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Polyether sulfone grafted N-vinylpyrrolidone copolymer, film and preparation methods

A technology of vinylpyrrolidone and polyethersulfone, which is applied in the field of polyethersulfone grafted N-vinylpyrrolidone monomer copolymers, can solve the problems of polyethersulfone membrane flux, clogging, and material properties. Achieve the effects of no obvious drop in pure water flux, flexible application, and improved performance

Inactive Publication Date: 2018-01-30
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome certain bands of ultraviolet light when in the prior art grafting N-vinylpyrrolidone (NVP for short) monomer on the surface of polyethersulfone membrane (PES membrane) is induced by ultraviolet light, It has obvious degradation effect on polyethersulfone, which will affect the properties of the material itself. Moreover, grafting on the surface of polyethersulfone membrane will easily form graft chains that block the pores of polyethersulfone membrane. The defect that the flux has a greater impact provides a polyethersulfone grafted N-vinylpyrrolidone copolymer, a film and a preparation method

Method used

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  • Polyether sulfone grafted N-vinylpyrrolidone copolymer, film and preparation methods
  • Polyether sulfone grafted N-vinylpyrrolidone copolymer, film and preparation methods
  • Polyether sulfone grafted N-vinylpyrrolidone copolymer, film and preparation methods

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Accurately weigh 15g of the pretreated PES powder, dissolve it in 81g of NMP solvent, add 4g of NVP monomer, stir for 24 hours to obtain a homogeneous solution, pass N 2 After more than 15min, place the homogeneous solution in 60 C O Under the source, the radiation reaction was carried out at 25°C, the dose rate was 1.67kGy / h, and the absorbed dose was 30kGy.

[0057] After the irradiation reaction is completed, the obtained homogeneous solution is post-treated according to the following steps: reverse-phase precipitate the homogeneous solution in deionized water, wash the obtained white solid several times, soak it in deionized water for 24 hours, and deionize Pour off the water, and vacuum-dry the obtained solid in a vacuum oven (50° C., vacuum degree 0.07 MPa) to constant weight.

Embodiment 2

[0059] Accurately weigh 15g of the pretreated PES powder, dissolve it in 78g of NMP solvent, add 7g of NVP monomer, stir for 24 hours to obtain a homogeneous solution, pass N 2 After more than 15min, place the homogeneous solution in 60 C O Under the source, the radiation reaction was carried out at 25°C, the dose rate was 1.67kGy / h, and the absorbed dose was 30kGy.

[0060] After the irradiation reaction is completed, the obtained homogeneous solution is subjected to a post-treatment operation, which is the same as the operation and conditions of Example 1.

Embodiment 3

[0062] Accurately weigh 15g of the pretreated PES powder, dissolve it in 73g of NMP solvent, add 12g of NVP monomer, stir for 24 hours to obtain a homogeneous solution, pass N 2 After more than 15min, place the homogeneous solution in 60 C O Under the source, the radiation reaction was carried out at 25°C, the dose rate was 1.67kGy / h, and the absorbed dose was 30kGy.

[0063] After the irradiation reaction is completed, the obtained homogeneous solution is subjected to a post-treatment operation, which is the same as the operation and conditions of Example 1.

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Abstract

The invention discloses a polyether sulfone (PES) grafted N-vinylpyrrolidone copolymer, a film and preparation methods. The preparation method of the copolymer comprises the following steps: in a homogeneous solution containing N-vinylpyrrolidone and polyether sulfone, the N-vinylpyrrolidone and the polyether sulfone are subjected to a direct radiation grafting reaction, and therefore the copolymer is obtained, wherein the solvent of the homogeneous solution is one or more selected from NMP, DMF, DMAC and DMSO; and the mass ratio of the polyether sulfone to the N-vinylpyrrolidone is (15:4)-(15:15). The grafted copolymer provided by the invention can effectively improve the polarity of the copolymer and the flexibility of the molecular chain; the grafted copolymer is not easy to crosslink,and has good hydrophilic properties and good solubility; when the film is prepared, the compatibility of the grafted copolymer, organic solvents and a pore-forming agent is good; and because the grafting ratio of the grafted copolymer is within a specific range, the hydrophilic groups of the obtained film are distributed more uniformly, the hydrophilicity is better, the anti-pollution effects aremore excellent, and decrease of a pure-water flux is not obvious.

Description

technical field [0001] The invention relates to a polyethersulfone grafted N-vinylpyrrolidone monomer copolymer, a film and a preparation method. Background technique [0002] Polyethersulfone (PES) is a polymer material widely used in industry with superior mechanical properties. Its creep resistance is very outstanding. Under higher temperature and larger load, the creep resistance is still very stable. , and polyethersulfone can still maintain good thermodynamic properties after long-term use at high temperatures. The molecular structure of polyethersulfone is composed of ether group, sulfone group and phenylene group. The ether group endows the flexibility of the polymer molecular chain, while the sulfone group and phenylene endow the polymer with excellent thermodynamic properties and processing properties. . These excellent thermodynamic properties make polyethersulfone and its derivatives widely used in water treatment, petrochemical, food processing, electronics, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F226/10C08F2/46C08J5/18C08L51/08
Inventor 侯铮迟黄健熹杨海军樊凯孙雪晴陆闰三
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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