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US 2018/0008939 A1Published application
Method of preparing thin film composite forward osmosis membranes using polyethylene porous supports
AssigneeKorea University Research and Business Foundation
InventorsJung-hyun Lee, Sang Hee Park, Soon Jin Kwon
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Abstract
The present invention relates to a thin film composite forward osmosis membrane with a polyethylene porous support, and a thin film composite forward osmosis membrane which is low cost, has excellent durability and chemical resistance, and outstanding performance (water flux and specific salt flux) may be provided in the present invention.
Claims19
A thin film composite membrane for forward osmosis, comprising:
- a polyethylene support;
- and
- a selective layer formed on the polyethylene support,
- wherein the thin film composite membrane has a structural parameter (S) of 1000 μm or less calculated by the following Equation 1:
- S
- =
- D
- J
- w
-
- ln
-
- (
- B
- +
- A
-
-
- π
- D
- ,
- b
- B
- +
- J
- w
- +
- A
-
-
- π
- F
- ,
- m
- )
- [
- Equation
-
-
- 1
- ]
- wherein Jw is water flux, A is a water permeability coefficient, B is a salt permeability coefficient, D is a sodium chloride (NaCl) diffusion coefficient of 1.48×10−9 m2s−1, πD,b is an osmotic pressure of a draw solution, and πF,m is an osmotic pressure of feed water contacting a surface of a membrane.
39 more elements
Dependencies are inferred from the claim text.