Microporous articles with a three-dimensional porous network of acid-sintered interconnected silica nanoparticles and methods of making the same

US10328389B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Xuan Jiang · Shanghai, CN
• Kuan-Yin Lin · Woodbury, US
• Michelle M. Mok · Okabena, US
• Naiyong Jing · Woodbury, US
• Derek J. Dehn · Maplewood, US
• Richard J. Pokorny · Maplewood, US
• Ta-Hua Yu · Woodbury, US

Key dates

• Filing date: Apr 3, 2015
• Grant date: Jun 25, 2019
• Expiry date: Oct 14, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Articles are described including a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and a first silica layer directly attached to the first major surface of the first microfiltration membrane layer. The first silica layer includes a polymeric binder and acid-sintered interconnected silica nanoparticles arranged to form a continuous three-dimensional porous network. A method of making an article is also described, including providing a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and forming a first silica layer on the first major surface.