The invention belongs to the field of application of
liquid crystal materials, and provides a method for preparing a wide wave reflective film by using a
polymer stabilized cholesteric phase
liquid crystal material. The
polymer stabilized cholesteric phase
liquid crystal material can be widely used in the fields of light enhancement films of liquid
crystal displays, energy-saving glass sticking films and the like. The method comprises a process that the wide wave reflective film is prepared by evenly mixing a non-photopolymerisable nematic phase micro-molecule liquid
crystal, a photopolymerisable nematic phase liquid
crystal monomer, a chiral compound and a
photoinitiator in a certain
mass ratio; and a
polymer network is formed through
ultraviolet radiation. In the method, a liquid crystal box is soaked in
organic solvent to extract the unreacted micro-molecule liquid crystal so as to obtain a pure
polymer network; a coarse-
pitch cholesteric phase liquid crystal is injected into the
system; and
ultraviolet polymerization is performed again to fix the swelling process of the
polymer network so as to form the polymer stabilized cholesteric phase liquid crystal material with wide wave reflection. The method has the advantages that the
material system and the manufacturing process are simple, the material source is extensive, and the reflected wave width and the reflection position of the
system can be adjusted by changing the reflection positions of the
polymer network and the injected cholesteric phase liquid crystal.