CN110190180A - Piezoelectricity touch control film and piezo-electric type touch-control display panel comprising it - Google Patents
Piezoelectricity touch control film and piezo-electric type touch-control display panel comprising it Download PDFInfo
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- CN110190180A CN110190180A CN201910490888.4A CN201910490888A CN110190180A CN 110190180 A CN110190180 A CN 110190180A CN 201910490888 A CN201910490888 A CN 201910490888A CN 110190180 A CN110190180 A CN 110190180A
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- touch control
- control film
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- vinylidene
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- 239000000463 material Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 claims abstract description 20
- 229920000642 polymer Polymers 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 9
- 239000002033 PVDF binder Substances 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000005253 cladding Methods 0.000 claims abstract description 5
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- 239000003960 organic solvent Substances 0.000 claims description 4
- 229910052702 rhenium Inorganic materials 0.000 claims description 4
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical group FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 claims description 3
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- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 230000005621 ferroelectricity Effects 0.000 claims description 2
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- 239000010931 gold Substances 0.000 claims description 2
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
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- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims 2
- 150000001336 alkenes Chemical class 0.000 claims 2
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- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 claims 1
- 150000005690 diesters Chemical class 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims 1
- 229920001897 terpolymer Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000010287 polarization Effects 0.000 abstract description 6
- 230000005684 electric field Effects 0.000 abstract description 4
- 238000000280 densification Methods 0.000 abstract 1
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- 238000010345 tape casting Methods 0.000 description 13
- 239000000243 solution Substances 0.000 description 11
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- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
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- 238000002425 crystallisation Methods 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
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- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
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- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- AJFDBNQQDYLMJN-UHFFFAOYSA-N n,n-diethylacetamide Chemical compound CCN(CC)C(C)=O AJFDBNQQDYLMJN-UHFFFAOYSA-N 0.000 description 1
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- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
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- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/01—Manufacture or treatment
- H10N30/08—Shaping or machining of piezoelectric or electrostrictive bodies
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/857—Macromolecular compositions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Position Input By Displaying (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The present invention relates to a kind of piezoelectricity touch control films, including the non-transparent flexible substrate, metal electrode and beta phase polyvinylidene fluoride base piezoelectric membrane set gradually, piezoelectricity touch control film is transparent, the light transmission rate of piezoelectricity touch control film is 80% or more, piezoelectric membrane is made using the piezoelectric material of solution processable by cladding process, and piezoelectric material includes the polymer based on vinylidene and the molecule ferroelectric with multiple polar axis.Preparation method includes the following steps: providing a substrate, substrate includes non-transparent flexible substrate and the metal electrode that is arranged on non-transparent flexible substrate；Solution containing piezoelectric material is coated to substrate, forms liquid film on substrate, is removed after solvent to get arriving piezoelectricity touch control film.The smooth densification of piezo-electric type touch control film of the invention, thickness is controllable, transparency is high, just has preferable piezoelectricity without electric field polarization, and method of the invention rapidly and efficiently, can be realized at room temperature, is suitble to large area production.
Description
Technical field
It is shown the present invention relates to field of display technology more particularly to a kind of piezoelectricity touch control film and comprising its piezo-electric type touch-control
Panel.
Background technique
With the development of mobile electronic device, application of the display panel with touch function in man-machine interface is increasingly
Extensively.Currently, capacitive, resistor-type and transducers of the optical type are the three big major techniques for preparing touch-control display panel.They are total to
It is that a reference electrical signal or optical signal is previously applied with feature, shows the process of touch panel in finger or Pointer contacts
In, the function of touch-control is realized by the variation of detection electric signal or optical signal.However, due to reference electrical signal to be previously applied or
Optical signal, therefore they are easy to be influenced by external environment variation.Such as the optical signalling of optical sensing is easy by environment
The influence of illumination, while can not also be applied to curved surface touch-control display panel.Capacitive and resistor-type touch-control display panel is then easy
It is influenced by ambient humidity.In addition, the reference electrical signal or optical signal that are previously applied also increase the consumption of electronic equipment
Electricity, so that the power consumption of the Portable movables smart machine such as Vehicular screen and mobile phone screen is big, battery life is short.
Therefore, if piezo electric module is added in display panel, power-electric flux conversion of piezo electric module not only be may be implemented
The power consumption of the Portable movable smart machine of self-powered pressure touch, solution Vehicular screen and mobile phone screen is big, battery is continuous
The problems such as ETS estimated time of sailing is short.Moreover, electric energy caused by piezo electric module can also charge for battery, further extend the continuation of the journey of battery
Ability.In addition, piezo-electric type touch-control display panel not will receive the influence of the factors such as environmental condition such as light and humidity.
Polymer based on vinylidene (PVDF) has good chemical corrosion resistance, oxidative resistance, agent of low hygroscopicity energy
Etc. outside chemical properties, also there are the physical properties such as ferroelectricity, piezoelectricity and pyroelectric, such polymer flexible toughness is good, can prepare big
Area thin film.Wherein, PVDF is likely to form at least four kinds of crystal forms, respectively α phase, β phase, γ phase and δ phase in crystallization.And β phase
The conformation of molecule is alltrans conformation in PVDF, and dipole is arranged in parallel perpendicular to molecule chain direction, therefore β phase PVDF has very well
Piezoelectric property.
Currently, the preparation method of PVDF base piezoelectric membrane mainly passes through melt extrusion, one-way or bi-directional mechanical stretching, electricity
The polarized mode in field prepares the vinylidene base film rich in β phase.The PVDF prepared using melt extrusion and mechanical stretching method
Film has been commercialized, and is listened by forming device after the surface evaporation metal electrode of pvdf membrane, and in sensor, brake, water
It is widely applied in the fields such as device.However, since the pvdf membrane for being coated with metal electrode does not have translucency, it can not be in touch-control
Display field application.Another method for preparing β phase PVDF material is that (such as: surface is modified for addition filler into PVDF matrix
Barium titanate, clay, hydrated ion salt, graphene, carbon nanotube etc.), utilize the interface phase interaction between PVDF matrix and filler
For inducing the formation of β phase PVDF.The major advantage of these methods is PVDF composite material solution processable, and method is simple.Separately
Outside, by the way that vinylidene to be copolymerized in proper proportions with other monomers, the also PVDF base copolymerization of available solution processable
Object.PVDF composite material or vinylidene fluoride copolymer object are prepared into after film using the tape casting and formed by evaporation metal electrode
Senser element.However, prepared flexible piezoelectric sensors part does not still have the transparency in aforementioned manners.Moreover, because
The piezoelectric property of PVDF composite material and vinylidene fluoride copolymer object will receive the strong influence of dipole orientation and filler orientation,
Therefore the piezoelectric film that PVDF composite material is formed still needs electric field polarization during preparation.2014, Finland Tampere
SampoTuukkanen of University of Technology et al. utilizes commercialized PVDF stretched film and printable
The inks such as carbon nanotube, graphene do electrode be prepared for it is a kind of can be transparent under water with the piezoelectricity touch control film that is used under sunlight
Degree reaches 69.6%, and is applied to touch-control display panel (Adv.Funct.Mater.2014,24,6340-6347.).But it should
Method is more complex, and the transparency of prepared piezoelectricity touch control film is still to be improved.
A kind of molecule ferroelectric and PVDF be blended is disclosed application No. is 2018108852169 Chinese patent to prepare
The method of β phase PVDF composite material.This kind of material has unique multiaxis characteristic, so that prepared pvdf membrane is not necessarily to electric field pole
Changing just has good piezoelectric property.But its use solution volatilize naturally crystallization method prepare film, open-circuit voltage has
Wait improve, and large area production efficiency is to be improved.
Therefore, a kind of novel touch control film and preparation method thereof containing piezoelectric membrane is needed at present, and this method can solve
Time-consuming in the existing method for preparing piezoelectric membrane, valuableness is unable to the shortcomings that large area Quick uniform preparation, and solves touch control film
Do not have the transparency or transparent low problem.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of piezoelectricity touch control film and including its piezo-electric type touching
Display panel is controlled, the present invention prepares a kind of novel touch control film using the piezoelectric material of solution processable, is piezo-electric type touch-control
Film, and it is smooth it is fine and close, thickness is controllable, transparency is high, just has preferable piezoelectricity without electric field polarization, method of the invention is fast
It is fast efficiently to realize at room temperature, it is suitble to large area production.
The first purpose of the invention is to provide a kind of piezoelectricity touch control films, including non-transparent flexible substrate, the gold set gradually
Belong to electrode and β phase vinylidene fluoride piezoelectric membrane, the piezoelectricity touch control film are transparent, the light of the piezoelectricity touch control film penetrates
Rate is 80% or more, and piezoelectric membrane is made using the piezoelectric material of solution processable by cladding process, and the piezoelectric material includes
Polymer based on vinylidene and the molecule ferroelectric with multiple polar axis.
Further, the polymer based on vinylidene and the molecule with multiple polar axis that piezoelectric membrane includes β phase
Ferroelectric, the polymer based on vinylidene of β phase account for the 70%-99% of piezoelectric membrane mass fraction.Above-mentioned piezoelectric material exists
It is prepared by cladding process to form piezoelectric membrane after, the polymer transition based on vinylidene be β phase.
Further, one or more of the polymer binary ternary based on vinylidene
Further, molecule ferroelectric general molecular formula is (C7H13NOH)+X1 -、(C6H13N2)+X2O4 -(C7H14N)+X2O4 -
Middle one or more；Wherein, X1=Cl, Br or I, X2=Cl, Br, I or Re.Since the ferroelectric crystal structure of molecule is with non-
Centre symmetry, therefore the surface of ferroelectric material can generate spontaneous polarization.Coupled between spontaneous polarization and stress imparts
The excellent piezoelectric property of molecule ferroelectric.
Preferably, molecule ferroelectric is Isosorbide-5-Nitrae-diazabicyclo [2.2.2] octane borofluoride (dabcoHBF4)、1,4-
Diazabicyclo [2.2.2] octane periodate (dabcoHIO4) and 1,4- diazabicyclo [2.2.2] octane perrhenate
(dabcoHReO4One or more of).It is highly preferred that molecule ferroelectric is the high rhenium of Isosorbide-5-Nitrae-diazabicyclo [2.2.2] octane
Hydrochlorate.Further, non-transparent flexible substrate is polyethylene terephthalate (PET), polytetrafluoroethylene (PTFE) (PTFE), polyimides
(PI), one or more of polycarbonate (PC), polyethylene naphthalate (PEN) etc..
Further, metal electrode is one or more of silver, tin indium oxide, gold, copper, aluminium etc..
Further, piezoelectricity touch control film with a thickness of 1 μm -150 μm.
A second object of the present invention is to provide a kind of preparation methods of above-mentioned piezoelectricity touch control film, comprising the following steps:
(1) substrate is provided, the substrate includes non-transparent flexible substrate and is arranged on the non-transparent flexible substrate
Metal electrode；
(2) solution containing piezoelectric material is coated to substrate, forms liquid film on substrate, after removing solvent, i.e.,
Obtain the piezoelectricity touch control film.
In the specific embodiment of the invention, in step (1), substrate is the PET transparent conductive film comprising nano-silver thread.
Further, in step (2), the solution containing piezoelectric material includes polymer, tool based on vinylidene
There are the molecule ferroelectric and organic solvent of multiple polar axis, the polymer based on vinylidene and the ferroelectric quality of molecule
It is described to be accounted for based on the polymer of vinylidene and the ferroelectric quality sum of molecule containing the molten of piezoelectric material than for 70:30-99:1
The 0.1%-50% of liquid mass fraction.
Further, in step (2), one or more of binary ternary
The polymer for being preferably based on vinylidene is being total to for Kynoar (PVDF), vinylidene and trifluoro-ethylene
Polymers (P (VDF-TrFE)).
Further, in step (2), molecule ferroelectric general molecular formula is (C7H13NOH)+X1 -、(C6H13N2)+X2O4 -With
(C7H14N)+X2O4 -Middle one or more；Wherein, X1=Cl, Br or I, X2=Cl, Br, I or Re.
Preferably, molecule ferroelectric is Isosorbide-5-Nitrae-diazabicyclo [2.2.2] octane perchlorate ((C6H13N2)+ClO4 -, or
Write dabcoHClO4), 1,4- diazabicyclo [2.2.2] octane periodate ((C6H13N2)+IO4 -, or writing
dabcoHIO4), 1,4- diazabicyclo [2.2.2] octane perrhenate ((C6H13N2)+ReO4 -, or writing dabcoHReO4)。
Further, in step (2), organic solvent is n,N-Dimethylformamide, n,N-dimethylacetamide, diformazan
Base sulfoxide, acetone, two butanone, cyclohexanone, N, N- diethyl acetamide, N-Methyl pyrrolidone, trimethyl phosphate, tricresyl phosphate second
One or more of ester.Preferably, organic solvent is n,N-Dimethylformamide and n,N-Dimethylformamide and acetone
Mixed solvent.
Further, in step (2), the coating method is knife coating, and blade coating speed is 1mm/s-100mm/s, is scraped
Knife is 1 μm -150 μm at a distance from substrate.Knife coating be rigidity or flexible substrates surface quickly and effectively, large area production film
One of most popular method, in terms of being used in thin film fabrication.The major advantage of knife coating in addition to it is simple and quick, at
This is low outer, moreover it is possible to which the waste for reducing polymer material in production process improves the utilization rate of material.
Further, in step (2), substrate is transferred in the baking oven for set temperature and is heated to remove solvent or straight
It connects and substrate is heated to remove solvent.Heating temperature is 20-90 DEG C, preferably 50-90 DEG C, more preferably 70-90 DEG C.
Using the above method, the size of prepared piezoelectric membrane is only limited by blade coating equipment and substrate dimension,
Thickness is accurately adjustable.
Third object of the present invention is to provide a kind of touch-control display panels, including above-mentioned piezoelectricity touch control film.
According to the above aspect of the present invention, the present invention has at least the following advantages:
Include and the piezo-electric type touch control film of β phase vinylidene fluoride piezoelectric membrane the present invention provides a kind of, with piezoelectricity
Property, beta phase polyvinylidene fluoride with higher in piezoelectric membrane, its transparency is suitble to up to 80% or more in visible-range
In the application of touch-control display field.
Piezoelectricity touch control film of the invention is prepared using simple cladding process, and this method is simple and quick, at low cost, improves material
The utilization rate of material, and can prepare under cryogenic.Prepared piezoelectric membrane β phase content with higher, without polarization
Just there is preferable piezoelectricity.The size of prepared piezoelectric membrane is only limited by blade coating equipment and substrate dimension, thick
Degree is accurate adjustable, can prepare large scale piezoelectric membrane.Utilize pressure touch film prepared by method provided by the present invention
Transparency is up to 80% or more.This technology of preparing being simple and efficient of the invention is in high-performance polyvinylidene fluoride composite film
It commercially produces and piezoelectricity touch screen manufacturing field shows very big application potential.
It may be directly applied to display panel using transparent piezoelectric type touch control film prepared by method provided by the present invention, realize
The self-powered of touch-control display panel, it is not necessary that electric signal or optical signal is previously applied, the capacity for solving battery is difficult to power for a long time
The problem of continuation of the journey.Generated voltage reaches 1V or more under the effect of the pressure, can charge after over commutation for battery.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
Fig. 1 is the transparency testing result to piezoelectricity touch control film in embodiment 1- embodiment 7.
Fig. 2 is the piezoelectricity test result of the piezoelectricity touch control film quickly prepared in embodiment 3 using knife coating.
Fig. 3 is the piezoelectricity test result of the piezoelectricity touch control film quickly prepared in embodiment 4 using knife coating.
Fig. 4 is the piezoelectricity test result of the piezoelectricity touch control film quickly prepared in embodiment 5 using knife coating.
Fig. 5 is the piezoelectricity test result of the piezoelectricity touch control film quickly prepared in embodiment 6 using knife coating.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
In following embodiment of the present invention, used substrate includes non-transparent flexible substrate and is arranged in the transparent flexible
Metal electrode in substrate, for the PET transparent conductive film comprising nano-silver thread of Gu Shi nanosecond science and technology Co., Ltd production.
Comparative example 1
As control, a kind of side that Kynoar (PVDF) film is quickly prepared using knife coating is present embodiments provided
Method.Specific step is as follows:
1) 0.6gPVDF powder is dissolved in 10mLN, dinethylformamide/acetone (DMF/Ac) in the mixed solvent, machine
Tool stirring guarantees sample dissolution completely, obtains PVDF solution.
2) setting base material temperature is 70 DEG C, and blade coating speed is 10mm/s, and the distance between scraper and substrate are 50 microns, will
Appropriate PVDF solution uniformly drips at scraper, starts to scratch.After blade coating, liquid film is evenly distributed on substrate, to molten
Liquid evaporation completely, obtains uniform large scale PVDF thin film.
Embodiment 1
The present embodiment is related to a kind of quickly prepared using knife coating with high-content beta phase polyvinylidene fluoride piezoelectricity touch control film
Method.
Piezoelectricity touch control film includes that the non-transparent flexible substrate set gradually, metal electrode and β phase vinylidene fluoride piezoelectricity are thin
Film, piezoelectric membrane include β phase PVDF and dabcoHReO4, β phase PVDF accounts for the 80% of piezoelectric membrane quality.
Specific step is as follows for the preparation method of piezoelectricity touch control film:
1) 0.552gPVDF powder is dissolved in 10mLN, dinethylformamide/acetone (DMF/Ac) in the mixed solvent,
Mechanical stirring adds 0.048gdabcoHReO4, continue to stir in a heated condition, obtain dabcoHReO4- PVDF mixing is molten
Liquid.
2) setting base material temperature is room temperature (25 DEG C), and setting blade coating speed is 10mm/s, the distance between scraper and substrate
It is 50 microns, appropriate mixed solution is uniformly dripped at scraper, starts to scratch.After blade coating, liquid film is uniformly distributed base
On material, completely to solution evaporation, obtains uniform large scale and be based on dabcoHReO4The piezoelectricity touch control film of-PVDF.
Embodiment 2
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 2), base material temperature is set as
40℃。
Embodiment 3
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 2), base material temperature is set as
50℃。
Embodiment 4
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 2), base material temperature is set as
60℃。
Embodiment 5
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 2), base material temperature is set as
70℃。
Embodiment 6
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 2), base material temperature is set as
80℃。
Embodiment 7
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 2), base material temperature is set as
90℃。
Embodiment 8
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 1), by dabcoHReO4
The dabcoHClO of quality such as replace with4, in step 2), base material temperature is set as 70 DEG C.
Embodiment 9
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 1), by dabcoHReO4
The dabcoHIO of quality such as replace with4, in step 2), base material temperature is set as 70 DEG C.
Embodiment 10
Piezoelectricity touch control film is prepared according to the method for embodiment 1, the difference is that: in step 1), PVDF is replaced with
Etc. quality P (VDF-TrFE), in step 2), base material temperature is set as 70 DEG C.
In above embodiments, the size of the prepared piezoelectricity touch control film only limit by blade coating equipment and substrate dimension
System, thickness is accurately adjustable.Blade coating speed can be adjusted within the scope of 1mm/s-100mm/s, scraper at a distance from substrate can 1 μm-
It is adjusted in 150 μ ms.In addition, coating method is not only limited to knife coating, it can also be spin-coating method, the tape casting, ink-jet printing
Deng.
Fig. 1 is the transparency testing result to piezoelectricity touch control film in embodiment 1- embodiment 7.In figure, the top curve is
The transparency test result of PET base material, in other curves, from bottom to top, respectively base material temperature is 25 DEG C, 40 DEG C, 50 DEG C, 60
DEG C, 70 DEG C, 80 DEG C, the transparency testing result of the piezoelectricity touch control film prepared under the conditions of 90 DEG C.The result shows that laminated film is saturating
Lightness is preferable, and in visible wavelength range, transmitance is all larger than 80%, but slightly below transparent substrates (being greater than 92%).
Fig. 2-5 is the piezoelectricity test knot of the piezoelectricity touch control film quickly prepared in embodiment 3,4,5,6 using knife coating respectively
Fruit.Control vibration excitor frequency is 8Hz, and the size of power is 2N, records voltage (V)-time (S) curve of Piezoelectric anisotropy film.By
As a result it is found that prepared Piezoelectric anisotropy film has preferable piezoelectricity, output voltage is about ± 1.1V.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of piezoelectricity touch control film, it is characterised in that: including the non-transparent flexible substrate, metal electrode and β skew set gradually
Fluoride-based piezoelectric membrane, the piezoelectricity touch control film are transparent, and the light transmission rate of the piezoelectricity touch control film is 80% or more, pressure
Conductive film is made using the piezoelectric material of solution processable by cladding process, and the piezoelectric material includes poly- based on vinylidene
Close object and the molecule ferroelectric with multiple polar axis.
2. piezoelectricity touch control film according to claim 1, it is characterised in that: piezoelectric membrane includes β phase based on vinylidene
Polymer and molecule ferroelectric with multiple polar axis, the polymer based on vinylidene of β phase account for piezoelectric membrane quality
The 70%-99% of score.
3. piezoelectricity touch control film according to claim 1, it is characterised in that: the polymer based on vinylidene is polyvinylidene fluoride
It alkene, the bipolymer being made of vinylidene with trifluoro-ethylene and is made of vinylidene, trifluoro-ethylene and chlorotrifluoroethylene
One or more of terpolymer.
4. piezoelectricity touch control film according to claim 1, it is characterised in that: molecule ferroelectric general molecular formula is (C7H13NOH)+
X1 -、(C6H13N2)+X2O4 -(C7H14N)+X2O4 -Middle one or more；Wherein, X1=Cl, Br or I, X2=Cl, Br, I or Re.
5. piezoelectricity touch control film according to claim 1, it is characterised in that: the non-transparent flexible substrate is poly terephthalic acid
One or more of second diester, polytetrafluoroethylene (PTFE), polyimides, polycarbonate and polyethylene naphthalate.
6. piezoelectricity touch control film according to claim 1, it is characterised in that: the metal electrode be silver, tin indium oxide, gold,
One or more of copper and aluminium.
7. a kind of preparation method of piezoelectricity touch control film of any of claims 1-6, which is characterized in that including following step
It is rapid:
(1) substrate is provided, the substrate includes non-transparent flexible substrate and the conduction that is arranged on the non-transparent flexible substrate
Electrode；
(2) solution containing piezoelectric material is coated to substrate, forms liquid film on substrate, removed after solvent to get arriving
The piezoelectricity touch control film.
8. preparation method according to claim 7, it is characterised in that: in step (2), the solution containing piezoelectric material
Including based on vinylidene polymer, with the molecule ferroelectric and organic solvent of multiple polar axis, it is described to be based on inclined fluorine second
The polymer and the ferroelectric mass ratio of molecule of alkene are 70:30-99:1, the polymer based on vinylidene and molecule ferroelectricity
The quality sum of body accounts for the 0.1%-50% of the liquid quality fraction containing piezoelectric material.
9. preparation method according to claim 7, it is characterised in that: in step (2), the coating method is blade coating
Method, blade coating speed are 1mm/s-100mm/s, and scraper is 1 μm -150 μm at a distance from substrate.
10. a kind of piezo-electric type touch-control display panel, it is characterised in that: touched including piezoelectricity of any of claims 1-6
Control film.
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