期刊
APPLIED SURFACE SCIENCE
卷 257, 期 8, 页码 3336-3340出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2010.11.017
关键词
Gecko-inspired; Dry adhesion; Polyurethane; Microarrays; Triboindenter
类别
资金
- National Basic Research Program of China [2011CB302103]
- Natural Science Foundation of China [20873153]
- State Key Laboratories of Transducer Technology
We studied the influence of the elastic modulus on the gecko-inspired dry adhesion by regulating the elastic modulus of bulk polyurethane combined with changing the size of microarrays. Segmented polyurethane (PU) was utilized to fabricate micro arrays by the porous polydimethyl siloxane (PDMS) membrane molding method. The properties of the micro arrays, such as the elastic modulus and adhesion, were investigated by Triboindenter. The study demonstrates that bulk surfaces show the highest elastic modulus, with similar values at around 175 MPa and decreasing the arrays radius causes a significant decrease in E, down to 0.62 MPa. The corresponding adhesion experiments show that decrease of the elastic modulus can enhance the adhesion which is consistent with the recent theoretical models. (C) 2010 Elsevier B.V. All rights reserved.
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