15 October 2012 Development and testing of molecular adsorber coatings
Author Affiliations +
Abstract
The effect of on-orbit molecular contamination has the potential to degrade the performance of spaceflight hardware and diminish the lifetime of the spacecraft. For example, sensitive surfaces, such as optical surfaces, electronics, detectors, and thermal control surfaces, are vulnerable to the damaging effects of contamination from outgassed materials. The current solution to protect these surfaces is through the use of zeolite coated ceramic adsorber pucks. However, these pucks and its additional complex mounting hardware requirements result in several disadvantages, such as size, weight, and cost related concerns, that impact the spacecraft design and the integration and test schedule. As a result, a new innovative molecular adsorber coating was developed as a sprayable alternative to mitigate the risk of on-orbit molecular contamination. In this study, the formulation for molecular adsorber coatings was optimized using various binders, pigment treatment methods, binder to pigment ratios, thicknesses, and spray application techniques. The formulas that passed coating adhesion and vacuum thermal cycling were further tested for its adsorptive capacity. Accelerated molecular capacitance tests were performed in an innovatively designed multi-unit system containing idealized contaminant sources. This novel system significantly increased the productivity of the testing phase for the various formulations that were developed. Work performed during the development and testing phases has demonstrated successful application of molecular adsorber coatings onto metallic substrates, as well as, very promising results for the adhesion performance and the molecular capacitance of the coating. Continued testing will assist in the qualification of molecular adsorber coatings for use on future contamination sensitive spaceflight missions.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nithin S. Abraham, Mark M. Hasegawa, Sharon A. Straka, "Development and testing of molecular adsorber coatings", Proc. SPIE 8492, Optical System Contamination: Effects, Measurements, and Control 2012, 849203 (15 October 2012); doi: 10.1117/12.964419; https://doi.org/10.1117/12.964419
PROCEEDINGS
11 PAGES


SHARE
RELATED CONTENT

Black molecular adsorber coatings for spaceflight applications
Proceedings of SPIE (September 09 2014)
Development of molecular adsorber coatings
Proceedings of SPIE (September 07 2010)
Organic materials for the use in optical layer systems
Proceedings of SPIE (October 03 2011)
Next generation thermal control coatings
Proceedings of SPIE (January 01 1991)

Back to Top