title: Stabilization of ceramics particles with anionic polymeric dispersants.
abstract: The dispersion of colloidal ceramic particles in an aqueous media using a charged polymer has been investigated extensively. Most often, such a dispersion is obtained by an electrosteric mechanism. The stabilizing forces that result from electrical double layer repulsion and/or steric interaction must be sufficiently large in magnitude to provide an energy barrier against aggregation. Several factors, such as pH, temperature and ionic strength, nature, structure and molecular weight of the polyelectrolyte and its degree of dissociation can affect the respective contribution of electrostatic and steric interactions. In this study we applied silver nanoparticles prepared by reduction method with modifications. The hydroxyapatite was obtained from pork bone sludge. Polymer system contained poly(acrylic acid) and poly(ethylene glycol). The effects of dispersant structure on particle stabilization were investigated through properties of the suspensions. Viscosity and sedimentation height measurements indicated that addition of the dispersants improve particle stabilization. A dispersants were characterized using Scanning electron microscopy (SEM) with BSE detector (Back Scaterred Electrons), X-ray diffraction (XRD) and pH determination.
authors: Department of Chemistry and Technology of Polymers, Cracow University of Technology Warszawska 24, 31-155 Kraków, Poland.
authors: B
authors: B
authors: Tyliszczak
authors: A
authors: A
authors: Sobczak-Kupiec
authors: K
authors: K
authors: Bialik-Was
authors: W
authors: W
authors: Kasprzyk