Premium
Stimulus‐Responsive Emulsifiers Based on Nanocomposite Microgel Particles
Author(s) -
Fujii S.,
Read E. S.,
Binks B. P.,
Armes S. P.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200401641
Subject(s) - nanocomposite , materials science , chemical engineering , protonation , desorption , pickering emulsion , nanoparticle , polymer chemistry , nanotechnology , organic chemistry , adsorption , chemistry , ion , engineering
Lightly crosslinked poly(4‐vinylpyridine)–silica nanocomposite microgel particles are used to prepare either oil‐in‐water or water‐in‐oil “Pickering” emulsions at around pH 8–9. Rapid demulsification occurs below pH 3, since the addition of acid leads to the protonation of 4‐vinylpyridine residues which, in turn, impart hydrophilic character to the nanocomposite particles, hence promoting their desorption from the droplet interface (see Figure).