Morphology of cross-linked cellulose nanocrystal aerogels: cryo-templating versus pressurized gas expansion processing

Cellulose nanocrystal (CNC)-based aerogels are often produced through cryo-templating, followed by either critical point drying or freeze drying. While cryo-templating gives aerogels with a bimodal pore size distribution, better morphological control may be needed for certain applications. This work compares CNC aerogels prepared using a new processing method, called pressurized gas expansion (PGX) technology, to aerogels produced via …