Dynamic Bonds Reinforced Polyamide Elastomer for Biomedical Orthosis

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Please use this identifier to cite or link to this item: https://oar.a-star.edu.sg/communities-collections/articles/23170

Title:

Dynamic Bonds Reinforced Polyamide Elastomer for Biomedical Orthosis

Journal Title:

Advanced Science

DOI:

10.1002/advs.202504395

Publication URL:

https://doi.org/10.1002/advs.202504395

Authors:

Zhen Li, Peiyao Yan, Hao Wang, Yuancheng Zhang, Junhua Kong, Wei Zhao, Xin Li, Xiaomeng Zhang, Zhe Cui, Peng Fu, Xinchang Pang, Minying Liu, Chaobin He

Keywords:

Publication Date:

20 May 2025

Citation:

Li, Z., Yan, P., Wang, H., Zhang, Y., Kong, J., Zhao, W., Li, X., Zhang, X., Cui, Z., Fu, P., Pang, X., Liu, M., & He, C. (2025). Dynamic Bonds Reinforced Polyamide Elastomer for Biomedical Orthosis. Advanced Science, 12(30). Portico. https://doi.org/10.1002/advs.202504395

Abstract:

Abstract 4D printing of shape memory polymers (SMPs) allows the 3D‐printed structures to have adjustable shapes, properties, and functionalities, paving the way for intelligent devices and multifunctional applications. However, 4D‐printed SMPs face challenges due to mechanical anisotropy and mediocre shape memory performance hampered by weak interlayer adhesion. This study innovatively integrates shape memory polyamide elastomer with 4D printing technology to develop a multifunctional intelligent orthosis. Here, a dynamic bonds (DBs) reinforced shape memory polyamide elastomer is developed using a twin‐screw extruder through reactive extrusion. Dynamic covalent networks are introduced into polyamide elastomer, which enhances interlayer adhesion in 4D‐printed objects by utilizing combined effects of multiple dynamic covalent bonds (DCBs) and hierarchical hydrogen bonds (DHBs), leading to the reduction of mechanical anisotropy and improvement of the mechanical and shape memory properties of the 4D printouts. 4D‐printed objects demonstrated excellent macroscopic shape memory and reconfiguration, showcasing the versatility of this material, and the application for spinal orthosis is also demonstrated.

License type:

Attribution 4.0 International (CC BY 4.0)

Funding Info:

This research / project is supported by the National Research Foundation Singapore - Low-carbon energy research Phase 2
Grant Reference no. : U2307D4001

Description:

© 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited

URI:

https://oar.a-star.edu.sg/communities-collections/articles/23170

ISSN:

2198-3844
2198-3844

Collections:

Institute of Materials Research and Engineering

Files uploaded:

https://doi.org/10.1002/advs.202504395