Thin film composite osmosis membranes
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United States of America Patent
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Feb 24, 2015
Grant Date -
May 2, 2013
app pub date -
Dec 26, 2012
filing date -
Sep 22, 2011
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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.
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