nn7b08671_si_001.pdf (5.6 MB)
Bioinspired Interfacial Chelating-like Reinforcement Strategy toward Mechanically Enhanced Lamellar Materials
journal contribution
posted on 2018-04-26, 00:00 authored by Ke Chen, Shuhao Zhang, Anran Li, Xuke Tang, Lidong Li, Lin GuoMany biological organisms
usually derived from the ordered assembly
of heterogeneous, hierarchical inorganic/organic constituents exhibit
outstanding mechanical integration, but have proven to be difficult
to produce the combination of excellent mechanical properties, such
as strength, toughness, and light weight, by merely mimicking their
component and structural characteristics. Herein, inspired by biologically
strong chelating interactions of phytic acid (PA) or IP6 in many biomaterials,
we present a biologically interfacial chelating-like reinforcement
(BICR) strategy for fabrication of a highly dense ordered “brick-and-mortar”
microstructure by incorporating tiny amounts of a natural chelating
agent (e.g., PA) into the interface
or the interlamination of a material (e.g., graphene oxide (GO)), which shows joint improvement in hardness
(∼41.0%), strength (∼124.1%), maximum Young’s
modulus (∼134.7%), and toughness (∼118.5%) in the natural
environment. Besides, for different composite matrix systems and artificial
chelating agents, the BICR strategy has been proven successful for
greatly enhancing their mechanical properties, which is superior to
many previous reinforcing approaches. This point can be mainly attributed
to the stronger noncovalent cross-linking interactions such as dense
hydrogen bonds between the richer phosphate (hydroxyl) groups on its
cyclohexanehexol ring and active sites of GO, giving rise to the larger
energy dissipation at its hybrid interfaces. It is also simple and
environmentally friendly for further scale-up fabrication and can
be readily extended to other material systems, which opens an advanced
reinforcement route to construct structural materials with high mechanical
performance in an efficient way for practical applications.
History
Usage metrics
Categories
Keywords
cyclohexanehexol ringBICR strategychelating-like reinforcementmaterial systemsMechanically Enhanced Lamellar MaterialsIP 6light weightenergy dissipationmatrix systemsPAchelating agentinterfacechelating interactionsphytic acidreinforcement routetoughnessscale-up fabricationBioinspired Interfacial Chelating-like Reinforcement Strategystrengthhydrogen bondschelating agentsnoncovalent cross-linking interactions