Fracture and Fatigue in Graphene Nanocomposites
Fracture and Fatigue in Graphene Nanocomposites
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DOI：
10.1002/smll.200901480
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发表时间：
2010-01-18
期刊：
影响因子：
13.3
通讯作者：
Koratkar, Nikhil
中科院分区：
文献类型：
--
作者：
Rafiee, Mohammad A.;Rafiee, Javad;Koratkar, Nikhil
石墨烯是二维网络中的单原子厚度的碳片，由于其高比表面积以及出色的机械、电和热性能而成为关注的中心(Li和Kaner 2008，Kudin等人)。2008年，Geim和Novoselov，2008年，Shedin等人。2007年，Elias等人。2009年，周，Gweon at al.2007年，Li，魏等人。2008年)。从天然石墨片合成大量剥离的几层石墨烯的最新进展使石墨烯基复合材料的制造成为可能(Schniepp等人)。2008年，麦卡利斯特等人。2007年，Stankovich等人。2006)。这些复合材料表现出极大的机械性能改进潜力，因为它们结合了巨大的比表面积、强大的填料-基质粘附力以及石墨烯层中sp2碳键网络的特殊机械性能(Stankovich，Dikin等人)。2006年，Ramanathan等人。2008年)。石墨烯填料已被有效地用于聚苯乙烯、聚丙烯腈和聚甲基丙烯酸甲酯基质中，并成功地表征了它们的杨氏模数(弹性模数或E)、极限拉伸强度(UTS)和玻璃化转变温度(Tg)的响应(Stankovich，Dikin等)。2006年，Ramanathan等人。2008年)。然而，就我们所知，还没有关于石墨烯基聚合物复合材料的断裂和疲劳性能的研究。断裂韧性(KIC)解释了有裂纹的材料抵抗断裂的能力；它是设计应用中最重要的材料特性之一。疲劳载荷是循环载荷作用下裂纹的动态扩展，是结构材料灾难性失效的主要原因之一。因此，材料的抗断裂性和疲劳裂纹扩展对于避免早期失效是极其重要的。
Graphene, a single-atom-thick sheet of carbon in a 2-D network, has been the center of attention owing to its high specific area and outstanding mechanical, electrical, and thermal properties (Li and Kaner 2008, Kudin et al. 2008, Geim and Novoselov 2008, Shedin et al. 2007, Elias et al. 2009, Zhou, Gweon at al. 2007, Li, Wei et al. 2008). Recent progress in the synthesis of bulk quantities of exfoliated few-layer graphene from natural graphite flakes have enabled the manufacture of graphene-based composite materials (Schniepp et al. 2008, McAllister et al. 2007, Stankovich et al. 2006). These composites showed very high potential for mechanical-property improvement due to their combination of enormous specific surface area, strong filler-matrix adhesion and the exceptional mechanical properties of the sp 2 carbon bonding network in graphene layers (Stankovich, Dikin et al. 2006, Ramanathan et al. 2008). Graphene fillers have been effectively utilized in polystyrene, polyacrylonitrile and polymethyl-methacrylate matrices and responses of their Young’s modulus (elastic modulus or E), ultimate tensile strength (UTS), and glass-transition temperature (Tg) have been successfully characterized (Stankovich, Dikin et al. 2006, Ramanathan et al. 2008). Nevertheless, to the best of our knowledge there is no study on the fracture and fatigue properties of graphene-based polymer composites. Fracture toughness (KIc) explains the ability of a material with a crack to resist fracture; it is one of the most significant material properties for design applications. Fatigue loading engages dynamic propagation of cracks under cyclic loading conditions, and is one of the main sources of catastrophic failure in structural materials. As a result, the material’s resistance to fracture and fatigue crack propagation are of extreme importance to avoiding premature failure.