稀薄气体环境高灵敏度高稳定性压力敏感涂料开发与表征

doi:10.7527/S1000-6893.2024.31443

Abstract

Abstract:

Accurate measurement of the surface pressure distribution of spacecraft models under low-pressure conditions contributes to the optimal design of space probes. Pressure-Sensitive Paint （PSP） is a non-contact technique for optical measurement of full-field surface pressure distribution. To apply the PSP technology in rarefied gas environments， PSP with high pressure sensitivity and high pressure sensitivity constancy at low pressures needs to be developed. This paper uses PdTFPP， a luminophore with long luminescence life， Room-Temperature Vulcanized （RTV） silicone rubber， a polymer with high oxygen permeability， and micro-nano-particles with different types and contents to develop pressure-sensitive paints. The influences of the particle type， particle contents， and dispersants on the static performances of the PSP are investigated. Experimental results indicate that the Polymer-Ceramic Pressure-Sensitive Paint （PC-PSP）， employing mesoporous silica （mSiO₂） as the micro-nano-particles， exhibits higher pressure sensitivity and lower photodegradation rate compared to other micro-nano-particles. PdTFPP/mSiO₂-RTV， with a particle content of 70wt% and prepared without dispersant， has a pressure sensitivity and pressure sensitivity constancy of 80.72%/kPa and 99.44%， respectively， and its temperature sensitivity and photodegradation rate are -0.9%/K and -0.09%/min， respectively. In comparison to other PSP based on highly oxygen permeable polymers， PdTFPP/mSiO₂-RTV （70wt%） is demonstrated to be more suitable for static small pressure measurements in low pressure environments.

Key words: pressure sensitive paint, rarefied gas environment, static performance, pressure sensitivity, pressure sensitivity constancy

CLC Number:

V411.7

Jing WU, Peihui CHEN, Zanqiang HUANG, Feng HUANG, Guoshuai LI. Development and characterization of pressure-sensitive paint with high sensitivity and constancy in rarefied gas environments[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(14): 131443.

Figures/Tables 16

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名称	颗粒含量/wt%	分散剂	溶剂
PdTFPP/TiO₂-RTV	90	无	甲苯
PdTFPP/SiO₂-RTV	90	无	甲苯
PdTFPP/mSiO₂-RTV	10~90	无	甲苯
PdTFPP/mSiO₂-RTV	70	Tween80（1wt%~2wt%）	甲苯
PdTFPP/mSiO₂-PTMSP	90	无	甲苯
PdTFPP/mSiO₂-B1000	90	无	甲醇
PdTFPP/PTMSP		无	甲苯

颗粒含量/wt%	温度敏感度/（%·K^-1）	光降解率/（%·min^-1）
10	-1.94	-0.44
20	-1.56	-0.53
30	-1.28	-0.66
40	-1.08	-0.58
50	-0.75	-0.39
60	-1.08	-0.25
70	-0.90	-0.09
80	-0.74	-0.07
90	-0.74	-0.09

Development and characterization of pressure-sensitive paint with high sensitivity and constancy in rarefied gas environments

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