3D Printable and Reconfigurable Liquid Crystal Elastomers with Light-Induced Shape Memory via Dynamic Bond Exchange

Emily C. Davidson, Arda Kotikian, Shucong Li, Joanna Aizenberg, Jennifer A. Lewis

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

3D printable and reconfigurable liquid crystal elastomers (LCEs) that reversibly shape-morph when cycled above and below their nematic-to-isotropic transition temperature (TNI) are created, whose actuated shape can be locked-in via high-temperature UV exposure. By synthesizing LCE-based inks with light-triggerable dynamic bonds, printing can be harnessed to locally program their director alignment and UV light can be used to enable controlled network reconfiguration without requiring an imposed mechanical field. Using this integrated approach, 3D LCEs are constructed in both monolithic and heterogenous layouts that exhibit complex shape changes, and whose transformed shapes could be locked-in on demand.

Original languageEnglish (US)
Article number1905682
JournalAdvanced Materials
Volume32
Issue number1
DOIs
StatePublished - Jan 1 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • 3D printing
  • dynamic covalent bonds
  • light responsive
  • liquid crystal elastomers
  • shape memory

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