Thermosensitive pickering emulsion stabilized by poly(N-isopropylacrylamide)-carrying particles |
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Authors: | Tsuji Sakiko Kawaguchi Haruma |
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Affiliation: | Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. |
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Abstract: | Poly(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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