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According to the report of the American Physicist Organization Network on February 16, scientists at the University of Massachusetts at Amstel broke the mystery of the strong adhesion of the Gecko's foot, and developed the super-gluing device Gecko Skin. It can be attached to smooth walls and can hold more than 300 kilograms. The relevant research report was published in the latest edition of Advanced Materials Magazine.
For many years, biologists have been surprised at the gecko's foot strength, which can be easily attached and stripped without leaving any traces on the crawled surface. Previously similar synthetic materials were based on the bristles of the gecko's toes, but it was difficult to achieve large-scale combinations. Part of the reason is that the gecko's foot structure is very complex, including tendons, bones, and skin, which interact with each other, and these elements need to be integrated to easily achieve reversible adhesion.
The "Gecko skin" is highly efficient, reversible, and dry. This palm-sized device can withstand up to 317 kilograms when attached to a smooth surface such as glass. In addition to impressive adhesion, the device is also effortless to peel off and can be reused multiple times without failure. For example, it can be used to attach a 42-inch television weighing about 18 kilograms to a smooth vertical surface, and to separate it from the contact surface with just a slight drag, it can be attached to other needs. Places do not leave traces even if used multiple times. This new synthetic material can also be applied to medical and industrial fields in addition to the free attachment of electronic products to walls and separation from them.
The key innovation of this research is the interweaving of hard fibers and cushions to form a complete adhesive, allowing maximum contact between the cushion and the attached surface. In addition, like the real gecko foot, the “skin†will also be intertwined with the synthetic “tendon†in the adhesive device, maintaining efficient attachment and free reversibility. Researchers point out that this new parsing concept has not yet been applied to other design strategies, and it may allow new ways of developing gecko bionics research in the future. At the same time, the use of commonly used materials such as polydimethylsiloxane in the manufacture of "Gecko skin" adhesive pads ignited hopes for the development of economical, strong and durable dry adhesives. (Zhang Hao)
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