Convective electrohydrodynamic fluid membranes

Details Convective electrohydrodynamic fluid membranes Convective electrohydrodynamic fluid membranes

1993-08-23

1995-08-15

Spear, Frank

Liquid purification or separation

Electrical insulating or electricity discharging

21050025, B01D 6308

Patent

active

054416396

ABSTRACT:
The present invention describes, an electroconvective liquid crystal membrane (ECLCM), comprised of a fluid layer contained between two gas permeable electrodes, thereby forming a sandwich like configuration. The electrodes separate distinct regions having different concentrations of one or more diffusant species and are capable of being accessed by the diffusant species. The fluid layer is comprised of any fluid in which an electrohydrodynamic (EHD) flow can be induced, including liquid crystals and liquid crystal-like fluids. The present invention encompasses fluid layers comprised of liquid crystals, such as N-(4-methoxybenzylidine)-4-butylaniline (MBBA), or polar solvents such as 2-ethyl-hexanol (2EH) and diethyl phthalate (DEP). The ECLCM includes means for applying an electric field to the fluid layer such that an EHD flow is induced within the fluid layer. The EHD flow alters the passage of the diffusant species across the ECLCM. The present invention includes a method for separating and purifying molecules.

REFERENCES:
patent: 5006211 (1991-04-01), Paleologou et al.

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