Aerogels are low density solids with high open porosity and surface area, exceptionally low thermal conductivities, and high acoustic attenuation. They are typically prepared from suitable wet gels by turning the pore‐filling solvent into a supercritical fluid that is vented off. In this research field, we aim to create the next generation of organic aerogels with outstanding mechanical, chemical and thermal stability, and flame retardancy by developing novel aerogels based on high performance structural motifs. They can be envisioned as lightweight super‐insulating materials for aerospace applications, as well as for more down-to-earth uses in construction and transportation. Additionally, they will be used for energy storage and in catalytic applications.
Besides optimizing their properties, we also strive to add the term ‘recyclability’ to the definition of high performance aerogels as a core feature. Depolymerization of aerogels represents a scientific challenge as they are highly crosslinked polymeric materials. By introducing cleavable chemical bonds into the polymer network of these materials, we achieve full depolymerization back to the original building blocks under mild conditions.