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Preparation method of self-assembled folded rGO composite membrane

A self-assembly, composite membrane technology, applied in the field of membrane separation, can solve the problems of low flux, long diffusion path, large resistance, etc., and achieve the effects of simple preparation process, uniform and dense surface, and short film formation time.

Active Publication Date: 2018-07-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, based on the difficulty of adjusting and controlling the interlayer distance of graphene oxide, the diffusion path of separated components in general sheet graphene after film formation is long, the resistance is large, and the flux is generally low. Graphene oxide has more wrinkled morphology in a unique way, and assembled with glutaraldehyde cross-linking agent, sodium alginate, calcium chloride, etc. to obtain self-assembled wrinkled rGO composite film

Method used

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  • Preparation method of self-assembled folded rGO composite membrane
  • Preparation method of self-assembled folded rGO composite membrane
  • Preparation method of self-assembled folded rGO composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The commercial porous membrane used is alumina material in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-1.0 μm and a membrane area of ​​10 cm 2 , the selected organic solvent is DMF, and the crosslinking agent A is glutaraldehyde.

[0046] Preparation method of self-assembled wrinkled rGO composite membrane

[0047] (1) Rinse the ceramic substrate four times with deionized water, ultrasonically treat it for 3 minutes, then rinse it four times with deionized water, soak it in a water bath at 90°C for 2 hours, and put it in an oven to dry to remove surface impurities and microorganisms;

[0048] (2) Tris3.025g, dopamine 1.000g, copper sulfate 0.624g and 30%H 2 o 2 1mL was dissolved in 500mL deionized water successively to deposit dopamine on the pretreated porous base film to form a polydopamine-modified layer with rich amine groups, and the deposition time was 3h;

[0049] (3) Suction filter GO onto the porous base membrane with rich...

Embodiment 2

[0056] The commercial porous membrane used is alumina material in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-1.0 μm and a membrane area of ​​10 cm 2 , the selected organic solvent is DMF, the polyelectrolyte is PEI, and the crosslinking agents A and B are glutaraldehyde.

[0057] Preparation method of self-assembled wrinkled rGO composite membrane

[0058] (1) Rinse the ceramic substrate four times with deionized water, ultrasonically treat it for 3 minutes, then rinse it four times with deionized water, soak it in a water bath at 90°C for 2 hours, and put it in an oven to dry to remove surface impurities and microorganisms;

[0059] (2) Tris3.025g, dopamine 1.000g, copper sulfate 0.624g and 30%H 2 o 2 1mL was dissolved in 500mL deionized water successively to deposit dopamine on the pretreated porous base film to form a polydopamine-modified layer with rich amine groups, and the deposition time was 3h;

[0060] (3) Suction filter GO ont...

Embodiment 3

[0068] The commercial porous membrane used is alumina material in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-1.0 μm and a membrane area of ​​10 cm 2 .

[0069] Preparation method of self-assembled wrinkled rGO composite membrane

[0070] (1) Rinse the ceramic substrate four times with deionized water, ultrasonically treat it for 3 minutes, then rinse it four times with deionized water, soak it in a water bath at 90°C for 2 hours, and put it in an oven to dry to remove surface impurities and microorganisms;

[0071] (2) Tris3.025g, dopamine 1.000g, copper sulfate 0.624g and 30%H 2 o 2 1mL was dissolved in 500mL deionized water successively to deposit dopamine on the pretreated porous base film to form a polydopamine-modified layer with rich amine groups, and the deposition time was 3h;

[0072] (3) Suction filter GO onto the porous base membrane with rich amine groups, the concentration of graphene oxide is 0.01g / L, and the assembly time ...

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Abstract

The invention discloses a preparation method of a self-assembled folded rGO composite membrane used for dehydration of organic matter and belongs to the field of membrane separation. The method comprises steps as follows: GO (graphene oxide) is sucked to a pretreated porous base membrane with rich amino, then, the base membrane is put in a preheated organic solvent to be modified and put in a glutaraldehyde water solution to be crosslinked, then, a polyelectrolyte is sucked to the surface of the modified GO composite membrane, and finally, the modified GO composite membrane is put in a water solution of a crosslinking agent to be crosslinked. The preparation process is simple, the film forming time is short, the composite membrane is applied to the field of pervaporation, the problems thatthe GO composite membrane has small flux and low separation factor in the pervaporation process are solved, and the composite membrane has uniform and compact surface and can be widely applied to thefield of water treatment.

Description

technical field [0001] The invention relates to a preparation method of a self-assembled wrinkled rGO composite membrane, which is used for dehydration of organic matter and belongs to the field of membrane separation. Background technique [0002] The separation performance of the membrane in membrane separation technology depends on the membrane material and membrane structure. In recent years, two-dimensional layered materials such as layered metal hydroxide, graphene, graphene oxide (GO), etc. It is increasingly used in the preparation of separation membranes. As an ultrathin two-dimensional material, single-atom-thick graphene oxide has the advantages of excellent chemical stability, low toxicity and biocompatibility. The surface has a large number of hydrophilic functional groups, which are easy to accumulate on the surface of the substrate through covalent bonds, hydrogen bonds, and van der Waals forces to form nano-scale lamellar channels, which play a good role in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D61/36B01D69/04B01D69/06
CPCB01D61/362B01D69/046B01D69/06B01D69/125B01D2325/06
Inventor 王乔木孟洪
Owner BEIJING UNIV OF CHEM TECH
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