Improvement of actuation performance of dielectric elastomers by barium titanate and carbon black fillers
Improvement of actuation performance of dielectric elastomers by barium titanate and carbon black fillers
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DOI：
10.1002/app.44116
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发表时间：
2016-11-10
影响因子：
3
通讯作者：
Vuorinen, Jyrki
中科院分区：
文献类型：
--
作者：
Poikelispaa, Minna;Shakun, Alexandra;Vuorinen, Jyrki
介电弹性体是一种很有前途的类似人体肌肉的致动器材料。在弹性体中，丙烯酸橡胶（ACM）表现出良好的驱动性能，但其使用受到所需高工作电压的限制。目前的研究表明，纳米结构的炭黑和介电填料的同时掺入提供了介电常数的增加和弹性体矩阵的适当模量，从而提高了在低电压下的机电驱动性能。通过在丙烯酸弹性体基体中加入增强炭黑和钛酸钡，实现了介电常数提高6倍。通过合理选择软橡胶基体中不同的填料浓度，可以对驱动应力和驱动应变进行微调。最后，观察到填料在改善所开发材料的驱动性能方面的协同效应。这项工作可能为设计用于致动器制造的介电弹性体铺平道路。(c) 2016 Wiley Periodicals, Inc.；j:。变异较大。自然科学学报，2016,33(4):444 - 444。
Dielectric elastomers are promising materials for actuators resembling human muscle. Among elastomers, acrylic rubbers (ACM) have shown good actuation performance but its use is limited by the high operating voltages required. The present work demonstrates that simultaneous incorporation of nanostructured carbon black and dielectric fillers offers an increase in a dielectric permittivity and a suitable modulus of the elastomers matrix, enabling an improved electro-mechanical actuation performance at low voltages. By the use of reinforcing carbon black and barium titanate in an acrylic elastomer matrix a sixfold increase in the dielectric permittivity was realized. A fine tuning of the actuation stress and, consequently, actuation strain can be done by a judicial selection of the different filler concentrations in the soft rubber matrix. Finally, a synergistic effect of the fillers was observed in the improved actuation performance of the developed materials. This work may pave the way to design dielectric elastomers for actuator fabrication. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44116.