Authors: Ogonowski, Robert; Jańczuk, Bronisław; Wójcik, Wiesław

Source: Journal of Adhesion Science and Technology, Volume 22, Number 1, 2008 , pp. 111-120(10)

Publisher: VSP, an imprint of Brill

Abstract:

Measurements of the destruction time of the sediment column structure were carried out for different fractions of silica particles in NaCl and CaCl₂ solutions whose concentrations were varied from 0.25 M to 2.0 M. On the basis of this study, linear relationships between the reciprocal of the destruction time of the silica sediment column structure and average diameter of the silica fraction, the density and the work of cohesion of the solutions were found. From these relationships the critical values of the particle diameter, the cohesion work and density of the solutions were determined for the destruction time equal to infinity (1/t = 0). The detachment force of one particle from another, which resulted from gravitational interaction, was calculated using the above critical parameters. For the system whose components have critical values the detachment force is found to be equal to the attachment force resulting from the interfacial interaction. Next, on the basis of our earlier study and Derjaguin's approximation, the radius of the contact plane and the attachment force between two silica particles were calculated. The detachment force decreased with increasing salt concentration, but the attachment force was nearly constant. It was found that, for a given salt concentration, the relationship between the reciprocal of the destruction time and the difference between the detachment and attachment forces was also linear. It appeared that for the silica column structure having critical parameters the values of the difference between the detachment and attachment forces were negative. This means that in the calculation of the attachment force between silica particles in the studied solutions an additional interaction should be taken into account.

Keywords: SILICA PARTICLES; ELECTROLYTE SOLUTION; ATTACHMENT FORCE; DETACHMENT FORCE

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156856108X292313

Affiliations: 1: Department of Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland

Publication date: 2008-01-01

Related content

• In this: publication
• By this: publisher
• In this Subject: Chemistry (General) ,  Engineering/Technology ,  Materials & Manufacturing
• By this author: Ogonowski, Robert ;  Jańczuk, Bronisław ;  Wójcik, Wiesław

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers