20 October 2009 Wrinkling atop shape memory polymer with patterned surface
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Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749337 (2009) https://doi.org/10.1117/12.843116
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China
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.
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W. M. Huang, Y. Zhao, L. Sun, N. N. Ei, T. H. Tong, "Wrinkling atop shape memory polymer with patterned surface", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749337 (20 October 2009); doi: 10.1117/12.843116; https://doi.org/10.1117/12.843116
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