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Polyamide composite membrane and preparation method thereof

A composite membrane and polyamide technology, applied in the field of membrane separation, to achieve the effect of simplifying the membrane making process, good anti-pollution performance, and good hydrophilicity

Inactive Publication Date: 2017-04-26
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides a polyamide composite membrane and a preparation method thereof, by reacting an aqueous polyamine solution containing a tertiary amine additive with a polyacyl chloride solution to obtain a bulk-modified polyamide active layer, thereby solving the problem of The main problems existing in the current traditional polyamide composite membrane

Method used

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  • Polyamide composite membrane and preparation method thereof
  • Polyamide composite membrane and preparation method thereof

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Embodiment 1

[0048] In embodiment 1, tertiary amine additive is three (2-aminoethyl) amine, and structural formula is The polymer support layer of the composite membrane is a polysulfone microfiltration membrane. The preparation process of the composite membrane includes the following steps

[0049] (1) preparation mass fraction is the m-phenylenediamine aqueous solution of 3.4%, is added with mass fraction in this m-phenylenediamine aqueous solution and is 1% tris (2-aminoethyl) amine, the pH of this m-phenylenediamine aqueous solution is used Camphorsulfonic acid is adjusted to 9, the polysulfone-based microfiltration membrane is completely immersed in the m-phenylenediamine aqueous solution for 2 minutes, and then taken out, and the aqueous solution on the surface of the polysulfone-based microfiltration membrane is removed;

[0050] (2) preparation mass / volume fraction is the n-hexane solution of the trimesoyl chloride of 0.15%, this solution is poured on the upper surface of the p...

Embodiment 2

[0053] The experimental operation is the same as that in Example 1, except that in step (1), the mass fraction of tris(2-aminoethyl)amine in the m-phenylenediamine aqueous solution is 2%.

Embodiment 3

[0055] The experimental operation is the same as that in Example 1, except that in step (1), the mass fraction of tris(2-aminoethyl)amine in the m-phenylenediamine aqueous solution is 3%.

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Abstract

The invention relates to a polyamide composite membrane and a preparation method thereof, and belongs to the field of membrane separation. The composite membrane comprises a polymer support layer and a polyamide active layer composited on the polymer support layer; the polyamide active layer is obtained by carrying out a reaction of a polyamine aqueous solution containing a tertiary amine additive with a polyacyl chloride solution; in the preparation process, the polyamine aqueous solution containing the tertiary amine additive and the polyacyl chloride solution undergo interfacial polymerization, and the body modified polyamide active layer is obtained, so that the membrane preparation process is greatly simplified. The composite membrane has high water flux, low reverse salt flux, good anti-pollution performance and good membrane separation performance.

Description

technical field [0001] The invention belongs to the field of membrane separation, and more specifically relates to a polyamide composite membrane for water treatment and a preparation method thereof. Background technique [0002] Polyamide composite membrane is a kind of polymer membrane commonly used in membrane separation process. Polyamide composite membrane is prepared by the reaction of polyamine or alcohol (phenol) in water phase and polyacyl chloride or isocyanate in oil phase by interfacial polymerization. On the surface of the support layer, a dense ultra-thin active layer with a thickness of several hundred nanometers and a rough peak-valley morphology is formed. The traditional polyamide composite membrane is a highly cross-linked aromatic polyamide structure obtained by the reaction of m-phenylenediamine in the water phase and trimesoyl chloride in the oil phase. During the interfacial polymerization process, due to the high reactivity of the two monomers , at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/56B01D67/00
CPCB01D69/125B01D67/0002B01D71/56
Inventor 王艳申亮
Owner HUAZHONG UNIV OF SCI & TECH
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