Effect of Particle Interactions on the Assembly of Drying Colloidal Mixtures.

ABSTRACT: The effects of particle interactions on the size segregation and assembly of colloidal mixtures during drying were investigated. A cationic surfactant was added to a binary latex/silica colloidal dispersion that has been shown to self-stratify upon drying at room temperature. Atomic force microscopy was used to show that the change in particle interactions due to the presence of surfactants reduced the degree of stratification and, in some cases, suppressed the effect altogether. Colloidal dispersions containing higher surfactant concentrations can undergo a complete morphology change, resulting instead in the formation of armored particles consisting of latex particles coated with smaller silica nanoparticles. To further prove that armored particles are produced and that stratification is

SUBMITTER: Tinkler JD 

PROVIDER: S-EPMC9097527 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature