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Preparation method and application of functionalized nano composite membrane

A nano-composite and functionalized technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of low mechanical properties, easy agglomeration, weak removal performance of heavy metal ions, etc., to improve hydrophilicity and efficient separation and removal. Effect

Active Publication Date: 2019-09-20
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a method for preparing functionalized nanocomposite membranes, in view of the current problems of ultrafiltration membranes such as weak removal of heavy metal ions, low mechanical properties, and easy agglomeration. Tubes are added to the membrane material as an additive, which can not only solve the problem of easy agglomeration and difficult separation of nanomaterials, but also improve the mechanical properties of the nanocomposite membrane, and enable the prepared nanocomposite membrane to have the ability to remove heavy metal ions

Method used

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  • Preparation method and application of functionalized nano composite membrane
  • Preparation method and application of functionalized nano composite membrane
  • Preparation method and application of functionalized nano composite membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Step 1: Weigh 1 g of multi-walled carbon nanotubes and place them in 25% HNO 3 The solution was refluxed at 70° C. for 3 hours to obtain acidified multi-walled carbon nanotubes.

[0028] Step 2: Weigh 35 mg of acidified multi-walled carbon nanotubes and add them to 50 mL of water. First add 0.25 g of carbodiimide (EDC) and 0.5 g of N-carboxysuccinimide (NHS). After ultrasonication in a water bath for 1 hour, add 50 mg of polyethyleneimine (PEI) was taken out after 24 hours of magnetic stirring at room temperature. Centrifuge at 1000rpm for 10min, pour off the supernatant, add deionized water and centrifuge again at 1000rpm for 10min. The above operation was repeated three times, and then the obtained solid was dried in a vacuum oven for 10 h to obtain functionalized multi-walled carbon nanotubes.

[0029] Step 3: Weigh 2.1g of polyacrylonitrile and add it to 27.9g of N'N-dimethylformamide solution. After dissolving with magnetic stirring at 50°C, add 3.5wt% of the pol...

Embodiment 2

[0033] The difference from Example 1 is that in step 2, the mass of acidified multi-walled carbon nanotubes is 40 mg, and the mass of polyethyleneimine (PEI) is 50 mg.

[0034] The rest are the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0036] The difference from Example 1 is that in Step 2, the mass of acidified multi-walled carbon nanotubes is 30 mg, and the mass of polyethyleneimine (PEI) is 50 mg.

[0037] The rest are the same as in Embodiment 1, and will not be repeated here.

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Abstract

The invention belongs to the technical field of nano composite membrane polymer material production, and particularly relates to a preparation method and application of a functionalized nano composite membrane. The preparation method includes: acidifying a multiwall carbon nanotube; adding the acidified multiwall carbon nanotube into water, adding carbodiimide and N-carboxysuccinimide, and performing water bath ultrasound treatment; adding a functionalizing reagent, and taking out after magnetic stirring; centrifuging, and drying to obtain a functionalized multiwall carbon nanotube; adding hydrophilic polymer into a N' N-dimethylformamide solution, magnetically stirring, adding the functionalized multiwall carbon nanotube, and stirring; ultrasonically cooling to obtain a static spinning solution; spinning the static spinning solution to obtain a fiber membrane; hot pressing the fiber membrane, and drying to obtain the nano composite membrane. By the preparation method, the problem that a nano material is easy in agglomeration and difficult in separation can be solved, mechanical performance of the nano composite membrane can be improved, and the nano composite membrane prepared by the method can remove heavy metal ions.

Description

technical field [0001] The invention belongs to the technical field of production of nanocomposite membrane polymer materials, and in particular relates to a preparation method and application of a functionalized nanocomposite membrane. Background technique [0002] In recent years, with the rapid development of the country's industry, the high concentration of heavy metal ions contained in the discharged industrial wastewater has caused serious pollution to the water environment. Heavy metal ions are highly toxic and can cause serious harm to the human body even at low concentrations. At the same time, because heavy metals cannot be degraded by microorganisms, they tend to produce higher toxicity along with the enrichment of the food chain, so it is of great practical significance to solve the pollution of heavy metals in water bodies. [0003] The removal methods of heavy metal ions mainly include chemical precipitation, adsorption, ion exchange, membrane separation, elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F6/50D01F6/52D01F6/46D01F6/94D01F1/10D04H1/728D01D5/00B01D69/12B01D69/02B01D67/00C02F1/44C02F1/28C02F101/20
CPCD01F6/54D01F6/50D01F6/52D01F6/46D01F6/94D01F1/10D04H1/728D01D5/0007D01D5/0038D01D5/0061B01D69/12B01D69/02B01D67/0079C02F1/44C02F1/283B01D2325/24B01D2325/36B01D2325/12C02F2101/20
Inventor 刘新会邓圣林欣廖建波
Owner DONGGUAN UNIV OF TECH