Hierarchical highly porous composite ceramic material modified by hydrophobic methyltrimetoxysilane-based aerogel

A highly porous composite material consisting of silicon dioxide microfibers filled with nanoporous methyltrimethoxysilane-based aerogel was synthesized by a sol-gel procedure followed by supercritical drying in isopropanol and CO2. The textural and mechanical properties of the composite were studied. A synergism of the mechanical properties of components was demonstrated. The material showed high hydrophobic properties-the water drop contact angle was 142 degrees after 14 days under 100% humidity and low water absorption was found. The composite material retained its mechanical integrity after several freeze-thaw procedures.

Automated summary

The composite material exhibits high hydrophobic properties and low water absorption, while maintaining mechanical integrity after multiple freeze-thaw cycles.