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Creep/Recovery Behavior of Oil‐Water Emulsions: Influence of Disperse Phase Concentration
Author(s) -
GLADWELL N.,
RAHALKAR R.R.,
RICHMOND P.
Publication year - 1985
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1985.tb10503.x
Subject(s) - rheology , creep , materials science , coagulation , phase (matter) , emulsion , viscous flow , composite material , mechanics , chemistry , organic chemistry , physics , psychology , psychiatry
The rheological (creep/compliance) behavior has been studied for a series of soya oil (soybean oil)‐water emulsions with the disperse phase (oil) concentration ranging from 20% to 70%. The compliance response was due to three mechanisms: instantaneous elastic, retarded elastic and viscous flow. It was necessary to postulate the presence of two retardation processes to account for the Theological behavior. As the oil concentration was increased, the emulsions became more elastic, with the instantaneous elastic mechanism becoming more dominant. In the non‐linear region, the viscous flow was more dominant, with the emulsions becoming less elastic with increasing shear stress. The results are rationalized in terms of the breaking and reforming of bonds in the network like coagulation structure.