Cao Tianci, Liu Xianqiang, Cheng Xiaopeng, Li Yonghe, Sang Lijun, Ma Jinyao, Wang Jin, He Jiachuo, Wang Mingming, Zhang Yuefei
Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology Beijing 100124 PR China
RSC Adv. 2019 Feb 6;9(8):4609-4615. doi: 10.1039/c8ra09818b. eCollection 2019 Jan 30.
With more and more applications, the mechanical strength of graphene paper (GP) has attracted significant attention in recent years. In this report, GPs were prepared by flow-induced filtration of electrochemical exfoliated graphene sheets. By adjusting the concentration of solution, we found graphene sheets fabricated in 0.1 M KSO have the thinnest average thickness. And by uniaxial in-plane tensile tests operated on a self-developed scanning electron microscopy (SEM) tensile stage, the corresponding GP has the best fracture strength of 192 MPa. This is due to that the thickness decrease of exfoliated graphene will increase the quantity of interlayer crosslinks, thus improving the mechanical properties of GPs. This research may open a new way to obtain high-strength GPs for applications.
随着应用越来越多，近年来石墨烯纸（GP）的机械强度受到了广泛关注。在本报告中，通过电化学剥离石墨烯片的流动诱导过滤制备了石墨烯纸。通过调节溶液浓度，我们发现，在0.1 M KSO中制备的石墨烯片平均厚度最薄。并且，通过在自行研制的扫描电子显微镜（SEM）拉伸台上进行的单轴面内拉伸试验，相应的石墨烯纸具有192 MPa的最佳断裂强度。这是因为剥离石墨烯的厚度减小会增加层间交联的数量，从而提高石墨烯纸的机械性能。本研究可能为获得高强度石墨烯纸用于实际应用开辟一条新途径。
