Topological Design of Ultrastrong and Highly Conductive Graphene Films
Topological Design of Ultrastrong and Highly Conductive Graphene Films
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超强高导电石墨烯薄膜的拓扑设计
DOI：
10.1002/adma.201702831
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发表时间：
2017
影响因子：
29.4
通讯作者：
Shi Gaoquan
中科院分区：
文献类型：
--
作者：
Wen Yeye;Wu Mingmao;Zhang Miao;Li Chun;Shi Gaoquan
珍珠状石墨烯膜通过含有少量纤维素衍生物（CNC）的氧化石墨烯分散体的蒸发诱导组装，然后用氢碘酸进行化学还原来制备。CNC诱导石墨烯片上褶皱的形成，极大地增强了所得石墨烯膜的机械性能。石墨烯薄膜的抗拉强度为765 ± 43 MPa（在某些情况下高达800 MPa），断裂应变为6.22 ± 0.19%，韧性为15.64 ± 2.20 MJ m−3，上级，电导率为1105 ± 17 S cm−1。由于其优异的机械和电气性能，它们在柔性电子产品中具有很大的应用潜力。
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−3, as well as a high electrical conductivity of 1105 ± 17 S cm−1. They have a great potential for applications in flexible electronics because of their combined excellent mechanical and electrical properties.