Polyvinyl alcohol (PVA) films with embedded electrically-responsive liquid crystal (LC) ellipsoids were fabricated to develop a membrane coating featuring tunable roughness. Membranes (∼30 microns thick) were placed between opposing pieces of indium-tin oxide (ITO) glass, creating electrodes for creation of a uniform electric field. Applied voltages ranged from 0V–350 V, as films were observed using an optical microscope. Thin-film interference patterns were observed in various regions of each film and were measured. Contour plots of film displacement were created and showed elevations across the observed region. The area of the first dark fringe regions, assumed to be in contact with the top glass surface, were measured as a function of applied voltage. The maximum displacement of the film was estimated to reach 1.5 microns and the area in contacted with the top glass surface increased 127% between 0–350 V. Finite element modelling results illustrate the influence of polarity on the roughness of the film surface.
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ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 18–21, 2011
Scottsdale, Arizona, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5471-6
PROCEEDINGS PAPER
Polymer Skins With Switchable Roughness Available to Purchase
Nicholas J. Morris,
Nicholas J. Morris
West Virginia University, Morgantown, WV
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Joaquin M. Gutierrez,
Joaquin M. Gutierrez
West Virginia University, Morgantown, WV
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Ever J. Barbero,
Ever J. Barbero
West Virginia University, Morgantown, WV
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Darran R. Cairns
Darran R. Cairns
West Virginia University, Morgantown, WV
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Nicholas J. Morris
West Virginia University, Morgantown, WV
Joaquin M. Gutierrez
West Virginia University, Morgantown, WV
Ever J. Barbero
West Virginia University, Morgantown, WV
Darran R. Cairns
West Virginia University, Morgantown, WV
Paper No:
SMASIS2011-5129, pp. 475-480; 6 pages
Published Online:
February 7, 2012
Citation
Morris, NJ, Gutierrez, JM, Barbero, EJ, & Cairns, DR. "Polymer Skins With Switchable Roughness." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 475-480. ASME. https://doi.org/10.1115/SMASIS2011-5129
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