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Preparation method of anti-pollution chlorine-resistant aromatic polyamide composite membrane

A technology of aromatic polyamide and composite membrane, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as marine biological pollution, achieve high desalination rate, high antifouling performance, and simple and easy preparation method line effect

Active Publication Date: 2016-01-20
中复新水源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the extension of use time, the problem of marine biological pollution is still serious

Method used

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  • Preparation method of anti-pollution chlorine-resistant aromatic polyamide composite membrane
  • Preparation method of anti-pollution chlorine-resistant aromatic polyamide composite membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1 Preparation of antifouling and chlorine-resistant aromatic polyamide composite membrane (1)

[0032] Preparation of the aromatic polyamide composite film containing primary amino groups on the surface of step 1

[0033]According to the methods and operating steps disclosed in JournalofMembraneScience428 (2013) 403-409 or JournalofMembraneScience457 (2014) 88-97 or CN103349922, on the surface of the 10*10cm square microporous polysulfone support membrane, m-phenylenediamine and trimethylene trimethyl Interfacial polymerization of acid chlorides to prepare nascent aromatic polyamide composite membranes containing acid chloride groups on the surface. The nascent aromatic polyamide composite membranes containing acid chloride groups on the surface are immersed in ethylenediamine, and the temperature is controlled between 50 and 55 °C. After the amidation reaction for 2 hours, filter out the membrane, use 10% sodium carbonate aqueous solution and deionized water...

Embodiment 2

[0038] Embodiment 2 Preparation of antifouling and chlorine-resistant aromatic polyamide composite membrane (2)

[0039] According to the method and operation steps of Example 1, the ethylenediamine in Step 1 of Example 1 is replaced with 1,3,5-triaminobenzene, and the surface containing copper ion and salicylaldehyde Schiff with the number (2) is obtained. Aromatic polyamide composite membrane of base and quaternary ammonium cation (abbreviated as APA / PS-TAB-QA-Cu-(2)).

Embodiment 3

[0040] Embodiment 3 Preparation of antifouling and chlorine-resistant aromatic polyamide composite membrane (3)

[0041] According to the method and operation steps of Example 1, the ethylenediamine in Step 1 of Example 1 was replaced with tris(3-aminopropyl)amine, that is to say, the surface containing copper ion, salicylaldehyde Schiff with the number (3) was obtained. Aromatic polyamide composite membrane of base and quaternary ammonium cation (abbreviated as APA / PS-TPA-QA-Cu-(3)).

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Abstract

The invention provides a preparation method of an anti-pollution chlorine-resistant aromatic polyamide composite membrane. The preparation method comprises that an acyl chloride group exposed on the surface of a new produced aromatic polyamide composite membrane and organic polyamine undergo an amidation reaction to produce an aromatic polyamide composite membrane with primary amino groups on the surface, the aromatic polyamide composite membrane with primary amino groups on the surface and ammonium N, N, N-trialkyl-N-(4-hydroxy-3-formylbenzyl)chloride undergo a condensation reaction to produce an aromatic polyamide composite membrane containing a salicylidene schiff base group and quaternary ammonium cations on the surface, and the aromatic polyamide composite membrane containing a salicylidene schiff base group and quaternary ammonium cations on the surface contacts with an antibacterial metal salt solution and undergoes a coordination reaction to produce the aromatic polyamide composite membrane containing antibacterial metal ions, a salicylidene schiff base and quaternary ammonium salt cations.

Description

technical field [0001] The invention relates to a preparation method of an anti-fouling and chlorine-resistant aromatic polyamide composite membrane, in particular to an anti-fouling and chlorine-resistant aromatic polyamide composite membrane loaded with three functional groups of antibacterial metal ions, salicylaldehyde Schiff base and quaternary ammonium cation on the surface The preparation method is applied to the seawater desalination process and belongs to the field of functional polymer materials. technical background [0002] Aromatic polyamide composite membrane (aromaticpolyamidesthinfilmcompositemembrane, APA-TFCmembrane) is made of an ultra-thin aromatic polyamide membrane deposited on a porous polysulfone or polyethersulfone support base membrane, which has large water flux and high desalination rate. It has become the mainstream product of seawater desalination. In my country's 12th Five-Year Development Strategy, reverse osmosis seawater desalination techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/78B01D67/00
Inventor 张田林
Owner 中复新水源科技有限公司
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