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ELAISSCH26 - SurfaTech
Elaissari_4304-0_Ch26_R1_04-16-03 08:44:09261 Preparation and Applications of2 Silicone Emulsions Using Biopolymers3 MUXIN LIU, AMRO RAGHEB, PAUL ZELISKO, and4 MICHAEL A. BROOKMcMaster University, Hamilton, Ontario, Canada5I. INTRODUCTION6A. Fundamentals7 Dispersions of water in oil, or the inverse, are inherently unstable. Emulsifica-8tion is thus a nonequilibrium process such that the average droplet size in an9emulsion tends to increase over time. However, the characteristic time scales10for coarsening of emulsions can span a remarkably wide range, from seconds to11several years, that depends on the nature of the oil, the surfactants used to12stabilize the emulsion , and the processing history. It is fair to say that not all13the parameters affecting emulsion stability are completely understood.
39 Elaissari_4304-0_Ch26_R1_04-16-03 08:44:09 Silicone Emulsions 751 1 C. Silicone Emulsion Formulations 2 Silicones can be formulated into emulsions of a variety of types including w/o, 3 o/w, o/w/o, w/o/w, and microemulsions with the appropriate surfactant(s). The 4 specific morphology of the emulsion depends on the surfactants used and pro- …
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