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Influence of chemical and electrostatic gradients on diffusion in microemulsions
Author(s) -
McGreevy Robert J.,
Schechter Robert S.
Publication year - 1991
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690370203
Subject(s) - microemulsion , diffusion , chemistry , pulmonary surfactant , ionic bonding , drop (telecommunication) , capillary action , benzene , thermodynamics , phenol , chemical physics , chemical engineering , analytical chemistry (journal) , chromatography , organic chemistry , ion , physics , telecommunications , biochemistry , computer science , engineering
Nonequilibrium diffusion behavior in nonionic and ionic surfactant microemulsion systems has been studied experimentally using the open‐ended capillary method. Experimental results for these systems have been compared with a drop theory of diffusion for microemulsions under conditions where large concentration and electrostatic gradients exist. The results show good agreement in concentration profiles between theory and experiment for the microemulsion components—water, benzene, and phenol. Furthermore, under certain conditions the theory predicts that over a limited time interval phenol will diffuse from low‐concentration regions to regions of higher concentration. This phenomenon has been observed.