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Advisor(s)
Abstract(s)
The stabilisation of water-in-oil (W/O) Pickering emulsions is still a challenge for the scientific community. In
this work, sodium oleate (SO) surface modified nano-hydroxyapatite (n-HAp) particles were produced and tested
as W/O stabilisers. The modified n-HAp particles presented a wettability dependent on the used SO content,
switching from hydrophilic (initial state) to hydrophobic (one SO layer) and back to hydrophilic (two SO layers).
The Pickering emulsions produced with the particles holding one SO layer (contact angle ~90 ◦) showed their
tight adsorption at the water-oil interface (confocal analysis), and maintained the stability up to 15 days. Overall
this work provides new developments in the field of W/O Pickering emulsions, a topic less studied than O/W,
opening new avenues for several applications.
Description
Keywords
Hydroxyapatite Sodium oleate Surface modification W/O Pickering emulsions Stability
Pedagogical Context
Citation
Ribeiro, Andreia; Manrique, Yaidelin A.; Lopes, José Carlos B.; Dias, Madalena M.; Barreiro, M.F. (2022). Development of water-in-oil pickering emulsions from sodium oleate surface-modified nano-hydroxyapatite. Surfaces and Interfaces. ISSN 2468-0230. 29, p. 1-9