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    Laponite-Based Surfaces with Holistic Self-Cleaning Functionality by Combining Antistatics and Omniphobicity

    Year: 2017

    Journal: ACS Appl. Mater. Interfaces, Volume 9, NOV 8, page 39078–39085

    Authors: Fenero, Marta; Palenzuela, Jesus; Azpitarte, Itxasne; Knez, Mato; Rodriguez, Javier; Tena-Zaera, Ramon

    Organizations: Basque Government under the ELKARTEK program [KK-2015/00101]; Spanish Ministry of Economy and Competitivity (MINECO) [MAT2016-77393-R]; FEDER funds, EU; Doctoral Programme of the Department of Education, Linguistic Policy and Culture of the Basque Government

    Keywords: Self-cleaning; omniphobicity; antistatics; dust-repellency; laponite

    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 10(7) Omega/square and contact angles of 106 degrees(H2O) and 93 degrees (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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