Separation membrane and water treatment device including the same

Patent metadata

Field	Value
Publication number	US-9540255-B2
Application number	US-201313900702-A
Country	US
Kind code	B2
Filing date	May 23, 2013
Priority date	May 24, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A forward osmosis water treatment device may use a separation membrane including a polymer layer introduced with a functional group having an affinity for an osmosis draw solute present in an osmosis draw solution.

First claim

What is claimed is:

1. A forward osmosis water treatment device comprising:
a first housing including a feed solution receiving part configured to receive a feed solution, an osmosis draw solution receiving part configured to receive an osmosis draw solution, a separation membrane between the feed solution receiving part and the osmosis draw solution receiving part, the feed solution including a subject material to be separated therefrom, the osmosis draw solution including an osmosis draw solute, the osmosis draw solution having a higher osmotic pressure concentration than the feed solution, the separation membrane including a polymer layer, the polymer layer including a functional group having an affinity for the osmosis draw solute in the osmosis draw solution, the polymer layer of the separation membrane including a polysulfone (PS)-polyalkylene oxide (PAO) copolymer or a polysulfone (PS)-based polymer derivative including —COOH substituted in an aromatic group of a backbone of the polysulfone (PS)-based polymer derivative, the separation membrane further including a separation membrane layer stacked on the polymer layer, the separation membrane layer being permeable to water and non-permeable to the subject material to be separated, the separation membrane disposed in the first housing such that the polymer layer faces the osmosis draw solution receiving part, and the separation membrane layer faces the feed solution receiving part;
a second housing configured to store the osmosis draw solution, to supply the osmosis draw solution to the first housing, and to recover the osmosis draw solution from the first housing; and
a recovery member configured to separate and recover the osmosis draw solute of the osmosis draw solution.

2. The forward osmosis water treatment device of claim 1 ,
wherein the osmosis draw solute of the osmosis draw solution comprises CO 2 or NH 3 .

3. The forward osmosis water treatment device of claim 1 , wherein the osmosis draw solute of the osmosis draw solution comprises a monovalent or divalent ionic compound.

4. The forward osmosis water treatment device of claim 1 , wherein the separation membrane layer comprises a polymer matrix, the polymer matrix of the separation membrane layer being different from a polymer of the polymer layer.

Assignees

• Samsung Electronics Co Ltd
• Iucf-Hyu (Industry-University Coop Found Hanyang University)

Inventors

• Kang Hyo
• Moon Jun Hyuk
• Park Ho-Bum
• Han Sung Soo
• Kim Hyo Won
• Cho Young Hoon

Classifications

• B01D2311/25

  Recirculation, recycling or bypass, e.g. recirculation of concentrate into the feed · CPC title

• B01D71/68

  Polysulfones; Polyethersulfones · CPC title

• B01D69/10

  Supported membranes; Membrane supports · CPC title

• B01D69/12

  Composite membranes; Ultra-thin membranes · CPC title

• B01D71/80

  Block polymers · CPC title