Omni-transparent and superhydrophobic coatings assembled from chain-like nanoparticles

US11365333B2 · kind B2 · utility

Assignee

• The Trustees of the University of Pennsylvania · US

Inventors

• Shu Yang · Blue Bell, US
• Gaoxiang Wu · Philadelphia, US
• Dengteng Ge · Songjiang, CN
• Yubo Zhao · 流花街道, CN

Key dates

• Filing date: May 9, 2017
• Grant date: Jun 21, 2022
• Expiry date: May 9, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2218/322
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention provides a layered coating adhered to a substrate surface which conforms to a surface topography defined by the anisotropic chain-like silica nanoparticles on the substrate. The layered coating comprises a layer of anisotropic chain-like silica nanoparticles. The anisotropic chain-like silica nanoparticles comprise linked arrays of silica net-negatively charged nanoparticles, each linked array having at least one linear dimension of about 100 nm to about 1200 nm and the anisotropic chain-like silica nanoparticles each have a diameter of about 20 nm to about 80 nm. The substrate surface comprises surface active moieties carrying a net positive charge and the chain-like anisotropic silica nanoparticles are held to the surface by electrostatic charge. Advantageously, the layered coatings are transparent and superhydrophobic. Also provided are articles containing these layered coatings.