Applications of microemulsions with different compositions in detergents technique
Basing on the knowledge of their phase diagrams, model textile detergency tests with selected cleaning media of such compositions that form at the given washing temperatures homogeneous, bicontinuous microemulsions were performed. These cleaning media consisted of quaternary systems of the type water/Halpaclean/Marlipal/n-pentanol. As model test fabric a polyester-cotton blend (65:35) soiled with 6 mg pigments and 42 mg wool fat and sebum per gram fabric was used. The composition of the cleaning media was varied by changing the ethoxylation number of the Marlipals or the concentration of n-pentanol in the quaternary system.
The results of the detergency tests with microemulsions of different compositions showed that the detergency of these media especially at low temperatures T<313 K is notably higher than that of a standard detergent solution. The optimum detergency of microemulsion systems corresponds to a minimum of the interfacial tension γ between the microemulsion and the water or oil excess phase in the heterogeneous regions of the phase diagram.
Key wordsBicontinuous microemulsions textile detergency quaternary system water/Marlipal/Halpaclean/n-pentanol
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