Electrokinetic Effect of Builder on Washing Process

Abstract

The relation between the electrokinetic effects of a builder and detergency is discussed in terms of the ζ-potential and potential energy of interaction. Detergency and redeposition with various builders were measured. The ζ-potentials of carbon black, clay and cellulose in each solution containing various builders were measured. Potential energies due to interactions between the soil and fabrics were calculated according to the heterocoagulation theory. The results indicated that : 1) a builder increases the ζ-potential of soils; 2) the minimum potential energy is more closely related to detergency than any other potential energy.