Preparation method and application of ultrathin aerogel composite light thermal insulation material

The invention discloses a preparation method and application of an ultrathin aerogel composite light thermal insulation material, the preparation method comprises the steps of sol preparation, infiltration, aging and drying, by optimizing the raw material ratio and reaction time in the sol preparation process and reasonably adjusting the pH value of a sol solution, the prepared aerogel product is excellent in three-dimensional network structure, and the aerogel composite light thermal insulation material has good thermal insulation performance. Meanwhile, by adjusting the dosage ratio of the solution, the particle size of aerogel particles in the sol process can be better adjusted and controlled, the aerogel particles are suitable, subsequent full infiltration compounding of melamine foam is facilitated, meanwhile, the drying process is also facilitated, and the preparation method is suitable for industrial production. The prepared aerogel melamine composite material is excellent in heat conductivity coeffici