Unlock instant, AI-driven research and patent intelligence for your innovation.

Separation membrane based on zwitterion functionalized graphene oxide and preparation method of separation membrane

A zwitterionic, functional technology, applied in chemical instruments and methods, semi-permeable membrane separation, membranes, etc., can solve the problems of reduced flux and low separation efficiency, and achieve the effects of enhanced affinity, simple and economical process, and improved efficiency

Inactive Publication Date: 2019-12-10
NANJING TECH UNIV
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these studies have focused on tuning the physical size of the mass transfer channels between the layers of graphene oxide membranes, which usually leads to an increase in separation factor and stability, but with a decrease in flux, it also leads to lower separation efficiency.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Separation membrane based on zwitterion functionalized graphene oxide and preparation method of separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Graphene oxide nanosheets are uniformly dispersed in N-N-2-methylformamide, the concentration is 0.2mg / ml, ethanolamine and propane sultone are respectively dispersed in N-N-2-methylformamide, The concentration is 1mg / ml.

[0030] (2) Take 30ml of graphene oxide solution, add 12ml of ethanolamine solution with 2 times the content of graphene oxide, react at 40°C for 1h, then add 12ml of propane sultone solution with 1 times the content of ethanolamine, at 40°C Reaction 3h. Centrifuge at 8000 rpm for 10 min to obtain a precipitate, wash with methanol, and dry in vacuum at 25° C. to obtain zwitterionic functionalized graphene oxide nanosheets.

[0031] (3) Disperse the zwitterionic functionalized graphene oxide nanosheets prepared in step (2) in a deionized aqueous solution at a concentration of 0.2 mg / ml, and disperse polyethyleneimine in a deionized aqueous solution at a concentration of 0.2 mg / ml.

[0032] (4) The solution in step (3) was alternately spin-coated...

Embodiment 2

[0035] (1) Evenly disperse graphene oxide nanosheets in N-N-2-methylformamide at a concentration of 0.5mg / ml, and disperse ethylenediamine and propane sultone in N-N-2-methylformamide respectively In, the concentration is 5mg / ml.

[0036] (2) Take 30ml of graphene oxide solution, add 6ml of ethylenediamine solution with 2 times the content of graphene oxide, react at 60°C for 2h, then add 12ml of propane sultone solution with 2 times the content of ethylenediamine, React at 60°C for 5h. Centrifuge at 12000 rpm for 30 min to obtain a precipitate, wash with ethanol, and dry in vacuum at 50° C. to obtain zwitterion-functionalized graphene oxide nanosheets.

[0037] (3) Disperse the zwitterionic functionalized graphene oxide nanosheets prepared in step (2) in a deionized aqueous solution at a concentration of 0.2 mg / ml, and disperse polyethyleneimine in a deionized aqueous solution at a concentration of 0.2 mg / ml.

[0038] (4) The solution in step (3) was alternately spin-coate...

Embodiment 3

[0041] (1) Graphene oxide nanosheets are uniformly dispersed in 1-methyl-2-pyrrolidone at a concentration of 0.2 mg / ml, and ethanolamine and butyrolactone are respectively dispersed in 1-methyl-2-pyrrolidone at a concentration of 0.2 mg / ml. 2mg / ml.

[0042] (2) Take 30ml of graphene oxide solution, add 12ml of ethanolamine solution with 4 times the content of graphene oxide, react at 50°C for 1h, then add 24ml of butyrolactone solution with 2 times the content of ethanolamine, and react at 50°C for 4h . Centrifuge at 10,000 rpm for 20 min to obtain a precipitate, wash with methanol, and dry in vacuum at 40° C. to obtain zwitterion-functionalized graphene oxide nanosheets.

[0043] (3) the zwitterionic functionalized graphene oxide nanosheets prepared in step (2) are dispersed in methanol aqueous solution, the concentration is 0.3mg / ml, polydiallyldimethylammonium is dispersed in methanol aqueous solution, The concentration is 0.4mg / ml.

[0044] (4) The solution in step (3) wa...

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
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a separation membrane based on zwitterion functionalized graphene oxide and a preparation method of the separation membrane. Zwitterion modified graphene oxide and a polymer alternately spin-coat the surface of a support, and a dense defect-free separation membrane is obtained through layer-by-layer self-assembly. According to the separation membrane, the layered structureof the zwitterion modified graphene oxide and the affinity to water are utilized, so that water molecules are rapidly transported, meanwhile, a stable membrane structure is constructed by utilizing the synergistic effect of the graphene oxide and the polymer, and finally good water selective separation is shown in an alcohol-water separation system. The method disclosed by the invention is simpleand economic in process, high flux and high separation selectivity are realized, the stability of the membrane structure is ensured, the separation efficiency of the membrane is improved, and meanwhile, the separation membrane has universality and good application prospect.

Description

technical field [0001] The invention relates to a separation membrane based on zwitterion-functionalized graphene oxide and a preparation method thereof. The prepared membrane can be used for selective and fast permeation of water in an alcohol-water system. Background technique [0002] Material separation (purification, recovery and recycling) is a vital component in every chemical industry and accounts for the majority of energy, operating and capital costs in industrial production. Therefore, the development of a new high-efficiency and energy-saving separation process is a major direction to achieve "energy saving and emission reduction" in the chemical industry, and is of great significance to the sustainable development of the chemical industry. Compared with traditional separation technologies such as rectification, evaporation, and drying, membrane separation technology is an energy-saving and environmentally friendly separation technology, which has the characteris...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/50B01D71/42B01D71/34B01D71/02B01D69/02B01D67/00
CPCB01D71/42B01D71/50B01D71/34B01D71/021B01D69/02B01D67/0079B01D2325/00
Inventor 金万勤赵静梁凤
Owner NANJING TECH UNIV