Cholesteric liquid crystal structure color material, preparation method thereof and application thereof in image-text printing

Abstract

The invention relates to a cholesteric liquid crystal structure color material. The cholesteric liquid crystal structure color material is a sol emulsion formed by uniformly dispersing cholesteric liquid crystals in a polyvinyl alcohol and cationic starch sol system. The invention also provides a preparation method of the cholesteric liquid crystal structure color material. The invention also provides an application of the cholesteric liquid crystal structure color material in image-text printing. The cholesteric liquid crystal structure color material can form a uniformly distributed liquid crystal sol emulsion system, the preparation process is simple, the cost is low, and when the cholesteric liquid crystal structure color material is applied to printing ink, the printing ink can have excellent printability and film-forming property.

Description

technical field

[0001] The invention relates to a structural color ink, in particular to a cholesteric liquid crystal structural color material, a preparation method thereof and an application in graphic printing. Background technique

[0002] Structural color materials widely exist in nature. The color is derived from the Bragg diffraction and selective reflection of visible light by the photonic crystal structure. The construction of photonic crystal microstructure can be realized through the existing technical means, so that the graphic information can be transformed into a Presented in a novel way. This type of structural color material has great application prospects in the field of printing and packaging. Domestic patent documents (publication numbers CN1808214A, CN108530583A and other Chinese invention application instructions) report the application of common colloidal photonic crystals in printing and packaging, but the processing of such materials The cost is high...