Effects of asperities and organic-inorganic interactions on the strength of nacre-mimetic composites

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• 作者：Yoonjoo Lee^a ; Bo-Yeon Kim^a ; Dong-Geun Shin^b ; Soo-Ryong Kim^a ; Woo-Teck Kwon^a ; Younghee Kim^a ; ^{yhkokim@kicet.re.kr}
• 关键词：Bio-inspired ; Nacre-mimetic ; Asperities ; Organic-inorganic interaction ; Fracture toughness ; Alumina-PMMA composites
• 刊名：Materials Science and Engineering: C
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：71
• 期：Complete
• 页码：395-400
• 全文大小：1167 K
• 卷排序：71

文摘

Nacre is a natural organic-inorganic hybrid composite, whose hierarchical structure has a complex influence on its high strength. Many structural features have been discovered, which influence the mechanical properties of nacre, and the authors have a particular interest in the role of the asperities and organic-inorganic interactions. In this study, a composite was prepared which mimics the asperity structure using clay minerals. Organic-inorganic bonding was induced with silane treatment. Both factors increased the yield strength of the composites; however, different deformation behavior was exhibited. It was found that asperities improved the strength of the composite, and that composition influences the stiffness of the composite. The organic-inorganic interaction between the resin and the other components of the composite reduced the deformation of the composite and consequently improved strength.