Method of manufacturing for aromatic polyamide composite membrane

A technology of aromatic polyamide and aromatic amine, applied in the direction of polyamide coating, coating, etc., can solve the problem that it is difficult to express the intrinsic properties of dendrimers

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

AI Technical Summary

Problems solved by technology

However, this method has the disadvantage that it is difficult to express the intrinsic properties of the dendrimer because the bond between the dendrimer and the membrane is more like a physical bond and makes the dendrimer easy to desorb.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A porous polysulfone substrate with a thickness of 150 μm was immersed in an aqueous solution of 2 wt % m-phenylenediamine and 0.05 wt % polyamidoamine dendrimer (generation 1) for 1 min, and the excess aqueous solution was removed from the The substrate is removed. The porous polymer substrate thus treated was dipped again into an organic solution of 0.2% by weight trimesoyl chloride for about 1 minute. After completing the reaction, the coated polysulfone substrate was dried in air for 1 minute, and washed with a low-concentration carbonate aqueous solution for 30 minutes at room temperature, thereby forming an aramid composite membrane.

Embodiment 2

[0048] A porous polysulfone substrate having a thickness of 150 μm was dipped in an aqueous solution of 2% by weight of m-phenylenediamine for 1 minute, and the excess aqueous solution was removed from the substrate by a rubber roller.

[0049] The porous polymeric substrate thus treated was dipped again into an organic solution of 0.2 wt% trimesoyl chloride and 0.05 wt% polyamidoamine dendrimers (generation 1) containing acid halide-substituted terminals for about 1 minute. When the reaction was completed, the coated polysulfone substrate was dried in air for 1 minute, and washed with a low-concentration carbonate aqueous solution for 30 minutes at room temperature, thereby forming an aramid composite membrane.

Embodiment 3 to 6

[0051] Aramid composite membranes were prepared by the same procedure as in Example 1, except that the polyamidoamine dendrimer species added to the aqueous solution of m-phenylenediamine solution was changed as shown in Table 1 below.

[0052] Table 1

[0053] project (section)

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PUM

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Abstract

The present invention provides a method of manufacturing an aromatic polyamide composite membrane comprising: coating an aqueous solution containing polyfunctional aromatic amine to a porous polymer substrate; and reacting the coated substrate with an organic solution containing polyfunctional aromatic acyl halide to lead to interfacial condensation polymerization between the polyfunctional aromatic amine and the polyfunctional aromatic acyl halide so that the reaction product resulting from the interfacial condensation polymerization is coated on the surface of the substrate, characterized in that either of the aqueous solution containing polyfunctional aromatic amine or the organic solution containing polyfunctional aromatic acyl halide has dendritic polymer as one of polyfunctional compounds added thereto. The resulting aromatic polyamide composite membrane which includes dendrimer as polyfunctional compound, exhibits high salt rejection rate and water flux.

Description

technical field [0001] The present invention relates to a method for preparing an aromatic polyamide composite membrane, and more particularly, to a method for preparing a novel aromatic polyamide composite membrane containing Dendrimer and has high salt rejection and water flux. [0002] Aramid composite membranes (or sometimes called reverse osmosis membranes) are known to have excellent salt rejection and water flux and can be used in a wide range of applications including: water purifiers for domestic applications, industrial ultrapure Water production, wastewater treatment, seawater desalination, etc. In order to improve the performance of aramid composite membranes, intensive research and investigation are now being conducted. Background technique [0003] Aramid composite membranes are prepared by coating the surface of porous polymer substrates by interfacial polycondensation between polyfunctional aromatic amines and polyfunctional aromatic acid halides, as disclo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22
CPCC08G69/02C08J5/2256C08J7/06C08J2300/202C08J2377/00C08L77/00C08L79/02C09D177/00
Inventor 柳在姬崔成学李光珍
Owner KOLON IND INC
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