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Proceedings Paper

Wrinkling atop shape memory polymer with patterned surface
Author(s): W. M. Huang; Y. Zhao; L. Sun; N. N. Ei; T. H. Tong
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Paper Abstract

We have previously demonstrated that various types of patterns at different scales can be easily realized atop shape memory polymers (SMPs) through a procedure in three steps, namely, indentation, polishing and heating (IPH). On the other hand, by coating a thin metallic layer (e.g., a few nanometers thick of gold) atop SMPs with or without prestraining, different types of wrinkles could be generated. In this paper, we investigate the wrinkling patterns formed on the top of SMPs with a patterned surface, i.e., wrinkling atop a surface with a protrusion pattern. As the wrinkles are resulted simultaneously by two phenomena upon heating, namely the shape recovery of the SMP substrate and buckling of the elastic metallic layer, the wrinkle pattern varies from one location to another depending on the exact local strain. Utilizing this technique, we are able to simultaneously produce a surface with complicate surface patterns at both micro and millimeter levels. Such surfaces could significantly enhance many surface properties, e.g., bonding, adhesion and friction etc.

Paper Details

Date Published: 20 October 2009
PDF: 8 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749337 (20 October 2009); doi: 10.1117/12.843116
Show Author Affiliations
W. M. Huang, Nanyang Technological Univ. (Singapore)
Shenyang Jianzhu Univ. (China)
Y. Zhao, Nanyang Technological Univ. (Singapore)
L. Sun, Shenyang Jianzhu Univ. (China)
N. N. Ei, Nanyang Technological Univ. (Singapore)
T. H. Tong, Cornerstone Research Group, Inc. (United States)

Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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