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

Multi-reflection-band layered cholesteric liquid crystal composite film with light response character and process

A technology of cholesteric liquid crystal and composite film, which can be used in optics, nonlinear optics, instruments, etc., and can solve problems such as limited applications

Active Publication Date: 2014-03-26
UNIV OF SCI & TECH BEIJING
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this greatly limits its application

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
  • Multi-reflection-band layered cholesteric liquid crystal composite film with light response character and process
  • Multi-reflection-band layered cholesteric liquid crystal composite film with light response character and process
  • Multi-reflection-band layered cholesteric liquid crystal composite film with light response character and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The composition and chirality of the layered cholesteric liquid crystal of the film are respectively (both percentages):

[0027] Layer I: SLC1717 / C6M / S811 / Irg651=54.0 / 30.0 / 15.0 / 1.0, left-handed;

[0028] Layer II: SLC1717 / CD1=94.0 / 6.0, right-handed;

[0029] Layer III: SLC1717 / C6M / S811 / Irg651=54.0 / 30.0 / 15.0 / 1.0, left-handed.

[0030] SLC1717 is a small molecule N mixed crystal (n o = 1.519, n e = 1.720, Δn = n e -n o = 0.201, T N-I =92 o C), the structures of C6M, S811, Irg651 and CD1 are shown in Table 1.

[0031] The selective reflection wavelength of the cholesteric liquid crystal prepared in layer II can be changed under the irradiation of light, figure 2 This property is briefly described. The composition (mass ratio) of the cholesteric liquid crystal configured here is SLC1717 / CD1=95.0 / 5.0, it can be found that the cholesteric liquid crystal is at 2 mW / cm 2 , under the irradiation of 365 nm ultraviolet light, its reflection wavelength can be red-sh...

Embodiment 2

[0046] The composition and chirality of the layered cholesteric liquid crystal of the film are respectively (both percentages):

[0047] Layer I: SLC1717 / C6M / S811 / Irg651=54.0 / 30.0 / 15.0 / 1.0, left-handed;

[0048]Layer II: SLC1717 / CD1=94.0 / 6.0, right-handed;

[0049] Layer III: SLC1717 / C6M / R811 / Irg651=59.0 / 30.0 / 10.0 / 1.0, right-handed.

[0050] The sample preparation process is as in Example 1.

[0051] Then the film made has the following characteristics (such as Figure 4 shown):

[0052] (1) Initially, the film has two distinct reflection bands, one at 700 nm and one at 1020 nm, which are the reflection bands of layer I and layer III respectively; while the reflection band of layer II is calculated according to the helical twisting force of CD1 It can be seen that at 455 nm, the reflection band is covered by the absorption of CD1;

[0053] (2) at 1 mW / cm 2 Under the irradiation of 365 nm, after 130 s, the reflection band of layer II coincides with the reflection band of ...

Embodiment 3

[0060] The composition and chirality of the layered cholesteric liquid crystal of the film are respectively (both percentages):

[0061] Layer I: SLC1717 / C6M / S811 / Irg651=54.0 / 30.0 / 15.0 / 1.0, left-handed;

[0062] Layer II: SLC1717 / CD1=94.0 / 6.0, right-handed;

[0063] Layer III: SLC1717 / C6M / S811 / Irg651=59.0 / 30.0 / 10.0 / 1.0, left-handed.

[0064] The sample preparation process is as in Example 1.

[0065] Then the film made has the following characteristics (such as Figure 5 shown):

[0066] (1) Initially, the film has two distinct reflection bands, one at 700 nm and one at 1020 nm, which are the reflection bands of layer I and layer III respectively; while the reflection band of layer II is calculated according to the helical twisting force of CD1 It can be seen that at 455 nm, the reflection band is covered by the absorption of CD1;

[0067] (2) with 1 mW / cm 2 After irradiating at 365 nm for 100 s and 220 s, the reflection bands of layer II coincide with those of layer I a...

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 multi-reflection-band layered cholesteric liquid crystal composite film with the light response character and a process, and relates to an optical material capable of carrying out light control. The multi-reflection-band layered cholesteric liquid crystal composite film is formed by three layers of cholesteric liquid crystals in an overlaid mode, light with three wave bands can be reflected at most, and the wavelength of the light can at least range from 400nm to 2000nm. Reflection wave crests of one layer of cholesteric liquid crystal can move under irradiation of the light with the specific wavelength, and when the layer of cholesteric liquid crystal and reflection bands of the other two layers of cholesteric liquid crystals interact, the multi-reflection-band layered cholesteric liquid crystal composite film can have different optical effects. After a certain period of irradiation time, the light with a certain wave band can be totally reflected, total reflection can be disappeared through continuous irradiation, and conversion between different reflection states can be accurately controlled through the light with the specific wavelength. In addition, the initial state of the multi-reflection-band layered cholesteric liquid crystal composite film can be restored under the effect of the light or heat.

Description

[0001] technical field [0002] The invention belongs to the technical field of liquid crystal application, and provides a multi-reflection band layered cholesteric phase liquid crystal film and a process with photoresponse characteristics. Background technique [0003] Liquid crystal is an intermediate phase between crystal and liquid. In a certain temperature range or in a suitable solvent, it has the fluidity of liquid and the optical birefringence of crystal at the same time. The discovery of liquid crystal materials has been more than a hundred years so far. Although our research on liquid crystal theory is not very deep, the application of liquid crystal materials, especially in the field of flat panel display, has developed by leaps and bounds in the past half a century. . At present, liquid crystal devices are continuously providing new application values ​​for human beings in various fields with their excellent quality. [0004] Cholesteric liquid crystals are a t...

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 Applications(China)
IPC IPC(8): G02F1/1337G02F1/137G02F1/1333
Inventor 杨槐陈刚王丽萍王玲宋平陈兴武沈文波于美娜
Owner UNIV OF SCI & TECH BEIJING
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