jp6b13043_si_002.avi (50.33 MB)
Download file

Multivalent Cation Cross-Linking Suppresses Highly Energetic Graphene Oxide’s Flammability

Download (50.33 MB)
media
posted on 21.02.2017, 00:00 authored by Hulusi Turgut, Z. Ryan Tian, Fengjiao Yu, Wuzong Zhou
Graphene oxide (GO), a common intermediate for making graphene-like materials from graphite, was recently found to possess an explosive fire hazard that can jeopardize the GO’s large-scale production and wide applications. This work reports a simple and facile method to cross-link the GO with Al3+ cations, in one step, into a freestanding flexible membrane. This inorganic membrane resists in-air burning on an open flame, at which non-cross-linked GO was burnt out within ∼5 s. All characterization data suggested that the in situ “epoxy ring-opening” reactions on the GO surface facilitated the cross-linking, which elucidated a new mechanism for the generalized inorganic polymerization. With the much improved thermal and water stabilities, the cross-linked GO film can help to advance high-temperature fuel cells, electronic packaging, etc. as one of the long-sought inorganic polymers known to date.

History