A kind of preparation method of bistable dye-doped liquid crystal film

A liquid crystal thin film and doping technology, which is applied in the fields of fine chemical industry and material science, can solve problems such as liquid crystal bistable state, achieve good solvent resistance and water resistance, bright and changeable colors, and bright color effects

Active Publication Date: 2020-11-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of the bistable state of the above-mentioned dye-doped liquid crystal, the present invention designs a bistable dye-doped liquid crystal film

Method used

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  • A kind of preparation method of bistable dye-doped liquid crystal film
  • A kind of preparation method of bistable dye-doped liquid crystal film
  • A kind of preparation method of bistable dye-doped liquid crystal film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In a light-shielding environment, 4.0 g epoxy resin, 0.5 g photoinitiator IRG184, 1.5 g hydroxypropyl methacrylate, 1.5 g lauryl methacrylate, and 3.0 g paraffin phase change material were mixed in proportion; Stir uniformly at about ℃ for about 30 minutes; the obtained mixture A; mix the mixture A with dye-doped liquid crystal (0.20g C.I. Disperse Red 135; 20.0 g liquid crystal E7), and stir uniformly at about 40℃ for about 30 minutes; the obtained mixture B; add 5‰ spacers with a diameter of 20 microns and mix with B, and stir evenly at about 40°C for about 30 minutes; obtain the final bistable dye-doped liquid crystal film raw material; coating and pressing; curing under ultraviolet light, the Air bubbles remaining trapped in the film are completely pumped out. The photoelectric performance test (see Table 1) and the water resistance and solvent resistance performance test (see Table 2) were carried out on the bistable dye-doped liquid crystal film prepared above.

Embodiment 2

[0039] In a light-shielding environment, mix 3.0 g epoxy resin, 0.3 g photoinitiator IRG651, 2.0 g styrene, 2.0 g lauryl methacrylate, and 3.0 g paraffin phase change material in proportion; after mixing, stir evenly at about 40 °C About 30 minutes; the obtained mixture A; mix the mixture A with dye-doped liquid crystal (0.23g C.I. Disperse Blue 359; 23.0 g liquid crystal E7), and stir evenly at about 40°C for about 30 minutes; the obtained mixture B; add 5 ‰ spacers with a diameter of 20 microns are mixed with B, and stirred evenly at about 40°C for about 30 minutes; the final bistable dye-doped liquid crystal film raw material is obtained; coating and pressing; curing under ultraviolet light, leaving the residue in the film Air bubbles are completely drawn out. The photoelectric performance test (see Table 1) and the water resistance and solvent resistance performance test (see Table 2) were carried out on the bistable dye-doped liquid crystal film prepared above.

Embodiment 3

[0041] In a light-shielding environment, mix 5.0 g epoxy resin, 0.7 g photoinitiator IRG184, 3.0 g ethyl methacrylate, 3.0 g lauryl methacrylate, and 5.0 g paraffin phase change material in proportion; Stir uniformly from side to side for about 30 minutes; the obtained mixture A; mix the mixture A with dye-doped liquid crystal (1.15g C.I. Disperse Yellow 90; 15.0 g liquid crystal 5CB), and stir uniformly at about 40°C for about 30 minutes; the obtained mixture B Add 5‰ spacers with a diameter of 20 microns and mix with B, and stir evenly at about 40°C for about 30 minutes; obtain the final bistable dye-doped liquid crystal film raw material; coat and press; cure under ultraviolet light, and remove the remaining Air bubbles trapped in the film are completely pumped out. The photoelectric performance test (see Table 1) and the water resistance and solvent resistance performance test (see Table 2) were carried out on the bistable dye-doped liquid crystal film prepared above.

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Abstract

The invention, which belongs to the technical fields of fine chemical engineering and materials science, discloses a method for preparing a bistable-state dye-doped liquid crystal film. The method comprises: step one, mixing resin, a photoinitiator, a monomer and a phase change material in proportion and carrying stirring to obtain a mixture A; step two, mixing the 30% to 40% of mixture A with 60%to 70% of dye-doped liquid crystals and carrying stirring to obtain a mixture B; step three, adding a spacer and mixing the spacer with the mixture B, and carrying out stirring to obtain a raw bistable-state dye-doped liquid crystal film material; and step four, carrying out coating, laminating, and curing. According to the invention, the prepared bistable-state dye-doped liquid crystal film changes colors under the coordinated control of electricity and temperature; the continuous stable state of a certain color changing state can be realized under conditions of low temperature and power failure; the colors are bright and changeable; the driving voltage is low; the bistable-state dye-doped liquid crystal film has good solvent-resistant and water-resistant performances; and people's requirements on the personalization and diversity of liquid crystal color displaying in flexible display and smart textiles can be met.

Description

technical field [0001] The invention relates to a method for preparing a bistable dye-doped liquid crystal film, which belongs to the technical fields of fine chemical industry and material science. Background technique [0002] For a long time, liquid crystal displays have been widely used in practice because of their excellent optical properties and electro-optic effects. Dye-doped liquid crystals have gradually become a research hotspot due to their advantages such as low driving voltage and full-spectrum colorful display. For example, the K.L. Cheng research group in Taiwan, China, obtained a liquid crystal microcapsule with multiple color effects by adding dichroic dyes to the liquid crystal microcapsule. cross pattern". Fu Shaohai's research group at Jiangnan University used emulsion polymerization to prepare dye-doped liquid crystal microcapsules, and used textile coating technology to prepare electrochromic textiles with a driving voltage between 3 and 6V. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1333G02F1/1334
CPCG02F1/1333G02F1/1334G02F1/1391
Inventor 付少海张丽平盛明非王成成
Owner JIANGNAN UNIV
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