A rapid and stable polymeric humidity sensor is demonstrated using electrospun sulfonated poly (ether ether ketone)/polyvinyl butyral (SPEEK/PVB) composite nanofiber and applied in breath monitoring and non-contact sensing for the first time. First, SPEEK was fabricated into thin film sensor by drip casting and nanofiber sensor by electrospinning, respectively. By comparing the humidity sensing characteristics of the two sensors, it is found that the hysteresis and response/recovery time of the nanofiber humidity sensor have been significantly improved. To further improve its sensing performance, we incorporated different contents of polyvinyl butyral (PVB) to the electrospinning solution to prepare SPEEK/PVB composite nanofiber humidity sensors. The morphology and diameter of nanofibers with different PVB contents were observed by Scanning Electron Microscope. The composite nanofiber humidity sensor exhibited high sensitivity, wide working range of relative humidity, small hysteresis (2.68%), fast response time (<1 s), rapid recovery time (5 s) and stable sensing performance when the ratio of SPEEK to PVB is 1:3. In addition, the breath monitoring and non-contact sensing performance of SPEEK/PVB = 1:3 composite nanofiber humidity sensor was also studied. This work indicates that electrospun SPEEK/PVB nanofibers have good application prospects as humidity sensors for real-time humidity monitoring and non-contact sensing devices.

使用电纺磺化聚（醚醚酮）/聚乙烯醇缩丁醛（SPEEK / PVB）复合纳米纤维证明了一种快速稳定的聚合物湿度传感器，并将其首次应用于呼吸监测和非接触式传感。首先，将SPEEK通过滴铸分别制成薄膜传感器，并将其通过电纺丝制成纳米纤维传感器。通过比较两个传感器的湿度感测特性，发现纳米纤维湿度传感器的磁滞和响应/恢复时间得到了显着改善。为了进一步提高其传感性能，我们将不同含量的聚乙烯醇缩丁醛（PVB）掺入静电纺丝溶液中，以制备SPEEK / PVB复合纳米纤维湿度传感器。用扫描电子显微镜观察了PVB含量不同的纳米纤维的形貌和直径。当SPEEK与PVB的比例变化时，该复合纳米纤维湿度传感器显示出高灵敏度，相对湿度的宽工作范围，滞后现象（2.68％），快速响应时间（<1 s），快速恢复时间（5 s）和稳定的传感性能。是1：3。此外，还研究了SPEEK / PVB = 1：3复合纳米纤维湿度传感器的呼吸监测和非接触式传感性能。这项工作表明静电纺SPEEK / PVB纳米纤维作为实时湿度监测和非接触式传感设备的湿度传感器具有良好的应用前景。当SPEEK与PVB的比例为1：3时，响应时间短（<1 s），恢复时间短（5 s）和稳定的传感性能。此外，还研究了SPEEK / PVB = 1：3复合纳米纤维湿度传感器的呼吸监测和非接触式传感性能。这项工作表明静电纺SPEEK / PVB纳米纤维作为实时湿度监测和非接触式传感设备的湿度传感器具有良好的应用前景。当SPEEK与PVB的比例为1：3时，响应时间短（<1 s），恢复时间短（5 s）和稳定的传感性能。此外，还研究了SPEEK / PVB = 1：3复合纳米纤维湿度传感器的呼吸监测和非接触式传感性能。这项工作表明静电纺SPEEK / PVB纳米纤维作为实时湿度监测和非接触式传感设备的湿度传感器具有良好的应用前景。