期刊
ACS NANO
卷 9, 期 2, 页码 2167-2172出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b00119
关键词
biomineralization; bioinspired materials; hierarchical structure; nacre; nanoasperities
类别
资金
- National Basic Research Program of Ministry of Science and Technology of China [2012CB933201]
- National Natural Science Foundation of China [51225306, 51403008]
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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