Method of producing an aluminosilicate reinforced silicone syntactic thermal protection system

A method of producing a thermal protection system, the method comprising:

• hydrating halloysite nanotubes to form hydrated halloysite nanotubes that contain water molecules trapped within scroll-like sheets, wherein the water molecules are between concentric layers of the scroll-like sheets and wherein hydrating the halloysite nanotubes comprises at least one of (i) soaking the halloysite nanotubes in water and subsequently drying to remove excess water, or (ii) exposing the halloysite nanotubes to non-condensing water vapor;
• treating the hydrated halloysite nanotubes with a silane coupling agent to increase surface energy and to enable formation of strong chemical bonds between the hydrated halloysite nanotubes and a silicone-based matrix material;
• and
• combining the silicone-based matrix material and the treated hydrated halloysite nanotubes to form a syntactic foam, wherein the hydrated halloysite nanotubes release water upon ablation to provide evaporative cooling, and wherein the syntactic foam is adapted for use in a thermal protection system to withstand high-temperature thermal cycling and ablation.