Microfibers with mushroom-shaped tips for optimal adhesion
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United States of America Patent
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Jun 23, 2020
Grant Date -
Dec 24, 2015
app pub date -
Feb 10, 2014
filing date -
Feb 8, 2013
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Abstract
This invention identifies important geometric parameters of an adhesive microfiber with mushroom-shaped tip for improving and optimizing adhesive ability. The magnitude of pull-off stress is dependent on a wedge angle γ and the ratio of the tip radius to the stalk radius β of the mushroom-shaped fiber. Pull-off stress is also found to depend on a dimensionless parameter x, the ratio of the fiber radius to a length-scale related to the dominance of adhesive stress. Finally, the shape of edge tip, where the surface and sides of the mushroom-shaped tip join, is a factor that impacts strength of adhesion. Optimizing ranges for these parameters are identified.
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