Transcription of ELAISSCH26 - SurfaTech
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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.
36 Elaissari_4304-0_Ch26_R1_04-16-03 08:44:09 Silicone Emulsions 749 1 Silicone emulsions can also arise inadvertently, as a consequence of adventitious 2 surfactants, particularly in biological environments, as shall be discussed below. 3 D. Impact of Silicone Emulsions in Biological 4 Domains: Purpose of this Chapter 5 In this …
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