Variable Emissivity Electrochromics Using Ionic Electrolytes and Low Solar Absorptance Coatings

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,956.00
Award Year:
2008
Program:
SBIR
Phase:
Phase I
Contract:
NNX08CB96P
Award Id:
88045
Agency Tracking Number:
074830
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
500 James Street, Unit 7, Lakewood, NJ, 08701
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
807772942
Principal Investigator:
Prasanna Chandrasekhar
Principal Investigator
(732) 462-1270
chandra.p2@ashwin-ushas.com
Business Contact:
Prasanna Chandrasekhar
Business Official
(732) 462-1270
chandra.p2@ashwin-ushas.com
Research Institute:
n/a
Abstract
In recent work, this firm developed a highly promising, patented variable emittance technology based on electrochromic Conducting Polymers, with: (1) Thin (< 0.2 mm), flexible, lightweight (0.176 kg/m2), variable area (0.5 cm2 - 0.5 m2. (2) Impervious to flexing, micrometeoroids.(3) High Delta Emittance (0.5, range 0.13 - 0.89).(4) > 105 cycles, < 5 s switching, indefinite optical memory. (5) Low power, 0.30 W/m2 (6) Space durability: (10-6 Torr) 100,000 electrochromic cycles, 90 thermal cycles;. no UV degradation > 500 h. Durability against atomic-O. (7) Operating temperature (-) 45 oC to (+) 100 oC, durability (-) 196 oC to (+) 100 oC. (8) Easily applicable with space-qualified adhesive to any surface. (9) Cost ca. < $5K/m2. A key technical barrier of the earlier generation of this technology was the need for a hermetic seal for space durability. This was resolved through use of unique ionic electrolytes. An additional drawback remained: High solar absorptance of the dark-state. In very recent, unrelated work, this firm has developed coatings that are IR transparent from 2 to 25 microns while having very low solar absorptance (data herein). In the proposed work, these will be used to arrive at unique, variable emissivity materials with very low solar absorptance. Proposed work includes extensive space durability testing.

* information listed above is at the time of submission.

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