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conferenceseries .com
November 13-15, 2017 | Las Vegas, USA
14th International Conference and Exhibition on
Materials Science and Engineering
RRJOMS | Volume 5 | Issue 7 | November, 2017
Innovative superhydrophobic nano coatings for durable applications
Daniela Rusu1, Gaëtan Garreffa1, Sophie Bistac1, Christelle Delaite1 and David Portet2
1Université de Haute-Alsace, France
2Surfactis Technologies, France
Statement of the Problem: Nowadays, superhydrophobic surfaces (Figure 1) are a hot topic of coatings research, due to their water-
repellent and self-cleaning potential, first observed on lotus leaves. Biomimetic artificial coatings intend bringing together the double/
multiple roughness of the natural self-cleaning surfaces and a hydrophobic coating that could mimic the wax properties covering the
lotus leaves. The roughness of the surface plays an important role in obtaining high contact angles (> 150°); otherwise, it is impossible
to exceed angles of 120°. This work proposes an innovative method to produce durable superhydrophobic coating films with self-
cleaning features.
Methodology &Theoretical Orientation: This method uses raspberry-like silica-modified nanoparticles (Figure 1) for texturing the
substrate surface and it is particularly suitable for thermosensitive and/or transparent surfaces, since the temperature of the coating
process remains below 100°C.
Findings: The method comprises several steps: (1) texturing the surface, via deposition of innovative silica-modified nanoparticles of
different sizes, (2) crosslinking the textured surface, via a crosslinking agent, and optionally, (3) surface modification by hydrophobic
molecules. The coating hydrophobicity can be enhanced by optimizing the preparation process. Preliminary coating tests on
transparent substrates confirm the efficiency of the applied strategy: water droplets in contact with such a textured surface are almost
spherical, indicating a Cassie-Baster state, where the liquid is in direct contact only with the upper points of the roughness and with
air pockets trapped between the liquid and the lower roughness points of the solid coating.
Conclusion & Significance: An innovative strategy for preparing textured superhydrophobic surfaces was presented. This method is
inexpensive and simple to apply and it is particularly suitable for industrial applications needing self-cleaning coating features applied
on thermosensitive and/or transparent surfaces/materials.
Biography
Daniela Rusu (M.Sci., Ph.D., HDR in Materials Science) is a Polymer Scientist at the Université de Haute-Alsace, Laboratoire de Photochimie et d'Ingénierie Macromolécu-
laires (LPIM), Mulhouse, France. Her research and teaching activities focuses on multiphase polymer systems (polymer blends, nanostructured materials, gels, compos-
ites…), in understanding the processing-structure-properties relationships and tailoring these complex polymer materials for targeted applications (biomedical applications,
food packaging, transport, coatings…). Her current research focuses on advanced polymeric materials for coating and biodegradable polymers for medical and industrial
applications. She co-authored 10 book chapters and over 100 articles on multiphase polymer systems in different peer-reviewed journals and proceedings. She is an active
reviewer for peer-reviewed journals and a scientific expert for EU Framework Program Horizon 2020 for Research and Innovation.
Daniela Rusu et al., Res. Rev. J Mat. Sci. 2017, 5:7
DOI: 10.4172/2321-6212-C1-012