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Hydrophilic polyether sulfone ultrafiltration membrane and preparation method thereof

A polyethersulfone ultrafiltration membrane and hydrophilic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as excellent water quality, difficulty in obtaining, and difficulty in meeting multi-performance requirements, and achieve Stable performance, improved performance and reduced waste

Active Publication Date: 2016-04-06
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the technical scheme of the ultrafiltration membrane and its preparation method in the prior art is also difficult to meet the multi-performance requirements, but only from a single aspect to meet the performance of the ultrafiltration membrane; After ultrafiltration membrane filtration, it is always difficult to obtain relatively good water quality. Therefore, through long-term efforts and explorations, the researchers provided a new idea for the field of ultrafiltration membranes and their preparation

Method used

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  • Hydrophilic polyether sulfone ultrafiltration membrane and preparation method thereof

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Effect test

Embodiment 1

[0033] A kind of hydrophilic polyethersulfone ultrafiltration membrane, its raw material is polyethersulfone 15kg, polyvinyl alcohol 0.05kg, dimethylsulfoxide (DMSO) is 82.95kg, PEG400 (polyethylene glycol 400) is 2kg, lemon The acid is 0.05kg, and the glutaraldehyde is 0.05kg.

[0034] Its specific preparation method comprises the following steps:

[0035] (1) Dissolve polyethersulfone and polyvinyl alcohol in the organic solvent in sequence according to the above mass parts, and use a stirrer to stir evenly, then add the above mass parts porogen, and continue to use the stirrer to stir and mix evenly, let stand After 12 hours, vacuum defoaming was performed on the mixed solution to obtain a clear and transparent solution.

[0036] (2) Put the clear and transparent solution obtained in step 1) on a non-woven fabric for scraping, and then place it in water at 60° C. for reverse osmosis treatment for 15 hours.

[0037](3) the ultrafiltration membrane preliminary product that ...

Embodiment 2

[0042] A kind of hydrophilic polyethersulfone ultrafiltration membrane, on the basis of embodiment 1, other preparation method steps are with embodiment 1, and its raw material is polyethersulfone 20kg, polyvinyl alcohol 0.05kg, dimethyl sulfoxide (DMSO ) is 77.95kg, PEG400 (polyethylene glycol 400) is 2kg, citric acid is 1kg, and glutaraldehyde is 1kg.

Embodiment 3

[0044] A kind of hydrophilic polyethersulfone ultrafiltration membrane, on the basis of embodiment 1, other preparation method steps are with embodiment 1, and its raw material is polyethersulfone 18kg, polyvinyl alcohol 0.05kg, dimethyl sulfoxide (DMSO ) was 79.95kg, PEG400 (polyethylene glycol 400) was 2kg, citric acid was 0.05kg, and glutaraldehyde was 1kg.

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Abstract

The invention relates to the technical field of membranes, and especially relates to a hydrophilic polyether sulfone ultrafiltration membrane and a preparation method thereof. The ultrafiltration membrane comprises polyether sulfone, polyvinyl alcohol, an organic solvent, a pore-forming agent, a crosslinking agent A, and a crosslinking agent B. The preparation method comprises the following step: polyether sulfone and polyvinyl alcohol are dissolved in the organic solvent; the pore-forming agent is added; the mixture is fully mixed through mechanical stirring; the mixture is allowed to stand, and is subjected to vacuum defoaming, such that a clarified transparent solution is obtained; the solution is subjected to membrane scraping on a piece of nonwoven fabric; under the effect of sulfuric acid with a mass percentage of 1%, through a crosslinking reaction, the crosslinking agent A and the crosslinking agent B are grafted on the surface of the ultrafiltration membrane, such that the ultrafiltration membrane is obtained. The obtained ultrafiltration membrane has good contamination resistance, good hydrophilicity, good temperature resistance, and relatively high durability. The properties of the membrane are stable, and the hydrophilic layer is not prone to loss.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a hydrophilic polyethersulfone ultrafiltration membrane and a preparation method thereof. Background technique [0002] The ultrafiltration membrane is one of the earliest developed polymer separation membranes, and the ultrafiltration device was industrialized in the 1960s. It is widely used in various separation and purification processes in electronics, chemical industry, medicine, food and other industries. However, the problem of filter membrane fouling is still prominent. Many experts and scholars have done a lot of research work on solving the problem of filter membrane fouling. They believe that increasing the hydrophilicity of the membrane surface is a very effective way to improve the membrane pollution resistance. , including the use of hydrophilic materials to directly form membranes or the hydrophilic modification of ultrafiltration membrane surfaces. For example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00
Inventor 梁松苗郭玉阳蔡志奇吴宗策金焱
Owner VONTRON TECH CO LTD
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