Abstract Conductive carbon nanotube-thermoplastic polyurethane (CNT-TPU) composite thin films are patterned and integrated onto knitted textile substrates to form electronic textile (E-Textile) dry electrodes. Vertically aligned CNT arrays are mechanically drawn into thin CNT sheets and infiltrated with a TPU solution to form the CNT-TPU thin films. The CNT-TPU thin films are then heat laminated onto knitted textile substrates to form dry E-Textile electrodes. To understand the wearability of our CNT-TPU thin films we perform an in-depth analysis of the films’ electromechanical properties, electrical impedance, and electrocardiogram (ECG) sensing performance. The electromechanical coupling between the CNT thin films and knitted textile substrates show a strong anisotropic dependence between the CNT film alignment and textile knit structure. Further analysis into the CNT thin films reveal that larger electrode sizes with a larger number of CNT sheet layers in the film, lead to more favorable impedance behaviors and ECG sensing capabilities. As a wearable demonstration, we fabricate a textile arm sleeve integrated with CNT thin film electrodes to form an ECG sensing E-Textile system. The proposed E-Textile sleeve demonstrates the practicality of our CNT thin films and show promise for other E-Textile and wearable applications.

中文翻译：

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用于生物传感电子纺织品应用的碳纳米管 (CNT) 薄膜

摘要 将导电碳纳米管-热塑性聚氨酯 (CNT-TPU) 复合薄膜图案化并集成到针织纺织品基材上，形成电子纺织品 (E-Textile) 干电极。垂直排列的 CNT 阵列被机械拉伸成薄的 CNT 片并用 TPU 溶液渗透以形成 CNT-TPU 薄膜。然后将 CNT-TPU 薄膜热层压到针织纺织品基材上以形成干燥的 E-Textile 电极。为了了解我们的 CNT-TPU 薄膜的耐磨性，我们对薄膜的机电特性、电阻抗和心电图 (ECG) 传感性能进行了深入分析。碳纳米管薄膜和针织纺织基材之间的机电耦合显示碳纳米管薄膜排列和纺织针织结构之间的强各向异性依赖性。对 CNT 薄膜的进一步分析表明，在薄膜中具有更多 CNT 片层的更大电极尺寸会导致更有利的阻抗行为和 ECG 传感能力。作为可穿戴演示，我们制造了与 CNT 薄膜电极集成的纺织臂套，以形成 ECG 传感 E-Textile 系统。拟议的 E-Textile 套管展示了我们的 CNT 薄膜的实用性，并为其他 E-Textile 和可穿戴应用带来了希望。