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Polyarylether ultrafiltration membrane, polyarylether nanofiltration membrane, preparation method of polyarylether ultrafiltration membrane and polyarylether nanofiltration membrane, and reversible conversion method of ultrafiltration and nanofiltration

A technology of polyarylether and ultrafiltration membrane, which is applied in the direction of chemical instruments and methods, ultrafiltration, membrane, etc., and can solve the problem of hydrophobicity, poor resistance to organic solvent corrosion, hydrophobicity, solvent corrosion resistance, poor temperature resistance, and resistance to organic solvents Problems such as unsatisfactory corrosion

Active Publication Date: 2020-08-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main polymer materials widely used in the preparation of separation membranes are fluorine-containing resins such as polyvinylidene fluoride (PVDF), which have good film-forming properties and are generally used to prepare ultrafiltration and microfiltration membranes, but are hydrophobic and resistant to organic solvents. Corrosion is poor; sulfone-based resins such as polysulfone (PSU), polyethersulfone (PES), etc., have good temperature resistance and film-forming properties, and are generally used for ultrafiltration and nanofiltration membranes, but they are resistant to organic solvents. Not ideal; polyvinyl chloride (PVC) has low cost and general porosity, but its hydrophobicity, solvent resistance, and temperature resistance are poor; polyamide (PA) and polyimide (PI) have poor composition The porosity is poor, and it is generally used for nanofiltration and reverse osmosis membranes, and its acid and alkali corrosion resistance is poor; polypropylene (PP) is more environmentally friendly by thermoforming, and is suitable for microfiltration membranes, but its hydrophobicity and solvent resistance and poor heat resistance

Method used

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  • Polyarylether ultrafiltration membrane, polyarylether nanofiltration membrane, preparation method of polyarylether ultrafiltration membrane and polyarylether nanofiltration membrane, and reversible conversion method of ultrafiltration and nanofiltration
  • Polyarylether ultrafiltration membrane, polyarylether nanofiltration membrane, preparation method of polyarylether ultrafiltration membrane and polyarylether nanofiltration membrane, and reversible conversion method of ultrafiltration and nanofiltration
  • Polyarylether ultrafiltration membrane, polyarylether nanofiltration membrane, preparation method of polyarylether ultrafiltration membrane and polyarylether nanofiltration membrane, and reversible conversion method of ultrafiltration and nanofiltration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Preparation of tertiary amine-containing polyarylene ether resin

[0058] Sodium hydrosulfide 117.1g (equivalent to pure sodium hydrosulfide 56g), N,N'-bis(p-fluorobenzoyl-3-aminopropyl) methylamine 19.45g, 4,4'-dichlorodiphenylsulfone 272.7g, 10g lithium hydroxide, 2g potassium glycocholate, and 1500ml N-methylpyrrolidone were added to the reaction kettle. Under nitrogen protection, the dehydration reaction was carried out at a temperature of 185 °C for 2 hours, and then kept at a temperature of 200 °C for 6 hours to polymerize the above The polymer solution was cooled to 60 °C, and poured into water while stirring to obtain a linear polymer crude product;

[0059] (2) Purification of tertiary amine-containing polyarylene ether resin

[0060] The crude product of tertiary amine polyarylene ether resin obtained in step (1) is crushed, and the crushed crude product is washed with water and ethanol for 3 times, filtered, and the filtrate is recycled and used, and the...

Embodiment 2

[0070] (1) Preparation of tertiary amine-containing polyarylene ether resin

[0071] 168.8g of sodium sulfide (equivalent to 78g of pure sodium sulfide), 29.2g of N,N'-bis(p-fluorobenzoyl-3-aminopropyl) methylamine, 201.7g of 4,4'-difluorobenzophenone g, 1 g of sodium carbonate, 20 g of zinc alginate, and 1000 ml of N-cyclohexylpyrrolidone were added to the reaction kettle. Under nitrogen protection, the dehydration reaction was carried out at a temperature of 195 °C for 1 hour, and then kept at a temperature of 210 °C for 8 hours to cool the above polymer solution. to 70°C, pour into water while stirring to obtain a linear polymer crude product;

[0072] (2) Purification of tertiary amine-containing polyarylene ether resin

[0073] The crude product of tertiary amine polyarylene ether resin obtained in step (1) is crushed, and the crushed crude product is washed with water and ethanol for 4 times, filtered, and the filtrate is recycled and used, and the collected filter cake...

Embodiment 3

[0083] (1) Preparation of tertiary amine-containing polyarylene ether resin

[0084] 250g of 4,4'-dimercaptodiphenyl sulfide, 38.9g of N,N'-bis(p-fluorobenzoyl-3-aminopropyl)methanamine, N,N'-bis(p-fluorobenzene) Formyl) m-phenylenediamine 316.8g, barium hydroxide 30g, zinc oxalate 30g, isoquinoline 3000ml, added to the reaction kettle, under nitrogen protection, dehydration reaction at 190 ℃ for 1.5h, and then at 220 ℃ Keep for 6h, cool the above polymer solution to 90°C, pour it into water while stirring, and obtain a linear polymer crude product;

[0085] (2) Purification of tertiary amine-containing polyarylene ether resin

[0086] The crude product of tertiary amine polyarylene ether resin obtained in step (1) is crushed, and the crushed crude product is washed with water and ethanol for 5 times, filtered, and the filtrate is recycled and used, and the collected filter cake is dried at a temperature of 100 ° C for 24 hours , to obtain purified tertiary amine-containing ...

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Abstract

The invention relates to a tertiary amine structure-containing polyarylene sulfide ultrafiltration membrane, a tertiary amine structure-containing polyarylene sulfide nanofiltration membrane and a preparation method thereof, and belongs to the field of high polymer materials. The invention provides a polyarylene sulfide separation membrane. The polyarylene sulfide separation membrane is a tertiaryamine-containing polyarylene sulfide ultrafiltration membrane prepared from tertiary amine-containing polyarylene sulfide resin. The invention provides a novel ultrafiltration separation membrane. The obtained ultrafiltration membrane can be converted into a nanofiltration membrane through acidification treatment, and the obtained nanofiltration membrane can be recovered into an ultrafiltration membrane through deacidification treatment, so that reversible conversion of ultrafiltration-nanofiltration is realized.

Description

technical field [0001] The invention relates to a polyarylene ether ultrafiltration membrane containing a tertiary amine structure, a polyarylene ether nanofiltration membrane containing a tertiary amine structure and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] As a new type of separation technology, membrane separation has great research significance in material separation due to its advantages of low cost, low energy consumption, high efficiency, no pollution and the recovery of useful substances. At present, it has been widely used in food, medicine, biology, energy, water treatment, bionics and other fields, and has had a huge impact on human production and life, and has become one of the most important means in separation science today. As we all know, the separation membrane is the core of the membrane separation process, and the membrane material is the basis for the development of the separation membrane. ...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D69/02B01D67/00B01D61/14B01D61/00
CPCB01D61/027B01D61/145B01D67/0081B01D67/0093B01D69/02B01D71/82B01D2325/24
Inventor 张刚陆浩然杨杰袁书珊王晗黄骁毛其泽连英甫严永刚
Owner SICHUAN UNIV
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