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Design of Surface-Aligned Main-Chain Liquid-Crystal Networks Prepared under Ambient, Light-Free Conditions Using the Diels–Alder Cycloaddition

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Bibliographic Details
Title: Design of Surface-Aligned Main-Chain Liquid-Crystal Networks Prepared under Ambient, Light-Free Conditions Using the Diels–Alder Cycloaddition
Authors: Minwook Park, Friedrich Stricker, Jesus Guillen Campos, Kyle D. Clark, Jaejun Lee, Younghoon Kwon, Megan T. Valentine, Javier Read de Alaniz
Source: ACS Macro Letters. 12:33-39
Publisher Information: American Chemical Society (ACS), 2022.
Publication Year: 2022
Subject Terms: Cycloaddition Reaction, 02 engineering and technology, 0210 nano-technology, 01 natural sciences, Liquid Crystals, 0104 chemical sciences
Description: Surface-aligned liquid-crystal networks (LCNs) offer a solution for developing functional materials capable of performing a range of tasks, including actuation, shape memory, and surfaces patterning. Here we show that Diels-Alder cycloaddition can be used to prepare the backbone of planar aligned LCNs under mild ambient conditions without the addition of additives or UV irradiation. The mechanical properties of the networks have robust viscoelastic modulus and stiffness with a reversible local free volume change upon physical aging. This study shows new opportunities to design surface-aligned LCNs based on additive free step-growth Diels-Alder polymerization and enables the potential to incorporate a wider range of photochromic materials into LCNs.
Document Type: Article
Language: English
ISSN: 2161-1653
DOI: 10.1021/acsmacrolett.2c00616
Access URL: https://pubmed.ncbi.nlm.nih.gov/36541858
Rights: STM Policy #29
Accession Number: edsair.doi.dedup.....fe4516cc29ee719d284226aea889724f
Database: OpenAIRE
Description
Abstract:Surface-aligned liquid-crystal networks (LCNs) offer a solution for developing functional materials capable of performing a range of tasks, including actuation, shape memory, and surfaces patterning. Here we show that Diels-Alder cycloaddition can be used to prepare the backbone of planar aligned LCNs under mild ambient conditions without the addition of additives or UV irradiation. The mechanical properties of the networks have robust viscoelastic modulus and stiffness with a reversible local free volume change upon physical aging. This study shows new opportunities to design surface-aligned LCNs based on additive free step-growth Diels-Alder polymerization and enables the potential to incorporate a wider range of photochromic materials into LCNs.
ISSN:21611653
DOI:10.1021/acsmacrolett.2c00616