Ultralow-density aerogels that have high visible-light transparency were obtained via a simple process. To achieve such materials, aqueous dispersion of boehmite nanofibers (BNF) was used. Hexamethylenetetramine (HMT) was used, which homogeneously raises pH by hydrolysis into ammonia in a mild condition. All the results suggest that the BNF aerogels are formed not by chemical bonds in-between nanofibers or assembling with a morphological change through, for instance, dissolution-reprecipitation of nanofibers, but by physical attractive interactions, which can be strong enough to support the ultralow-density structure. Due to the needle-like structure on the surface, the FAS-treated BNF aerogels exhibit superamphiphobicity, which is essential for antifouling applications.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Chemistry