Thin polymer membrane for treatment of saline water
AssigneeThe Hong Kong University of Science and Technology
InventorsPing Gao, Ping Sheng, Qiao Gu, Qinghua Zhang, Jin Li, Runlai Li
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Abstract
An ultra high molecular weight polyethylene (UHMWPE) membrane has at least one nanoporous UHMWPE film, where each of the nanoporous UHMWPE film is biaxial oriented with a thickness of 0.1 to 12 μm and pores that exclude particles in excess of 10 nm with a total porosity of 65 to 75 percent. The nanoporous UHMWPE film can be coated or laminated by a hydrophilic polymer to form a Janus membrane and can be made with a multilayer composite structure. The UHMWPE membrane can be used in a device for molecular distillation (MD), reverse osmosis (RO), or forward osmosis (FO).
Claims19
A membrane comprising ultra high molecular weight polyethylene (UHMWPE), the membrane comprising at least one nanoporous UHMWPE film, each of the nanoporous UHMWPE film being biaxial oriented with pores that are exclusive to particles in excess of 10 nm with a total porosity of 65 to 75 percent,
- wherein the nanoporous UHMWPE film has a thickness greater than 0.1 μm but less than 12 μm, has an ultimate tensile strength of at least 400 MPa, and has a modulus of at least 1.4 GPa.
Dependencies are inferred from the claim text.