Electrophoretic particle and preparation method therefor and application thereof

A method for preparing electrophoretic particles, wherein each electrophoretic particle comprises a shell layer and a core layer wrapped in the shell layer, the core layer comprises a plurality of core particles, and a density of the plurality of core particles is lower than a density of the shell layer, and a structure of the plurality of core particles makes the shell layer wrapping on surfaces of the plurality of core particles form a folded structure, the method comprising the steps of:

• providing the plurality of core particles and a precursor material for preparing the shell layer;
• and
• dispersing the plurality of core particles in an organic solvent to obtain a first core particle dispersion;
• mixing the precursor material and an organic solvent to obtain a first precursor material mixed solution;
• and dropping the first precursor material mixed solution into the first core particle dispersion for mixing and heating reaction to obtain electrophoretic particles;
• or alternatively,
• providing the plurality of core particles and a precursor material for preparing the shell layer;
• and
• dispersing the plurality of core particles and an organic solvent to obtain a second core particle dispersion having a saturated concentration;
• mixing the precursor material with an organic solvent to obtain a second precursor material mixed solution, wherein the second precursor material mixed solution has a mass percent concentration of 5% to 35%;
• and dropping the second core particle dispersion into the second precursor material mixed solution for mixing and heating reaction to obtain electrophoretic particles.