Oil-in-water Pickering Emulsions Stabilized by Nanometer Zein Microspheres

doi:10.3724/SP.J.1095.2014.30426

Chinese Journal of Applied Chemistry

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Oil-in-water Pickering Emulsions Stabilized by Nanometer Zein Microspheres

MA Yalu^*, JIN Xiaoning, LIU Na, LIN Guangyu, FENG Tianshi

(Department of Chemistry,Institute of Science,Tianjin University,Tianjin 300072,China)

Received:2013-08-26 Revised:2013-10-09 Published:2014-06-10 Online:2014-06-10
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Abstract

Abstract: Zein microspheres with the most probable diameter of 40 nm were prepared by phase separation process. Zein colloidal dispersion was concentrated under reduced pressure by rotary evaporation. Zein colloid with obvious Tyndall effect is stable even after preparation for a few months. The zeta-potentials of zein colloid were determined by electrophoretic mobility measurements. The results show that zein colloid has excellent dispersing property at pH around 4. Pickering emulsions of oil-in-water type were prepared by using zein microspheres as stabilizers. The effects of the amount of colloidal particles, oil/water volume ratio on emulsion stability were investigated. The results indicate that the addition of zein colloidal particles at 0.4% and the higher oil/water volume ratio in Pickering emulsion are propitious to increase the emulsion stability. The stability mechanism of zein microspheres as stabilizers in Pickering emulsion was also discussed on account of its amphiphilic macromolecules and interfacial assembly.

Key words: zein microspheres, phase separation process, Pickering emulsion, stability mechanism

CLC Number:

MA Yalu*, JIN Xiaoning, LIU Na, LIN Guangyu, FENG Tianshi. Oil-in-water Pickering Emulsions Stabilized by Nanometer Zein Microspheres[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30426.

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Oil-in-water Pickering Emulsions Stabilized by Nanometer Zein Microspheres

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