Variable Emittance Materials Based on Conducting Polymers for Spacecraft Thermal Control

Details Variable Emittance Materials Based on Conducting Polymers for Spacecraft Thermal Control Variable Emittance Materials Based on Conducting Polymers for Spacecraft Thermal Control

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..654..157c&link_type=abstract

SPACE TECHNOLOGY AND APPLICATIONS INT.FORUM-STAIF 2003: Conf.on Thermophysics in Microgravity; Commercial/Civil Next Generation

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Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

Ashwin-Ushas has developed a unique, patented Variable Emittance technology based on the infrared (IR) electrochromism of unique Conducting Polymers. This has features of: very thin (< 0.5 mm), flexible, light weight (1.6 kg/m2) variable area (1 cm2 to 1 m2), entirely solid-state, extremely physically durable construction; switching times < 5 s at room temperature, < 3 min at -35°C cyclabilities > 104 cycles; low power consumption (< 40 μW/ cm2) and most importantly, space environment durability (space vacuum and -40 °C to + 75 °C, Solar Wind, gamma radiation to 7.6 Mrad). A demonstrator spaceflight is tentatively planned on NASA-Goddard's ST5 mission. This paper describes the features and current status of the technology, including results from the most recent tests. It is shown that the technology is the most promising among proposed new Variable Emittance technologies, and possibly one of the only technologies applicable to microspacecraft, besides also being applicable to large spacecraft, space based radars, and future interplanetary missions.

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