Method for producing electronic paper material with magnetic addressing and erasing characteristic

Abstract

The invention discloses a preparation method of an electronic paper material having the property of magnetic addressing and magnetic erasing, which pertains to the liquid-crystal display field of functional polymer materials and relates to the fact that magnetic nano particles in liquid crystal can be controlled to move by a magnetic field and cholesteric liquid crystal (CLC) can selectively reflect incident light, and is used for preparing a liquid-crystal display with zero-energy consumption. The specific production process is as follows: Fe3O4 magnetic nano particles are prepared by the method of chemical coprecipitation; manual organic modification is carried out on the surfaces of the Fe3O4 magnetic nano particles; planar orientation treatment is carried out to a liquid crystal box; the CLC is blended; a Fe3O4 / CLC mixture is injected into the liquid crystal box; the magnetic field is exerted at one side of the liquid crystal box, the Fe3O4 magnetic nano particles move towards the surface of the liquid crystal box vertically, the Fe3O4 magnetic nano particles move and gather at the exerted magnetic field area but the color of visible light reflected by other areas around the magnetic field is different from the color reflected by the CLC, thus realizing the magnetic addressing. The method does not need to be driven by energy, has low cost of materials, is easy to process and can be produced on a large scale.

Description

technical field [0001] The invention belongs to the field of liquid crystal displays of functional polymer materials, and relates to liquid crystal materials and magnetic nanomaterials, in particular to magnetic nanoparticles that can be controlled by a magnetic field to move in liquid crystals and cholesteric liquid crystals that selectively reflect incident light and are used to prepare zero A new type of liquid crystal display device that consumes less energy. Background technique [0002] Liquid crystals are partially ordered substances composed of rod-shaped molecules, disc-shaped molecules, and other molecules that do not have spherical symmetry. It is not only different from the isotropic liquid whose molecular arrangement is completely chaotic, but also different from the crystal whose molecular arrangement is completely ordered. This molecular arrangement between crystals and liquids and the special shape and properties of the molecules themselves lead to liquid cr...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcoming that the existing electronic paper material still consumes a certain amount of energy at the moment of information addressing and erasing, and develop a zero-energy consumption magnetic addressing magnetic erasing electronic paper material (should be called magnetic paper, But here for convenience, the traditional title is used)

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