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Japan's leading diversified materials manufacturer Nitto Denko Corporation (Nitto Denko) has developed a biomimic adhesive having a shear adhesive strength like natural gecko's foot, the company announced today. The biomimic adhesive ("Gecko Tape") made of optimal carbon nanotube (CNT) array, has been developed jointly with the Nakayama Laboratory of Osaka University, led by Prof. Yoshikazu Nakayama.
The Laboratory is engaged in the development and systematization of nanoengineering for nanomaterials consisting of carbon atoms as the main element.
Geckos have an amazing shear adhesive strength (SAS)(*) to climb vertical walls and support their own weight by a single digit even from a ceiling. Many attempts around the world have been made to develop the biomimic adhesives. However, the SAS of these structures have been much lower than that of natural gecko, the improvement of SAS has been the biggest challenge in the development of man-made gecko activities.
(*) Shear Adhesive Strength is an adhesive strength that resists the parallel force in opposing directions between two flat surfaces that have been adhered together.
Nitto Denko succeeded in producing man-made Gecko Tape that showed SAS like natural gecko's foot, by preparing a fiber array with vertically oriented CNTs, and further optimizing the shape of the CNTs.
1. Demonstrates an SAS close to that of geckos found in nature
2. Adhesion is strongly, but peel-off comes easy if peeling is needed
3. Adhesion surface is free of soiling
4. Adhesion is possible on any object
5. Excels in heat resistance.
In order to meet market needs expected to become increasingly diverse, Nitto Denko is intent on pursuing the development new adhesive systems by combining together biomimetics and nanotechnologies, to come up with high value-added products and applications.
The company further hopes to tie this development into creating new adhesive tapes with functions different from conventional tapes and contributing to the "Green (Marked by environmental contribution and low environmental loading)", "Clean (new energy and energy conservation-related)" and "Fine (Advanced technologies in a domain such as life sciences)" concept that Nitto Denko Group intends to leverage in its value offers.
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