Facile synthesis of high-performance and self-healing polyurethane-urea nanocomposites reinforced with graphene
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(Published version)
Date
2024
Authors
Meng, Q.
Xu, Z.
Yu, Y.
Li, Y.
Diaby, A.L.
Araby, S.
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Journal article
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Nano Materials Science, online, 2024; online(1):1-14
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Abstract
In this study, a facile method was employed to synthesize strong, yet highly elastic polyurethane-urea (PUU) with typical characteristics and 94 % optical transmittance. Graphene platelets (GNPs) were prepared and modified via a scalable and eco-friendly mechanochemical approach. The produced GNPs is at 1.6-nm thickness with high electrical conductivity of ∼950 S/m. The structure-property relations of PUU/GNP nanocomposites were comprehensively investigated through morphology and mechanical properties measurements. The strong interface and high-density hydrogen bonds between modified GNPs (M-GNPs) and PUU significantly enhanced the mechanical properties of the PUU nanocomposite. The PUU composite showed 66.7 % and 36.2 % increments in tensile and impact strengths, respectively, at 0.2 wt% M-GNPs. The reversible hydrogen bond between M-GNPs and PUU endowed the nanocomposite with self-healing properties achieving 97.8 % healing efficiency of the strength after 5 h at 120 °C. This study demonstrates the importance of surface modification and provides a simple yet robust approach for preparing high-performance and functional PUU/graphene composites.
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Data source: supplementary data, https://doi.org/10.1016/j.nanoms.2024.08.007
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Copyright 2024 Chongqing University. (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Access Condition Notes: This is an open access article under the CCBY-NC-ND license.