文章信息/Info

Title:

Biomimetic Micro- and Nanopillar Adhesives

作者:

汪鑫; 李倩; 薛龍建

武漢大學

Author(s):

WANG Xin;  LI Qian;  XUE Longjian

Wuhan University

關鍵詞:

仿生材料; 干態粘附; 濕態粘附; 摩擦; 柱狀陣列; 聚合物; 壁虎

Keywords:

bioinspired materials;  dry adhesion;  wet adhesion;  friction;  pillar array;  polymer;  gecko

DOI:

10.7502/j.issn.1674-3962.2017.01.07

文獻標志碼:

A

摘要:

自然界中很多動物，如壁虎、甲蟲和樹蛙等，主要利用可逆的粘附力在各種表面爬行。研究發現這些動物腳趾上的特殊微納柱狀結構（剛毛、平滑結構等）起到了至關重要的作用。這些柱狀微納結構及其精細亞結構保證了動物腳趾能與接觸表面形成很多的有效接觸點，從而形成足夠強的粘附力，可達動物體重的200倍。另一方面，這些微納結構又可以保證動物能從粘附的表面迅速脫離。這種粘附能力依賴于結構而非接觸材料的表面化學組成的特性，具有極高的科研價值和應用前景。

Abstract:

Many animals (gecko, beetle, tree frog, etc.) can climb on various substrates by reversible adhesion forces, which are determined by the micro/nano-pillar structures (seta, smooth pad, etc.) on their toe pads. The mirco/nano-pillars with fine sub-structures ensure numerous effective contact points between the toe pad and the substrate, forming tremendous adhesion forces as high as 200 folds of animal’s body weight. On the other hand, the fine structures in mirco/nano-pillars also ensure the effective detachment from the adhering surface. The adhesion abilities, relying on the fine structures rather than the surface chemistry, arise great scientific interests and wide potential applications.