Cited by 74Advanced Materials and MechanicsPolymer composites and self-healingPhotochromic and Fluorescence Chemistry

Rapid, Localized, and Athermal Shape Memory Performance Triggered by Photoswitchable Glass Transition Temperature

Zhang, Xiao, Zhu, Chongyu, Xu, Bo, Qin, Lang, Wei, Jia, Yu, Yanlei·2019·ACS Applied Materials & Interfaces

Abstract

Shape memory polymers that undergo shape recovery at room temperature (RT) are desirable for their potential in vivo applications, yet challenging. Herein, light-triggered athermal shape memory effect of azopolymer networks is reported by photoswitching the glass transition temperature ( T g ) rather than external heating. Thanks to the switchable T g of azopolymer induced by reversible trans–cis isomerization, the entropic energy is trapped in low T g state ( cis -form T g < RT) to deform into a temporary shape and fixed in high T g state ( trans -form T g > RT). Upon exposure to UV light, the reduced low T g allows release of the entropic energy, realizing athermal shape recovery of the permanent shape. By exploring the shape memory performance, we demonstrate diverse light-induced rapid shape recovery from temporary shape to original shape. Because of the instant, precise, and spatiotemporal manipulation of light, programmable shape recovery of surface topography is further extended. We anticipate that this strategy will provide tremendous opportunities for future precise medicine devices and soft robotics.

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Crossref · 10.1021/acsami.9b17271

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48 of 48 references verified0 citation errors · 0 not checkable

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  • Typically, the shape transformation of SMP starts as soon as a stimulus is exerted.

    “Typically, the shape transformation starts as soon as a stimulus is exerted 14 .”

    From Shape memory polymer with programmable recovery onset (2023) · cites this paper as [14]

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Authors
Zhang, X., Zhu, C., Xu, B., Qin, L., Wei, J., & Yu, Y.
Affiliations
Fudan University (CN)
Corresponding author
Yu, Yanlei
Venue
ACS Applied Materials & Interfaces
Published
2019-11-13
Volume
11
Issue
49
Pages
46212-46218
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2989136100
Cited by
74
References
48
Citations by year
2026: 2 · 2025: 8 · 2024: 12 · 2023: 13 · 2022: 21 · 2021: 10 · 2020: 7 · 2019: 1
FWCI
5.48
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Applied Materials & Interfaces (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (21734003)
  • National Key R&D Program of China (2016YFA0202902)
  • Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-07-E00027)
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 › Materials Chemistry › Photochromic and Fluorescence Chemistry
Keywords
shape memory polymers, trans-cis isomerization, soft robotics

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