PDMS-ZnO flexible piezoelectric composites for measurement of muscle activity
PDMS-ZnO flexible piezoelectric composites for measurement of muscle activity
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DOI：
10.1007/s12034-020-02202-7
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发表时间：
2020-08-13
影响因子：
1.8
通讯作者：
Kulkarni, S. M.
中科院分区：
文献类型：
--
作者：
Jugade, S. S.;Kulkarni, S. M.
肌肉活动的测量对于肌肉健康监测、生物力学研究、假肢开发等具有重要意义。本文介绍了一种柔性压电复合材料作为测量肌肉活动的传感元件。所研制的压电材料是聚二甲基硅氧烷和氧化锌的复合材料，存在单层和双层结构。为了测试弯曲模式下的压电性能，将复合材料贴片附着在悬臂梁装置上。当ZnO质量分数为30%时，复合材料由于振动悬臂梁产生的峰值正弦电压最高（1.5 V）。在轴向模式下的测试中，对于含有30% wt% ZnO的复合材料的单层结构，材料由于脉冲负载产生的峰值输出电压为最大（0.9 V）。传感器由双层复合贴片组成，包裹在特定肌肉上以测量其活动。测量传感器输出电压的变化，以增加负载，然后将其映射到使用硬度计测量的肌肉的弹性模量的相应值。肱二头肌和腕屈肌肌活动测量灵敏度分别为3.826 V MPa-1和1.245 V MPa-1。
Measurement of muscle activity is important for muscle health monitoring, biomechanics studies, developing prosthesis, etc. This article describes a flexible piezoelectric composite material as a sensing element for measuring muscle activity. The developed piezoelectric material is a composite of polydimethylsiloxane and zinc oxide, and exists in monolayer and bilayer configurations. To test the piezoelectric properties in bending mode, a composite patch is attached to a cantilever beam setup. Peak sinusoidal voltage generated from the composite material due to the vibrating cantilever is found to be highest (1.5 V) for bilayer configuration with 30 wt% ZnO. For testing in axial mode, the peak output voltage from the material due to an impulse load is maximum (0.9 V) for the monolayer configuration of the composite with 30 wt% ZnO. The sensor consisting of a bilayer composite patch is wrapped around a specific muscle to measure its activity. The change in output voltage from the sensor is measured for increasing load and is then mapped to the corresponding value of elastic modulus of the muscle measured using a durometer. The sensitivity of the muscle activity measurement for biceps brachii and flexor carpi is found to be 3.826 and 1.245 V MPa-1, respectively.