1. Physicochemical and magnetic properties of functionalized lanthanide oxides with enhanced hydrophobicity
- Author
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Patrick Loulergue, Samer Al-Gharabli, Katarzyna Knozowska, Renars Lagzdins, Joanna Kujawa, Arkadiusz Dziedzic, Wojciech Kujawski, Ewa Talik, Anthony Szymczyk, Grzegorz Wrzeszcz, Nicolaus Copernicus University [Toruń], German Jordanian University (GJU), University of Silesia in Katowice, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Narodowym Centrum Nauki, NCN: PPN/BIL/2018/1/00222Campus France: 42903VH, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Lanthanide ,Physicichemistry ,Solid-state chemistry ,Materials science ,Physicochemistry ,Superhydrophobicity ,General Physics and Astronomy ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Contact angle ,Zeta potential ,[CHIM]Chemical Sciences ,Functionalization ,Surfaces and Interfaces ,General Chemistry ,Adhesion ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Surface energy ,0104 chemical sciences ,Surfaces, Coatings and Films ,Chemical engineering ,Surface modification ,Petal and lotus effect ,Adhesive ,Lanthanide oxide ,0210 nano-technology - Abstract
International audience; According to the developed bioinspired method in the one-step procedure, the material with the petal effect was switched to lotus one. Therefore, highly hydrophobic and super-hydrophobic materials with tunable adhesive properties and fractal-like structures were successfully produced with high efficiency (67–84%). The work's essence was to modify chemically selected powders of lanthanide oxides (CeO2, Pr6O11, Nd2O3, and Gd2O3). High effectiveness of the functionalization process with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (FC6) and n-octyltriethoxysilane (C6) was proven by various techniques, e.g. XPS, HR-TEM, ATR, XRD, zeta potential. Materials with water contact angle between 143.6° (CeO2-C6) and 175.5° (Nd2O3-FC6) with thermally stable nanolayer (up to 380 °C) were generated. Surfaces functionalized with FC6 possessed a polar component of surface free energy (SFE) close to zero. Water behavior in contact with the modified materials was studied, taking into consideration the unique electron structure of lanthanides assessed by goniometric measurement, also adhesion and spreading pressure were determined. Very low adhesion and polar SFE partly resulted in immediate bouncing of water droplet upon contact with the modified surface. The presented method allows preparing stable materials with a high potential in materials chemistry and modulation of surface features and engineering (e.g. heat transfer fluids, specific coating). © 2020 The Authors
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- 2021
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