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A kind of sulfonated polyphenol nanofiltration membrane and preparation method thereof

A technology of sulfonated polyphenols and sulfonated polyphenols, which is applied in the field of nanofiltration membranes, can solve the problems of low water flux of nanofiltration membranes, and achieve the effects of good anti-pollution ability, large industrialization potential, and water flux improvement

Active Publication Date: 2022-04-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a sulfonated polyphenol nanofiltration membrane and its preparation method. low volume problem

Method used

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  • A kind of sulfonated polyphenol nanofiltration membrane and preparation method thereof
  • A kind of sulfonated polyphenol nanofiltration membrane and preparation method thereof
  • A kind of sulfonated polyphenol nanofiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve sulfonated dopamine (SDA) in a buffer solution with a pH of 8.5 at a concentration of 0.05 wt%, and ultrasonically dissolve it completely for 10 minutes; immerse the wet polyacrylonitrile support membrane after alkali treatment in the aqueous phase solution, and the immersion time for 20 minutes, take it out and dry it for use; configure the cyclohexane oil phase solution of trimesoyl chloride, the concentration is 0.15wt%; immerse the support membrane in the oil phase solution, the reaction time is 1min, take it out; put the composite membrane at 60°C Heat treatment in an oven for 30 minutes; then rinse with deionized water several times to obtain a sulfonated polyphenol nanofiltration membrane.

Embodiment 2

[0023] The difference from Example 1 is that the concentration of sulfonated dopamine (SDA) is 0.1 wt%.

Embodiment 3

[0025] The difference from Example 1 is that the concentration of sulfonated dopamine (SDA) is 0.6wt%.

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Abstract

The invention relates to a sulfonated polyphenol nanofiltration membrane and a preparation method thereof, comprising a supporting bottom membrane and a separation surface layer, wherein the separation surface layer is formed by a cross-linked reaction product of sulfonated polyphenols and aromatic acid chlorides. Due to the introduction of sulfonic acid groups in the present invention, on the one hand, it can regulate the interfacial polymerization process to obtain a smooth and loose interfacial polymerization layer; on the other hand, it can endow the nanofiltration membrane with higher hydrophilicity and negative charge, ensuring high At the same time of salt interception, the water flux of the membrane is greatly improved, and it also has good anti-pollution ability, and has great industrialization potential.

Description

technical field [0001] The invention belongs to the field of nanofiltration membranes, in particular to a sulfonated polyphenol nanofiltration membrane and a preparation method thereof. Background technique [0002] As a membrane separation technology whose operating pressure is between that of ultrafiltration and reverse osmosis, nanofiltration has received extensive attention. As a key component of nanofiltration technology, nanofiltration membrane usually has a molecular weight cut-off of 200-1000Da. Traditional nanofiltration membranes are mostly prepared by interfacial polymerization of piperazine or m-phenylenediamine as water phase monomers and oil phase acid chlorides. However, the low water flux of these nanofiltration membranes seriously restricts its further development. [0003] Polyphenol monomers are rich in phenolic hydroxyl groups and can self-polymerize under certain pH conditions to adhere to the surface of objects. At the same time, polyphenols come from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/10B01D69/02B01D67/00
CPCB01D69/105B01D69/02B01D67/0093B01D61/027B01D2325/36B01D2325/14
Inventor 丁金成吴慧青武培怡
Owner DONGHUA UNIV
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