Thermosensitive Pickering Emulsion Stabilized by Poly( N -isopropylacrylamide)-Carrying Particles
2008; American Chemical Society; Volume: 24; Issue: 7 Linguagem: Inglês
10.1021/la701780g
ISSN1520-5827
AutoresSakiko Tsuji, Haruma Kawaguchi,
Tópico(s)Surfactants and Colloidal Systems
ResumoPoly(N-isopropylacrylamide) (PNIPAM)-carrying particles were characterized as thermosensitive Pickering emulsifiers. Emulsions were prepared from various oils, such as heptane, hexadecane, trichloroethylene, and toluene, with PNIPAM-carrying particles. PNIPAM-carrying particles preferentially formed oil-in-water (O/W)-type emulsions with a variety of oils. All the emulsions stabilized by PNIPAM-carrying particles were stable for more than 3 months as long as they were stored at room temperature. However, when the emulsions were heated from room temperature to 40 degrees C, at which point the PNIPAM layer caused a coil-to-globule transition, phase separation occurred. Thus, by using thermosensitive PNIPAM-carrying particles as emulsifiers, the stability of the Pickering emulsions could be controlled by a slight change in temperature.
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