MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou, P. R. China.
Sci Rep. 2013;3:2374. doi: 10.1038/srep02374.
Materials with both high strength and toughness are in great demand for a wide range of applications, requiring strict design of ingredients and hierarchically ordered architecture from nano- to macro-scale. Nacre achieves such a target in the long natural evolution by alternative alignment of inorganic nanoplatelets and biomacromolecules. To mimic nacre, various strategies were developed, approaching nacre-comparable performance in limited size. How to remarkably exceed nacre in both property and size is a key issue to further the advancement of composites. Here we present liquid crystal self-templating methodology to make the next generation of ultrastrong and tough nacre-mimics continuously. The hierarchically assembled composites show the highest tensile strength (652 MPa) among nacre mimics, five to eight times as high as that of nacre (80-135 MPa), and excellent ductility with toughness of 18 MJ m(-3), one to two orders of magnitude greater than that of nacre (0.1 ~ 1.8 MJ m(-3)).
具有高强度和韧性的材料在广泛的应用中需求量很大，这需要从纳米到宏观尺度对成分进行严格设计，并对层次结构进行有序构建。珍珠母在长期的自然进化过程中通过无机纳米板和生物大分子的交替排列实现了这一目标。为了模仿珍珠母，人们开发了各种策略，在有限的尺寸范围内达到了与珍珠母相当的性能。如何在性能和尺寸上显著超过珍珠母是进一步推进复合材料发展的关键问题。在这里，我们提出了液晶自模板方法来连续制造下一代超高强韧珍珠母仿生材料。这种分层组装的复合材料表现出最高的拉伸强度（652 MPa），是珍珠母（80-135 MPa）的五到八倍，并且具有优异的延展性，韧性为 18 MJ m(-3)，比珍珠母（0.1 ~ 1.8 MJ m(-3)）高出一到两个数量级。
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