Three-dimensionally bonded spongy graphene material with super compressive elasticity and near-zero Poisson's ratio
Three-dimensionally bonded spongy graphene material with super compressive elasticity and near-zero Poisson's ratio
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具有超强压缩弹性和近零泊松比的三维粘合海绵状石墨烯材料
DOI：
10.1038/ncomms7141
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发表时间：
2015-01-01
影响因子：
16.6
通讯作者：
Chen, Yongsheng
中科院分区：
文献类型：
--
作者：
Wu, Yingpeng;Yi, Ningbo;Chen, Yongsheng
制造具有由单个石墨烯片的性质产生的性质并且组装成单片三维结构的石墨烯块体材料是一个挑战。在这里，我们报告了随机取向的石墨烯片成无添加剂的可扩展的自组装，基本上均匀的石墨烯海绵材料，提供软木样和橡胶样性质的组合。这些石墨烯海绵的密度与空气相似，在可逆压缩到巨大应变的过程中，在所有方向上都显示出接近零的泊松比，并且在很大程度上与应变无关。与此同时，它们还可以作为弹性橡胶，在空气中可以恢复高达98%的压缩，在液体中可以恢复90%的压缩，并在-196至900摄氏度之间工作。此外，这些海绵提供可逆的液体吸收数百个周期，然后在几秒钟内排出，同时仍然提供有效的接近零的泊松比。
It is a challenge to fabricate graphene bulk materials with properties arising from the nature of individual graphene sheets, and which assemble into monolithic three-dimensional structures. Here we report the scalable self-assembly of randomly oriented graphene sheets into additive-free, essentially homogenous graphene sponge materials that provide a combination of both cork-like and rubber-like properties. These graphene sponges, with densities similar to air, display Poisson's ratios in all directions that are near-zero and largely strain-independent during reversible compression to giant strains. And at the same time, they function as enthalpic rubbers, which can recover up to 98% compression in air and 90% in liquids, and operate between -196 and 900 degrees C. Furthermore, these sponges provide reversible liquid absorption for hundreds of cycles and then discharge it within seconds, while still providing an effective near-zero Poisson's ratio.