Simulation studies of internal mechanisms in the static deflection of a cellulose electroactive paper actuator
Simulation studies of internal mechanisms in the static deflection of a cellulose electroactive paper actuator
复制标题
纤维素电活性纸致动器静态偏转内部机制的模拟研究
DOI：
10.1063/1.2891676
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发表时间：
2008
影响因子：
3.2
通讯作者：
J. Hall
中科院分区：
文献类型：
--
作者：
R. Joshi;F. Mbaye;P. Basappa;Sangdong Jang;Joong;J. Hall
对电活性纸EAPap的电压诱导偏转进行了研究。在实验方面，获得了纤维素EAPap致动器的偏置相关挠度和应变、吸水率随时间的函数和相对湿度的测量结果。此外，还进行了模型模拟，以探测和量化导致挠度的各种内部机制的作用。我们的模拟预测结果与EAPap的实测挠度数据吻合良好。该模型表明，内部离子含量及其迁移、导致介电常数不均匀的吸水率、横向压电耦合系数d31、i和弹性模量的随机变化共同导致了EAPap挠度电物理。通过在EAPap处理过程中故意添加离子，可以获得具有最小偏置依赖性的更高灵敏度。©2008美国物理研究所。DOI: 10.1063/1.2891676
Studies of voltage-induced deflections in electroactive paper EAPap have been carried out. On the experimental side, measurements of bias-dependent deflections and strain, water absorption as a function of time, and relative humidity were obtained for the cellulose EAPap actuator. In addition, model simulations have also been carried out to probe and quantify the role of the various internal mechanisms responsible for the deflection. Our simulation predictions yield good agreement with the measured deflection data for the EAPap. The modeling suggests that internal ion content and its migration, water absorption leading to a nonuniform permittivity, random variations in the transverse piezoelectric-coupling coefficient d31,i, and the modulus of elasticity all collectively contribute to the EAPap deflection electrophysics. It also appears that higher sensitivity, with a minimal bias dependence, could be achieved by deliberately adding ions during EAPap processing. © 2008 American Institute of Physics. DOI: 10.1063/1.2891676