Water resistant fibre/matrix interface in a degradable composite: Synergistic effects of heat treatment and polydopamine coating

Felfel, Reda M.; Parsons, Andrew J.; Chen, Menghao; Stuart, Bryan W.; Wadge, Matthew D.; Grant, David M.

Abstract

Retaining a robust fibre-matrix interface in an aqueous environment has been an enduring challenge for fibre-reinforced biocomposites. This study addresses the issue by applying a polydopamine coating as a coupling agent to annealed and non-annealed phosphate-based glass fibres. The presence of the polydopamine coating was confirmed using X-ray photoelectron spectroscopy and Raman techniques. The thickness of the coating increased with treatment time, forming a bimodal structure, and showed good correlation with the percentage of surface nitrogen observed via XPS. A 6 h coating period was selected to balance fibre strength improvements against degradation caused by the aqueous coating solution. In-situ polymerised polycaprolactone composites were produced using the fibres, resulting in improved retention of strength and modulus when the fibres were both annealed and coated. This is the first example of long-term retention of wet strength properties for phosphate-based glass fibre composites, falling within the target range for bone healing (6–12 weeks).

Citation

Felfel, R. M., Parsons, A. J., Chen, M., Stuart, B. W., Wadge, M. D., & Grant, D. M. (2021). Water resistant fibre/matrix interface in a degradable composite: Synergistic effects of heat treatment and polydopamine coating. Composites Part A: Applied Science and Manufacturing, 146, Article 106415. https://doi.org/10.1016/j.compositesa.2021.106415

• Journal Article Type: Article
• Acceptance Date: Apr 3, 2021
• Online Publication Date: Apr 15, 2021
• Publication Date: Jul 1, 2021
• Deposit Date: Apr 20, 2021
• Publicly Available Date: Apr 16, 2022
• Journal: Composites Part A: Applied Science and Manufacturing
• Print ISSN: 1359-835X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 146
• Article Number: 106415
• DOI: https://doi.org/10.1016/j.compositesa.2021.106415
• Keywords: Mechanics of Materials; Ceramics and Composites
• Public URL: https://nottingham-repository.worktribe.com/output/5470032
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1359835X2100138X