Thin film composite membrane structures

Provided are thin film composite membrane structures comprising a selective membrane layer for ion rejection attached to a support layer. The support layer comprises a multi-zone microfiltration membrane. The multi-zone microfiltration membrane comprises: a porous support material; and at least two...

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Bibliographische Detailangaben
Hauptverfasser:	MEYERING MARK T, MCCUTCHEON JEFFREY R, HUANG LIWEI, HAMLIN THOMAS J
Format:	Patent
Sprache:	eng
Schlagworte:	PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	Provided are thin film composite membrane structures comprising a selective membrane layer for ion rejection attached to a support layer. The support layer comprises a multi-zone microfiltration membrane. The multi-zone microfiltration membrane comprises: a porous support material; and at least two microfiltration zones, wherein a first zone comprises a first membrane and a second zone that is attached to the first zone and that coats at least a portion of the porous support material. The thin film composite membrane structures may be provided in reverse osmosis systems or nanofiltration systems. Also, thin film composite membrane structures may be provided in direct osmotic concentration systems, forward osmosis systems, or pressure retarded osmosis systems.