Adhesion and anisotropic friction enhancements of angled heterogeneous micro-fiber arrays with spherical and spatula tips

被引：158

作者：

Murphy, Michael P. ^{[1
]}

Aksak, Burak ^{[1
]}

Sitti, Metin ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA

来源：

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY | 2007年 / 21卷 / 12-13期

关键词：

gecko; adhesion; angled fiber array; friction; dry adhesive; bioinspired adhesive;

D O I：

10.1163/156856107782328380

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Angled polyurethane fiber arrays are modified by adding soft spherical and spatula shaped tips via dipping. These fibers are characterized for adhesion and friction and compared with unmodified fibers and flat material samples. Sphere and spatula tip fiber samples demonstrate increased adhesion, with 10 and 23 times the maximum adhesion of the unmodified fiber sample, respectively. The sphere and spatula tip fiber samples also show increased friction, with 1.6 and 4.7 times the maximum friction of the unmodified fiber sample, respectively. Friction and adhesion are simultaneously observed in a synthetic dry angled fibrillar adhesive sample (spatula tip fiber sample). The direction dependent friction of angled fibers is investigated. The adhesion and friction results reported in this paper suggest that fibers with negligible adhesion can be modified to exhibit both significant adhesion and friction enhancements by the proposed fiber tip modifications.

引用

页码：1281 / 1296

页数：16

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