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Preparation method of dopamine-modified polysulfone membrane

A dopamine, polysulfone membrane technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve problems such as the degradation of the original membrane performance, and achieve the effects of simple operation, good effect and wide application.

Inactive Publication Date: 2016-05-18
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a dopamine-modified polysulfone membrane and its preparation method. The film-forming material is modified by the dopamine adhesion layer formed on the polysulfone powder, and then the film is formed by a phase inversion method to prepare a stable structure. , A film with uniform performance, which overcomes the defect of the performance reduction of the original film caused by the dopamine post-coating method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Dissolve 0.1815g of Tris in 300mL of distilled water, and adjust the pH to 8.5 with hydrochloric acid to obtain a Tris-HCl buffer solution;

[0024] (2) Dissolve 0.3 g of dopamine hydrochloride in the solution obtained in step (1) under magnetic stirring at room temperature, and quickly add 6.0 g of polysulfone powder and 10 mL of ethanol or isopropanol or glycerol;

[0025] (3) magnetically stirring the mixed solution obtained in step (2) at 25° C. for 6 h;

[0026] (4) Suction filter the product obtained in step (3), then wash with deionized water-centrifuge 3 times, then place the product in a vacuum dryer at 40°C and dry it to constant weight, that is, the dopamine-modified polysulfone powder ;

[0027] (5) Weigh 15 to 35 parts of polysulfone powder obtained in step (4), 2 to 5 parts of PVP, and 60 to 83 parts of DMF according to the mass fraction, mix them, and stir at 50 to 70°C for 2 to 6 hours to form a uniform cast film After vacuum degassing for 0.5-1.5 ...

Embodiment 2

[0029] (1) with embodiment 1;

[0030] (2) with embodiment 1;

[0031] (3) with embodiment 1;

[0032] (4) with embodiment 1;

[0033] (5) Weigh 15-35 parts of polysulfone powder obtained in step (4), 2-5 parts of PEG, and 60-83 parts of DMF according to the mass fraction, mix them, and stir at 50-70°C for 2-6 hours to form a uniform casting film After vacuum degassing for 0.5-1.5 hours, pour the casting solution onto a dry and clean glass plate, scrape the film with a scraper, and place it in a pure water coagulation bath to obtain the dopamine-modified polysulfone membrane.

Embodiment 3

[0035] (1) with embodiment 1;

[0036] (2) with embodiment 1;

[0037] (3) with embodiment 1;

[0038] (4) with embodiment 1;

[0039] (5) Weigh 15 to 35 parts of polysulfone powder obtained in step (4), 2 to 5 parts of F127, and 60 to 83 parts of DMF according to the mass fraction, mix them, and stir at 50 to 70°C for 2 to 6 hours to form a uniform casting film After vacuum degassing for 0.5-1.5 hours, pour the casting solution onto a dry and clean glass plate, scrape the film with a scraper, and place it in a pure water coagulation bath to obtain the dopamine-modified polysulfone membrane.

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Abstract

The invention discloses modified polysulfone powder based on dopamine and a preparation method of a dopamine-modified polysulfone membrane. The preparation method of the dopamine-modified polysulfone powder comprises the steps that 1, autopolymerization of dopamine on the surface of polysulfone powder is conducted, and a generated polydopamine functional layer is adhered to the surface of the polysulfone powder; 2, the dopamine-modified polysulfone powder is prepared into the membrane through a solution phase-inversion membrane-forming method. The preparation method has the advantages that dopamine is adopted to modify membrane-forming material polysulfone, and then membrane forming is conducted so that the membrane structure can be flexibly and conveniently regulated and controlled according to the use demand; the prepared polysulfone membrane has the good hydrophilic property and anti-fouling performance and can be further subjected to functional modification; the membrane material is not damaged during modification, the physical and chemical properties of an original membrane are not sacrificed, the method is simple, the effect is good, energy conservation and environment friendliness are achieved, and the method is suitable for industrial production and application.

Description

technical field [0001] The invention relates to a dopamine-modified polysulfone membrane and a preparation method thereof. Specifically, the polysulfone membrane-forming material is modified by dopamine (PDA), and then prepared into a membrane, which belongs to the field of environmental materials. Background technique [0002] Membrane separation can be operated under mild conditions without phase transition, and is one of the important technologies in the chemical industry. The core of membrane separation is the membrane, and the structure and physicochemical properties of the membrane material are crucial to the separation performance. Commonly used membrane materials are polyvinylidene fluoride, polysulfone, polyethersulfone, polyacrylonitrile, etc. These materials have excellent anti-ultraviolet and aging resistance, and good chemical stability. They are not corroded by acids and alkalis at room temperature, and they also have good thermal stability and mechanical stre...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00B01D69/02
CPCB01D71/68B01D67/0011B01D69/02B01D2325/36
Inventor 武承林杨健国应安国王庆丰
Owner TAIZHOU UNIV
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