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Title: Photo-responsive liquid crystalline epoxy networks with exchangeable disulfide bonds

Abstract

The increasing demand for intelligent materials has driven the development of polymers with a variety of functionalities. However, combining multiple functionalities within one polymer is still challenging because of the difficulties encountered in coordinating different functional building blocks during fabrication. In this work, we demonstrate the fabrication of a multifunctional liquid crystalline epoxy network (LCEN) using the combination of thermotropic liquid crystals, photo-responsive azobenzene molecules, and exchangeable disulfide bonds. In addition to shape memory behavior enabled by the reversible liquid crystalline phase transition and photo-induced bending behavior resulting from the photo-responsive azobenzene molecules, the introduction of dynamic disulfide bonds into the LCEN resulted in a structurally dynamic network, allowing the reshaping, repairing, and recycling of the material.

Authors:
 [1];  [1];  [2];  [2]; ORCiD logo [3]
  1. Washington State Univ., Pullman, WA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Washington State Univ., Pullman, WA (United States); North Dakota State Univ., Fargo, ND (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A)
OSTI Identifier:
1399940
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
RSC Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 59; Journal ID: ISSN 2046-2069
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Li, Yuzhan, Zhang, Yuehong, Rios, Orlando, Keum, Jong K., and Kessler, Michael R. Photo-responsive liquid crystalline epoxy networks with exchangeable disulfide bonds. United States: N. p., 2017. Web. doi:10.1039/C7RA06343A.
Li, Yuzhan, Zhang, Yuehong, Rios, Orlando, Keum, Jong K., & Kessler, Michael R. Photo-responsive liquid crystalline epoxy networks with exchangeable disulfide bonds. United States. doi:10.1039/C7RA06343A.
Li, Yuzhan, Zhang, Yuehong, Rios, Orlando, Keum, Jong K., and Kessler, Michael R. Thu . "Photo-responsive liquid crystalline epoxy networks with exchangeable disulfide bonds". United States. doi:10.1039/C7RA06343A. https://www.osti.gov/servlets/purl/1399940.
@article{osti_1399940,
title = {Photo-responsive liquid crystalline epoxy networks with exchangeable disulfide bonds},
author = {Li, Yuzhan and Zhang, Yuehong and Rios, Orlando and Keum, Jong K. and Kessler, Michael R.},
abstractNote = {The increasing demand for intelligent materials has driven the development of polymers with a variety of functionalities. However, combining multiple functionalities within one polymer is still challenging because of the difficulties encountered in coordinating different functional building blocks during fabrication. In this work, we demonstrate the fabrication of a multifunctional liquid crystalline epoxy network (LCEN) using the combination of thermotropic liquid crystals, photo-responsive azobenzene molecules, and exchangeable disulfide bonds. In addition to shape memory behavior enabled by the reversible liquid crystalline phase transition and photo-induced bending behavior resulting from the photo-responsive azobenzene molecules, the introduction of dynamic disulfide bonds into the LCEN resulted in a structurally dynamic network, allowing the reshaping, repairing, and recycling of the material.},
doi = {10.1039/C7RA06343A},
journal = {RSC Advances},
issn = {2046-2069},
number = 59,
volume = 7,
place = {United States},
year = {2017},
month = {7}
}

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