包含绝缘微珠的超薄纳米纤维膜，用于高度灵敏的柔性压力传感器。,ACS Applied Materials & Interfaces

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包含绝缘微珠的超薄纳米纤维膜，用于高度灵敏的柔性压力传感器。
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-02-26 , DOI: 10.1021/acsami.0c00448
Taiyu Jin ₁ , Yan Pan ₁ , Guk-Jin Jeon ₁ , Hye-In Yeom ₁ , Shuye Zhang ₂ , Kyung-Wook Paik ₁ , Sang-Hee Ko Park ₁

Affiliation

基于介电膜开发了高度灵敏和灵活的压力传感器，该介电膜由聚偏二氟乙烯（PVDF）纳米纤维中包含的绝缘微珠组成。该膜使用简单的静电纺丝工艺制造。当用作压力传感器时，微珠的存在会提高孔隙率，进而提高膜的灵敏度（在0到1 kPa范围内为1.12 kPa-1）。微珠固定在适当的位置，并且均匀地分布在整个纳米纤维中，从而产生了宽动态范围（最高40 kPa）而没有任何灵敏度损失。蓬松且不粘的PVDF纳米纤维具有低滞后性和超快速响应时间（约10毫秒）。该传感器还展示了在13毫米弯曲半径下的10,000个加载循环和250个弯曲循环中可靠的压力检测。这些压力传感器已成功应用于检测心率和呼吸信号，并制造了一系列传感器并用于识别空间压力分布。本文所述的传感器是超薄且超轻的，包括电极在内的总厚度小于100 µm。构成传感器的所有材料都是柔性的，使其适合于人体应用，例如触觉传感器，电子皮肤和可穿戴医疗设备。

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Ultrathin Nanofibrous Membranes Containing Insulating Microbeads for Highly Sensitive Flexible Pressure Sensors.

Highly sensitive and flexible pressure sensors were developed based on dielectric membranes composed of insulating microbeads contained within polyvinylidene fluoride (PVDF) nanofibers. The membrane is fabricated using a simple electrospinning process. The presence of the microbeads enhances porosity, which in turn enhances the sensitivity (1.12 kPa-1 for the range of 0~1 kPa) of the membrane when used as a pressure sensor. The microbeads are fixed in position and uniformly distributed throughout the nanofibers, resulting in a wide dynamic range (up to 40 kPa) without any sensitivity loss. The fluffy and non-sticky PVDF nanofiber features low hysteresis and ultra-fast response times (~10 ms). The sensor has also demonstrated reliable pressure detection over 10,000 loading cycles and 250 bending cycles at a 13-mm bending radius. These pressure sensors were successfully applied to detect heart rate and respiratory signals, and an array of sensors was fabricated and used to recognize spatial pressure distribution. The sensors described herein are ultrathin and ultralight, with a total thickness of less than 100 µm, including the electrodes. All of the materials comprising the sensors are flexible, making them suitable for on-body applications such as tactile sensors, electronic skins, and wearable healthcare devices.

更新日期：2020-03-06

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