Method for eliminating gas blocking in electrokinetic pumping systems
Abstract
A method for eliminating gas bubble blockage of current flow during operation of an electrokinetic pump. By making use of the ability to modify the surface charge on the porous dielectric medium used in electrokinetic pumps, it becomes possible to place electrodes away from the pressurized region of the electrokinetic pump. While gas is still generated at the electrodes they are situated such that the generated gas can escape into a larger buffer reservoir and not into the high pressure region of the pump where the gas bubbles can interrupt current flow. Various combinations of porous dielectric materials and ionic conductors can be used to create pumps that have desirable electrical, material handling, and flow attributes.
- Inventors:
-
- Livermore, CA
- Oakland, CA
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 873981
- Patent Number(s):
- 6287440
- Application Number:
- 09/336,535
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F04 - POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS F04B - POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
- DOE Contract Number:
- AC04- 94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; eliminating; gas; blocking; electrokinetic; pumping; systems; bubble; blockage; current; flow; operation; pump; ability; modify; surface; charge; porous; dielectric; medium; pumps; electrodes; pressurized; region; generated; situated; escape; larger; buffer; reservoir; pressure; bubbles; interrupt; various; combinations; materials; ionic; conductors; create; desirable; electrical; material; handling; attributes; surface charge; gas bubbles; electrokinetic pump; material handling; pressure region; dielectric materials; current flow; dielectric material; gas bubble; various combinations; electrokinetic pumping; pumping systems; ionic conductors; eliminating gas; /204/
Citation Formats
Arnold, Don W, Paul, Phillip H, and Schoeniger, Joseph S. Method for eliminating gas blocking in electrokinetic pumping systems. United States: N. p., 2001.
Web.
Arnold, Don W, Paul, Phillip H, & Schoeniger, Joseph S. Method for eliminating gas blocking in electrokinetic pumping systems. United States.
Arnold, Don W, Paul, Phillip H, and Schoeniger, Joseph S. Tue .
"Method for eliminating gas blocking in electrokinetic pumping systems". United States. https://www.osti.gov/servlets/purl/873981.
@article{osti_873981,
title = {Method for eliminating gas blocking in electrokinetic pumping systems},
author = {Arnold, Don W and Paul, Phillip H and Schoeniger, Joseph S},
abstractNote = {A method for eliminating gas bubble blockage of current flow during operation of an electrokinetic pump. By making use of the ability to modify the surface charge on the porous dielectric medium used in electrokinetic pumps, it becomes possible to place electrodes away from the pressurized region of the electrokinetic pump. While gas is still generated at the electrodes they are situated such that the generated gas can escape into a larger buffer reservoir and not into the high pressure region of the pump where the gas bubbles can interrupt current flow. Various combinations of porous dielectric materials and ionic conductors can be used to create pumps that have desirable electrical, material handling, and flow attributes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {9}
}
Works referenced in this record:
MICROFLUIDICS:Microfluidic Diffusion-Based Separation and Detection
journal, January 1999
- Weigl, B. H.
- Science, Vol. 283, Issue 5400