基于ATR-FTIR检测技术的航天器结构板表面污染物分析

文章制定了航天器结构板表面污染物成分鉴定与来源解析的技术方案，并根据该方案采用衰减全反射傅里叶变换红外光谱（Attenuated Total Reflection Fourier Transform Infrared, ATR-FTIR）检测技术对航天器热真空试验后结构板表面的白色污染物进行成分鉴定，结果表明污染物的主要成分为酰胺类物质。将疑似污染物来源物质的ATR-FTIR光谱图与污染物光谱图进行对比分析，推断出航天器结构板表面污染物来源于热真空试验过程中含胶热缩管内层的热熔胶，并通过验证试验证明了污染物来源推断的正确性。研究可为航天器污染物的预防和控制提供技术支持。

Surface contaminant analysis of spacecraft structural panel based on ATR-FTIR detection technology

In this paper, a technical scheme for the composition identification and source analysis of contaminants deposited on the surface of spacecraft structural panel was formulated. Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR) detection technology was used to identify the composition of the white contaminants on the surface of spacecraft structural panel after thermal vacuum test. The results show that the main components of the contaminants are amides. By comparing the ATR-FTIR spectra of suspected contaminants with those of contaminants, it is inferred that the contaminants deposited on the surface of spacecraft structural panel come out of the hot melt adhesive in the inner layer of the heat shrinkable tube during the thermal vacuum test. In addition, the correctness of the inference of contaminant source is proved through a verification test. This study may provide technical support for the prevention and control of spacecraft contaminants.