Abstract
The deposition of ferric oxide particles onto polyester and cotton fabrics in water-soluble polymer solutions was studied in relation to the particle size distribution. Zeta potentials of ferric oxide and the fabrics in the polymer solution were measured. The solutions of sodium carboxymethyl cellulose (NaCMC), polyethylene oxide (PEO) and polyvinyl alcohol (PVA) were examined up to the concentration of about 0.1g/100ml.The deposition of particles onto fabrics was prevented in NaCMC and promorted in PEO and PVA solutions. By increasing the polymer concentration, the median particle diameter of ferric oxide in both NaCMC and PEO solutions decreased in a similar manner, while in PVA solution it suddenly increased in a dilute concentration region. The particle size distribution was narrower in PEO than in NaCMC solution. Thus, it was found that there is no close relation between the deposition of the particles and their dispersing state in polymer solution.In NaCMC solution the negative zeta potential of both particles and fabrics increased with an increase in polymer concentration. However, in the solutions of PEO and PVA, the potentials had a tendency to decrease with increasing concentration.From these results, the mechanism of action of water-soluble polymers on soil deposition onto fabrics is discussed.
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