Colloidal droplets of the concentrated phase in aqueous methanol solutions of a hydrophilically modified poly(dimethylsiloxane)

摘要

Colloidal dispersions were prepared by adding water to methanol (MeOH) solutions of a hydrophilically modified poly(dimethylsiloxane) (HPM-PDMS) up to weight fractions of water equal to or greater than 0.6, at which the ternary solution is in the biphasic region. Static light-scattering measurements of the colloidal dispersions demonstrated that the internal concentration of the colloidal droplets was remarkably higher than that of solutions of HPM-PDMS directly dissolved in MeOH-water mixtures of the same water contents, which were studied previously. This difference in the internal structure of the colloidal droplets affects the van der Waals attraction and also the stability of the colloidal particles.