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Waterborne organic silicone polyurethane with excellent self-healing performance for oil/water-separation and oil-recovery applications

Lookup NU author(s): Dr Peng Liu, Professor David XieORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

While superhydrophobic coatings have been widely used for surface modification and protection, most suffer from relatively short service life due to the lack of self-healing mechanisms. Herein, a new self-healable coating formulation based on waterborne organic silicone polyurethane has been proposed by integrating disulfide groups into polyurethane molecules. The bulk polyurethane material with disulfide groups shows high self-healing efficiency of up to 90.8%. The polyurethane coating on cotton fabric showed high superhydrophobic performance even after severe damage. Furthermore, the coating showed excellent self-healing ability. The damaged surface could self-heal after heating at 80 °C for half an hour. The coating also exhibited excellent superhydrophobicity and extremely high oil/water-separation efficiency, even after experiencing 80 washes or being worn 800 times. The combination of superior self-healing ability and superhydrophobic properties of the waterborne organic silicone polyurethane coating provides a general approach for the long-term application of such coatings in harsh environments.


Publication metadata

Author(s): Mao T, Feng H, Wu J, Li M, Luo S, Chen J, Wei X, Liu P, Xie F

Publication type: Article

Publication status: Published

Journal: Sustainable Materials and Technologies

Year: 2023

Volume: 36

Print publication date: 01/07/2023

Online publication date: 16/05/2023

Acceptance date: 12/05/2023

Date deposited: 25/05/2023

ISSN (print): 2214-9929

ISSN (electronic): 2214-9937

Publisher: Elsevier BV

URL: https://doi.org/10.1016/j.susmat.2023.e00631

DOI: 10.1016/j.susmat.2023.e00631

Notes: Gold OA publication


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Funding

Funder referenceFunder name
202102010453
202102010393
Guangzhou Science and Technology Plan Projects

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