Abstract
The adsorption of sodium alkyl sulfates and sodium oleate on various textile fibers passes through a maximum, and sometimes subsequently a minimum, as the concentration of surface-active material in the aqueous phase is increased. The transverse swelling of single fibers, constant in dilute solutions of surface-active compound, decreases at the concentration corresponding to maximum adsorption. The shape of the adsorption/concentration graph can be explained on the basis of adsorption of single ions on a changing surface, and this hypothesis can also explain the dialysis of surface-active compounds. The effects of alkali and inorganic electrolyte on the adsorption isotherms are also discussed.
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