Highly Sensitive Flexible Pressure Sensors with Hybrid Microstructures Similar to Volcano Sponge,ACS Applied Materials & Interfaces

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Highly Sensitive Flexible Pressure Sensors with Hybrid Microstructures Similar to Volcano Sponge
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-11-15 , DOI: 10.1021/acsami.3c14281
Yilin Zhao ₁ , Xiao Lei ₁ , Ziran Zeng ₁ , Dingyi Guo ₁ , Yunfan Li ₁ , Rui Ma ₁ , Shengnan Shen ₁ , Feng Liu _{1,

2}

Affiliation

Preparing hybrid microstructures on flexible substrates is a crucial approach to achieving highly sensitive flexible pressure sensors. However, the preparation of hybrid microstructures on soft materials often faces complex, time-consuming, and costly problems, which hampers the advancement of highly sensitive flexible sensors. Herein, based on a 3D-printing template and a household microwave oven, a simple, green, and one-step microwave irradiation process using glucose porogen is applied to develop a flexible pressure sensor with a volcano-sponge-like porous dome structure based on porous polydimethylsiloxane (PDMS). Due to the easily deformable porous dome on the porous PDMS substrate, the flexible pressure sensor showcases exceptional sensitivity of 611.85 kPa^–1 in 0–1 and 50.31 kPa^–1 over a wide range of 20–80 kPa. Additionally, the sensor takes only 43 ms to respond, 123 ms to recover, and presents excellent stability (>1100 cycles). In application testing, the sensor effectively captures pulse signals, speech signals, tactile signals from a mechanical gripper, and gesture signals, demonstrating its potential applications in medical diagnosis and robotics. In conclusion, the microwave irradiation method based on template and glucose porogen provides a new way for the simple, low-cost, and green preparation of porous-surface hybrid microstructures on polymers and high-performance flexible pressure sensors.

中文翻译：

具有类似于火山海绵的混合微结构的高灵敏度柔性压力传感器

在柔性基底上制备混合微结构是实现高灵敏度柔性压力传感器的关键方法。然而，在软材料上制备混合微结构往往面临复杂、耗时和昂贵的问题，这阻碍了高灵敏度柔性传感器的进步。在此，基于3D打印模板和家用微波炉，采用葡萄糖致孔剂的简单、绿色、一步式微波辐照工艺，开发了一种具有火山海绵状多孔圆顶结构的柔性压力传感器。多孔聚二甲基硅氧烷（PDMS）。由于多孔 PDMS 基底上易于变形的多孔圆顶，柔性压力传感器在 0-1 范围内表现出 611.85 kPa ^–1的卓越灵敏度，在 20-80 kPa 的宽范围内表现出50.31 kPa ^{–1的卓越灵敏度。}此外，该传感器只需 43 毫秒即可响应，123 毫秒即可恢复，并具有出色的稳定性（>1100 次循环）。在应用测试中，该传感器有效地捕获脉冲信号、语音信号、机械抓手的触觉信号和手势信号，展示了其在医疗诊断和机器人技术中的潜在应用。总之，基于模板和葡萄糖致孔剂的微波辐射方法为简单、低成本、绿色制备聚合物多孔表面杂化微结构和高性能柔性压力传感器提供了一条新途径。

更新日期：2023-11-15

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