Abstract
The paper presents the study of the rheological and superficial behavior (foaming power and wetting capacity) of some aqueous solutions with polyethoxylated fatty alcohols content. The influence of fatty alcohols concentration and their degree of ethoxylation as well as that of temperature on the rheological behavior was determined from the dependences between the shear stress t and the shear rate. The results demonstrate that all the studied solutions have non-Newtonian behavior, with flow behavior index smaller than 1.
Highlights
Polyethoxylated fatty alcohols are probably the most important group of nonionic surfactants due their rapid biodegradability and low toxicity of metabolites
The aim of this work was to analyse the rheological behavior of aqueous solutions with various concentrations of polyethoxylated fatty alcohols
From the graphical representation of apparent viscosity ηthae(cshalecaurlartaetde)aesvtohleutriaotnioabseatwfuenecntitohne shear stress and of shear rate for samples A3 and B3 it is observed that the ratio decreases slightly with the increase of shear rate
Summary
Polyethoxylated fatty alcohols are probably the most important group of nonionic surfactants due their rapid biodegradability and low toxicity of metabolites. They have hydroxyl or ether bond which will not ionize in water [1]. The aim of this work was to analyse the rheological behavior of aqueous solutions with various concentrations of polyethoxylated fatty alcohols. It was followed the influence of surfactant concentration and degree of ethoxylation, as well as that of temperature, on the rheological behavior.
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