Surface modified glass bead composite filler as well as preparation method and application thereof

The invention relates to a surface modified glass bead composite filler as well as a preparation method and application thereof, and belongs to the technical field of polymer composite materials. The preparation method of the surface-modified glass bead composite filler comprises the following steps: by taking glass beads as a raw material, firstly treating the glass beads with an aqueous solution of a pretreating agent, then treating the glass beads with a surfactant, then forming gel with potassium silicate water glass, and finally aging, suction-filtering, washing and drying the gel to obtain the surface-modified glass bead composite filler. The surface modified glass bead composite filler can greatly enhance the interface bonding force between a polymer and glass beads. The invention also provides application of the surface modified glass bead composite filler in preparation of a thermoplastic polyurethane elastomer composite material, and the prepared thermoplastic polyurethane elastomer composite materi