High-reflection adjustable liquid crystal film and preparation method thereof

The invention discloses a high-reflection adjustable liquid crystal film and a preparation method thereof. The high-reflection adjustable liquid crystal film comprises the following raw materials: liquid crystal molecules, a photoinitiator, a polymerization inhibitor and a chiral additive in a mass ratio of (89.8-86.4): (3-5): (0.1-0.3): (4-8). The preparation method comprises the following steps: S1, dissolving the raw materials in a mixed organic solvent, and stirring and mixing at 40 DEG C; s2, uniformly coating a liquid crystal material on PET (Polyethylene Terephthalate) with the thickness of a wet film controlled to be 6 microns by using an OSP10 # winding bar; s3, putting the wet film on a tin foil or an iron plate of a drying oven, and baking to remove the solvent; s4, the film is taken out and passes through a UV curing machine, the pitch gradient is fixed, and a formed thin film is obtained; and S5, coating the other surface of the thin film with a mixed solution doped with chiral additives with dif