Surfactant Solution Transport in Wool Yarn

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Abstract
The transport of nonylphenol poly(ethylene oxide) surfactant solutions in bundles of wool carpet yams was studied and the kinetics were found to conform to Fick's law. Yam contaminants (residual wool grease and water soluble spinning lubricant) had a major effect on the diffusivity coefficients. The detergency of residual wool grease was involved in the solution transport and was probably the rate-determining step. Scoured and unscoured yams behaved differently: scoured yarn was wetted most rapidly by a surfactant with an EO/NP ratio of 9, while unscoured yam wetted most rapidly when the EO/NP was 12. The rate of solution transport in scoured yam in creased greatly with surfactant concentration but little with temperature, while the converse held for unscoured yarn.