CN110183704A - A kind of electrothermal drive film and the frequency switching based on the film - Google Patents
A kind of electrothermal drive film and the frequency switching based on the film Download PDFInfo
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- CN110183704A CN110183704A CN201910306232.2A CN201910306232A CN110183704A CN 110183704 A CN110183704 A CN 110183704A CN 201910306232 A CN201910306232 A CN 201910306232A CN 110183704 A CN110183704 A CN 110183704A
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- electrothermal drive
- electrothermal
- sacnt
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
- C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
Abstract
The electrothermal drive film for quick deformation that the present invention provides a kind of under different voltages frequency, the film is to be compounded in pet film two sides respectively with superparamagnetic carbon nanotube (SACNT) film and ink to be prepared, since the thermal expansion coefficient between film seriously mismatches, when applying voltage to it, it is braked using the good electric conductivity of SACNT and the thermal conductivity of ink driving film bends, the film can complete driving under different frequency voltage, and performance is stablized, drive secondary performances up to ten thousand almost without decaying repeatedly, its performance is better than the most electric heating drivers reported at present.
Description
Technical field
The invention belongs to intelligent drives Material Fields, and in particular to a kind of electrothermal drive film and the frequency based on the film
Switch.
Background technique
Electrothermal drive is to increase material temperature based on expansion principle by applying voltage generation heat, realized and driven
It is dynamic.It has the advantages that driving voltage is low, driving force is big, is based on this principle, and researcher devises the drive of double-layer membrane electric heating formula
Dynamic device, U-shaped electrothermal driver, V-type electrothermal driver etc., as Tsinghua University Yang Yue et al. is ground using bimetallic driving method
Thermal actuation micropump has been made, its working principle is that so that the volume of pump chamber is changed by the flexible deformation of driving film, thus
Lead to the pressure change in pump chamber, realizes the cyclically-varying that fluid is entered pump chamber by inlet valve and reserved by outlet valve, but should
The general work frequency of driving method is lower.The V-type beam hot driver and Jin of such as D.Girbau and A.Laizaro design
Qiu etc. using polysilicon as drive material development a kind of predeformation U-shaped beam bistable state hot driver, there are power consumption compared with
Greatly, the problem that stability is poor, service life is short.
Carbon nanotube (CNT) has significant electricity, calorifics and mechanical performance, in conjunction with its unique negative thermal expansion coefficient
(CTE), it can be used for constructing twin lamella actuator, show excellent driveability.As CNT/ polyurethane-CNT/ silicon rubber drives
Dynamic device shows 0.58 shift length ratio (D/L) under 7V voltage.Carbon nanotube (SACNT) film of super arrangement is with change
It learns and is extracted in the carbon nanotube thin film of vapour deposition process growth, compared with CNT, SACNT has more outstanding mechanically and electrically hot
Can, it is the effective material for constructing electric heating or photo-thermal driver.The present invention using the higher ink of heat absorption coefficients as expanding layer, then
In conjunction with the preferable SACNT of electric heating property, ink/PET/SACNT composite membrane (IPS) of preparation can be under different frequency voltage
Quick response, and performance is stablized, performance almost without decaying, open by the frequency based on the film preparation after secondary drivings repeatedly up to ten thousand
It closes, it can be by the photoelectric sensor of activation second circuit, for controlling high-tension circuit, to guarantee the safety of high-tension apparatus.
Summary of the invention
In order to solve the problems existing in the prior art, the electricity for quick deformation that the present invention provides a kind of under different voltages frequency
Thermal drivers film, the film be compounded in respectively with superparamagnetic carbon nanotube (SACNT) film and ink pet film two sides preparation and
At, since the thermal expansion coefficient between film seriously mismatches, when to its apply voltage when, utilize the good electric conductivity of SACNT
With the thermal conductivity driving film bends braking of ink, which can complete driving under different frequency voltage, and performance is stablized,
Drive secondary performances up to ten thousand almost without decaying repeatedly, performance is better than the most electric heating drivers reported at present.
In addition, the high driving frequency based on electrothermal drive film under electro photoluminescence, we have manufactured one herein and have been based on being somebody's turn to do
The electric-controlled switch of film.The switch can by apply or close voltage formed bending/be not bent actuating, activate second circuit
Photoelectric sensor controls second circuit under low pressure, to guarantee the safety of high-tension circuit.
The electrothermal drive film 1 includes three layers: pet film 11, ink layer 12 and SACNT film 13, as shown in Figure 1, its
In, PET film is used as passivation layer, primarily serves supporting role.Ink layer is by carbon black, and polyurethane is dissolved in ethyl acetate and acetone
In the mixed solvent be prepared, the CTE coefficient of Yin Qigao can be used as thermal expansion layer.It is attached to the flexibility of the PET film other side
SACNT film has good electric conductivity, and can improve the integrally stretching intensity of electric-heating thin film.It is surveyed under 10V direct current (DC) voltage
Current-voltage (I-V) characteristic of electrothermal drive film shows SACNT as shown in Fig. 2, the variation of its current-voltage is linear preferable
The good electric conductivity of film.As shown in figure 3, electrothermal drive film keeps high resistance stabilization at particular bend radius 5.0mm
Property, resistance variations are measured less than 0.1%, are the candidates of very promising electrical actuator.
Due to SACNT film (- 1.4ppmK-1) and ink/PET film (ink layer: 106ppmK-1, pet layer: 40ppmK-1) CTE mismatch, when applying voltage to the film, the driving film is to SACNT lateral bend.After voltage is removed, companion
As temperature is cooled to room temperature, driver returns to original state again, as shown in Figure 4.The actuating displacement of electrothermal drive film with
Time, temperature variation relation as shown in figure 5, after voltage is opened 1 second displacement reach 8.2 millimeters, meanwhile, along with temperature from
25 DEG C increase to 81.5 DEG C.When the voltage is removed, driver quickly recovers to reset condition.D/L is for assessing electrothermal drive
The actuating performance of device IPS, when applying 0.5Hz square wave voltage (0-10V), D/L 0.68.
The frequency switching based on electrothermal drive film, be electric-heating thin film is cut into it is U-shaped, be wrapped in certain diameter circle
Heat-shaping is at arc-shaped on stick.As shown in fig. 6, U-shaped, curved IPS actuator be mounted on the side of optoelectronic switch.The light
Electric switch is generally in closed state when not covered by object.That is, the light of the transmitter transmitting when optoelectronic switch
When being not reflected to receiver, circuit is in closed state.On the contrary, when the light of transmitting is reflected by the object receiver, circuit
It disconnects.Electrothermal drive film is initially at bending, and wherein ink layer is prepared in inside by heat setting process.Therefore, when
When voltage is closed, the optoelectronic switch based on electrothermal drive film is in an off state；Upon application of a voltage, electrothermal drive film is curved
Song arrives the side SACNT, and optoelectronic switch is in closed state to connect circuit.Therefore, use electrothermal drive film as modulation
Device can provide the new method for manufacturing the electric-controlled switch with high ON/OFF frequency, control for second circuit, such as high pressure
Circuit control.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and specific embodiments
Fig. 1 electrothermal drive membrane structure schematic diagram；
The volt-ampere curve figure of Fig. 2 electrothermal drive film；
Resistance variations figure of Fig. 3 electrothermal drive film under 5mm bending radius；
Fig. 4 electrothermal drive film drives schematic diagram；
The change curve of Fig. 5 electric-heating thin film actuating displacement and time, temperature；
Frequency switching operation principle schematic diagram of the Fig. 6 based on electric-heating thin film；
Electrothermal drive film bends activate variation diagram when Fig. 7 opens and closes voltage；
The electrothermal drive film drive displacement variation diagram of Fig. 8 different-thickness pet film；
Electrothermal drive film drive displacement variation diagram under Fig. 9 difference stimulating frequency；
Figure 10 electrothermal drive film drives up to ten thousand change in displacement figures under 5Hz square wave；
Electrothermal drive film drive displacement and temperature change relational graph under Figure 11 different capacity；
Frequency switching of the Figure 12 based on electrothermal drive film lights LED lamp in the case where applying voltage.
Specific embodiment
Embodiment one: electrothermal drive film
Ink is uniformly coated in the one side of PET film.Ink is by carbon black (3-5%), and polyurethane (30%) is dissolved in
The in the mixed solvent of ethyl acetate and acetone (20%/80%) is prepared.Ink film thickness is 1.2 μm.Pass through chemical gaseous phase
It is deposited on the SACNT film of grown above silicon, with a thickness of 249 μm, carbon nanotube diameter is about 10nm, and wall number is 9.With blade from
SACNT film pulls out carbon nano pipe array, takes 30 layers of other side for being laid on pet film, SACNT layers is formed, then with anhydrous second
Alcohol infiltrates SACNT film, makes its densification.
Above-mentioned electrothermal drive film is connected in circuit, when opening and closing 0.5Hz square-wave voltage (0-10V), camera
A series of snapshots of record depict the reversible actuating behavior of electrothermal drive film, as shown in fig. 7, can clearly be observed that electricity
The free end of thermal drivers film has the bending amplitude of very little, this may be to cause since the heat of free end is unevenly distributed
's.
Study different pet thickness drivers, still, when PET thickness increases to 5 μm, D/L be reduced to 0.51 (displacement:
6.1 millimeters), as shown in figure 8, this may be attributed to the transfer of the rapid heat between ink layer and SACNT film.
Electrothermal drive film provided by the invention is in the achievable driving of different stimulating frequencies, when the excitation frequency of square-wave voltage
Rate from 0.01 increase to 20Hz (0-10V) when, the drive displacement of electric-heating thin film is reduced to 0.7mm from 8.3, as shown in Figure 9.Test
The displacement vibration situation of electric-heating thin film, change in displacement≤10% show that its performance does not almost have under 10000 5Hz square-wave voltages
There is obvious decaying, as shown in Figure 10, which has high cyclical stability.
In addition, being investigated electrothermal drive film drive displacement situation under different capacity: with the increase of power, electric heating
More electric energy can be converted to thermal energy by driving film, cause displacement to increase to 9.4mm from 0, while increasing with temperature from 25
92.9 DEG C are added to, as shown in figure 11.Big displacement about 9.4mm, the D/L 0.79 that electrothermal drive film generates, this is to be remembered at present
Record is used for electric heating actuator best values, as shown in table 1, lists SACNT/PDMS, sponge rGO/ polyimides is acidified single wall
The driveability of carbon nanotube/low density polyethylene (LDPE) twin lamella actuator etc., and with electrothermal drive film provided by the invention into
Row compares.The curvature of electrothermal drive film provided by the invention is 3.1cm-1, better than electric heating actuator most of in list 1.
Table 1
Embodiment two: electronically controlled frequency switch
Take electrothermal drive film to be made U-shaped structure, external dimensions is 15mm × 5mm (long × wide), interior grooves having a size of
10mm × 1mm (long × wide), the ink layer side of the electrothermal drive film is wrapped on the bar of 10 mm dias and at 120 DEG C
Become curved film within lower thermal finalization 1 hour.It is infrared sharp that the film is mounted on the electric switch that diffuses in normally off
The side of optical sensor forms electronically controlled frequency switch, with control circuit.The frequency switching under electro photoluminescence to SACNT lateral bend,
It can connect circuit and light LED.It can restore to the original state again when closing voltage, disconnect circuit, in this way, LED light exists
It connects in 0.27 second and is closed in 0.14 second, as shown in figure 12, this bending/un-flexed frequency of actuation maximum is reachable
17.5Hz。
In addition, those skilled in the relevant arts technical solution can also do other variations according to the present invention, skill according to the present invention
The variation that art scheme is done, within the scope of should all being protected included in the technical program.
Based on the above description of the preferred embodiments of the present invention, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the present invention entirely.The technical scope of this invention not office
The content being limited on specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (7)
1. a kind of electrothermal drive film, including ink layer, pet film and super in-line arrangement carbon nanotube, which is characterized in that the ink layer
The two sides of pet film are located at super in-line arrangement carbon nanotube.
2. electrothermal drive film according to claim 1, which is characterized in that the pet film thickness is 1-5 μm.
3. electrothermal drive film according to claim 1, which is characterized in that the ink film thickness is 1.2 μm.
4. electrothermal drive film according to claim 1, which is characterized in that the super in-line arrangement carbon nanotube number of plies is 30 layers.
5. -4 electrothermal drive film according to claim 1, which is characterized in that the film can be in stimulating frequency 0.01HZ-
Bending actuating is generated under 20HZ square wave voltage, and is restored to the original state after voltage removal.
6. electrothermal drive film according to claim 5, which is characterized in that when the bending actuating is 10000 times, actuating displacement
Variation≤10%.
7. the electronically controlled frequency based on electrothermal drive film as claimed in claim 6 switchs, which is characterized in that the electronically controlled frequency is opened
Pass is formed by electrothermal drive film preparation, and shape is U-shaped structure, and driving film is to ink layer side in circular arc bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910306232.2A CN110183704A (en) | 2019-04-11 | 2019-04-11 | A kind of electrothermal drive film and the frequency switching based on the film |
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| CN201910306232.2A CN110183704A (en) | 2019-04-11 | 2019-04-11 | A kind of electrothermal drive film and the frequency switching based on the film |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005007861A (en) * | 2003-05-27 | 2005-01-13 | Mitsubishi Gas Chem Co Inc | Three-layer structure oriented carbon nanotube membrane composite sheet and method for fixing the oriented carbon nanotube membrane |
| CN105003405A (en) * | 2012-08-01 | 2015-10-28 | 德克萨斯州大学系统董事会 | Coiled and non-coiled twisted nanofiber yarn and polymer fiber torsional and tensile actuators |
| CN105336846A (en) * | 2014-07-23 | 2016-02-17 | 清华大学 | Electrothermal-actuation composite material and electrothermal actuator |
| CN105355776A (en) * | 2015-10-26 | 2016-02-24 | 福建师范大学 | Electro-mechanical material and preparation method thereof and actuator employing electro-mechanical material |
-
2019
- 2019-04-11 CN CN201910306232.2A patent/CN110183704A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005007861A (en) * | 2003-05-27 | 2005-01-13 | Mitsubishi Gas Chem Co Inc | Three-layer structure oriented carbon nanotube membrane composite sheet and method for fixing the oriented carbon nanotube membrane |
| CN105003405A (en) * | 2012-08-01 | 2015-10-28 | 德克萨斯州大学系统董事会 | Coiled and non-coiled twisted nanofiber yarn and polymer fiber torsional and tensile actuators |
| CN105336846A (en) * | 2014-07-23 | 2016-02-17 | 清华大学 | Electrothermal-actuation composite material and electrothermal actuator |
| CN105355776A (en) * | 2015-10-26 | 2016-02-24 | 福建师范大学 | Electro-mechanical material and preparation method thereof and actuator employing electro-mechanical material |
Non-Patent Citations (1)
| Title |
|---|
| JINGJING LI ET AL.: ""Multi-responsive and multi-motion bimorph actuator based on super-aligned carbon nanotube sheets"", 《CARBON》 * |
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