Multifunctional composite powder of bipyridine aromatic heterocycle coupled hydromagnesite powder as well as preparation method and application of multifunctional composite powder

The invention belongs to the technical field of design and application of functional materials, and discloses multifunctional composite powder of bipyridine aromatic heterocycle coupled hydromagnesite powder as well as a preparation method and application of the multifunctional composite powder. The preparation method comprises the following steps: performing coordination on a large conjugated nitrogen hybrid serving as a ligand and rare earth metal ruthenium to prepare an organic functional compound of which the surface layer contains bipyridine aromatic heterocycles, and coupling the organic functional compound with hydromagnesite powder to obtain the multifunctional organic-metal-inorganic hybrid composite powder. The bipyridine aromatic heterocyclic ring coupled brucite powder prepared by the invention has better catalysis, flame retardance, char formation and smoke suppression properties, also has a lower oil absorption value, not only can promote the processing fluidity, but also can reduce the processi