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Polyether sulfone copolymer modified by sulphobetaine metacrylic acid ester as well as preparation method and application of polyether sulfone copolymer

A technology of alkali methacrylate and chloromethyl polyether sulfone is applied in the field of preparation of anti-fouling membranes, which can solve the problems of difficult modification reaction and the preparation of SBMA modified polyether sulfone, and achieve excellent anti-protein and The effect of platelets

Inactive Publication Date: 2013-07-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there have been reports of SBMA modified polyvinylidene fluoride, polypropylene and regenerated cellulose membrane materials, but because the chemical structure of polyethersulfone is relatively stable, it is difficult to undergo modification reactions, and there is no chemical method to prepare SBMA modified materials. reports on polyethersulfone

Method used

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  • Polyether sulfone copolymer modified by sulphobetaine metacrylic acid ester as well as preparation method and application of polyether sulfone copolymer
  • Polyether sulfone copolymer modified by sulphobetaine metacrylic acid ester as well as preparation method and application of polyether sulfone copolymer
  • Polyether sulfone copolymer modified by sulphobetaine metacrylic acid ester as well as preparation method and application of polyether sulfone copolymer

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Effect test

Embodiment 1

[0047]Add 0.36g CMPES to 10ml DMSO, stir and dissolve for 12 hours, add 1.8g SBMA, stir and dissolve for 2 hours, blow nitrogen for 5 hours to remove oxygen, add 18mg CuCl and 72mg BPy, react at 70°C for 5 hours, stop nitrogen flow to terminate reaction to obtain a DMSO solution containing the SBMA-g-PES product. The elemental analysis and detection of SBMA-g-PES showed that the nitrogen content was 3.26%, and the converted grafting rate was 83%.

Embodiment 2

[0049] Dissolve 3.6 g of SBMA-PSU (83% grafting rate) and 3.6 g of PES in 40 mL of NMP, stir for 12 hours, and remove air bubbles. Scrape the film on the glass plate with a spatula, and immerse it in the coagulation bath of NMP:pure water=6:4 to obtain the SBMA-modified PES flat film. The resulting flat membrane thickness is about 70 μm, the average membrane pore size is 3.82 μm, and the albumin rejection rate is 5%. Its structure is as figure 1 shown.

Embodiment 3

[0051] Dissolve 0.36 g of SBMA-PSU (grafting rate of 158%) and 3.6 g of PES in 20 mL of NMP, stir for 12 hours, and remove air bubbles. The film was scraped off on a glass plate with a spatula, and immersed in a pure water coagulation bath to obtain a SBMA-modified PES flat film. The resulting flat membrane thickness is about 50 μm, the average membrane pore size is 0.27 μm, and the albumin rejection rate is 95%.

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Abstract

The invention discloses a polyether sulfone copolymer modified by sulphobetaine metacrylic acid ester as well as a preparation method and an application of the polyether sulfone copolymer. The polyether sulfone copolymer disclosed by the invention is prepared by taking sulphobetaine metacrylic acid ester and polyether sulfone as raw materials, taking dimethylsulfoxide as a solvent and carrying out free radical polymerization under the action of a catalyst. The polyether sulfone copolymer disclosed by the invention is white solid at normal temperature, is soluble in dimethylsulfoxide and N-methylpyrrolidone and is insoluble in water, methyl alcohol and alcohol. Flat sheet membranes and hollow fiber membranes prepared by the polyether sulfone copolymer disclosed by the invention are excellent in capability of resisting pollutants such as protein and thrombocyte, so that the flat sheet membranes and the hollow fiber membranes can be used as materials directly contacted to the blood, cytoskeletons, separated organism fermentation liquid or water treatment materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of antifouling membranes, and in particular relates to a polyethersulfone (PES) copolymer modified by sulfobetaine methacrylate (SBMA) and its preparation method and application. Background technique [0002] Polyethersulfones are widely used in both industrial and pharmaceutical industries, but their easy-to-contaminate properties severely limit their applications. Because its pollution is caused by hydrophobicity, there have been some reports on its hydrophilic modification, and obtained a certain anti-pollution effect. Existing hydrophilic modification methods include: chemical grafting or surface coating of hydrophilic molecules, layer-by-layer self-assembly of hydrophilic molecules, surface reactions of hydrophilic molecules induced by plasma or ultraviolet rays, addition of hydrophilic monomers for copolymerization, or addition of hydrophilic molecules. Water-polymer blending, etc. (Zha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/38C08G75/23B01D71/78
Inventor 孟琴张倩沈冲
Owner ZHEJIANG UNIV
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