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Preparation method and application of efficient hydrophilic modified anti-pollution polyether sulfone film

A polyethersulfone membrane and hydrophilization technology, which is applied in the field of membrane separation, can solve the problems of increased operating cost, decreased membrane separation efficiency, serious membrane fouling, etc., and achieves the effect of novel structure, improved hydrophilicity and anti-pollution performance.

Active Publication Date: 2017-08-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrophobic polyethersulfone (PES) is an ideal membrane material, but in practical applications, membrane fouling is serious, which reduces membrane separation efficiency and increases operating costs

Method used

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  • Preparation method and application of efficient hydrophilic modified anti-pollution polyether sulfone film
  • Preparation method and application of efficient hydrophilic modified anti-pollution polyether sulfone film
  • Preparation method and application of efficient hydrophilic modified anti-pollution polyether sulfone film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method and application of a high-efficiency hydrophilized modified anti-fouling polyethersulfone membrane, the operation steps are as follows:

[0029] (1) Synthesis of additive PAA-F127-PAA:

[0030] Add 0.5g of CPADB-F127-CPADB, 2.5mg of azobisisobutyronitrile, and 0.88g of acrylic acid into the reactor, dissolve them in 11.5g of N,N-dimethylformamide, and remove the Oxygen, protected by nitrogen, stirred and reacted at 50°C for 24 hours to prepare a hydrophilic block copolymer PAA-F127-PAA;

[0031] (2) Preparation of physically blended modified PES / PAA-F127-PAA film:

[0032] Polyethersulfone (PES) was used as the base film material, PAA-F127-PAA was used as the additive, and N,N-dimethylformamide was used as the solvent. The membrane liquid was stirred at 60°C for 2 hours, and then the film was scraped after standing still for defoaming for 12 hours. The coagulation bath was a 60°C water bath to obtain a blended modified PES / PAA-F127-PAA film.

[0...

Embodiment 2

[0040] A preparation method and application of a high-efficiency hydrophilized modified anti-fouling polyethersulfone membrane, the operation steps are as follows:

[0041] (1) Synthesis of additive PAA-F127-PAA:

[0042] Add 0.5g of CPADB-F127-CPADB, 1.9mg of azobisisobutyronitrile, and 2.2g of acrylic acid into the reactor, dissolve them in 19.16g of N,N-dimethylformamide, and remove the Oxygen, protected by nitrogen, stirred and reacted at 70 ° C for 12 hours to prepare a hydrophilic block copolymer PAA-F127-PAA;

[0043] (2) Preparation of physically blended modified PES / PAA-F127-PAA film:

[0044] Polyethersulfone (PES) was used as the base film material, PAA-F127-PAA was used as the additive, and N,N-dimethylacetamide was used as the solvent. The membrane solution was stirred at 20°C for 12 hours, left to defoam for 4 hours, and then scraped off. The coagulation bath was an ethanol bath at 20°C to obtain a blended modified PES / PAA-F127-PAA film.

[0045] (3) Strongly ...

Embodiment 3

[0052] A preparation method and application of a high-efficiency hydrophilized modified anti-fouling polyethersulfone membrane, the operation steps are as follows:

[0053] (1) Synthesis of additive PAA-F127-PAA:

[0054] Add 0.5g of CPADB-F127-CPADB, 2.5mg of azobisisobutyronitrile, and 0.8g of acrylic acid into the reactor, dissolve them in 13.49g of N,N-dimethylformamide, and remove the Oxygen, protected by nitrogen, stirred and reacted at 90°C for 4 hours to prepare a hydrophilic block copolymer PAA-F127-PAA;

[0055] (2) Preparation of physically blended modified PES / PAA-F127-PAA film:

[0056] Polyethersulfone (PES) was used as the base film material, PAA-F127-PAA was used as the additive, and dimethyl sulfoxide was used as the solvent. Stir for 7 hours at ℃, stand for 8 hours for defoaming, and then scrape the film. The coagulation bath is a mixed bath of water and ethanol with a volume ratio of 4:1 at 4 ℃ to obtain a blended modified PES / PAA-F127-PAA film.

[0057] ...

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Abstract

The invention relates to a preparation method and an application of an efficient hydrophilic modified anti-pollution polyether sulfone film. The preparation method comprises physical blending hydrophilic modification and chemical grafting hydrophilic modification of a pure polyether sulfone film: synthesizing a hydrophilic block polymer by virtue of a surface initiated reversible addition fragmentation chain transfer method (RAFT), and physically blending the hydrophilic block polymer with polyether sulfone, so as to prepare a PES / PAA-F127-PAA film; and synthesizing a high hydrophilic substance NH2-PDMAPS by virtue of an activator regenerated by electron transfer-atom transfer radical polymerization method (ARGET ATRP), and preparing the efficient hydrophilic modified anti-pollution polyether sulfone film by virtue of a chemical grafting method based on blending modification. The preparation method has the beneficial effects that molecules are designed by virtue of two efficient and environment-friendly RAFT and ARGET ATRP polymerization methods, the structure is novel, reaction conditions are mild, and a hydrophilic modification method has a relatively obvious effect and further has wide application prospects in oil-water separation field.

Description

technical field [0001] The invention relates to a preparation method and application of a high-efficiency hydrophilized modified anti-pollution polyethersulfone membrane, belonging to the technical field of membrane separation. Background technique [0002] At present, the domestic industry is developing rapidly, and the water environment protection situation is extremely severe. Oily sewage such as industrial wastewater and domestic water must be treated scientifically. Oily sewage refers to sewage containing fat (fatty acid, soap dung, fat, wax, etc.) and various oils (mineral oil, animal and vegetable oil), which is characterized by chemical oxygen demand (COD), biological oxygen demand (BOD) High, with a certain smell and color, flammable, easy to oxidize and decompose, generally lighter than water, insoluble in water. Oily sewage has a wide range, large volume and serious hazards. Oily sewage will be produced in petroleum, shipping, machinery and other fields, which is...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D71/68B01D69/02B01D67/00
Inventor 周建成李璟殷俊李乃旭刘明杨斌
Owner SOUTHEAST UNIV
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