Journal
NANO LETTERS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c04747
Keywords
2D COF; impact resistance; energy dissipation mechanism; fracture mechanism; MD simulation
Ask authors/readers for more resources
By molecular dynamics simulation, the ultralight monolayer covalent organic framework (COF), a novel 2D crystalline polymer, was found to possess superior impact resistant capability under high-velocity impact. The hexagonal nanopores integrated by polymer chains show large deformation compatibility and effectively restrain crack propagation, enabling COF to resist multiple impacts.
Exploring and designing two-dimensional (2D) nanomaterials for armor-piercing protection has become a research focus. Here, by molecular dynamics simulation, we revealed that the ultralight monolayer covalent organic framework (COF), one kind of novel 2D crystalline polymer, possesses superior impact resistant capability under high-velocity impact. The calculated specific penetration energy is much higher than that of other traditional impact-resistant materials, such as steel, poly(methyl methacrylate), Kevlar, etc. It was found that the hexagonal nanopores integrated by polymer chains have large deformation compatibility resulting from flexible torsion and stretching, which can remarkably contribute to the energy dissipation. In addition, the deformable nanopores can effectively restrain the crack propagation, enable COF to resist multiple impacts. This work uncovers the extreme dynamic responses of COF under high velocity impact and provides theoretical guidance for designing superstrong 2D polymer-based crystalline nanomaterials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available