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Method for efficiently dispersing graphene into polymer

A polymer and graphene technology, applied in the field of nanocomposite material preparation, achieves the effects of less pollution, simple preparation process and high product quality

Active Publication Date: 2017-12-01
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem of partial agglomeration of graphene still existing in the prior art using a mixer, the present invention proposes a method for efficiently dispersing graphene in polymers

Method used

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  • Method for efficiently dispersing graphene into polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mix graphene and SBS polymer at a mass ratio of 1:2, add it to the mixer, and control the working temperature to 120 ° C. During the rotation process, the graphene is dispersed in the polymer, and the graphene is in the polymer. It is continuously compressed and sheared, and by mixing, a homogeneous graphene mixture is formed;

[0029] (2) adding cross-linking agent hydrogen peroxide to the homogeneous graphene mixture obtained in step (1), the quality of the cross-linking agent is 1% of the polymer, and the mixing is uniform in the internal mixer, and then the mixing is carried out. Press the sheet by machine, and further stretch it into a sheet on a biaxial stretching machine. The thickness of the sheet is 0.005mm. By stretching the elastic polymer, the graphene is further subjected to the stretching force until the sheet is split, and the overlapping part of the graphene is stretched and dispersed. open, then knead;

[0030] (3) The graphene-dispersed polymer pe...

Embodiment 2

[0033] (1) Mix graphene and polymer PS at a mass ratio of 1:3, add it to the mixer, and control the working temperature to be 170 ° C. During the rotation process, the graphene is dispersed in the polymer, and the graphene is in the polymer. It is continuously compressed and sheared, and by mixing, a homogeneous graphene mixture is formed;

[0034] (2) adding the cross-linking agent cumene to the homogeneous graphene mixture obtained in step (1), the quality of the cross-linking agent is 3% of the polymer, and the mixing is uniform in the internal mixer, and then the Machine press, and further stretch it into a thin sheet on a biaxial stretching machine, keeping the polymer at an ambient temperature of 100-150 ° C, it is necessary to ensure that the polymer does not break, and the thickness of the sheet after stretching is 0.01 mm; The stretch elastic polymer makes the graphene further bear the stretching force, and the overlapping part of the graphene is stretched and dispers...

Embodiment 3

[0037] (1) Mix graphene and polymer EVA at a mass ratio of 1:5, add to the mixer, and control the working temperature to 80 ° C. During the rotation process, the graphene is dispersed in the polymer, and the graphene is in the polymer. It is continuously compressed and sheared, and by mixing, a homogeneous graphene mixture is formed;

[0038] (2) adding a cross-linking agent aldehyde to the homogeneous graphene mixture obtained in step (1), the quality of the cross-linking agent is 5% of the polymer, and it is uniformly mixed in an internal mixer, and then the mixer is pressed. The sheet is further stretched into a sheet on a biaxial stretching machine. After the stretching is completed, the thickness of the sheet is 0.005 mm; by stretching the elastic polymer, the graphene is further subjected to the stretching force, and the overlapping part of the graphene is stretched and dispersed. , and then knead;

[0039] (3) Graphene-dispersed polymer pellets are obtained by repeatedly...

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Abstract

The invention provides a method for efficiently dispersing graphene into a polymer. The method includes the steps that a large amount of the graphene is directly mixed with the polymer at first, and the graphene is pre-dispersed into the polymer; then stretching is performed on a two-way stretching machine to form a sheet (stretching is based on the maximum extension ratio), the graphene is stretched and dispersed in the stretching process, stretching is conducted repeatedly for 3-5 times, the graphene is overlapped, reunion points are forcefully dispersed into the polymer, and extrusion pelletizing is conducted after kneading to obtain polymer particles with the graphene being dispersed; and the polymer particles are generally used in the polymer as a master batch. The method is simple, high in efficiency and suitable for large-scale preparation of the high-dispersion graphene polymer on existing mature equipment.

Description

technical field [0001] The invention relates to the technical field of nanocomposite material preparation, in particular to a method for efficiently dispersing graphene in polymers. Background technique [0002] With the development of nanotechnology, the composite of polymers and nanomaterials has become a hot spot in the field of material enhancement and modification. Add nanomaterials to high molecular polymers by physical and mechanical methods, so as to reduce the cost of materials, improve the molding processing performance or end-use performance, or make the materials all on the surface, as well as electricity, magnetism, light, heat, sound, combustion, etc. and other aspects to give unique functions and other effects. [0003] Graphene is a planar carbon nanomaterial composed of a layer of carbon atoms. It is the thinnest two-dimensional material known so far, with a thickness of only 0.335nm. It consists of a hexagonal lattice. Graphene is the thinnest and hardest...

Claims

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Application Information

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IPC IPC(8): B29C55/12B29B9/06B29B7/28C08K7/00C08K3/04C08L53/02C08L25/06C08L23/08
CPCB29B7/28B29B9/06B29C55/12C08K3/04C08K7/00C08L53/02C08L25/06C08L23/0853C08L23/0869
Inventor 陈庆曾军堂陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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