Journal
COLLOID AND POLYMER SCIENCE
Volume 289, Issue 14, Pages 1543-1551Publisher
SPRINGER
DOI: 10.1007/s00396-011-2477-x
Keywords
Pickering emulsion; Seeded emulsion; gamma-Ray; PS microspheres; Submicron-sized
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Funding
- National Natural Science Foundation of China [50873096, 21074122]
- Ministry of Science and Technology of China [2007CB936401]
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Submicron-sized polystyrene (PS) microspheres with a relatively narrow particle size distribution can be easily produced through emulsion polymerization induced by gamma-ray at room temperature using a new type of amphiphilic cross-linked poly(stearyl methacrylate-co-acrylamide-co-acrylic acid) particles as stabilizer. The properties of these amphiphilic particles were described, including morphology, size, zeta potential, and contact angles. The effect of the pH value and the content of amphiphilic particles on the formation and stability of emulsions were also investigated. Meanwhile, the obtained PS microspheres were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. In addition, through observing the morphology and size of emulsion droplets at different times under an optical microscope, we found it is interesting that Pickering emulsions formed initially disappeared gradually, which is different from the common Pickering emulsions stabilized by inorganic particles. Thus, the mechanism was further discussed.
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