EP 1315851 A1 20030604 - METHOD FOR ETCHING AT LEAST ONE ION TRACK TO A PORE IN A MEMBRANE AND ELECTROLYTIC CELL FOR PREPARING SAID MEMBRANE
Title (en)
METHOD FOR ETCHING AT LEAST ONE ION TRACK TO A PORE IN A MEMBRANE AND ELECTROLYTIC CELL FOR PREPARING SAID MEMBRANE
Title (de)
VERFAHREN ZUM ÄTZEN MINDESTENS EINER IONENSPUR ZU EINER PORE IN EINER MEMBRANE UND ELEKTROLYTISCHE ZELLE ZUR PRÄPARIERUNG EINER SOLCHEN
Title (fr)
PROCEDE D'ATTAQUE D'AU MOINS UNE PISTE IONIQUE POUR OBTENIR UN PORE DANS UNE MEMBRANE ET CELLULE ELECTROLYTIQUE DESTINEE A PREPARER LADITE MEMBRANE
Publication
Application
Priority
- DE 10044565 A 20000908
- EP 0109911 W 20010829
Abstract (en)
[origin: WO0220877A1] A membrane consisting of dielectric material such as an organic polymer, separates two chambers of an electrolytic cell from each other. The membrane is produced using an etching solution which is provided in one of the chambers. Said etching solution contains active etching ions which etch the organic polymer. The other chamber contains a solution which does not have an etching action. An electrical field is generated through the membrane with an electrode that is dipped into the respective electrolytes and a voltage source connecting the two electrodes. The etching process makes its way along the ion tracks on one side, through the membrane and first produces one funnel-shaped pore per ion track. Immediately prior to the breakthrough, the ions which do not have an etching action begin to penetrate the still existent thin layer with fine pores - the active layer - and to displace the ions with an etching action at the exit point. An intensified electric current, driven by the adjacent field, is established. The etching process on the floor of the pore shifts sideways according to the concentration of etching ions still present. The process can be stopped by deactivating the field and washing the membrane and the sole size, i.e. the active layer size, adjusted. A membrane produced in this way can be operated as an electrochemical valve and can be used with one or more pores as a sensor or with many pores to control concentration.
IPC 1-7
IPC 8 full level
B01D 67/00 (2006.01); C25F 3/02 (2006.01)
CPC (source: EP US)
B01D 67/003 (2013.01 - EP US); B01D 67/0032 (2013.01 - EP US); C25F 3/02 (2013.01 - EP US); B01D 2325/26 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0220877 A1 20020314; DE 10044565 A1 20020404; DE 10044565 B4 20050630; EP 1315851 A1 20030604; US 2005072689 A1 20050407; US 7001501 B2 20060221
DOCDB simple family (application)
EP 0109911 W 20010829; DE 10044565 A 20000908; EP 01962978 A 20010829; US 96149903 A 20030306