The Removal of Oils from Textile Materials

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Abstract
The influence of the textile substrate on the detergency process is investigated by straightforward oil removal evaluation in conjunction with contact angle measurements Difficulty of oil removal is associated with matching of the polarities of oil and fiber which, since oils are at least moderately nonpolar, means that, in general, the more hydrophobic the fiber, the more difficult is oil removal. A general correlation found between detergency and contact angle measurements for liquid paraffin and olive oil implies the adequacy of the "rolling up" mechanism as a description of the detergency process for these oils on assemblies of loose fibers. Discrepancies in the case of two fibers are attributed to the effect of a "capillary displacement" mechanism.