Folk arts-inspired twice-coagulated configuration-editable tough aerogels enabled by transformable gel precursors

Lishan Li, Guandu Yang, Jing Lyu, Zhizhi Sheng, Fengguo Ma and Xuetong Zhang ()
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Lishan Li: Chinese Academy of Sciences
Guandu Yang: Chinese Academy of Sciences
Jing Lyu: Chinese Academy of Sciences
Zhizhi Sheng: Chinese Academy of Sciences
Fengguo Ma: Qingdao University of Science and Technology
Xuetong Zhang: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Aerogels, as famous lightweight and porous nanomaterials, have attracted considerable attention in various emerging fields in recent decades, however, both low density and weak mechanical performance make their configuration-editing capability challenging. Inspired by folk arts, herein we establish a highly efficient twice-coagulated (TC) strategy to fabricate configuration-editable tough aerogels enabled by transformable gel precursors. As a proof of concept, aramid nanofibers (ANFs) and polyvinyl alcohol (PVA) are selected as the main components of aerogel, among which PVA forms a flexible configuration-editing gel network in the first coagulation process, and ANF forms a configuration-locking gel network in the second coagulation process. TC strategy guarantees the resulting aerogels with both high toughness and feasible configuration editing capability individually or simultaneously. Altogether, the resulting tough aerogels with special configuration through soft to hard modulation provide great opportunities to break through the performance limits of the aerogels and expand application areas of aerogels.

Date: 2023
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DOI: 10.1038/s41467-023-44156-4

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