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Poly(4-vinylpyridine)-modified silica for efficient oil/water separation
- Maaz, Mohamad, Elzein, Tamara, Dragoe, Diana, Bejjani, Alice, Jarroux, Nathalie, Poulard, Christophe, Aubry-Barroca, Nadine, Nsouli, Bilal, Roger, Philippe
- Journal of materials science 2019 v.54 no.2 pp. 1184-1196
- nanoemulsions, oils, polymerization, reducing agents, silica
- 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.