文章信息/Info

Title:

Biomimetic Micro- and Nanopillar Adhesives

作者:

汪鑫; 李倩; 薛龍建

武漢大學(xué)

Author(s):

WANG Xin;  LI Qian;  XUE Longjian

Wuhan University

關(guān)鍵詞:

仿生材料; 干態(tài)粘附; 濕態(tài)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(xiàn)標(biāo)志碼:

A

摘要:

自然界中很多動(dòng)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(fā)現(xiàn)這些動(dòng)物腳趾上的特殊微納柱狀結(jié)構(gòu)（剛毛、平滑結(jié)構(gòu)等）起到了至關(guān)重要的作用。這些柱狀微納結(jié)構(gòu)及其精細(xì)亞結(jié)構(gòu)保證了動(dòng)物腳趾能與接觸表面形成很多的有效接觸點(diǎn)，從而形成足夠強(qiáng)的粘附力，可達(dá)動(dòng)物體重的200倍。另一方面，這些微納結(jié)構(gòu)又可以保證動(dòng)物能從粘附的表面迅速脫離。這種粘附能力依賴于結(jié)構(gòu)而非接觸材料的表面化學(xué)組成的特性，具有極高的科研價(jià)值和應(yīng)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.