Off-campus UMass Amherst users: To download dissertations, please use the following link to log into our proxy server with your UMass Amherst user name and password.
Non-UMass Amherst users, please click the view more button below to purchase a copy of this dissertation from Proquest.
(Some titles may also be available free of charge in our Open Access Dissertation Collection, so please check there first.)
Hydrodynamic and electrophoretic fingerprinting in the pH, p-lambda domain
Abstract
A new technique, hydrodynamic fingerprinting, is presented for the characterization and study of colloidal dispersions on the basis of their hydrodynamic behavior. In the hydrodynamic fingerprint the hydrodynamic size as measured by photon correlation spectroscopy is presented as a function of two colloidal state variables simultaneously. There is an acid-base variable, pH, and a conductivity variable, p$\lambda$. Hydrodynamic fingerprinting is applied to four polymer latexes, two polystyrene latexes, one with a sulfate surface and one with a carboxyl surface, and two methyl maehacrylate-ethyl acrylate latexes, one of which contains 2 % acrylic acid. It is shown that hydrodynamic fingerprinting can be used to study colloidal stability, expandable properties of colloids, time effects in colloidal solutions, and the surface chemistry of the colloid-solution interface. A combinatorial hydrodynamic-electrokinetic fingerprinting analysis of the acidic copolymer latex is also presented. This approach can be used to gain insight into ambiguous electrokinetic behavior, and to study the surface charge characteristics of colloidal dispersions.
Subject Area
Chemistry
Recommended Citation
Prescott, James Howard, "Hydrodynamic and electrophoretic fingerprinting in the pH, p-lambda domain" (1992). Doctoral Dissertations Available from Proquest. AAI9305884.
https://scholarworks.umass.edu/dissertations/AAI9305884