Colorful liquid crystal material and preparation process thereof

Abstract

The invention relates to a colorful liquid crystal material and a preparation process thereof, and the preparation process comprises the following steps: preparing a matrix layer: adding liquid crystal polyester resin, mesoporous titanium dioxide microspheres, hollow glass beads and a solvent into a polymerization stirring kettle to obtain a prefabricated matrix layer, and orienting the prefabricated matrix layer through ultraviolet initiation to prepare a transparent matrix layer; preparing a dimming film raw material: uniformly mixing nano SiO2 particles with nano-scale anatase TiO2 particles, conducting smelting and stirring, pouring the stirred material into a shaping mold for cooling, and conducting cutting and polishing to obtain a SiO2 / TiO2 composite target material; and depositing the SiO2 / TiO2 composite target material obtained in the second step on a base body layer through a magnetron sputtering method to form a dimming film, and conducting auxiliary guiding of microwave irradiation. The mechanical performance of the liquid crystal material can be effectively enhanced, and the liquid crystal material is high in wear resistance, good in soft light performance and good in colorful effect.

Description

technical field [0001] The invention relates to the field of liquid crystal technology, in particular to a colorful liquid crystal material and a preparation process thereof. Background technique [0002] Liquid crystals can flow like liquids (fluidity), but their molecules are aligned like roads (anisotropy). There are many different types of liquid crystal phases, which can be distinguished by their different optical properties such as birefringence. When viewed under a microscope using a polarized light source, different liquid crystal phases will appear with different textures. Different textures in the texture contrast region correspond to different liquid crystal molecules. Under normal circumstances, light will be strongly scattered inside the liquid crystal, and the scattering intensity is as high as 1 million times that of ordinary liquids. Therefore, the liquid crystal is cloudy and opaque, but after orientation treatment, the liquid crystal will become transpar...

AI Technical Summary

Problems solved by technology

In the prior art, liquid crystals with strong fluidity have poor mechanical properties, and are mostly reflected in their weak wear resistance and poor mechanical strength, and are easily broken and damaged. As disclosed in Patent No. CN108504363A: "A low driving voltage Polymer-dispersed liquid crystal film", after mixing two kinds of nematic liquid crystals, acrylic monomers, acrylate oligomers, and anti-aging agents, add photoinitiators and glass beads, and continue to stir until uniform. Coated between two layers of transparent conductive films, rolled to form a film, and then irradiated with 365mm ultraviolet light for 1-20min at 0.1-20C above the clearing point of the polymerizable monomer and liquid crystal mixture to prepare a liquid crystal film, but Its mechanical strength is weak, and it is not resistant to impact and wear. It is necessary to install corresponding protective devices on the outside of the liquid crystal film to maintain the normal operation of the liquid crystal film. The processing and assembly steps are cumbersome.

[0004] Some liquid crystal materials have good mechanical strength, which often reduce the viscosity of liquid crystal materials to enhance the toughness of liquid crystal materials, as disclosed in Patent No. CN102071031A: "a preparation method of epoxy-based polymer dispersed liquid crystal film material", Evenly mix liquid crystal, thermal polymerizable monomer, curing agent and glass microspheres, sandwich them between two conductive films coated with indium tin oxide, and press them evenly with a roller to form a film layer with a thickness of 20 microns to 30 microns. Heat curing at 80-100°C for 6-8 hours to prepare polymerized dispersed liquid crystal film, reduce the viscosity of the mixed system, reduce the refractive index of the liquid crystal film, and improve the open state pass rate, but its optical properties are in softness The performance is not good, the achieved dazzling effect is not good, and some LCDs need to add corresponding light filter films, the actual dazzling experience is poor

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