Patent · US Active

Thin film composite osmosis membranes

US8960448B2 · kind B2 · utility

1Cited by

3References

28Claims

0Family size

Assignee

NATIONAL UNIVERSITY OF SINGAPORE · SG

Inventors

How Yong Ng · Singapore, SG
Wei Duan · Haidian District, CN

Key dates

Filing date	Dec 26, 2012
Grant date	Feb 24, 2015
Priority date	—
Expiry date	Dec 26, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02A20/131
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A two-layered osmosis membrane contains a support layer and a rejection layer. The support layer, in which a mesh is embedded, is made of a phase separation polymer and has a thickness of 50 to 200 μm. The rejection layer, which adheres to the support layer, is made of a thin film composite polymer and has a thickness of 0.05 to 3 μm. The mesh, which is embedded in the support layer, has an open area of 30 to 70%, a mesh size of 60-300 mesh, and a thickness of 45-150 μm. Also disclosed is a method of making the above described membrane.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.