CN113949305A - Preparation method of graphene micro-wrinkle friction nano generator - Google Patents
Preparation method of graphene micro-wrinkle friction nano generator Download PDFInfo
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- CN113949305A CN113949305A CN202110497500.0A CN202110497500A CN113949305A CN 113949305 A CN113949305 A CN 113949305A CN 202110497500 A CN202110497500 A CN 202110497500A CN 113949305 A CN113949305 A CN 113949305A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229920000431 shape-memory polymer Polymers 0.000 claims abstract description 22
- 239000002783 friction material Substances 0.000 claims abstract description 19
- 239000002033 PVDF binder Substances 0.000 claims abstract description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 6
- 229920000642 polymer Polymers 0.000 claims abstract 3
- 238000011084 recovery Methods 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 230000009477 glass transition Effects 0.000 claims description 4
- -1 polypropylene carbonate Polymers 0.000 claims description 4
- 229920000379 polypropylene carbonate Polymers 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000010248 power generation Methods 0.000 claims 1
- 210000002469 basement membrane Anatomy 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 210000004379 membrane Anatomy 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/0009—Structural features, others than packages, for protecting a device against environmental influences
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00134—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems comprising flexible or deformable structures
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1436—Composite particles, e.g. coated particles
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- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
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- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention designs a preparation method of a graphene micro-wrinkle friction nano generator. Includes a preparation method of a shape memory polymer/graphene (rGO) micro-corrugated positive friction material for friction nano-generators (TENGs). The utility model is mainly characterized in that the different appearance rGO that prepare on shape memory polymer substrate is little folded as anodal friction material, polyvinylidene fluoride (PVDF) is negative pole friction material, through the different proportion of replying of control polymer, obtain different appearance rGO little folded, compare in the rGO of ordinary planar structure, little folded structure has increased the friction contact area, be favorable to increasing the quantity of transfer electron, thereby the output performance of TENGs has been improved by a wide margin, it is good to adhere to with the basement membrane through its unique little folded structure simultaneously, it is not fragile, the service life of the device is prolonged.
Description
Technical Field
The invention designs a preparation method of a graphene micro-wrinkle friction nano generator. Includes a preparation method of a shape memory polymer/graphene (rGO) micro-corrugated positive friction material for friction nano-generators (TENGs). Relate to the fold and rub the nanometer generator field a little, concretely relates to different appearance graphite alkene (rGO) that prepare on biodegradable shape memory polymer base fold as anodal friction material, polyvinylidene fluoride (PVDF) is negative pole friction material, through the different proportion of replying of control shape memory polymer, obtains different appearance rGO fold a little to improve TENG's output electrical property.
Background
A micro-wrinkle is a structure formed by two films of different modulus bonded together, which are subjected to a certain stimulus to generate different deformation amounts. Because the deformation quantity between the two films is different, stress can be generated between the two interfaces, and when the stress value exceeds the critical stress for buckling the films, a fold structure can be generated on the films with large deformation degree. Triboelectric nanogenerators (TENGs) are devices that convert mechanical energy into electrical energy based on the coupling of triboelectric and electrostatic induction effects. When two different materials are brought into contact with each other under the drive of an external force, electrostatic charges of opposite signs are generated at the contact surfaces. When the two contact surfaces are separated under the action of external force, the separation of positive and negative static charges can generate a potential difference, and electrons are driven to flow between the two electrodes through an external circuit. In the previous research, graphene is used for a friction material, the output electric signal is not strong, the graphene is made into a micro-fold structure through the shape memory polymer and then used for constructing TENGs, and the output electric performance of the TENGs is greatly improved.
Problems to be solved by the invention
The graphene friction nano generator prepared at present is of a planar structure, so that the friction area is small, and the service life is relatively short. The invention provides a biodegradable shape memory polymer/rGO (graphene oxide) micro-wrinkle integrated body as a positive electrode friction material, and the micro-wrinkle structure of the biodegradable shape memory polymer/rGO micro-wrinkle integrated body increases the contact area with a negative electrode friction material, and is beneficial to increasing the quantity of transferred electrons, so that the output performance of a rGO friction nano-generator is increased. And the micro-fold structure is formed on the biodegradable shape memory polymer film, and is well adhered to the basement membrane through the unique structure, so that the micro-fold structure is not easy to damage, and the service life of the micro-fold structure is prolonged.
Disclosure of Invention
The invention provides a preparation method of biodegradable shape memory polymer/rGO (graphene oxide) micro-folds integrally used as a positive electrode friction material for TENGs (Tengs), which has the following technical scheme:
1. preparation of biodegradable shape memory polymer/rGO micro-folds
When the temperature is higher than the glass transition temperature of the shape memory polymer, the two ends of the pre-stretched biodegradable shape memory polymer/rGO membrane are clamped on a tensile machine, after different deformation recovery quantities of the membrane are controlled, the temperature is reduced to be lower than the glass transition temperature of the membrane for fixed deformation, and graphene micro-folds with different shapes are manufactured. The amount of recovery deformation is 10-300%. Biodegradable shape memory polymers include shape memory polylactic acid (SMPLA), shape memory polycaprolactone (smclc), shape memory polypropylene carbonate (SMPPC).
rGO micropleats for construction of TENGs
The biodegradable shape memory polymer/rGO micro-folds are used as a positive electrode of a friction material, aluminum is used as an electrode of the friction material, a negative electrode friction material is PVDF, the aluminum is used as an electrode, leads are respectively led out from the two electrodes so as to be connected with an external testing instrument, and a vertical contact-separation type rGO micro-fold friction nano-generator is constructed. And applying a constant force of 1-10N to the outside, acting on the nano generator, and testing the output current and voltage of the nano generator.
The invention has the advantages of
Compared with the common planar structure rGO, the micro-wrinkle structure increases the friction contact area and is beneficial to increasing the quantity of transferred electrons, so that the output performance of TENGs is greatly improved, and meanwhile, the biodegradable shape memory polymer/rGO is well adhered to a base film through the unique micro-wrinkle structure, is not easy to damage and prolongs the service life of the TENGs.
Detailed Description
The present invention will be further described with reference to specific examples.
Example 1:
the preparation method of the shape memory polypropylene carbonate (SMPPC)/rGO micro-wrinkle by controlling the recovery deformation comprises the following steps: clamping two ends of a pre-stretched SMPPC/rGO membrane on a tensile machine, controlling the recovery deformation amount of the membrane to be 0%, 50%, 100% and 150% respectively at the temperature of 40 ℃ (about the PPC vitrification temperature of 30 ℃), and then reducing the temperature to 5 ℃ for fixing deformation to prepare rGO micro-folds with different shapes and sizes.
SMPPC/rGO micropleats were used to construct TENGs as follows: and (3) taking SMPPC/rGO micro-folds as a positive electrode friction material, taking aluminum as a positive electrode, taking a negative electrode friction material as PVDF (polyvinylidene fluoride), taking aluminum as a negative electrode, respectively leading out wires on the two electrodes, and manufacturing the rGO micro-fold friction nano-generator. And finally, acting on the nano generator with a constant force of 3N, and testing the output current and voltage of the nano generator. And (3) performance test results:
testing output current and voltage of the rGO micro-wrinkle friction nano generator: the output current and voltage of the rGO micro-corrugated nano generator under the conditions of 0%, 50%, 100% and 150% of the recovery deformation are respectively measured, as shown in (a) and (b) of fig. 1, the output current and voltage of the rGO micro-corrugated friction nano generator under the condition of 150% of the recovery deformation are respectively 12 times and 6 times of 0%, and the maximum value can reach 60 muA and 35V.
Drawings
FIG. 1 shows the output current and voltage of a graphene micro-wrinkle friction nano-generator under different deformation recovery quantities;
FIG. 1(a) graph of output current for SMPPC/rGO micropleated TENG at different draw ratios (0%, 50%, 100%, 150%);
FIG. 1(b) graph of output voltage for SMPPC/rGO micropleated TENG at different draw ratios (0%, 50%, 100%, 150%).
Claims (8)
1. A preparation method of a graphene micro-wrinkle friction nano generator is characterized by comprising the following steps:
(1) the preparation method is used for preparing the micro-folded whole body of the shape memory polymer/graphene (rGO) of the friction nano-generator (TENGs) as the positive friction material: when the temperature is higher than the glass transition temperature of the polymer, clamping two ends of the pre-stretched polymer/rGO film on a tensile machine, controlling different deformation recovery amounts of the film, reducing the temperature to be lower than the glass transition temperature of the film, and fixing the deformation to prepare graphene micro-folds with different morphologies;
(2) preparation of triboelectric nanogenerators (TENGs): taking shape memory polymer/rGO micro-folds as a positive electrode of a friction material, taking aluminum as an electrode of the friction material, taking a negative electrode of PVDF as a friction material, taking aluminum as an electrode, respectively leading out wires on the two electrodes so as to connect with an external test instrument, and constructing a vertical contact-separation type rGO micro-fold friction nano-generator; wherein, constant force is applied to the nano generator from the outside to test the output current and voltage of the nano generator.
2. The graphene micro-corrugated triboelectric nanogenerator of claim 1, wherein: the shape memory polymer is shape memory polypropylene carbonate (SMPPC).
3. The graphene micro-corrugated triboelectric nanogenerator of claim 1, wherein: the thickness of the shape memory polymer film is 0.05-0.5 mm.
4. The graphene micro-corrugated triboelectric nanogenerator of claim 1, wherein: the thickness of the graphene coating of the shape memory polymer film is 0.01-0.05 mm.
5. The graphene micro-corrugated triboelectric nanogenerator of claim 1, wherein: the stretch ratio of the shape memory polymer film is 10-300%.
6. The graphene micro-corrugated triboelectric nanogenerator as described in claim 1 or 2, wherein: the SMPPC/rGO membrane has a deformation recovery amount of 10-300%.
7. The graphene micro-corrugated triboelectric nanogenerator as described in claim 1 or 2, wherein: the fixed deformation temperature is between 30 and 90 ℃.
8. The vertical contact-separation type rGO micro-corrugated friction nano-generator according to claim 1 or 2, wherein the current and voltage output by power generation is performed under the action of a constant force of 1-10N.
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|---|---|---|---|---|
| WO2015004231A1 (en) * | 2013-07-10 | 2015-01-15 | Universitat Autonoma De Barcelona | Electrode for a nanogenerator with a piezoelectric material made of nanowires |
| CN106877732A (en) * | 2017-03-17 | 2017-06-20 | 中国科学院半导体研究所 | Friction generator and preparation method based on fold conductive film, integrated morphology |
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-
2021
- 2021-05-08 CN CN202110497500.0A patent/CN113949305B/en active Active
Patent Citations (8)
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| WO2015004231A1 (en) * | 2013-07-10 | 2015-01-15 | Universitat Autonoma De Barcelona | Electrode for a nanogenerator with a piezoelectric material made of nanowires |
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| CN106877732A (en) * | 2017-03-17 | 2017-06-20 | 中国科学院半导体研究所 | Friction generator and preparation method based on fold conductive film, integrated morphology |
| CN108011539A (en) * | 2017-12-07 | 2018-05-08 | 苏州大学 | Flexible electrode and preparation method thereof, friction nanometer power generator and preparation method thereof |
| CN109586608A (en) * | 2018-11-08 | 2019-04-05 | 北京化工大学 | A kind of flexible extensible single electrode friction nanometer power generator and preparation method thereof |
| CN111328182A (en) * | 2018-12-13 | 2020-06-23 | 哈尔滨工业大学 | Deformed circuit board based on shape memory polymer composite material |
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Non-Patent Citations (4)
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