Large-scale assembly of isotropic nanofiber aerogels based on columnar-equiaxed crystal transition.

ABSTRACT: Ice-templating technology holds great potential to construct industrial porous materials from nanometers to the macroscopic scale for tailoring thermal, electronic, or acoustic transport. Herein, we describe a general ice-templating technology through freezing the material on a rotating cryogenic drum surface, crushing it, and then re-casting the nanofiber slurry. Through decoupling the ice nucleation and growth processes, we achieved the columnar-equiaxed crystal transition in the freezing procedure. The highly random stacking and integrating of equiaxed ice crystals can organize nanofibers into thousands of repeating microscale units with a tortuous channel topology. Owing to the spatially well-defined isotropic structure, the obtained Al₂O₃·SiO₂ nanofibe

SUBMITTER: Li L 

PROVIDER: S-EPMC10480443 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature