Torrent Frog-Inspired Adhesives: Attachment to Flooded Surfaces

被引：126

作者：

Iturri, Jagoba ^{[1
]}

Xue, Longjian ^{[1
]}

Kappl, Michael ^{[1
]}

Garcia-Fernandez, Luis ^{[1
]}

Barnes, W. Jon P. ^{[2
]}

Butt, Hans-Juergen ^{[1
]}

del Campo, Aranzazu ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, Ackermannweg, D-55128 Mainz, Germany

[2] Univ Glasgow, Ctr Cell Engn, Glasgow G12 8QQ, Lanark, Scotland

来源：

ADVANCED FUNCTIONAL MATERIALS | 2015年 / 25卷 / 10期

关键词：

TREE FROG; TOE PADS; ASPECT-RATIO; MECHANISMS; MORPHOLOGY; DRY;

D O I：

10.1002/adfm.201403751

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Anatomic differences on the toe pad epithelial cells of torrent and tree frogs (elongated versus regular geometry) are believed to account for superior ability of torrent frogs to attach to surfaces in the presence of running water. Here, the friction properties of artificial hexagonal arrays of polydimethylsiloxane (PDMS) pillars (elongated and regular) in the presence of water are compared. Elongated pillar patterns show significantly higher friction in a direction perpendicular to the long axis. A low bending stiffness of the pillars and a high edge density of the pattern in the sliding direction are the key design criteria for the enhanced friction. The elongated patterns also favor orientation-dependent friction. These findings have important implications for the development of new reversible adhesives for wet conditions.

引用

页码：1499 / 1505

页数：7

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