CN104152151B - A kind of liquid-crystal composition with smectic phase - Google Patents
A kind of liquid-crystal composition with smectic phase Download PDFInfo
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- CN104152151B CN104152151B CN201410352848.0A CN201410352848A CN104152151B CN 104152151 B CN104152151 B CN 104152151B CN 201410352848 A CN201410352848 A CN 201410352848A CN 104152151 B CN104152151 B CN 104152151B
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Abstract
The invention discloses a kind of liquid-crystal composition with smectic phase, this liquid-crystal composition comprises the first component, the second component and the 3rd component; Wherein the first component is compound shown in formula I, and the second component is compound shown in formula II, the 3rd component comprise in the mixture of compound shown in formula III, formula IV and formula V one or more.The liquid-crystal composition clearing point that the present invention prepares is high, and raw material is easy to get, with low cost, stable performance.
Description
Technical field
The invention belongs to liquid crystal material field, be specifically related to a kind of liquid-crystal composition with smectic phase, be applied to liquid crystal device.
Background technology
Save energy has become society theme, and energy-saving material demand is also in continuous rising, and liquid crystal material, due to its good photoelectric properties, possesses wide development space in energy-saving material field.Liquid crystal material has liquid fluidity and solid order feature simultaneously, and liquid crystal can be divided into nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal by arrangement mode classification.Wherein, it is orderly that smectic liquid crystal possesses interlayer, constitutional features unordered in layer, this characteristics determined smectic liquid crystal satisfactory stability performance, smectic liquid crystal can be made to realize scattering states by outfields such as electric fields or through state, and this state still can keep after removing outfield, outfield is not namely needed to continue input.Therefore, smectic liquid crystal is used for the fields such as display material, utilizes smectic liquid crystal that this feature of a certain state can be kept to save mass energy.
In actual applications, be mostly, by mixture small molecule liquid crystal, to obtain the liquid crystal material of various aspects of performance excellence, as possessed the liquid crystal compound of the features such as large dielectric coefficient, high birefringence rate, low-viscosity, high clearing point.But so far plurality of liquid crystals compounding method still rafferty can follow.
Summary of the invention
The object of this invention is to provide a kind of liquid-crystal composition with smectic phase, it is low that this kind of liquid-crystal composition possesses system cost, the feature that clearing point is high.Method of the present invention adopts benzene cyanogen class liquid crystal mixture, and then prepare the liquid-crystal composition with smectic phase.
Described liquid-crystal composition comprises the second component, and described liquid-crystal composition also comprises the first component or the 3rd component, or its mixture;
The first described component is one or more in compound shown in formula I, wherein, and R
1it is the alkyl containing 8 ~ 12 carbon atoms;
The second described component is one or more in compound shown in formula II, wherein, and R
2it is the alkyl containing 8 ~ 16 carbon atoms.
The 3rd described component comprises one or more in compound shown in formula III, formula IV and formula V, and wherein, X is phenyl or cyclohexyl, and Y is cyano group or the alkoxyl group comprising 1 ~ 6 carbon atom, R
3, R
4, R
6be independently the alkyl containing 1 ~ 6 carbon atom, R
5for the alkyl containing 7 ~ 12 carbon atoms, R
7for the alkyl containing 1 ~ 6 carbon atom or hydrogen atom;
Preferably, described liquid-crystal composition comprises the first component by mass percentage: 0% ~ 80%, the second component: 20% ~ 80%, the 3rd component: 0% ~ 30%.
Preferably, described liquid-crystal composition comprises compound shown in contained I, formula II, formula III, formula IV and formula V, wherein, and R
1the alkyl containing 8 ~ 12 carbon atoms, R
2be the alkyl containing 8 ~ 16 carbon atoms, X is phenyl or cyclohexyl, and Y is cyano group or the alkoxyl group comprising 1 ~ 6 carbon atom, R
3, R
4, R
6be independently the alkyl containing 1 ~ 6 carbon atom, R
5for the alkyl containing 7 ~ 12 carbon atoms, R
7for the alkyl containing 1 ~ 6 carbon atom or hydrogen atom.
Preferred, compound quality mark shown in formula I is 59% ~ 62%, and compound quality mark shown in formula II is 24% ~ 26%, and compound shown in formula III is 5% ~ 6%, compound shown in formula IV is 2% ~ 3%, and compound quality mark shown in formula V is 5% ~ 6%.
The invention discloses a kind of liquid-crystal composition with smectic phase, this liquid-crystal composition possess that raw material is easy to get, the advantage of with low cost, high clearing point and stable performance, significant for the industrialization of liquid crystal energy saving device.The present invention utilizes liquid crystal material characteristic, has selected different structure liquid crystal material to carry out mixture, greatly reduces liquid crystal energy saving device material cost, has promoted industrialization process, have extremely important meaning.
Embodiment
Below in embodiment involved symbolic significance and test condition as follows:
The crystallinity that represents S → SmA arrives smectic C phase transition temperature;
SmA → N represents that smectic C arrives nematic phase phase transition temperature;
ClearingPoint represents clearing point;
Viscosity represents viscosity, and use viscometer test, test condition is 20 DEG C;
Δ n represents optical anisotropy, Δ n=n
o-n
e, wherein, n
ofor ordinary refraction index, n
efor extraordinary ray specific refractory power, use Abbe refractometer test, test condition is 589nm, 20 DEG C;
Δ ε represents dielectric anisotropy, Δ ε=ε
∥-ε
⊥, wherein, ε
∥for being parallel to the specific inductivity of molecular axis, ε
⊥for the specific inductivity perpendicular to molecular axis, use HP4284A test, test condition 25 DEG C, 100hz;
V
10,25represent threshold voltage, test condition 25 DEG C;
V
90,25represent saturation voltage, test condition 25 DEG C.
Embodiment 1
By the compound in table 1 and massfraction configuration liquid-crystal composition, and performance test is carried out to gained smectic liquid crystal composition.
The component proportioning of the smectic liquid crystal composition of table 1, embodiment 1
Above-mentioned liquid crystal combination physical performance is as shown in table 2.
Table 2 embodiment 1 liquid crystal combination physical performance
Embodiment 2
By the compound in table 3 and massfraction configuration liquid-crystal composition, and performance test is carried out to gained smectic liquid crystal composition.
The component proportioning of the smectic liquid crystal composition of table 3 embodiment 2
Above-mentioned liquid crystal combination physical performance is as shown in table 4.
Table 4 embodiment 2 liquid crystal combination physical performance
Embodiment 3
By the compound in table 5 and massfraction configuration liquid-crystal composition, and performance test is carried out to gained smectic liquid crystal composition.
The component proportioning of the smectic liquid crystal composition of table 5 embodiment 3
Above-mentioned liquid crystal combination physical performance is as shown in table 6.
Table 6 embodiment 3 liquid crystal combination physical performance
Claims (1)
1. have a liquid-crystal composition for smectic phase, it is characterized in that, described liquid-crystal composition comprises second component, and described liquid-crystal composition also comprises three components, or the mixture of the first component and three components;
The first described component is one or more in compound shown in formula I, wherein, and R
1it is the alkyl containing 8 ~ 12 carbon atoms;
Described second component is compound shown in formula II, wherein, and R
2it is the alkyl containing 8 ~ 16 carbon atoms;
Described three components comprises one or more in compound shown in formula III, formula IV and formula V, and wherein, X is phenyl or cyclohexyl, and Y is cyano group or the alkoxyl group comprising 1 ~ 6 carbon atom, R
3, R
4, R
6be independently the alkyl containing 1 ~ 6 carbon atom, R
5for the alkyl containing 7 ~ 12 carbon atoms, R
7for the alkyl containing 1 ~ 6 carbon atom or hydrogen atom;
compound shown in III is 5% ~ 6%, and compound shown in formula IV is 2% ~ 3%, and compound quality mark shown in formula V is 5% ~ 6%.
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| CN104152151A CN104152151A (en) | 2014-11-19 |
| CN104152151B true CN104152151B (en) | 2015-12-02 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105129A (en) * | 1986-06-23 | 1988-07-27 | 大不列颠及北爱尔兰联合王国国防大臣 | Chiral liquid crystal compound: mixture and the device that such mixture is housed |
| CN1141329A (en) * | 1995-05-19 | 1997-01-29 | 大日本印刷株式会社 | Disc-like liquid crystal composition for recording display medium, recording displaying medium and method for using same |
| CN1227838A (en) * | 1997-11-28 | 1999-09-08 | 大日本油墨化学工业株式会社 | Fluoro 4-alkene-benzoic acid and its derivative, nematic liquid crystal composition and liquid crystal display using this composition |
| CN102959049A (en) * | 2010-03-15 | 2013-03-06 | 剑桥企业有限公司 | Liquid crystal formulations and structures for smectic a optical devices |
| CN103184053A (en) * | 2011-12-29 | 2013-07-03 | 苏州汉朗光电有限公司 | High scattering state smectic phase liquid crystal materials and display devices thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201100375D0 (en) * | 2011-01-10 | 2011-02-23 | Cambridge Entpr Ltd | Smectic A compositions for use in electrical devices |
-
2014
- 2014-07-23 CN CN201410352848.0A patent/CN104152151B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105129A (en) * | 1986-06-23 | 1988-07-27 | 大不列颠及北爱尔兰联合王国国防大臣 | Chiral liquid crystal compound: mixture and the device that such mixture is housed |
| CN1141329A (en) * | 1995-05-19 | 1997-01-29 | 大日本印刷株式会社 | Disc-like liquid crystal composition for recording display medium, recording displaying medium and method for using same |
| CN1227838A (en) * | 1997-11-28 | 1999-09-08 | 大日本油墨化学工业株式会社 | Fluoro 4-alkene-benzoic acid and its derivative, nematic liquid crystal composition and liquid crystal display using this composition |
| CN102959049A (en) * | 2010-03-15 | 2013-03-06 | 剑桥企业有限公司 | Liquid crystal formulations and structures for smectic a optical devices |
| CN103184053A (en) * | 2011-12-29 | 2013-07-03 | 苏州汉朗光电有限公司 | High scattering state smectic phase liquid crystal materials and display devices thereof |
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