Low shrinkage, high porosity polyimide composite aerogels containing silica nanoparticles
발표자
()
초록
내용
Aerogels are ultralight materials with high porosity, low density, large surface area, and low thermal conductivity, leading to the application in many fields like energy storage, catalysis, sensor, and thermal and acoustic insulation. PI aerogels have recently drawn much attention due to excellent mechanical properties and high-temperature stability. However, the loss of porosity and strength due to large shrinkage during the formation of PI aerogels has led to the loss of their performance, and various efforts have been made to improve such problems. In this work, polyimide aerogels cross-linked with silica nanoparticles are synthesized to reduce shrinkage and enhance strength. Silica nanoparticle with varying weight percent was added into the PI precursor solution, and the structures of the resulting composite aerogel and pure PI aerogel were confirmed by SEM, and the characteristics of PI aerogels such as the shrinkage, density, and porosity were measured.