AlchLight has developed transparent anti-fog superhydrophobic polycarbonates for spacesuit helmets using femtosecond pulsed laser surface patterning technology. In contrast to conventional complex chemical coating processes, our laser patterning permanently alters the intrinsic wetting property of polycarbonate with little change to its transparency. The processing procedure is studied and optimized to produce the ideal superhydrophobic property and transparency. We were able to obtain a high contact angle (>150°), small sliding angle (70%) over the visible wavelengths for polycarbonates. The anti-fog effect was also investigated. This technology will have a range of applications in spacesuit, automotive, medical, energy, and sports industries. Trade names are used in this presentation for identification only. Their usage does not constitute an official endorsement, either expressed or implied, by the National Aeronautics and Space Administration.
Ngo et al. (Sun,) studied this question.
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