Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A liquid crystal composition with smectic phase to chiral nematic phase transition

A technology of liquid crystal composition and chiral nematic phase, applied in liquid crystal materials, chemical instruments and methods, etc., to achieve the effects of stable performance, adjustable transition temperature and cost reduction

Active Publication Date: 2015-10-07
PEKING UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, various liquid crystal mixing methods still have no rules to follow, and a large number of experiments are needed to study the formula in order to obtain the target performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A liquid crystal composition with smectic phase to chiral nematic phase transition
  • A liquid crystal composition with smectic phase to chiral nematic phase transition
  • A liquid crystal composition with smectic phase to chiral nematic phase transition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The liquid crystal composition was configured according to the compounds and parts by mass in Table 1, and the obtained smectic phase to chiral nematic phase transition liquid crystal composition was filled between the two substrates of the liquid crystal display for performance testing.

[0037] Table 1 Component distribution ratio of the smectic phase to chiral nematic phase liquid crystal composition in Example 1

[0038]

[0039]

[0040] The properties of the above liquid crystal composition are shown in Table 2.

[0041] Performance of the liquid crystal composition in Table 2 Example 1

[0042]

[0043]

Embodiment 2

[0045] The liquid crystal composition was configured according to the compounds and parts by mass in Table 3, and the obtained smectic phase to chiral nematic phase transition liquid crystal composition was filled between the two substrates of the liquid crystal display for performance testing.

[0046] Table 3 Component distribution ratio of the smectic phase to chiral nematic phase liquid crystal composition in Example 2

[0047]

[0048]

[0049]

[0050] The properties of the above liquid crystal composition are shown in Table 4.

[0051] Performance of the liquid crystal composition in Table 4 Example 2

[0052]

[0053]

Embodiment 3

[0055] Prepare liquid crystal mixture a and liquid crystal mixture b according to the types and mass fractions of compounds shown in Table 5 and Table 6; mix liquid crystal mixture a and liquid crystal mixture b uniformly in different proportions, and fill them between the two substrates of the liquid crystal display for performance testing. Table 7 shows the phase transition temperature and birefringence index of liquid crystal mixture a and liquid crystal mixture b mixed in different proportions.

[0056] Table 5 The component distribution ratio of the liquid crystal mixture a of Example 3

[0057]

[0058]

[0059] Table 6 The component distribution ratio of the liquid crystal mixture b of Example 3

[0060]

[0061] Table 7 Phase transition temperature after mixing liquid crystal mixture a and b in different proportions in Example 3

[0062]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a liquid crystal composition capable of transition from a smectic phase to a chiral nematic phase. According to the invention, a biphenyl nitrile liquid crystal compound is used along with a suitable diphenylacetylene liquid crystal compound and a fluorine-containing liquid crystal compound and a suitable chiral compound is added, so as to obtain the excellent-performance liquid crystal composition capable of transition from a smectic phase to a chiral nematic phase. The liquid crystal composition has advantages of adjustable transition temperature, easily available raw material, low cost and stable performance, and is of great significance for industrialization of an intelligent temperature-control energy-saving liquid crystal thin film material. By the utilization of characteristics of liquid crystal materials, different structured liquid crystal materials are selected for mixing. Costs of intelligent temperature-control thin film raw materials are greatly reduced, and the process of industrialization is promoted. The liquid crystal composition provided by the invention is of great significance.

Description

technical field [0001] The invention belongs to the field of liquid crystal materials, and in particular relates to a liquid crystal composition with smectic phase to chiral nematic phase transition, which is applied to temperature-sensitive control liquid crystal devices. Background technique [0002] Energy saving has become the theme of today's society, and the demand for intelligent energy-saving materials is also rising. Due to its good optical properties, liquid crystal materials have broad development space in the field of intelligent energy-saving materials. Liquid crystal materials have different molecular arrangement characteristics in each phase state: smectic phase liquid crystal is a kind of interlayer ordered and intralayer disordered structure; nematic phase liquid crystal has a lower degree of order than smectic phase, and its molecular long axes are mutually Parallel to each other; cholesteric liquid crystal is actually a distorted state of nematic phase, so...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/46
Inventor 杨槐郭姝萌张兰英王慧慧沈文波
Owner PEKING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com