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Shear thinning in ternary bicontinuous and water‐in‐oil microemulsions
Author(s) -
Anklam Mark R.,
Prud'Homme Robert K.,
Warr Gregory G.
Publication year - 1995
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.690410324
Subject(s) - ternary operation , shear thinning , microemulsion , shear (geology) , shear rate , materials science , dodecane , thinning , thermodynamics , chemistry , rheology , composite material , organic chemistry , pulmonary surfactant , physics , computer science , programming language , ecology , biology
Shear thinning of ternary microemulsions of didodecyldimethylammonium bromide (DDAB), water, and dodecane in the range 10 3 to 10 6 s −1 is documented over a wide range of compositions. A marked transition in the characteristic shear rate is observed accompanying the structural transition from bicontinuous to water‐in‐oil (w/o) droplets as previously reported from diffusion and small‐angle scattering techniques. Results in the w/o region are consistent with those for a dispersion of hard spheres. The shear thinning of the bicontinuous structure, however, occurs at much higher shear rates, implying a shorter time and length scale for disruption of the equilibrium liquid structure by the flow field.