Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 21, Pages 18001-18007Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b04687
Keywords
carbon aerogel; cellulose; oil-absorption; pyrolysis; compressible
Funding
- Hundred Talents Program of the Chinese Academy of Sciences
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Multifunctional carbon aerogels that are both highly compressible and conductive have broad potential applications in the range of sound insulator, sensor, oil absorption, and electronics. However, the preparation of such carbon aerogels has been proven to be very challenging. Here, we report fabrication of pressure-sensitive and conductive (PSC) carbon aerogels by pyrolysis of cellulose aerogels composed of poplars catkin (PC) microfibers with a tubular structure. The wet PC gels can be dried directly in an oven without any deformation, in marked contrast to the brittle nature of traditional carbon aerogels. The resultant PSC aerogels exhibit ultralow density (4.3 mg cm(-3)), high compressibility (80%), high electrical conductivity (0.47 S cm(-1)), and high absorbency (80161 g g(-1)) for oils and organic liquids. The PSC aerogels have potential applications in various fields such as elastomeric conductors, absorption of oils from water and oil/water separation, as the PSC aerogels feature simple preparation process with low-cost biomass as the precursor.
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