Thermal insulation aerogel composite material, preparation method and application

The invention discloses a heat insulation aerogel composite material which comprises a melt-blown non-woven fabric layer and a silicon dioxide composite aerogel layer, and the silicon dioxide composite aerogel layer is prepared from silicon dioxide sol, a foaming agent, a tackifier, deionized water and a hollow rod-like material. The hollow rod-like material is at least one of hollow rod-like ferroferric oxide, hollow rod-like titanium dioxide, hollow rod-like zirconium boride, hollow rod-like magnesium fluoride, hollow rod-like calcium carbonate and hollow rod-like zinc oxide. Compared with the prior art, the hollow rod-like material has better compatibility with a silicon dioxide aerogel system, and is small in density and large in specific surface area, and the hollow rod-like material is added into the silicon dioxide aerogel system, so that not only can the mechanical property of the silicon dioxide aerogel system be enhanced, but also the heat insulation property of the composite material is improved, a