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Advanced Aerogel Scattering Materials for Control of Infrared Radiation

Completed TRL 2 (started at 1, targeting 2)

Description

This proposed activity is focused on the development of cyclic-olefin-copolymer aerogels imbedded with wavelength scattering particles for tunable IR filtering applications. Aerogels are a unique class of nanoporous materials with superior insulating properties Research at GRC with collaboration from GSFC, has led to the development of IR-blocking aerogel materials for applications in the sub-millimeter and far-IR wavelengths. Currently available aerogel materials are limited to use at wavelengths longer than approximately 30 μm, due to strong absorption bands in the mid-IR. A promising class of materials, cyclicolefin copolymers (COCs), exhibit an absence of absorption lines throughout the mid-IR, to wavelengths as low as 14 μm, and low moisture absorption rate. Cyclic Olefin Copolymer (COC) aerogels combine the characteristic properties of aerogels; high specific surface area, low density, low dielectric, high porosity, thermal impedance, with the IR transparency, low birefringence, and mechanical robustness of cyclic olefin polymers. This project will investigate the feasiblity of creating an IR-transparent aerogel based on COCs with diamond scattering particles to extend the reach of this technology into the mid-IR.

Benefits

Extraterrestrial missions concerned with spacecraft thermal control, remote sensing, and planetary defense are all impacted by the effects of unfiltered radiation. Creation of novel wavelength-selective materials is key in creating IR blocking filters to minimize heat load on receiver cryogenic systems, stabilization of instruments, and extension of mission life. No infrared-blocking filter technology in use today provides the combination of high transmission across a wide band, broadband IR rejection, and tunable cutoff frequency that is achievable with aerogel scattering filters.

Details

Technology areaMaterials, Structures, Mechanical Systems, and Manufacturing > Materials > Lightweight Structural Materials
ProgramCenter Innovation Fund: GRC CIF (GRC CIF)
Lead organizationGlenn Research Center, Cleveland, OH
Start date2020-10-01
End date2021-09-30

Project contacts

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