Novel ceria PTFE composite coatings

Researchers report on the hydrophobicity and wear resistance of ceria/PTFE composite coatings.

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)

For the purposes of investigating the effects of ceria content on the anti-icing, hydrophobicity, and antiwear performances of ceria/polytetrafluoroethylene (PTFE) composite coatings, ceria/PTFE composite coatings with ceria mass fractions of 0%, 1%, 3%, 5%, and 7% were prepared via one-step spraying method.

Enhanced hydrophobicity

Experimental results show that the addition of ceria with a content of 5 wt% is the most effective to enhance hydrophobicity of the coatings, resulting from the coating surface structure, roughness, and intrinsic hydrophobicity of ceria. Moreover, the addition of ceria is helpful to the improvement of antiwear performances of PTFE composite coatings, when the content of ceria is 1–7 wt%.

Ceria/PTFE composite coatings with a ceria content of 5 wt% show a wear rate of 0.388 × 10−4 mm3/Nm, which is 80.6% lower than that of PTFE coating without ceria (2.000 × 10−4 mm3/Nm).

The study has been published in Journal of Coatings Technology and Research, Volume 17, 2020.

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