A kind of sulfonated polyarylether sulfone nanofiltration membrane and preparation method thereof

A sulfonated polyaryl ether sulfone, nanofiltration membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, to achieve the effect of simple preparation method, excellent water flux and separation performance

Active Publication Date: 2021-12-14
NANJING QINGYAN POLYMER NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrophobicity of polyethersulfone itself limits its application, so it needs to be modified to improve hydrophilicity

Method used

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  • A kind of sulfonated polyarylether sulfone nanofiltration membrane and preparation method thereof
  • A kind of sulfonated polyarylether sulfone nanofiltration membrane and preparation method thereof
  • A kind of sulfonated polyarylether sulfone nanofiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: Synthesis of sulfonated polyarylethersulfone (IA)

[0039]

[0040] Step 1: Synthesis of 3,3'-(sulfonylbis(6-fluoro-3,1-phenylene))biquinoline (I-c)

[0041]

[0042] Dissolve 4,4'-sulfonylbis(2-bromo-1-fluorobenzene) (8.24g, 20mmol) in 100mL tetrahydrofuran, add 0.2g tetrakis(triphenylphosphine)palladium, add quinoline-3-boronic acid (7.26g, 42mmol), heated to reflux for 12 hours under nitrogen protection. After the reaction, cool to room temperature, add 100mL of water, continue to stir for 1 hour, and filter to obtain the crude product of 3,3'-(sulfonylbis(6-fluoro-3,1-phenylene))biquinoline. Recrystallized from toluene, the final product 3,3'-(sulfonylbis(6-fluoro-3,1-phenylene))diquinoline crude product was 8.63g, and the yield was 85%.

[0043] MS m / z: 509.2[M+H]+

[0044] Step 2: Synthesis of polyarylethersulfone (I-e)

[0045]

[0046] Add 3,3'-(sulfonylbis(6-fluoro-3,1-phenylene))biquinoline (5.08g, 10mmol), 4,4'-(1,3-dioxo Pentacycl...

Embodiment 2

[0050] Example 2: Preparation of sulfonated polyarylethersulfone nanofiltration membrane 1

[0051] Add sulfonated polyarylethersulfone (IA) (3g) into N-methylpyrrolidone (7g), heat to 60°C under stirring condition, sulfonated polyarylethersulfone (IA) is completely dissolved, continue stirring for 12 hours to obtain a uniform casting solution, and then stand at 60°C for 12 hours to defoam. Pour the defoamed casting solution onto a clean glass plate, and scrape it with a spatula to form a uniform nascent film of 100 μm. After the nascent film was volatilized for 60 seconds, it was removed from the glass plate and slowly placed in 40°C deionized water to solidify into a film. The above membrane was washed three times with deionized water to obtain a sulfonated polyarylethersulfone nanofiltration membrane 1 .

Embodiment 3

[0052] Example 3: Preparation of sulfonated polyarylethersulfone nanofiltration membrane 2

[0053] Add sulfonated polyarylethersulfone (IA) (2.8g) into N-methylpyrrolidone (7.2g), and heat to 60°C under stirring condition, the sulfonated polyarylethersulfone (IA) is completely dissolved, continue Stir for 12 hours to obtain a uniform casting solution, and then stand at 60° C. for 12 hours to defoam. Pour the defoamed casting solution onto a clean glass plate, and scrape it with a spatula to form a uniform nascent film of 100 μm. After the nascent film was volatilized for 60 seconds, it was removed from the glass plate and slowly placed in 40°C deionized water to solidify into a film. The above membrane was washed three times with deionized water to obtain the sulfonated polyarylethersulfone nanofiltration membrane 2 .

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Abstract

The invention provides a preparation method of a sulfonated polyaryl ether sulfone nanofiltration membrane, which belongs to the field of preparation of membrane separation materials.

Description

technical field [0001] The invention belongs to the field of membrane separation material preparation, and in particular relates to a sulfonated polyarylethersulfone nanofiltration membrane and a preparation method thereof. Background technique [0002] Polyarylethersulfone material is a special engineering plastic that combines the characteristics of easy molding and high impact strength. It has excellent dimensional stability, thermal stability, mechanical stability and good biocompatibility. With the advantages of low price and low price, it is widely used in the fields of medicine, transportation and electronic appliances. However, the hydrophobicity of polyethersulfone itself limits its application, so it needs to be modified to improve hydrophilicity. At present, the commonly used modification method is to introduce sulfonic acid groups through sulfonation. The modified sulfonated polyethersulfone material has good hydrophilicity, acid and alkali resistance and chlori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00B01D61/00
CPCB01D71/68B01D69/02B01D67/0009B01D61/027
Inventor 张东宝于冉张奇张建民
Owner NANJING QINGYAN POLYMER NEW MATERIAL CO LTD
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