Journal
ACS NANO
Volume 9, Issue 2, Pages 2167-2172Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b00119
Keywords
biomineralization; bioinspired materials; hierarchical structure; nacre; nanoasperities
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Funding
- National Basic Research Program of Ministry of Science and Technology of China [2012CB933201]
- National Natural Science Foundation of China [51225306, 51403008]
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Natural nacre with superior mechanical property is generally attributed to the layered brick-and-mortar nanostructure. However, the role of nanograins on the hard aragonite platelets, which is so-called nanoasperity, is rarely addressed. Herein, we prepared silica platelets with aragonite-like nanoasperities via biomineralization strategy and investigated the effects of nanoasperity on the mechanical properties of resulting layered nanocomposites composed of roughened silica platelets and poly(vinyl alcohol). The tensile deformation behavior of the nanocomposites demonstrates that nanograins on silica platelets are responsive for strain hardening, improved strength, and toughness. The structure origin is attributed to the nanoasperity-controlled platelet sliding.
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