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Carboxyl-side-group-containing polyarylether copolymers and preparation method thereof, and application of copolymers in aspect of ultrafiltration membrane hydrophilic modification

A kind of technology like copolymer and polyarylene ether, which is applied in the field of ultrafiltration membrane preparation, can solve the problems of easy pollution of hydrophobicity, and achieve the effects of enhanced hydrophilicity, cheap raw materials and simple operation.

Active Publication Date: 2016-10-12
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a carboxyl side group-containing polyarylether copolymer for the hydrophilic modification of ultrafiltration membranes, aiming at the problems of hydrophobicity and easy pollution in the application of separation membranes prepared by existing membrane materials. substance, preparation method

Method used

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  • Carboxyl-side-group-containing polyarylether copolymers and preparation method thereof, and application of copolymers in aspect of ultrafiltration membrane hydrophilic modification
  • Carboxyl-side-group-containing polyarylether copolymers and preparation method thereof, and application of copolymers in aspect of ultrafiltration membrane hydrophilic modification
  • Carboxyl-side-group-containing polyarylether copolymers and preparation method thereof, and application of copolymers in aspect of ultrafiltration membrane hydrophilic modification

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1: This embodiment is a blank pure PSF homopolymer.

[0039] Add 150mmol 4,4-bis(4-hydroxyphenyl)propane (bisphenol A, BPA), 150mmol 4,4′-bis Chlorodiphenyl sulfone (DDS) and 300mmol anhydrous potassium carbonate, 200.3946g dimethyl sulfoxide (DMSO) as the reaction solvent (solid content: 25%), 50mL toluene as the water carrier. Under the protection of nitrogen, slowly heat the reaction system to 150°C, keep the reflux state, use toluene to take out the water generated in the reaction in the form of azeotropy, distill off the excess toluene after 3 hours, and then slowly raise the temperature to 160°C React and polymerize for 3 hours to obtain a polymer solution with high viscosity. Discharge the polymer solution into deionized water, and then pulverize it with a pulverizer, and wash it with boiling water several times to remove residual solvents and inorganic salts. Boil and wash with ethanol four times to remove unreacted monomers, and dry in a vacuum oven...

Embodiment 2

[0040] Embodiment 2: This embodiment prepares polysulfone copolymer containing carboxyl side group

[0041] Add 30mmol 4,4′-dihydroxytriphenylmethane-2-carboxylic acid (phenolphthalein, PPL), 120mmol 4,4- Bis(4-hydroxyphenyl)propane (bisphenol A, BPA), 150mmol 4,4'-dichlorodiphenyl sulfone (DDS) and 300mmol anhydrous potassium carbonate, with 207.3870g dimethyl sulfoxide (DMSO) as Reaction solvent (solid content is 25%), 50mL toluene is used as water-carrying agent. Under the protection of nitrogen, slowly heat the reaction system to 150°C, keep the reflux state, use toluene to take out the water generated in the reaction in the form of azeotropy, distill off the excess toluene after 3 hours, and then slowly raise the temperature to 160°C React and polymerize for 3 hours to obtain a polymer solution with a higher viscosity, which is discharged in deionized water. After being pulverized by a pulverizer, deionized water is boiled and washed several times to remove residual solv...

Embodiment 3

[0042] Example 3: This example prepares a polysulfone copolymer containing carboxyl side groups.

[0043] Add 60mmol 4,4′-dihydroxytriphenylmethane-2-carboxylic acid (phenolphthalein, PPL), 90mmol 4,4- Bis(4-hydroxyphenyl)propane (bisphenol A, BPA), 150mmol 4,4'-dichlorodiphenyl sulfone (DDS) and 300mmol anhydrous potassium carbonate, with 215.6715g dimethyl sulfoxide (DMSO) as Reaction solvent (solid content is 25%), 50mL toluene is used as water-carrying agent. Under the protection of nitrogen, slowly heat the reaction system to 150°C, keep the reflux state, use toluene to take out the water generated in the reaction in the form of azeotropy, distill off the excess toluene after 4 hours, and then slowly raise the temperature to 160°C React and polymerize for 4 hours to obtain a polymer solution with high viscosity, which is discharged into deionized water. After being pulverized by a pulverizer, deionized water is boiled and washed several times to remove residual solvents ...

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Abstract

The invention relates to carboxyl-side-group-containing polyarylether copolymers and a preparation method thereof, and application of the copolymers in the aspect of ultrafiltration membrane hydrophilic modification, belonging to the technical field of ultrafiltration membrane preparation. By adopting nucleophilic polycondensation and one-step feeding, the mole ratio of the phenolphthalin bisphenol monomer to the total bisphenol monomer is changed to prepare a series of polyarylether copolymers with different carboxylation degrees; and the polyarylether copolymers are used as the membrane material preparation membrane casting solution to prepare a series of ultrafiltration membranes by an impregnation precipitated-phase conversion process. The hydrophilicity and water flux of the carboxyl-side-group-containing modified polyarylether ultrafiltration membranes are obviously enhanced. The modified monomer phenolphthalin can be obtained only by hydrolyzing / reducing phenolphthalein, so the experimental operation is simple, and the raw material price is low. In addition, the technique has the advantages of enduring chemical hydrophilic modification, high repetitiveness and the like, and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of ultrafiltration membrane preparation, and in particular relates to a polyarylether copolymer containing carboxyl side groups, a preparation method and its application in the aspect of hydrophilic modification of ultrafiltration membranes. Background technique [0002] In recent decades, ultrafiltration technology has been widely used in natural water treatment, urban sewage regeneration and other processes due to its advantages of low energy consumption, high efficiency, and no need for chemical pretreatment. However, there are still many challenges in the actual application process, the most prominent of which is membrane fouling. Membrane fouling refers to the adsorption and deposition of macromolecules such as colloids, particles, and solutes (pollutants, especially macromolecules such as proteins) in the liquid to be separated that are in contact with the membrane on the surface of the membrane and in...

Claims

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Application Information

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IPC IPC(8): C08G75/23C08G65/40B01D67/00B01D61/02
CPCB01D61/025B01D67/0093B01D2323/02B01D2325/36C08G65/4012C08G75/23C08G2650/40
Inventor 陈春海刘志晓赵晓刚米智明周宏伟王大明党国栋
Owner JILIN UNIV
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