Boehmite Nanofiber–Polymethylsilsesquioxane Composite Aerogels: Synthesis, Analysis, and Thermal Conductivity Control via Compression Processing

Boehmite nanomaterials have been researched for use in applications such as separation media, fillers resins, and catalyst support. This study investigates the relationship between structural density mechanical thermal performance of boehmite nanofiber-polymethylsilsesquioxane (PMSQ) composite aerogels. Tri-functional organosilicon alkoxide methyltrimethoxysilane (MTMS) was added to a nanofiber aqueous dispersion; colloidal nanofibers were coated bonded with polymethylsilsesquioxane, produce transparent translucent wet gel monoliths. Low bulk aerogel panels prepared by CO2 supercritical drying monoliths before their properties conductivity investigated. As amount MTMS starting composition increased, fibrillar monolith skeleton PMSQ thickened. Correspondingly, Young's modulus decreased. When small, it possible deform uniaxial compression. After 30% compression panel, suppressed 19%. The response compressive deformation fibrous aerogels, after fabrication, may inform future insulation material development. By adding dispersion, colloid physically polymethylsilsesquioxane form opaque porous monolith. obtained materials changed according added. flexible deformation.