Verfahren zur Verbesserung der Membranbeschichtungseigenschaften für Ionenaustauschmembrananwendungen und Maschengewebe mit Verbesserten Membranbeschichtungseigenschaften für Ionenaustauschmembrananwendungen

Details

Veröffentlichungs-Nr.

EP4759992

Anmeldetag

10. Dezember 2024

Veröffentlichung

17. Juni 2026

Rechtsraum

EP

Abstract

The invention relates to a method for improving membrane coating properties for ion exchange membrane applications of woven mesh fabric as a reinforcement fabric, the woven mesh fabric comprising warp and weft monofilament fibers of at least one of the following polymers: polyphenylene sulfide, a polyether ether ketone and liquid crystal polyester, wherein one monofilament fiber is made of only one of the polymers. The method comprises after weaving the woven mesh fabric a fixation step, wherein the woven mesh fabric is subjected to at least one thermal treatment to fix the mesh opening into desired dimensions and stabilize the monofilament fibers of the woven mesh fabric as well as to remove surface contaminants from the monofilament fibers, and one or more preparation steps are carried out comprising a plasma pre-treatment step and/or a plasma etching step. Further the method comprises a subsequent coating step of depositing a plasma coating on the woven mesh fabric by means of plasma polymerization incorporating functional groups at least one selected from a group consisting of hydroxyl group, carboxyl group, amino group and sulfonate group, wherein the woven mesh fabric comprises a filament diameter between 10 µm and 60 µm and a mesh opening of 20 µm or more and having a fabric thickness between 20 µm and 80 µm.

Anmelder

Firma

Sefar AG

Land

🇨🇭 Schweiz