Improvement of Solvent Exchange for Supercritical Dried Aerogels

The solvent exchange as one of the most important steps during manufacturing process organic aerogels was investigated. This step is crucial a preparatory for supercritical drying, since pore must be soluble in carbon dioxide to enable extraction. development and subsequent optimization suitable system with peristaltic pump automatic proved approach. In addition, influence zeolites on acceleration found beneficial. To investigate process, water content acetone determined at different times using Karl Fischer titration. shrinkage, densities, well surface areas were analyzed. Based these, various parameters final structure obtained investigated evaluated. Modeling diffusion porous materials completes this study.