Cited by 1,380Advanced Materials and MechanicsPolymer composites and self-healingDielectric materials and actuators

Tunable polymer multi-shape memory effect

Xie, Tao·2010·Nature

Abstract

Shape memory polymers are materials that can memorize temporary shapes and revert to their permanent shape upon exposure to an external stimulus such as heat, light, moisture or magnetic field. Such properties have enabled a variety of applications including deployable space structures, biomedical devices, adaptive optical devices, smart dry adhesives and fasteners. The ultimate potential for a shape memory polymer, however, is limited by the number of temporary shapes it can memorize in each shape memory cycle and the ability to tune the shape memory transition temperature(s) for the targeted applications. Currently known shape memory polymers are capable of memorizing one or two temporary shapes, corresponding to dual- and triple-shape memory effects (also counting the permanent shape), respectively. At the molecular level, the maximum number of temporary shapes a shape memory polymer can memorize correlates directly to the number of discrete reversible phase transitions (shape memory transitions) in the polymer. Intuitively, one might deduce that multi-shape memory effects are achievable simply by introducing additional reversible phase transitions. The task of synthesizing a polymer with more than two distinctive and strongly bonded reversible phases, however, is extremely challenging. Tuning shape memory effects, on the other hand, is often achieved through tailoring the shape memory transition temperatures, which requires alteration in the material composition. Here I show that the perfluorosulphonic acid ionomer (PFSA), which has only one broad reversible phase transition, exhibits dual-, triple-, and at least quadruple-shape memory effects, all highly tunable without any change to the material composition.

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Crossref · 10.1038/nature08863

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26 of 26 references verified0 citation errors · 0 not checkable

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  • The temperature-memory effect approach has been largely employed to achieve multiple-way SMPs with a broad glass transition or a broad melting transition as the switching transition.

    “Such an approach has been largely employed to achieve multiple-way SMPs with a broad glass transition [82-92] and a broad melting transition [93-95] as the switching transition.”
  • This autonomous multi-shape transformation is drastically different from existing examples that would otherwise require complex stimulation schemes (e.g. multi-step heating) that are difficult to implement for many applications.

    “This autonomous multi-shape transformation is drastically different from existing examples that would otherwise require complexed stimulation schemes (e.g. multi-step heating 17,18 ) that are difficult to implement for many applications.”

    From Shape memory polymer with programmable recovery onset (2023) · cites this paper as [17]

  • Kratz et al. demonstrated the temperature-memory effect of SMPs with crystalline phase switching transition, although stepwise SME was not studied.

    “Kratz et al. [460] demonstrated the temperature-memory effect of SMPs with crystalline phase switching transition [461,462] although stepwise SME was not studied.”
  • This triple-shape behavior has a key distinction with currently known triple-shape examples for which both temporary shapes are typically determined by the programming force(s).

    “This triple-shape behavior has a key distinction with currently known triple-shape examples for which both temporary shapes are typically determined by the programming force(s)37,38.”
  • The t-SME of Nafion displayed a dual-step programming process at any two sufficiently separated deformation temperatures above the onset of the Tg.

    “The t-SME displayed dual-step programming process at any two sufficiently separated deformation temperatures above the onset of the Tg.”

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Authors
Xie, T.
Affiliations
General Motors (United States) (US)
Corresponding author
Xie, Tao
Venue
Nature
Published
2010-03
Volume
464
Issue
7286
Pages
267-270
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2119812250
Cited by
1,380
References
26
Citations by year
2026: 45 · 2025: 66 · 2024: 68 · 2023: 66 · 2022: 103 · 2021: 110 · 2020: 118 · 2019: 137 · 2018: 100 · 2017: 114 · 2016: 102 · 2015: 87 · 2014: 82 · 2013: 70 · 2012: 49
FWCI
110.19
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
  • Physical Sciences › Engineering › Biomedical Engineering › Dielectric materials and actuators
Keywords
shape memory polymers, Nafion, reversible phase transition, proton exchange membranes, smart materials

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