Journal
ACS NANO
Volume 9, Issue 9, Pages 8933-8941Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b02781
Keywords
graphene; polyimide; mechanically flexible; superelastic; strain sensor
Categories
Funding
- Natural Science Foundation in China [NSFC 11272109]
- Ph. D. Programs Foundation of Ministry of Education of China [20122302110065]
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The creation of superelastic, flexible three-dimensional (3D) graphene-based architectures is still a great challenge due to structure collapse or significant plastic deformation. Herein, we report a facile approach of transforming the mechanically fragile reduced graphene oxide (rGO) aerogel into superflexible 3D architectures by introducing water-soluble polyimide (PI). The rGO/PI nanocomposites are fabricated using strategies of freeze casting and thermal annealing. The resulting monoliths exhibit low density, excellent flexibility, superelasticity with high recovery rate, and extraordinary reversible compressibility. The synergistic effect between rGO and PI endows the elastomer with desirable electrical conductivity, remarkable compression sensitivity, and excellent durable stability. The rGO/PI nanocomposites show potential applications in multifunctional strain sensors under the deformations of compression, bending, stretching, and torsion.
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