Diffusion of small particles through pores of similar diameter

Bernard M. Uzelac, E. L. Cussler

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

The diffusion of monodisperse polystyrene latex of 910 Å diameter through Millipore filters containing pores from 2200 to 12000 Å has been measured at 25° and 45°C. The temperature dependence of the diffusion coefficient and the variation of diffusion coefficient with pore diameter are consistent with the model of a rigid sphere surrounded by a continuum and moving in a cylindrical pore. However, the diffusion coefficients are roughly ten times those predicted by the Stokes-Einstein equation-an effect apparently caused by the high surface charge resulting from adsorbed soap ions.

Original languageEnglish (US)
Pages (from-to)487-491
Number of pages5
JournalJournal of Colloid And Interface Science
Volume32
Issue number3
DOIs
StatePublished - Mar 1970
Externally publishedYes

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