Abstract
AbstractThe stability of red iron oxide, titanium dioxide, and carbon black dispersed in cyclohexanone and isopropyl alcohol solutions of fatty polyamides was studied by measuring adsorption, viscosity, zeta potential, and sedimentation volumes. It was found that the stability of dispersion is markedly affected by the adsorption of polyamides. The greater the amount of adsorption, the greater the stability. On the other hand, a negative adsorption impaired the stability. A stabilization mechanism of polyamide adsorption was discussed in terms of entropic repulsion, electrostatic repulsion, and van der Waal's attraction.
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