Polyacrylonitrile/polyethyleneimine/graphene oxide nano porous sponge and preparation method thereof

A polyethylene imine and polyacrylonitrile technology, applied in chemical instruments and methods, water/sludge/sewage treatment, alkali metal oxides/hydroxides, etc., can solve problems such as brittleness, brittleness, and poor strength , to achieve the effect of excellent adsorption performance

Inactive Publication Date: 2019-05-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor strength, brittleness and brittleness of polyethyleneimine (PEI) electrospun nanofiber adsorption materials, the present invention proposes a simple and effective preparation method, and obtains a fluffy, soft and good resilience , Polyacrylonitrile / polyethyleneimine / graphene oxide nanoporous sponge material with high adsorption capacity

Method used

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  • Polyacrylonitrile/polyethyleneimine/graphene oxide nano porous sponge and preparation method thereof
  • Polyacrylonitrile/polyethyleneimine/graphene oxide nano porous sponge and preparation method thereof
  • Polyacrylonitrile/polyethyleneimine/graphene oxide nano porous sponge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 10g of PAN to 90g of DMF, stir and dissolve at 50°C, cool to room temperature, add 10g of PEI, keep stirring at room temperature for 2 hours, then raise the temperature to 100°C within 0.5 hours, and then heat treatment for 0.5 hours, the polyethyleneimine Part of the amino group is connected with the cyano group on the polyacrylonitrile chain, and then cooled to room temperature to obtain a homogeneous and transparent polyacrylonitrile / polyethyleneimine solution; at 25 ° C, relative air humidity of 10%, and spinning voltage of 10 kV , continuous spinning for 2 hours to obtain a PAN / PEI bicomponent nanofiber membrane, which was dried for later use.

[0036] Weigh 10g of nanofiber membrane, cut the membrane into a square of about 0.5cm, put it into a beaker filled with 500g of distilled water and 5g of graphene oxide, start the high-speed homogeneous mixer with a dispersion speed of 8000rpm to disperse for 0.5h, and make the fiber membrane in water Form a uniform dis...

Embodiment 2-7

[0039] Add 10g of PAN to 90g of DMF, stir and dissolve at 50°C, cool to room temperature, add PEI with mass of 20g, 30g, 40g, 50g, 100g, 500g respectively, keep stirring at room temperature for 2 hours, and then raise the temperature to Heat at 100°C for another 0.5 hour to connect some of the amino groups of polyethyleneimine to the cyano groups on the polyacrylonitrile chain, and then cool to room temperature to obtain a homogeneous and transparent polyacrylonitrile / polyethyleneimine solution. Under the conditions of 25° C., relative air humidity of 10%, and spinning voltage of 10 kV, continuous spinning was performed for 2 hours to obtain a PAN / PEI bicomponent nanofiber membrane, which was dried for later use.

[0040] Prepare PAN / PEI / graphene oxide nanoporous sponge according to the method described in Example (1), and investigate the adsorption performance according to Example 1.

Embodiment 8-11

[0042] Prepare PAN / PEI two-component nanofiber membrane according to the method described in Example 5, and dry it for later use.

[0043] Weigh 10g of fiber film, cut the film into a square of about 0.5cm, put it into a beaker filled with 500g of distilled water and graphene oxide with a mass of 6g, 8g, 10g, and 12g, and start a high-speed homogeneous mixer to disperse for 0.5h, so that The fiber film forms a uniform dispersion in water, cools at minus 50°C for 1 hour, then puts it in a freeze dryer, and vacuum-dries it for 24 hours. After taking out the freeze-dried product, heat it at 120°C for 1 hour to obtain PAN / PEI / graphene oxide Nanoporous sponge.

[0044] According to the method described in Example 1, the adsorption performance of the porous sponge was investigated.

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Abstract

The invention discloses polyacrylonitrile/polyethyleneimine/graphene oxide nano porous sponge and a preparation method thereof, and belongs to the technical field of adsorption material preparation. Polyacrylonitrile (PAN), polyethyleneimine (PEI)) and graphene oxide as starting materials are subjected to electrostatic spinning and freeze-drying processes to obtain a porous adsorption sponge material with the PAN (polyacrylonitrile) as a skeleton, the PEI as an adsorbent and a cross-linking agent and the graphene oxide as a reinforcing component. Through the electrostatic spinning technology,the surface of the PAN/PEI double-component nanofiber film is smooth, flat, soft and fluffy. The low-density PAN/PEI porous sponge with good rebound resilience is obtained through the freeze-drying technology. The nano-scale ion exchange fiber prepared by the preparation method is formed by stacking polyacrylonitrile nano-fiber with uniform size, and has excellent adsorption performance to metal ions and organic dyes.

Description

technical field [0001] The invention belongs to the technical field of adsorption material preparation, and in particular relates to a polyacrylonitrile / polyethyleneimine / graphene oxide nanoporous sponge and a preparation method thereof. The nanoporous sponge material can be used for adsorption treatment of pollutants in water. Background technique [0002] Metal mines, non-ferrous smelting, steel, electrolysis, electroplating, petrochemicals, batteries, leather, pesticides, paints, medicines, pigments, circuit boards, aviation equipment, textiles, etc. are key industries that have an important impact on the national economy. Production will inevitably produce a large amount of industrial wastewater containing heavy metals and dyes. Once discharged into rivers and other water bodies, whether it is directly drunk or enriched through the food chain and enters the human body, many serious diseases will occur. The advanced treatment of industrial wastewater and domestic water is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
Inventor 杨清彪屈德辉宋岩王书刚任晶薛龙启李耀先
Owner JILIN UNIV
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