CN114518394B - Self-generating flexible nano generator and application thereof - Google Patents
Self-generating flexible nano generator and application thereof Download PDFInfo
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- CN114518394B CN114518394B CN202011315128.9A CN202011315128A CN114518394B CN 114518394 B CN114518394 B CN 114518394B CN 202011315128 A CN202011315128 A CN 202011315128A CN 114518394 B CN114518394 B CN 114518394B
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G01N27/3271—Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood
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Abstract
The application discloses a self-generating flexible nano generator. The self-generating flexible nano generator sequentially comprises the following components from top to bottom: a first electrode layer, an arch bridge type block, whatman filter paper, a conductive film and a second electrode layer; the arch bridge-shaped block comprises two supporting tables and a vibrating top surface, and two sides of the vibrating top surface are respectively fixed with the two supporting tables; the two supporting tables and the vibrating top surface are enclosed to form a hollow groove; the vibrating top surface rubs with the Whatman filter paper when vibrating in the groove; the surface of the arch bridge-shaped block is provided with an electron adsorption layer. The generator is friction power generation equipment for converting mechanical vibration in the environment into current, and can be used for detecting the concentration of glucose in urine; the device does not need external power supply and other energy sources, can absorb energy from human body movement or external vibration, and can realize the detection of glucose in urine.
Description
Technical Field
The application relates to a self-generating flexible nano generator and application thereof, and belongs to the technical field of self-powered energy conversion.
Background
In recent times, the productivity of human society is rapidly improved, and industrialization is continuously progressed. Meanwhile, environmental problems are also becoming more prominent, and waste gas is discharged and energy is consumed in the production, transportation and treatment processes of industrial products. As the population increases, the demand increases, and these problems become more pronounced. Tribo-nano generators (TENG) were first taught in 2012 by Wang Zhonglin and may be used to collect various forms of energy released in human social life, including human motion, environmental vibrations, mechanical motion, wind energy, water energy, and the like. The friction nano generator provides a brand-new idea for solving the energy and environmental problems, and also points out a new direction for the construction of the Internet of things which is rapidly developed nowadays.
The friction nano generator for detecting the glucose concentration in urine in the prior art comprises a nano generator for detecting the glucose concentration published by a Xue Xinyu subject group, wherein the nano generator adopts an array mode, and the assembling process comprises processes such as copper plate etching and the like, and the etching process is tedious and time-consuming; in addition, there are also reports of the work of detecting the concentration of glucose using the piezoelectric properties of zinc oxide nanoarrays, but the growth process of zinc oxide nanoarrays is time-consuming and not easily repeated. The nano generator is simple and convenient to assemble, simple in structure and short in time consumption, and the defects can be effectively overcome.
Disclosure of Invention
According to one aspect of the application, a self-generating flexible nano-generator is provided, and the self-generating flexible nano-generator is friction power generation equipment for converting mechanical vibration in the environment into current, and can be used for detecting the concentration of glucose in urine; the device does not need external power supply and other energy sources, can absorb energy from human body movement or external vibration, realizes the detection of glucose in urine, and has stronger signal response to the change of glucose concentration. Has important significance for saving energy and improving human life.
A self-generating flexible nano-generator, comprising, in order from top to bottom: a first electrode layer, an arch bridge type block, whatman filter paper, a conductive film and a second electrode layer;
the arch bridge-shaped block comprises two supporting tables and a vibrating top surface, and two sides of the vibrating top surface are respectively fixed with the two supporting tables; the two supporting tables and the vibrating top surface are enclosed to form a hollow groove; the vibrating top surface rubs with the Whatman filter paper when vibrating in the groove; the surface of the arch bridge-shaped block is provided with an electron adsorption layer.
Specifically, the application provides a friction power generation device capable of converting mechanical vibration in the environment into electric current, and the friction power generation device can be used for detecting the concentration of glucose in urine. The electrode comprises a first electrode layer, a block body with an adsorption electronic layer on the outer surface of the arch bridge, whatman filter paper, a PANI film and a second electrode layer from top to bottom. Wires connected to external electronic components are connected to the two electrode layers. When external vibration is sensed, the arch bridge-shaped block moves up and down and rubs against Whatman filter paper, and mechanical energy in the environment is converted into electric energy to generate current. When the glucose concentration measuring device is used, a certain amount of liquid to be measured is dripped into the liquid to be measured area, and after the liquid to be measured is diffused into the indication area under the capillary action, the glucose concentration can be judged through the change of the output current after waiting for a period of time.
The bottom surface of the arch-bridge block is concave inwards to form a cavity, so that when a part of the top surface of the arch-bridge block vibrates in the cavity, friction with the Whatman filter paper occurs.
Optionally, a liquid area to be measured, a channel and an indication area are arranged on the Whatman filter paper along the length direction; one end of the channel is connected with the liquid area to be measured; the other end of the channel is connected with the indication area; the liquid area to be measured, the channel and the indication area are opposite to the vibration top surface.
Specifically, an indication area, a channel and a liquid area to be measured are constructed on Whatman filter paper by using a paraffin ink-jet printing technology. The test liquid may flow from the test liquid zone to the channel and the indicator zone.
Optionally, the indication area and the liquid area to be measured are both round,
the diameter of the indication area is 0.1-3 cm;
the width of the channel is 0.1-2 cm, and the length of the channel is 0.1-1.5 cm;
the diameter of the liquid area to be measured is 0.1-3 cm.
Optionally, the indication area is rectangular, the liquid area to be measured is circular,
the width of the indication area is 0.1-5 cm, and the length of the indication area is 0.1-5 cm;
the width of the channel is 0.1-2 cm, and the length of the channel is 0.1-1.5 cm;
the diameter of the liquid area to be measured is 0.1-3 cm.
Optionally, the conductive film is a polymer conductive film;
the polymer conductive film comprises any one of polyaniline film, polypyrrole film and polythiophene film.
Optionally, the conductive film covers the indication area.
Optionally, the material of the arch bridge block is a polymer with electronegativity larger than 8.
Optionally, the material of the arch bridge-shaped block is at least one selected from PDMS, PTFE, PVDF and silicone rubber.
Optionally, the dimensions of the arch bridge shaped block are: the length is 2-50 cm; the width is 2-50 cm; the thickness is 0.02-0.2cm.
Optionally, the groove is in a cube structure;
the size of the groove is as follows: the length is 0.1-10cm; the width is 0.1-10cm; the height is 0.02-0.2cm.
Alternatively, the first electrode and the second electrode are independently selected from any one of a copper electrode, a platinum electrode, and a platinum electrode.
Optionally, the preparation method of the polyaniline film comprises the following steps:
and immersing the PI film into an acidic reaction system containing aniline, p-toluenesulfonic acid, ammonium persulfate and a hydrophilic polymer for reaction to obtain the polyaniline film.
Specifically, the PI film is immersed into an acidic reaction system containing aniline, p-toluenesulfonic acid, ammonium persulfate and hydrophilic polymer, and is taken out after reaction for 1-10 hours, and is washed with deionized water for multiple times for standby.
Alternatively, aniline 1-10ml, p-toluenesulfonic acid 1-20g, ammonium persulfate 1-20g, acid concentration 0.1-5mol/L, and hydrophilic polymer 0.5-10g.
Alternatively, the acid used may be one or more of hydrochloric acid, phosphoric acid or sulfuric acid.
Alternatively, the hydrophilic polymer may be one or more of polyvinyl alcohol, polylactic acid, polyacrylamide, polymethyl methacrylate.
According to a second aspect of the present application, there is also provided a method of detecting glucose concentration in a solution, using any of the above-described self-generating flexible nano-generators to detect glucose concentration in a solution.
Optionally, the method comprises:
s100, dripping a liquid to be detected containing glucose into a liquid to be detected area of Whatman filter paper, wherein the liquid to be detected is diffused into an indication area;
s200, under external vibration, the vibration top surface of the arch bridge-shaped block vibrates in the groove and rubs with Whatman filter paper to convert mechanical vibration into an electric signal;
and S300, the conductive film receives and conducts the electric signals in the indication area to obtain the response relation between the glucose concentration and the current.
In the present application, "PANI" refers to the abbreviation of polyaniline;
"PI" is an abbreviation for polyimide;
"PDMS" is an abbreviation for polydimethylsilane;
"PTFE" is a short term for polytetrafluoroethylene;
"PVDF" is an abbreviation for polyvinylidene fluoride.
The beneficial effects that this application can produce include:
1) The self-generating flexible nano generator does not need an external power supply, and can drive the sensor by collecting mechanical energy of human body or environmental vibration.
2) The self-generating flexible nano generator is simple and convenient to assemble, convenient to use, low in manufacturing cost and has wide popularization and use values
3) The self-generating flexible nano generator can be used for detecting glucose in urine, is an environment-friendly and convenient means, can be used for detecting at any time and any place, and is stronger in response, simple in structure and convenient to prepare.
Drawings
FIG. 1 is an exploded view of a self-generating flexible nano-generator in one embodiment of the present application;
FIG. 2 is a schematic diagram of an assembled self-generating flexible nano-generator in one embodiment of the present application;
FIG. 3 is a schematic diagram of Whatman filter paper in one embodiment of the present application;
FIG. 4 is a plot of current signal versus time for detecting glucose concentration in a solution in one embodiment of the present application;
fig. 5 is a schematic view of a glass mold in one embodiment of the present application.
List of parts and reference numerals:
whatman filter paper; an indication area 2; 3 channels; 4 the liquid area to be measured.
Detailed Description
The present application is described in detail below with reference to examples, but the present application is not limited to these examples.
Unless otherwise indicated, both the starting materials and the catalysts in the examples of the present application were purchased commercially.
The invention provides friction power generation equipment for converting mechanical vibration in the environment into current, which can be used for detecting the concentration of glucose in urine. The device does not need external power supply and other energy sources, can absorb energy from human body movement or external vibration, and can realize the detection of glucose in urine. Has important significance for saving energy and improving human life.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the friction power generation equipment for detecting glucose in solution is a friction nano power generation body with a multilayer structure, and comprises two electrode layers, a block body with an adsorption electronic layer on the outer surface of an arch bridge, whatman filter paper, a PANI film and a wire connected with external equipment.
The Whatman filter paper used in the invention is provided with an indication area, a channel and a liquid area to be detected by using the paraffin ink-jet printing technology, wherein the diameter of the indication area is 0.1-3 cm; the width of the channel is 0.1-2 cm, and the length is 0.1-1.5 cm; the diameter of the liquid area to be measured is 0.1-3 cm.
The block with the electronic adsorption layer on the outer surface of the arch bridge shape comprises the following materials: PDMS, PTFE, PVDF or silicone rubber, and the like, and has a length or width of 2-50cm and a thickness of 0.02-0.2cm.
In the invention, the PANI film preparation process is characterized in that: immersing the PI film into an acidic reaction system containing aniline, p-toluenesulfonic acid, ammonium persulfate and hydrophilic polymer, reacting for 1-10h, taking out, and cleaning with deionized water for multiple times for later use.
The preparation system is characterized in that: 1-10ml of aniline, 1-20g of p-toluenesulfonic acid, 1-20g of ammonium persulfate, 0.1-5mol/L of acid concentration and 0.5-10g of hydrophilic polymer.
The acid can be one or more of hydrochloric acid, phosphoric acid or sulfuric acid.
The hydrophilic polymer can be one or more of polyvinyl alcohol, polylactic acid, polyacrylamide and polymethyl methacrylate.
The PANI film was prepared in the following examples: immersing the PI film into an acidic reaction system containing aniline, p-toluenesulfonic acid, ammonium persulfate and hydrophilic polymer, reacting for 8 hours, taking out, and cleaning with deionized water for multiple times for later use.
Wherein, 2ml of aniline, 10g of p-toluenesulfonic acid, 10g of ammonium persulfate, 2.5mol/L of acid concentration and 5g of hydrophilic polymer; the acid used may be hydrochloric acid; the hydrophilic polymer used may be polyvinyl alcohol.
Example 1
The self-generating flexible nano generator comprises the following assembly steps:
the liquid PDMS with bubbles removed in advance is injected into a self-made glass mould (figure 5), in order to obtain an arch bridge-shaped block, polyimide adhesive tape with the thickness of 0.3cm is attached to the bottom of the mould, and the mould is heated for 15min at 120 ℃ to obtain the arch bridge-shaped block shown in figure 1. The cured PDMS (2X 2.5X0.3 cm) was peeled off for use, and the size of the inner groove was 1X 2.5X0.3 cm. A copper foil electrode is stuck on one side of the upper plane of the PDMS, and a cut Whatman filter paper (2X 2.5 cm) is stuck on one side of the arch shape. And a PANI film (1 multiplied by 2.5 cm) prepared in advance is stuck on the other side of the filter paper, and then a copper foil electrode (1 multiplied by 2.5 cm) is stuck on the other side of the filter paper, so that the self-generating flexible nano generator is prepared as shown in figures 1 and 2.
Wherein, the structure of Whatman filter paper 1 is shown in FIG. 3, and the size of the indication area 2 is 2X 0.5cm; the channel 3 has a size of 1.5X0.5 cm; the size diameter of the liquid area 4 to be measured is 0.3cm.
Example 2
The self-generating flexible nano generator comprises the following assembly steps:
the liquid PDMS with bubbles removed in advance is injected into a self-made glass mould, and is heated for 20min at 120 ℃ to obtain the arch bridge-shaped block shown in figure 1. The cured PDMS (3X 4X 0.3 cm) was peeled off for use, and the dimensions of the inner groove were 2X 4X 0.3cm. An aluminum foil electrode was attached to one side of the upper plane of PDMS, and a cut Whatman filter paper (3X 4 cm) was attached to one side of the arch. A PANI film (2X 4 cm) prepared in advance is stuck on the other side of the filter paper, and then an aluminum foil electrode (2X 4 cm) is stuck on the other side of the filter paper.
Wherein, the structure of Whatman filter paper 1 is shown in FIG. 3, and the size of the indication area 2 is 1.5X2 cm; the channel 3 has a size of 2X 0.3cm; the size diameter of the liquid area 4 to be measured is 0.3cm.
Example 3
The self-generating flexible nano generator comprises the following assembly steps:
the liquid PDMS with bubbles removed in advance is injected into a self-made glass mould, and is heated for 10min at 120 ℃ to obtain the arch bridge-shaped block shown in figure 1. The cured PDMS (2.5X3X0.5 cm) was peeled off for use, and the dimensions of the inner groove were 2X 3X 0.3cm. A copper foil electrode is stuck on one side of the upper plane of the PDMS, and a cut Whatman filter paper (2.5X3 cm) is stuck on one side of the arch shape. A PANI film (1X 3 cm) prepared in advance is stuck on the other side of the filter paper, and a copper foil electrode (1X 3 cm) is stuck on the other side of the filter paper.
Wherein, the structure of Whatman filter paper 1 is shown in FIG. 3, and the size of indication area 2 is 1X 2cm; the channel 3 has a size of 0.3X0.5 cm; the size diameter of the liquid area 4 to be measured is 0.6cm.
In application, the test solution containing glucose (100 mg/L glucose test solution: 1mg glucose in 10mL PBS buffer; 500mg/L glucose test solution: 5mg glucose in 10mL PBS buffer) is added dropwise to the test solution region on Whatman filter paper, and the electric signal is read after 15 s. The test results are shown in FIG. 4, and it can be seen from FIG. 4 that the current tends to decrease as the glucose concentration increases.
Example 4
The self-generating flexible nano generator comprises the following assembly steps:
the liquid PDMS with bubbles removed in advance is injected into a self-made glass mould (figure 5), and heated for 15min at 120 ℃ to obtain the arch bridge-shaped block shown in figure 1. The cured PDMS (2X 2.5X 0.3 cm) was peeled off for use, and the dimensions of the inner groove were 1.8X2.5X 0.3cm. A copper foil electrode is stuck on one side of the upper plane of the PDMS, and a cut Whatman filter paper (2X 2.5 cm) is stuck on one side of the arch shape. And a polypyrrole film (1 multiplied by 2.5 cm) prepared in advance is stuck on the other side of the filter paper, and then a copper foil electrode (1 multiplied by 2.5 cm) is stuck on the other side of the filter paper, so that the self-generating flexible nano generator is prepared as shown in figures 1 and 2.
Wherein, the structure of Whatman filter paper 1 is shown in FIG. 3, and the size of indication area 2 is 1X 1cm; the channel 3 has a size of 1X 0.2cm; the size diameter of the liquid area 4 to be measured is 0.5cm.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (13)
1. The utility model provides a from flexible nanometer generator of electricity generation which characterized in that, from flexible nanometer generator of electricity generation includes from top to bottom in proper order: a first electrode layer, an arch bridge type block, whatman filter paper, a conductive film and a second electrode layer;
the arch bridge-shaped block comprises two supporting tables and a vibrating top surface, and two sides of the vibrating top surface are respectively fixed with the two supporting tables;
the two supporting tables and the vibrating top surface are enclosed to form a hollow groove;
the vibrating top surface rubs with the Whatman filter paper when vibrating in the groove;
the surface of the arch bridge-shaped block is provided with an adsorption electron layer;
the Whatman filter paper is provided with a liquid area to be measured, a channel and an indication area along the length direction;
one end of the channel is connected with the liquid area to be measured;
the other end of the channel is connected with the indication area;
the liquid area to be measured, the channel and the indication area are opposite to the vibration top surface.
2. The self-generating flexible nano-generator according to claim 1, wherein,
the indication area and the liquid area to be measured are both round,
the diameter of the indication area is 0.1-3 cm;
the width of the channel is 0.1-2 cm, and the length of the channel is 0.1-1.5 cm;
the diameter of the liquid area to be measured is 0.1-3 cm.
3. The self-generating flexible nano-generator according to claim 1, wherein the indication area is rectangular, the liquid area to be measured is circular,
the width of the indication area is 0.1-5 cm, and the length of the indication area is 0.1-5 cm;
the width of the channel is 0.1-2 cm, and the length of the channel is 0.1-1.5 cm;
the diameter of the liquid area to be measured is 0.1-3 cm.
4. The self-generating flexible nano-generator of claim 1, wherein the conductive film is a polymeric conductive film;
the polymer conductive film comprises any one of polyaniline film, polypyrrole film and polythiophene film.
5. The self-generating flexible nano-generator of claim 1, wherein the conductive film covers the indicator region.
6. The self-generating flexible nano-generator of claim 1, wherein the arch-bridge shaped block is made of a polymer with electronegativity greater than 8.
7. The self-generating flexible nano-generator according to claim 1, wherein the arch-bridge-shaped block is made of at least one material selected from PDMS, PTFE, PVDF and silicone rubber.
8. The self-generating flexible nano-generator of claim 1, wherein the dimensions of the arch-bridge shaped block are: the length is 2-50 cm; the width is 2-50 cm; the thickness is 0.02-0.2cm.
9. The self-generating flexible nano-generator of claim 1, wherein the grooves are of a cubic structure;
the size of the groove is as follows: the length is 0.1-10cm; the width is 0.1-10cm; the height is 0.02-0.2cm.
10. The self-generating flexible nano-generator of claim 1, wherein the first electrode and the second electrode are independently selected from any one of a copper electrode and a platinum electrode.
11. The self-generating flexible nano-generator according to claim 4, wherein the preparation method of the polyaniline film comprises:
and immersing the PI film into an acidic reaction system containing aniline, p-toluenesulfonic acid, ammonium persulfate and a hydrophilic polymer for reaction to obtain the polyaniline film.
12. A method for detecting the concentration of glucose in a solution, characterized in that the concentration of glucose in the solution is detected by using the self-generating flexible nano-generator according to any one of claims 1 to 11.
13. The method according to claim 12, characterized in that the method comprises: and under the external vibration, detecting the concentration of glucose in the solution by using the self-generating flexible nano generator.
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