CN107663276B - Nano particle-high molecular polymer composite electret film, preparation method thereof and friction nano generator containing film - Google Patents
Nano particle-high molecular polymer composite electret film, preparation method thereof and friction nano generator containing film Download PDFInfo
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- CN107663276B CN107663276B CN201610615951.9A CN201610615951A CN107663276B CN 107663276 B CN107663276 B CN 107663276B CN 201610615951 A CN201610615951 A CN 201610615951A CN 107663276 B CN107663276 B CN 107663276B
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J5/18—Manufacture of films or sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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Abstract
The invention discloses a nano particle-high molecular polymer composite electret film, a preparation method thereof and a friction nano generator containing the film. According to the preparation method, the nano particle-high molecular polymer composite electret film is obtained through the steps of raw material preparation, uniform dispersion, film formation and heat treatment. The friction nano-generator according to the invention contains the nano-particle-high molecular polymer composite electret film according to the invention.
Description
Technical Field
The invention relates to the field of electret films, in particular to a nano particle-high molecular polymer composite electret film, a preparation method thereof and a friction nano generator containing the film.
Background
The High Molecular Polymer (HMPs) electret material has excellent electret performance and reliable chemical stability, is not easy to react with strong acid, strong base and strong oxidant, and is stable to common solvents. At present, the surface morphology of commercial HMPs films is mostly a spider-web-shaped microporous structure, the films have certain waterproof performance, but the films do not have the super-hydrophobic function of moisture prevention and moisture prevention, and the electret performance in a water immersion or humid environment is obviously reduced. In addition, due to the limitation of the existing film processing conditions, the thickness of the commercial film is usually within the range of 30-100 um, only a small amount of the commercial film is between 10-20 um and the price is expensive, and the commercial film can not be purchased nearly when the thickness is less than 10 um.
With the continuous and deep exploration of triboelectric and piezoelectric devices, the hydrophobicity, specification and electret performance of the existing HMPs electret materials cannot meet the more advanced requirements. In order to improve the power generation performance of the friction nano-generator and the self-driven sensing device, the electrode can be formed by an electret film adhered to an aluminum or copper sheet, the quantity of transferred charges can be greatly improved after corona charging, and the effect is more obvious along with the reduction of the film thickness; however, in general, it is difficult to directly bond the HMPs electret films to the metal, and in order to increase the adhesion between the HMPs and the metal, an adhesion layer is generally required to be additionally coated between the metal and the HMPs, or a metal conductive layer is directly evaporated or sputtered on the HMPs film through a complicated vacuum device, the former affects the performance of the generator and the sensor, and the latter is not favorable for industrial popularization.
At present, although there are researches on optimizing the performance of electret materials and preparation processes thereof through doping at home and abroad, no relevant report exists on the research on improving the performance of electret films by compounding Nano Particles (NPs) with HMPs, and the preparation method and application of the electret films are a mature technology which can not be used for reference.
Disclosure of Invention
The invention provides a nano particle-high molecular polymer composite electret film and a preparation method thereof, which solve the problem that the electret performance is reduced due to poor hydrophobic property of the electret film in the prior art; the invention also provides a friction nano generator containing the nano particle-high molecular polymer composite electret film, which obviously improves the working performance of the generator.
According to one aspect of the present invention, a method for preparing a nanoparticle-high molecular polymer composite electret film is provided, which is characterized by comprising the following steps:
raw material preparation: preparing a nanoparticle dispersion liquid and a high molecular polymer dispersion liquid;
and (3) uniformly dispersing: mixing the nanoparticle dispersion liquid and the high molecular polymer dispersion liquid according to a certain weight ratio, and then uniformly dispersing and compounding to obtain a nanoparticle-high molecular polymer composite dispersion liquid;
a film forming step: forming a film on the substrate subjected to surface treatment by using the nano particle-high molecular polymer composite dispersion liquid to obtain a film-formed test piece;
a heat treatment step: and (3) preserving the temperature of the test piece at 100-390 ℃ for 30-90 min, and then cooling to room temperature.
Optionally, according to the preparation method of the present invention, the ratio of the nanoparticle dispersion liquid to the high molecular polymer dispersion liquid is 1-30%: 70-99% by weight.
Optionally, according to the preparation method of the present invention, the nanoparticle is a nanoparticle of metal, semiconductor, graphene, carbon.
Optionally, according to the preparation method, the size of the nanoparticle is 1-200 nm.
Alternatively, according to the preparation method of the invention, the high molecular polymer is polytetrafluoroethylene, soluble polytetrafluoroethylene, polyperfluoroethylene, polypropylene, polyethylene, polyvinylidene fluoride, polychlorotrifluoroethylene, polycarbonate, polyester.
Optionally, according to the preparation method of the present invention, the nanoparticle dispersion has a solid content of > 5% wt, and the high molecular polymer dispersion has a solid content of > 30% wt.
Alternatively, according to the preparation method of the present invention, in the step of uniformly dispersing, the uniformly dispersing and compounding operation is: and magnetically stirring the mixed nanoparticle dispersion liquid and the high molecular polymer dispersion liquid at room temperature for 10-60 min, and ultrasonically compounding the mixture for 10-60 min under the conditions that the temperature is 30-45 ℃ and the power is 60-100W.
Alternatively, according to the manufacturing method of the present invention, the surface-treated substrate is obtained by: sequentially carrying out surface treatment processes of acetone oil removal and degreasing, deionized water cleaning, phosphate solution phosphating, deionized water cleaning, passivation treatment and low-temperature blow drying.
Alternatively, according to the production method of the present invention, the substrate base is a metal foil.
Optionally, according to the preparation method of the present invention, in the film forming step, a spin-on film forming process is used to form a film.
Optionally, according to the preparation method of the present invention, before the heat treatment step, the method further includes a drying step: and drying the test piece at 60-120 ℃ to remove the solvent, and curing for 10-60 min.
According to another aspect of the invention, a nanoparticle-high molecular polymer composite electret film prepared by the preparation method is provided.
According to another aspect of the present invention, there is provided a triboelectric nanogenerator comprising a nanoparticle-high molecular polymer composite electret film according to the present invention.
Optionally, according to the friction nanogenerator of the invention, the friction nanogenerator is assembled by the following steps:
carrying out constant-voltage corona charging on the substrate with the nano particle-high molecular polymer composite electret film after heat treatment by a corona polarization device under the conditions of room temperature and relative humidity RH of 40-60%; wherein, the substrate adopts a metal sheet;
the metal sheet with the nano particle-high molecular polymer composite electret film after corona charging is used as one electrode of the friction nano generator and is assembled with the other counter electrode to form the contact-separation type friction nano generator.
Optionally, in the constant-voltage corona charging, a charging needle point connected to a high-voltage power supply is aligned with the nanoparticle-high polymer composite electret film, and a metal surface not covered by the film is connected to the other electrode of the high-voltage power supply, wherein the distance between the charging needle point and the film is 10-50 mm, the needle pressure is- (3-6 KV), and the charging time is 1-10 min.
The invention has the following beneficial effects:
(1) after HMPs and NPs are uniformly dispersed, a film can be directly formed on a metal sheet subjected to surface treatment, and the NPs content and the thickness of the NPs-HMPs composite electret film can be accurately controlled between 2 and 10 mu m;
(2) the microporous structure formed by the existing HMPs film processing technology is basically eliminated, the NPs-HMPs composite electret film has uniform and smooth surface, has the moisture-proof and moisture-proof super-hydrophobic functions, and has good transparency;
(3) the preparation process and equipment of the NPs-HMPs composite electret film are simple;
(4) in the aspect of application embodiment, the composite electret film is assembled into a contact-separation type friction nano generator (TENG) after being subjected to corona charging, and the open-circuit voltage, the short-circuit current, the transferred charge quantity and the working stability of the TENG are tested, so that the test result is obviously superior to that of the conventional commercial HMPs film; the NPs-HMPs composite electret film still has higher electret performance after being soaked or washed and dried by water, and the generating performance of TENG is not obviously reduced.
Drawings
FIG. 1 is a schematic flow chart of a method for preparing a nanoparticle-high molecular polymer composite electret film according to the invention;
FIG. 2 is a process for preparing NPs-HMPs composite dispersions according to the preparation method of the present invention;
FIG. 3 is a process of forming a composite electret thin film of NPs-HMPs in the preparation method of the present invention;
FIG. 4 is a process of a corona polarization process for NPs-HMPs composite electret films in the preparation method of the present invention; and
FIG. 5 shows the assembly and testing of the triboelectric nanogenerator of the invention.
Detailed Description
The present invention will now be described with reference to the following detailed description, which is to be construed as illustrative only and not limiting in any way.
According to an aspect of the present invention, there is provided a method for preparing a nanoparticle-high molecular polymer composite electret film, the preparation process is shown in fig. 1, and the method comprises the following steps:
s1, raw material preparation: preparing a nanoparticle dispersion liquid and a high molecular polymer dispersion liquid;
s2, a uniform dispersion step: mixing the nano particle dispersion liquid and the high molecular polymer dispersion liquid according to a certain weight ratio, and then uniformly dispersing and compounding to obtain a nano particle-high molecular polymer composite dispersion liquid; preferably, the ratio of the nanoparticle dispersion to the high molecular polymer dispersion is 1-30%: 70-99% by weight.
S3, film formation step: forming a film on the substrate subjected to surface treatment by using the nano particle-high molecular polymer composite dispersion liquid to obtain a film-formed test piece; the substrate can be any commonly used substrate, such as a silicon wafer, glass, metal foil, and the like;
and (3) drying: drying the test piece at 60-120 ℃, removing the solvent, and then curing for 10-60 min;
s4, heat treatment step: and (3) preserving the temperature of the cured test piece at 100-390 ℃ for 30-90 min, and then cooling to room temperature.
Wherein, the drying step is not an essential step, and the curing can be carried out by drying at room temperature.
The nanoparticle dispersion and the polymer dispersion are dispersions of nanoparticles and a polymer in water. Preferably, the nanoparticle dispersion has a solid content of > 5% wt and the high molecular polymer dispersion has a solid content of > 30% wt.
According to the preparation method of one embodiment of the present invention, the nanoparticles are nanoparticles of various materials such as metal, semiconductor, graphene, carbon, and the like. In the present invention, a single type of nanoparticles may be selected and used, or a plurality of types of nanoparticles may be selected and added in a mixed manner. The size range of the nano particles is 1-200 nm.
According to the preparation method of one embodiment of the present invention, the high molecular polymer may adopt an organic molecular material having a charge storage property after polarization, such as Polytetrafluoroethylene (PTFE), soluble Polytetrafluoroethylene (PFA), Fluorinated Ethylene Propylene (FEP), polypropylene (PP), Polyethylene (PE), polyvinylidene fluoride (PVDF), Polychlorotrifluoroethylene (PCTFE), polycarbonate, polyester (PETP), and the like.
According to the preparation method of one embodiment of the invention, the nanoparticle dispersion liquid and the high molecular polymer dispersion liquid are uniformly dispersed by magnetic stirring and ultrasonic technology, and the preparation method specifically comprises the following steps: and magnetically stirring the mixed nano particle dispersion liquid and the high molecular polymer dispersion liquid at room temperature for 10-60 min, ultrasonically compounding for 10-60 min under the conditions that the temperature is 30-45 ℃ and the power is 60-100W, standing for 5-30 min, and defoaming for later use.
According to the manufacturing method of one embodiment of the present invention, the substrate used is a metal foil. The surface-treated metal sheet is obtained by the following steps: processing a metal sheet with the thickness of 0.2-1 mm into a square with the side length of 10-80 mm, and then sequentially carrying out surface treatment processes of oil removal and degreasing by acetone, cleaning by deionized water, phosphating by a phosphate solution, cleaning by deionized water, passivation treatment and low-temperature blow drying. Then, the processed metal sheet is used as a substrate of the NPs-HMPs composite electret film, and the film is directly formed on the surface of the metal sheet. The metal used is an inexpensive conductive metal material such as aluminum or copper.
According to the preparation method of the present invention, a spin coating film forming process may be used to directly form a film on a metal sheet, or other liquid film forming methods may be selected to form a film, for example, a film may be formed by dipping or the like. In one embodiment of the present invention, the spin-on film formation process is used to form a film. Specifically, the spin coating film forming process comprises the following steps: fully soaking the surface-treated metal sheet in NPs-HMPs composite dispersion liquid and then adsorbing the metal sheet on spin-coating equipment; under the condition of room temperature, the NPs-HMPs composite dispersion liquid is dripped in the center of the metal sheet; spin coating at a low speed of 300-800 rpm/min for 3-10 s, and spin coating at a high speed of 1200-3000 rpm/min for 20-60 s. The test piece formed by spin coating is obtained after three process stages of glue dripping, expansion and spin separation in sequence.
According to the preparation method of the invention, in the drying step, the obtained test piece is placed on an electric heating plate, a layer of aluminum foil can be covered between the electric heating plate and the test piece, the NPs-HMPs composite electret film faces upwards, and the metal sheet which is not covered with the film faces downwards for drying treatment.
According to the preparation method, in the heat treatment step, the dried and cured test piece can be placed into a high-temperature blast drying oven, the temperature is raised to the preset heat treatment temperature of 100-390 ℃ at the speed of 5-20 ℃/min for heat treatment, and the temperature is cooled to the room temperature along with the furnace after the heat preservation is finished. Through the heat treatment process of crystallization film forming, the vacuumizing or inert gas protection is properly selected according to the thermal stability of the metal sheet substrate.
According to another aspect of the invention, a nanoparticle-high molecular polymer composite electret film prepared by the preparation method is provided.
The preparation method takes NPs and HMPs dispersion liquid as raw materials, and obtains the NPs-HMPs composite dispersion liquid after uniform dispersion through magnetic stirring and ultrasonic technology; taking a metal sheet subjected to surface treatment as a film forming substrate; the NPs-HMPs composite dispersion liquid is directly formed into a film on a metal sheet through processes of spin coating, drying and heat treatment, the surface is smooth, continuous and uniform, the NPs content and the film thickness are accurate and controllable within the range of 2-10um, the prepared composite electret film is good in adhesive force, the electret performance and the hydrophobicity are greatly improved, and the composite electret film has good transparency. The invention has novel thought and reasonable process route, the NPs-HMPs composite electret film not only has the existing characteristics of the electret film, but also greatly improves the electret performance, water resistance and moisture resistance, can realize direct film formation on a metal sheet, has controllable film thickness, and meets the use requirement of film adhesion force.
According to still another aspect of the present invention, there is provided a triboelectric nanogenerator comprising a nanoparticle-high molecular polymer composite electret film according to the invention. Wherein, the nano particle-high molecular polymer composite electret film is used as an electrode of the friction nano generator after corona charging.
Specifically, the friction nano-generator is assembled by the following steps: carrying out constant-voltage corona charging on the substrate with the NPs-HMPs composite electret thin film after heat treatment by a corona polarization device under the conditions of room temperature and relative humidity RH of 40-60%; wherein, the substrate is a metal sheet; and (3) taking the corona-charged metal sheet with the NPs-HMPs composite electret film as one electrode of the friction nano-generator, and assembling the metal sheet and the other counter electrode into a contact-separation type friction nano-generator. Wherein, the other electrode adopts a metal sheet with the same specification as that of the metal sheet with the NPs-HMPs composite electret film, and can adopt a sheet made of cheap conductive metal materials such as aluminum, copper and the like.
More specifically, in constant voltage corona charging, a charging needle point connected with a high-voltage power supply is aligned with an NPs-HMPs composite electret film, a metal surface not covered with the film is connected to the other electrode of the high-voltage power supply, wherein the distance between the charging needle point and the film is 10-50 mm, the needle pressure is- (3-6 KV), the charging time is 1-10 min, and the charging surface is the whole square area of a metal sheet.
The open-circuit voltage, the short-circuit current, the transfer charge quantity and the stability of the friction nano generator are tested, and the result is obviously superior to that of commercial HMPs films with the same specification; the NPs-HMPs composite electret film still has higher electret performance after being soaked or washed and dried by water, and the TENG power generation performance is not obviously reduced.
In summary, the NPs-HMPs composite electret films, the preparation method thereof and the friction nano-generator according to the present invention have a large number of optional factors, and different embodiments can be combined by using the claims of the present invention, and the following description will be made with specific embodiments.
In the embodiment, gold nanoparticles are selected as the nanoparticles, and polytetrafluoroethylene is selected as the high molecular polymer. The preparation method comprises the following steps of preparing uniformly dispersed gold nanoparticle-polytetrafluoroethylene (Au-PTFE) composite dispersion liquid according to a ratio, directly spin-coating the gold nanoparticle-polytetrafluoroethylene (Au-PTFE) composite dispersion liquid on a surface-treated aluminum sheet (Al) to form a film, wherein the surface of the Au-PTFE composite electret film is required to be smooth, continuous and uniform, the thickness of the Au-PTFE composite electret film is 4-6 um, the electret performance is greatly improved after corona charging, the Au-PTFE composite electret film has super-hydrophobicity, the adhesive force between the Au-PTFE composite film and an aluminum sheet substrate can meet the use requirement, and the embodiment is further described in detail with reference to the process flows shown:
carrying out the step
(1) Preparing raw materials: as shown in fig. 2, PTFE dispersion with solid content > 30% wt and gold (Au) nanoparticle dispersion with solid content > 5% wt were prepared several times.
(2) Uniformly dispersing: as shown in figure 3, the PTFE dispersion and the gold Au nanoparticle dispersion are mixed according to the ratio of 95% to 5%, and are ultrasonically compounded for 30min under the conditions that the temperature is 35 ℃ and the power is 80W after being magnetically stirred for 20min at room temperature, so as to obtain the Au-PTFE composite dispersion. Standing the composite dispersion liquid for 10min, and then defoaming for later use.
(3) Substrate preparation: as shown in fig. 3, an Al sheet with a thickness of 0.2mm is processed into a square with a side length of 50mm, and the square is used as a substrate of an Au-PTFE composite electret film after surface treatment processes of oil removal and grease removal by acetone, cleaning by deionized water, phosphating by a phosphate solution, cleaning by deionized water, passivation treatment and low-temperature blow drying in sequence, and a film is directly formed on the surface of the Al sheet.
(4) Spin coating to form a film: as shown in FIG. 3, the Al foil after surface treatment is fully soaked in the Au-PTFE dispersion liquid and then is adsorbed on a spin coating device, under the condition of room temperature, the Au-PTFE composite dispersion liquid is firstly dripped in the center of the metal foil, then the metal foil is spin-coated for 6s at low speed of 500rpm and spin-coated for 30s at high speed of 1500rpm, and the test piece formed by spin coating is obtained through three process stages of glue dripping, spreading and spin-off in sequence.
(5) Drying treatment: as shown in figure 3, immediately placing the above test piece on an electric heating plate, covering a layer of aluminum foil between the heating plate and the test piece, making one surface of the Au-PTFE composite electret film face up and the other surface not covered with the film face down, drying at 90 ℃, quickly removing the solvent and curing, wherein the processing time is 30 min.
(6) And (3) heat treatment: as shown in figure 3, the dried test piece is put into a high-temperature forced air drying oven for crystallization film-forming heat treatment, the temperature is raised to 380 ℃ at the speed of 10 ℃/min, and the temperature is kept for 60min and then cooled to room temperature along with the furnace.
(7) Corona charging: as shown in fig. 4, the heat-treated test piece was subjected to constant voltage corona charging at room temperature and 50% RH by a self-contained corona polarizer, the charging tip connected to a high voltage power supply was aligned with the Au-PTFE composite electret film, the Al sheet not covered with the film was connected to the other electrode of the high voltage power supply, wherein the gap between the charging tip and the composite electret film was 40mm, the pin pressure was-5 KV, the charging time was 4min, and the charging surface was the entire square area of the test piece; and finally obtaining the Au-PTFE composite electret film after corona charging.
(8) Assembling the friction nano generator: as shown in fig. 5, the Au-PTFE composite electret film sample after corona charging is used as one electrode of a friction nano-generator (TENG), and an Al sheet with the same specification is prepared as a counter electrode to assemble a contact-separation type TENG. After 2000 cycles of continuous operation, the TENG shows higher stability, the average values of the open-circuit voltage, the short-circuit current and the transferred charge quantity are 198V, 28.2uA and 121nC, and compared with a generator using the conventional commercial HMPs film, various performance parameters are greatly improved. And the electret performance of the Au-PTFE composite film can still be maintained above 80% after the Au-PTFE composite film is soaked or washed and dried, and the TENG power generation performance is not obviously reduced.
In conclusion, the nano particle-high molecular polymer composite electret film with extremely strong electret performance and strong hydrophobicity can be prepared by the preparation method, and the film can be directly formed on a metal sheet, and the thickness of the film is controllable and can reach 2-10um, which is far lower than that of the existing commercial electret film. The composite electret film has wide application prospect in the aspects of friction nano-generator, self-driven sensing and the like.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A friction nanogenerator, characterized in that the friction nanogenerator is assembled by the following steps:
carrying out constant-voltage corona charging on the substrate with the nano particle-high molecular polymer composite electret film after heat treatment by a corona polarization device under the conditions of room temperature and relative humidity RH of 40-60%; wherein, the substrate adopts a metal sheet;
the metal sheet with the nano particle-high molecular polymer composite electret film after corona charging is used as one electrode of a friction nano generator and is assembled with the other counter electrode into a contact-separation type friction nano generator;
the preparation method of the nanoparticle-high molecular polymer composite electret film comprises the following steps:
raw material preparation: preparing a nanoparticle dispersion liquid and a high molecular polymer dispersion liquid;
and (3) uniformly dispersing: mixing the nanoparticle dispersion liquid and the high molecular polymer dispersion liquid according to a certain weight ratio, and then uniformly dispersing and compounding to obtain a nanoparticle-high molecular polymer composite dispersion liquid;
a film forming step: forming a film on the substrate subjected to surface treatment by using the nano particle-high molecular polymer composite dispersion liquid to obtain a film-formed test piece;
a heat treatment step: preserving the temperature of the test piece at 100-390 ℃ for 30-90 min, and then cooling to room temperature;
the nano particle-high molecular polymer composite electret film is a gold nano particle-polytetrafluoroethylene electret film.
2. The triboelectric nanogenerator of claim 1, wherein the nanoparticle dispersion and the high molecular polymer dispersion are present in an amount of 1 to 30%: 70-99% by weight.
3. A triboelectric nanogenerator according to claim 1 or 2, wherein the size of the nanoparticles is 1 to 200 nm.
4. A triboelectric nanogenerator according to claim 1 or 2, wherein the nanoparticle dispersion has a solids content of > 5% wt, the high molecular polymer dispersion has a solids content of > 30% wt.
5. A triboelectric nanogenerator according to claim 1 or 2, wherein in the step of uniformly dispersing, the operation of uniformly dispersing and compounding is: and magnetically stirring the mixed nanoparticle dispersion liquid and the high molecular polymer dispersion liquid at room temperature for 10-60 min, and ultrasonically compounding the mixture for 10-60 min under the conditions that the temperature is 30-45 ℃ and the power is 60-100W.
6. A triboelectric nanogenerator according to claim 1 or 2, wherein the surface-treated substrate is obtained by: sequentially carrying out surface treatment processes of acetone oil removal and degreasing, deionized water cleaning, phosphate solution phosphating, deionized water cleaning, passivation treatment and low-temperature blow drying.
7. The tribo nanogenerator of claim 6, wherein the substrate is a metal foil.
8. A triboelectric nanogenerator according to claim 1 or 2, wherein in the film-forming step, a spin-on film-forming process is used to form the film.
9. The triboelectric nanogenerator of claim 1 or 2, further comprising, prior to the heat treatment step,
and (3) drying: and drying the test piece at 60-120 ℃ to remove the solvent, and curing for 10-60 min.
10. The triboelectric nanogenerator as claimed in claim 1, wherein in the constant voltage corona charging, a charging tip connected to a high voltage power supply is aligned with the nanoparticle-high polymer composite electret film, and a metal surface not covered with the film is connected to the other electrode of the high voltage power supply, wherein the distance between the charging tip and the film is 10-50 mm, the pin pressure is- (3-6 KV), and the charging time is 1-10 min.
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| CN109194184A (en) * | 2018-09-27 | 2019-01-11 | 北京科技大学 | A kind of preparation method of high-energy utilization rate friction nanometer power generator |
| CN111327224B (en) * | 2018-12-17 | 2022-03-18 | 北京纳米能源与系统研究所 | Waterproof electret material, electret method and friction nano-generator |
| CN111245285B (en) * | 2020-03-27 | 2021-08-31 | 北京纳米能源与系统研究所 | Friction generator, manufacturing method thereof and power generation method |
| CN112606509B (en) * | 2020-12-16 | 2023-06-27 | 昆山微电子技术研究院 | Self-polarization composite electret-piezoelectric film, preparation method thereof and piezoelectric film sensor |
| CN112886854B (en) * | 2021-01-29 | 2022-06-24 | 电子科技大学 | Method for improving output performance of friction nano generator, film and preparation method |
| CN115678360B (en) * | 2022-12-29 | 2023-05-09 | 杭州兆华电子股份有限公司 | Preparation method of composite electret and composite electret obtained by preparation method |
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