Porous film and method of preparation thereof

Details Porous film and method of preparation thereof Porous film and method of preparation thereof

C - Chemistry, Metallurgy

25

D

C25D 3/02 (2006.01) C25D 1/04 (2006.01)

Patent

CA 2295223

A method of preparing a porous film comprises electrodepositing material from a mixture onto a substrate, the mixture comprising: (I) a source of metal, inorganic oxide, non-oxide semiconductor/conductor or organic polymer; (II) a solvent such as water; and (III) a structure-directing agent such as octaethylene glycol monododecyl ether to form an homogenous lyotropic liquid crystalline phase in the mixture. Electrodepositing the film from a lyotropic liquid phase in this manner provides a porous film having a substantially regular structure and substantially uniform pore size.

Cette invention se rapporte à un procédé de fabrication d'un film poreux consistant en l'électrodéposition sur un substrat d'une matière provenant d'un mélange, ledit mélange comprenant (I) une source de métal, d'oxyde inorganique, de conducteur/semi-conducteur non oxyde ou de polymère organique; (II) un solvant tel que l'eau et (III) un agent susceptible d'induire une direction structurale, tel qu'un éther monododécylique d'octaéthylèneglycol, et servant à former une phase cristalline, liquide, lyotropique et homogène dans le mélange. Une telle formation du film par électrodéposition à partir d'une phase liquide et lyotropique permet d'obtenir un film poreux possédant une structure sensiblement régulière et une taille de pores sensiblement uniforme.

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