Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 20, Pages 10651-10655Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b01772
Keywords
drag reduction; air retention; superhydrophobic; bioinspired; wetting transition
Funding
- Carl Zeiss Foundation, Landesgraduiertenforderung
- Karlsruhe Nano Micro Facility (KNMF)
- Helmholtz Research Infrastructure at Karlsruhe Institute of Technology (KIT)
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Bioinspired nanofur, covered by a dense layer of randomly distributed high aspect ratio nano- and microhairs, possesses superhydrophobic and air-retaining properties. Nanofur is fabricated using a highly scalable hot pulling method in which softened polymer is elongated with a heated sandblasted plate. Here we investigate the stability of the underwater air layer retained by the irregular nanofur topography by applying hydraulic pressure to the nanofur kept underwater, and evaluate the gradual changes in the air-covered area. Furthermore, the drag reduction resulting from the nanofur air retention is characterized by measuring the pressure drop across channels with and without nanofur.
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