Accession Number : AD0667971

Title :   STABILITY OF LYOPHOBIC COLLOIDS IN AQUEOUS MEDIA.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV

Personal Author(s) : Quilty,Charles J.

Report Date : MAR 1968

Pagination or Media Count : 29

Abstract : Detachment and stabilization of solid contamination from weapon substrates presents a difficult problem in weapons cleaning. An understanding of the fundamental principles involved in the stabilization of solid contamination is, therefore, important for formulation of improved weapons cleaning materials. In this investigation, the stability of common weapon contamination was studied in aqueous surfactant solutions. Zeta potentials of aqueous dispersions of lyophobic colloids were determined by electrophoresis measurements and compared with sedimentation times of the dispersed systems. The stability of the dispersions was found to be governed by double-layer electrostatic repulsion at the surface of the colloidal particles. Calculations based on the Derjaguin-Landau-Verwey-Overbeek theory of stability were in excellent agreement with the experimental data. (Author)

Descriptors :   (*CLEANING COMPOUNDS, COLLOIDS), (*COLLOIDS, STABILITY), SUBSTRATES, WEAPONS, CONTAMINATION, ELECTROPHORESIS, ELECTRIC DOUBLE LAYER, SURFACE ACTIVE SUBSTANCES

Subject Categories : Physical Chemistry
      Solvents, Cleaners, and Abrasives

Distribution Statement : APPROVED FOR PUBLIC RELEASE