Method for producing antifouling coatings made of thin-layer composite membranes for reverse osmosis and nanofiltration

US10561990B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• IAB Ionenaustauscher GmbH · DE

Inventors

• Uwe Spohn · Bodenwerder, DE
• Ulrike Hirsch · Bodenwerder, DE
• Marco Rühl · Bitterfeld-Wolfen, DE
• Nico Teuscher · Bodenwerder, DE
• Andreas Heilmann · Borsdorf, DE
• Carsten Schellenberg · Basel, CH

Key dates

• Filing date: Aug 12, 2015
• Grant date: Feb 18, 2020
• Expiry date: Nov 11, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2325/48
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a combined method for gentle molecular surface functionalisation of the very thin, selectively-acting separating layer which preferably consists of aromatic polyamides, polyurethanes and/or polyureas, of thin-film composite membranes for reverse osmosis (hyperfiltration) and for nanofiltration, subsequently collectively termed water-filtration membranes, in order to achieve a passive antifouling effect without impairing the selectivity of the water-selective separating layer made of polyamides and the water-permeability of the membrane.