Abstract
Silica particles were modified with a poly(4-vinylpyridine) (P4VP) for efficient separation of oil-in-water emulsions. Using a 3-(aminopropyl) triethoxysilane (APTES)-based molecule coupled to an appropriate radical initiator, P4VP chains were built from silica surfaces under mild reaction conditions using surface-initiated supplemental activator and reducing agent atom transfer radical polymerization. P4VP-modified silica particles were successfully used as a pH-switchable barrier for oil/water separation and proved to be efficient in removing oil from an oil-in-water nanoemulsion.
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Acknowledgements
Many thanks to Mrs. Sandra Mazerat from the “Institut de Chimie Moléculaire et des Matériaux d’Orsay” (ICMMO) for AFM measurements and Mr. Marceau Hénot from the “Laboratoire de Physique des Solides” (Orsay, France) for ellipsometry analysis. The authors would like to acknowledge the “Lebanese National Council for Scientific Research (CNRS-L)” for granting a doctoral fellowship to Mr. Maaz and the Hubert-Curien partnerships for granting a CEDRE Project for 2017–2018. Dr. Elzein acknowledges “L’OREAL-UNESCO foundation” for granting her the “L’OREAL-UNESCO for Women in Science, Levant and Egypt” regional fellowship 2016.
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Maaz, M., Elzein, T., Dragoe, D. et al. Poly(4-vinylpyridine)-modified silica for efficient oil/water separation. J Mater Sci 54, 1184–1196 (2019). https://doi.org/10.1007/s10853-018-2888-x
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DOI: https://doi.org/10.1007/s10853-018-2888-x