Ionic conductor and method of producing the same

• US 20050003275A1
• Filed: 02/02/2004
• Published: 01/06/2005
• Est. Priority Date: 01/31/2003
• Status: Abandoned Application

• Current Assignee: Ebara Corporation
• Original Assignee: Ebara Corporation
• Inventors: Nagasawa, Hiroshi
• Application Number:
  US10/768,182
• Publication Number:
  US 20050003275A1
• Time in Patent Office: Days
• US Class Current: 429/304
• CPC Class Codes: C25B 13/04 characterised by the material

Abstract

The present invention relates to an ionic conductor and a method of producing the ionic conductor, and more particularly to an ionic conductor for use in an ionics element such as a diaphragm and an ionics instrument such as an electrolysis apparatus, and a method of producing such an ionic conductor. The ionic conductor according to the present invention includes a porous body 1 which has a plurality of continuous pores 1a passing through the porous body 1, and ionizable functional groups 2 attached to surfaces of the continuous pores 1a. The porous body 1 comprises a porous ceramics such as a porous glass, a porous alumina, or a porous mullite.

Claims

1. An ionic conductor comprising:

a porous body which has a plurality of continuous pores passing through said porous body; and

ionizable functional groups attached to surfaces of said continuous pores.

2. An ionic conductor according to claim 1, wherein said porous body comprises a porous ceramics.

3. An ionic conductor according to claim 2, wherein said porous ceramics comprises a porous glass, a porous alumina, or a porous mullite.

4. An ionic conductor according to claim 1, wherein an average diameter of said continuous pores is in the range of 1 nm to 1 μ

m, and a porosity of said porous body is in the range of 5 to 90%.

5. An ionic conductor according to claim 1, wherein hydrophobic groups are attached to the surfaces of said continuous pores.

6. An ionic conductor according to claim 5, wherein said hydrophobic groups are alkyl groups or fluorocarbon functional groups.

7. An ionic conductor according to claim 1, wherein said porous body has a plate-like shape, a pipe-like shape, or a honeycomb shape.

8. A method of producing an ionic conductor, said method comprising;

preparing a porous body which has a plurality of continuous pores passing through said porous body; and

attaching ionizable functional groups to active groups being present on surfaces of said continuous pores by a covalent bond or a hydrogen bond.

9. A method of producing an ionic conductor, said method comprising:

preparing a porous body which has a plurality of continuous pores passing through said porous body;

bonding hydrophobic groups to active groups being present on surfaces of said continuous pores; and

attaching one of anionic surface active agents, cationic surface active agents, and amphoteric surface active agents, each of which has ionizable functional groups and one or alkyl groups and fluorocarbon functional groups, to said hydrophobic groups.

10. An ionic conductive diaphragm comprising an ionic conductor, characterized in that:

said ionic conductor comprises a porous body which has a plurality of continuous pores passing through said porous body, and ionizable functional groups attached to surfaces of said continuous pores.

11. An ionics element comprising an ionic conductor, characterized in that:

said ionic conductor comprises a porous body which has a plurality of continuous pores passing through said porous body, and ionizable functional groups attached to surfaces of said continuous pores.

12. An ionics instrument having an ionic conductor, characterized in that;

said ionic conductor comprises a porous body which has a plurality of continuous pores passing through said porous body, and ionizable functional groups attached to surfaces of said continuous pores.