“…At one time, chemical crosslinking agents, such as octa(aminophenyl) silsesquioxane (OAPS), , 1,3,5-triaminophenoxybenzene (TAB), − and 1,3,5-benzenetricarbonyl trichloride (BTC), − have been used for fabricating PI aerogels to reduce the shrinkage effectively. Recently, functionally modified nanoparticles such as silica, ,, carbon nanotubes (CNTs), − TiC 2 T x (MXene), graphene oxide (GO), and methylcellulose (MC) are introduced to prepare low-shrinkage PI composite aerogels via chemical and/or physical interactions. However, a continuing challenge in such an area is balancing the low density, high modulus, and superthermal insulation properties of PI aerogels.…”