Biomimicry Suction Cups Withstand More Than Splashes
On the rocky shores of Washington State, clingfish maneuver over rocks to prey on limpets–dime-sized, snail-like invertebrates. A limpet is covered by a shell shield that hides soft organs, which are fair game if the predatory clingfish can pop it off the rock. Yet the clingfish faces its own foe: heavy forces from incoming waves that threaten to slosh it off the rocks as it searches for food. The clingfish, however, has developed a unique system for holding onto rocks by using a suction cup on its underside, which has been derived from pelvic and pectoral fins.
Ditsche and her colleagues are interested in biomimicry, a field that uses nature’s solutions, refined in some of the toughest environments, for our own applications. This field of study has given us bullet trains shaped like kingfisher beaks, Velcro inspired by the burrs of plants, and fabric that glides through the water almost as well as shark skin.
Biomimicry is not about creating a one-to-one replica of the original inspiration, Ditsche says. Instead, it requires understanding of the underlying mechanisms so that the technology can be employed in a simplified yet useful manner. Ditsche has focused on replicating both the adaptability of the material to rough surfaces and the high friction at the margins of the suction cup that prevent the cup from being dislodged easily. Initial tests have shown that these biomimetic models have a grip of up to 70,000 Pascals on rough surfaces, equivalent to the pressure of 10 great white sharks stacked upon an office desk.
Ultimately, these super suction cups could be deployed during surgeries to pull tissue out of the way without risk of puncture or for use when climbing wet surfaces. Currently, they are slated to return to the waters where the clingfish that inspired them reside: the Puget Sound in Washington. Here, a population of endangered orca whales is tracked and carefully monitored by researchers. Once field-tested, these suction cups could provide a way to attach tracking tags in a less-invasive manner than current techniques. Bio-inspired design is re-entering the natural world to allow for even more research, taking any splashes in stride.
By Kaitlyn Lowder
Source: http://www.ineffableisland.com/2017/01/biomimicry-suction-cups-withstand-more.html
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Petra Ditsche?” Petrie dish? Is this a great name for a scientist or is this a joke?