Modified dust-collecting powder, as well as preparation method and application thereof

The invention discloses a method for preparing modified dust-collecting powder. According to the preparation method, the modified dust-collecting powder is prepared by performing surface chemical coupling and neutral modifying treatment on dust-collecting powder raw materials with a chemical modifier consisting of coupler, neutralizer and the like; one or more organic groups with saturated or unsaturated structure is chemically bonded to the particle surface, the hydrophobicity of the particle surface is improved (activation index is more than 0.95), the binding force between modified dust-collecting powder particles and rubber matrix can be reinforced, and the strong basicity (pH is 10) of the dust-collecting powder is neutralized, so that the dust-collecting powder is neutral dust-collecting powder having pH of 7-8. The method has the advantages of energy conservation, environmental friendliness, high utilization degree (more than 90 percent) of dust-collecting powder, wide particlefineness selection range