Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide

Conventional shape memory polymers suffer the drawbacks of low thermal stability, low strength, and low shape recovery speed. In this study, main-chain liquid crystalline polyurethane (LCPU) that contains polar groups was synthesized. Graphene oxide (GO)/LCPU composite was fabricated using the solut...

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Detalles Bibliográficos
Autores principales: Li, Yueting, Lian, Huiqin, Hu, Yanou, Chang, Wei, Cui, Xiuguo, Liu, Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432439/
https://www.ncbi.nlm.nih.gov/pubmed/30974543
http://dx.doi.org/10.3390/polym8070236
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author Li, Yueting
Lian, Huiqin
Hu, Yanou
Chang, Wei
Cui, Xiuguo
Liu, Yang
author_facet Li, Yueting
Lian, Huiqin
Hu, Yanou
Chang, Wei
Cui, Xiuguo
Liu, Yang
author_sort Li, Yueting
collection PubMed
description Conventional shape memory polymers suffer the drawbacks of low thermal stability, low strength, and low shape recovery speed. In this study, main-chain liquid crystalline polyurethane (LCPU) that contains polar groups was synthesized. Graphene oxide (GO)/LCPU composite was fabricated using the solution casting method. The tensile strength of GO/LCPU was 1.78 times that of neat LCPU. In addition, shape recovery speed was extensively improved. The average recovery rate of sample with 20 wt % GO loading was 9.2°/s, much faster than that of LCPU of 2.6°/s. The enhancement in mechanical property and shape memory behavior could be attributed to the structure of LCPU and GO, which enhanced the interfacial interactions between GO and LCPU.
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spelling pubmed-64324392019-04-02 Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide Li, Yueting Lian, Huiqin Hu, Yanou Chang, Wei Cui, Xiuguo Liu, Yang Polymers (Basel) Article Conventional shape memory polymers suffer the drawbacks of low thermal stability, low strength, and low shape recovery speed. In this study, main-chain liquid crystalline polyurethane (LCPU) that contains polar groups was synthesized. Graphene oxide (GO)/LCPU composite was fabricated using the solution casting method. The tensile strength of GO/LCPU was 1.78 times that of neat LCPU. In addition, shape recovery speed was extensively improved. The average recovery rate of sample with 20 wt % GO loading was 9.2°/s, much faster than that of LCPU of 2.6°/s. The enhancement in mechanical property and shape memory behavior could be attributed to the structure of LCPU and GO, which enhanced the interfacial interactions between GO and LCPU. MDPI 2016-07-19 /pmc/articles/PMC6432439/ /pubmed/30974543 http://dx.doi.org/10.3390/polym8070236 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Yueting
Lian, Huiqin
Hu, Yanou
Chang, Wei
Cui, Xiuguo
Liu, Yang
Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide
title Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide
title_full Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide
title_fullStr Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide
title_full_unstemmed Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide
title_short Enhancement in Mechanical and Shape Memory Properties for Liquid Crystalline Polyurethane Strengthened by Graphene Oxide
title_sort enhancement in mechanical and shape memory properties for liquid crystalline polyurethane strengthened by graphene oxide
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432439/
https://www.ncbi.nlm.nih.gov/pubmed/30974543
http://dx.doi.org/10.3390/polym8070236
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