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Thursday, 26 November 2020
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Raw materials & technologies, Applications

Anti-corrosion reinforcement of water-borne polyurethane coating

Friday, 20 November 2020

Researchers describe the anti-corrosion reinforcement of a water-borne polyurethane coating with polymerised graphene oxide.

The anti-corrosion performance of a composite coating DPPGO has been significantly improved. Image source:  abet – stock.adobe.com (symbol image).
The anti-corrosion performance of a composite coating DPPGO has been significantly improved. Image source:  abet – stock.adobe.com (symbol ima...

The research and preparation of excellent anti-corrosion coatings is still a difficult task and critical to practical applications. In a new paper, phosphoric acid, dodecylbenzenesulfonic acid (DBSA), and polyaniline (PANI) were polymerised in-situ onto graphene oxide (GO) by the one-pot method to prepare dodecylbenzenesulfonic acid-PANI/phosphorylated graphene oxide (DPPGO).

Significantly improved anti-corrosion performance

The results of TEM, FTIR, Raman spectrum, XRD, TGA, and XPS analysis showed that the DPPGO was successfully prepared. The SEM observations showed that DPPGO has best dispersibility and compatibility than GO and PANI/phosphorylated graphene oxide (PPGO) in water-borne polyurethane (WPU) matrix. To achieve anti-corrosion performance, a new type of graphene-based polymer nanocomposites water-based coating was developed and tested by electrochemical measurements.

Through a series of electrochemical tests, it is concluded that the anti-corrosion performance of a composite coating DPPGO is significantly improved. The excellent anti-corrosion properties are due to the perfect dispersion and good compatibility of DPPGO in WPU.

The study can be found in Journal of Materials Science volume 56, 2021.

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