电容感应
灵敏度(控制系统)
材料科学
航程(航空)
纳米技术
3D打印
光电子学
电气工程
复合材料
电子工程
工程类
作者
Qingxin Jin,Chengyun Wang,Wei Han,Xiang Liu,Jiaqi Li,Guangmeng Ma,Lihua Yu,Chunyi Luo,Fan Guo,Lihua Yu
标识
DOI:10.1002/marc.202300668
摘要
Abstract Flexible pressure sensors have drawn considerable attention for their potential applications as electronic skins with both sensitivity and pressure response range. Although the introduction of surface microstructures effectively enhances sensitivity, the confined volume of their compressible structures results in a limited pressure response range. To address this issue, a biomimetic kapok structure is proposed and implemented for constructing the dielectric layer of flexible capacitive pressure sensors employing 3D printing technology. The structure is designed with easily deformable concave and rotational structures, enabling continuous deformation under pressure. This design results in a significant expansion of the pressure response range and improvement in sensitivity. Further, the study purposively analyses crucial parameters of the devised structure that affect its compressibility and stability. These include the concave angle θ , height ratio d 1 /d 2 , rotation angle α , and width k . As a result, the ultimate pressure sensors demonstrate remarkable features such as high sensitivity (≈2.38 kPa −1 in the range of 0–10 kPa), broad detection range (734 kPa), fast response time (23 ms), and outstanding pressure resolution (0.4% at 500 kPa). This study confirms the viability of bionic structures for flexible sensors, and their potential to expand the scope of wearable electronic devices.
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