Skip to main content

Research Repository

Advanced Search

Bio-inspired self-healing polymer foams with bilayered capsule systems

Cao, Shunze; Zhu, Wen; Liu, Tao

Authors

Shunze Cao

Wen Zhu

TAO LIU Tao.Liu@nottingham.ac.uk
Assistant Professor



Abstract

Bio-inspired, self-healing polymer foams containing novel calcium-alginate capsule system was developed for load-bearing application. The capsules were created by a multi-stage encapsulating process that can encapsulate two mutually reactive healing agents within single capsules. The capsules had a bilayered structure with the epoxy resin encapsulated within the inner layer and the hardener within the outer layer. To evaluate the mechanical self-healing performance, the following tests were conducted, i.e. (1) cyclic quasi-static compression tests for foams; (2) quasi-static three-point bending for foam core sandwich beams; and (3) high-speed soft impact for foam core sandwich beams. Cyclic quasi-static compression tests demonstrated (1) bilayered capsule systems had better multiple self-healing effect compared to the dual capsule system without external interventions; and (2) bilayered capsules could enhance the stiffness and strength of foams. For foam core sandwich beams, the bilayered capsules did not have a noticeable effect on the effective stiffness of the beams; however, it could provide a noticeable self–healing effect when the damage occurred. The images obtained from scanning electron microscope (SEM) and X-ray microcomputed tomography (μCT) suggest that the micro-cracks induced by the static and impact loading were either fully or partially healed by the released healing agents without external interventions.

Citation

Cao, S., Zhu, W., & Liu, T. (2020). Bio-inspired self-healing polymer foams with bilayered capsule systems. Composites Science and Technology, 195, https://doi.org/10.1016/j.compscitech.2020.108189

Journal Article Type Article
Acceptance Date Apr 8, 2020
Online Publication Date Apr 19, 2020
Publication Date Jul 28, 2020
Deposit Date Apr 22, 2020
Publicly Available Date Apr 20, 2021
Journal Composites Science and Technology
Print ISSN 0266-3538
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 195
Article Number 108189
DOI https://doi.org/10.1016/j.compscitech.2020.108189
Keywords General Engineering; Ceramics and Composites
Public URL https://nottingham-repository.worktribe.com/output/4327455
Publisher URL https://www.sciencedirect.com/science/article/abs/pii/S0266353819329823