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An electronically controlled liquid crystal dimming film with low driving voltage

A liquid crystal dimming film and electronic control technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of difficult flexible large-area processing, poor flexibility, low tear strength, etc., to reduce anchoring effect and response speed Fast, excellent mechanical properties

Active Publication Date: 2020-09-01
苏州英荟虹彩薄膜材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with PDLC, the polymer matrix content of PSLC is less than 10%, so the tear strength between the two base films is lower, the flexibility is poor, and it is difficult to perform flexible large-area processing

Method used

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  • An electronically controlled liquid crystal dimming film with low driving voltage
  • An electronically controlled liquid crystal dimming film with low driving voltage
  • An electronically controlled liquid crystal dimming film with low driving voltage

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] 2. The preparation method of the liquid crystal dimming film provided by the invention comprises the following steps:

[0048] (1) Mix the liquid crystal material, epoxy monomer, epoxy curing agent, accelerator, liquid crystal UV light polymerizable monomer, initiator and spacer particles uniformly according to the required ratio, and place the formed isotropic liquid material A thin film is formed between a conductive film coated with indium tin oxide (ITO).

[0049] (2) Thermally polymerize the film, initiate the cross-linking reaction of epoxy monomer and epoxy curing agent through thermal polymerization to form a polymer matrix, form a microphase separation with liquid crystal photopolymerizable monomer and liquid crystal, and obtain a conductive film . The specific conditions of the thermal polymerization are as follows: within the range of room temperature to 100° C., the polymerization reaction takes 1 to 24 hours.

[0050] (3) Applying an electric field to the...

Embodiment

[0054] 1. Material description:

[0055] (1) The cholesteric liquid crystal material used in this embodiment is obtained by adding a chiral additive S811 to the nematic liquid crystal E8. Wherein, the mass ratio of E8 and S811 is 97:3; the preparation method is as follows: mix E8 and S811 and stir well. The molecular structure and content of each component of the nematic liquid crystal E8 are shown in Table 1.

[0056] Table 1 Molecular structure and content comparison table of each component of liquid crystal material E8

[0057]

[0058]

[0059] (2) The molecular structures of the materials involved in this embodiment are shown in Table 2.

[0060] Molecular structure comparison table of each material used in Table 2

[0061]

[0062] 2. Prepare the liquid crystal dimming films required by the two groups, and set up a control group at the same time. The materials required for each group are shown in Table 3.

[0063] Table 3 formula ratio table of each group

...

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Abstract

The invention belongs to the field of liquid crystal materials, and concretely relates to an electronically controlled liquid crystal dimming film with a low driving voltage. The electronically controlled liquid crystal dimming film comprises, by mass, 25.0-60.0% of a liquid crystal material, 1.0-10.0% of a liquid-crystal ultraviolet-polymerizable monomer, an initiator accounting for 0.1-5.0% of the total mass of the liquid crystal ultraviolet-polymerizable monomer and the liquid crystal material, 20.0-30.0% of an epoxy monomer, 20.0-30.0% of an epoxy curing agent, a heat curing accelerator accounting for 1.0-10.0% of the total mass of the epoxy monomer and the epoxy curing agent, and 0.1-5.0% of spacer particles. The liquid crystal dimming film obtained in the present invention has excellent electrooptic characteristics and a good flexibility.

Description

technical field [0001] The invention belongs to the field of liquid crystal materials, and in particular relates to an electrically controlled liquid crystal dimming film with low driving voltage. Background technique [0002] The anisotropic structure and characteristics of liquid crystals make it of far-reaching research significance in basic theoretical research and application device development. Among them, the research and development of functional liquid crystal materials is a hot topic. Among the new functional liquid crystal materials, polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal, referred to as PDLC) and polymer stabilized liquid crystal (Polymer Stabilized Liquid Crystal, referred to as PSLC) both show good application characteristics. [0003] In the PDLC film, the liquid crystal is uniformly dispersed in the polymer matrix in the form of droplets. In the absence of an electric field, the directors of the liquid crystal molecules are distri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L29/10C08K5/10C08K5/315C08J5/18C08G59/22C08G59/66C08F116/12G02F1/1337G02F1/137G02F1/139
CPCC08F116/12C08G59/226C08G59/66C08J5/18C08J2363/00C08J2429/10C08K5/10C08K5/315G02F1/133788G02F1/13718G02F1/139
Inventor 杨槐李春昕陈梅沈文波陈刚张兰英
Owner 苏州英荟虹彩薄膜材料科技有限公司
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