable according to any one of claims 1 to 20, wherein the material of the first electrode core is a metal or an alloy, wherein the metal is gold, silver, platinum, Palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, phase, tungsten or vanadium; alloys are aluminum alloys, titanium alloys, magnesium alloys, niobium alloys, copper alloys, alloys, manganese alloys, nickel alloys, Lead alloy, tin alloy, cadmium alloy, niobium alloy, indium alloy, gallium alloy, tungsten alloy, molybdenum alloy, niobium alloy or niobium alloy.

The triboelectric-based pressure sensing cable according to any one of claims 1 to 20, wherein the material for the first electrode core is a polymer, glass or fiber having a conductive layer on its surface.

The triboelectric-based pressure sensing cable according to claim 22, wherein the conductive layer is an indium tin oxide film, a graphene film, a silver nanowire film or a metal film, wherein the metal film is used The metal material is gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, phase, tungsten or vanadium.

The triboelectric-based pressure sensing cable according to any one of claims 1 to 23, wherein the material of the second electrode layer is selected from the group consisting of indium tin oxide, graphene electrode, and silver nanowire film. And a metal or an alloy, wherein the metal is gold, silver, platinum, palladium, aluminum, nickel, copper, titanium, chromium, tin, iron, manganese, phase, tungsten or vanadium; the alloy is an aluminum alloy, a titanium alloy, a magnesium alloy, a tantalum Alloys, copper alloys, alloys, manganese alloys, nickel alloys, lead alloys, tin alloys, cadmium alloys, niobium alloys, indium alloys, gallium alloys, tungsten alloys, molybdenum alloys, niobium alloys or niobium alloys.