CN104140825B - A kind of Nematic phase liquid crystal material with ultra-high double refraction rate - Google Patents
A kind of Nematic phase liquid crystal material with ultra-high double refraction rate Download PDFInfo
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- CN104140825B CN104140825B CN201410350708.XA CN201410350708A CN104140825B CN 104140825 B CN104140825 B CN 104140825B CN 201410350708 A CN201410350708 A CN 201410350708A CN 104140825 B CN104140825 B CN 104140825B
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Abstract
The invention belongs to liquid crystal material technical field.The Nematic phase liquid crystal material of ultra-high double refraction rate of the present invention is by having wider nematic phase range, compared with the mixture component A of the tolane analog derivative of low melting point, there is the benzene cyanides B component of higher two-fold rate, there is high two-fold rate and the larger pyrimidines component C of polarity, the Terphenyls Compound D component that clearing point upper side base is fluorine-containing, there is high birefringence rate and the fluorine-containing ethynyl biphenyl compound component E of side base, the dicyclic hexane compound F 17-hydroxy-corticosterone component that viscosity is low, there is isothiocyano benzene-like compounds G component and the difluoroethylene compounds H component composition of ultra-high double refraction rate, the mass percent sum of each component is 100% above.The present invention is obtained by the multiple compound mixture with different molecular structures, has ultra-high double refraction rate, relatively low viscosity, larger dielectric anisotropy and wider use temperature scope.
Description
Technical field
The invention belongs to liquid crystal material technical field, particularly, relate to a kind of Nematic phase liquid crystal material with ultra-high double refraction rate, especially the field such as optical phased array and optical communication provides a kind of high performance liquid crystal material.
Background technology
That applies along with laser apparatus and opticfiber communication popularizes, and the requirement that people regulate and control light is more and more higher, and new technology constantly occurs, wherein optical phased array technology has broad application prospects in dual-use beam flying.Except in laser display, laser communication and laser photo-typesetting etc., most important application is the Military Application such as phased-array laser radar, laser space communication field.Optical phased array technology not only makes the phased-array laser radar system of low cost become possibility, and it also will represent great advantage in target acquistion, high precision tracking/aiming, high-resolution imaging and ADAPTIVE OPTICS SYSTEMS etc.Traditional beam flying normally adopts a tilting mirror or galvanometer to realize.The method optical loss of this employing mechanical movement is little, and sweep limit is large and structure simple, but its sweep velocity and precision relatively low.In order to improve beam scanning rate, reduce the volume weight of device, adapt to the needs of the special dimension application such as space, people's facility electrooptical material realizes beam deflection.Its principle utilizes electrooptical material to make the optical phase of beam wave surface produce periodic modulation, when each phase modulation unit of phase modulator display obtain one spatially linear distribution time dependent phase place time, beam wave surface will be made to deflect in space, produce the effect of far field interfering beam scanning.Relative to mechanical scanning, optical phased array technology has the advantages such as scanning accuracy is high, speed fast, flexible, volume is little, lightweight, low in energy consumption.
The research of current optical phased array technology is mainly based on liquid crystal, electro-optic crystal (such as LiNiO
3), electro-optic ceramics three class material.Because optical phase modulation voltage is directly proportional to material birefringence rate, when film thickness is certain, degree of birefringence is larger, and the beam deflection realized is larger.The optical phased array developed by electro-optic crystal and electro-optic ceramics is very large due to phase shifter spacing, can not obtain efficient wide-angle Beam Control and little aperture packing factor makes Insertion Loss very large, is thus difficult to obtain the practical device of high-performance.Obtaining the optical phased array material that really energy is practical must filming.Liquid crystal birefringence rate is larger, driving voltage is low, the comparable electro-optic crystal of thickness of detector or electro-optic ceramics significantly thinning, can reduce marginal effect of electric field and optical diffraction and comparatively easily form the two-dimensional scan of light beam, the optical phased array therefore based on high birefringence rate liquid crystal becomes study hotspot in the last few years.
Summary of the invention
The present invention is directed to above problem, a kind of Nematic phase liquid crystal material of ultra-high double refraction rate is provided, is mainly used in the field such as optical phased array and optical communication.In the prior art, general liquid crystal birefringence rate is between 0.2-0.3, is greater than 0.3 and namely thinks to have higher degree of birefringence, and high birefringence rate is those skilled in the art pursued always.Nematic liquid crystal provided by the invention has the birefringence value of superelevation, lower viscosity, larger dielectric anisotropy and wider use temperature scope, be applied to be conducive in optical phased array and optical communication reducing thickness of detector, boost device response speed.
The Nematic phase liquid crystal material with ultra-high double refraction rate of the present invention, its degree of birefringence is more than 0.38, by mass percentage, composed of the following components: 25%-35% component A, the B component of 12%-18%, the component C of 2%-8%, the D component of 5%-10%, the component E of 30%-40%, the F component of 1%-5%, the G component of 2%-8% and the H component of 1%-5%, the mass percent sum of each component above is 100%.
Particularly, the Nematic phase liquid crystal material of ultra-high double refraction rate of the present invention, it by mass percentage, by having wider nematic phase range, compared with the mixture component A (content 25%-35%) of the tolane analog derivative of low melting point, there is the benzene cyanides B component (content 12%-18%) of higher two-fold rate, there is high two-fold rate and the larger pyrimidines component C (content 2%-8%) of polarity, the Terphenyls Compound D component (content 5%-10%) that clearing point upper side base is fluorine-containing, there is high birefringence rate and the fluorine-containing ethynyl biphenyl compound component E (content 30%-40%) of side base, the dicyclic hexane compound F 17-hydroxy-corticosterone component (content 1%-5%) that viscosity is low, there is isothiocyano benzene-like compounds G component (content 2%-8%) and difluoroethylene compounds H component (content 1%-5%) composition of ultra-high double refraction rate, the mass percent sum of each component is 100% above.
Wherein, the chemical formula of described A-H component is as follows:
In formula, R
1~ R
11for saturated alkyl-C
nh
2n+1, saturated alkoxyl group-OC
nh
2n+1or end is the alkyl chain-C of ethylene linkage
nh
2ncH=CH
2;
X
1~ X
7for the one in H, F and N;
A, B are the one in following groups:
or
As preferably, the Nematic phase liquid crystal material with ultra-high double refraction rate of the present invention, by mass percentage, composed of the following components: 26%-30% component A, the B component of 14%-16%, the component C of 4%-6%, the D component of 6%-10%, the component E of 32%-36%, the F component of 1%-3%, the G component of 4%-6% and the H component of 1%-3%, the mass percent sum of each component above is 100%.
According to Nematic phase liquid crystal material of the present invention, described component A is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
According to Nematic phase liquid crystal material of the present invention, described B component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
According to Nematic phase liquid crystal material of the present invention, described component C is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
According to Nematic phase liquid crystal material of the present invention, described D component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
According to Nematic phase liquid crystal material of the present invention, described component E is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
According to Nematic phase liquid crystal material of the present invention, described F component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
According to Nematic phase liquid crystal material of the present invention, described G component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
According to Nematic phase liquid crystal material of the present invention, described H component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
The present invention adopts eight large compounds, the performance utilizing them different carries out mixture, optimum to reach mixed liquid crystal properties, wherein component A is the tolane analog derivative with wider nematic temperature range and low melting point, component E is have high birefringence rate and the high ethynyl biphenyl compound of clearing point, and these two kinds of components are main components of this formula.B component is benzene cyanides, and its cyano group contained provides larger polarity for molecule on major axis, and the component simultaneously containing naphthyl can also suppress the appearance of smectic phase.Component C is fluorine-containing pyrimidines, and D component is fluorine-containing Terphenyls compound, and they all have larger two-fold rate, for improving the degree of birefringence of mixed liquid crystal and widening the temperature range of liquid crystal.F component is bis cyclohexane compounds, in order to reduce the viscosity of liquid crystal compound.G component is isothiocyano benzene-like compounds, and its isothiocyano contained substantially increases molecular conjugation length, makes this component have the degree of birefringence of superelevation.H component is difluoroethylene compounds.
Adopt technique scheme, the invention provides a kind of Nematic phase liquid crystal material of ultra-high double refraction rate.This liquid crystal is mixture, is obtained by the multiple compound mixture with different molecular structures, has ultra-high double refraction rate, relatively low viscosity, larger dielectric anisotropy and wider use temperature scope.
Embodiment
Arbitrary feature disclosed in this specification sheets, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.Unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.Describedly be only used to help and understand the present invention, should not be considered as concrete restriction of the present invention.
Development has the focus that ultra-high double refraction rate, wide mesomorphic phase scope and low viscous liquid crystal material are liquid crystal research always.The present invention by increasing phenyl ring quantity, introduce carbon carbon triple bond, add the conjugate length that isothiocyano and cyano group can extend molecule effectively, the degree of birefringence of liquid crystal is improved significantly, in liquid crystal molecule, introduces fluorine atom or fluoro-containing group can be widened nematic temperature range, reduces fusing point and increase specific inductivity simultaneously.
Component ratio involved in following embodiment is massfraction, and temperature unit is DEG C, the concrete meaning of other symbols and test condition as follows:
T
n-Irepresent the clearing point temperature of liquid crystal, T
s-Nrepresent liquid crystal transition temperature from solid-state to nematic, DSC and polarizing microscope test;
Viscosity represents liquid crystal viscosity, the test of DV-S numeral rotational viscosimeter;
Δ n represents optical anisotropy, Δ n=n
e– n
o, wherein, n
ofor the specific refractory power of ordinary light, n
efor the specific refractory power of extraordinary ray, test condition: 20 DEG C, 589nm, Abbe refractometer is tested;
Δ ε represents dielectric anisotropy, Δ ε=ε
∥-ε
⊥, wherein, ε
∥for being parallel to the specific inductivity in molecular long axis direction, ε
⊥for the specific inductivity perpendicular to molecular long axis direction, test condition: 20 DEG C, the parallel-oriented box of 1KHz, 10.0um, accurate LCR instrument test.
Embodiment 1
By compound corresponding in table 1 and massfraction modulation nematic liquid crystal mixture, ultrasonic more than 1h ensures that component mixes.Obtained liquid crystal compound being filled with thick in box is carry out performance test in the liquid crystal cell of 10 μm.
The adding proportion of the different compound of table 1 and the performance perameter of liquid-crystal composition
Embodiment 2
By compound corresponding in table 2 and massfraction modulation nematic liquid crystal mixture, ultrasonic more than 1h ensures that component mixes.Obtained liquid crystal compound being filled with thick in box is carry out performance test in the liquid crystal cell of 10 μm.
The adding proportion of the different compound of table 2 and the performance perameter of liquid-crystal composition
Embodiment 3
By compound corresponding in table 3 and massfraction modulation nematic liquid crystal mixture, ultrasonic more than 1h ensures that component mixes.Obtained liquid crystal compound being filled with thick in box is carry out performance test in the liquid crystal cell of 10 μm.
The adding proportion of the different compound of table 3 and the performance perameter of liquid-crystal composition
Embodiment 4
By compound corresponding in table 4 and massfraction modulation nematic liquid crystal mixture, ultrasonic more than 1h ensures that component mixes.Obtained liquid crystal compound being filled with thick in box is carry out performance test in the liquid crystal cell of 10 μm.
The adding proportion of the different compound of table 4 and the performance perameter of liquid-crystal composition
Embodiment 5
By compound corresponding in table 5 and massfraction modulation nematic liquid crystal mixture, ultrasonic more than 1h ensures that component mixes.Obtained liquid crystal compound being filled with thick in box is carry out performance test in the liquid crystal cell of 10 μm.
The adding proportion of the different compound of table 5 and the performance perameter of liquid-crystal composition
Embodiment 6
By compound corresponding in table 6 and massfraction modulation nematic liquid crystal mixture, ultrasonic more than 1h ensures that component mixes.Obtained liquid crystal compound being filled with thick in box is carry out performance test in the liquid crystal cell of 10 μm.
The adding proportion of the different compound of table 6 and the performance perameter of liquid-crystal composition
Can be found out by above-described embodiment, the most high energy of liquid-crystal composition degree of birefringence of mixture reaches 0.39, general all more than 0.38, and the nematic temperature range of its liquid crystal covers-25 DEG C to 85 DEG C, temperature range is wider than 110 DEG C, all have good suitability under various circumstances, its higher dielectric anisotropy makes liquid crystal have lower threshold voltage and saturation voltage.
Certainly; the present invention can also have various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can openly make various corresponding change and distortion according to of the present invention, but these change accordingly and are out of shape the protection domain that all should belong to claim of the present invention.
Claims (9)
1. one kind has the Nematic phase liquid crystal material of ultra-high double refraction rate, it is characterized in that, the degree of birefringence of described Nematic phase liquid crystal material more than 0.38, by mass percentage, composed of the following components: 25%-35% component A, the B component of 12%-18%, the component C of 2%-8%, the D component of 5%-10%, the component E of 30%-40%, the F component of 1%-5%, the G component of 2%-8% and the H component of 1%-5%, the mass percent sum of each component above is 100%;
Wherein, the chemical formula of described A-H component is as follows:
In formula, R
1~ R
11for saturated alkyl-C
nh
2n+1, saturated alkoxyl group-OC
nh
2n+1or end is the alkyl chain-C of ethylene linkage
nh
2ncH=CH
2;
X
1, X
4~ X
7for the one in H and F; X
2for N and X
3for CH, or, X
2for CH and X
3for N;
A, B are the one in following groups:
2. Nematic phase liquid crystal material according to claim 1, is characterized in that, component A is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
3. Nematic phase liquid crystal material according to claim 1, is characterized in that, B component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
4. Nematic phase liquid crystal material according to claim 1, is characterized in that, component C is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
5. Nematic phase liquid crystal material according to claim 1, is characterized in that, D component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
6. Nematic phase liquid crystal material according to claim 1, is characterized in that, component E is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
7. Nematic phase liquid crystal material according to claim 1, is characterized in that, F component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
8. Nematic phase liquid crystal material according to claim 1, is characterized in that, G component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
9. Nematic phase liquid crystal material according to claim 1, is characterized in that, H component is the mixture that in following compound, any one or a few mixes with arbitrary proportion:
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| CN106479516A (en) * | 2016-08-31 | 2017-03-08 | 中节能万润股份有限公司 | A kind of low-voltage liquid-crystal composition and low-voltage polymer dispersion liquid crystal material |
| KR20190075994A (en) * | 2016-10-24 | 2019-07-01 | 메르크 파텐트 게엠베하 | Liquid crystal medium |
| CN108624335B (en) * | 2017-03-15 | 2020-12-18 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal material and application thereof |
| CN106978192B (en) * | 2017-04-18 | 2019-02-12 | 西安近代化学研究所 | A kind of high birefringence rate liquid crystal compound and preparation method thereof with and combinations thereof |
| KR20190140401A (en) * | 2018-06-11 | 2019-12-19 | 제이엔씨 주식회사 | Optically isotropic liquid crystal composition and optical switching device using the same |
| CN108865179B (en) * | 2018-08-17 | 2021-07-27 | 西安近代化学研究所 | Liquid crystal composition and high-frequency component comprising same |
| CN109825313A (en) * | 2019-03-06 | 2019-05-31 | 张富山 | One kind having optically anisotropic liquid-crystal composition |
| CN113667495A (en) * | 2021-08-13 | 2021-11-19 | Oppo广东移动通信有限公司 | Composition for electronic device housing, polymer dispersed liquid crystal film and preparation method thereof |
| CN113845926A (en) * | 2021-10-15 | 2021-12-28 | 苏州汉朗光电有限公司 | High-refraction liquid crystal composition and application thereof |
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Address after: South Ji'an high tech Zone 225100 Jiangsu city of Yangzhou province No. 158 Jin Rong Science Park 4 Nanlou wealth workshop Patentee after: Yangzhou Jingcai Photoelectric Technology Co., Ltd Address before: South Ji'an high tech Zone 225100 Jiangsu city of Yangzhou province No. 158 Jin Rong Science Park 4 Nanlou wealth workshop Patentee before: YANGZHOU JINGCAI INTELLIGENT GLASS TECHNOLOGY Co.,Ltd. |