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Title: Photoresponsive Liquid Crystalline Epoxy Networks with Shape Memory Behavior and Dynamic Ester Bonds

Abstract

Functional polymers are intelligent materials that can respond to a variety of external stimuli. However, these materials have not yet found widespread real world applications because of the difficulties in fabrication and the limited number of functional building blocks that can be incorporated into a material. Here, we demonstrate a simple route to incorporate three functional building blocks (azobenzene chromophores, liquid crystals, and dynamic covalent bonds) into an epoxy-based liquid crystalline network (LCN), in which an azobenzene-based epoxy monomer is polymerized with an aliphatic dicarboxylic acid to create exchangeable ester bonds that can be thermally activated. Lastly, all three functional building blocks exhibited good compatibility, and the resulting materials exhibits various photomechanical, shape memory, and self-healing properties because of the azobenzene molecules, liquid crystals, and dynamic ester bonds, respectively.

Authors:
 [1];  [2];  [3];  [3];  [1]
  1. School of Mechanical and Materials Engineering, Washington State University, PO Box 642920, Pullman, Washington 99164-2920, United States
  2. Deposition Sciences Group, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
  3. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Critical Materials Institute (CMI)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1256126
Alternate Identifier(s):
OSTI ID: 1256829
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Name: ACS Applied Materials and Interfaces Journal Volume: 8 Journal Issue: 24; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; liquid crystalline networks; photoresponsive; shape memory; self-healing; thermomechanical properties

Citation Formats

Li, Yuzhan, Rios, Orlando, Keum, Jong K., Chen, Jihua, and Kessler, Michael R. Photoresponsive Liquid Crystalline Epoxy Networks with Shape Memory Behavior and Dynamic Ester Bonds. United States: N. p., 2016. Web. doi:10.1021/acsami.6b04374.
Li, Yuzhan, Rios, Orlando, Keum, Jong K., Chen, Jihua, & Kessler, Michael R. Photoresponsive Liquid Crystalline Epoxy Networks with Shape Memory Behavior and Dynamic Ester Bonds. United States. doi:10.1021/acsami.6b04374.
Li, Yuzhan, Rios, Orlando, Keum, Jong K., Chen, Jihua, and Kessler, Michael R. Wed . "Photoresponsive Liquid Crystalline Epoxy Networks with Shape Memory Behavior and Dynamic Ester Bonds". United States. doi:10.1021/acsami.6b04374.
@article{osti_1256126,
title = {Photoresponsive Liquid Crystalline Epoxy Networks with Shape Memory Behavior and Dynamic Ester Bonds},
author = {Li, Yuzhan and Rios, Orlando and Keum, Jong K. and Chen, Jihua and Kessler, Michael R.},
abstractNote = {Functional polymers are intelligent materials that can respond to a variety of external stimuli. However, these materials have not yet found widespread real world applications because of the difficulties in fabrication and the limited number of functional building blocks that can be incorporated into a material. Here, we demonstrate a simple route to incorporate three functional building blocks (azobenzene chromophores, liquid crystals, and dynamic covalent bonds) into an epoxy-based liquid crystalline network (LCN), in which an azobenzene-based epoxy monomer is polymerized with an aliphatic dicarboxylic acid to create exchangeable ester bonds that can be thermally activated. Lastly, all three functional building blocks exhibited good compatibility, and the resulting materials exhibits various photomechanical, shape memory, and self-healing properties because of the azobenzene molecules, liquid crystals, and dynamic ester bonds, respectively.},
doi = {10.1021/acsami.6b04374},
journal = {ACS Applied Materials and Interfaces},
number = 24,
volume = 8,
place = {United States},
year = {2016},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acsami.6b04374

Citation Metrics:
Cited by: 21 works
Citation information provided by
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Works referencing / citing this record:

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3D printable robust shape memory PET copolyesters with fire safety via π-stacking and synergistic crosslinking
journal, January 2019

  • Chen, Lin; Zhao, Hai-Bo; Ni, Yan-Peng
  • Journal of Materials Chemistry A, Vol. 7, Issue 28
  • DOI: 10.1039/c9ta04187g

3D and 4D Printing of Polymers for Tissue Engineering Applications
journal, July 2019

  • Tamay, Dilara Goksu; Dursun Usal, Tugba; Alagoz, Ayse Selcen
  • Frontiers in Bioengineering and Biotechnology, Vol. 7
  • DOI: 10.3389/fbioe.2019.00164