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Biomimetic Carbon Nanotube Films with Gradient Structure and Locally Tunable Mechanical Property

机译：具有梯度结构和局部可调机械性能的仿生碳纳米管薄膜

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摘要

Naturally existing materials often acquire unique functions by adopting a gradient structure with gradual change in their microstructure and related properties. Imparting such an elegant structural control into synthetic materials has been a grand challenge in the field. Here, the concept of gradient structure into macroscopic carbon nanotube (CNT) films is employed and the CNT arrangement from well-aligned array to completely random distribution, in a continuous and smooth way, is changed. Gradient films with tailored aligned-to- random transition rate or multilevel hierarchical structures with repeated transition have been fabricated. Local deformation and mechanical properties are directly related to the arrangement of CNTs and can be tailored by Herman's orientation factor; in particular, the elastic modulus and stiffness span over several orders of magnitude from aligned to random regions within a single monolithic film. Controlled synthesis of macroscopic CNT gradient structures with tunable mechanical properties opens a potential route toward manufacturing biomimetic functional materials with locally optimized design.
机译：天然存在的材料通常通过采用梯度结构来获得独特的功能，这些梯度结构的微观结构和相关特性会逐渐变化。在合成材料中加入如此优雅的结构控制一直是该领域的巨大挑战。这里，采用了梯度结构到宏观碳纳米管（CNT）膜中的概念，并且以连续且平滑的方式改变了从良好排列的阵列到完全随机分布的CNT排列。已经制造出具有定制的从对准到随机的跃迁速率的梯度膜或具有重复跃迁的多层结构。局部变形和机械性能与CNT的排列直接相关，可以通过Herman的取向因子进行调整；特别地，弹性模量和刚度从单个整体膜内的对准区域到随机区域跨越几个数量级。具有可调节机械性能的宏观CNT梯度结构的受控合成为制造具有局部优化设计的仿生功能材料开辟了一条潜在途径。

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  • 来源
    《Advanced Functional Materials》 |2015年第46期|7173-7179|共7页
  • 作者

    Lin Zhiqiang; Gui Xuchun; Zeng Zhiping; Liang Binghao; Chen Wenjun; Liu Ming; Zhu Yuan; Cao Anyuan; Tang Zikang;

  • 作者单位

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China;

    Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;

    Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China|Univ Macau, Inst Appl Phys & Mat Engn, Taipa, Macau, Peoples R China;

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