Temporal change in the electromechanical properties of dielectric elastomer minimum energy structures
Temporal change in the electromechanical properties of dielectric elastomer minimum energy structures
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DOI：
10.1063/1.4880155
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发表时间：
2014-06
影响因子：
3.2
通讯作者：
G. Buchberger;B. Hauser;J. Schoeftner;S. Bauer;B. Jakoby;W. Hilber
中科院分区：
文献类型：
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作者：
G. Buchberger;B. Hauser;J. Schoeftner;S. Bauer;B. Jakoby;W. Hilber
介电弹性体最小能量结构（DEMES）是具有消费品潜力的软电子换能器和能量采集器。它们的机电特性随时间的变化对于工程任务是非常重要的。因此，我们研究丙烯酸DEMES的阻抗谱和光学方法的总时间约为。4.5个月我们应用仅来自炭黑颗粒的顺应性电极或来自炭黑颗粒和硅油的混合物的流体电极。从测量数据中，获得了换能器的等效串联电容和电阻以及换能器的弯曲角度。我们发现，等效串联电容的平均变化范围为− 12%/1000 h至− 4.0%/1000 h，而弯曲角则线性减小，斜率范围为− 15%/1000 h至− 7%/1000 h。初始弯曲角较大的换能器和炭黑电极的机电特性变化最小。
Dielectric elastomer minimum energy structures (DEMES) are soft electronic transducers and energy harvesters with potential for consumer goods. The temporal change in their electromechanical properties is of major importance for engineering tasks. Therefore, we study acrylic DEMES by impedance spectroscopy and by optical methods for a total time period of approx. 4.5 months. We apply either compliant electrodes from carbon black particles only or fluid electrodes from a mixture of carbon black particles and silicone oil. From the measurement data, the equivalent series capacitances and resistances as well as the bending angles of the transducers are obtained. We find that the equivalent series capacitances change in average between −12 %/1000 h and −4.0 %/1000 h, while the bending angles decrease linearly with slopes ranging from −15 %/1000 h to −7 %/1000 h. Transducers with high initial bending angles and electrodes from carbon black particles show the smallest changes of the electromechanical characteri...