Adsorption and desorption of triton X-100 in polystyrene particles with different functionality - II. Desorption study

An experimental desorption study of Triton X-100 from latices with differen t functionality is presented. Two different strategies to follow the desorp tion experiment have been used: first, a discontinuous method based on the wash step (centrifugation-removal-redispersion); and second, a continuous m ethod based on the replacement of the disperse media. The desorption result s show that in all cases a residual amount of Triton X-100 remains adsorbed , indicating irreversibility of the surfactant adsorption. Finally, the eff ect of desorption on the colloidal stability of one type of latex-surfactan t complex has been analyzed. (C) 2000 Academic Press.