Method for producing a superhydrophobic membrane or surface coating of a substrate

US10428184B2 · kind B2 · utility

Assignee

• Universitat Bayreuth · DE

Inventors

• Andreas Greiner · Amöneburg, DE
• Seema Agarwal · Marburg, DE
• Mitsunobu Doimoto · Somalomo, CM

Key dates

• Filing date: Apr 9, 2015
• Grant date: Oct 1, 2019
• Expiry date: Mar 18, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2429/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention concerns a method for producing a superhydrophobic membrane or surface coating of a substrate from an aqueous phase comprising the following steps: a) Preparing an aqueous dispersion by dispersing particles of hydrophobic polymer(s) in an aqueous solution of protic polymer(s), wherein the protic polymer(s) and the hydrophobic polymer(s) are present in a weight ratio of protic polymer(s):hydrophobic polymer(s) in a range of 5:95 to 22:78, b) electrospinning the dispersion of step a) onto a carrier for producing the membrane or onto the surface for producing the surface coating thereby producing at least one fiber and a nonwoven fabric from the fiber, c) subjecting the nonwoven fabric to a sol-gel process, wherein a precursor/precursors of the sol-gel comprise(s) an alkoxysilane, and d) curing the nonwoven fabric obtained by step c) at a temperature in a range of 50° C. to 150° C.