面向工业过程控制的低成本、高稳定交联聚电解质基湿度传感器的研究

对工业过程各个流程的空气湿度进行精准测量和控制至关重要。工业过程环境复杂，且需多节点监控，急需开发成本低、稳定性好的湿度传感器。阻抗型聚合物湿度传感器能满足工业过程控制的基本需求，但是目前常用的聚电解质基湿度传感器稳定性不够理想。本项目从提高湿度传感器的稳定性出发，提出在电极上原位制备交联聚电解质敏感膜和保护膜的新策略。利用高选择性及反应活性的点击化学反应制备交联聚电解质敏感膜，提高敏感材料的稳定性和一致性；在敏感膜上再次利用点击反应制备具有介/微孔结构的保护膜，保证水分子正常通过而将大颗粒污染物隔离；结合温度补偿、故障诊断等智能化方法，最终获得高稳定湿度传感器。本项目的实施将为工业过程湿度控制提供核心器件，推进原位制备交联聚合物在湿度传感领域的应用，研制出满足实际检测和控制需求的低成本、高稳定的阻抗型湿度传感器。

It is important to accurately measure and control the air humidity in each process of the industrial processes. Because of the complicated environment and the requirements for multi-node monitoring, humidity sensors with low cost and good stability are urgently needed. Impedance-type polymer humidity sensors can meet the basic needs of industrial process control, but the stability of the commonly used polyelectrolyte-based humidity sensors are not ideal. To improve the stability of humidity sensors, new strategies for preparing in situ cross-linked polyelectrolyte sensitive film and protective film are proposed. The cross-linked polyelectrolyte sensitive film will be prepared by click chemistry reaction with high selectivity and reactivity, which can improve the stability and consistency of the sensitive materials. The meso/micro-porous protective film will also be prepared by click chemistry reaction on the sensitive film to guarantee the transport of water molecules while keep the large particles of pollutants isolated. The temperature compensation, fault diagnosis and other intelligent methods will be combined, and ultimately humidity sensors with high stability will be obtained. The implementation of this project will provide the core components for the humidity control of industrial processes, promote the application of in situ preparation of cross-linked polymers in the field of humidity sensing, and develop impedance-type humidity sensors with low cost and high stability, which could meet the requirements of actual detection and control.