Functionalized polyethylenimine-grafted porous nano-fiber adsorption material and preparation thereof

A polyethyleneimine, nanofiber technology, applied in the direction of fiber type, fiber treatment, inorganic chemistry, etc., can solve the problems of easy pulverization adsorption performance, poor adsorption and desorption cycle stability, etc., to achieve excellent adsorption performance, excellent The effect of adsorption-desorption cycle stability and rich pore structure

Inactive Publication Date: 2017-07-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of functionalized polyethyleneimine grafted porous nanofiber adsorption material to solve the problem that the above-mentioned granular porous materials are easy to pulverize and have stable adsorption performance and adsorption-desorption cycle during use. sexual problems

Method used

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  • Functionalized polyethylenimine-grafted porous nano-fiber adsorption material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A functionalized polyethyleneimine grafted porous nanofiber adsorption material comprises porous polyacrylonitrile nanofibers, and the porous polyacrylonitrile nanofibers are hydrolyzed and then grafted with functionalized polyethyleneimine.

[0029] The preparation method of the functionalized polyethyleneimine grafted porous nanofiber adsorption material is:

[0030] At room temperature of 25°C, 2.4g of polyacrylonitrile and 4.5g of polyvinylpyrrolidone were dissolved in 23.1g of N,N-dimethylformamide with stirring at 500r / min in a stirred tank, and stirred for 14h to obtain a mass fraction of 23 % electrospinning raw material (8% polyacrylonitrile / 15% polyvinylpyrrolidone), the electrospinning raw material obtained is joined in the electrospinning device, is 25kV at static voltage, and syringe pump flow rate 2mL / h, spinneret distance Electrospinning was carried out under the condition that the distance from the receiving screen was 23 cm, and a polyacrylonitrile / poly...

Embodiment 2

[0036] A functionalized polyethyleneimine grafted porous nanofiber adsorption material comprises porous polyacrylonitrile nanofibers, and the porous polyacrylonitrile nanofibers are hydrolyzed and then grafted with functionalized polyethyleneimine.

[0037] The preparation method of the functionalized polyethyleneimine grafted porous nanofiber adsorption material is:

[0038]At room temperature 25°C, 2.4g polyacrylonitrile and 5.4g polyvinylpyrrolidone were stirred and dissolved in 22.2g N,N-dimethylformamide in a stirred tank at 800r / min, and stirred for 18h to obtain a mass fraction of 26 % electrospinning raw material (8% polyacrylonitrile / 18% polyvinylpyrrolidone), the electrospinning raw material obtained is joined in the electrospinning device, the static voltage is 28kV, the flow rate of the syringe pump is 2.2mL / h, the spinneret Electrospinning was carried out at a distance of 24 cm from the receiving screen to obtain a polyacrylonitrile / polyvinylpyrrolidone composite ...

Embodiment 3

[0044] A functionalized polyethyleneimine grafted porous nanofiber adsorption material comprises porous polyacrylonitrile nanofibers, and the porous polyacrylonitrile nanofibers are hydrolyzed and then grafted with functionalized polyethyleneimine.

[0045] The preparation method of the functionalized polyethyleneimine grafted porous nanofiber adsorption material is:

[0046] At a room temperature of 25°C, 3g of polyacrylonitrile and 3g of polyacrylamide were dissolved in 24g of dimethyl sulfoxide in a stirred tank at 1200r / min, and stirred for 24h to obtain an electrospinning raw material with a mass fraction of 20% (10 % polyacrylonitrile / 10% polyacrylamide), the electrospinning raw material obtained is joined in the electrospinning device, under the condition that the static voltage is 30kV, the flow rate of the injection pump is 2mL / h, and the distance between the spinneret and the receiving screen is 25cm Electrospinning is carried out to obtain polyacrylonitrile / polyacry...

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Abstract

The invention provides a functionalized polyethylenimine-grafted porous nano-fiber adsorption material and preparation thereof. The functionalized polyethylenimine-grafted porous nano-fiber adsorption material is characterized by being prepared from porous polyacrylonitrile nano-fibers; the porous polyacrylonitrile nano-fibers are grafted with functionalized polyethylenimine after being hydrolyzed. After the porous polyacrylonitrile nano-fiber material is subjected to graft modification by using the functionalized polyethylenimine, the carbon dioxide adsorption performance and adsorption and desorption cycling stability of the porous polyacrylonitrile nano-fiber material are greatly improved; therefore, the porous nano-fiber high-efficient adsorption material with certain flexibility and strength can be prepared, and has great utilization potentiality in the field of adsorption.

Description

technical field [0001] The invention relates to a preparation method of a functional polyethyleneimine grafted porous nanofiber adsorption material, in particular to a preparation method of a porous nanofiber material with carbon dioxide adsorption performance. Background technique [0002] The annual increase of carbon dioxide emissions has resulted in increasingly serious global warming, which poses a serious threat to the current and future global ecological environment. Therefore, it is of great significance to develop efficient carbon dioxide adsorption materials. With the continuous development of carbon dioxide capture technology, solid adsorbent materials have attracted extensive attention due to their excellent adsorption capacity and high selectivity, and have become one of the research hotspots in the field of carbon dioxide capture and storage. [0003] Porous carbon material has the advantages of high specific surface area, rich pore structure, stable chemical a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30D06M15/61D01F11/06B01D53/02D06M101/28
CPCB01D53/02B01D2257/504B01J20/264B01J20/28023D01F11/06D06M15/61D06M2101/28Y02C20/40
Inventor 王先锋张宇菲关霁铭丁彬俞建勇
Owner DONGHUA UNIV
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