Study of Pressure Sensitive Coating Using Palladium Octaethylporphyrin as Luminescent Molecule
Pressure sensitive paint (PSP) has become a useful tool to measure the surface pressure distribution of aerodynamic components replacing conventional pressure taps. For the PSP technique based on the luminescence quenching by oxygen, improvement of its sensitivity is important. In this study, we synthesized palladium octaethylporphyrin (PdOEP) as luminophor and embeded PdOEP in polydimethylsiloxane (PDMS) as polymeric binder to make up of pressure sensitive paints. We used UV/Vis spectrometer and spectrofluorimeter to study the absorption and phosphorescence spectra of PdOEP. In addition, by our self-made experimental setup, the sensitivity of PSPs were examined especially in the range of pressure below 150 Pa. As a result, it is clarified that the PSP using PdOEP as a luminophore and using PDMS as a binder has very high sensitivity to oxygen pressure in low pressure conditions below 150 Pa.
H. Wang, B.J. Zhang, X.Z. Liu, D.Z. Luo, S.B. Zhong
X. L. Cao et al., "Study of Pressure Sensitive Coating Using Palladium Octaethylporphyrin as Luminescent Molecule", Advanced Materials Research, Vols. 143-144, pp. 1002-1006, 2011