Spectroscopic evaluation of polyurea crosslinked aerogels,as a substitute for RTV-based chromatic calibration targets for spacecraft |
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| Authors: | F Sabri N Leventis J Hoskins AC Schuerger M Sinden-Redding D Britt RA Duran |
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| Institution: | 1. Department of Physics, University of Memphis, 219 Manning Hall, Memphis, TN 38152, USA;2. Department of Chemistry, Missouri University of Science and Technology, Rolla, MO 65409, USA;3. Department of Physics, University of Florida, Gainesville, Fl 32611, USA;4. Department of Plant Pathology, University of Florida, Mail Code UF1, Space Life Sciences Laboratory, Kennedy Space Center, FL 32899, USA;5. Department of Physics, University of Memphis, Memphis, TN 38152, USA;6. Department of Physics, University of Central Florida, P.O. Box 162385, Orlando, FL 32816, USA;g Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL 32611, USA |
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| Abstract: | Room temperature vulcanizing (RTV)-based components have been used on Mars Pathfinder, the Mars rovers, Spirit and Opportunity, as well as the Phoenix Lander as a support matrix for pigmented panoramic camera calibration targets. RTV 655 has demonstrated superiority to other polymers due to its unique range of material properties namely mechanical stability between −115 and 204 °C and UV radiation tolerance. As a result, it has been the number one choice for many space-related missions. However, due to the high mass density and the natural tendency for electrostatic charging RTV materials have caused complications by attracting and retaining dust particles (Sabri et al., 2008). In the current project we have investigated the relevant properties of polymer-reinforced (crosslinked) silica aerogels with the objective of substituting RTV-based calibration targets with an aerogel based design. The lightweight, mechanical strength, ability to accept color pigments, and extremely low dust capture makes polyurea crosslinked aerogels a strong candidate as a chromatic standard for extraterrestrial missions. For this purpose, the reflection spectra, gravimetric analysis, and low temperature response of metal oxide pigmented, polyurea crosslinked silica aerogels have been investigated and reported here. |
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| Keywords: | Mars Aerogel Calibration targets Chromatic RTV 655 Reflection spectra |
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