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Shape Reconfiguration of a Biomimetic Elastic Membrane with a Switchable Janus Structure

机译：具有可转换的Janus结构的仿生弹性膜的形状重构

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摘要

A method for the fabrication of a biomimetic Janus composite membrane is reported here. This approach is based on a membrane with a vertical gradient crosslinking degree, which is achieved through UV light-induced dimerization of anthracene grafted on poly(styrene-block-butadiene-block-styrene) chains in the presence of carbon nanotubes. UV light penetration is controlled by the accretion of carbon nanotubes to ultimately tailor the heterogeneous crosslinking degree in thickness. This kind of Janus structure is applied here for shape actuation. Here, solvent or shape memory effect-induced shape morphing is obtained via the heterogeneous swelling (deswelling) abilities of, or internal stress from, the Janus structure. By tailoring the UV light irradiation time, the irradiated region and the prestrain, sophisticated and multiple types of shape morphing are programed. In addition, this type of Janus structure can shift back to the homogeneous structure via dedimerization of the anthracene dimers upon thermal treatment, which provides extensive freedom for the design of smart responsive actuators.
机译：这里报道了一种仿生Janus复合膜的制造方法。该方法基于具有垂直梯度交联度的膜，该膜是通过在碳纳米管存在下通过紫外线诱导接枝到聚（苯乙烯-嵌段-丁二烯-苯乙烯-苯乙烯）链上的蒽的二聚化而实现的。紫外线的穿透是通过碳纳米管的增加来控制的，从而最终调整厚度的异质交联度。这种Janus结构在这里用于形状驱动。在这里，溶剂或形状记忆效应引起的形状变形是通过Janus结构的异质膨胀（溶胀）能力或内部应力引起的。通过调整紫外线的照射时间，可以对照射区域和预应变进行编程，从而实现复杂的多种形状变形。此外，这种类型的Janus结构可以在热处理时通过蒽二聚体的去二聚化转变回均质结构，这为智能响应式执行器的设计提供了更大的自由度。

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  • 来源
    《Advanced Functional Materials》 |2018年第29期|1800939.1-1800939.9|共9页
  • 作者

    Bai Jing; Shi Zixing; Yin Jie; Tian Ming; Qu Rongjun;

  • 作者单位

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, State Key Lab Met Matrix Composite Mat, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, State Key Lab Met Matrix Composite Mat, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, State Key Lab Met Matrix Composite Mat, 800 Dongchuan Rd, Shanghai 200240, Peoples R China;

    Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, 15 BeiSanhuan East Rd, Beijing 100029, Peoples R China;

    Ludong Univ, Collaborat Innovat Ctr Shandong Prov High Perform, Sch Chem & Mat Sci, Yantai 264025, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    anthracene; carbon nanotubes; Janus; shape reconfiguration;

    机译：蒽;碳纳米管;角膜;形状重构;

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