CN110183803A - A kind of transparent dielectric film and preparation method thereof - Google Patents
A kind of transparent dielectric film and preparation method thereof Download PDFInfo
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- CN110183803A CN110183803A CN201910507657.XA CN201910507657A CN110183803A CN 110183803 A CN110183803 A CN 110183803A CN 201910507657 A CN201910507657 A CN 201910507657A CN 110183803 A CN110183803 A CN 110183803A
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- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K5/17—Amines; Quaternary ammonium compounds
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Abstract
The present invention provides a kind of transparent dielectric film and preparation method thereof, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, the mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 10:0.1-3.The dielectric constant of transparent dielectric film of the invention in dielectric field significantly improves, and the transparency of polyvinyl alcohol still maintains, and can increase the use scope of material, in addition the preparation method of the transparent dielectric film is simple, power consumption of polymer processing is low, and required cost of material is relatively low, and cost is relatively low.
Description
Technical field
The present invention relates to dielectric material technical field, especially a kind of transparent dielectric film and preparation method thereof.
Background technique
With the lasting consumption of energy demand being continuously increased with fossil fuel, traditional energy utilization efficiency and expansion are improved
The problem of new energy usage range, is increasingly prominent.Energy-storage capacitor is high with energy storage density, charge/discharge speed is fast, anti-circulation is old
Change, the advantage stable suitable for the extreme environments such as high temperature and pressure and performance, meet the requirement of new period using energy source, electric power,
It is played an increasingly important role in electronic system.With the development of material science, energy-storage capacitor still has biggish development
Space.The key for improving its energy storage characteristic is research and development high energy storage density dielectric material.
Mainly there are ceramic-like dielectric material, such as barium titanate, strontium titanates at present, lead titanates and barium strontium titanate etc. possess very Gao Jie
The ferroelectric ceramic material of electric constant, dielectric constant high thermal stability is good, but processing and forming is difficult, it is difficult to hugeization and miniature
Change.Polymer material also has a wide range of applications in energy-storage capacitor because of its excellent processing performance, good voltage endurance capability.
It is wherein most mature with polypropylene (PP) application.Polyacrylic dielectric constant only has 2.2 or so, but its breakdown strength is up to 720MV/
M, and its membrane stress is fine, is suitable for takeup type thin film capacitor.However since dielectric constant is limited, so capacitance
And energy storage density can not increase substantially, and equally limit the use scope of polymerization species dielectric substance.Due to one-component
Material be difficult to meet the fast development of power electronics industry, so more attentions have been transferred to composite wood by researcher
In the research of material.Wish the advantage for obtaining material simultaneously in each component material, or even is mixed
The characteristic that miscellaneous preceding each component material does not have realizes the target of 1+1 >=2.Due to the good processing performance of polymer and with electricity
The favorable compatibility of sub-circuit integrated system, so that high dielectric complex class materials most tends to select using polymer as substrate.
It is compound by choosing different kind of material and polymer, so that satisfied dielectric properties and industrial processes can be obtained
It needs.Two relatively broad class doping systems are studied at present is respectively as follows: 1. ferroelectric ceramic grains/polymer composites；2. leading
Electric filler/polymer composites.But doping system can significantly reduce the processability of polymer, and the uniformity of system
Also it is relatively difficult to control, and the transparency of resulting dielectric product is transparent because the influence of composite material has significantly decline to lose
Property, this also will limit the application of material in some respects.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of transparent dielectric film and preparation method thereof, which is
Transparent high dielectric thin film, and its thickness can be adjusted by spin speed, solution concentration, solution total amount and film forming area
Whole, which can be used for dielectric, energy storage, ferroelectricity, piezoelectricity, suction wave, electromagnetic shielding etc..
In order to achieve the above object, the invention provides the following technical scheme:
A kind of transparent dielectric film, it is characterised in that: hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, institute
The mass ratio for stating polyvinyl alcohol and hydrogeneous ferroelectricity salt is 10:0.1-3.
Further, the hydrogeneous ferroelectricity salt is with water solubility or to dissolve in the hydrogeneous ferroelectricity salt of dimethyl sulfoxide.
Further, the hydrogeneous ferroelectricity salt is [HN (CH2CH2)3NH]ClO4, or [HN (CH2CH2)3NH]FO4。
A kind of preparation method of transparent dielectric film, includes the following steps:
(1) pva powder is added in the beaker for filling solvent, low temperature ultrasonic 0.5-5 hours, is then heated molten
Low temperature ultrasonic 0.5-5 hours again, it is spare to obtain uniform liquid to dissolving 0.5-12 hours at 80-100 DEG C for agent；
(2) according to the mass ratio of hydrogeneous ferroelectricity salt and polyvinyl alcohol, weigh hydrogeneous ferroelectricity salt, and be dissolved in deionized water or
It is 1-5 minutes ultrasonic in person's dimethyl sulfoxide, it is spare to obtain uniform transparency liquid；
(3) spare transparency liquid obtained in spare liquid obtained in step (1) and step (2) is mixed, is mixed
Ultrasound 1-5 minutes after conjunction, be uniformly dispersed to obtain mixed solution；
(4) mixed solution obtained in step (3) is formed a film, is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree arrives
0.01-0.09Mpa is placed 10-48 hours；Then 50 DEG C are warming up to, is vacuumized, vacuum degree to 0.01-0.09Mpa places 5-
12 hours to get the transparent dielectric film.
Specifically, by spin coating on the glass plate of mixed solution after the cleaning obtained in step (3) at uniform film or
The solution of certain volume is poured into the culture dish of certain diameter and is formed a film.
The invention has the following advantages:
(1) present invention is using different alcoholysis degrees and the polyvinyl alcohol of the degree of polymerization as raw material, with deionized water or dimethyl
Sulfoxide is solvent, is dissolved polyvinyl alcohol in solution, then is equipped with the deionized water or diformazan of the hydrogeneous ferroelectricity salt of various concentration
The solution of base sulfoxide after obtaining uniform liquid by ultrasonic treatment, is formed a film on clean glass plate or solution by spin-coating method
The mode of film forming.The dielectric constant of prepared transparent dielectric film significantly improves, and the transparency of polyvinyl alcohol still maintains,
The use scope of material can be increased, which can be used for dielectric, energy storage, ferroelectricity, piezoelectricity, suction wave, electromagnetic shielding etc..
(2) the transparent dielectric film prepared by the present invention, can be by adjusting spin speed, solution concentration, solution total amount
The thickness of film is adjusted with film forming area.
(3) in the preparation process of transparent dielectric film of the invention, deionized water can be used completely, organic solvent-free
Pollution.
(4) in the method for the transparent dielectric film prepared by the present invention, the additional amount of hydrogeneous ferroelectricity salt is relatively low, is only poly-
The 1%-30% of vinyl alcohol weight.And the preparation method of transparent dielectric film of the invention is simple, power consumption of polymer processing is low, required
Cost of material is relatively low, and cost is relatively low.
Detailed description of the invention
Fig. 1 is the different quality containing 5%, 10%, 15% and 20% that polyvinyl alcohol is added in the embodiment of the present invention 9
Hydrogeneous ferroelectricity salt [HN (CH2CH2)3NH]ClO4The dielectric film being prepared, respectively with the film that is not added with 1788 polyvinyl alcohol
Measurement Comparative result curve graph；
Fig. 2 is pure 1788 polyvinyl alcohol film and the mass fraction for being added to polyvinyl alcohol in the embodiment of the present invention 9
5% hydrogeneous ferroelectricity salt [HN (CH2CH2)3NH]ClO4The dielectric film being prepared, the transmitance comparison in visible-range
Curve graph.
Specific embodiment
Technical solution of the present invention is clearly and completely described below, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment 1
The transparent dielectric film of the present embodiment 1, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 5:1.
The transparent dielectric film the preparation method comprises the following steps: 1788 powder of polyvinyl alcohol for first weighing 6g is added to and fills 94g
In the beaker of ionized water, low temperature ultrasonic 0.5 hour, then to 100 degree, side agitating solution made it dissolve side heating deionized water,
10 hours a length of when this dissolution, low temperature ultrasonic 2 hours, it is spare to obtain uniform liquid again.The ferroelectricity small molecule of 1.2g is weighed again
Salt [HN (CH2CH2)3NH]ClO4, it is dissolved in 8.8g deionized water, ultrasound 5 minutes obtains homogeneous transparent liquid.It takes above two
Liquid, ultrasound 5 minutes after the ferroelectricity small molecule salt deionized water solution mixing of the polyvinyl alcohol deionized water solution and 1g of 10g,
It is made to be uniformly dispersed.It takes afterwards and carries out spin coating on the glass plate (long 7.6cm, wide 2.5cm) of 1g solution after the cleaning into uniform film.
It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.05Mpa is placed 24 hours.Then 50 DEG C are warming up to, is vacuumized,
Vacuum degree is placed 12 hours to 0.05Mpa.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 1 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 33356.9, is pure polyvinyl alcohol film obtained by method for making sample of the same race in same test condition
6270 times of lower gained dielectric real part；The film is 72.5% in the transmitance of wavelength 650nm at room temperature.
Embodiment 2
The transparent dielectric film of the present embodiment 2, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 5:1.
The transparent dielectric film the preparation method comprises the following steps: 1788 powder of polyvinyl alcohol for first weighing 5g is added to and fills 95g
In the beaker of ionized water, low temperature ultrasonic 0.5 hour, then to 100 degree, side agitating solution made it dissolve side heating deionized water,
10 hours a length of when this dissolution, low temperature ultrasonic 2 hours, it is spare to obtain uniform liquid again.The ferroelectricity small molecule salt of 1g is weighed again
[HN(CH2CH2)3NH]ClO4, it is dissolved in 9g deionized water, ultrasound 5 minutes, available homogeneous transparent liquid.It takes above two
Liquid, ultrasound 5 minutes after the ferroelectricity small molecule salt deionized water solution mixing of the polyvinyl alcohol deionized water solution and 1g of 10g,
It is made to be uniformly dispersed.It takes afterwards and carries out spin coating on the glass plate (long 7.6cm, wide 2.5cm) of 1g solution after the cleaning into uniform film.
It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.05Mpa is placed 24 hours.Then 50 DEG C are warming up to, is vacuumized,
Vacuum degree is placed 12 hours to 0.05Mpa.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 2 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 22140.8, is pure polyvinyl alcohol film obtained by method for making sample of the same race in same test condition
4257.8 times of lower gained dielectric real part；The film is 73.4% in the transmitance of wavelength 650nm at room temperature.
Embodiment 3
The transparent dielectric film of the present embodiment 3, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 10:1.
The transparent dielectric film the preparation method comprises the following steps: 1788 powder of polyvinyl alcohol for first weighing 6g is added to and fills 94g
In the beaker of ionized water, low temperature ultrasonic 0.5 hour, then to 100 degree, side agitating solution made it dissolve side heating deionized water,
10 hours a length of when this dissolution, low temperature ultrasonic 2 hours, it is spare to obtain uniform liquid again.The ferroelectricity small molecule of 1.2g is weighed again
Salt [HN (CH2CH2)3NH]ClO4, it is dissolved in 8.8g deionized water, ultrasound 5 minutes, available transparent and homogeneous liquid.It takes above-mentioned
Two kinds of liquid, ultrasound 5 after the ferroelectricity small molecule salt deionized water solution mixing of the polyvinyl alcohol deionized water solution and 0.5g of 10g
Minute, so that it is uniformly dispersed.It takes afterwards and carries out spin coating on the glass plate (long 7.6cm, wide 2.5cm) of 1g solution after the cleaning at uniform
Film.It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.05Mpa is placed 24 hours.Then 50 DEG C are warming up to, is taken out
Vacuum, vacuum degree to 0.05Mpa are placed 12 hours.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 3 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 1557.1, is pure polyvinyl alcohol film obtained by method for making sample of the same race in same test condition
303.5 times of lower gained dielectric real part；The film is 84.3% in the transmitance of wavelength 650nm at room temperature.
Embodiment 4
The transparent dielectric film of the present embodiment 4, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 10:1.
The transparent dielectric film the preparation method comprises the following steps: 1788 powder of polyvinyl alcohol for first weighing 6g is added to and fills 94g
In the beaker of ionized water, low temperature ultrasonic 1 hour, then side heating deionized water was to 80 degree, and side agitating solution makes it dissolve, this is molten
A length of 12 hours when solution, low temperature ultrasonic 3 hours, it is spare to obtain uniform liquid again.Ferroelectricity small molecule salt [the HN of 1.2g is weighed again
(CH2CH2)3NH]ClO4, it is dissolved in 8.8g deionized water, ultrasound 15 minutes, available transparent and homogeneous liquid.It takes above two
Liquid, 15 points of ultrasound after the ferroelectricity small molecule salt deionized water solution mixing of the polyvinyl alcohol deionized water solution and 0.5g of 10g
Clock makes it be uniformly dispersed.It takes afterwards and carries out spin coating on the glass plate (long 7.6cm, wide 2.5cm) of 1g solution after the cleaning at uniform
Film.It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.05Mpa is placed 24 hours.Then 50 DEG C are warming up to, is taken out true
Sky, vacuum degree to 0.05Mpa are placed 12 hours.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 4 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 1318.1, is pure polyvinyl alcohol film obtained by method for making sample of the same race in same test condition
253 times of lower gained dielectric real part；The film is 82.6% in the transmitance of wavelength 650nm at room temperature.
Embodiment 5
The transparent dielectric film of the present embodiment 5, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 10:1.
The transparent dielectric film the preparation method comprises the following steps: 1788 powder of polyvinyl alcohol for first weighing 6g is added to and fills 94g
In the beaker of ionized water, low temperature ultrasonic 0.5 hour, then to 100 degree, side agitating solution made it dissolve side heating deionized water,
10 hours a length of when this dissolution, low temperature ultrasonic 2 hours, it is spare to obtain uniform liquid again.The ferroelectricity small molecule of 1.2g is weighed again
Salt [HN (CH2CH2)3NH]FO4, it is dissolved in 8.8g deionized water, ultrasound 5 minutes obtains transparent and homogeneous liquid.It takes above two
Liquid, 5 points of ultrasound after the ferroelectricity small molecule salt deionized water solution mixing of the polyvinyl alcohol deionized water solution and 0.5g of 10g
Clock makes it be uniformly dispersed.It takes afterwards and carries out spin coating on the glass plate (long 7.6cm, wide 2.5cm) of 1g solution after the cleaning at uniform
Film.It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.06Mpa is placed 36 hours.Then 50 DEG C are warming up to, is taken out true
Sky, vacuum degree to 0.08Mpa are placed 10 hours.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 5 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 1455.1, is pure polyvinyl alcohol film obtained by method for making sample of the same race in same test condition
278.8 times of lower gained dielectric real part；The film is 81.9% in the transmitance of wavelength 650nm at room temperature.
Embodiment 6
The transparent dielectric film of the present embodiment 6, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 10:1.5.
The transparent dielectric film the preparation method comprises the following steps: 1788 powder of polyvinyl alcohol for first weighing 6g is added to and fills 94g
In the beaker of ionized water, low temperature ultrasonic 0.5 hour, then to 100 degree, side agitating solution made it dissolve side heating deionized water,
10 hours a length of when this dissolution, low temperature ultrasonic 2 hours, it is spare to obtain uniform liquid again.The ferroelectricity small molecule of 1.2g is weighed again
Salt [HN (CH2CH2)3NH]FO4, it is dissolved in 8.8g deionized water, ultrasound 5 minutes, available transparent and homogeneous liquid.It takes above-mentioned
Two kinds of liquid, ultrasound after the ferroelectricity small molecule salt deionized water solution mixing of the polyvinyl alcohol deionized water solution and 0.25g of 10g
5 minutes, it is made to be uniformly dispersed.Progress spin coating Cheng Jun on the glass plate (long 7.6cm, wide 2.5cm) of 1g solution after the cleaning is taken afterwards
Even film.It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.05Mpa is placed 24 hours.Then 50 DEG C are warming up to,
It vacuumizes, vacuum degree to 0.05Mpa, places 12 hours.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 6 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 604.6, be pure polyvinyl alcohol film obtained by method for making sample of the same race under the same test conditions
115.6 times of gained dielectric real part；The film is 87.7% in the transmitance of wavelength 650nm at room temperature.
Embodiment 7
The transparent dielectric film of the present embodiment 7, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 5:1.
The transparent dielectric film the preparation method comprises the following steps: 1799 powder of polyvinyl alcohol for first weighing 6g is added to and fills 94g
In the beaker of ionized water, low temperature ultrasonic 0.5 hour, then to 100 degree, side agitating solution made it dissolve side heating deionized water,
10 hours a length of when this dissolution, low temperature ultrasonic 2 hours, it is spare to obtain uniform liquid again.The ferroelectricity small molecule of 1.2g is weighed again
Salt [HN (CH2CH2)3NH][OOCCH2COO], it is dissolved in 8.8g deionized water, ultrasound 5 minutes, available transparent and homogeneous liquid
Body.Above two liquid is taken, the polyvinyl alcohol deionized water solution of 10g and the ferroelectricity small molecule salt deionized water solution of 0.5g are mixed
Ultrasound 5 minutes, make it be uniformly dispersed after conjunction.It takes and is carried out on the glass plate (long 7.6cm, wide 2.5cm) of 1g solution after the cleaning afterwards
Spin coating is at uniform film.It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.05Mpa is placed 24 hours.Then it rises
Temperature is vacuumized to 50 DEG C, vacuum degree to 0.05Mpa, is placed 12 hours.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 7 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 1408.7, is pure polyvinyl alcohol film obtained by method for making sample of the same race in same test condition
3.8 times of lower gained dielectric real part；The film is 58.5% in the transmitance of wavelength 650nm at room temperature.
Embodiment 8
The transparent dielectric film of the present embodiment 8, by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, described
The mass ratio of polyvinyl alcohol and hydrogeneous ferroelectricity salt is 5:1.
The transparent dielectric film the preparation method comprises the following steps: 1799 powder of polyvinyl alcohol for first weighing 6g is added to and fills 94g
In the beaker of ionized water, low temperature ultrasonic 0.5 hour, then to 100 degree, side agitating solution made it dissolve side heating deionized water,
10 hours a length of when this dissolution, low temperature ultrasonic 2 hours, it is spare to obtain uniform liquid again.The ferroelectricity small molecule of 1.2g is weighed again
Salt [HN (CH2CH2)3NH][OOCCH2COO], it is dissolved in 8.8g deionized water, ultrasound 5 minutes, available transparent and homogeneous liquid
Body.Take above two liquid, the ferroelectricity small molecule salt deionized water solution mixing of the polyvinyl alcohol deionized water solution and 1g of 10g
Ultrasound 5 minutes afterwards, make it be uniformly dispersed.It takes and is revolved on the glass plate (long 7.6cm, wide 2.5cm) of 2g solution after the cleaning afterwards
Paint uniform film.It is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree to 0.05Mpa is placed 24 hours.Then it heats up
It to 50 DEG C, vacuumizes, vacuum degree to 0.06Mpa, places 15 hours.Obtain the uniform transparent dielectric film of the present embodiment.
The transparent dielectric film that the present embodiment 8 is prepared, after tested, in the alternating electric field room temperature item that frequency is 0.1Hz
Under part, the dielectric value of real part of the film is 2028.3, is pure polyvinyl alcohol film obtained by method for making sample of the same race in same test condition
5.4 times of lower gained dielectric real part；The film is 48.1% in the transmitance of wavelength 650nm at room temperature.
Embodiment 9
In the present embodiment, by the polyvinyl alcohol and hydrogeneous ferroelectricity salt respectively according to 10:0.5,10:1,10:1.5,10:2
(it is added to different quality containing 5%, 10%, 15% and 20% hydrogeneous ferroelectricity salt [HN (CH2CH2)3NH]ClO4) mass ratio
Carry out compound preparation.Wherein, preparation method is the same as the specific steps in above-described embodiment 1.Hydrogeneous ferroelectricity salt uses [HN (CH2CH2)3NH]ClO4, polyvinyl alcohol is using 1788 powder of polyvinyl alcohol.The performance for the dielectric film being prepared is tested, and with
The thin-film dielectric test result for being not added with 1788 polyvinyl alcohol of hydrogeneous ferroelectricity salt compares, and comparing result is as shown in Figure 1.From
It can be seen that the addition of hydrogeneous ferroelectricity salt is in frequency so that the dielectric real part of polyvinyl alcohol film is obviously improved in Fig. 1
Under the conditions of the alternating electric field of 0.1Hz, the dielectric real part of polyvinyl alcohol film is obviously increased with the increase of ferroelectricity salt content.It is poly-
The dielectric real part of alcohol film improves 113-6270 times.
Polyvinyl alcohol and hydrogeneous ferroelectricity salt are subjected to the compound dielectric film being prepared according to the mass ratio of 10:0.5
Light transmittance in visible-range is compared with light transmittance of pure 1788 polyvinyl alcohol film in visible-range, right
It is more as shown in Figure 2 than result.From fig. 2 it can be seen that the addition of hydrogeneous ferroelectricity salt is without significantly influencing material film visible
Transparency in optical range.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. a kind of transparent dielectric film, it is characterised in that: by hydrogeneous ferroelectricity salt with polyvinyl alcohol is compound is prepared；Wherein, institute
The mass ratio for stating polyvinyl alcohol and hydrogeneous ferroelectricity salt is 10:0.1-3.
2. a kind of transparent dielectric film according to claim 1, it is characterised in that: the hydrogeneous ferroelectricity salt is with water-soluble
Property or the hydrogeneous ferroelectricity salt for dissolving in dimethyl sulfoxide.
3. a kind of transparent dielectric film according to claim 2, it is characterised in that: the hydrogeneous ferroelectricity salt is [HN
(CH2CH2)3NH]ClO4, or [HN (CH2CH2)3NH]FO4。
4. a kind of preparation method of transparent dielectric film as described in any one of claims 1-3, it is characterised in that: including as follows
Step:
(1) pva powder is added in the beaker for filling solvent, low temperature ultrasonic 0.5-5 hours, then heated solvent arrived
It is dissolved 0.5-12 hours at 80-100 DEG C, low temperature ultrasonic 0.5-5 hours again, it is spare to obtain uniform liquid；
(2) according to the mass ratio of hydrogeneous ferroelectricity salt and polyvinyl alcohol, hydrogeneous ferroelectricity salt is weighed, and is dissolved in deionized water or two
It is 1-5 minutes ultrasonic in methyl sulfoxide, it is spare to obtain uniform transparency liquid；
(3) spare transparency liquid obtained in spare liquid obtained in step (1) and step (2) is mixed, after mixing
1-5 minutes ultrasonic, be uniformly dispersed to obtain mixed solution；
(4) mixed solution obtained in step (3) is formed a film, is placed in 25 DEG C of vacuum drying ovens, vacuumizes, vacuum degree arrives
0.01-0.09Mpa is placed 10-48 hours；Then 50 DEG C are warming up to, is vacuumized, vacuum degree to 0.01-0.09Mpa places 5-
12 hours to get the transparent dielectric film.
5. a kind of preparation method of transparent dielectric film according to claim 4, it is characterised in that: in step (4), will walk
Suddenly spin coating at uniform film, or by mixed solution is poured into training on the glass plate of mixed solution after the cleaning obtained in (3)
It supports and forms a film in ware.
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