Abstract
In order to study the deposition of polystyrene (PS) and poly (methyl methacrylate) (PMMA) latices on Nylon 6 fabric in aqueous solutions of sodium dodecyl sulfate (SDS), the rate of deposition of latex particle on fabric and the interaction energy between fabric and latex particles were determined and the state of deposition of latex particles on fabric surface was observed by scanning electron microscope.
At pH 3, in aqueous SDS solution (1×10-3M) below the critical micelle concentration (cmc), both the rate constant of deposition and the state of deposition observed were scarcely changed in comparison with those in the absence of SDS in spite of large maximum value of total interaction energy-VTmax. In aqueous SDS solution (1×10-2M) above the cmc, further increase in VTmax and the decrease in rate constant were recognized and the latex particle deposited on fabric surface observed by scanning electron microscope decreased considerably. At pH 5.7 for PS latex, as well as at pH 3, in aqueous SDS solution (1×10-2M) above the cmc, both the rate constant of deposition and the latex particle deposited decreased remarkably. This results may indicate the effect of prevention to the deposition of latex on fabric by steric protective action of the ion or the micelle of SDS in SDS concentration above the cmc.
Also regardless of the presence of SDS, PS latex was easier to deposit on the fabric than PMMA latex.
