Surface‐Enforced Alignment of Reprogrammable Liquid Crystalline Elastomers

Hebner, Tayler S.; Kirkpatrick, Bruce E.; Anseth, Kristi S.; Bowman, Christopher N.; White, Timothy J.

doi:10.1002/advs.202204003

Title: Surface‐Enforced Alignment of Reprogrammable Liquid Crystalline Elastomers

Abstract

Abstract Liquid crystalline elastomers (LCEs) are stimuli‐responsive materials capable of undergoing large deformations. The thermomechanical response of LCEs is attributable to the coupling of polymer network properties and disruption of order between liquid crystalline mesogens. Complex deformations have been realized in LCEs by either programming the nematic director via surface‐enforced alignment or localized mechanical deformation in materials incorporating dynamic covalent chemistries. Here, the preparation of LCEs via thiol‐Michael addition reaction is reported that are amenable to surface‐enforced alignment. Afforded by the thiol‐Michael addition reaction, dynamic covalent bonds are uniquely incorporated in chemistries subject to surface‐enforce alignment. Accordingly, LCEs prepared with complex director profiles are able to be programmed and reprogrammed by (re)activating the dynamic covalent chemistry to realize distinctive shape transformations.

Authors:

Hebner, Tayler S. ^[1]; Kirkpatrick, Bruce E. ^[2]; Anseth, Kristi S. ^[3]; Bowman, Christopher N. ^[3];

^[3]

Department of Chemical and Biological Engineering University of Colorado Boulder CO 80303 USA
Department of Chemical and Biological Engineering University of Colorado Boulder CO 80303 USA, Medical Scientist Training Program University of Colorado Anschutz Medical Campus Aurora CO 80045 USA
Department of Chemical and Biological Engineering University of Colorado Boulder CO 80303 USA, Materials Science and Engineering Program University of Colorado Boulder CO 80303 USA

Publication Date:: Sun Aug 21 00:00:00 EDT 2022

Sponsoring Org.:: USDOE

OSTI Identifier:: 1882791

Alternate Identifier(s):: OSTI ID: 1882792

Resource Type:: Published Article

Journal Name:: Advanced Science

Additional Journal Information:: Journal Name: Advanced Science Journal Volume: 9 Journal Issue: 29; Journal ID: ISSN 2198-3844

Publisher:: Wiley Blackwell (John Wiley & Sons)

Country of Publication:: Germany

Language:: English

Citation Formats


                    Hebner, Tayler S., Kirkpatrick, Bruce E., Anseth, Kristi S., Bowman, Christopher N., and White, Timothy J. Surface‐Enforced Alignment of Reprogrammable Liquid Crystalline Elastomers.  Germany: N. p., 2022. 
Web.  doi:10.1002/advs.202204003.

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                    Hebner, Tayler S., Kirkpatrick, Bruce E., Anseth, Kristi S., Bowman, Christopher N., & White, Timothy J. Surface‐Enforced Alignment of Reprogrammable Liquid Crystalline Elastomers.  Germany.  https://doi.org/10.1002/advs.202204003

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                    Hebner, Tayler S., Kirkpatrick, Bruce E., Anseth, Kristi S., Bowman, Christopher N., and White, Timothy J. Sun .  
"Surface‐Enforced Alignment of Reprogrammable Liquid Crystalline Elastomers".  Germany.  https://doi.org/10.1002/advs.202204003.

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@article{osti_1882791,

  title        = {Surface‐Enforced Alignment of Reprogrammable Liquid Crystalline Elastomers},

  author       = {Hebner, Tayler S. and Kirkpatrick, Bruce E. and Anseth, Kristi S. and Bowman, Christopher N. and White, Timothy J.},

  abstractNote = {Abstract Liquid crystalline elastomers (LCEs) are stimuli‐responsive materials capable of undergoing large deformations. The thermomechanical response of LCEs is attributable to the coupling of polymer network properties and disruption of order between liquid crystalline mesogens. Complex deformations have been realized in LCEs by either programming the nematic director via surface‐enforced alignment or localized mechanical deformation in materials incorporating dynamic covalent chemistries. Here, the preparation of LCEs via thiol‐Michael addition reaction is reported that are amenable to surface‐enforced alignment. Afforded by the thiol‐Michael addition reaction, dynamic covalent bonds are uniquely incorporated in chemistries subject to surface‐enforce alignment. Accordingly, LCEs prepared with complex director profiles are able to be programmed and reprogrammed by (re)activating the dynamic covalent chemistry to realize distinctive shape transformations.},

  doi          = {10.1002/advs.202204003},

  journal      = {Advanced Science},

  number       = 29,

  volume       = 9,

  place        = {Germany},

  year         = {Sun Aug 21 00:00:00 EDT 2022},

  month        = {Sun Aug 21 00:00:00 EDT 2022}

}

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Title: Surface‐Enforced Alignment of Reprogrammable Liquid Crystalline Elastomers

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Programmable and adaptive mechanics with liquid crystal polymer networks and elastomers
journal, October 2015

Phase-Separated Thiol–Epoxy–Acrylate Hybrid Polymer Networks with Controlled Cross-Link Density Synthesized by Simultaneous Thiol–Acrylate and Thiol–Epoxy Click Reactions
journal, May 2016

Polymer Network Structure, Properties, and Formation of Liquid Crystalline Elastomers Prepared via Thiol–Acrylate Chain Transfer Reactions
journal, November 2021

Reprogrammable, Reprocessible, and Self-Healable Liquid Crystal Elastomer with Exchangeable Disulfide Bonds
journal, September 2017

Exchangeable Liquid Crystalline Elastomers and Their Applications
journal, February 2021

A readily programmable, fully reversible shape-switching material
journal, August 2018

Liquid‐Crystalline Soft Actuators with Switchable Thermal Reprogrammability
journal, February 2020

Adaptable liquid crystal elastomers with transesterification-based bond exchange reactions
journal, January 2018

Tailorable and programmable liquid-crystalline elastomers using a two-stage thiol–acrylate reaction
journal, January 2015

Programmed liquid crystal elastomers with tunable actuation strain
journal, January 2015

Bioinspired Phototropic MXene‐Reinforced Soft Tubular Actuators for Omnidirectional Light‐Tracking and Adaptive Photovoltaics
journal, March 2022