Effects of monomer rigidity on the microstructures and properties of polyimide aerogels cross-linked with low cost aminosilane

Polyimide aerogels were formed from polyamide acid oligomers cross-linked by Si–O–Si network structures, which were derived from hydrolysis and condensation reactions of low cost bis(trimethoxysilylpropyl) amine (BTMSPA)viaabsorbed water.