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Dispersion method of nano material

A nanomaterial and dispersion technology, applied in mixing methods, chemical instruments and methods, dissolution, etc., can solve the problems of uneven dispersion, insignificant dispersion effect of carbon nanomaterials, and backward dispersion equipment.

Pending Publication Date: 2020-10-27
鸿翌科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nanoparticles have high chemical activity, exhibit strong surface effects, and easily aggregate to reach a stable state, so that agglomeration occurs, making it difficult for nanomaterials to give full play to their proper performance.
Moreover, the large specific surface area of ​​nanomaterials, coupled with the fact that the interaction between the sheets is easy to occur, and thus agglomeration is very easy to occur, so when nanomaterials are used to enhance the performance of composite materials, the dispersion problem in the matrix has been facing great challenges, and seriously affects and restricts its application potential as a composite filler
However, most of the dispersing equipment is very backward; there is no shear force at all when dispersing, it is just a kind of stirring, the dispersion effect of carbon nanomaterials is not obvious, and there are still some agglomerations and uneven dispersion, so that the performance of the material cannot be exerted
The chemical dispersion method is currently widely used, mainly to add some surfactants to the nanomaterials to make the materials stable, but due to the addition of other ingredients, changing the formula of the raw materials will have a certain impact on the materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh fullerene and carbon nanotubes according to the mass ratio of 1:0.1, add polyvinylpyrrolidone and chloroform mixed solution, the mass ratio of the mixed solution to the total mass of fullerene and carbon nanotubes is 60 : 1, where the mass fraction of polyvinylpyrrolidone is 2% based on the quality of the mixed solution of polyvinylpyrrolidone and chloroform, and the first mixture is obtained;

[0042] The negative oxygen ions generated by the negative oxygen ion air purifier are directly passed into the closed environment where the mechanical dispersion is located through the collection tube, creating the first negative oxygen ion environment. Based on the volume of the closed space where the mechanical dispersion process is located, pass into The concentration of negative oxygen ions is: 1 thousand / cm 3 ;

[0043] In the first negative oxygen ion environment, use a grinder to grind the first mixture, and then use a magnetic stirrer to stir to obtain a dispersio...

Embodiment 2

[0048] Weigh the fullerene and the carbon nanotube according to the mass ratio of 1:0.5, add the mixed solution of polyvinylpyrrolidone and chloroform to mix, the mass ratio of the mixed solution to the total mass of the fullerene and the carbon nanotube is 80 : 1, based on the quality of the mixed solution of polyvinylpyrrolidone and chloroform, the mass fraction of polyvinylpyrrolidone is 2%, and the first mixture is obtained;

[0049] The negative oxygen ions generated by the negative oxygen ion air purifier are directly passed into the closed environment where the mechanical dispersion is located through the collection tube, creating the first negative oxygen ion environment. Based on the volume of the closed space where the mechanical dispersion process is located, pass into The concentration of negative oxygen ions is: 1 thousand / cm 3 ;

[0050] In the first negative oxygen ion environment, use a grinder to grind the first mixture, and then use a magnetic stirrer to sti...

Embodiment 3

[0055] Weigh the fullerene and the nanowire at a mass ratio of 1:0.5, add a mixed solution of polyvinylpyrrolidone and chloroform to mix, and the mass ratio of the mixed solution to the total mass of the fullerene and the nanowire is 100: 1. Based on the quality of the mixed solution of polyvinylpyrrolidone and chloroform, the mass fraction of polyvinylpyrrolidone is 3%, and the first mixture is obtained;

[0056] The negative oxygen ions generated by the negative oxygen ion air purifier are directly passed into the closed environment where the mechanical dispersion is located through the collection tube, creating the first negative oxygen ion environment. Based on the volume of the closed space where the mechanical dispersion process is located, pass into The concentration of negative oxygen ions is: 5 thousand / cm 3 ;

[0057] In the first negative oxygen ion environment, the first mixture is ground with a grinder, and then stirred with a magnetic stirrer to obtain a dispers...

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Abstract

The invention provides a dispersion method of a nano material. The method comprises the following steps: mixing a nano material with a surfactant to obtain a first mixture; mechanically dispersing thefirst mixture in a first negative oxygen ion environment to obtain a first dispersion; and in a second negative oxygen ion environment, carrying out ultrasonic dispersion on the first dispersion to obtain a second dispersion. According to the invention, the dispersion method belongs to a physical dispersion method, is rapid, safe and efficient, avoids the problem that other components are added in a chemical dispersion method to influence the nano material, and does not influence the function exertion of each component and the overall performance of the composite material; and mechanical dispersion and ultrasonic dispersion are adopted at the same time, and negative oxygen ions are added in different stages in a dispersion process to form a negative oxygen ion environment, so that the dispersion efficiency is improved, the dispersion difficulty is reduced, the dispersion effect is improved, and the preparation time cost is remarkably saved.

Description

technical field [0001] The invention relates to the technical field of nano-dispersion, in particular to a nano-material dispersion method. Background technique [0002] When nanomaterials are applied to polymer-based composites, the method of solution blending is generally used for compounding. Therefore, it is necessary to prepare a stable and uniform nanomaterial dispersion first, and then compound with polymers to prepare composite materials with excellent properties. However, after the particles are refined to the nanometer level, a large amount of positive and negative charges are accumulated on the surface, and the shape of the nanoparticles is extremely irregular, which causes the accumulation of charges. The proportion of surface atoms of nanoparticles increases rapidly with the decrease of nanoparticle size. When it is reduced to 1nm, the proportion of surface atoms is as high as 90%. high surface energy. Nanoparticles have high chemical activity, exhibit strong ...

Claims

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Application Information

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IPC IPC(8): B01F3/12B01F3/00B01F23/00
CPCB01F23/09B01F23/51B01F23/59
Inventor 林伟华徐冬
Owner 鸿翌科技有限公司
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