Conference paper

Influence of Surface Active Agents on the Interaction in Disperse Systems

H. Sonntag ; Akademie der Wissenschaften der DDR, Berlin Zentralinstitut fur physikalische Chemie, Berlin, DDR

Abstract

The behaviour and the properties of a dispersion are determined
by the forces of interaction developing at the phase boU111dary
due to the asymmetry of the intermolecular forces. The forces of
longer ranges, the electrostatic repulsive forces, and the London
dispersion forces will determine whether the dispersed particles will
continue to exist as individuals or coagulate into particles aggregates
(flocculation process). The behaviour of the particle networks,
the question whether the individuals continue to exist in the aggregate
form, separated by thin films of the dispersion medium,
or flow or grow together to larger particles (coalescence), is influenced
by dipole tnteractions, steric forces, and eventually by
hydrogen bridge linkages, in addition to the electrostatic and
dispersion interaction forces. To modify the interparticle forces
surfactants or macromolecular compounds are used, which will both
influence the long~range inter-particle forces and to a high de1gree,
govern the interaction over short distances, expecially the »steric
hindrance«.

Keywords

Hrčak ID:

196437

URI

https://hrcak.srce.hr/196437

Publication date:

22.12.1976.

Visits: 654 *