A polymer-dispersed liquid crystal film doped with nanoparticles and its preparation method

Abstract

The invention discloses a nanoparticle-doped polymer dispersed liquid crystal (PDLC) thin film and a preparation method thereof. A driving voltage V<sat> and contrast ratio CR of the thin film are adjusted by adjusting a mesh size of a polymer network, the transmittance T of near-infrared band of the thin film is adjusted by adjusting doping quantity of nanoparticle, the driving voltage of the PDLC thin film can be reduced by appropriate doping of the nanoparticle, so that the thin film which has excellent photoelectric performance and can be used for shielding infrared ray and ultraviolet rayis obtained, an atomized scattering state is converted to a transparent state under a relatively low voltage, and the thin film has wide application prospect in the correlated field of liquid crystaldisplay, intelligent glass, energy-saving building materials and automobile decoration.

Description

technical field [0001] The invention belongs to the field of optical thin film technology and the field of nanotechnology, in particular to a preparation of polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal, PDLC) based on an acrylate-thiol ultraviolet light curing system and a preparation method thereof. The prepared film material can be widely used It is used in liquid crystal display, smart glass, energy-saving building materials, automobile decoration and related fields. Background technique [0002] Polymer Dispersed Liquid Crystal (hereinafter referred to as PDLC) is a composite material formed by uniformly dispersing liquid crystal droplets in a polymer matrix. Because of its special electro-optic response performance, it has become a research hotspot in the field of flat panel display. PDLC has the advantages of high contrast, simple preparation, and no need for polarizers, so PDLC film materials are used in smart glass, tunable filters, scattering p...

AI Technical Summary

Problems solved by technology

Usually, the vast majority of UV-polymerized monomer systems generally choose acrylate monomers as diluents to adjust the viscosity and reaction rate of the system, but these diluents have the disadvantages of being volatile, highly toxic, and irritating. , so the problem of environmental pollution caused by use is difficult to overcome, and its use has been restricted in some countries

Nowadays, seeking a low-toxicity and low-irritation diluent monomer has become an urgent problem to be solved; most of the polymer matrix of the current PDLC film has only a single mesh structure, which has greatly limited the improvement of its performance.

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