期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 6, 页码 5812-5818出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b18459
关键词
graphene films; mechanical properties; high strength; high stiffness; high conductivity
资金
- National Natural Science Foundation of China [51673108, 51433005]
- National Key R&D Program of China [2016YFA0200202]
Reduced graphene oxide (rGO) sheets prepared by a modified Hofmann method (Ho-rGO) have large graphitic domains with few structural defects, facilitating the dense packing between rGO sheets to enhance the mechanical performances of the resultant graphene films. Graphene films are fabricated by the filtration of the aqueous dispersions of Ho-rGO sheets and further treated by thermal annealing. They display high moduli (stiffness) of 54.6 +/- 1.4 GPa and high tensile strengths of 521 +/- 19 MPa. They also exhibit high toughness and good electrical properties. The intact structure of Ho-rGO sheets narrows the nanochannels in the film matrices, greatly reducing the water infiltration into films and providing the graphene films with excellent environmental stability. These graphene films are attractive for practical applications because of their light weights and ultrastiff and ultrastrong mechanical properties.
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