Inherently Electrostatic Dissipative Polymers for Space

In orbit, a satellite is exposed to solar radiation and to plasma, which has the effect of accumulation charge on the outer surface. On insulating surfaces in shadow, potentials of 18kV are measured, whereas the illuminated surfaces have potentials of zero. Such differences cause electrical discharge, resulting in; damage to the thermo-optical and mechanical properties of the satellite films, radio interference, and the onboard electrical equipment to switch logical states. Eikos Inc. proposes the use of single wall carbon nanotubes (SWnT) in LARC-developed polyimides as a novel transparent, electrostatic dissipation (ESD) films for spacecraft protection. This technology will provide environmentally stable and durable ESD films while protecting the surface from atomic oxygen (AO), Ultraviolet (UV) light by exploiting space proven polyimides. To the polyimide is added highly conductive SWnT to form interpenetrated network or nanocomposite, which is conductive, tough, and lightweight. The use of SWnT within this matrix to impart ESD protection offers a cost effective approach for a wide array of application and products. The applications include nanocomposite films for deployable structures, shielding, concentrators, and thermal barriers.