The Effect of Humidity on the Compaction Behavior and the Adhesion Force for Surface-modified Quartz Powders

概要

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The compaction behavior and adhesive properties of original and surface-modified quartz powders were examined under various conditions of relative humidity. Adhesive force at a contact point (H) decreased with the progress of surface modification in the whole region of the relative humidity. H falls at small water contents and shows a minimum when the amount of adsorbed water is close to that required to monolayer complection (V_m). The patterns of the porosity of powder bed (s) in a centrifugal field as a function of adsorbed water showed a striking resemblance to those for the adhesion force at a contact point. Finally, the relationship among H, s and the average force acting on a particle (F) was examined. A fairly good correlation was observed between log (s-0.26) and log (H/F), regardless of the degree of surface modification.
公益社団法人日本薬学会の論文
1978-09-25