EFFICACY OF HYDROXYAPATITE DISPERSANTS IN THE PRESENCE OF SURFACTANTS

摘要

The dispersion of hydroxyapatite, Ca_(5)(PO_(4))_(3)OH, HAP, in aqueous systems in the presence of variety of polymers of different composition and ionic charge has been investigated. The dispersion data show that polymer effectiveness as HAP dispersant strongly depends upon polymer architecture. It has been found that anionic, non-ionic, amphoteric, and cationic surfactants are ineffective as HAP dispersants. Additionally, it has also been observed that cationic surfactant and cationic polymer exhibit antagonistic effect on the performance of anionic polymeric dispersants.