A composite nanofiltration membrane with environmental responsiveness and preparation method thereof

An environmentally responsive, composite nanofiltration membrane technology, applied in the field of nanofiltration membranes, can solve problems such as restricting and controllable regulation of transmission, and achieve the effects of permeability, good application prospects, and mild reaction conditions.

Active Publication Date: 2021-03-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, under environmental stimuli, the existing environmental-responsive separation membranes often change in permeability and selectivity, which limits their controllable and adjustable transport in different environments.

Method used

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  • A composite nanofiltration membrane with environmental responsiveness and preparation method thereof
  • A composite nanofiltration membrane with environmental responsiveness and preparation method thereof
  • A composite nanofiltration membrane with environmental responsiveness and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0026] (1) Take temperature-responsive SiO 2 @PNIPAM nanoparticles are loaded on polysulfone membrane in the form of suction filtration, and the loading capacity is 2.97μg / cm 2 , 5.94μg / cm 2 , 8.91μg / cm 2 and 11.9 μg / cm 2 , where SiO 2 @PNIPAM is based on SiO 2 Core-shell nanoparticles with PNIPAM as the core and shell as the shell.

[0027] (2) Immerse the basement film loaded with nanoparticles prepared above in 0.3% w / v piperazine / water solution, soak for 5 minutes, take out and remove the excess aqueous phase solution on the surface until there are no obvious water droplets;

[0028] (3) The above membrane was immersed in the oil phase solution of 0.15w / v% trimesoyl chloride / cyclohexane, and the interfacial polymerization reaction was performed for 1 minute to obtain a composite nanofiltration membrane, which was immersed in deionized water for testing.

Embodiment 5-7

[0030] Examples 5-7 are basically the same as Example 1, except that the loaded nanoparticles are pH-responsive P(St-co-AA), and the loading masses are 9.82 μg / cm 2 , 19.6μg / cm 2 , 49.1μg / cm 2 . Among them, P(St-co-AA) is a core-shell nanoparticle with PS as the core and PAA as the shell.

Embodiment 8-10

[0032] Embodiments 8-10 are basically the same as Example 1, except that the loaded nanoparticles are P(NIPAM-co-AA) that responds simultaneously to temperature and pH, and the load mass is 8.26 μg / cm 2 , 16.5μg / cm 2 , 33.0μg / cm 2 .

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Abstract

The invention relates to a composite nanofiltration membrane with environmental responsiveness and a preparation method thereof. The composite nanofiltration membrane comprises a porous support membrane, an environmental responsiveness nanoparticle middle layer and a separation surface layer. The composite nanofiltration membrane provided by the invention has excellent separation performance, theseparation performance has unique environmental responsiveness, and controllable adjustment of permeability can be realized on the premise of keeping selectivity; the preparation operation is simple and convenient, the reaction condition is mild, and the application prospect is good.

Description

technical field [0001] The invention belongs to the field of nanofiltration membranes, in particular to a composite nanofiltration membrane with environmental responsiveness and a preparation method thereof. Background technique [0002] The pore size of the nanofiltration membrane is in the nanometer range, and the molecular weight cut-off is between 200 and 1000 Da. It can efficiently separate salts of monovalent or multivalent ions, and has been widely used in water treatment. Traditional nanofiltration membranes are mainly formed by interfacial polymerization of diamines and acid chlorides on a porous support layer. [0003] In recent years, in order to further improve the separation performance of nanofiltration membranes, researchers have adjusted them by introducing an intermediate layer into the support layer and polyamide layer. The middle layer can not only control the interfacial polymerization process, reduce the thickness of the polyamide layer, reduce the wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/02B01D67/00B01D69/12B01D71/34B01D71/42B01D71/56B01D71/68
CPCB01D61/027B01D67/0006B01D69/12B01D71/34B01D71/42B01D71/56B01D71/68
Inventor 吴慧青王月武培怡
Owner DONGHUA UNIV
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