Structural Design and DLP 3D Printing Preparation of High Strain Stable Flexible Pressure Sensors.
Structural Design and DLP 3D Printing Preparation of High Strain Stable Flexible Pressure Sensors.
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高应变稳定柔性压力传感器的结构设计与DLP 3D打印制备
DOI：
10.1002/advs.202304409
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发表时间：
2023-11
期刊：
影响因子：
15.1
通讯作者：
Xiangling Xia;Ziyin Xiang;Zhiyi Gao;Siqi Hu;Wuxu Zhang;Ren Long;Yi Du;Yiwei Liu;
中科院分区：
文献类型：
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作者：
Xiangling Xia;Ziyin Xiang;Zhiyi Gao;Siqi Hu;Wuxu Zhang;Ren Long;Yi Du;Yiwei Liu;
柔性压力传感器由于其可拉伸性、高灵敏度和易于集成等特点，在可穿戴电子、机器人等领域中是至关重要的力敏器件。然而，现有压力传感器的局限性在于它们在经受拉伸时降低的感测精度。本研究针对这一问题，采用有限元仿真优化，利用数字光处理（DLP）3D打印技术设计并制作柔性压力传感器的力敏结构。这是第一次系统地研究力敏结构如何增强柔性电阻式压力传感器的拉伸应变稳定性。对18种力敏结构进行了有限元设计，同时，力敏结构的弹性模量对传感器的整体拉伸稳定性有重要影响。基于模拟结果，一个良好的设计和高度拉伸稳定的柔性电阻压力传感器已被制造，表现出0.76%的电阻变化率和压力灵敏度的变化率为0.22%，当受到应变范围从没有拉伸应变到20%的拉伸应变，表现出极低的拉伸响应特性。这项研究为设计和制造柔性电阻式压力传感器提供了创新的解决方案，即使在拉伸条件下也能保持稳定的传感性能。
Flexible pressure sensors are crucial force-sensitive devices in wearable electronics, robotics, and other fields due to their stretchability, high sensitivity, and easy integration. However, a limitation of existing pressure sensors is their reduced sensing accuracy when subjected to stretching. This study addresses this issue by adopting finite element simulation optimization, using digital light processing (DLP) 3D printing technology to design and fabricate the force-sensitive structure of flexible pressure sensors. This is the first systematic study of how force-sensitive structures enhance tensile strain stability of flexible resistive pressure sensors. 18 types of force-sensitive structures have been investigated by finite element design, simultaneously, the modulus of the force-sensitive structure is also a critical consideration as it exerts a significant influence on the overall tensile stability of the sensor. Based on simulation results, a well-designed and highly stretch-stable flexible resistive pressure sensor has been fabricated which exhibits a resistance change rate of 0.76% and pressure sensitivity change rate of 0.22% when subjected to strains ranging from no tensile strain to 20% tensile strain, demonstrating extremely low stretching response characteristics. This study presents innovative solutions for designing and fabricating flexible resistive pressure sensors that maintain stable sensing performance even under stretch conditions.