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Glycera-lnspired Synergistic Interfacial Interactions for Constructing Ultrastrong Graphene-Based Nanocomposites

机译：甘油启发的协同界面相互作用，用于构建超强石墨烯基纳米复合材料

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摘要

The interest in bioinspired graphene-based nanocomposites (BGBNs) is rising recently due to their exceptional mechanical properties as well as high electrical conductivities. Numerous works have suggested that the synergistic interfacial design of ionic bonding (IB) co-working with other interfacial interactions effectively improves the mechanical properties of BGBNs. However, as the ions are conventionally chelated with graphene oxide (GO) nanosheets, the relatively weak and short interlayered IB may hinder the load transfer between GO nanosheets leading to poor synergistic effects. Herein, inspired by the jaw of Glycera, the synergistic effect is further amplified via special IB, which stiffens the organic component. Compared with the traditional IB, the metal-ligand coordinate bonding by copper ions that is used in this work and originates from Glycera, selectively cross-links the chitosan chains. This Glycera-inspired synergistic effect strategy boosts record tensile strength to an extraordinary value of 868.6 MPa, five times higher than that of the pure reduced graphene oxide film. The additional high electrical conductivity enables applications in many fields such as flexible energy devices, supercapacitors, and other electronic devices.
机译：由于受到生物启发的石墨烯基纳米复合材料（BGBNs）出色的机械性能以及高电导率，因此人们对其的兴趣不断增长。大量工作表明，离子键（IB）与其他界面相互作用共同作用的协同界面设计可有效改善BGBN的机械性能。但是，由于离子通常与氧化石墨烯（GO）纳米片螯合，因此相对较弱且较短的中间层IB可能会阻碍GO纳米片之间的负载转移，从而导致不良的协同效应。在此，受甘油颚的启发，通过特殊的IB进一步增强了协同作用，从而增强了有机成分。与传统的IB相比，这项工作中使用的源自甘油的铜离子通过金属配体进行配位键合，从而选择性地交联了壳聚糖链。这种以甘油为灵感的协同效应策略将记录的拉伸强度提高到了非凡的868.6 MPa，是纯氧化石墨烯薄膜的五倍。额外的高电导率使得它可以应用于许多领域，例如柔性能源设备，超级电容器和其他电子设备。

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