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

A nanofiltration membrane and polyarylene ether technology, which is applied in the field of polyarylene ether ultrafiltration membranes containing tertiary amine structure, can solve the problem of hydrophobicity, poor organic solvent corrosion resistance, hydrophobicity, solvent corrosion resistance, poor temperature resistance, and organic solvent resistance. Corrosion is not ideal, etc.

Active Publication Date: 2021-03-19
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, nanofiltration membrane and method for preparation and reversible conversion of ultrafiltration and nanofiltration
  • Polyarylether ultrafiltration membrane, nanofiltration membrane and method for preparation and reversible conversion of ultrafiltration and nanofiltration
  • Polyarylether ultrafiltration membrane, nanofiltration membrane and method for preparation and reversible conversion of ultrafiltration and nanofiltration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0058] Sodium hydrosulfide 117.1g (equivalent to pure sodium hydrosulfide 56g), N,N'-bis(p-fluorobenzoyl-3-aminopropyl)methanamine 19.45g, 4,4'-dichlorodiphenyl sulfone 272.7g, lithium hydroxide 10g, potassium glycocholate 2g, N-methylpyrrolidone 1500ml, put into the reaction kettle, under the protection of nitrogen, dehydration reaction at 185°C for 2h, then keep at 200°C for 6h, the above polymerization Cool the temperature of the polymer solution to 60°C, pour it into water while stirring, and obtain the crude polymer product in the form of strands;

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

[0060] Crushing the crude product of tertiary amine polyarylether resin obtained in step (1), washing the crushed crude product with water and ethanol three times, filtering, recycling the filtrate, and drying the collected filter cake at a temperature of 120°C for 8 hours , to ...

Embodiment 2

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

[0071] Sodium sulfide 168.8g (equivalent to pure sodium sulfide 78g), N,N'-bis(p-fluorobenzoyl-3-aminopropyl)methanamine 29.2g, 4,4'-difluorobenzophenone 201.7 g, sodium carbonate 1g, zinc alginate 20g, N-cyclohexylpyrrolidone 1000ml, add to the reaction kettle, under the protection of nitrogen, dehydrate at 195°C for 1h, then keep at 210°C for 8h, cool down the above polymer solution to 70°C, and poured into water while stirring to obtain the crude product of linear polymer;

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

[0073] Crushing the crude product of tertiary amine polyarylether resin obtained in step (1), washing the crushed crude product with water and ethanol four times, filtering, recycling the filtrate, and drying the collected filter cake at a temperature of 110°C for 10 hours , to obtain purified tertiary amine-containing polyarylether resin, its IR and NMR ...

Embodiment 3

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

[0084] 250g of 4,4'-dimercaptodiphenylsulfide, 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, add to the reaction kettle, under the protection of nitrogen, dehydration reaction at a temperature of 190 ° C for 1.5 h, and then at a temperature of 220 ° C Keep for 6 hours, cool down the above polymer solution to 90°C, pour it into water while stirring, and obtain the crude polymer product in the form of strands;

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

[0086] Crushing the crude product of tertiary amine polyarylether resin obtained in step (1), washing the crushed crude product with water and ethanol for 5 times, filtering, recycling the filtrate, and drying the collected filter cake at a temperature of 100°C for 24 hours , to obtain pur...

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PUM

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Abstract

The invention relates to a polyarylene sulfide ultrafiltration membrane containing a tertiary amine structure, a polyarylene sulfide nanofiltration membrane containing a tertiary amine structure and a preparation method thereof, belonging to the field of polymer materials. The invention provides a polyarylene sulfide separation membrane. The polyarylene sulfide separation membrane is a tertiary amine-containing polyarylene sulfide ultrafiltration membrane prepared from a tertiary amine-containing polyarylene sulfide resin. The invention provides a novel ultrafiltration separation membrane. The obtained ultrafiltration membrane can be transformed into a nanofiltration membrane through acidification treatment; the obtained nanofiltration membrane can be restored to an ultrafiltration membrane through deacidification treatment, thereby realizing ultrafiltration-nanofiltration Filter reversible conversion.

Description

technical field [0001] The invention relates to a polyarylether ultrafiltration membrane containing a tertiary amine structure, a polyarylether 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 a very important research significance in material separation due to its advantages of low cost, low energy consumption, high efficiency, no pollution and recyclable useful substances. At present, it has been widely used in food, medicine, biology, energy, water treatment, bionics and other fields, which has had a huge impact on human production and life, and has become one of the most important methods in today's separation science. 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 membran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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