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Preparation method of double-layer cholesteric liquid crystal physical and chemical gel composite structure

A technology of cholesteric liquid crystal and composite structure, which is applied in the field of preparation of double-layer cholesteric liquid crystal physical and chemical gel composite structure, and can solve the problem of not having dynamic response characteristics

Inactive Publication Date: 2019-12-06
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, people's requirements for materials continue to increase. PSLC films are subject to many limitations in application because of the reflection bands that have been fixed after polymerization and do not have dynamic response characteristics.

Method used

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  • Preparation method of double-layer cholesteric liquid crystal physical and chemical gel composite structure
  • Preparation method of double-layer cholesteric liquid crystal physical and chemical gel composite structure
  • Preparation method of double-layer cholesteric liquid crystal physical and chemical gel composite structure

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Embodiment 1

[0028] figure 2 It is a schematic diagram of the device structure of the double-layer cholesteric liquid crystal physical and chemical gel composite structure reflective film provided in the first embodiment of the present invention. It includes a first substrate layer 21, a first conductive layer 22, a first alignment layer 23, a liquid crystal chemical gel layer 24, a liquid crystal physical gel layer 25, a second alignment layer 26, a second conductive layer 27 and a second substrate layer 28.

[0029] A method for preparing a double-layer cholesteric liquid crystal physical and chemical gel composite structure, including:

[0030] Step (1), uniformly mix the reactive liquid crystal monomer, liquid crystal material, initiator and chiral agent, and further, mix the reactive liquid crystal monomer and liquid crystal material according to the mass ratio of 1: (10~1), and then add the initiator The agent and the chiral agent are mixed uniformly and form a mixture. Among the...

Embodiment 2

[0044] image 3 It is a schematic diagram of the device structure of a cholesteric liquid crystal double-layer cholesteric liquid crystal physical and chemical gel composite structure reflective film provided in the second embodiment of the present invention. The differences between Example 2 and Example 1 in making the liquid crystal cell are: the polymerizable monomers, polymerization initiators, and polymerization conditions for the first filling are different, the physical gel factors for the second filling are different, and the second filling The ratio of cholesteric liquid crystal is different, as follows:

[0045] The UV light polymerizable monomer for the second filling is C6M (2-Methyl-1,4-phenylene bis(4-((6-(acryloyloxy)hexyl)oxy)benzoate)), the initiator is Irgacure 784, and the polymerization conditions Under 420nm blue light at 15mW / cm 2 intensity, direct the first substrate layer to irradiate for 15 minutes. The physical gel factor of the second filling is L...

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Abstract

The invention discloses a preparation method of a double-layer cholesteric liquid crystal physical and chemical gel composite structure. The method comprises the following steps: carrying out immersion cleaning-refilling on a PSLC film prepared from liquid crystal chemical gel; and after removing liquid crystals and unreacted polymerizable monomers in the PSLC film through immersion cleaning, refilling cholesteric liquid crystal physical gel, thereby realizing a double-layer gel system which is different in liquid crystal structure and does not interfere with each other. The composite system has a multi-stable characteristic, and multi-stable control of the composite structure can be implemented through temperature and voltage.

Description

technical field [0001] The invention relates to the technical field of liquid crystals, in particular to a method for preparing a physical and chemical gel composite structure of double-layer cholesteric liquid crystals. Background technique [0002] Cholesteric liquid crystal is a liquid crystal with helical structure, which is a special form of nematic liquid crystal. Please check figure 1 , the arrangement of the cholesteric liquid crystal molecules is a helical arrangement, and the helical progression is periodic along the optical axis, and the length of each helical structure is called the helical pitch P. The Bragg reflection characteristic of the cholesteric liquid crystal makes the incident light on the surface of the cholesteric liquid crystal match the helical pitch of the liquid crystal, and it can selectively reflect the light of this wavelength band. At the same time, the alignment state of liquid crystal molecules is easily affected by electric and magnetic f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/137G02F1/139G02F1/1341
CPCG02F1/1341G02F1/13718G02F1/1391G02F1/13775
Inventor 陈鹭剑徐彦超李森森江荣国
Owner XIAMEN UNIV