CN115678569B - Liquid crystal composition and application thereof - Google Patents
Liquid crystal composition and application thereof Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 161
- 239000000203 mixture Substances 0.000 title claims abstract description 42
- 150000001875 compounds Chemical class 0.000 claims abstract description 73
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 claims abstract description 22
- 125000004432 carbon atom Chemical group C* 0.000 claims description 25
- 125000003342 alkenyl group Chemical group 0.000 claims description 24
- 125000003545 alkoxy group Chemical group 0.000 claims description 24
- 125000005819 alkenylalkoxy group Chemical group 0.000 claims description 17
- 125000000217 alkyl group Chemical group 0.000 claims description 15
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 claims description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- 125000006701 (C1-C7) alkyl group Chemical group 0.000 claims description 9
- 239000012769 display material Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 27
- 230000004044 response Effects 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 12
- 238000005259 measurement Methods 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- -1 bicyclic compound Chemical class 0.000 description 4
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- GOYDNIKZWGIXJT-UHFFFAOYSA-N 1,2-difluorobenzene Chemical compound FC1=CC=CC=C1F GOYDNIKZWGIXJT-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 108090000397 Caspase 3 Proteins 0.000 description 2
- 102100029855 Caspase-3 Human genes 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 125000002433 cyclopentenyl group Chemical group C1(=CCCC1)* 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- QZGUYBAIILRCEG-UHFFFAOYSA-N 1,2-difluorodibenzofuran Chemical compound C1=CC=C2C3=C(F)C(F)=CC=C3OC2=C1 QZGUYBAIILRCEG-UHFFFAOYSA-N 0.000 description 1
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- DHXVGJBLRPWPCS-UHFFFAOYSA-N Tetrahydropyran Chemical compound C1CCOCC1 DHXVGJBLRPWPCS-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000000304 alkynyl group Chemical group 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
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- 125000000596 cyclohexenyl group Chemical group C1(=CCCCC1)* 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
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- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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- 239000004761 kevlar Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- PYLWMHQQBFSUBP-UHFFFAOYSA-N monofluorobenzene Chemical compound FC1=CC=CC=C1 PYLWMHQQBFSUBP-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- Liquid Crystal Substances (AREA)
Abstract
The invention provides a liquid crystal composition and application thereof, wherein the liquid crystal composition comprises at least one liquid crystal compound of a component I, a component II and a component III, and has higher vertical dielectric constant value, nematic phase in a wider temperature range and lower rotational viscosity, thereby being beneficial to improving the light transmittance of a liquid crystal display, improving the display image quality and saving energy.
Description
Technical Field
The invention relates to the field of liquid crystal materials, in particular to a liquid crystal composition and application thereof.
Background
In the 60 s of the 20 th century, RCA corporation discovered for the first time that the light transmission mode of liquid crystals was changed by electric stimulation, and then after the liquid crystal display technology was released by applying this property, liquid crystals gradually attracted high attention and rapidly developed to various fields. In 1966, duPont had synthesized Kevlar fibers using aramid liquid crystals, and the liquid crystal materials began the industrialization process. Through rapid development for decades, the liquid crystal material has been widely applied to various fields such as display technology, optical storage equipment, solar cells and the like by virtue of the special properties, and the research scope is more over the fields such as chemistry, biology, information science and the like, so that the liquid crystal material becomes one of the favored and indispensable novel materials in the current society.
With the recent trend of science and technology, the requirements of liquid crystal materials are also increasing. The development of liquid crystal materials is expected to mainly have the following aspects in the future: (1) The new process for preparing the existing liquid crystal material is explored, the generation of byproducts and harmful substances is reduced, and the production cost is reduced; (2) The performance of the existing liquid crystal material is modified, such as reducing the requirement on the environmental temperature, improving the color richness and diversity of the liquid crystal material for display, etc.; (3) The novel functional liquid crystal material is prepared to meet the high standard use requirements of multiple fields, such as novel liquid crystal material for display, novel photoelectric liquid crystal storage material in the field of information engineering, novel medicinal liquid crystal material in the field of bioengineering and the like.
Liquid crystal displays can be divided into passive matrix (also called passive matrix or simple matrix) and active matrix (also called active matrix) driving methods. Among them, the active matrix lcd is to change the arrangement of liquid crystal compounds by applying a voltage, so as to change the light emission intensity of the backlight source to form an image, and is increasingly popular due to its characteristics of high resolution, high contrast, low power, thin surface and light weight. Active matrix liquid crystal displays can be classified into two types according to active devices: a MOS (metal oxide semiconductor) or other diode on a silicon chip as a substrate; among them, the most rapidly developed thin film transistor (Thin Film Transistor-TFT) is a thin film transistor liquid crystal display (TFT-LCD) which has been well applied to display devices such as mobile phones, computers, liquid crystal televisions, cameras, etc., and is the mainstream product of the liquid crystal market.
In recent years, with the rapid growth of smart phone markets, smart phones face challenges such as high resolution and low power consumption. As the resolution requirement of the display screen increases, the aperture ratio of the liquid crystal panel tends to decrease, resulting in a decrease in light transmittance of the liquid crystal panel, and in order to increase the light transmittance of the liquid crystal panel, the brightness of the backlight needs to be further enhanced, so that the energy consumption is further increased. In addition, fringe Field Switching (FFS) technology is not prone to "moire" due to its being pressed, and is widely used in touch screen Liquid Crystal Displays (LCDs) such as mobile phones and flat panels. But its light transmittance is low due to the non-uniformity of its electric field distribution, and this light transmittance drop is significantly smaller for negative FFS than for positive FFS. Since positive materials are superior to negative materials in response speed and reliability, in some applications requiring high reliability, positive materials are required to be selected, and in order to increase the light transmittance, the vertical dielectric constant can be improved by adding a small amount of negative materials.
Disclosure of Invention
The invention aims to: the main purpose of the present invention is to provide a nematic phase with higher vertical dielectric constant value, wider temperature range and lower rotational viscosity, so as to solve the problem of high energy consumption caused by insufficient light transmittance of the liquid crystal material in the prior art.
The technical scheme is as follows: the present invention provides a liquid crystal composition comprising at least one liquid crystal compound of component I, at least one liquid crystal compound of component II and a liquid crystal compound of component III.
The component I is selected from one or more of the formulas I1-I4, and the formulas I1-I4 are as follows:
In the formulas I1-I4, R 1 is selected from H, F, C-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, R 1' is selected from H, F, C-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl, or is cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy;
the component II is selected from the formula II1, and the formula II1 is as follows:
Wherein Y 1 and Y 2 are each independently selected from C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy; y 1 and Y 2 can also each independently be
X is oxygen O or sulfur S;
The component III is a bi-, tri-and/or tetra-cyclic nonpolar or weakly polar compound.
According to another aspect of the present invention, there is provided the use of the above liquid crystal composition in a liquid crystal display material or a liquid crystal display device.
The beneficial effects are that: the liquid crystal composition has higher vertical dielectric constant value, nematic phase with wider temperature range and lower rotational viscosity, and can solve the problem of high energy consumption caused by insufficient light transmittance of the liquid crystal material in the prior art.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The present application will be described in detail with reference to examples.
The application is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the application as claimed.
In order to solve the above-described problems, in an exemplary embodiment of the present invention, there is provided a liquid crystal composition including at least one liquid crystal compound of component I, at least one liquid crystal compound of component II, and at least one liquid crystal compound of component III.
The component I is selected from one or more of the formulas I1-I4, and the formulas I1-I4 are as follows:
In the formulas I1-I4, R 1 is selected from H, F, C-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, R 1' is selected from H, F, cl, C-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl, or is cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy;
the component II is selected from the formula II1, and the formula II1 is as follows:
Wherein Y 1 and Y 2 are each independently selected from C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy; y 1 and Y 2 can also each independently be
X is oxygen O or sulfur S;
The component III is a bi-, tri-and/or tetra-cyclic nonpolar or weakly polar compound.
The liquid crystal compound with positive dielectric constant of the component I is white in a pure substance state, and has higher dielectric constant anisotropy delta epsilon due to the difluoro methoxy ether bond in the center of the component I compound. Wherein according to the driving voltage formulaThe driving voltage is inversely proportional to the dielectric anisotropy delta epsilon, which means that the higher the dielectric anisotropy delta epsilon, the lower the driving voltage, which is beneficial to energy saving. In combination with a response time formula driven according to voltageIt is understood that τ on is inversely proportional to the dielectric anisotropy Δε, which means that the higher the dielectric anisotropy Δε, the lower the response time, and the faster the response speed.
The liquid crystal compound having a negative dielectric constant of component II is white in a pure state, and is characterized by having a large dipole effect in a direction perpendicular to the long axis of the molecule, and thus the component of the corresponding dielectric constant in the vertical direction is relatively large, that is, has a high vertical dielectric constant epsilon ⊥, and thus the dielectric anisotropy Δepsilon=epsilon //-ε⊥ exhibits a negative value. The liquid crystal molecules tend to be distributed along the direction perpendicular to the electric field due to the high vertical dielectric constant epsilon ⊥, so that a low pretilt angle is shown, the negative liquid crystal material is arranged on a horizontal plane under the fringe electric field, and the pretilt angle distribution is more uniform than that of the positive material, so that the liquid crystal display has high light transmittance and wide viewing angle, is beneficial to energy saving, and can improve the image display quality so as to better meet the performance requirements of liquid crystal display.
The liquid crystal compound with component III, wherein the bicyclic compound is white solid or transparent colloid in pure state, is a liquid crystal compound with weak polarity or nonpolar, and is characterized by lower rotational viscosity and lower melting point, thus having better intersolubility when being mixed with other liquid crystal compounds, and can improve the overall viscosity of the liquid crystal material, and the combination of the liquid crystal compound and the liquid crystal compound has the characteristic of being prepared according to a voltage driving response time formulaIt is understood that τ on is proportional to the value of rotational viscosity γ 1, which means that the lower the value of rotational viscosity γ 1, the lower the response time, and the faster the response speed.
The liquid crystal compound with the component III, wherein the tricyclic and tetracyclic compounds are white solids in a pure state and are liquid crystal compounds with weak polarity or nonpolar, is characterized by higher clear points, and is beneficial to increasing the liquid crystal temperature width of the liquid crystal composition.
When the liquid crystal compound with the component II is combined with the liquid crystal compound with the components I and III, the liquid crystal compound with the component II can obtain a proper vertical dielectric constant by adding a small amount, so that the liquid crystal composition can keep a high positive dielectric constant and rotational viscosity, thereby being beneficial to reducing the driving voltage and increasing the response speed. In summary, the liquid crystal composition formed by combining the liquid crystal compounds of the component I, the component II and the component III can be used for improving the response speed, the driving voltage, the optical property and the like of the liquid crystal material.
Furthermore, it should be clear to a person skilled in the art that the above alkyl groups include not only straight chain alkyl groups but also corresponding branched chain alkyl groups.
In order to obtain a more suitable liquid crystal width, a higher dielectric anisotropy value, a smaller rotational viscosity and a suitable elastic coefficient K, it is more advantageous to increase the response speed of the liquid crystal material, decrease the threshold voltage, and improve the intersolubility of the liquid crystal material, and in a preferred embodiment of the present application, the liquid crystal compound of the general formula III is a liquid crystal compound having formulae V1 to V10.
The nonpolar compounds V1 to V10 are each:
In the formulas V1 to V10, R 5、R6 is independently selected from H, F, alkyl with 1 to 7 carbon atoms, alkoxy with 1 to 7 carbon atoms, alkenyl with 2 to 7 carbon atoms or alkenylalkoxy with 2 to 7 carbon atoms, or cyclopentyl substituted by alkyl with 1 to 7 carbon atoms, alkoxy with 1 to 7 carbon atoms or alkenyl with 2 to 7 carbon atoms. The above-mentioned nonpolar liquid crystal compounds V1 to V3 have a lower rotational viscosity γ 1, the response time of which is proportional to the rotational viscosity γ 1, indicating that the lower the value of the rotational viscosity γ 1, the lower the response time, the faster the response speed, and the liquid crystal compositions having the above-mentioned nonpolar liquid crystal compounds V1 to V3 can be used for manufacturing a liquid crystal medium having a rapid response. The nonpolar liquid crystal compounds V4 to V7 have higher clearing point temperature and are mainly used for adjusting the T NI value of a system, so that the liquid crystal composition with the nonpolar liquid crystal compounds V4 to V7 is beneficial to improving the upper limit temperature of the use of a liquid crystal medium and widening the working temperature range of the liquid crystal medium. The nonpolar liquid crystal compounds V8 and V9 have a terphenyl structure, V10 have an alkynyl benzene structure, and are both large conjugated system compounds, which is advantageous in increasing the optical anisotropy Δn value of the system, and generally, the higher the Δn value, the lower the d value, and the response speed is inversely proportional to the d value, so that the response speed of the liquid crystal composition having the nonpolar liquid crystal compounds V8 to V10 has a more desirable value.
The liquid crystal composition of the present invention can be prepared according to a conventional method. The desired amount of the components is dissolved in the components constituting the main ingredient in a relatively low amount, usually at high temperature; the solutions of the components may also be mixed with an organic solvent, for example, acetone, chloroform or methanol, and after thorough mixing, the solvent is removed again, for example, by distillation.
In addition to the liquid crystal compounds including the above-described component I, component II and component III, any kind of liquid crystal compound may be selected according to purposes to constitute the liquid crystal composition together with the liquid crystal composition of the present invention, and other additives in the art may be added as required. For example, polymerizable compounds, optically active components and/or stabilizers may be added in a mass content of 0 to 20%.
The components of the polymerizable compound are as follows:
wherein,
-T 1 and-T 2 are each independently representedOr an epoxy group;
-Q 1 -and-Q 2 -each independently represent a single bond or an alkyl group having 1 to 8 carbon atoms;
-P 1 -and-P 2 -each independently represent a single bond, -O-, CO-, COO-, or-OCO-;
k is 0, 1 or 2;
When k is 1, -Z 1 -represents a single bond 、—O—、—CO—、—COO—、—OCO—、—CH2O—、—OCH2—、—C2H4—、—CF2O—、—OCF2—、-C≡C-、—CH＝CH—、
When k is 2, -Z 1 -appears twice in the component, -Z 1 -each occurrence independently represents a single bond 、—O—、—CO—、—COO—、—OCO—、—CH2O—、—OCH2—、—C2H4—、—CF2O—、—OCF2—、-C≡C-、—CH＝CH—、
Representation ofWherein-CH 2 -on the cyclohexyl group may be substituted by O, or representsWherein =ch-on the benzene ring may be substituted with N, H on the benzene ring may be substituted with F, or represents
When the number k is 1, the number,Representation ofWherein-CH 2 -on the cyclohexyl group may be substituted by O, or representsWherein =ch-on the benzene ring may be substituted with N, H on the benzene ring may be substituted with F, or represents
When k is 2, two are included in the compositionI.e.Two occurrences of the presence of the component(s),Each occurrence is independentlyWherein-CH 2 -on the cyclohexyl group may be replaced by O, orWherein =ch-on the benzene ring may be substituted by N, H on the benzene ring may be substituted by F, or
The above optically active components are preferably:
Wherein R 2' is a halogenated or unsubstituted alkyl, alkoxy or alkenyl group having from 1 to 7 carbon atoms.
The above stabilizers are preferably one or more of the compounds having the formula VI1 to VI 5:
Wherein R 2 is an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, a halogenated alkyl group having 1 to 7 carbon atoms, a halogenated alkoxy group having 1 to 7 carbon atoms, or a halogenated alkenyl group having 2 to 7 carbon atoms; the alkyl, alkoxy and alkenyl groups are straight or branched alkyl, alkoxy and alkenyl groups;
Selected from the group consisting of
The content of the liquid crystal compound in the liquid crystal composition may be adjusted according to the performance requirements of the liquid crystal material, and in a preferred embodiment of the present invention, the content by weight of the liquid crystal compound having the component I in the liquid crystal composition is 0.1 to 75%, preferably 0.1 to 50%, further preferably 0.1 to 30%, the content by weight of the liquid crystal compound having the component II is 0.1 to 25%, preferably 0.1 to 10%, and the content by weight of the liquid crystal compound having the component III is 0.1 to 75%, preferably 0.1 to 50%.
The remaining ingredients may be added in accordance with the teachings of the present invention as set forth above. In general, the sum of the percentages of the components is 100%.
In yet another exemplary embodiment of the present application, there is provided a use of the above liquid crystal composition in a liquid crystal display device. The liquid crystal composition can be applied to the preparation of liquid crystal display materials or liquid crystal display devices, and can significantly improve the performance of the liquid crystal display materials or the liquid crystal display devices. The liquid crystal composition is preferably applied to an in-plane switching (IPS) or Fringe Field Switching (FFS) mode liquid crystal display.
The advantageous effects of the present invention will be further described below with reference to examples and comparative examples.
The following examples are intended to illustrate the invention without limiting it, and are all percentages by mass and temperatures are given in degrees celsius. The measured physicochemical parameters are expressed as follows: t NI represents a clearing point; Δn represents optical anisotropy (Δn=n e-no, 589nm, measured temperature 25 ℃); delta epsilon represents dielectric anisotropy (delta epsilon=epsilon ||-ε⊥, measured temperature 25 ℃); k 11 represents the coefficient of elasticity of the splay (measured temperature 25 ℃); gamma 1 represents rotational viscosity (measured temperature 25 ℃) and T NI was measured by DSC; measuring delta n by using an abbe refractometer; delta epsilon, k 11, and gamma 1 were measured using CV.
In various embodiments of the present invention, the liquid crystal molecular backbone nomenclature: cyclohexyl groupIndicated by the letter C; benzene ringIndicated by the letter P; cyclohexenyl groupRepresented by A; positive dielectric difluorobenzeneRepresented by U; tetrahydropyraneRepresented by J; methoxy bridge-CH 2 O-is represented by B; difluoromethoxy bridge-CF 2 O-is represented by Q; alkynyl groupRepresented by G; monofluorobenzeneIndicated by the letter H1; negative dielectric difluorobenzeneRepresented by W; difluoro dibenzofuranIndicated by the letter X1; -OCF 3 is denoted by the letter OTF.
The corresponding codes for specific group structures are shown in table 1:
TABLE 1
Each compound branch is converted into a chemical formula according to table 2 below, with the left side branch being denoted R1 and the right side branch being denoted R2. Wherein the radicals C nH2n+1 and C mH2m+1 are straight-chain alkyl radicals having n and m carbon atoms, respectively, cp representing cyclopentylC nH2n+1 Cp represents a cyclopentyl group having a linear alkyl group of n carbon atoms; ca represents cyclopentenylC nH2n+ 1 Ca represents cyclopentenyl groups having a linear alkyl group of n carbon atoms, respectively. The cyclopentenyl nomenclature is named with reference to the cyclopentyl nomenclature. When named the main chain is preceded and the branched chain is followed, the main chain and the branched chain are separated by a "-" such asAt a pH of 1U-CpF,Represented by the reference numeral DPU-CpF,In the form of PUQU-CpF,Represented by the formula PH1UQU-CpF,As indicated by the term CCP-31,Represented by the reference numeral CW-3O2,Represented by X1-2 OCy.
In addition, liquid crystal compoundExpressed in 3 HHV; In a 5HHV table; indicated at VHHP 1; represented by CC31D 1; Represented by PH1P-F3 Represented by 1V2CCP1,X1-MaO is represented by the formula,Represented by PH2P-CpC4E 1;
TABLE 2
Example 1
The liquid crystal composition of example 1 and the measurement parameters are shown in Table 3.
TABLE 3 Table 3
Wherein DH1UQU-CpF, CH1UQU-CpF, PUQU-CpF, PH1UQU-CpF, PH1UQU-3CpF and PH1UQU-2CpF are liquid crystal compounds of component I; X1-MaO is a liquid crystal compound of component II; 3HHV is a liquid crystal compound of component III.
Example 2
The liquid crystal composition of example 2 and the measurement parameters are shown in Table 4.
TABLE 4 Table 4
Liquid crystal compounds in which DH1UQU-CpF, CH1UQU-CpF, PUQU-CpF, PH1UQU-3CpF and PH1UQU-2CpF are component I; X1-MaO is a liquid crystal compound of component II; 3HHV is a liquid crystal compound of component III.
Example 3
The liquid crystal composition of example 3 and the measurement parameters are shown in Table 5.
TABLE 5
Liquid crystal compounds in which CH1UQU-CpF, PUQU-CpF, PH1UQU-CpF, PH1UQU-3CpF and PH1UQU-2CpF are component I; X2-CaO2 is a liquid crystal compound of the component II; 3HHV, CPP-32, CPPC-33 are liquid crystal compounds of component III.
Example 4
The liquid crystal composition of example 4 and the measurement parameters are shown in Table 6.
TABLE 6
Liquid crystal compounds in which CH1UQU-CpF, PUQU-CpF, PH1UQU-CpF, PH1UQU-3CpF and PH1UQU-2CpF are component I; X2-CaO2 and X1-MaO2 are liquid crystal compounds of the component II; 3HHV, CPP-32, CPPC-33 are liquid crystal compounds of component III.
Example 5
The liquid crystal composition of example 5 and the measurement parameters are shown in Table 7.
TABLE 7
Liquid crystal compounds in which DH1UQU-CpF, PUQU-CpF, CH1UQU-CpF, PH1UQU-3CpF and PH1UQU-2CpF are component I; X1-MaO is a liquid crystal compound of component II; 3HHV, VHHP1, CPPC-33, CH1PC-33 are liquid crystal compounds of component III.
Example 6
The liquid crystal composition of example 6 and the measurement parameters are shown in Table 8.
TABLE 8
Liquid crystal compounds in which PH1UQU-3CpF, PH1UQU-2CpF, DH1UQU-CpF PH1UQU-CpF and PUQU-3CpF are component I; X1-MaO is a liquid crystal compound of component II; 3HHV is a liquid crystal compound of component III.
Example 7
The liquid crystal composition of example 7 and the measurement parameters are shown in Table 9.
TABLE 9
Liquid crystal compounds in which PH1UQU-3CpF, PH1UQU-2Cp, DH1UQU-CpF, PH1UQU-CpF and PUQU-3CpF are component I; liquid crystal compounds of which X1-MaO and X1-2OOCp are component II; 3HHV is a liquid crystal compound of component III.
Comparative example 1
The composition of the liquid crystal composition of comparative example 1 and the measurement parameters are shown in Table 10.
Table 10
Comparative example 2
The composition of the liquid crystal composition of comparative example 2 and the measurement parameters are shown in Table 11.
TABLE 11
The liquid crystal compounds of component I, component II and component III are not completely used in the above two comparative examples. As can be seen from comparison with examples 1 to 7, the vertical dielectric constants epsilon ⊥ of both comparative examples are smaller than the corresponding values of each example. Meanwhile, comparative example 1 has a similar rotational viscosity γ 1 to examples 4 and 5, but the dielectric constants Δ∈ and the splay elastic coefficients k 11 of examples 4 and 5 are all significantly higher than those of comparative example 1; comparative example 2 has a similar rotational viscosity γ1 to example 6, but the dielectric constant Δεand the splay elastic modulus k 11 of example 6 are also significantly higher than those of comparative example 2.
From the comparison of the above examples with the comparative examples, it is found that the liquid crystal composition having the components I, II and III is particularly advantageous in increasing the vertical dielectric constant ε ⊥ of the system, increasing the dielectric constant Δεof the system, improving the rotational viscosity of the system, widening the service temperature range of the liquid crystal, increasing the elastic modulus, thereby improving the light transmittance, increasing the response speed, reducing the driving voltage, saving energy and improving the contrast ratio.
It has also been found from the above examples that when the liquid crystal compound of component I is combined with the liquid crystal compound having component II and component III to form a liquid crystal composition, a liquid crystal composition having suitable optical anisotropy, gao Qingliang points, lower viscosity and higher dielectric anisotropy value can be obtained, and can be used for manufacturing a low-driving, fast-responding liquid crystal medium. The above measurement parameters are related to the physicochemical properties of all the liquid crystal compounds constituting the liquid crystal medium, and the liquid crystal composition of the present invention is mainly used for adjusting the liquid crystal parameters of the system.
Although not exhaustive of all liquid crystal compositions to be claimed, it is anticipated by those skilled in the art that, based on the embodiments disclosed above, other similar materials can be obtained in a similar manner without the need for inventive effort, with only professional attempts at itself. Representative embodiments are only exemplified herein for limited space.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A liquid crystal composition is characterized by comprising the following components in percentage by mass
42 To 54.52 percent of liquid crystal compound of component I, 2.62 to 5.10 percent of liquid crystal compound of component II and 42.86 to 55 percent of liquid crystal compound of component III;
The component I is selected from one or more of the general formulas I1-I4, and the general formulas I1-I4 are as follows:
In the formulas I1-I4, R 1 is selected from H, F, C-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, R 1' is selected from H, F, C-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl, or is cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy;
the component II is selected from the formula II1, and the formula II1 is as follows:
II1、
Wherein Y 1 and Y 2 are each independently selected from C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy, or cyclopentyl substituted by C1-C7 alkyl, C1-C7 alkoxy, C2-C7 alkenyl or C2-C7 alkenylalkoxy; at least one of Y 1 and Y 2 is C2-C7 alkenyl-substituted cyclopentyl or
X is O or S;
The component III is selected from one or more of the formulas V1-V10, wherein the formulas V1-V10 are as follows:
in the formulas V1 to V10, R 5、R6 is independently selected from H, F, alkyl with 1 to 7 carbon atoms, alkoxy with 1 to 7 carbon atoms, alkenyl with 2 to 7 carbon atoms or alkenylalkoxy with 2 to 7 carbon atoms, or cyclopentyl substituted by alkyl with 1 to 7 carbon atoms, alkoxy with 1 to 7 carbon atoms or alkenyl with 2 to 7 carbon atoms.
2. Use of the liquid crystal composition according to claim 1 in a liquid crystal display material or a liquid crystal display device.
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| CN111518570A (en) * | 2020-04-28 | 2020-08-11 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition, liquid crystal display element and liquid crystal display |
| CN111748357A (en) * | 2019-03-29 | 2020-10-09 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition and liquid crystal display device |
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| CN110358548A (en) * | 2018-07-24 | 2019-10-22 | 石家庄诚志永华显示材料有限公司 | Liquid-crystal composition and liquid crystal display component |
| JP2020084021A (en) * | 2018-11-26 | 2020-06-04 | Jnc株式会社 | Liquid crystal composition and liquid crystal display element |
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