CN108315019B - 一种负介电各向异性液晶组合物及其应用 - Google Patents

一种负介电各向异性液晶组合物及其应用 Download PDF

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CN108315019B
CN108315019B CN201810100743.4A CN201810100743A CN108315019B CN 108315019 B CN108315019 B CN 108315019B CN 201810100743 A CN201810100743 A CN 201810100743A CN 108315019 B CN108315019 B CN 108315019B
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liquid crystal
crystal composition
general formula
dielectric anisotropy
accounting
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CN108315019A (zh
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房凤梅
丰佩川
韩晶
史子谦
张德超
金晓雨
孙云峰
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Yantai Xianhua Technology Group Co.,Ltd.
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YANTAI XIANHUA CHEM-TECH Co Ltd
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Abstract

本发明涉及一种负介电各向异性液晶组合物。该液晶组合物包含以下质量百分比的组分：占所述液晶组合物总质量的1～50％的一种或多种通式Ⅰ的液晶化合物；占所述液晶组合物总质量的1～30％的一种或多种通式Ⅱ所示的化合物；占所述液晶组合物总质量的10～40％的一种或多种通式Ⅲ所示的液晶化合物；其中，通式Ⅰ、通式II、通式Ⅲ的结构如下。有益效果：该液晶组合物具有极大的介电各向异性绝对值，较高的清亮点，较好的稳定性及抗UV能力。

Description

一种负介电各向异性液晶组合物及其应用
技术领域
本发明涉及一种负介电各向异性液晶组合物，本发明还涉及一种该负介电各向异性液晶组合物在液晶显示器领域的应用。
背景技术
液晶发现于一个世纪以前，但在近几十年来其应用研究得到迅猛发展。液晶分子结构的各向异性决定液晶性质各向异性。液晶显示器通常是利用液晶材料的光学各向异性和介电各向异性的特性来实现显示功能。根据介电各向异性的正负，可将液晶分为正介电各向异性液晶和负介电各向异性液晶。负介电各向异性的液晶应用非常广泛，成为目前研究热点之一。但除了需要考虑液晶化合物的负介电各向异性之外，清亮点、稳定性以及抗UV能力亦是液晶性质的重要性质。综上，有必要提出一种液晶组合物，以解决实际应用所需的极大的介电各向异性绝对值，较高的清亮点，较好的稳定性及抗UV能力的性能的问题。
发明内容
本发明针对上述现有技术的不足，提供一种具有极大的介电各向异性绝对值，较高的清亮点，较好的稳定性及抗UV能力的负介电各向异性液晶组合物。
本发明解决上述技术问题的技术方案如下：
一种负介电各向异性液晶组合物，所述液晶组合物包含：
占所述液晶组合物总质量的1～50％的一种或多种通式Ⅰ所示的液晶化合物；
Figure BDA0001566249690000021
占所述液晶组合物总质量的10～50％的一种或多种通式Ⅱ所示的化合物；
Figure BDA0001566249690000022
占所述液晶组合物总质量的1～15％的一种或多种通式Ⅲ所示的液晶化合物；
Figure BDA0001566249690000023
其中，R1、R2、R3、R4、R5、R6分别独立的表示氢原子、碳原子数为1-7的烷基、碳原子数为1-6的烷氧基或碳原子数为2-6的链烯基；
Figure BDA0001566249690000024
各自独立的表示
Figure BDA0001566249690000025
Figure BDA0001566249690000026
Figure BDA0001566249690000027
表示
Figure BDA0001566249690000028
m，n，o各自独立的表示0或1；
Z1、Z2各自独立的表示单键、-CH2O-、-CH2CH2-或-CH＝CH-；
Z3、Z4、Z5各自独立的表示单键、-C≡C-、-CH2O-、-CH2CH2-或-COO-；
p,r,s各自独立的表示1或2；q表示为0或1，且p+q≤2。
进一步的，所述通式Ⅰ的结构选自如下化合物：
Figure BDA0001566249690000029
Figure BDA0001566249690000031
进一步的，所述通式Ⅱ的结构选自如下化合物：
Figure BDA0001566249690000032
Figure BDA0001566249690000041
进一步的，所述通式Ⅲ的结构选自如下化合物：
Figure BDA0001566249690000042
进一步的，所述R1、R2相同或不同，各自独立的表示碳原子数为2-5的烷基或烷氧基。
进一步的，所述R3、R4相同或不同，各自独立的表示碳原子数为2-5的烷基或烷氧基。
进一步的，所述液晶组合物包含：
占所述液晶组合物总质量的10～40％的一种或多种具有通式Ⅰ所示的液晶化合物；
占所述液晶组合物总质量的30～50％的一种或多种具有通式Ⅱ所示的液晶化合物；
占所述液晶组合物总质量的10～40％的一种或多种具有通式Ⅲ的液晶化合物。
本发明还提供一种电光学液晶显示器，包括上述中任一项所述的液晶组合物。
本发明还提供一种如上述中任一项所述的液晶组合物在液晶显示领域的应用。
有益效果：
本发明液晶组合物具有极大的介电各向异性绝对值，较高的清亮点，较好的稳定性及抗UV能力。
具体实施方式
以下将结合具体实施方案来说明本发明。需要说明的是，下面的实施例为本发明的示例，仅用来说明本发明，而不用来限制本发明。在不偏离本发明主旨或范围的情况下，可进行本发明构思内的其他组合和各种改良。
本发明的液晶组合物采用常规方法将两种或多种液晶化合物混合进行生产，如在高温下混合不同组分并彼此溶解的方法制备，其中，将液晶组合物溶解在用于该化合物的溶剂中并混合，然后在减压下蒸馏出该溶剂；或者本发明的液晶组合物可按照常规的方法制备，如将其中含量较小的组分在较高的温度下溶解在含量较大的主要组分中，或将各所属组分在有机溶剂中溶解，如丙酮、氯仿或甲醇等，然后将溶液混合后去除溶剂后得到。
本发明中的百分比为重量百分比，温度为摄氏度(℃)。如无其他说明，其他符号的具体意义及测试条件如下：
Cp(℃)表示液晶的清亮点。
△n为光学各向异性，测试条件为，589nm波长，25℃。测量仪器：阿贝折射仪。
△ε为介电各向异性，△ε＝ε∥-ε⊥，其中，ε∥为平行于分子轴的介电常数，ε⊥为垂直于分子轴的介电常数。
η：流动粘度(mPa·s)。
Vth：阈值电压(V)，测试条件为，TN90型7微米测试盒，常白模式。
本发明实施例中的液晶组合物采用业内普遍使用的热溶解或震荡混合方法，首先用天平按重量百分比称量液晶化合物，其中称量加入顺序无特定要求，通常以液晶化合物熔点由高到低的顺序依次称量混合，在60℃恒温下加热搅拌或在震荡机中震荡使得各组分熔解均匀，再经吸附、微滤膜微滤、最后封装即得目标样品。
在以下的实施例中所采用的各成分，均可以通过公知的方法进行合成，或者通过商业途径获得。这些合成技术是常规的，所得到各液晶化合物经测试符合电子类化合物标准。
为便于表达，以下各实施例中，液晶化合物的基团结构用表1所列的代码表示：
表1液晶化合物的基团结构代码
Figure BDA0001566249690000061
以下列结构式为例，该结构式对应于表1所列代码可表示为3H(CN)1OB(2F,3F)O2，代码中3表示烷基的C数，即表示烷基为-C3H7。因此该液晶化合物的代码为3H(CN)1OB(2F,3F)O2(实施例1中Ⅰ-1所列化合物)。其余各表中所列液晶化合物结构按表1代码类推。
Figure BDA0001566249690000071
实施例1
Figure BDA0001566249690000072
实施例2
Figure BDA0001566249690000073
Figure BDA0001566249690000081
实施例3
Figure BDA0001566249690000091
实施例4
Figure BDA0001566249690000092
Figure BDA0001566249690000101
实施例5
Figure BDA0001566249690000102
Figure BDA0001566249690000111
通过上述实施例1-实施例5可得出，本发明液晶组合物具有极大的介电各向异性绝对值，较高的清亮点，较好的稳定性及抗UV能力。
本发明所述的液晶组合物可应用于VA模式、MVA模式、PSVA模式、IPS模式、或ECB显示模式的液晶显示元件。
本发明可用其他的不违背本发明的精神或主要特征的具体形式来概述。因此，无论从哪一点来看，本发明的上述实施方案都只能认为是对本发明的说明而不能限制本发明，权利要求书指出了本发明的范围，而上述的说明并未指出本发明的范围，因此，在与本发明的权利要求书相当的含义和范围内的任何改变，都应认为是包括在本发明的权利要求书的范围内。

Claims (7)

1.一种负介电各向异性液晶组合物，其特征在于，所述液晶组合物包含：
占所述液晶组合物总质量的10~40%的一种或多种通式Ⅰ所示的液晶化合物；所述通式Ⅰ的结构选自如下化合物：
Figure DEST_PATH_IMAGE001
　　　　　　　　 　　 Ⅰ-7
Figure DEST_PATH_IMAGE002
　　　　　　　 　 Ⅰ-8
Figure DEST_PATH_IMAGE003
　　　　　 　 　Ⅰ-9
Figure DEST_PATH_IMAGE004
　　　　　　　 　 　　Ⅰ-10
Figure DEST_PATH_IMAGE005
　　　　　 　　 Ⅰ-11
Figure DEST_PATH_IMAGE006
　 Ⅰ-12
占所述液晶组合物总质量的30~50%的一种或多种通式Ⅱ所示的化合物；
Figure DEST_PATH_IMAGE007
Figure DEST_PATH_IMAGE008
占所述液晶组合物总质量的10~15%的一种或多种通式Ⅲ所示的液晶化合物；
其中，R1、R2、R3、R4、R5、R6分别独立的表示氢原子、碳原子数为1-7的烷基、碳原子数为1-6的烷氧基或碳原子数为2-6的链烯基；
Figure DEST_PATH_IMAGE009
、
Figure DEST_PATH_IMAGE010
、
Figure DEST_PATH_IMAGE011
各自独立的表示
Figure DEST_PATH_IMAGE012
、
Figure DEST_PATH_IMAGE013
、
Figure DEST_PATH_IMAGE014
、、、
Figure DEST_PATH_IMAGE017
或
Figure DEST_PATH_IMAGE018
；
Figure DEST_PATH_IMAGE019
表示
Figure DEST_PATH_IMAGE020
或
Figure DEST_PATH_IMAGE021
；
Z3、Z4、Z5各自独立的表示单键、-C≡C-、-CH2O-、-CH2CH2-或-COO-；
p,r,s各自独立的表示1或2；q表示为0或1，且p+q≤2。
2.根据权利要求1所述的液晶组合物，其特征在于，所述通式Ⅱ的结构选自如下化合物：
Figure DEST_PATH_IMAGE022
Ⅱ-1
Figure DEST_PATH_IMAGE023
Ⅱ-2
Ⅱ-3
Ⅱ-4
Figure DEST_PATH_IMAGE026
Ⅱ-5
Ⅱ-6
Figure DEST_PATH_DEST_PATH_IMAGE056
Ⅱ-7
Figure DEST_PATH_DEST_PATH_IMAGE058
Ⅱ-8
Figure DEST_PATH_DEST_PATH_IMAGE060
Ⅱ-9
Ⅱ-10
Figure DEST_PATH_DEST_PATH_IMAGE064
Ⅱ-11
Ⅱ-12
Ⅱ-13。
3.根据权利要求1所述的液晶组合物，其特征在于，所述通式Ⅲ的结构选自如下化合物：
Figure DEST_PATH_DEST_PATH_IMAGE070
Ⅲ-1
Figure DEST_PATH_DEST_PATH_IMAGE072
Ⅲ-2
Figure DEST_PATH_DEST_PATH_IMAGE074
Ⅲ-3
Figure DEST_PATH_DEST_PATH_IMAGE076
Ⅲ-4。
4.根据权利要求2所述的液晶组合物，其特征在于，所述R1、R2相同或不同，各自独立的表示碳原子数为2-5的烷基或烷氧基。
5.根据权利要求3所述的液晶组合物，其特征在于，所述R3、R4相同或不同，各自独立的表示碳原子数为2-5的烷基或烷氧基。
6.一种电光学液晶显示器，其特征在于，包括如权利要求5所述的液晶组合物。
7.一种如权利要求5所述的液晶组合物在液晶显示领域的应用。
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