Composite semipermeable membrane, spiral membrane element, water treatment system, and water treatment method
AssigneeNitto Denko Corporation
InventorsTomotsugu MIYABE, Masashi ECHIZEN
Life of this patent
Estimating the term…
Abstract
A composite semipermeable membrane 12 of the present invention includes a porous support membrane 12a and a skin layer 12b supported by the porous support membrane 12a. The membrane surface of the composite semipermeable membrane 12 has an elastic modulus of 250 MPa or more and 500 MPa or less as calculated by force curve measurement using AFM in water. A spiral membrane element 20 of the present invention includes the composite semipermeable membrane 12 of the present invention. A water treatment system 100 of the present invention includes the spiral membrane element 20 of the present invention.
Claims9
A composite semipermeable membrane comprising:
- a porous support membrane;
- and
- a skin layer supported by the porous support membrane, wherein
- a membrane surface of the composite semipermeable membrane has an elastic modulus of 250 MPa or more and 500 MPa or less as calculated by force curve measurement using AFM in water.
Dependencies are inferred from the claim text.