Qi Xue, Lim Sooman
Department of Flexible and Printable Electronics, LANL-JBNU Engineering Institute, Jeonbuk National University, Jeonju 54896, Korea.
Nanomaterials (Basel). 2022 Mar 15;12(6):972. doi: 10.3390/nano12060972.
Wind sensing has become a key component in various fields with the growing trend of assessing air conditions for energy conversion. In this study, we demonstrated a wireless screen-printable flexible strain sensor system based on Ag/MWCNT composite for wind sensing. To achieve high printability with the metal hybrid composite for the fabrication of a screen-printed flexible sensor, we systematically investigated the rheological properties, resulting in the high shear thinning and thixotropic behavior of the composite. After confirming the suitability for screen printing, we investigated the performance of the printed strain sensor, obtaining a gauge factor (G.F.) of 2.08 with 90% sensitivity and high durability after 6000 bending cycles. In addition, the sensor showed 98% temperature sensitivity during a wind sensing test due to the intrinsic properties of the metal hybrid composite. In an application based on an IoT system, we verified that the response of the wireless sensor corresponded with that of a wired sensor, indicating the expansion of low-cost, mass-produced screen-printed wind sensors.
随着评估用于能量转换的空气条件的趋势不断增长，风感测已成为各个领域的关键组成部分。在本研究中，我们展示了一种基于银/多壁碳纳米管复合材料的用于风感测的无线可丝网印刷柔性应变传感器系统。为了使金属混合复合材料具有高可印刷性以制造丝网印刷柔性传感器，我们系统地研究了其流变特性，结果表明该复合材料具有高剪切变稀和触变性。在确认其适用于丝网印刷后，我们研究了印刷应变传感器的性能，获得了2.08的应变片系数（G.F.），灵敏度为90%，并且在6000次弯曲循环后具有高耐久性。此外，由于金属混合复合材料的固有特性，该传感器在风感测测试中显示出98%的温度灵敏度。在基于物联网系统的应用中，我们验证了无线传感器的响应与有线传感器的响应一致，这表明低成本、大规模生产的丝网印刷风传感器具有广阔的应用前景。
