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Water-Repellent Fluoropolymer-Based Coatings

1
Bio-colloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, Campus de Fuentenueva s/n, ES 18071 Granada, Spain
2
Department of Mechanical Engineering, University of Cordoba, Campus de Rabanales, Ctra. Madrid-Cádiz km 396, ES14071 Córdoba, Spain
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(5), 293; https://doi.org/10.3390/coatings9050293
Received: 25 February 2019 / Revised: 5 April 2019 / Accepted: 26 April 2019 / Published: 28 April 2019
(This article belongs to the Special Issue Anti-Adhesive Surfaces)
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Abstract

Fluoropolymer-based coatings are widely used for release applications. However, these hydrophobic surfaces do not reveal a significantly low adhesion. Water repellency incorporated to fluoropolymer coatings might enhance their release performance. In this work, we focused on the surface texturing of a well-known polytetrafluoroethylene (PTFE)-based coating. We explored as texturing routes: sanding, sandblasting and laser ablation. We examined the surface roughness with white light confocal microscopy and the surface morphology with environmental scanning electron microscopy (ESEM). Water-repellent fluoropolymer coatings were reproduced in all cases, although with different degree, parametrized with bounces of water drops (4–5 μL). Laser ablation enabled the lowest adhesion of coatings with 24 ± 2 bounces. This result and the current development of laser patterning for industry assure the incipient use of laser ablation for release coatings. View Full-Text
Keywords: release coatings; water repellency; fluoropolymer; polytetrafluoroethylene; laser ablation release coatings; water repellency; fluoropolymer; polytetrafluoroethylene; laser ablation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Paz-Gómez, G.; del Caño-Ochoa, J.C.; Rodríguez-Alabanda, O.; Romero, P.E.; Cabrerizo-Vílchez, M.; Guerrero-Vaca, G.; Rodríguez-Valverde, M.A. Water-Repellent Fluoropolymer-Based Coatings. Coatings 2019, 9, 293.

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