Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, China.
Adv Mater. 2017 Nov;29(41). doi: 10.1002/adma.201702831. Epub 2017 Sep 11.
Nacre-like graphene films are prepared by evaporation-induced assembly of graphene oxide dispersions containing small amounts of cellulose nanocrystal (CNC), followed by chemical reduction with hydroiodic acid. CNC induces the formation of wrinkles on graphene sheets, greatly enhancing the mechanical properties of the resultant graphene films. The graphene films deliver an ultrahigh tensile strength of 765 ± 43 MPa (up to 800 MPa in some cases), a large failure strain of 6.22 ± 0.19%, and a superior toughness of 15.64 ± 2.20 MJ m , as well as a high electrical conductivity of 1105 ± 17 S cm . They have a great potential for applications in flexible electronics because of their combined excellent mechanical and electrical properties.
仿珍珠母层状石墨烯薄膜是通过在含有少量纤维素纳米晶体（CNC）的氧化石墨烯分散体中进行蒸发诱导组装，然后用氢碘酸进行化学还原制得的。CNC 诱导石墨烯片形成褶皱，极大地增强了所得石墨烯薄膜的机械性能。该石墨烯薄膜具有超高的拉伸强度（765±43MPa，在某些情况下可达 800MPa）、大的断裂应变（6.22±0.19%）和优异的韧性（15.64±2.20MJ m ），以及较高的电导率（1105±17S cm ）。由于其优异的机械和电学性能，它们在柔性电子产品中有很大的应用潜力。
