2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 7: Yang Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Aifantis E, Wang H, Zhu T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 190 pages |
| ISBN: | 978-1-987820-48-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Self-Assembled 3D Shape Formation Induced by Chemical Stimuli
Kuen Jimmy Hsia1;1CARNEGIE MELLON UNIVERSITY, Pittsburgh, United States;
Type of Paper: Regular
Id Paper: 468
Topic: 1
Abstract:
Self-assembly processes, often driven by mechanical interactions between different parts in a material, can lead to formation of tubes, 3D structures, or devices with unique properties. The stimuli for these self-assembly processes can be thermal, chemical, or even by living cells or through intrinsic material properties such as lattice parameter differences. Here I present a few case studies of how chemical stimuli can be used to control shape formation of soft materials. The first case demonstrates mismatch strain-driven curvilinear shape formation by folding of polymer films induced by differential swelling upon chemical stimulation. Experiments with combined top-down and bottom-up approach demonstrate capabilities to form various curvilinear shapes. Finite element modeling of these systems is used to guide the shape formation processes, leading potentially to origami folding. Another case involves controlling the polymerization of a gel in a confined configuration leading to buckled 3D configurations. Such polymerization (growth) induced 3D shape may be used to study complex shape formation processes of biological systems such as organs of complex shapes. Based on the mechanics understanding of these mechanical mechanisms, one can design different 3D shapes including origami.