Polydopamine/palygorskite hybrid-reinforced epoxy coatings adhered to a concrete surface
ISSN: 0369-9420
Article publication date: 18 December 2020
Issue publication date: 15 November 2021
Abstract
Purpose
The purpose of this study is to prepare a polydopamine (PDA)–palygorskite (Pal) hybrid-reinforced epoxy coating with high adhesion strength on wet concrete surface.
Design/methodology/approach
One synthetic step was adopted to prepare novel PDA–Pal hybrid epoxy coating. The process and product were analyzed and confirmed by FIRT, thermogravimetric analysis and scanning electron microscopy. The mass fraction of PDA–Pal hybrid affecting the adhesion strength of epoxy coating was analyzed and confirmed by pull-off test.
Findings
PDA–Pal hybrid mass fractions of 0, 1, 3 and 5 were added to the coatings. For a 5 Wt.% PDA–Pal hybrid content, the adhesive strengths on the saturated or underwater concrete surfaces increased to 4.0 and 2.5 MPa, respectively. In addition, the tensile mechanical property of the epoxy coating improved significantly after PDA–Pal addition.
Practical implications
This new epoxy coating hybrid by PDA–Pal could be applied as a concrete protective layer near water or in wet or damp environments.
Originality/value
Introduction of PDA–Pal hybrid to prepare epoxy coating with high adhesion strength on wet concrete surface has not been systematically studied previously.
Keywords
Acknowledgements
This work was supported financially by The National Basic Research Program of China (973 Program) (No. 2017YFB0309904), The Natural Science Foundation of Jiangsu Province (BK20170114) and the National Natural Science Foundation of China-Joint Fund of Shandong Province (U170620242). We thank International Science Editing (www.internationalscienceediting.com) for editing this manuscript.
Citation
Sun, D., Hou, P., Li, B., Yin, H. and Ran, Q. (2021), "Polydopamine/palygorskite hybrid-reinforced epoxy coatings adhered to a concrete surface", Pigment & Resin Technology, Vol. 50 No. 6, pp. 496-501. https://doi.org/10.1108/PRT-08-2020-0090
Publisher
:Emerald Publishing Limited
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