Shapeshifting: Reversible shape memory in semicrystalline elastomers
Abstract
We present a general strategy for enabling reversible shape transformation in semicrystalline shape memory (SM) materials, which integrates three different SM behaviors: conventional one-way SM, two-way reversible SM, and one-way reversible SM. While two-way reversible shape memory (RSM) is observed upon heating and cooling cycles, the one-way RSM occurs upon heating only. Shape reversibility is achieved through partial melting of a crystalline scaffold which secures memory of a temporary shape by leaving a latent template for recrystallization. This behavior is neither mechanically nor structurally constrained, thereby allowing for multiple switching between encoded shapes without applying any external force, which was demonstrated for different shapes including hairpin, coil, origami, and a robotic gripper. Fraction of reversible strain increases with cross-linking density, reaching a maximum of ca . 70%, and then decreases at higher cross-linking densities. This behavior has been shown to correlate with efficiency of securing the temporary shape.
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Contributions to stress-free two-way SMPs show the possibility of achieving complex reversible shape changes such as elongation/contraction, bending/unbending, and coiling/uncoiling, and of tuning the actuation temperature.
“Contributions to this class can be found, e.g., in [128-135], and show the possibility of achieving complex reversible shape changes (e.g., elongation/contraction, bending/unbending, coiling/uncoiling), and of tuning the actuation temperature.”
From Two-Way and Multiple-Way Shape Memory Polymers for Soft Robotics: An Overview (2020) · cites this paper as [129]
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- Authors
- Zhou, J., Turner, S. A., Brosnan, S. M., Li, Q., Carrillo, J.-M. Y., Nykypanchuk, D., Gang, O., Ashby, V. S., Dobrynin, A. V., & Sheiko, S. S.
- Affiliations
- University of North Carolina at Chapel Hill (US)
- University of Connecticut (US)
- Brookhaven National Laboratory (US)
- Corresponding author
- Sheiko, Sergei S.
- ORCID
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-02-25
- Volume
- 47
- Issue
- 5
- Pages
- 1768-1776
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2089065686
- Cited by
- 209
- References
- 45
- Citations by year
- 2026: 11 · 2025: 13 · 2024: 15 · 2023: 13 · 2022: 18 · 2021: 10 · 2020: 28 · 2019: 17 · 2018: 22 · 2017: 28 · 2016: 19 · 2015: 11 · 2014: 4
- FWCI
- 24.11
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecules (publishedVersion)
- Funders
- National Science Foundation (1122483, 1206957, 1004576)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Keywords
- shape memory polymers, two-way shape memory, partial melting, recrystallization, crosslink density, robotic gripper
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