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Multiwalled carbon nanotubes-polyether sulfone composite filter membrane as well as preparation method and application thereof

A technology of multi-walled carbon nanotubes and polyethersulfone, applied in the field of material chemistry, can solve the problems of undiscovered pigment detection, etc., and achieve the effect of simple operation and cost saving

Inactive Publication Date: 2013-10-16
BEIJING CENT FOR PHYSICAL & CHEM ANALYSIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the application of MWCNTs as an adsorption matrix for the detection of pigments in samples.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 Preparation of multi-walled carbon nanotube-polyethersulfone composite filter membrane

[0030] The preparation of multi-walled carbon nanotube-polyethersulfone composite filter membrane comprises the following steps:

[0031] 1) Uniformly disperse 10 g of multi-walled carbon nanotubes in 30 mL of butyl acetate (analytical pure) to form a dispersion system.

[0032] 2) Use polyethersulfone as the membrane substrate, polyethylene glycol 400 as the pore-forming agent, and N,N-dimethylformamide as the solvent to prepare the membrane-making solution. The mass percentage of membrane-forming solution: polyethersulfone 15%, polyethylene glycol 400 4%, N,N-dimethylformamide 81%.

[0033] 3) Composite film preparation by phase inversion method: add 1) multi-walled carbon nanotube-butyl acetate dispersion liquid to the film-making solution, stir evenly, scrape the film on the glass plate with a QXG scraper, and evaporate the solvent after film formation 5 minutes, ...

Embodiment 2

[0035] Embodiment 2 Preparation of multi-walled carbon nanotube-polyethersulfone composite membrane

[0036] The preparation of multi-walled carbon nanotube-polyethersulfone composite filter membrane comprises the following steps:

[0037] 1) Uniformly disperse 5g of multi-walled carbon nanotubes in 30mL of butyl acetate (analytical grade) to form a dispersion system.

[0038] 2) Use polyethersulfone as the membrane substrate, polyethylene glycol 600 as the pore-forming agent, and N,N-dimethylformamide as the solvent to prepare the membrane-making solution. The mass percentage of membrane-forming solution: polyethersulfone 8%, polyethylene glycol 600 1%, N,N-dimethylformamide 91%.

[0039]3) Composite film preparation by phase inversion method: add 1) multi-walled carbon nanotube-butyl acetate dispersion liquid to the film-making solution, stir evenly, scrape the film on the glass plate with a QXG scraper, and evaporate the solvent after film formation 1min, then placed in w...

Embodiment 3

[0041] Example 3 Preparation of multi-walled carbon nanotube-polyethersulfone composite membrane

[0042] The preparation of multi-walled carbon nanotube-polyethersulfone composite filter membrane comprises the following steps:

[0043] 1) Uniformly disperse 15g of multi-walled carbon nanotubes in 30mL of butyl acetate (analytical grade) to form a dispersion system.

[0044] 2) Use polyethersulfone as the membrane substrate, polyethylene glycol 800 as the pore-forming agent, and N,N-dimethylformamide as the solvent to prepare the membrane-making solution. The mass percent of membrane-forming solution: 20% polyethersulfone, 6% polyethylene glycol 800, and 74% N,N-dimethylformamide.

[0045] 3) Composite film preparation by phase inversion method: add 1) multi-walled carbon nanotube-butyl acetate dispersion liquid to the film-making solution, stir evenly, scrape the film on the glass plate with a QXG scraper, and evaporate the solvent after film formation After 3 minutes, put ...

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Abstract

The invention relates to a multiwalled carbon nanotubes-polyether sulfone composite filter membrane as well as a preparation method and an application thereof. The preparation method comprises the following steps of: dispersing multiwalled carbon nanotubes in butyl acetate to form a disperse system; then, on the basis of taking polyether sulfone as a membrane base material, adding a pore-forming agent and N,N-dimethylformamide to form a membrane-forming solution; adding the disperse system in the membrane-forming solution, stirring, and then wiping a membrane on a glass plate; after membrane-forming, evaporating an organic solvent, then placing in water, fishing out and airing, thereby obtaining the multiwalled carbon nanotubes-polyether sulfone composite filter membrane. The composite filter membrane disclosed by the invention is applied to screening for inedible pigments in foods, and used for adsorbing illegally-added pigments in the foods while filtering matrix ingredients in the foods; the pigments are eluted via proper elution solution, and HPLC (high performance liquid chromatography) measurement is performed. The result indicates that the method is simple to operate, rapid and accurate, and capable of repeatedly utilizing the composite filter membrane, thus saving the cost.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to a multi-walled carbon nanotube-polyethersulfone composite filter membrane, its preparation method and application. Background technique [0002] Membrane technology based on membrane pore separation effect has been applied in many fields of science and engineering because of its simple operation, no phase change in the process, and stable operation. Fill the film with Al 2 o 3 、TiO 2 , Fe 3 o 4 and other functional nanoparticles to prepare composite membranes. Membrane technology combined with the adsorption, catalysis, and magnetic properties of nanoparticles has been applied in industrial wastewater treatment, medicine and other fields, and has shown great advantages. [0003] Multi-walled carbon nanotubes (MWCNTs) are a carbonaceous nanomaterial discovered by Japanese scientist S.Iijiama in 1991. This material is a carbon multilayer tubular structure with nanometer dime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/12B01D67/00G01N30/06
Inventor 范筱京何亚荟贾丽杨志超储晓刚郭浩南潘灿平
Owner BEIJING CENT FOR PHYSICAL & CHEM ANALYSIS