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Sulphobetaine metacrylic acid ester grafted polysulfone copolymer as well as preparation method and application of polysulfone copolymer

A technology of alkali methacrylate and sulfobeet, which is applied in the field of preparation of anti-fouling membranes, can solve problems such as difficult grafting reaction, and achieve excellent anti-protein and platelet effects

Inactive Publication Date: 2013-07-17
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 on the grafting of SBMA on polyvinylidene fluoride, polypropylene and regenerated cellulose membrane materials. However, due to the relatively stable chemical structure of polysulfone, it is difficult to undergo grafting reactions. A report on sulfone grafted SBMA

Method used

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  • Sulphobetaine metacrylic acid ester grafted polysulfone copolymer as well as preparation method and application of polysulfone copolymer
  • Sulphobetaine metacrylic acid ester grafted polysulfone copolymer as well as preparation method and application of polysulfone copolymer
  • Sulphobetaine metacrylic acid ester grafted polysulfone copolymer as well as preparation method and application of polysulfone copolymer

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Experimental program
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Effect test

Embodiment 1

[0049]Add 1.8g CMPSU to 50ml DMSO, stir and dissolve for 12h, add 5.0g SBMA, stir and dissolve for 2h, pass nitrogen for 5h to remove oxygen, add 50mg CuCl, 100mg BPy, react at 60°C for 5h, stop nitrogen to terminate the reaction, and obtain DMSO solution containing SBMA-g-PSU product. After the copolymer was precipitated and dried, the elemental analysis was carried out, and the nitrogen element content was measured to be 2.05%, and the converted grafting rate was 52%.

Embodiment 2

[0051] Dissolve 3.6 g of SBMA-PSU (37% grafting rate) and 3.6 g of PSU in 40 mL of NMP, stir for 12 h, and remove air bubbles. The film was scraped off on a glass plate with a spatula, and immersed in pure water to obtain a SBMA-grafted PSU flat film. The resulting flat membrane thickness is about 100 μm, the average membrane pore size is 0.67 μm, and the albumin rejection rate is 93%. Its structure is as figure 1 shown.

Embodiment 3

[0053] Dissolve 0.36 g of SBMA-PSU (37% grafting rate) and 3.6 g of PSU in 20 mL of NMP, stir for 12 h, and remove air bubbles. The film was scraped off on a glass plate with a spatula, and immersed in pure water to obtain a SBMA-grafted PSU flat film. The resulting flat membrane thickness is about 100 μm, the average membrane pore size is 0.21 μm, and the albumin rejection rate is 98%.

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Abstract

The invention discloses a sulphobetaine metacrylic acid ester grafted polysulfone copolymer as well as a preparation method and an application of the polysulfone copolymer. The copolymer disclosed by the invention is prepared by implementing solution radical polymerization under the action of a catalyst by taking SBMA (Sulphobetaine Metacrylic Acid) and PSU (Polysulfone) as raw materials and dimethylsulfoxide as a solvent. The copolymer disclosed by the invention is a white amorphous solid at normal temperature, can be dissolved in dimethylsulfoxide and N-methylpyrrolidone and cannot be dissolved in water and alcohol. The copolymer and the PSU can be prepared to flat sheet membranes and hollow fiber membranes to a scale. Due to the excellent capability of resisting pollutants such as protein and soterocyte, the flat sheet membranes and the hollow fiber membranes prepared by the preparation method disclosed by the invention can be used as materials contacted to the blood, cytoskeletons, separated biomass fermentation solution materials and 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 polysulfone (PSU) graft copolymer grafted with sulfobetaine methacrylate (SBMA) and its application. Background technique [0002] Polysulfone is a widely used membrane material in industry, but its fouling characteristics 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. (N Nady, et al, Desalination, 2011, 275:1-9). Among them,...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/38C08L51/08C08J5/18B01D71/78B01D69/06B01D67/00B01D69/08D01D5/06D01D5/247
CPCC08G75/23
Inventor 沈冲孟琴张倩
Owner ZHEJIANG UNIV
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