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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Paruta-Tuarez, Emilio Baravian, Christophe Castel, Christophe Fersadou, Hala Marchal, Philippe Choplin, Lionel Sadtler, Véronique |
| Description | Country affiliation: France Author Affiliation: Paruta-Tuarez E ( Centre de Génie Chimique des Milieux Rhéologiquement Complexes (GEMICO), ENSIC, Nancy-Université, 1 rue Grandville BP 20451, 54001 Nancy, France.) |
| Abstract | The analysis of incoherent polarized steady light transport is reported as a convenient technique for the drop size determination in highly concentrated oil-in-water emulsions. The studied system consists in heptane-in-water emulsions stabilized with a copolymeric surfactant (Synperonic PE®/L64). Hundred grams of parent emulsions, at two volume fractions of dispersed phase (φ=0.958 and 0.937) were prepared using a semi-batch process. Then, they were diluted with the aqueous phase to obtain volume fractions ranging from 0.886 to 0.958. The use of a copolymeric surfactant allows the dilution of the highly concentrated emulsions without any change in the particle size distribution as confirmed by laser diffraction measurements. We found that the polarization technique allows the determination of the film thickness between water drops rather than their sizes. Consequently, we propose a geometrical relationship to determine an average drop size from the film thickness. The sensitivity of this alternative technique to detect changes in average drop size was studied by changing some process and formulation parameters. Drop size determination in highly concentrated emulsions via this method is useful since the measurement protocol neither involves dilution nor induces structural changes in the emulsion. |
| ISSN | 00219797 |
| Issue Number | 1 |
| Volume Number | 346 |
| e-ISSN | 10957103 |
| Journal | Journal of Colloid and Interface Science |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-06-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Light Surface-active Agents Chemistry Emulsions Chemical Synthesis Particle Size Surface Properties Journal Article Research Support, Non-u.s. Gov't Discipline Colloid & Interface Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Colloid and Surface Chemistry Biomaterials Electronic, Optical and Magnetic Materials |
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