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Sulfonated naphthalenone structure-containing copolyaryl ether sulfone composite nanofiltration membrane and preparation method thereof

A phthalazinone and composite nanofiltration membrane technology, applied in the field of membrane separation, can solve problems such as increased operating costs, poor chlorine resistance of polyamides, and difficult processing

Active Publication Date: 2015-12-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite nanofiltration membranes are mostly polyamide composite membranes prepared by interfacial polymerization of polyamines and polyacyl chlorides. Due to the poor chlorine resistance of polyamides, a reducing agent must be added to the raw water to remove free chlorine in the water to ensure membrane The performance does not deteriorate, which increases the operating cost and also brings certain difficulties to the subsequent treatment of water

Method used

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  • Sulfonated naphthalenone structure-containing copolyaryl ether sulfone composite nanofiltration membrane and preparation method thereof
  • Sulfonated naphthalenone structure-containing copolyaryl ether sulfone composite nanofiltration membrane and preparation method thereof
  • Sulfonated naphthalenone structure-containing copolyaryl ether sulfone composite nanofiltration membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Dissolve 1 g of SPPBES (degree of sulfonation: 0.9) after drying in a mixed solvent composed of 41.5 g of ethylene glycol methyl ether, ethanol and deionized water, and add 7.5 g of glycerol to prepare a dilute solution for dip coating. Fix the polyether sulfone ketone (PPESK) ultrafiltration membrane on a glass plate, and evenly coat the prepared SPPBES dipping solution on the surface of the ultrafiltration bottom membrane. After 5 minutes, drain the excess liquid, and then Heat treatment at 90°C for 30 minutes to obtain the SPPBES composite nanofiltration membrane. After soaking in water for 24 hours, after pre-pressing at 1.2MPa for 0.5 hours, the desalination rate and water flux were measured with 1000mg / L sodium sulfate aqueous solution at 1.0MPa, and the water flux of the SPPBES composite nanofiltration membrane was 44L / (m 2 h), the desalination rate reaches 83%.

Embodiment 2

[0025] Dissolve 1 g of SPPBES (degree of sulfonation: 0.9) after drying in a mixed solvent composed of 41.5 g of ethylene glycol methyl ether, acetone and deionized water, add 7.5 g of glycerol, and prepare a dilute solution for dip coating. Fix the polyether sulfone ketone (PPESK) ultrafiltration membrane on a glass plate, and evenly coat the prepared SPPBES dipping solution on the surface of the ultrafiltration bottom membrane. After 5 minutes, drain the excess liquid, and then Heat treatment at 90°C for 30 minutes to obtain the SPPBES composite nanofiltration membrane. After soaking in water for 24 hours, after pre-pressing at 1.2MPa for 0.5 hours, the desalination rate and water flux were measured with 1000mg / L sodium sulfate aqueous solution at 1.0MPa, and the water flux of the SPPBES composite nanofiltration membrane was 61L / (m 2 h), the desalination rate reaches 69%.

Embodiment 3

[0027] Dissolve 1 g of SPPHES (sulfonation degree 0.69) after drying in a mixed solvent composed of 27.2 g of ethylene glycol methyl ether, 6.8 g of ethanol and 2.5 g of dimethylacetamide, add 12.5 g of glycerol, and prepare a dip coating solution. solution. Fix the PPESK ultrafiltration membrane on a glass plate, and evenly coat the prepared SPPHES dipping solution on the surface of the ultrafiltration bottom membrane. After 5 minutes, drain the excess liquid and heat-treat at 90°C for 30 minutes to obtain a SPPHES composite Nanofiltration. After soaking in water for 24 hours, after pre-pressing at 1.2MPa for 0.5 hours, the desalination rate and water flux were measured with 1000mg / L sodium sulfate aqueous solution at 1.0MPa, and the water flux of the SPPHES composite nanofiltration membrane was 35L / (m 2 h), the desalination rate reaches 93%.

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Abstract

The invention discloses a novel sulfonated copolymerized arylene ether ketone compound nano filtration membrane containing Chinazolin ketone structure and a preparation method thereof. The sulfonated copolymerized arylene ether ketone containing Chinazolin ketone structure is a composite layer material and takes the mixture of the reagent of alcohol, ethers and ketone as solvent, polyalcohol, polyphenol, polyamine and the like as addition agent for preparing dip-coating solution. The dip-coating solution is coated on a hyperfiltration basement membrane by the dip-coating method and the hyperfiltration basement membrane is thermally treated at 30-150 DEG C to obtain the novel compound nano filtration membrane. As the molecular chain of the sulfonated copolymerized arylene ether ketone the containing Chinazolin ketone structure is provided with a whole aromatic ring distortion non-coplanar Chinazolin ketone biphenyl structure, thereby featuring higher glass flower transformation temperature, excellent chemical stability, very good antioxidant property and high temperature resistance. The molecular structure of the sulfonated copolymerized arylene ether ketone containing Chinazolin ketone structure is provided with the following constitutional repeating units: wherein R1, R2, R3 can be hydrogen atoms, halogen atoms, methyl or aryl group and X can be the following substances.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and relates to a high-performance nanofiltration membrane and its preparation technology, in particular to a sulfonated phthalazinone-containing copolymer polyaryl ether sulfone nanofiltration membrane and a preparation method thereof. Background technique [0002] Nanofiltration is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration. The pore size of the nanofiltration membrane is in the range of several nanometers, which is poor for the removal of monovalent ions and organic substances with a molecular weight below 200. It has a high removal rate for divalent or multivalent ions and organic substances with a molecular weight between 200 and 1000. Due to the characteristics of low operating pressure and energy saving, nanofiltration membranes have been widely used. Nanofiltration membranes are mainly used in (1) softening water treatment, such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D69/12B01D67/00
Inventor 蹇锡高张守海王锦艳刘程
Owner DALIAN UNIV OF TECH