Polymer-coated surfaces to control surface zeta potential

Details Polymer-coated surfaces to control surface zeta potential Polymer-coated surfaces to control surface zeta potential

1985-12-16

1987-09-01

Demers, Arthur P.

Chemistry: electrical and wave energy

Apparatus

Coating, forming or etching by sputtering

204300EC, 428403, 428405, 428407, B01D 1302, C25D 1300

Patent

active

046907491

ABSTRACT:
A method for eliminating or controlling electroosmosis and other zeta potential related phenomena in electrophoresis comprising conducting electrophoresis employing electrophoretic surfaces coated with covalently bound hydrophilic, neutral polymers is described. An electrophoretic chamber for eliminating or controlling electroosmosis and other zeta potential related phenomena in electrophoresis comprising electrophoretic surfaces coated with covalently bound hydrophilic, neutral polymers, is also disclosed as well as particles exhibiting controlled electrophoretic mobility. The method and electrophoretic chamber not only eliminate electroosmosis, but allow for specific control of electroosmosis. The coated electrophoretic surface is stable relative to prior art coatings and over a broad range of pH. The point of optical focus for accurate mobility measurements is increased from a narrow stationary level to the entire chamber, facilitating accurate measurements by mechanical means. The method also reduces or eliminates assymetric fluid flows due to electroosmosis in electrophoresis chambers of square or rectangular cross-section.

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Ott, Cellulose and Cellulose Derivatives Interscience Publishers, N.Y.; NY; 1943, pp. 77-78.
Hjerten, Journal of Chromatography, 347 (1985) pp. 191-198.
Andrade et al., Hydrogels for Medical and Related Applications, A.C.S. Symposium #31 (1976) pp. 241-251.

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