A readily programmable, fully reversible shape-switching material

Science Advances
Matthew K McBrideChristopher N Bowman

Abstract

Liquid crystalline (LC) elastomers (LCEs) enable large-scale reversible shape changes in polymeric materials; however, they require intensive, irreversible programming approaches in order to facilitate controllable actuation. We have implemented photoinduced dynamic covalent chemistry (DCC) that chemically anneals the LCE toward an applied equilibrium only when and where the light-activated DCC is on. By using light as the stimulus that enables programming, the dynamic bond exchange is orthogonal to LC phase behavior, enabling the LCE to be annealed in any LC phase or in the isotropic phase with various manifestations of this capability explored here. In a photopolymerizable LCE network, we report the synthesis, characterization, and exploitation of readily shape-programmable DCC-functional LCEs to create predictable, complex, and fully reversible shape changes, thus enabling the literal square peg to fit into a round hole.

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Citations

Jul 17, 2019·Angewandte Chemie·Yuwei GuJeremiah A Johnson
Mar 14, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Zhibin WenJean-Marie Raquez
Nov 2, 2019·Angewandte Chemie·Nathaniel CorriganCyrille Boyer
Oct 6, 2019·Nature Communications·Bo ZuoHong Yang
Dec 20, 2019·Advanced Materials·Zunzhen MingJinyao Liu
Mar 7, 2020·Advanced Materials·Joselle M McCrackenTimothy J White
Jun 20, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Zhijian Wang, Shengqiang Cai
Jun 10, 2020·Chemical Communications : Chem Comm·Meng WangHong Yang
Mar 19, 2019·Annual Review of Chemical and Biomolecular Engineering·Matthew K McBrideChristopher N Bowman
Dec 29, 2020·Macromolecular Rapid Communications·Christian TaplanFilip E Du Prez
Jan 31, 2021·Polymers·Larissa HammerRenaud Nicolaÿ
Feb 19, 2021·Chemical Reviews·Mohand O SaedEugene M Terentjev
Jun 20, 2021·Advanced Materials·Weike ZouEugene M Terentjev
Aug 19, 2020·ACS Applied Materials & Interfaces·Rob C P VerpaalenMichael G Debije
Aug 21, 2019·Journal of the American Chemical Society·Hai-Feng LuHong Yang
Oct 31, 2021·Advanced Materials·Marc Del PozoMichael G Debije
Jan 11, 2022·ACS Applied Materials & Interfaces·Kezi ChengDavid R Clarke
Jan 21, 2022·ACS Applied Materials & Interfaces·Rui WangXiaoguang Zhao
Feb 8, 2022·ACS Applied Materials & Interfaces·Xinhong XiongJiaxi Cui

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Methods Mentioned

BETA
infrared spectroscopy
AFM
light scattering
Atomic force microscopy
nuclear magnetic resonance
irradiating

Software Mentioned

ImageJ
AFT

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