Unveiling the thickness-dependent mechanical properties of graphene papers by in situ SEM tension. Issue 8 (6th February 2019)

• Record Type: Journal Article
• Authors: Cao, Tianci; Liu, Xianqiang; Cheng, Xiaopeng; Li, Yonghe; Sang, Lijun; Ma, Jinyao; Wang, Jin; He, Jiachuo; Wang, Mingming; Zhang, Yuefei
• Is Part Of: RSC advances. Volume 9:Issue 8(2019)
• Page Start: 4609
• Page End: 4615
• Publication Date: 2019-02-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra09818b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : We prepared graphene paper (GP) using graphene sheets of different thickness. The fracture strength of the GP was assessed by uniaxial in-plane tensile tests using an in situ scanning electron microscope. Abstract : 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 K2 SO4 have the thinnest average thickness. And by uniaxial in-plane tensile tests operated on a self-developed in situ 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.