Surface roughness effects on ionic polymer-metal composite (IPMC) sensitivity for compression loads
Surface roughness effects on ionic polymer-metal composite (IPMC) sensitivity for compression loads
复制标题
表面粗糙度对离子聚合物金属复合材料 (IPMC) 压缩载荷敏感性的影响
DOI：
10.1117/12.2613127
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Leang, Kam K.
中科院分区：
文献类型：
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作者：
Nagel, William S.;Hussain, Omar A.;Fakharian, Omid;Aureli, Matteo;Leang, Kam K.
离子聚合物-金属复合材料（IPMC）传感器的柔软性和柔顺性最近被研究用于软机器人和机电一体化设备的各种应用。最近基于物理的化学机电建模结果表明，IPMC不对称表面粗化可以提高压缩下的灵敏度。本文介绍了不同表面不对称粗糙度的IPMC压缩传感器的初步实验结果。粗糙度是通过简单的机械磨砂工艺在基础聚合物材料上产生的，称为“聚合物研磨技术”，然后通过传统的化学镀来产生电极。样品传感器的特点是测量不同压缩载荷下的电压响应。结果表明，与对照样品相比，非对称粗糙化ipmc的传感器灵敏度持续提高。随着电极表面粗糙度的增加，灵敏度呈非单调增加趋势，在53-74微米的磨损下，传感器电极的最大灵敏度约为0.0433 mV/kPa。通过增加电极粗糙度也观察到更多的可变性，这表明IPMC传感器设计具有更大的灵活性。这些结果与现有的基于物理的化学机电模型的预测一致。
The soft and compliant nature of ionic polymer-metal composite (IPMC) sensors has recently been investigated for various applications in soft robotic and mechatronic devices. Recent results of physics-based chemoelectromechanical modeling suggest that IPMC asymmetric surface roughening may enhance the sensitivity under compression. This paper presents initial experimental results on IPMC compression sensors fabricated with varying degrees of asymmetric surface roughness. The roughness is created through a simple mechanical sanding process on the base polymer material, referred to as "polymer abrading technique'", followed by traditional electroless plating to create electrodes. Sample sensors are characterized by measuring the voltage response under different compressive loads. The results show consistently increased sensor sensitivity of the asymmetrically roughened IPMCs versus a control sample. Sensitivity increases non-monotonically with rougher electrode surfaces, where maximum sensitivity of about 0.0433 mV/kPa is achieved with sensor electrodes with 53-74~micrometer abrasions. More variability is also observed through augmented electrode roughness, suggesting greater flexibility for IPMC sensor design. These results align with predictions from the existing physics-based chemoelectromechanical model.