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Nano composite hollow fiber membrane and method of manufacturing the same

A hollow fiber membrane and nanofiltration technology, which is applied in chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as low strength, achieve high production capacity, excellent strength, and improve cleaning effects

Inactive Publication Date: 2008-07-23
KOLON IND INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nanofiltration separation membrane prepared by the above method has a problem in that its strength is too low since it has no reinforcing body

Method used

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  • Nano composite hollow fiber membrane and method of manufacturing the same

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Embodiment 1

[0050] 14% by weight of polysulfone was stirred and dissolved in 84% by weight of dimethylformamide (organic solvent), and then 2% by weight of polyethylene glycol was added thereto to prepare a transparent spin coating. After that, the spin-coating paint was supplied to a double-pipe nozzle with a diameter of 2.38 mmΦ while passing a tubular braid with an outer diameter of 2 mm through the center portion of the nozzle, thereby coating the spin-coating paint on the surface of the pipe nozzle, The tubular braid is then set with water, washed and dried. The coated and dried tubular braid was dipped in a dipping bath with an aqueous solution containing 2 wt. (TMC) in a dipping bath of n-decane solution, and react to form an active layer. Thereafter, the tubular braid was dried after removing the solution, thereby preparing a nanofiltration composite hollow fiber membrane.

[0051] The nanofiltration composite hollow fiber membrane thus prepared was potted in a commercial module...

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Abstract

Disclosed are a nanofiltration composite hollow fiber membrane and a method of manufacturing the same. The nanofiltration composite hollow fiber membrane includes a reinforcement (1) which is a tubular braid, a polymeric resin thin film (2) coated on the outer surface of the reinforcement (1), and a polyamide active layer (3) formed on the outer surface of the polymeric resin thin film. The present invention has an advantage of an excellent strength and an increase in membrane area relative to an installation area.

Description

technical field [0001] The present invention relates to a nanofiltration composite hollow fiber membrane (hereinafter referred to as "nanofiltration composite hollow fiber membrane") and a preparation method thereof, and more specifically, to such a nanofiltration composite hollow fiber membrane and a preparation method thereof , the nanofiltration composite hollow fiber membrane has excellent strength and can increase the membrane area because it is reinforced by a tubular braided reinforcement and a polyamide active layer is formed on its surface by interfacial polymerization. [0002] Hereinafter, in the present invention, a hollow fiber membrane or a separation membrane having an active layer sufficient to effectively filter multivalent ions while allowing passage of monovalent ions is referred to as a nanofiltration hollow fiber membrane or a nanofiltration separation membrane. [0003] Recently, with emphasis on the environment, there has been an increasing demand for po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56
CPCB01D69/12B01D69/02B01D69/085B01D69/087B01D2325/40B01D61/027B01D2325/24B01D71/56B01D69/0871B01D69/1216
Inventor 李武锡李光珍
Owner KOLON IND INC
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