The Interaction of Hair Fibers with Alkali Bromide Solutions

Abstract

The interaction of hair with alkali bromide solutions has been studied by measuring the amount of salt taken up from a given solution, using a radioactive-tracer technique, and the amount of water taken up from the solution, using a gravimetric technique.

It has been found that: (1) alkali bromides are taken up in a manner primarily dependent on the activity of the salt in the solution; (2) the amount of water absorbed is increased over the normal regain by the presence of the salt in the hair; (3) the ratio of salt to water is greater in the hair than in the external solution; (4) the rate of absorption of the salt is slower than the rate of diffusion of the same salt in water; (5) both rates and equilibrium are temperature- sensitive.

The interpretation of these results in terms of various simple models of the absorption process is discussed.

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