Etude de l'adsorption de monocouche a l'interface solide-solution diluee par spectroscopie de photoelectrons (XPS): Application a l'adsorption de phospholipides sur des fibres damiante

The adsorption of phospholipids on asbestos chrysotile in a solid-dilute-solution system has been studied by X-ray photoelectron spectroscopy (XPS). Two batches with different particle sizes were used: with thin and long fibres (SFA), and with short fibres (FCC). The fibres were analysed on a portion of filter after filtration. This method of sample preparation results in good reproducibility of the absolute intensities of the XPS peaks. Under these conditions, the surface coverage for monolayer adsorption was determined using an overlayer model. Comparison of the results deduced from the XPS data with those obtained from chemical analysis shows that for low initial concentrations of phospholipids, a different mode of adsorption occurs on the FCC fibres.