Novel polymerizable mesocrystal mixture coating and application thereof in near-infrared band

Abstract

The invention provides a novel polymerizable mesogenic mixture coating. The novel polymerizable mesogenic mixture coating comprises one or more single-reactive mesogenic compounds; one or more monoreactive mesogenic compounds include a polymerizable backbone body structure and a polar functional group derived from the polymerizable backbone body structure; the polymerizable skeleton body structure is composed of a benzene ring or biphenyl structure and a flexible alkane chain, the tail end of the alkane chain is provided with unsaturated C = C double bonds or acrylate, and the polar functional groups do not comprise alcohols, phenols, amines and amides. The invention also discloses an application of the novel polymerizable mesocrystal mixture coating in preparation of an anisotropic polymer film of a polymerized liquid crystal material. The mesogenic compound coating with high solid content can be prepared at the same time, and molecules are arranged in order after film formation; the formed polymer film is formed by stacking multiple layers, and good alignment can be carried out on the next layer of polymer film.

Description

technical field [0001] The invention relates to the field of polymerizable liquid crystal materials, in particular to a novel polymerizable mesogenic mixture coating and its application in the near-infrared band. Background technique [0002] Liquid crystal materials have birefringence properties, which can control the polarization of light. Using polymerizable mesogenic mixtures, stable liquid crystal polymer films can be formed for modulating the polarization state of light. The thin film is generally prepared by coating methods, such as spin coating, doctor blade coating and the like. Among them, the most critical parameter is the retardation of the liquid crystal polymer film, that is, R=Δnd. where Δn is the birefringence of the material and d is the thickness. [0003] At present, most liquid crystal polymer films are used in the visible light band to prepare films with 1 / 2 wavelength or 1 / 4 wavelength retardation. This demand has lower requirements for retardation a...

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Problems solved by technology

However, as the viscosity increases, the uniformity of the film thickness and the molecular order of the mesogenic compounds generally decrease during the coating process.

[0006] The current technology is insufficient: high solid content mesogenic compound coatings and the properties of molecular orderly arrangement after film formation cannot be obtained at the same time; the formed polymer film cannot be well aligned for the next layer of polymer film; in order to solve the above problems, it is necessary Development of a Novel Mesogenic Compound Coating

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