CN112979874B - Preparation method and application of polymer dispersed liquid crystal film containing terpenoid - Google Patents
Preparation method and application of polymer dispersed liquid crystal film containing terpenoid Download PDFInfo
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- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 title claims abstract description 52
- 150000003505 terpenes Chemical class 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 23
- 239000000178 monomer Substances 0.000 claims abstract description 18
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 17
- 239000004988 Nematic liquid crystal Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000012949 free radical photoinitiator Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 10
- 150000003254 radicals Chemical class 0.000 claims description 8
- -1 terpenoid compound Chemical class 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- GLZPCOQZEFWAFX-UHFFFAOYSA-N Geraniol Chemical compound CC(C)=CCCC(C)=CCO GLZPCOQZEFWAFX-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000005684 electric field Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- CRDAMVZIKSXKFV-FBXUGWQNSA-N (2-cis,6-cis)-farnesol Chemical compound CC(C)=CCC\C(C)=C/CC\C(C)=C/CO CRDAMVZIKSXKFV-FBXUGWQNSA-N 0.000 description 3
- 239000000260 (2E,6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-ol Substances 0.000 description 3
- GLZPCOQZEFWAFX-YFHOEESVSA-N Geraniol Natural products CC(C)=CCC\C(C)=C/CO GLZPCOQZEFWAFX-YFHOEESVSA-N 0.000 description 3
- 239000005792 Geraniol Substances 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical class CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 3
- 229940043259 farnesol Drugs 0.000 description 3
- 229930002886 farnesol Natural products 0.000 description 3
- 229940113087 geraniol Drugs 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- CRDAMVZIKSXKFV-UHFFFAOYSA-N trans-Farnesol Natural products CC(C)=CCCC(C)=CCCC(C)=CCO CRDAMVZIKSXKFV-UHFFFAOYSA-N 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 2
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
- 239000012965 benzophenone Substances 0.000 description 2
- UAHWPYUMFXYFJY-UHFFFAOYSA-N beta-myrcene Chemical compound CC(C)=CCCC(=C)C=C UAHWPYUMFXYFJY-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 2
- 125000004386 diacrylate group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000007823 ocimene derivatives Chemical class 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229940116411 terpineol Drugs 0.000 description 2
- XJPBRODHZKDRCB-UHFFFAOYSA-N trans-alpha-ocimene Natural products CC(=C)CCC=C(C)C=C XJPBRODHZKDRCB-UHFFFAOYSA-N 0.000 description 2
- QNODIIQQMGDSEF-UHFFFAOYSA-N (1-hydroxycyclohexyl)-phenylmethanone Chemical compound C=1C=CC=CC=1C(=O)C1(O)CCCCC1 QNODIIQQMGDSEF-UHFFFAOYSA-N 0.000 description 1
- AFTPEBDOGXRMNQ-UHFFFAOYSA-N 2,2,4-Trimethylhexane Chemical compound CCC(C)CC(C)(C)C AFTPEBDOGXRMNQ-UHFFFAOYSA-N 0.000 description 1
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- FIOCEWASVZHBTK-UHFFFAOYSA-N 2-[2-(2-oxo-2-phenylacetyl)oxyethoxy]ethyl 2-oxo-2-phenylacetate Chemical compound C=1C=CC=CC=1C(=O)C(=O)OCCOCCOC(=O)C(=O)C1=CC=CC=C1 FIOCEWASVZHBTK-UHFFFAOYSA-N 0.000 description 1
- LWRBVKNFOYUCNP-UHFFFAOYSA-N 2-methyl-1-(4-methylsulfanylphenyl)-2-morpholin-4-ylpropan-1-one Chemical compound C1=CC(SC)=CC=C1C(=O)C(C)(C)N1CCOCC1 LWRBVKNFOYUCNP-UHFFFAOYSA-N 0.000 description 1
- JHWGFJBTMHEZME-UHFFFAOYSA-N 4-prop-2-enoyloxybutyl prop-2-enoate Chemical compound C=CC(=O)OCCCCOC(=O)C=C JHWGFJBTMHEZME-UHFFFAOYSA-N 0.000 description 1
- GLZPCOQZEFWAFX-JXMROGBWSA-N Nerol Natural products CC(C)=CCC\C(C)=C\CO GLZPCOQZEFWAFX-JXMROGBWSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- VYBREYKSZAROCT-UHFFFAOYSA-N alpha-myrcene Natural products CC(=C)CCCC(=C)C=C VYBREYKSZAROCT-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 125000002619 bicyclic group Chemical group 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—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 a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/102—Esters of polyhydric alcohols or polyhydric phenols of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
- C09K19/544—Macromolecular compounds as dispersing or encapsulating medium around the liquid crystal
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
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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
- C08J2335/00—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 a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Derivatives of such polymers
- C08J2335/02—Characterised by the use of homopolymers or copolymers of esters
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- Liquid Crystal (AREA)
Abstract
The invention discloses a preparation method and application of a polymer dispersed liquid crystal film containing terpenoid, wherein the polymer dispersed liquid crystal film is prepared by heating positive nematic liquid crystal, acrylate monomer, terpenoid and free radical photoinitiator to be molten, uniformly mixing, adding into a liquid crystal box and carrying out ultraviolet curing. The polymer dispersed liquid crystal film has low driving voltage, terpenoid is introduced, the stability is good, the electro-optic performance is obviously improved, and the polymer dispersed liquid crystal film can be directly used for preparing a display device without a polarizing film or an orientation layer.
Description
Technical Field
The invention belongs to the technical field of liquid crystal film materials, and relates to a preparation method and application of a polymer dispersed liquid crystal film, in particular to a preparation method and application of a polymer dispersed liquid crystal film containing terpenoid.
Background
The liquid crystal/polymer composite material system combines the response characteristic of an external field of liquid crystal molecules, the high mechanical strength, the good flexibility and the easy processing characteristic of a polymer material, so that the prepared functional liquid crystal composite material can respond to the change of the external field and can be used for manufacturing flexible film products in a large scale by using a roll-to-roll processing technology.
The polymer dispersed liquid crystal film is mainly composed of liquid crystal and polymer, has the property of electric control dimming, liquid crystal molecules are randomly arranged when power is not applied, the film is in a scattering state due to the large difference of the refractive indexes of the liquid crystal and the polymer, and the appearance of the film is milky white; when the electric field is powered on, liquid crystal molecules are oriented along the direction of the electric field, the ordinary light refractive index of the liquid crystal is basically matched with the refractive index of the polymer, light can penetrate through the film, the film is in a transmission state at the moment, the appearance of the film is transparent, the transmittance of the film can be continuously adjusted by applying voltages with different intensities, and the electric control dimming effect is realized, so that the electric field dimming device is widely applied to related fields such as display devices.
The existing polymer dispersed liquid crystal film in the market generally has the driving voltage of over 75V, higher voltage and larger energy consumption, and simultaneously causes potential safety hazard, so that the reduction of the driving voltage of the polymer dispersed liquid crystal dimming film is very important for promoting the industrialized application of the film. The existing method for reducing the driving voltage of the polymer dispersed liquid crystal film generally changes the system formula or reaction conditions, the prepared polymer dispersed liquid crystal film has general stability, and the driving voltage reduction effect is insufficient.
Disclosure of Invention
An object of the present invention is to provide a method for preparing a polymer dispersed liquid crystal film containing terpenoid compounds, so as to achieve the purposes of reducing the driving voltage of the prepared polymer dispersed liquid crystal film and significantly improving the electro-optic performance;
another object of the present invention is to provide a terpenoid-containing polymer-dispersed liquid crystal film obtained by the above preparation method;
it is still another object of the present invention to provide an application of the above terpenoid-containing polymer dispersed liquid crystal film.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of a polymer dispersed liquid crystal film containing terpenoid comprises the steps of heating a positive nematic liquid crystal, an acrylate monomer, terpenoid and a free radical photoinitiator to be molten, uniformly mixing, adding into a liquid crystal box, and carrying out ultraviolet curing to obtain the polymer dispersed liquid crystal film containing terpenoid.
As a limitation of the invention, the weight ratio of the positive nematic liquid crystal, the acrylate monomer and the terpenoid is 20-80: 20-80: 1-10; the weight of the free radical type photoinitiator is 0.1-2% of the total weight of the positive nematic liquid crystal, the acrylate monomer and the terpenoid.
Among them, the positive nematic liquid crystal is a nematic liquid crystal having positive dielectric anisotropy.
As a second definition of the present invention, the acrylate monomer is a photopolymerizable non-liquid crystalline acrylate monofunctional monomer and/or an acrylate multifunctional monomer.
The terpenoid of the invention is a hydrocarbon compound which takes two isoprenes as basic structural units and an oxygen-containing derivative thereof.
The liquid crystal used in the invention is positive nematic liquid crystal, and liquid crystal materials sold in the market can be selected, such as SLC-1717, SLC-7011 or TEB30A of Yongsheng Huaqing liquid crystal materials Limited, E7, E44, E48 or ZLI-1275 of Germany Merck liquid crystal materials Inc, but the liquid crystal is not limited to the materials.
Acrylate monomers used in the present invention, such as, but not limited to, 3,5, 5-Trimethylhexane (TMHA), polyethylene glycol diacrylate 200(PEGDA200), polyethylene glycol diacrylate 400(PEGDA400), isobutyl methacrylate (IBMA), isobornyl acrylate (IBOA), 1, 4-butanediol diacrylate (BDDA), and the like.
The terpenoid used in the invention is a hydrocarbon compound with two isoprene as basic structural units and oxygenated derivatives thereof, and comprises three types of straight-chain type, monocyclic type and bicyclic type, such as ocimene, nerol, geraniol, myrcene, terpineol or farnesol, but not limited to the materials.
The radical photoinitiator used in the present invention is a substance that can absorb light with a certain wavelength to generate active radicals to initiate or catalyze polymerization of corresponding prepolymer monomers, such as Benzophenone (BP), 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide (TPO), Irgacure 651, Irgacure 184, Irgacure1173, Irgacure 754, or Irgacure 907, but is not limited to these materials.
As a fourth limitation of the present invention, the irradiation intensity of the ultraviolet light is 0.5mW/cm2-15mW/cm2。
As a fifth limitation of the present invention, the temperature of the heating is 50 to 70 ℃.
The invention also provides the terpenoid-containing polymer dispersed liquid crystal film prepared by the preparation method, which has a steeper electro-optic curve, a lower driving voltage and better electric control dimming performance.
The invention also provides an application of the terpenoid-containing polymer dispersed liquid crystal film, and the terpenoid-containing polymer dispersed liquid crystal film is directly used for preparing a display device without a polaroid and an orientation layer by utilizing the self electrically-controlled dimming characteristic.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
the terpenoid is introduced into the polymer dispersed liquid crystal film containing the terpenoid, so that the introduced compound has good compatibility with other components, good stability, reduced polymerization rate, remarkably improved electro-optic performance of the film and greatly reduced driving voltage.
The positive nematic liquid crystal has the effects that the positive liquid crystal molecules are oriented along the direction of an external electric field after the electric field is applied, and light is easier to penetrate, so that the liquid crystal film can obtain a better transparent state; the acrylate monomer has the effects of enabling the polymerization process to be simple and controllable and having good compatibility with positive nematic liquid crystal; the terpenoid has the function of adjusting the polymerization process and effectively improving the electro-optic performance of the obtained polymer dispersed liquid crystal film; the function of the free radical type photoinitiator is that the initiation process is rapid and efficient;
the preparation method is simple to operate and suitable for industrial production, and the prepared polymer dispersed liquid crystal film containing the terpenoid compounds is directly used for preparing a display device without a polaroid and an orientation layer by utilizing the self electric control dimming characteristic.
Drawings
The invention is described in further detail below with reference to the figures and the embodiments.
FIGS. 1 and 2 are graphs of an electro-optical curve and a driving voltage of a terpenoid-containing polymer dispersed liquid crystal film Y1 of example 8, respectively;
FIGS. 3 and 4 are graphs of an electro-optical curve and a driving voltage, respectively, of a terpenoid-containing polymer-dispersed liquid crystal film Y2 of example 8;
FIGS. 5 and 6 are graphs of an electro-optic curve and a driving voltage, respectively, of a terpenoid-containing polymer-dispersed liquid crystal film Y3 of example 8;
FIGS. 7 and 8 are graphs of an electro-optic curve and a driving voltage, respectively, of the terpenoid-containing polymer-dispersed liquid crystal film Y4 of example 8.
Detailed Description
The present invention is further illustrated by the following specific examples, which are to be construed as merely illustrative, and not limitative of the remainder of the disclosure.
EXAMPLES 1-7 preparation of Polymer dispersed liquid Crystal film containing terpenoid
Examples 1 to 7 are methods for preparing terpenoid-containing polymer-dispersed liquid crystal films by heating a positive nematic liquid crystal, an acrylate monomer, a terpenoid, and a radical photoinitiator at 50 to 70 ℃ to melt them, and then stirring them to form isotropic liquid crystal filmsCoating liquid on the edge of liquid crystal box, permeating into the liquid crystal box by capillary action, and placing at 0.5-15mW/cm2Irradiating under ultraviolet irradiation for 5min, and curing to obtain polymer dispersed liquid crystal film containing terpenoid, which is sequentially labeled as Y1-Y7. The preparation of examples 1-7 was essentially the same except for the choice of starting materials and the adjustment of other process parameters, as detailed in table 1.
Table 1 examples 1-7 process parameters
In table 1, the ratio of the radical photoinitiator is the ratio of the amount of the radical photoinitiator to the total amount of the positive nematic liquid crystal, the acrylate monomer and the terpenoid.
The prepared polymer dispersed liquid crystal film Y1-Y7 containing the terpenoid utilizes the self electric control dimming characteristic, and can be directly used for preparing a display device without a polaroid and an orientation layer.
EXAMPLE 8 Property measurement of Polymer dispersed liquid Crystal film containing terpenoid
Testing the electro-optical performance of the terpenoid-containing polymer dispersed liquid crystal film Y1-Y4 by using a liquid crystal parameter instrument, and recording a corresponding electro-optical curve and a driving voltage diagram, wherein the results are shown in figures 1-8;
wherein, V in the driving voltage diagramthThe expression threshold voltage means an applied voltage corresponding to a transmittance of 10% of the maximum value, VsatThe expression saturated voltage refers to the corresponding applied voltage when the transmittance reaches 90% of the maximum value;
as can be seen from FIG. 1, the electro-optic curve of the terpenoid-containing polymer dispersed liquid crystal film Y1 prepared after adding farnesol to the original system becomes steeper, which indicates that: the film is more uniform, and the electro-optic performance is improved;
from FIG. 2, it can be seen thatAfter addition of farnesol VthAnd VsatAll show a decrease in the driving voltage of the terpenoid-containing polymer dispersed liquid crystal film Y1;
as can be seen from FIG. 3, the electro-optic curve of terpenoid-containing polymer dispersed liquid crystal film Y1 prepared after terpineol was added to the original system becomes steeper, which indicates that: the film is more uniform, and the electro-optic performance is improved;
as can be seen from FIG. 4, V was measured after addition of terpineolthAnd VsatAll show a decrease in the driving voltage of the terpenoid-containing polymer dispersed liquid crystal film Y2;
as can be seen from FIG. 5, the electro-optic curve of the terpenoid-containing polymer dispersed liquid crystal film Y3 prepared after adding geraniol in the original system becomes steeper, which indicates that: the film is more uniform, and the electro-optic performance is improved;
as can be seen from FIG. 6, V after geraniol additionthAnd VsatAll are remarkably reduced, which indicates that the driving voltage of the terpenoid-containing polymer dispersed liquid crystal film Y3 is remarkably reduced;
as can be seen from fig. 7, the electro-optic curve film of the terpenoid-containing polymer dispersed liquid crystal film Y4 prepared by adding ocimene to the original system is more uniform, and the electro-optic performance is improved;
as can be seen from FIG. 8, V was observed after addition of OcimumthAnd VsatAll are remarkably reduced, which indicates that the driving voltage of the terpenoid-containing polymer dispersed liquid crystal film Y4 is remarkably reduced;
the results show that the polymer dispersed liquid crystal film Y1-Y4 containing terpenoid has good electric control dimming performance and low driving voltage, namely low energy consumption in use.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical content as a teaching to make changes or modifications to the equivalent embodiments with equivalent changes, but all those simple changes, equivalent changes and modifications made to the above-mentioned embodiments without departing from the technical spirit of the present invention, and still all those embodiments are within the scope of the present invention as claimed in the claims.
Claims (7)
1. The preparation method of the polymer dispersed liquid crystal film containing the terpenoid is characterized in that positive nematic liquid crystal, an acrylate monomer, the terpenoid and a free radical photoinitiator are heated to be molten and then uniformly mixed, added into a liquid crystal box and subjected to ultraviolet curing to obtain the polymer dispersed liquid crystal film containing the terpenoid.
2. The method for preparing a terpenoid-containing polymer-dispersed liquid crystal film according to claim 1, wherein the weight ratio of the positive nematic liquid crystal to the acrylate monomer to the terpenoid is 20-80: 20-80: 1-10; the weight of the free radical type photoinitiator is 0.1-2% of the total weight of the positive nematic liquid crystal, the acrylate monomer and the terpenoid.
3. The method for preparing a terpenoid-containing polymer-dispersed liquid crystal film according to claim 1 or 2, wherein the acrylate monomer is a photopolymerizable non-liquid crystalline acrylate monofunctional monomer and/or an acrylate multifunctional monomer.
4. The method for preparing a terpenoid-containing polymer-dispersed liquid crystal film according to claim 1 or 2, wherein the intensity of ultraviolet light is 0.5-15mW/cm2。
5. The method for preparing a terpenoid-containing polymer-dispersed liquid crystal film according to claim 1 or 2, wherein the heating temperature is 50-70 ℃.
6. A polymer dispersed liquid crystal film containing a terpenoid compound, characterized in that it is produced by the production method according to any one of claims 1 to 5.
7. Use of the terpenoid-containing polymer-dispersed liquid crystal film of claim 6 for the preparation of a display device.
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Citations (11)
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