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Functionalized grapheme/superparamagnetic ferroferric oxide nano particle composite material and preparation method thereof

A technology of ferroferric oxide and superparamagnetism, which is applied to the magnetism of organic materials/organic magnetic materials, iron oxide/iron hydroxide, nanotechnology, etc., can solve the problems of difficult modification of functional groups and weak hydrophilicity, and achieve Strong external magnetic field response, good durability, good dispersion effect

Inactive Publication Date: 2014-02-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the existing graphene / ferric oxide superparamagnetic nanocomposite material with weak hydrophilicity and difficult to modify the technical problems of functional groups, and to provide a functionalized graphene / superparamagnetic ferric oxide nanoparticle Composite material and its preparation method

Method used

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  • Functionalized grapheme/superparamagnetic ferroferric oxide nano particle composite material and preparation method thereof
  • Functionalized grapheme/superparamagnetic ferroferric oxide nano particle composite material and preparation method thereof
  • Functionalized grapheme/superparamagnetic ferroferric oxide nano particle composite material and preparation method thereof

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preparation example Construction

[0029] In the preparation method of the above-mentioned functionalized graphene, the aqueous solution of the polymer can be obtained commercially, wherein, the average molecular weight of polyacrylamine is 15,000, and the average molecular weight of polyacrylic acid is 240,000; the centrifugation and washing process can be carried out at 15,000 rpm. Centrifuge at low speed and rinse with deionized water.

[0030] When the functionalized graphene is polyethyleneimine functionalized graphene, its preparation is a prior art (Nanoscale, 2013, 5, 663–670).

[0031] As a preferred version, the preparation method of polyallylamine functionalized graphene:

[0032] (1) Add an aqueous solution of polypropylene amine (the average molecular weight of polypropylene amine is 15000) to the GO dispersion, add hydrazine hydrate, and ultrasonically stir at room temperature for 20min-1h to obtain the mixture;

[0033] The mass ratio of described polypropylene amine, graphene oxide and hydrazin...

Embodiment 1

[0059] Preparation of polyallylamine functionalized graphene:

[0060] Add 2.4mL of 58mg / mL polyallylamine aqueous solution (the average molecular weight of polyallylamine is 15000) to 40mL of 0.4mg / mL uniform GO dispersion, add 160μL of hydrazine hydrate, and ultrasonically stir at room temperature for 30min, the resulting mixture React at 140° C. for 4 hours to obtain a black solution. Centrifuge the black solution at a speed of 15,000 rpm and rinse it with deionized water three times to remove excess polyallylamine in the solution to obtain polyallylamine functionalized graphene.

Embodiment 2

[0062] Preparation of polyacrylic acid functionalized graphene:

[0063] Add 3.5mL of 25wt% polyacrylic acid aqueous solution (density 1.09g / mL, average molecular weight of polyacrylic acid is 240000) to 40mL of 0.4mg / mL uniform GO dispersion, add 160μL of hydrazine hydrate, and stir at room temperature for 20min, the resulting mixture React at 140°C for 4 hours to obtain a black solution product. The black solution was centrifuged at a speed of 15,000 rpm and washed three times with deionized water to remove excess polyacrylic acid in the solution to obtain polyacrylic acid functionalized graphene.

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Abstract

The invention discloses a functionalized grapheme / superparamagnetic ferroferric oxide nano particle composite material and a preparation method of the functionalized grapheme / superparamagnetic ferroferric oxide nano particle composite material, and belongs to the technical field of grapheme magnetic composite materials. The functionalized grapheme / superparamagnetic ferroferric oxide nano particle composite material solves the technical problems that a grapheme / superparamagnetic ferroferric oxide nano particle composite material is poor in hydrophilia and can not modify a functional group easily in the prior art. According to the composite material, superparamagnetic ferroferric oxide nano particles are loaded on the surface of functionalized grapheme, the diameter of the particles is smaller than 30nm, and the functionalized grapheme is polyacrylamide functionalized grapheme, or polyacrylic acid functionalized grapheme, or polymine functionalized grapheme, or tween-20 functionalized grapheme. Not only is the diameter of the particles smaller than 30nm, but also the composite material has the superparamagnetic characteristic and the strong external magnetic field correspondence, can be dispersed in a water solution excellently, and can further modify biological giant molecules.

Description

technical field [0001] The invention relates to a functionalized graphene / superparamagnetic ferric oxide nanoparticle composite material and a preparation method thereof, belonging to the technical field of graphene magnetic composite materials. Background technique [0002] Superparamagnetic Fe3O4 nanoparticles have the advantages of no coercive force and remanence at room temperature, non-toxic, metabolizable in vivo, and good controllability under magnetic field. Graphene, a single-layer structure of carbon atoms bonded by sp2 hybrid orbitals, has high electrical conductivity, high specific surface area, unique graphitized planar structure, and low cost. Graphene nanocomposites formed by graphene and nanomaterials have the advantages of both graphene and functional nanomaterials, making them exhibit exceptional performance in sensing, catalysis, electrical, magnetic, and optoelectronic properties. Among them, graphene / ferroferric oxide superparamagnetic nanocomposites ar...

Claims

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Application Information

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IPC IPC(8): H01F1/42C01G49/08B82Y30/00
Inventor 吕召梓张立兵汪尔康
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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