Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 4, Issue 6, Pages 2069-2074Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta10001a
Keywords
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Funding
- Hundred Talents Program of the Chinese Academy of Sciences
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Ultralight, compressible and multifunctional carbon aerogels (UCM aerogels) have broad potential applications in various fields including thermal insulation, oil absorption and electronics. However, the preparation of UCM aerogels has been proven to be very challenging. Herein, we report a novel approach for the fabrication of UCM aerogels by pyrolysis of aerogels composed of kapok fibers (KFs), a kind of natural cellulose with a tubular structure. Different from the frequently used freeze-drying approach, the wet KF aerogels can be dried directly in an oven without any shrinkage. The fascinating UCM aerogels feature ultralow density (similar to 1.0 mg cm(-3)), high compressibility, high electrical conductivity (0.1 S cm(-1)), excellent fire-resistance and very high absorption capacity (147-292 g g(-1)) for organic liquids. Furthermore, the UCM aerogels can be easily endowed with various other functions, e.g., magnetic responsivity and superhydrophobicity. The successful creation of the UCM aerogels may provide new insights into the design of UCM aerogels for various applications, as the UCM aerogels can be prepared via a very simple procedure.
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