A preparation method of antifouling and chlorine-resistant aromatic polyamide composite film

A technology of aromatic polyamide and composite membrane, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve marine biological pollution and other problems, and achieve high desalination rate, high stability of resistance to chlorine and oxygen, and stable performance lasting effect

Active Publication Date: 2017-09-29
中复新水源科技有限公司
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  • Description
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  • 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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  • A preparation method of antifouling and chlorine-resistant aromatic polyamide composite film
  • A preparation method of antifouling and chlorine-resistant aromatic polyamide composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of anti-fouling and chlorine-resistant aromatic polyamide composite membrane (1)

[0032] Step 1 Preparation of Aramid Composite Membranes Containing Primary Amino Groups on the Surface

[0033]According to the methods and operating steps disclosed in Journal of Membrane Science 428 (2013) 403-409 or Journal of Membrane Science 457 (2014) 88-97 or CN103349922, on the surface of the 10*10cm square microporous polysulfone support membrane, pass through the Interfacial polymerization of phenylenediamine and trimesoyl chloride to prepare a nascent aromatic polyamide composite film containing acid chloride groups on the surface, dipping the nascent aromatic polyamide composite film containing acid chloride groups on the surface in ethylenediamine, and controlling the temperature at Between 50 and 55°C, after amidation reaction for 2 hours, filter out the membrane, use 10% by mass percentage of sodium carbonate aqueous solution and deionized water, wash ...

Embodiment 2

[0038] Example 2 Preparation of anti-fouling 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] Example 3 Preparation of anti-fouling 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 method for preparing an anti-fouling and chlorine-resistant aromatic polyamide composite film. Firstly, the acid chloride groups exposed on the surface of the nascent aromatic polyamide composite film are subjected to amidation reaction with organic polyamines to prepare aromatic polyamides containing primary amine groups on the surface. Polyamide composite film; secondly, the condensation reaction of the aromatic polyamide composite film containing primary amino groups on the surface and N, N, N-trihydrocarbyl-N-(4-hydroxyl-3-formyl benzyl) ammonium chloride , the aromatic polyamide composite film containing salicylaldehyde Schiff base and quaternary ammonium cation on the surface was prepared; finally, the aromatic polyamide composite film containing salicylaldehyde Schiff base and quaternary ammonium cation on the surface was in contact with the antibacterial metal salt solution, and coordination reaction, and the aromatic polyamide composite film containing antibacterial metal ions, salicylaldehyde Schiff bases and quaternary ammonium cations on the surface was prepared.

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 polyamides thin film composite membrane (APA-TFC membrane) is made of an ultra-thin aromatic polyamide membrane deposited on a porous polysulfone or polyethersulfone support membrane, and its water flux Large, high desalination rate, has become the mainstream product of seawater desalination. In my country's 12th Five-Year Development Strategy, reverse osmosis seawater desalination technology is regarded as a key issue that needs to ...

Claims

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Application Information

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Patent Type & Authority Patents(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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