Nitto-denko Corporation

Makoto Kobuke

Shijun Zheng

Peng Wang

Shunsuke Noumi

Craig Roger Bartels

Isamu Kitahara

Weiping Lin

Yuji Yamashiro

Masahiko Hirose

Yasuhiro Uda

John Ericson

Rebecca Romero

Ozair Siddiqui

Wanyun Hsieh

Described herein is a crosslinked graphene and biopolymer (e.g. lignin) based composite membrane that provides selective resistance for solutes while providing water permeability. The membrane may include optional additional functional additives in a crosslinked material matrix that provides enhanced salt separation from water. Methods for making such membranes, and methods of using the membranes for dehydrating or removing solutes from water are also described.

Selectively permeable graphene oxide membrane

Described herein is a graphene material based membrane that provides selective resistance for solutes or gas while providing water permeability. A selectively permeable membrane comprising graphene oxide, reduced graphene oxide, and also functionalized or crosslinked between the graphene, that provides enhanced salt separation from water or gas permeability resistance, methods for making such membranes, and methods of using the membranes for dehydrating or removing solutes from water are also described.

A spiral-wound forward osmosis membrane element () includes: a membrane leaf () in which an internal flow path extending from a first opening (A) to a second opening (B) is formed; and a central tube () around which the membrane leaf () is wound and which has a feed hole (A) communicating with the first opening (A) and a collection hole (B) communicating with the second opening (B). The central tube () has an interior partitioned to include an inflow region (A) communicating with the feed hole (A) and an outflow region (B) communicating with the collection hole (B) so that the inflow region (A) and the outflow region (B) each form a flow path extending continuously in an axial direction of the central tube () from one end to the other end of the central tube (). Since a liquid fed into the inflow region (A) is discharged to the outside without passing through two or more internal flow paths (), the pressure loss in the spiral-wound forward osmosis membrane element () is reduced. Thereby, it is possible to provide a spiral-wound forward osmosis membrane element in which the pressure loss of the flow of a fluid is reduced.

Spiral-wound forward osmosis membrane element and forward osmosis membrane module

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Osaka, Japan

Makoto Kobuke