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Amphiphilic fluorine-containing gradient copolymer, and preparation method and application thereof

A gradient copolymer and amphiphilic technology, applied in chemical instruments and methods, membrane technology, semipermeable membrane separation, etc., can solve the problems of increased membrane adhesion and difficulty in cleaning, to eliminate attenuation, improve resistance Pollution performance and total flux decay rate decrease

Active Publication Date: 2015-09-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will increase the adhesion of the membrane fouled by organic substances such as oil, making it difficult to clean

Method used

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  • Amphiphilic fluorine-containing gradient copolymer, and preparation method and application thereof
  • Amphiphilic fluorine-containing gradient copolymer, and preparation method and application thereof
  • Amphiphilic fluorine-containing gradient copolymer, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1: This example prepares amphiphilic fluorine-containing gradient copolymer

[0030] Add 14.46g polyethylene glycol methacrylate, 0.422g RAFT reagent CPDB, 0.096g initiator AIBN and 33.72g butyl acetate into a 100mL three-necked flask (A), the three-necked flask is equipped with mechanical stirring and reflux condenser . Before the reaction started, the inside of the flask was replaced with nitrogen for 30 minutes to remove the oxygen inside, and then the flask was placed in an oil bath at 75°C. 9.71g fluorine-containing monomer perfluorohexyl ethyl acrylate C 6 A and 22.64 g of butyl acetate were placed in another flask, and the oxygen in the solution system was replaced by three freeze-wash-thaw cycles. Then it was placed in the syringe pump (B), and was added dropwise to the three-necked flask A at a constant rate (the dropping time was 4h), the whole reaction was carried out under the atmosphere of nitrogen protection, and the reaction was continued for 12...

Embodiment 2

[0032] Embodiment 2: This embodiment prepares amphiphilic fluorine-containing gradient copolymer

[0033] Add 14.46g polyethylene glycol acrylate, 0.422g RAFT reagent CPDB, 0.096g initiator AIBN and 33.72g butyl acetate into a 100mL three-necked flask (A). The three-necked flask is equipped with mechanical stirring and a reflux condenser. Before the reaction started, the inside of the flask was replaced with nitrogen for 30 minutes to remove the oxygen inside, and then the flask was placed in an oil bath at 75°C. Put 9.71g of perfluorohexylethyl methacrylate and 22.64g of butyl acetate in another flask, and replace the oxygen in the solution system through three freeze-wash-thaw cycles. Then it was placed in the syringe pump (B), and was added dropwise to the three-necked flask A at a constant rate (the dropping time was 6h), the whole reaction was carried out under the atmosphere of nitrogen protection, and the reaction was continued for 18h after the dropwise addition The r...

Embodiment 3

[0034] Embodiment 3: This embodiment prepares amphiphilic fluorine-containing gradient copolymer

[0035] Add 14.46g polyethylene glycol acrylate, 0.422g RAFT reagent CPDB, 0.096g initiator AIBN and 33.72g butyl acetate into a 100mL three-necked flask (A). The three-necked flask is equipped with mechanical stirring and a reflux condenser. Before the reaction started, the inside of the flask was replaced with nitrogen for 30 minutes to remove the oxygen inside, and then the flask was placed in an oil bath at 75°C. Put 9.71g of (N-methylperfluorohexanesulfonamido)ethyl methacrylate and 22.64g of butyl acetate in another flask, and replace the oxygen in the solution system by three freeze-wash-thaw cycles . Then it was placed in the syringe pump (B), and was added dropwise to the three-necked flask A at a constant rate (the dropping time was 5h), the whole reaction was carried out under the atmosphere of nitrogen protection, and the reaction was continued for 15h after the dropw...

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Abstract

The invention discloses a preparation method of an amphiphilic fluorine-containing gradient copolymer, and the method is used in oil-water separation ultrafiltration membrane antifouling modification. First, with a reversible addition fragmentation chain transfer (RAFT) controlled free radical polymerization method, with a semi-continuous feeding manner, an amphiphilic fluorine-containing gradient copolymer is prepared; the prepared amphiphilic fluorine-containing gradient copolymer is adopted as a modifying agent, and is used for modifying the ultrafiltration membrane with a blending modification method, wherein the membrane is prepared with a classic non-solvent induced phase transformation method. The surface of the membrane modified with the amphiphilic fluorine-containing gradient copolymer has an amphiphilic hierarchical structure with the coexistence of hydrophilic and hydrophobic regions. The amphiphilic fluorine-containing gradient copolymer preparation method is simple; and the modified membrane preparation process has the advantages of easy operation and mild conditions. The modified membrane has good oil-water separation performance and excellent antifouling effect, and can be used in water treatment and especially the separation purification of oil-containing wastewater.

Description

technical field [0001] The invention relates to the preparation of an amphiphilic fluorine-containing gradient copolymer and the application of the modified oil-water separation ultrafiltration membrane, which belongs to the ultrafiltration membrane preparation technology. Background technique [0002] With the development of industry and society, various oil-related industries (petrochemical industry, metallurgy, pharmaceutical and food industry) or municipal wastewater produce a large amount of oily wastewater, and the separation and treatment of oily wastewater has become a worldwide challenge. Oily wastewater has a large output and low surface tension, and it is easy to adhere to and cause pollution on almost all natural environments or engineering system surfaces that come into contact with it. In addition, if the oil in oily wastewater is discharged, it will have a serious impact on the water environment and organisms. Therefore, the treatment of oily wastewater has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00B01D71/80B01D71/68B01D71/34B01D67/00B01D69/02C02F1/44
Inventor 张庆华张广法任超时詹晓力陈丰秋
Owner ZHEJIANG UNIV
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