期刊
NATURE COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms7141
关键词
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资金
- MoST [2012CB933401, 2014CB643502]
- NSFC [51273093, 21374050]
- MoE in China [B12015]
- U.S. Air Force Office of Scientific Research MURI in the United States [FA9550-12-1-0035]
- Creative Research Initiative Center for Bio-Artificial Muscle of the Ministry of Education, Science and Technology (MEST)
- MEST-US Air Force Cooperation Program in Korea [2012-00074]
It is a challenge to fabricate graphene bulk materials with properties arising from the nature of individual graphene sheets, and which assemble into monolithic three-dimensional structures. Here we report the scalable self-assembly of randomly oriented graphene sheets into additive-free, essentially homogenous graphene sponge materials that provide a combination of both cork-like and rubber-like properties. These graphene sponges, with densities similar to air, display Poisson's ratios in all directions that are near-zero and largely strain-independent during reversible compression to giant strains. And at the same time, they function as enthalpic rubbers, which can recover up to 98% compression in air and 90% in liquids, and operate between -196 and 900 degrees C. Furthermore, these sponges provide reversible liquid absorption for hundreds of cycles and then discharge it within seconds, while still providing an effective near-zero Poisson's ratio.
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