High durability of non-fluorinated superhydrophobic nanocomposite coatings

S Gupta, A Babu, HS Arora, HS Grewal - Materials Letters, 2020 - Elsevier
Materials Letters, 2020Elsevier
In the present work, we developed eco-friendly and cost-effective nanocomposite coatings.
These wax-derived coatings showed high superhydrophobicity while exhibiting mechanical
and thermal robustness. The addition of nano-alumina particles in wax (Beeswax and
Paraffin) significantly enhanced de-wetting (contact angle~ 156°) with extremely low
hysteresis (< 5°). The Paraffin-based composite coating showed better thermal (up to 50° C)
and mechanical (Δ θ≈ 5°)(droplet impacts) stability than Beeswax counterpart, while also …
In the present work, we developed eco-friendly and cost-effective nanocomposite coatings. These wax-derived coatings showed high superhydrophobicity while exhibiting mechanical and thermal robustness. The addition of nano-alumina particles in wax (Beeswax and Paraffin) significantly enhanced de-wetting (contact angle~ 156°) with extremely low hysteresis (< 5°). The Paraffin-based composite coating showed better thermal (up to 50° C) and mechanical (Δ θ≈ 5°)(droplet impacts) stability than Beeswax counterpart, while also sustaining outdoor exposure. The superhydrophobic coatings showed self-cleaning ability with significantly low water consumption (< 1 μl/mm 2). We showed that nanocomposite-wax coatings possess required durability and are potential candidates for developing non-fluorinated self-cleaning surfaces.
Elsevier
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