Functional nanoparticle composite microsphere powder and preparation method and use therefor

Disclosed are functional nanoparticle composite non-crosslinking microsphere powder, crosslinking microsphere powder, and a preparation method and use therefor. The functional nanoparticle composite non-crosslinking microsphere powder comprises functional nanoparticle composite non-crosslinking microspheres comprising functional nanoparticles and polymers, and has an average particle size of 0.1-20 μm with a variation coefficient of particle size distribution being ≤9.1%; the functional nanoparticle composite crosslinking microsphere powder comprises functional nanoparticle composite crosslinking microspheres comprising functional nanoparticles, a monomer, a crosslinking agent, and an initiator, and has an average particle size of 0.1-20 μm with a variation coefficient of particle size distribution being ≤9.6%. The above-mentioned microsphere powder is prepared by using a membrane emulsification technique in combination with a solvent evaporation method or an emulsion polymerization method.