Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 91, Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
Department of Nano-manufacturing Technology, Korea Institute of Machinery and Materials, 156, Gajeongbuk-ro, Yuseong-gu, Daejeon, 34103, Republic of Korea.
Adv Healthc Mater. 2021 May;10(9):e2001461. doi: 10.1002/adhm.202001461. Epub 2021 Mar 10.
Conventional flexible pressure sensors are not suitable for high-pressure applications due to their low saturation pressure. In this study, an ultra-wide range pressure sensor is designed based on the optimized microstructure of the polyimide/carbon nanotubes (PI/CNT) nanocomposite film. The sensing range of the pressure sensor is expanded by adopting polyimide (PI) with a high elastic modulus as a matrix material and its sensitivity is improved through functional sensing film with tip-flattened microdome arrays. As a result, the pressure sensor can measure a wide pressure range (≈ 0-3000 kPa) and possesses the sensitivity of ≈ 5.66 × 10 -0.23 × 10 kPa with high reliability and durability up to 1000 cycles. The proposed sensor is integrated into the hand and foot pressure monitoring systems for workout monitoring. The representative values of the pressure distribution in the hands and feet during the powerlifting are acquired and analyzed through Pearson's correlation coefficient (PCC). The analyzed results suggest that the pressure sensor can provide useful real-time information for healthcare and sports performance monitoring.
传统的柔性压力传感器由于饱和压力低，不适合用于高压应用。本研究基于聚酰亚胺/碳纳米管（PI/CNT）纳米复合材料薄膜的优化微观结构，设计了一种超宽范围压力传感器。该压力传感器采用具有高弹性模量的聚酰亚胺（PI）作为基体材料，通过采用具有平头微穹顶阵列的功能感应薄膜来提高其灵敏度，从而扩展了压力传感器的传感范围。结果表明，该压力传感器可测量较宽的压力范围（≈0-3000kPa），具有≈5.66×10-0.23×10kPa 的灵敏度，可靠性和耐用性高达 1000 次循环。所提出的传感器被集成到手和脚压力监测系统中，用于锻炼监测。通过皮尔逊相关系数（PCC）获取和分析了力量举重过程中手和脚的压力分布的代表值。分析结果表明，该压力传感器可为医疗保健和运动表现监测提供有用的实时信息。
