Article having a nanotextured surface with superhydrophobic properties

US8298649B2 · kind B2 · utility

Assignees

• Essilor International (Compagnie Generale d'Optique) · FR
• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR

Inventors

• Mathilde Reyssat · Antony, FR
• Yong Chen · Longbeilingcun, CN
• Anne Pepin · Paris, FR
• David Quere · Paris, FR
• Claudine Biver · Charenton-le-Pont, FR
• Laurianne Vagharchakian · Charenton-le-Pont, FR

Key dates

• Filing date: Feb 29, 2008
• Grant date: Oct 30, 2012
• Expiry date: Apr 17, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to an article having a nanotextured surface with superhydrophobic properties, comprising an array of vertical tabs, preferably regular, wherein the pillar array fulfils the following conditions: the surface fraction of the pillars Øs is such that 3%≦Øs≦13%, preferably 5%≦Øs≦12%, preferably 5%≦Øs≦13%, even better 5.5%≦Øs≦13%, even better 6%≦Øs≦13%, and better still 8%≦Øs≦13%; the pitch p of the array is such that 100 nm≦p≦250 nm; the height h of the pillars is such that 100 nm≦h≦400 nm, preferably 250≦h≦400 nm, even better 300≦h≦400 nm; and the lateral surface of the pillars is inclined at most by an angle of ±20°, preferably ±10° or even better ±5°, in relation to the vertical axis of the pillars.