Laponite-Based Surfaces with Holistic Self-Cleaning Functionality by Combining Antistatics and OmniphobicityClick to copy article linkArticle link copied!
- Marta Fenero
- ,
- Jesús Palenzuela
- ,
- Itxasne Azpitarte
- ,
- Mato Knez
- ,
- Javier Rodríguez
- , and
- Ramón Tena-Zaera
Abstract
In the present work, perfluoroalkylated laponite nanoparticles with a high degree of functionalization (60 wt %) have been prepared and a methodology to prepare transparent, antistatic, and omniphobic laponite-based films with holistic self-cleaning properties against liquids, solids and liquid–solid mixtures has been developed. The intrinsic electrical and ionic conductivities observed in unmodified laponite coatings are combined with perfluoroalkyl-modified laponite clays. As a result, films with improved self-cleaning functionality based on dust-repellency and omniphobic liquid-repellence (sheet resistance in the range of 107 Ω/□ and contact angles of 106° (H2O) and 93° (oil)) were obtained. These unique films, being capable to repel dust and liquids, were applied to a variety of substrates (i.e., glass and plastics) and tested against solids and liquids of different nature with excellent performance. Bending tests of these holistic self-cleaning films deposited over flexible substrates showed better mechanical performance than unmodified laponite films.
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