Accession Number:

AD0743542

Title:

Submicron Separation and Data

Descriptive Note:

Final rept. 1 Nov 1971-31 May 1972 on Task 2 (1), Subtask B

Corporate Author:

IIT RESEARCH INST CHICAGO IL

Personal Author(s):

Report Date:

1972-05-01

Pagination or Media Count:

102.0

Abstract:

The present theory for predicting the dependence of the zeta potential and surface charge of colloidal particles on the concentration of electrolytes, surfactant, and pH is reviewed and shown to be inadequate for explaining experimental observations. A new theory is developed which explains these observations and is in good quantitative agreement with experimental data in the literature. This theory considers the various ways in which a surface charge can develop on a particle. These include adsorption of complex ions derived from electrolytes and from the particle itself and dissociation of surface groups due to chemical reactions at the particle surface. The result is an analytical expression for planar surfaces and a computer program for spherical surfaces.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE