Superhydrophobic coating with multiscale structures

To obtain a superhydrophobic surface with hierarchical micro/nanostructures, two kinds of SiO2 nanoparticles with different sizes were embedded into crosslinked silanised polyacrylate. The developed coatings showed three outstanding characteristics.

Superhydrophobic coating with multiscale structures. Source: Rainer Schmittchen - -

Silanised polyacrylate (PSA) was synthesised via free radical copolymerisation of acrylate monomers and vinyltrimethoxysilane (VTMS). Then, the silicone methoxyls of the VTMS units were crosslinked by a condensation reaction with hydroxy terminated polydimethylsiloxane (HTPDMS) to form crosslinked silanised polyacrylate (CPSA).

High corrosion resistance

The surface wetting property, surface morphology, mechanical robustness and anticorrosion performance of the CPSA/SiO2 coatings were systematically studied. The results demonstrated that the coatings could be expediently sprayed onto substrates to create a water-repellent surface, and possessed good mechanical robustness and high corrosion resistance against NaCl solutions.

The study is published in: Surface and Coatings Technology, Volume 331, 15 December 2017.

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