Preparation method of dual anti-pollution ultrafiltration membrane

An anti-pollution, ultrafiltration membrane technology, applied in ultrafiltration, chemical instruments and methods, membrane technology, etc., can solve the problem that the doping amount of hydrophilic polymers should not be too high, it is difficult to scale production, polysulfone molecular modification sexual difficulties
CN112791599AActive Publication Date: 2021-05-14NORTHWEST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTHWEST UNIV
Publication Date
2021-05-14

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Abstract

The invention discloses a dual anti-pollution ultrafiltration membrane as shown in a structural formula (I). According to the invention, a blending membrane preparation technology is adopted, and the hydrophilic-hydrophobic block polymer is introduced to improve the anti-pollution performance of a membrane substrate; and then a dendritic hydrophilic polymer anti-pollution layer is constructed on the surface of the membrane substrate by adopting an atom transfer radical polymerization technology to achieve a dual anti-pollution effect. The ultrafiltration membrane can reduce the regeneration frequency in the water treatment process to a certain extent, improve the production efficiency and reduce the water treatment cost.
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Description

technical field

[0001] The invention relates to a preparation method of a double anti-pollution ultrafiltration membrane, which belongs to the technical field of polymer membrane materials. Background technique

[0002] Polymer ultrafiltration membranes are widely used in sewage treatment, seawater desalination, food processing, biomedicine, bioengineering, chemical industry and other fields. As a thermoplastic material, polysulfone is widely used as a substrate for ultrafiltration membranes due to its cheap and easy to obtain, good mechanical properties, good chemical stability, and compression and wear resistance. However, the surface of polysulfone membrane has strong hydrophobicity, and it is easy to adsorb protein molecules, resulting in pore blockage and membrane fouling, resulting in reduced reuse efficiency. Therefore, in order to improve the anti-fouling performance of polysulfone membranes, hydrophilic modification of polysulfone membranes is the main method for p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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