Abstract
The mechanism of soiling of α-Fe2O3 on cotton and rayon fabrics was investigated by comparing the degree of soiling and coagulation properties of α-Fe2O3 in various dispersion media with different solubility parameter. For nonpolar solvents, the degree of soiling of α-Fe2O3 was remarkable. This was comfirmed by a high sedimentation volume and a faster sedimentation rate. Conversely, a poor soiling action of α-Fe2O3 was obtained for polar solvents except water. In a n-butanol-carbon tetrachloride dispersion medium, the deposition of α-Fe2O3 on fabrics increased by a small addition of n-butanol and conversely decreased as the concentration of n-butanol was increased. From these results, it was clarified that the solubility parameter of the dispersion medium is the controlling index behind the soiling mechanism of α-Fe2O3 on cellulose fabrics.
