聚合物基压力敏感涂料近真空稳态特性研究及优化  

Investigation and optimization on static characteristics of polymer-based pressure-sensitive paints in near-vacuum environment

作　　者：吴靖 陈远哲 郭禹泽 孔迪 黄峰 Wu Jing;Chen Yuanzhe;Guo Yuze;Kong Di;Huang Feng(College of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学机械工程及自动化学院,福州350108

出　　处：《仪器仪表学报》2022年第7期123-130,共8页Chinese Journal of Scientific Instrument

摘　　要：压力敏感涂料(PSP)作为一种分子级的氧传感器,已广泛应用于飞行器气动力的高分辨率全场测量。为了将PSP应用于近真空环境飞行器气动特性的分析和研究,需要研究和制备在低压下压力灵敏度足够高的PSP,以实现近真空环境下的微小压力测量。采用具有高氧透过性的高分子聚合物PTMSP为基层、以PdTFPP和PtTFPP为不同发光分子的两种PSP,即PdTFPP/PTMSP和PtTFPP/PTMSP,在近真空环境下开展稳态校准特性研究。实验结果表明,PdTFPP/PTMSP的压力灵敏度显著高于PtTFPP/PTMSP,而温度敏感度和光稳定性与PtTFPP/PTMSP相当,更适合用于近真空环境下测量微小压力的变化。进一步对PdTFPP/PTMSP开展特性优化研究,发现PdTFPP/PTMSP的压力灵敏度随发光分子和聚合物浓度的增加而先上升后下降,并且在发光分子和聚合物浓度分别为1.2和8 mg/mL时达到最高值68.65%/kPa。使用甲苯作为溶剂的PdTFPP/PTMSP配方压力灵敏度明显高于二氯甲烷和丙酮为溶剂时的配方,且温度敏感性和光稳定性最佳。Pressure-sensitive paint(PSP), as a molecular-level oxygen sensor, has been widely used for high resolution full-field aerodynamics measurement of aircrafts. To apply PSP for the analysis and study of aerodynamic characteristics of aircrafts in near-vacuum environment, PSP with sufficiently high pressure sensitivity at low pressures needs to be prepared and studied to enable small pressure measurements in near-vacuum environments. In this article, two PSPs, namely PdTFPP/PTMSP and PtTFPP/PTMSP, with high-oxygen-permeability polymer PTMSP as the binder, PdTFPP and PtTFPP as luminescent molecules, are used to carry out the static calibration characteristics in near-vacuum environment. Experimental results show that the pressure sensitivity of PdTFPP/PTMSP is significantly higher than that of PtTFPP/PTMSP. While the temperature sensitivity and photostability of PdTFPP/PTMSP are comparable to those of PtTFPP/PTMSP, which is more suitable for measuring small pressure changes in near-vacuum environment. Further characterization of PdTFPP/PTMSP reveals that the pressure sensitivity of PdTFPP/PTMSP increases and then decreases with the increase of the concentration of luminescent molecule and polymer, and reaches the highest value of 68.65 %/kPa at concentrations of luminescent molecule and polymer are 1.2 and 8 mg/mL, respectively. The PdTFPP/PTMSP with toluene as solvent has the better pressure sensitivity than the formulation with dichloromethane or acetone as solvent, and has the optimum temperature sensitivity and photostability.

关 键 词：压力敏感涂料 聚合物基 近真空环境 稳态校准 压力灵敏度 

分 类 号：TH744[机械工程—光学工程] TP212[机械工程—仪器科学与技术]