Dual adsorption on negatively charged surfaces in non-aqueous media

摘要

Titanium hydride powders with negatively charged surfaces cannot be dispersed by anionic polymers. Using low dielectric constant liquids further complicates dispersion by increasing surface charge while reducing the charge at the shear layer. It is possible to provide stabilization by employing two polymers that reverse and increase the magnitude of the surface charge. The same non-ionic polymer can then be used in the steric dispersion of both negatively and positively charged particles. This greatly improves process flexibility and allows the use of steric dispersants that under normal circumstances could not be used.