Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 429, Issue -, Pages 82-90Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2013.03.039
Keywords
W/O emulsions; Polyoxyethylene 4 lauryl ether; Phase inversion temperature; Inorganic electrolyte; Sedimentation; Coalescence
Categories
Funding
- Key Project of Chinese National Programs for Fundamental Research and Development (973 Program) [2009CB930100]
Ask authors/readers for more resources
The phase inversion temperature (PIT) is an inherent property of many water/nonionic surfactant/oil systems. It tends to form O/W emulsions when the PIT is high and vice versa. In the present paper, formation of W/O emulsions was studied in aqueous/polyoxyethylene 4 lauryl ether/paraffinic oil systems by simply homogenizing. Polyoxyethylene 4 lauryl ether is a common hydrophilic surfactant and is normally used to produce O/W emulsions. Inorganic electrolyte species and their concentrations were appropriately chosen to reduce the PIT for the formation of W/O emulsions. Furthermore, the effects of surfactant concentration and oil/water phase volume ratio on the PIT were investigated by measuring the conductivity variation. Stability of W/O emulsions was studied as a function of inorganic electrolyte concentration and storage time by bottle test, microscope observation, and viscosity measurement, which shows that the sedimentation and coalescence lead to the destabilization of W/O emulsions. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available