Novel method for antistatic and antibacterial coatings

Reserchers describe the production of an antistatic and antibacterial two-component waterborne polyurethane coating.

A laboratory scene.
The addition of ceria with a content of 5 wt% was the most effective to enhance hydrophobicity. Image source: totojang1977 (symbol image)

Hydroxyl acrylate emulsion was prepared firstly by the semicontinuous seeded emulsion polymerisation, and then adding polyaniline (PANI)/Cu/ZrO2 ternary nanocomposites, two-component waterborne polyurethane (2 K WPU) composite coatings with antistatic and antibacterial properties were obtained by mixing the emulsion with hydrophilic modified polyisocyanate.

Increased properties

Test results showed that the addition of the ternary nanocomposites increased the antistatic, antibacterial, anticorrosion, and mechanical properties of the 2 K WPU coating. The initial decomposition temperature increased from 200 to 225°C, and the tensile strength increased by 44.4%. The coatings still maintained good impact strength of 50/50 kg cm, adhesion of grade 2, flexibility of 1 mm, pendulum hardness of 293 s, and the gloss (60°) of 119.4.

The study has been published in Journal of Coatings Technology and Research, Volume 20, Issue 3, May 2023.

Event tip

Water-based systems are also the focus of the EC Conference Bio-based and Water-based Coatings on November 14 and 15 in Berlin, Germany. At the conference you will learn about the latest developments in bio-based and water-based coatings.

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