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US 8,181,794 B2Granted
Forward osmosis membranes
AssigneeOasys Water, Inc.
InventorsRobert McGinnis, Gary McGurgan
Life of this patent
Estimating the term…
Abstract
Forward osmosis membranes include an active layer and a thin support layer. A bilayer substrate including a removable backing layer may allow forward osmosis membranes with reduced supporting layer thickness to be processed on existing manufacturing lines.
Claims15
A method of making a forward osmosis membrane, comprising:
- providing a support structure comprising a bilayer substrate including first and second separable layers;
- applying a material to the first layer of the bilayer substrate of the support structure to form a membrane support layer;
- applying a barrier material to the membrane support layer to form the forward osmosis membrane;
- and
- separating the second layer of the bilayer substrate from the first layer of the bilayer substrate to form the forward osmosis membrane.
2 more elements
A method of making a forward osmosis membrane, comprising:
- providing a support structure comprising a bilayer substrate including first and second separable layers;
- applying a material to the first layer of the bilayer substrate to form a membrane support layer, such that the material penetrates at least a portion of the first layer of the bilayer substrate and only partially penetrates the second layer of the bilayer substrate;
- applying a barrier material to the membrane support layer to form the forward osmosis membrane;
- separating the second layer of the bilayer substrate from the first layer of the bilayer substrate;
- and
- modifying a pore structure of the support layer.
3 more elements
A method of making a forward osmosis membrane, comprising:
- providing a support structure comprising a bilayer substrate including first and second separable layers, wherein the first layer has a Frazier air permeability of greater than 100 cfm/ft2-min;
- applying a material to the first layer of the bilayer substrate to form a membrane support layer;
- applying a barrier material to the membrane support layer to form the forward osmosis membrane;
- and
- separating the second layer of the bilayer substrate from the first layer of the bilayer substrate to form the forward osmosis membrane.
2 more elements
Dependencies are inferred from the claim text.