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Electroosmotic pump
 
 
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An electroosmotic pump (EOP), or EO pump, is used for removing liquid flooding water
Water

Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam....
 from channels and gas diffusion
Diffusion

Molecular diffusion, often called simply diffusion, is a net transport of molecules from a region of higher concentration to one of lower concentration by random molecular motion....
 layers and direct hydration
Hydration

Hydration may refer to:* Hydration reaction, a chemical addition reaction* Mineral hydration, an inorganic chemical reaction where water is added to the crystal structure of a mineral...
 of the proton exchange membrane
Proton exchange membrane

A proton exchange membrane or polymer electrolyte membrane is a semipermeable membrane generally made from ionomers and designed to proton conductor while being impermeable to gases such as oxygen or hydrogen....
 in the membrane electrode assembly
Membrane electrode assembly

A membrane electrode assembly is an assembled stack of proton exchange membranes , catalyst and electrode used in a fuel cell. The PEM is sandwiched between two electrodes which have the catalyst embedded in them....
 (MEA) of the proton exchange membrane fuel cell
Proton exchange membrane fuel cell

Proton exchange membrane fuel cells, also known as polymer electrolyte membrane fuel cells , are a type of fuel cell being developed for transport applications as well as for stationary fuel cell applications and portable fuel cell applications....
s.

troosmotic pumps are fabricated from silica
Silicon dioxide

The chemical compound 'silicon dioxide', also known as 'silica' , is an oxide of silicon with a chemical formula of and has been known for its hardness since antiquity....
 nanospheres or hydrophilic porous glass, the pump
Pump

A pump is a device used to move fluids, such as gases, liquids or Slurry. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure....
ing mechanism is generated by an external electric field applied on an electric double layer
Electrical double layer

The electrical double layer is a structure that describes the variation of electric potential near a surface, and has a large bearing on the behaviour of colloids and other surfaces in contact with solutions and solid state fast ion conductors....
 (EDL), generates high pressures (more than 340 atm
Atmosphere (unit)

The standard atmosphere is an international reference pressure defined as 101,325 Pascal and formerly used as unit of pressure . For practical purposes it has been replaced by the Bar which is 100,000 Pa....
 (34 MPa) at 12 kV applied potentials) and high flow rates (e.g., 40 ml
Litre

The litre or liter is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case . The lower case L is often written as a cursive l to avoid confusion with the number 1 in antiqua fonts....
/min at 100 V
Volt

The volt is the SI SI derived unit of electric potential difference or electromotive force, commonly known as voltage. It is named in honor of the Lombard physicist Alessandro Volta , who invented the voltaic pile, possibly the first chemical battery ....
 in a pumping structure less than 1 cm³ in volume).






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Encyclopedia


An electroosmotic pump (EOP), or EO pump, is used for removing liquid flooding water
Water

Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam....
 from channels and gas diffusion
Diffusion

Molecular diffusion, often called simply diffusion, is a net transport of molecules from a region of higher concentration to one of lower concentration by random molecular motion....
 layers and direct hydration
Hydration

Hydration may refer to:* Hydration reaction, a chemical addition reaction* Mineral hydration, an inorganic chemical reaction where water is added to the crystal structure of a mineral...
 of the proton exchange membrane
Proton exchange membrane

A proton exchange membrane or polymer electrolyte membrane is a semipermeable membrane generally made from ionomers and designed to proton conductor while being impermeable to gases such as oxygen or hydrogen....
 in the membrane electrode assembly
Membrane electrode assembly

A membrane electrode assembly is an assembled stack of proton exchange membranes , catalyst and electrode used in a fuel cell. The PEM is sandwiched between two electrodes which have the catalyst embedded in them....
 (MEA) of the proton exchange membrane fuel cell
Proton exchange membrane fuel cell

Proton exchange membrane fuel cells, also known as polymer electrolyte membrane fuel cells , are a type of fuel cell being developed for transport applications as well as for stationary fuel cell applications and portable fuel cell applications....
s.

Principle

Electroosmotic pumps are fabricated from silica
Silicon dioxide

The chemical compound 'silicon dioxide', also known as 'silica' , is an oxide of silicon with a chemical formula of and has been known for its hardness since antiquity....
 nanospheres or hydrophilic porous glass, the pump
Pump

A pump is a device used to move fluids, such as gases, liquids or Slurry. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure....
ing mechanism is generated by an external electric field applied on an electric double layer
Electrical double layer

The electrical double layer is a structure that describes the variation of electric potential near a surface, and has a large bearing on the behaviour of colloids and other surfaces in contact with solutions and solid state fast ion conductors....
 (EDL), generates high pressures (more than 340 atm
Atmosphere (unit)

The standard atmosphere is an international reference pressure defined as 101,325 Pascal and formerly used as unit of pressure . For practical purposes it has been replaced by the Bar which is 100,000 Pa....
 (34 MPa) at 12 kV applied potentials) and high flow rates (e.g., 40 ml
Litre

The litre or liter is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case . The lower case L is often written as a cursive l to avoid confusion with the number 1 in antiqua fonts....
/min at 100 V
Volt

The volt is the SI SI derived unit of electric potential difference or electromotive force, commonly known as voltage. It is named in honor of the Lombard physicist Alessandro Volta , who invented the voltaic pile, possibly the first chemical battery ....
 in a pumping structure less than 1 cm³ in volume). EO pumps are compact, have no moving parts, and scale favorably with fuel cell design. The EO pump might drop the parasitic load of water management in fuel cells from 20% to 0.5% of the fuel cell power.

Types


Cascade electroosmotic pump

High pressures and flow rates are obtained by positioning several regular electroosmotic pumps parallel to each other in a cascade
Cascade

A cascade is a type of waterfall or a series of waterfalls.Cascade may also refer to:...
.

Porous electroosmotic pump

Porous pumping is created by the use of sintered glass. .

Planar shallow electroosmotic pump

Planar shallow electroosmotic pumps are made of parallel shallow microchannel
Microchannel

Microchannel can refer to* Basic structure used in microtechnology, see Microchannel_.* Micro Channel architecture in computing...
s.

See also

  • Electroosmotic flow
    Electroosmotic flow

    Electroosmotic flow is the motion of liquid induced by an applied potential across a capillary tube or microchannel. Electroosmotic flow is an essential component in chemical separation techniques, notably capillary electrophoresis....
  • Capillary electrophoresis
    Capillary electrophoresis

    Capillary electrophoresis , also known as capillary zone electrophoresis , can be used to separate ionic species by their charge and frictional forces....
  • Microfluidics
    Microfluidics

    Microfluidics deals with the behavior, precise control and manipulation of fluids that are geometrically constrained to a small, typically sub-millimeter, scale....
  • Micropump
    Micropump

    Although any kind of small pump is often referred to as micropump, a more accurate and up-to-date definition restricts this term to pumps with functional dimensions in the micrometre range....
  • Sol-gel
  • Glossary of fuel cell terms
    Glossary of fuel cell terms

    The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this fuel cell glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but a few....


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