Anti-pollution cyclodextrin-polymer composite nano-filtration membrane and preparation method thereof

A composite nanofiltration membrane and cyclodextrin technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve the effects of mild reaction conditions, stable structure, good separation and anti-pollution performance

Inactive Publication Date: 2012-01-25
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the reported cyclodextrin-polymer membranes mainly use the molecular recognition characteristics of the cavity structure of cyclodextrin and are mostly used in the separation process of pervaporation membranes, while the hydrophilic characteristics of cyclodextrin and its role in pressure-driven membranes applications are rarely reported

Method used

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  • Anti-pollution cyclodextrin-polymer composite nano-filtration membrane and preparation method thereof
  • Anti-pollution cyclodextrin-polymer composite nano-filtration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0034] (1) Preparation of oil phase solution: Dissolve trimesoyl chloride in n-hexane to prepare a solution with a concentration of 0.006 g / mL;

[0035] (2) Preparation of the aqueous phase solution: the concentration of triethanolamine is 0.06 g / mL, the concentration of sodium lauryl sulfate is 0.003 g / mL, and NaOH / Na 2 CO 3 (mass ratio 1:2) an aqueous solution with a concentration of 0.006 g / mL, and then dissolve β-cyclodextrin with a concentration of 0 to 0.024 g / mL in the above solution;

[0036] (3) Immerse the wet polysulfone support membrane in the oil phase solution for 30 minutes, take it out, roll the surface of the support membrane with a rubber roller, and squeeze it dry; immerse the support membrane in the water phase solution, the reaction time is 35 minutes, and take it out; The film was immersed in the oil phase solution, and the reaction time was 35 minutes. After the composite film was naturally dried in the air for 1 minute, it was dried at 60 o Heat trea...

Embodiment 5-6

[0042] (1) preparation of oil phase solution: with embodiment 1-4;

[0043] (2) Preparation of the aqueous phase solution: the concentration of triethanolamine is 0.06 g / mL, the concentration of sodium lauryl sulfate is 0.003 g / mL, and NaOH / Na 2 CO 3 (mass ratio 1:2) an aqueous solution with a concentration of 0.006 g / mL, and then β-cyclodextrin with a concentration of 0.018 g / mL dissolved in the above solution;

[0044] (3) with embodiment 1-4;

[0045] (4) Immerse the above composite membrane in an aqueous solution containing 0.001 g / mL sodium dodecyl sulfate at pH = 11 for 0-24 hours, and then rinse with water. A cyclodextrin-polyester composite nanofiltration membrane is obtained. Its desalination performance was tested under the conditions of 5mmol / L sodium sulfate aqueous solution and operating pressure of 0.6 MPa.

[0046] These several examples are to investigate the effect of post-treatment time on membrane performance.

[0047]

[0048] From Examples 5-6, it...

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Abstract

The invention belongs to the technical field of membranes, and particularly provides an anti-pollution cyclodextrin-polymer composite nano-filtration membrane and a preparation method thereof. The cyclodextrin-polymer composite nano-filtration membrane is prepared by compounding a cyclodextrin-containing aromatic polymer functional cortex on a porous support membrane by virtue of an interfacial polymerization method. In the nano-filtration membrane, the porous support membrane is immersed in an oil-phase solution, in a cyclodextrin-containing aqueous-phase solution and in the oil-phase solution; and the cyclodextrin is loaded to the composite membrane functional cortex by virtue of interfacial polymerization, and the structure is stable. The preparation method has a simple operation process and mild reaction conditions; and by virtue of the annular cavity structure of the cyclodextrin and massive hydroxy carried by the cyclodextrin, the water flux, hydrophilicity and pollution resistance of the membrane are improved.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to an anti-pollution cyclodextrin-polymer composite nanofiltration membrane and a preparation method thereof. Background technique [0002] Cyclodextrin (Cyclodextrin, CD) is a kind of cyclic oligosaccharides composed of D-glucopyranose linked by α-1,4 glycosidic bonds. Among them, the number of glucose residues is generally 6, 7, and 8, which are called α-cyclodextrin, β-cyclodextrin and γ-cyclodextrin respectively. The molecular configuration of cyclodextrin is relatively special, which is hollow and truncated, and the glycoside oxygen bridge atoms are arranged inside the cavity, and the hydrogen atoms on C-3 and C-5 of the glucopyranose ring are located in the cavity and cover the ligand. The sugar oxygen atoms make the inside of the cavity a hydrophobic space; the edge of the cyclodextrin molecular cavity contains hydroxyl groups, making the outside of the cavity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/08B01D71/68B01D67/00B01D69/12
Inventor 吴慧青汤蓓蓓武培怡
Owner FUDAN UNIV
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