Permanent antibacterial polyether sulfone membrane material and preparation method thereof

A technology of polyethersulfone membrane and polyethersulfone, which is applied in the field of polyethersulfone membrane material and its preparation, can solve the problems of unsatisfactory polymer grafting conditions, inhomogeneity of material properties, and low radiation energy, and achieve excellent antibacterial and hydrophilic properties, good electrochemical and thermal stability, and simple industrial preparation

Pending Publication Date: 2020-01-14
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, because the PES membrane material itself is relatively hydrophobic, in order to solve the problems of hydrophilicity, anti-fouling and antibacterial properties of the PES membrane material, researchers have been developing a more hydrophilic material by modifying the PES membrane material. PES film material
However, the existing modification method faces many problems: 1. the material after modification has the problem of inhomogeneity and instability in performance; 2. high cost, causing pollution to the environment; so the present invention mainly relates to a Modification method of stable radiation-grafted ionic liquid
Irradiation grafting can be mainly divided into electron beam radiation and Co-γ radiation according to the radiation source. Electron beam radiation has good stability, but the radiation energy is too small to meet the grafting conditions of some polymers. Therefore, we are studying different After the effect of radiation source on the irradiation grafting of PES, Co-γ irradiation grafted ionic liquid was selected

Method used

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  • Permanent antibacterial polyether sulfone membrane material and preparation method thereof
  • Permanent antibacterial polyether sulfone membrane material and preparation method thereof
  • Permanent antibacterial polyether sulfone membrane material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Step (1) First, 9.8g of PES and 0.2g of 1-vinyl-3-butylimidazolium tetrafluoroborate were added to the reaction kettle at a temperature of 60°C, and the solution was blended for 6h; then, the solution was cooled to At room temperature, it was poured into a PTFE mold for film laying, and the obtained film was volatilized with solvent and vacuum-dried for 24 hours to finally obtain a blended film of grafted ionic liquid. Recorded as 2wt%-PES modified film.

[0050] Step (2) Put the above-mentioned 2wt%-PES modified film in a polyethylene ziplock bag. In Co-γ irradiation, irradiation at room temperature was carried out at a dose of 30 kGy.

[0051] Step (3) directly press-molding the grafted blend obtained by the above-mentioned irradiation to obtain a PES modified membrane, the molding temperature is 250° C., the pressure is 10 MPa, the pressure is maintained for 3 minutes, and the thickness is 300 microns.

Embodiment 2

[0053] Step (1) First, 9.6g of PES and 0.4g of 1-vinyl-3-butylimidazolium tetrafluoroborate were added to the reaction kettle at a temperature of 60°C, and the solution was blended for 6h; then, the solution was cooled to At room temperature, it was poured into a PTFE mold for film laying, and the obtained film was volatilized with solvent and vacuum-dried for 24 hours to finally obtain a blended film of grafted ionic liquid. Recorded as 4wt%-PES modified film.

[0054] Step (2) Put the above-mentioned 4wt%-PES modified film in a polyethylene ziplock bag. In Co-γ irradiation, irradiation at room temperature was carried out at a dose of 30 kGy.

[0055] Step (3) directly press-molding the grafted blend obtained by the above-mentioned irradiation to obtain a PES modified membrane, the molding temperature is 250° C., the pressure is 10 MPa, the pressure is maintained for 3 minutes, and the thickness is 300 microns.

Embodiment 3

[0057] Step (1) First, 9.4g of PES and 0.6g of 1-vinyl-3-butylimidazolium tetrafluoroborate were added to the reaction kettle at a temperature of 60°C, and the solution was blended for 6h; then, the solution was cooled to At room temperature, it was poured into a PTFE mold for film laying, and the obtained film was volatilized with solvent and vacuum-dried for 24 hours to finally obtain a blended film of grafted ionic liquid. Recorded as 6wt%-PES modified film.

[0058] Step (2) Put the above-mentioned 6wt%-PES modified film in a polyethylene ziplock bag. In Co-γ irradiation, irradiation at room temperature was carried out at a dose of 30 kGy.

[0059] Step (3) directly press-molding the grafted blend obtained by the above-mentioned irradiation to obtain a PES modified membrane, the molding temperature is 250° C., the pressure is 10 MPa, the pressure is maintained for 3 minutes, and the thickness is 300 microns.

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Abstract

The invention discloses a permanent antibacterial polyether sulfone membrane material and a preparation method thereof. According to the invention, through a Co-gamma radiation grafting chemical modification method, a unsaturated bond-containing ionic liquid connected by chemical bonds is uniformly distributed on the surface of polyethersulfone, wherein a mass ratio of the ionic liquid to the polyethersulfone is 2-11:100; according to the method, through radiation irradiation, the ionic liquid of the blended flat plate membrane is connected to the polymer through the chemical bond; and due togood compatibility between the polymer and the ionic liquid, the small molecules of the ionic liquid can fully contact the polymer during radiation irradiation, so that the small molecules of the ionic liquid are grafted to the PES molecular chain.

Description

technical field [0001] The invention relates to a permanent antibacterial polyethersulfone membrane material and a preparation method thereof, in particular to a polymer composite material uniformly distributed on the surface of the material and connected with an ionic liquid through chemical bonds and a preparation method thereof. Background technique [0002] Polymer membrane materials are widely used in the fields of hygiene, medical treatment, biology and water treatment, and are generally made of membrane materials such as polyester, polysulfone, polyvinylidene fluoride, and polyurethane. The present invention mainly uses commercialized polyethersulfone (PES) as the membrane material, mainly because PES has good thermal stability, excellent mechanical properties and chemical corrosion resistance, and there are certain differences between PES and PVDF, etc. at the same time. An amorphous polymer, in the process of film formation, there is no need to consider the influenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F226/06C08F2/46C08J5/18C08L51/08
CPCC08F283/00C08J5/18C08J2351/08C08F226/06C08F2/46
Inventor 李勇进倪春军郑鑫
Owner HANGZHOU NORMAL UNIVERSITY
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