Effects of Soiling Condition of α-Fe₂O₃ Particles Deposition on Fabrics

Abstract

In order to investigate the preventive mechanism of α-Fe₂O₃ particles deposition on fabrics, the concentration of α-Fe₂O₃ particles and shaking rate of soiling bath have been discussed under the standard soiling conditions.
(1) As the concentration of α-Fe₂O₃ particles in soiling bath increased, the degree of α-Fe₂O₃ particles deposition increased for both cotton and polyester fabrics and attained equilibrium at the concentration of 0.05wt%. Although the degree of deposition on polyester fabric was higher than that of cotton fabrics at a lower concentration, the degree was reversed at a higher concentration.
(2) The behavior of α-Fe₂O₃ particles deposition on fabrics was similar to Langmuir type. Cotton fabric showed Stype Langmuir and polyester fabric showed L-type (typical Langmuir) in the lower concentration. Saturated equilibrium adhesion of α-Fe₂O₃ particles was 13.4mg/g on cotton fabric and 11.5mg/g on polyester fabric.
(3) As the shaking rate of soiling bath was changed, three stages have been observed in the proceeding of soiling. At first, slow region (the degree of soiling was small) appeared. At the second step, fast region (the soiling was accelerated in proportion to the shaking rate) exists. And finally, saturated region appears.
(4) It is considered that dispersion and coagulation of α-Fe₂O₃ particles occurred by the increase of shaking rate in addition to the growth of contacting chance between α-Fe₂O₃ particles and Fabric.