镀银尼龙包缠纱的应变传感与电热性能

Strain sensing and electrothermal performance of silver-plated nylon wrapped yarn

摘要

基于包缠结构的镀银尼龙纱线传感器具有良好的嵌入性,较大的拉伸范围和高灵敏度,既可独立作为传感器,也可集成于织物用于人体运动和生理活动监测。本研究制备了以氨纶为芯纱,镀银尼龙为外层纱的纱线柔性应变传感器,并研究包覆度对其力学、传感以及电热性能的影响。结果表明,当包覆度为480 T/(10 cm)时,包缠纱线的应变传感和电热性能最佳。在拉伸应变为10%时,传感系数高达6.05,其电阻变化率不受拉伸速率的影响,具有出色的重复稳定性。在4.25 V的电压下,其温度高达85.9 ℃。此外,将其嵌入到指套和护腕中,可有效监测手指和手腕的弯曲动作,充分验证了包缠结构的镀银尼龙纱线传感器在人体运动监测的应用潜力。

Abstract

The silver-plated nylon yarn sensor based on wrapping structure has good embedding, large stretching range and high sensitivity, which can be either independently used as a sensor or integrated into the fabric for human movement and physiological activity monitoring. In this study, we prepared yarn flexible strain sensor with spandex as core yarn and silver-plated nylon as outer yarn, and studied the influence of coating on mechanics, sensing and electrothermal properties. Results showed optimal strain sensing and electrothermal performance of wrapped yarn at 480 T/(10 cm). At a tensile strain of 10%, the sensing coefficient is up to 6.05, and the resistance change rate is unaffected by the tensile rate and has excellent repeat stability. And 85.9 ℃ at a voltage of 4.25 V. In addition, it is embedded in the finger sleeve and wrist guard to effectively monitor the bending movements of fingers and wrists, which fully verifies the potential of silver-plated nylon yarn sensor with wrapped structure in human motion monitoring.

关键词

镀银尼龙纱 / 包缠结构 / 应变传感 / 导电性能 / 电热性能

Key words

silver-plated nylon yarn / wrapped structure / strain sensing / conductivity / electrothermal performance

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基金资助

国家自然科学基金青年基金(52503120)