CN113241965B - Preparation method and application of PDMS (polydimethylsiloxane) attached composite film aluminum foil - Google Patents
Preparation method and application of PDMS (polydimethylsiloxane) attached composite film aluminum foil Download PDFInfo
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- CN113241965B CN113241965B CN202110486713.3A CN202110486713A CN113241965B CN 113241965 B CN113241965 B CN 113241965B CN 202110486713 A CN202110486713 A CN 202110486713A CN 113241965 B CN113241965 B CN 113241965B
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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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
Abstract
A preparation method and application of a PDMS-attached composite film aluminum foil belong to the technical field of nano generators, and particularly relate to a preparation method of a PDMS-attached composite film aluminum foil and a nano generator prepared by using the same. The invention aims to solve the problems of layer staggering and offset in the use process of the conventional hybrid nano generator. The preparation method comprises the following steps: 1. preparing a PDMS solution; 2. doping to obtain a mixed solution; 3. and (4) preparing a membrane to obtain the PDMS composite film aluminum foil. The application is that the aluminium foil adhered with the PDMS composite film and the electrode layer are used as friction electrodes to manufacture the nano generator. The advantages are that: 1. the compact PDMS film is converted into the PDMS composite film with a porous structure, so that the output performance of the nano generator is improved. 2. Avoids the stacking layer upon layer, and has good stability and reliability. The method is mainly used for preparing the nano generator by adhering the PDMS composite film aluminum foil.
Description
Technical Field
The invention belongs to the technical field of nano generators, and particularly relates to a preparation method of a PDMS (polydimethylsiloxane) composite film aluminum foil and a nano generator prepared by using the same.
Background
Wearable electronic devices have been rapidly developed in the past decades, but the problem that power sources cannot be continuously supplied and need to be regularly maintained and replaced becomes one of the bottlenecks limiting the development. The mechanical energy from the human body has strong persistence, and the motion modes of walking, running, even blinking, breathing and the like can be sources of energy. Collecting mechanical energy from the human motion process is an effective way to solve the problem of continuous energy supply of wearable electronic products.
Piezoelectric nano-generators (PENG) and friction nano-generators (TENG) are emerging technologies, and have the advantages of small size, light weight, good biocompatibility, high energy conversion rate and the like, so that the piezoelectric nano-generators and the friction nano-generators become effective ways for collecting weak mechanical energy in human body movement, and are widely concerned by students. Since they all share several unique processes of converting mechanical energy into electrical energy and have similar operating frequencies, matching resistances and output characteristics, the output power of a nanogenerator can theoretically be increased if the two are coupled in a rational manner.
In the past, TENG and PENG are usually made into two independent parts, each layer is processed and assembled respectively, and then the TENG and the PENG are stacked together. The method has the disadvantages of complex process and high cost, and the materials of each layer have different sizes, so that the layers are difficult to fix and align. In the using process, the problems of staggered layers and offset can also occur, and the performance of the nano generator is seriously influenced.
Polydimethylsiloxane (PDMS) has the characteristics of good flexibility, high electronegativity and low manufacturing cost, and is often used as a negative friction layer material of TENG. Because the output performance of TENG is in direct proportion to the contact area of a triboelectric layer, a micro-nano structure is prepared on the surface of a PDMS film to increase the surface area in the past work, such as photoetching, plasma etching and the like, and the methods have complicated steps and expensive equipment and are not suitable for large-scale production. Therefore, developing a high performance, simple structure, the low cost of manufacture's mixed nanometer generator is used for the technical problem who waits to solve now.
Disclosure of Invention
The invention aims to solve the problems of staggered layers and offset in the use process of the existing hybrid nano generator, and provides a preparation method and application of a PDMS (polydimethylsiloxane) composite film attached aluminum foil.
A preparation method of a PDMS composite film aluminum foil comprises the following steps:
1. preparing a PDMS solution: mixing a main agent and a cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10, and the main agent is Sylgard184A produced by Dow Corning company of America; the cross-linking agent is Sylgard184B produced by Dow Corning company;
2. doping: adding barium titanate particles, zinc oxide particles and multi-walled carbon nanotube powder into a PDMS solution, and then magnetically stirring to obtain a mixed solution;
3. film preparation: uniformly coating a layer of mixed liquid on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a mixed liquid film, placing the aluminum foil attached with the mixed liquid film on an etching container in a manner that one side of the mixed liquid film attached with the mixed liquid film is in contact with the surface of the etching groove of the etching container, performing vacuum degassing treatment, and drying to obtain the PDMS (polydimethylsiloxane) composite film aluminum foil.
The application of the PDMS-attached composite film aluminum foil is to use the PDMS-attached composite film aluminum foil and an electrode layer as a friction electrode to manufacture a nano generator, wherein the electrode layer is an aluminum foil, a copper foil, a gold foil, an indium tin oxide film or a titanium dioxide film.
The invention has the advantages that:
1. according to the invention, the Barium Titanate (BTO) particles, the zinc oxide (ZNO) particles and the multi-walled carbon nanotube (MWCNT) powder are doped in the PDMS composite film attached with the PDMS composite film aluminum foil to prepare the BTO/ZNO/PDMS/MWCNT composite film, the compact PDMS film is converted into the PDMS composite film with a porous structure, and due to the existence of pores, the PDMS composite film can capture more charges in the working process. In addition, the MWCNT creates a MWCNT three-dimensional conductive network in the polymer matrix, so that the conductivity of the PDMS composite film is increased, and the output performance of the nano generator is effectively improved.
2. The invention takes the aluminum foil and the electrode layer attached with the PDMS composite film as the friction electrode to manufacture the nano generator, and the existence of the ferroelectric materials BTO and ZNO in the PDMS composite film realizes the coupling of the friction nano generator and the piezoelectric nano generator in a single structure. And the coupling mode avoids layer-by-layer stacking, so that the M-type hybrid nano generator monomer has good stability and reliability.
3. The nano generator is light, convenient and fast, has good biocompatibility and is convenient for daily wearing by a human body. Meanwhile, the nano generator disclosed by the invention has wide application, and can be used as a power supply of wearable electronic equipment, a pressure sensor, a strain sensor and the like.
4. The process flow for preparing the PDMS-attached composite film aluminum foil is simple, the cost is low, and the large-scale industrial production is convenient to realize.
Drawings
FIG. 1 is an electron microscope scanning image of a PDMS film in an aluminum foil with a PDMS film obtained in comparative example 1.
Fig. 2 is a schematic structural diagram of the nano-generator in example 2, in which 1 represents a folded substrate, 2 represents an aluminum foil to which a PDMS composite film is attached, 3 represents a motor layer, and 4 regions are repeating units.
Fig. 3 is a graph showing the output voltage detection of the M-type hybrid nano-generator obtained in example 2.
Fig. 4 is an output voltage detection diagram of the M-type hybrid nano-generator obtained in comparative example 5.
Fig. 5 is a detection graph of the output voltage of the M-type hybrid nano-generator obtained in comparative example 6.
Fig. 6 is an output voltage detection diagram of the M-type hybrid nanogenerator obtained in comparative example 7.
Detailed Description
The first specific implementation way is as follows: the embodiment is a preparation method of a PDMS composite film aluminum foil, which is specifically completed by the following steps:
1. preparing a PDMS solution: mixing a main agent and a cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10; the cross-linking agent is Sylgard184B manufactured by Dow Corning, USA;
2. doping: adding barium titanate particles, zinc oxide particles and multi-walled carbon nanotube powder into a PDMS solution, and then magnetically stirring to obtain a mixed solution;
3. film preparation: uniformly coating a layer of mixed liquid on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a mixed liquid film, placing the aluminum foil attached with the mixed liquid film on an etching container in a mode that one side of the mixed liquid film of the aluminum foil attached with the mixed liquid film is in contact with the surface of an etching groove of the etching container, performing vacuum degassing treatment, and drying to obtain the PDMS (polydimethylsiloxane) composite film aluminum foil.
The second embodiment is as follows: the difference between the present embodiment and the first embodiment is: in the third step, the mass fraction of barium titanate in the PDMS composite film attached with the PDMS composite film aluminum foil is 0.25-0.5%, the mass fraction of zinc oxide is 0.3-0.5%, and the mass fraction of the multi-walled carbon nano-tube is 0.01-0.03%. The rest is the same as the first embodiment.
The third concrete implementation mode: the difference between this embodiment and the first or second embodiment is: in the third step, the mass fraction of barium titanate in the PDMS composite film attached with the PDMS composite film aluminum foil is 0.3-0.4%, the mass fraction of zinc oxide is 0.3-0.4%, and the mass fraction of the multi-wall carbon nano tube is 0.01-0.02%. The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is as follows: the specific operating parameters of the magnetic stirring in the first step are as follows: the magnetic stirring speed is 500 r/min-1500 r/min, and the magnetic stirring time is 30 min-60 min. The others are the same as in the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and the first to the fourth embodiments is: the specific operating parameters of the magnetic stirring in the second step are as follows: the magnetic stirring speed is 500 r/min-1500 r/min, and the magnetic stirring time is 30 min-60 min. The rest is the same as the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is as follows: the working parameters of the glue spreader in the third step are as follows: the spin coating speed of the coater is 300 r/min-400 r/min, and the spin coating time is 40 s-60 s. The rest is the same as the first to fifth embodiments.
The seventh embodiment: the difference between this embodiment and the first to sixth embodiments is: the thickness of the mixed liquid film in the aluminum foil attached with the mixed liquid film in the third step is 0.1 mm-0.5 mm. The rest is the same as the first to sixth embodiments.
The specific implementation mode is eight: the difference between this embodiment and one of the first to seventh embodiments is: and the groove depth of the etching groove of the etching container in the third step is 0.2 mm-0.5 mm. The rest is the same as the first to seventh embodiments.
The specific implementation method nine: the difference between this embodiment and the first to eighth embodiments is: and step three, the depth of the etching groove of the etching container is 0.2 mm-0.3 mm. The others are the same as in the first to eighth embodiments.
The detailed implementation mode is ten: the difference between this embodiment and one of the first to ninth embodiments is as follows: the vacuum degassing treatment in the third step is specifically performed as follows: degassing in a vacuum drying oven for 15-30 min. The rest is the same as the first to ninth embodiments.
The concrete implementation mode eleven: the present embodiment differs from the first to tenth embodiments in that: the drying operation in the third step is as follows: drying the mixture in a drying oven at the temperature of between 80 and 90 ℃ for 60 to 90min. The rest is the same as the first to tenth embodiments.
The specific implementation mode twelve: the embodiment is an application of a PDMS composite film aluminum foil, and the PDMS composite film aluminum foil and an electrode layer are used as friction electrodes to manufacture a nano generator, wherein the electrode layer is an aluminum foil, a copper foil, a gold foil, an indium tin oxide film or a titanium dioxide film.
According to the embodiment, mechanical energy is converted into electric energy in the process of contact-separation of the PDMS composite film and the electrode layer in the nano generator according to the fact that the PDMS composite film attached to the PDMS composite film aluminum foil and the electrode layer have different friction electrode sequence differences, namely different attraction degrees to electric charges.
The specific implementation mode thirteen: the present embodiment differs from the second embodiment in that: the nano generator is an M-type mixed nano generator, and the specific preparation process comprises the following steps:
the method comprises the steps of folding a substrate in an M shape to obtain an M-shaped substrate consisting of a plurality of folding substrates, sequentially attaching PDMS composite film aluminum foils and electrode layers to the surfaces of the plurality of folding substrates of the M-shaped substrate in a face-to-face mode of the PDMS composite films and the electrode layers, connecting the PDMS composite film aluminum foils attached to the M-shaped hybrid nano-generator in parallel by using leads as anodes, and connecting the electrode layers in parallel by using leads as cathodes.
The rest of the description is the same as the description of the twelfth embodiment.
The specific implementation mode is fourteen: the present embodiment is different from the thirteenth embodiment in that: the outer surfaces of two outermost folding substrates of an M-type substrate of the M-type hybrid nano-generator are not attached with a PDMS composite film aluminum foil and an electrode layer, the two folding substrates of a V-shaped structure formed by the two side surfaces of the M-type hybrid nano-generator respectively attached with the PDMS composite film aluminum foil and the electrode layer are used as repeating units, the number of the repeating units is N, and N is a positive integer. The rest is the same as in embodiment thirteen.
In the embodiment, two folding substrates which are respectively attached with PDMS composite film aluminum foils on two side surfaces and form a V-shaped structure with electrode layers are used as repeating units, the number of the repeating units is N, N is a positive integer, and the M-type mixed nano generator can collect mechanical energy in the human motion process based on a contact-separation mode. The superposition of the repeating units is realized, the surface area of the M-shaped structure is utilized to the maximum extent, and the conformal copying is convenient to directly carry out, so that the repeating units are expanded, and the performance is further enhanced.
Fifteenth, a detailed implementation: the present embodiment differs from one of the twelfth to fourteenth embodiments in that: the substrate is a polytetrafluoroethylene plate, an acrylic plate, a polyester resin plate or a polypropylene plate, and the thickness of the substrate is 0.5 mm-1 mm. The others are the same as the twelfth to fourteenth embodiments.
The specific implementation mode is sixteen: the present embodiment is different from the twelfth to fifteenth embodiment in that: the thickness of the electrode layer is less than 50 μm. The rest is the same as the embodiments twelve to fifteen.
Seventeenth embodiment: the present embodiment differs from one of the thirteenth to sixteenth embodiments in that: the included angle of two adjacent folding substrates in the M-type hybrid nano-generator is 20-30 degrees. The others are the same as the embodiments thirteen to sixteen.
The invention is not limited to the above embodiments, and one or a combination of several embodiments may also achieve the object of the invention.
The following tests are adopted to verify the effect of the invention:
example 1: a preparation method of an aluminum foil adhered with a PDMS composite film is specifically completed according to the following steps:
1. preparing a PDMS solution: mixing 6mL of a main agent with 600 mu L of a cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10, and the main agent is Sylgard184A produced by Dow Corning company of America; the cross-linking agent is Sylgard184B manufactured by Dow Corning, USA;
2. doping: adding 24mg of barium titanate particles, 24mg of zinc oxide particles and 1.4mg of multi-walled carbon nanotube powder into the PDMS solution obtained in the first step, and then magnetically stirring to obtain a mixed solution;
3. film preparation: uniformly coating a layer of mixed liquid on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a mixed liquid film, placing the aluminum foil attached with the mixed liquid film on an etching container in a manner that one side of the mixed liquid film of the aluminum foil attached with the mixed liquid film is in contact with the surface of the etching groove of the etching container, performing vacuum degassing treatment, and drying to obtain a PDMS-attached composite film aluminum foil, wherein the size of the aluminum foil is 50mm multiplied by 60mm, the size of the PDMS-attached composite film aluminum foil attached to the surface of the PDMS-attached composite film aluminum foil is 50mm multiplied by 50mm, and the aluminum foil in the PDMS-attached composite film aluminum foil is left with 10mm in the length direction and serves as a tab.
The specific operating parameters of the magnetic stirring in step one of example 1 are as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
The specific operating parameters of the magnetic stirring in step two of example 1 are as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
The working parameters of the glue spreader in step three of example 1 are as follows: the spin coating speed of the coater is 300r/min, and the spin coating time is 45s.
The thickness of the mixed solution film in the aluminum foil to which the mixed solution film was attached in the third step of example 1 was 0.1mm.
The etched grooves of the etching vessel described in step three of example 1 had a groove depth of 0.2mm.
The vacuum degassing treatment in step three of example 1 was carried out as follows: degassing in vacuum drying oven for 15min.
The drying operation in step three of example 1 is as follows: drying in oven at 80 deg.C for 60min.
Comparative example 1: comparison without doping:
1. preparing a PDMS solution: mixing 6mL of a main agent with 600 mu L of a cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10; the cross-linking agent is Sylgard184B produced by Dow Corning company;
2. film preparation: uniformly coating a layer of PDMS solution on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a PDMS solution layer, placing the aluminum foil attached with the PDMS solution layer on an etching container in a mode that one side of the PDMS solution layer of the aluminum foil attached with the PDMS solution layer is in contact with the etching groove surface of the etching container, performing vacuum degassing treatment, and drying to obtain a PDMS film aluminum foil, wherein the size of the aluminum foil is 50mm multiplied by 60mm, the size of the PDMS film attached to the surface of the PDMS film aluminum foil is 50mm multiplied by 50mm, and the length direction of the aluminum foil in the PDMS film aluminum foil is left 10mm as a tab.
Comparative example 1 specific operating parameters for the magnetic stirring in step one were as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
Comparative example 1 the operating parameters of the glue spreader in step two were: the spin coating speed of the coater is 300r/min, and the spin coating time is 45s.
Comparative example 1 the thickness of the PDMS solution layer in the aluminum foil to which the PDMS solution layer was attached in step two was 0.1mm.
Comparative example 1 the etched grooves of the etching vessel described in step two had a groove depth of 0.2mm.
The vacuum degassing treatment in step two of comparative example 1 was specifically performed as follows: degassing in vacuum drying oven for 15min.
The drying operation in step two of comparative example 1 is as follows: drying in an oven at 80 deg.C for 60min.
FIG. 1 is an electron microscope scanning image of a PDMS film in an aluminum foil with a PDMS film obtained in comparative example 1. As can be seen from fig. 1, in the case of the doped barium titanate particles, zinc oxide particles and multi-walled carbon nanotube powder, the obtained PDMS thin film is dense; and the barium titanate particles, the zinc oxide particles and the multi-wall carbon nanotube powder are doped in the PDMS composite film attached to the surface of the PDMS composite film aluminum foil obtained in the embodiment 1, so that the compact PDMS film is converted into the PDMS composite film with a porous structure.
Comparative example 2: comparison without addition of multi-walled carbon nanotube powder:
1. preparing a PDMS solution: mixing 6mL of the main agent with 600 mu L of the cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10, and the main agent is Sylgard184A produced by Dow Corning company of America; the cross-linking agent is Sylgard184B produced by Dow Corning company;
2. doping: adding 24mg of barium titanate particles and 24mg of zinc oxide particles into the PDMS solution obtained in the first step, and then magnetically stirring to obtain a mixed solution;
3. film preparation: uniformly coating a layer of mixed liquid on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a mixed liquid film, placing the aluminum foil attached with the mixed liquid film on an etching container in a manner that one side of the mixed liquid film of the aluminum foil attached with the mixed liquid film is in contact with the surface of the etching groove of the etching container, performing vacuum degassing treatment, and drying to obtain a PDMS-attached composite film aluminum foil, wherein the size of the aluminum foil is 50mm multiplied by 60mm, the size of the PDMS-attached composite film aluminum foil attached to the surface of the PDMS-attached composite film aluminum foil is 50mm multiplied by 50mm, and the aluminum foil in the PDMS-attached composite film aluminum foil is left with 10mm in the length direction and serves as a tab.
The specific operating parameters of the magnetic stirring in step one of comparative example 2 were as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
The specific operating parameters of the magnetic stirring in step two of comparative example 2 were as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
Comparative example 2 the operating parameters of the glue spreader in step three were: the spin coating speed of the coater is 300r/min, and the spin coating time is 45s.
Comparative example 2 the thickness of the mixed liquid film in the aluminum foil to which the mixed liquid film was attached in the third step was 0.1mm.
Comparative example 2 the etched grooves of the etching vessel described in step three had a groove depth of 0.2mm.
The vacuum degassing treatment in step three of comparative example 2 was specifically performed as follows: degassing in vacuum drying oven for 15min.
The drying operation in step three of comparative example 2 is as follows: drying in oven at 80 deg.C for 60min.
Comparative example 3: comparison with addition of barium titanate particles only:
1. preparing a PDMS solution: mixing 6mL of the main agent with 600 mu L of the cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10; the cross-linking agent is Sylgard184B manufactured by Dow Corning, USA;
2. doping: adding 24mg of barium titanate particles into the PDMS solution obtained in the first step, and then magnetically stirring to obtain a mixed solution;
3. film preparation: uniformly coating a layer of mixed liquid on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a mixed liquid film, placing the aluminum foil attached with the mixed liquid film on an etching container in a manner that one side of the mixed liquid film of the aluminum foil attached with the mixed liquid film is in contact with the surface of the etching groove of the etching container, performing vacuum degassing treatment, and drying to obtain a PDMS-attached composite film aluminum foil, wherein the size of the aluminum foil is 50mm multiplied by 60mm, the size of the PDMS-attached composite film aluminum foil attached to the surface of the PDMS-attached composite film aluminum foil is 50mm multiplied by 50mm, and the aluminum foil in the PDMS-attached composite film aluminum foil is left with 10mm in the length direction and serves as a tab.
The specific operating parameters of the magnetic stirring in step one of comparative example 3 were as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
The specific operating parameters of the magnetic stirring in step two of comparative example 3 are as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
Comparative example 3 the operating parameters of the glue spreader in step three were: the spin coating speed of the coater is 300r/min, and the spin coating time is 45s.
Comparative example 3 the thickness of the mixed liquid film in the aluminum foil to which the mixed liquid film was attached in the third step was 0.1mm.
Comparative example 3 the etched grooves of the etching vessel described in step three had a groove depth of 0.2mm.
The vacuum degassing treatment in step three of comparative example 3 was specifically performed as follows: degassing in vacuum drying oven for 15min.
The drying operation in step three of comparative example 3 is as follows: drying in oven at 80 deg.C for 60min.
Comparative example 4: comparison with addition of zinc oxide particles alone:
1. preparing a PDMS solution: mixing 6mL of the main agent with 600 mu L of the cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10, and the main agent is Sylgard184A produced by Dow Corning company of America; the cross-linking agent is Sylgard184B manufactured by Dow Corning, USA;
2. doping: adding 24mg of zinc oxide particles into the PDMS solution obtained in the first step, and then magnetically stirring to obtain a mixed solution;
3. film preparation: uniformly coating a layer of mixed solution on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a mixed solution film, placing the aluminum foil attached with the mixed solution film on an etching container in a manner that one side of the mixed solution film of the aluminum foil attached with the mixed solution film is in contact with the surface of the etching groove of the etching container, performing vacuum degassing treatment, and drying to obtain a PDMS-attached composite film aluminum foil, wherein the size of the aluminum foil is 50mm multiplied by 60mm, the size of the PDMS-attached composite film aluminum foil attached to the surface of the PDMS-attached composite film aluminum foil is 50mm multiplied by 50mm, and the aluminum foil in the PDMS-attached composite film aluminum foil is left for 10mm in the length direction and serves as a tab.
Comparative example 4 the magnetic stirring in step one has the following specific operating parameters: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
The specific operating parameters of the magnetic stirring in step two of comparative example 4 are as follows: the magnetic stirring speed is 1000r/min, and the magnetic stirring time is 30min.
Comparative example 4 the operating parameters of the glue spreader in step three were: the spin coating speed of the coater is 300r/min, and the spin coating time is 45s.
Comparative example 4 the thickness of the mixed liquid film in the aluminum foil to which the mixed liquid film was attached in the third step was 0.1mm.
Comparative example 4 the etched grooves of the etching vessel described in step three had a groove depth of 0.2mm.
Comparative example 4 the vacuum degassing treatment in step three was specifically performed as follows: degassing in vacuum drying oven for 15min.
The drying operation in step three of comparative example 4 is as follows: drying in oven at 80 deg.C for 60min.
Example 2: the application of the PDMS composite film aluminum foil is characterized in that the PDMS composite film aluminum foil and an electrode layer are used as a friction electrode to manufacture a nano generator, the electrode layer is an aluminum foil, and the thickness of the aluminum foil is 20 micrometers. The PDMS composite film-attached aluminum foil was prepared from example 1.
The nano-generator in embodiment 2 is an M-type hybrid nano-generator, and the specific preparation process is as follows:
the method comprises the steps of folding a substrate in an M shape to obtain an M-shaped substrate consisting of a plurality of folding substrates, wherein the size of each folding substrate is 70mm multiplied by 70mm, sequentially attaching PDMS composite film aluminum foils and electrode layers on the surfaces of the plurality of folding substrates of the M-shaped substrate in a face-to-face mode of the PDMS composite films attached with the PDMS composite film aluminum foils and the electrode layers, connecting the PDMS composite film aluminum foils attached with the PDMS in the M-shaped mixed nano generator in parallel through leads for lugs to serve as a positive electrode, and connecting the electrode layers in parallel through leads for serving as a negative electrode.
In the M-type hybrid nano-generator described in example 2, two folding substrates, each having a V-shaped structure formed by a PDMS composite film aluminum foil and an electrode layer respectively attached to both side surfaces thereof, are used as repeating units, and the number of the repeating units is 5.
Example 2 the substrate was a teflon plate, the thickness of the substrate was 0.5mm.
The included angle of two adjacent folding substrates in the M-type hybrid nano-generator is 30 degrees.
Comparative example 5: the present example is different from example 2 in that: the PDMS composite film-attached aluminum foil was prepared by comparative example 2. The rest is the same as in example 2.
Comparative example 6: the present example is different from example 2 in that: the PDMS composite film-attached aluminum foil was prepared according to comparative example 3. The rest is the same as in example 2.
Comparative example 7: the present example is different from example 2 in that: the PDMS composite film-attached aluminum foil was prepared by comparative example 4. The rest is the same as in example 2.
The open-circuit voltage of the M-type hybrid nano-generator in example 2 and comparative examples 5 to 7 was measured by the following specific procedure: the M-type hybrid nano-generator was periodically impacted with a force of 7kgf using an electric pusher, and data was collected and recorded using an oscilloscope, and the results are shown in fig. 3 to 6 and table 1.
TABLE 1
| Group of | Open circuit voltage/V |
| Example 2 | 5.2 |
| Comparative example 5 | 2.7 |
| Comparative example 6 | 1.7 |
| Comparative example 7 | 3.8 |
As can be seen from comparison between example 2 and comparative examples 5 to 7, under the same external conditions, the open circuit voltage of the M-type hybrid nano-generator prepared by the present invention is higher, and is significantly better than that of the M-type hybrid nano-generator doped with only zinc oxide particles (comparative example 6) and barium titanate particles (comparative example 7), so that the manner of doping Barium Titanate (BTO) particles, zinc oxide (ZNO) particles, and multi-walled carbon nanotube (MWCNT) powder converts a dense PDMS thin film into a porous-structured PDMS composite thin film, and due to the existence of pores, the PDMS composite thin film can capture more charges during operation, and the open circuit voltage of the M-type hybrid nano-generator prepared without doping multi-walled carbon nanotube powder (comparative example 5) is also significantly lower, which proves that MWCNT creates an nt wcthree-dimensional conductive network in a polymer matrix, increases the conductivity of the PDMS composite thin film, and effectively improves the output performance of the nano-generator.
Claims (8)
1. A preparation method of an aluminum foil adhered with a PDMS composite film is characterized in that: the method is specifically completed according to the following steps:
1. preparing a PDMS solution: mixing a main agent and a cross-linking agent, and then magnetically stirring to obtain a PDMS solution; the volume ratio of the main agent to the cross-linking agent is 10, and the main agent is Sylgard184A produced by Dow Corning company of America; the cross-linking agent is Sylgard184B manufactured by Dow Corning, USA;
2. doping: adding barium titanate particles, zinc oxide particles and multi-walled carbon nanotube powder into a PDMS solution, and then magnetically stirring to obtain a mixed solution;
3. film preparation: uniformly coating a layer of mixed liquid on the surface of an aluminum foil by using a glue spreader to obtain an aluminum foil attached with a mixed liquid film, placing the aluminum foil attached with the mixed liquid film on an etching container in a mode that one side of the mixed liquid film of the aluminum foil attached with the mixed liquid film is in contact with the surface of an etching groove of the etching container, performing vacuum degassing treatment, and drying to obtain a PDMS (polydimethylsiloxane) composite film aluminum foil;
in the third step, the mass fraction of barium titanate in the PDMS composite film attached with the PDMS composite film aluminum foil is 0.25-0.5%, the mass fraction of zinc oxide is 0.3-0.5%, and the mass fraction of the multi-walled carbon nano-tube is 0.01-0.03%.
2. The method of claim 1, wherein the aluminum foil is attached to the PDMS composite film and comprises: the specific operating parameters of the magnetic stirring in the first step are as follows: the magnetic stirring speed is 500 r/min-1500 r/min, and the magnetic stirring time is 30 min-60 min.
3. The method of claim 2, wherein the method comprises the following steps: the specific operating parameters of the magnetic stirring in the second step are as follows: the magnetic stirring speed is 500 r/min-1500 r/min, and the magnetic stirring time is 30 min-60 min.
4. The method of claim 3, wherein the method comprises the following steps: the working parameters of the glue spreader in the third step are as follows: the spin coating speed of the coater is 300 r/min-400 r/min, and the spin coating time is 40 s-60; the thickness of the mixed liquid film in the aluminum foil attached with the mixed liquid film in the third step is 0.1 mm-0.5 mm; the groove depth of the etching groove of the etching container in the third step is 0.2 mm-0.5 mm; the vacuum degassing treatment in the third step is specifically performed as follows: degassing in a vacuum drying oven for 15-30 min; the drying operation in the third step is as follows: drying in a drying oven at 80-90 deg.c for 60-90 min.
5. The use of a PDMS composite film aluminum foil according to any one of claims 1 to 4, wherein: preparing a nano generator by taking an aluminum foil adhered with a PDMS composite film and an electrode layer as friction electrodes, wherein the electrode layer is an aluminum foil, a copper foil, a gold foil, an indium tin oxide film or a titanium dioxide film;
the nano generator is an M-type mixed nano generator, and the specific preparation process comprises the following steps:
the method comprises the steps of folding a substrate in an M shape to obtain an M-shaped substrate consisting of a plurality of folding substrates, sequentially attaching PDMS composite film aluminum foils and electrode layers to the surfaces of the plurality of folding substrates of the M-shaped substrate in a face-to-face mode of the PDMS composite films and the electrode layers, connecting the PDMS composite film aluminum foils attached to the M-shaped mixed nano generator in parallel by using leads as anodes, and connecting the electrode layers in parallel by using leads as cathodes.
6. The use of the aluminum foil adhered to the PDMS composite film of claim 5, wherein: the outer surfaces of two outermost folding substrates of the M-type substrate of the M-type hybrid nano-generator are not attached with PDMS composite film aluminum foils and electrode layers, the two folding substrates of the M-type hybrid nano-generator, of which two side surfaces are respectively attached with PDMS composite film aluminum foils and electrode layers to form a V-shaped structure, serve as repeating units, the number of the repeating units is N, and N is a positive integer.
7. The use of the aluminum foil adhered to the PDMS composite film of claim 6, wherein: the substrate is a polytetrafluoroethylene plate, an acrylic plate, a polyester resin plate or a polypropylene plate, and the thickness of the substrate is 0.5 mm-1 mm; the thickness of the electrode layer is less than 50 μm.
8. The use of the aluminum foil attached to the PDMS composite film of claim 7, wherein: the included angle of two adjacent folding substrates in the M-type hybrid nano-generator is 20-30 degrees.
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