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Biomimetic Cilia-Patterned Rubber Electrode Using Ultra Conductive Polydimethylsiloxane

机译：使用超导电聚二甲基硅氧烷的仿生纤毛图案橡胶电极

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摘要

In this paper, a biomimetic cilia-patterned flexible electrode using ultra conductive polydimethylsiloxane (PDMS) is presented. Due to the flexibility and cilia patterns, the developed electrode can have conformal contact with the human skin without interruptions of hair and rough skin. The conductive PDMS is prepared by mixing PDMS prepolymer and curing agent with Ag particles at different ratios. The performance of the best composite-made ciliated electrode is evaluated under different skin-like physical environments, and compared to the nonciliated flat electrode. For a typical flat electrode, hair and rough surface of the human skin disturb electrical contact, increasing contact impedance, whereas flexible ciliary structures of the proposed electrode show significantly improved conductivity passing through the furs to penetrate well into the gap on the alloyed skin, thus increasing the contact areas. Furthermore, bio-signal measurement using rigid metal electrodes suffers from motion artifacts causing signal errors due to bodily movement, which is remarkably addressed by ciliated flexible electrode. Therefore, the proposed electrode is applied to recording electrocardiography signal and compared with signal measured with conventional metal electrode, which showed about 20% enhancement than that of metal counterpart in identifying electrical activity of heart muscle of a person, as point-of-care clinical applications.
机译：本文提出了一种采用超导聚二甲基硅氧烷（PDMS）的仿生纤毛图案柔性电极。由于柔韧性和纤毛图案，开发的电极可以与人体皮肤保持适形接触，而不会打扰头发和粗糙的皮肤。导电PDMS是通过将PDMS预聚物和固化剂与Ag颗粒以不同比例混合而制备的。在不同的皮肤状物理环境下评估最佳复合材料制成的纤毛电极的性能，并将其与非纤毛扁平电极进行比较。对于典型的扁平电极，头发和人皮肤的粗糙表面会干扰电接触，从而增加接触阻抗，而所建议电极的柔性纤毛结构显示出明显改善的电导率，可通过皮毛很好地渗透到合金化皮肤的缝隙中，因此增加接触面积。此外，使用刚性金属电极的生物信号测量遭受运动伪影的影响，该伪影由于身体运动而引起信号误差，这通过纤毛挠性电极显着解决。因此，该建议的电极被用于记录心电图信号，并与常规金属电极测量的信号进行比较，该信号在鉴定人的心肌电活动方面比金属对应电极增强了约20％，作为即时护理临床应用程序。

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