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Origin of large field-induced strain of azobenzene/polyurethane blend dielectric elastomers

机译：偶氮苯诱导的偶氮菌/聚氨酯共混介电弹性体的起源

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摘要

Herein a diaphragm type dielectric elastomer actuator by blending azobenzene dyes into a polyurethane matrix (Azo/PU) is described. The effects of azobenzene content on the dielectric, mechanical, and electromechanical properties of the Azo/PU blends are discussed. The resultant blends with azobenzene content ranging from 1 to 8 wt% were characterized. The dielectric permittivity of PU increased from 8.0 to 11.1 (increasing of 38.5%) at 1 wt% azo content and reached a maximum of 35.6 (increasing of 343%) at 4 wt% azo content. By blending with a small content of azo the dielectric breakdown strength reached 57 kV mm(-1), which is 86% higher than that of the neat PU. The 30 mm thick diaphragm of Azo/PU blend with 1 wt% azo content exhibited the highest actuated displacement at the center around 700 mm. Meanwhile the neat PU gave a displacement of 25 mm. That is a 26-fold increase in actuation is obtained by blending only 1 wt% azo dyes into the PU matrix. Infrared spectroscopy was used to characterize the structure of the Azo/PU blends. The particular chemical structure the Azo/PU blend containing 1 wt% of azo dyes is proposed to be responsible for the improvement in electromechanical actuation.
机译：这里描述了通过将偶氮苯染料混合到聚氨酯基质（AZO / PU）中的膜片型介电弹性体致动器。讨论了偶氮苯含量对偶氮/ PU混合物的电介质，机械和机电性质的影响。具有从1至8wt％的偶氮苯含量的所得混合物进行了表征。 PU的介电常数从8.0至11.1（38.5％增加38.5％），在4wt％的偶氮含量达到35.6（343％的增加343％）。通过将少量偶氮混合，介电击穿强度达到57 kV mm（-1），其比整洁PU高86％。偶氮/ PU混合物的30mm厚隔膜，具有1wt％的偶氮含量，中心在700mm的中心致动最高的致动位移。同时，整洁的PU给出了25毫米的位移。这是致动的26倍的增加，通过将1wt％的偶氮染料混合到PU基质中获得。红外光谱法用于表征AZO / PU混合物的结构。特定的化学结构含有1wt％的偶氮染料的Azo / Pu混合物被提出负责改善机电致动。

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  • 来源
    《RSC Advances》 |2015年第100期|共12页
  • 作者

    Renard Christophe; Wang Dongrui; Han Bao-Zhong; Dang Zhi-Min;

  • 作者单位

    Univ Sci &

    Technol Beijing Sch Chem &

    Biol Engn Dept Polymer Sci &

    Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Chem &

    Biol Engn Dept Polymer Sci &

    Engn Beijing 100083 Peoples R China;

    Harbin Univ Sci &

    Technol Key Lab Engn Dielectr &

    Its Applicat Harbin 150080 Peoples R China;

    Univ Sci &

    Technol Beijing Sch Chem &

    Biol Engn Dept Polymer Sci &

    Engn Beijing 100083 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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