How do Electroosmotic pumps work?
Electroosmotic flow results from the interaction between an electric field and the diffuse layer of ions at a charged surface. In capillaries or pores, the migration of the diffuse layer toward the oppositely charged electrode causes the bulk fluid within the channel to flow through viscous drag.
Why is electro osmotic pumping useful?
Compared with other micropumps, electroosmotic pumps (EOPs) offer a number of advantages such as creation of constant pulse-free flows and elimination of moving parts. The flow rates and pumping pressures of EOPs matches well with micro analysis systems.
What is meant by electro-osmosis?
Electroosmosis is the flow of liquid that is in contact with a charged solid surface when an electric field is applied, and it becomes an important consideration with the increased surface area-to-volume ratio associated with small diameter capillaries. From: Chemical Analysis of Food: Techniques and Applications, 2012.
What is meant by electro osmosis?
What is meant by electrophoresis and electroosmosis?
In electrophoresis, solid particles (macromolecules like nucleic acids or proteins) are moved using an electric field. But in electro-osmosis a liquid is moving. • In electrophoresis, the support solid material is a gel. But it electro-osmosis it can be a gel, membrane, capillary, etc.
How can electroosmotic flow be reduced?
Electroosmotic flow can be reduced by coating the capillary with a material that suppresses ionization of the silanol groups, such as polyacrylamide or methylcellulose.
What is peristaltic water pump?
A peristaltic pump transfers chemicals sealed inside of a tube to prevent cross-contamination. This pump is the best choice for medical, agricultural, and water treatment purposes that require precise dosages of liquid.
What is electro osmotic dewatering?
The electroosmotic dewatering allows accelerating the consolidation and increasing the dewatering of semi-solid materials and relies on the electroosmosis (moving of ionized mobile liquid close to the particles surface due to the external electric field).
What is the difference between electrophoretic mobility and electroosmotic flow?
Mobility is proportional to the q/r ratio (q = charge and r = solute size). Solvated cations drag water molecules during the migration, hence there is net solution movement from anode toward cathode. Electroosmotic flow results because of the electric double layer than forms near the capillary wall.