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Identifying Colloid-Stabilizing Forces in Aqueous and Non-Aqueous Media Using Atomic Force Microscopy and Extended DLVO Theory

Michael Bower

出版	State University of New York at Buffalo, 2009
URL	http://books.google.com.hk/books?id=TztuAQAACAAJ&hl=&source=gbs_api

註釋

The interfacial forces that dictate colloid stability in aqueous and non-aqueous systems are a function of the polar and apolar properties of the medium. This study quantifies these colloidal forces and energies between a glass microsphere and a glass surface in water and n-decane solutions using Atomic Force Microscopy (AFM). These solutions were amended systematically to identify the magnitudes of various contributing forces in aqueous and non-aqueous systems. For comparison, classical DLVO and Extended-DLVO (XDLVO) theory were used to calculate the free energy of interaction for each system. Long-range repulsive forces were measured in aqueous solutions and were generally predicted by DLVO theory. Small repulsive forces were measured in non-aqueous solutions at close separation distances (