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Preparation method of ultraviolet-crosslinkable sulfonated polyethersulfone ketone water treatment membrane material

A technology for sulfonated poly(phenylene ether sulfone ketone) and water treatment membranes, which is applied in chemical instruments and methods, membranes, membrane technologies, etc., and can solve the problems of decreased dimensional stability, ineffective membrane separation, and decreased membrane mechanical properties and modulus. , to achieve the effect of improving mechanical strength and performance, shortening process cycle and reducing excess

Inactive Publication Date: 2018-06-01
钟卓尔 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the sulfonated poly(phenylene ether sulfone) after the introduction of sulfonic acid groups, under the pressure working conditions used as water treatment membranes, is prone to swelling due to hydrophilicity, which reduces the dimensional stability, and the mechanical properties and modulus of the membrane are also corresponding Reduced, the probability of membrane defects increases, resulting in ineffective membrane separation

Method used

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  • Preparation method of ultraviolet-crosslinkable sulfonated polyethersulfone ketone water treatment membrane material
  • Preparation method of ultraviolet-crosslinkable sulfonated polyethersulfone ketone water treatment membrane material
  • Preparation method of ultraviolet-crosslinkable sulfonated polyethersulfone ketone water treatment membrane material

Examples

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Embodiment 1

[0039] Example 1: Preparation of UV-crosslinked poly(phenylene ether sulfone ketone) flat membrane material with 20% sulfonation degree

[0040] In a dry ten-liter reactor with mechanical stirring and nitrogen protection, 260.7 grams of raw materials 4,4'-biphenol, 3,5,3',5'-tetramethyl-4,4'- Dihydroxybiphenyl 145.4g, 4,4'-Difluorobenzophenone 130.9g, 4,4'-Dichlorodiphenylsulfone 287.2g, 4,4'-Dichlorodiphenylsulfone-3,3'- 196.5 grams of disodium disulfonate, 304 grams of dry potassium carbonate sieved through a 270-mesh sieve, and 4000 milliliters of solvent N-methyl-2-pyrrolidone (NMP). Under the protection of nitrogen bubbling, mechanical stirring was performed to 140 rpm, and the temperature of the oil bath was gradually raised to 100 degrees Celsius. When the temperature in the reactor rises to about 75 degrees Celsius, the rapidly formed phenoxide is precipitated due to low solubility. Reduce the stirring speed to 80 rpm, and continue to raise the temperature of the oil...

Embodiment 2

[0041] Example 2: Preparation of 5% sulfonation degree ultraviolet crosslinked poly(phenylene ether sulfone ketone) hollow fiber ultrafiltration membrane material

[0042]In a dry ten-liter reactor with mechanical stirring and nitrogen protection, 351.6 grams of raw materials 2,2-bis(4'-hydroxyphenyl)propane (bisphenol A), 2,3,5-trimethyl 100.5 grams of p-benzoquinone, 144.0 grams of 4,4'-difluorobenzophenone, 410.6 grams of 4,4'-dichlorodiphenylsulfone, 4,4'-dichlorodiphenylsulfone-3,3'- 54.0 grams of disodium disulfonate, 334 grams of dry potassium carbonate sieved through a 270-mesh sieve, and 4000 milliliters of solvent N-methyl-2-pyrrolidone (NMP). Under the protection of nitrogen bubbling, mechanical stirring was performed to 140 rpm, and the temperature of the oil bath was gradually raised to 100 degrees Celsius. When the temperature in the reactor rises to about 78 degrees Celsius, the rapidly formed phenoxide is precipitated due to low solubility. Reduce the stirrin...

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Abstract

The invention discloses a preparation method of an ultraviolet-crosslinkable sulfonated polyethersulfone ketone water treatment membrane material. The method comprises steps as follows: monomers containing sulfonic acid groups and ultraviolet-crosslinkable monomers are introduced and subjected to one-step copolymerization, and a sulfonated polyethersulfone ketone polymer is obtained; a polymer solution obtained after pressure filtering is directly mixed with an auxiliary to form a membrane casting solution without precipitation and drying for membrane preparation; the prepared membrane is subjected to ultraviolet irradiation, chemical crosslinking points are produced, a three-dimensional net-shaped structure support is formed, mechanical strength of the membrane is improved, and the service life of the membrane is prolonged. According to the technical scheme, the method has the advantages that synthesizing and crosslinking technologies are simple, degree of sulfonation and degree of crosslinking are controllable, enlarged production is convenient and the like, the service life of the membrane can be prolonged effectively, and membrane use cost is reduced greatly.

Description

technical field [0001] The invention relates to a preparation and production technology of a novel water treatment polymer material membrane, in particular to a preparation method of an ultraviolet light cross-linkable sulfonated poly(phenylene ether sulfone ketone) membrane material, belonging to the fields of water treatment and environmental protection. Background technique [0002] As a kind of polymer material with high glass transition temperature, polyphenylene ether sulfone has excellent chemical stability, chlorine resistance, and good mechanical processing performance. Unmodified and modified poly(phenylene ether sulfone) can be used as microporous ultrafiltration membrane material. However, the strong hydrophobicity of poly(phenylene ether sulfone) makes its membrane resistance higher and water flux lower when used in ultrafiltration membranes. At the same time, the highly hydrophobic membrane surface is also easy to adsorb organic impurities, which not only caus...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D69/06B01D69/08B01D71/68C08G75/23
CPCB01D67/0002B01D67/0006B01D69/02B01D69/06B01D69/08B01D71/68B01D2323/30C08G75/23
Inventor 钟卓尔钟禺
Owner 钟卓尔