Polymer Nanosheet Interfaced Bioelectrode for Skin-Inert sEMG Measurement,Advanced Materials Interfaces

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Polymer Nanosheet Interfaced Bioelectrode for Skin-Inert sEMG Measurement
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2021-08-06 , DOI: 10.1002/admi.202100213
Marimo Ito ₁ , Tatsuhiro Horii ₁ , Toshinori Fujie ₁

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The interface between skin and electrodes plays a major role in the accuracy and efficiency of biopotential measurements. For reliable biosignal recording, stable and low-impedance contact is required between electrodes and the target tissue. Conventional wet electrodes (Ag/AgCl) are composed of metal electrodes with skin-adhesive hydrogel. However, for long-term measurement, direct contact between the pre-gel electrode and skin causes discomfort and skin irritation, especially for infants and people with sensitive skin because of the adhesiveness of the hydrogel. In this study, a low-adhesive electrode is reported by exploiting a free-standing polymeric ultra-thin film (referred to as a “nanosheet”) as an intermediate layer at the backside of the electrode, which reduces the adhesiveness of the pre-gel electrode while allowing for surface electromyogram (sEMG) measurement. Intermediate layer of the nanosheet made from polystyrene–polybutadiene–polystyrene triblock copolymer (SBS), polystyrene (PS) or polydimethylsiloxane (PDMS) is prepared using the roll-to-roll gravure coating method. The thickness of each nanosheet is varied from hundreds to thousands of nanometers, and the effect on the electrode performance is evaluated. The nanosheet-modified electrodes with low adhesiveness are applied to human skin, which shows a good performance to detect sEMG signals of the forearm in a skin-friendly manner.

中文翻译：

用于皮肤惰性 sEMG 测量的聚合物纳米片界面生物电极

皮肤和电极之间的界面在生物电势测量的准确性和效率方面起着重要作用。为了获得可靠的生物信号记录，电极和目标组织之间需要稳定且低阻抗的接触。传统的湿电极 (Ag/AgCl) 由带有皮肤粘附水凝胶的金属电极组成。然而，对于长期测量，预凝胶电极与皮肤的直接接触会引起不适和皮肤刺激，特别是对于婴儿和皮肤敏感的人，因为水凝胶的粘性。在这项研究中，通过利用独立的聚合物超薄膜（称为“纳米片”）作为电极背面的中间层，报道了一种低粘性电极，这降低了预凝胶电极的粘附性，同时允许进行表面肌电图 (sEMG) 测量。由聚苯乙烯-聚丁二烯-聚苯乙烯三嵌段共聚物 (SBS)、聚苯乙烯 (PS) 或聚二甲基硅氧烷 (PDMS) 制成的纳米片的中间层使用卷对卷凹版印刷涂布法制备。每个纳米片的厚度从数百到数千纳米不等，并评估对电极性能的影响。将具有低粘附性的纳米片修饰电极应用于人体皮肤，以对皮肤友好的方式检测前臂的sEMG信号显示出良好的性能。聚苯乙烯 (PS) 或聚二甲基硅氧烷 (PDMS) 是使用卷对卷凹版涂布方法制备的。每个纳米片的厚度从数百到数千纳米不等，并评估对电极性能的影响。将具有低粘附性的纳米片修饰电极应用于人体皮肤，以对皮肤友好的方式检测前臂的sEMG信号显示出良好的性能。聚苯乙烯 (PS) 或聚二甲基硅氧烷 (PDMS) 是使用卷对卷凹版涂布方法制备的。每个纳米片的厚度从数百到数千纳米不等，并评估对电极性能的影响。将具有低粘附性的纳米片修饰电极应用于人体皮肤，以对皮肤友好的方式检测前臂的sEMG信号显示出良好的性能。

更新日期：2021-09-12

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