油性ヨゴレの洗浄性に関する研究

-ガスクロマトグラフィーによる脂肪酸の洗浄性の検討-

抄録

In a course of the study of oily soil removal, the authers developed a quantitative determination of mixed oily soils before and after washing of cotton and polyester fabrics by applying the GLC technique.
Two fatty acids, i.e., lauric (C₁₂) and stearic (C₁₈) acids have been chosen as model soils.
So far as these fatty acids are concerned, soil with the shorter chain length is removed more easily in SDS solution.
When cotton fabrics soiled with each fatty acid alone and two components' mixture, removal of each component in mixtures is more difficult than each component alone, and the level of the residual part is largely dependent on the mixing ratio of the components.
Maximum residual C₁₈ fatty acid was observed at about 1 : 1 (g/g) ratio with regard to C₁₂ component.
Fatty soils seem to adhere partly on fabrics mechanically, and the other part may be adsorbed more strongly by intermolecular forces, and the former could be removed predominantly by water and the latter by SDS solution.
In this respect, the authors attempted the analysis of the soil removal process by two kinds of first order reaction, which will be reported later.