Method for improving dispersibility 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: 2016-03-16
SICHUAN UNIV +1
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  • 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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  • Method for improving dispersibility of graphene in polymer matrix
  • Method for improving dispersibility of graphene in polymer matrix
  • Method for improving dispersibility of graphene in polymer matrix

Examples

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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 dispersibility of graphene in a polymer matrix. The method comprises the following steps: fusing and mixing a polymer, graphene and a Lewis acid catalyst according to a ratio of 100: 3-10: 0.1-2 so as to obtain polymer / graphene composite material master batch; and then removing the Lewis acid and mixing the prepared master batch with the polymer so as to obtain a nanocomposite with low graphene content. Compared with a polymer / graphene composite material prepared without treatment with the Lewis acid catalyst, the polymer / graphene composite material obtained in the invention has the following advantages: dispersion of graphene in the polymer matrix is more uniform; aggregate is obviously reduced; and more uniform dispersion of graphene is beneficial for further improvement of thermal 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 United Kingdom 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, breaking the two-dimensional carbon material that the physics community has always believed. The theory that three-dimensional crystal 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(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
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