Superoleophobic membranes for oil/water separation

US10843139B2 · kind B2 · utility

Assignee

• The Trustees of the University of Pennsylvania · US

Inventors

• Shu Yang · Blue Bell, US
• Daeyeon Lee · Lansdowne, US
• Zhiwei Liao · Philadelphia, US
• Gaoxiang Wu · Philadelphia, US

Key dates

• Filing date: Jun 28, 2017
• Grant date: Nov 24, 2020
• Expiry date: Jun 28, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2305/08
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present disclosure provides compositions comprising anisotropic chain-like silica nanoparticles functionalized with hydrophilic groups. The anisotropic chain-like silica nanoparticles comprise linked arrays of charged silica nanoparticles, each linked array have at least one linear dimension of from about 100 nm to about 1200 nm and the anisotropic chain-like silica nanoparticles each in have a diameter of from about 10 nm to about 500 nm. These compositions are superoleophobic in the presence of water, e.g., when submerged in water. Also provided are layered coatings comprising these compositions, substrates comprising the layered coatings, articles comprising the layered coatings, methods of filtering a mixture of water and an oil using the compositions described herein, and methods of preparing a superoleophobic coating on a substrate using the compositions described herein.