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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >A flexible and highly sensitive capacitive pressure sensor based on conductive fibers with a microporous dielectric for wearable electronics
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A flexible and highly sensitive capacitive pressure sensor based on conductive fibers with a microporous dielectric for wearable electronics

机译：基于导电纤维的柔性且高灵敏度的电容压力传感器，具有可穿戴电子的微孔电介质

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In this study, a flexible and highly sensitive capacitive pressure sensor has been fabricated by coating a microporous polydimethylsiloxane (PDMS) elastomeric dielectric onto conductive fibers. Conductive fibers were prepared by depositing silver nanoparticles (AgNPs) in poly(styrene-block-butadiene-styrene) (SBS) polymer on the surface of Twaron fibers. The configuration obtained by cross-stacking of two microporous PDMS-coated fibers imitates a capacitive sensor, which responds to compressive stress by increasing the contact area and decreasing the separation between the fiber electrodes. Moreover, the gradual closure of micropores under pressure increases the effective permittivity of the dielectric, thereby enhancing the sensitivity of the sensor. A relatively high sensitivity of 0.278 kPa(-1) for a low pressure region (<2 kPa), negligible hysteresis of 6.3%, a dynamic response time in the millisecond range (similar to 340 ms), a low detection limit of 38.82 Pa and an excellent repeatability of over 10 000 cycles were achieved. Finally, the practicality of the sensor was also demonstrated by loading small objects (similar to 9.4 mg) and gentle finger touches (<10 kPa). By virtue of its excellent sensitivity, low pressure detection and cost-effective fabrication process, our sensor is applicable for next-generation advanced touch panels with a more human-friendly interface, non-invasive health monitoring systems, and artificial robot arms.
机译：在该研究中，通过将微孔聚二甲基硅氧烷（PDMS）弹性体电介质涂覆到导电纤维上来制造柔性且高敏感的电容压力传感器。通过在Twaron纤维表面上沉积在聚（苯乙烯 - 嵌段 - 丁二烯 - 苯乙烯）（SBS）聚合物中的银纳米颗粒（AgNP）来制备导电纤维。通过交叉堆叠两种微孔PDMS涂覆的纤维获得的配置模仿电容传感器，其通过增加接触面积并降低光纤电极之间的分离来响应压缩应力。此外，压力下微孔的逐渐闭合增加了电介质的有效介电常数，从而提高了传感器的灵敏度。对于低压区域（<2kPa）的0.278kPa（-1）的相对高的灵敏度，可忽略不计6.3％的滞后，毫秒范围内的动态响应时间（类似于340毫秒），检测限为38.82 pa实现了超过10 000个循环的优异重复性。最后，还通过装载小物体（类似于9.4mg）和温和的手指接触（<10kPa）来证明传感器的实用性。凭借其优异的灵敏度，低压检测和经济高效的制造过程，我们的传感器适用于下一代高级触摸面板，具有更为人性化的界面，无侵入性健康监测系统和人造机器人武器。

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