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A method to improve the dispersion of graphene in polymer matrix

A graphene and polymer technology, applied in the field of improving the dispersibility of graphene in a polymer matrix, can solve the problems of weakening some properties of materials, requiring organic solvents, low efficiency, etc., achieving excellent comprehensive performance, easy access to equipment, Equipment simple effect

Inactive Publication Date: 2017-09-01
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these modification methods, organic chemical reactions are involved, which have disadvantages such as time-consuming, low efficiency, and the need for organic solvents.
At the same time, studies have shown that the introduction of a third component such as a compatibilizer can also effectively weaken the agglomeration of graphene in the matrix, but the third component may weaken some of the properties of the material.
[0005] It can be seen that there is still a lack of an efficient, green and environmentally friendly method for improving the dispersion of graphene nanomaterials in polymer matrices in the prior art.

Method used

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  • A method to improve the dispersion of graphene in polymer matrix
  • A method to improve the dispersion of graphene in polymer matrix
  • A method to improve the dispersion of graphene in polymer matrix

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Embodiment 1

[0041] Aluminum trichloride (AlCl 3 ) as a catalyst was added to the melt blending system of isotactic polypropylene (PP) and thermally reduced graphene (TrG) to prepare a PP / TrG composite material masterbatch with a high content of TrG. After extraction, the catalyst in the masterbatch was removed, and then the masterbatch was blended with PP to obtain a PP / TrG composite material with a lower TrG content. The specific raw materials and their weight ratios are shown in Table 1.

[0042] The specific preparation method is as follows:

[0043] The first step, at first prepare raw materials by above-mentioned components;

[0044] In the second step, the isotactic PP and thermally reduced graphene (TrG) were dried in an oven at 60°C for 12 hours;

[0045] Then, put the isotactic PP and TrG obtained in the second step into the torque rheometer for banburying and mixing for 2 minutes, and then add AlCl 3 Add it into the blending system and mix for 10 minutes, the processing tempe...

Embodiment 2-13

[0069] The raw materials of embodiment 2-13 and their weight ratio are shown in table 1, and its preparation method is the same as embodiment 1.

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Abstract

The invention provides a method for improving the dispersion of graphene in a polymer matrix, that is, firstly, polymer, graphene and a Lewis acid catalyst are melt-mixed with a component ratio of 100: 3-10: 0.1-2 to obtain a polymer / Graphene composite material masterbatch. Afterwards, the Lewis acid was removed, and the prepared masterbatch was mixed with a polymer to obtain a nanocomposite material with a lower graphene content. Compared with the polymer / graphene composite obtained without Lewis acid catalyst treatment, the obtained polymer / graphene composite has a more uniform dispersion of graphene in the former polymer matrix, significantly reduced aggregates, and more uniform dispersion. It helps to further improve the thermo-oxidative stability of the composite material.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, in particular to a method for improving the dispersibility of graphene in a polymer matrix. Background technique [0002] In 2004, Professor Andre Geim of the University of Manchester in the UK and his student Kostya Novoselov used graphite as a raw material to separate for the first time a two-dimensional carbon material composed of a layer of carbon atoms—graphene. The theory that 2D crystalline materials cannot exist stably has aroused widespread concern throughout the world. Graphene is a new type of two-dimensional honeycomb carbon material with a single layer of carbon atoms arranged in a hexagonal lattice. The thickness of a single layer of graphene is only 0.34nm, which is the thinnest material among known materials so far. It is precisely because of this unique structure that graphene has many excellent properties, such as ultra-high Young's modulus (about 1TPa), ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L77/06C08L77/02C08L23/06C08L23/12C08K3/04C08J3/22C08J3/00
Inventor 黄亚江杨俊龙李光宪瞿研
Owner SICHUAN UNIV