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Orientation method of carbon nanotubes in molding process of composite materials

A technology for oriented carbon nanotubes and carbon nanotubes, applied in the field of oriented carbon nanotubes, can solve the problems of inability to guarantee the orientation degree and direction of carbon nanotubes, single orientation method, etc., and achieve finished product quality assurance, simple operation, and high degree of orientation. Effect

Inactive Publication Date: 2012-10-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The existing methods for orienting carbon nanotubes in the composite material forming process are relatively single, and all of them are for the orientation of carbon nanotubes in solution or in resin.
The orientation degree and direction of carbon nanotubes in the finished composite material cannot be guaranteed if the finished product after this orientation is used for composite material processing

Method used

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  • Orientation method of carbon nanotubes in molding process of composite materials
  • Orientation method of carbon nanotubes in molding process of composite materials
  • Orientation method of carbon nanotubes in molding process of composite materials

Examples

Experimental program
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Embodiment 1

[0018] This embodiment provides a method for orienting carbon nanotubes in the composite material forming process, wherein the composite material refers to two or more materials with different physical and chemical properties, which are different in microscopic, mesoscopic or macroscopic, etc. It is a material system formed through complex spatial combination of structural scale and layers. Its performance and function are often far beyond the performance and function of its single component. Composite material molding process refers to resin transfer molding RTM, vacuum assisted resin transfer molding VARTM, vacuum injection molding VARI and other molding processes. The concrete steps of this embodiment are:

[0019] Step 1, disperse: in such as figure 1 In the dispersion and pre-orientation zone 1 shown, carbon nanotubes are dispersed in acetone with a mass percent concentration of 99.5%, ultrasonically treated for 0.5h, then added to the resin, and mechanically dispersed ...

Embodiment 2

[0028] The difference between this embodiment and embodiment 1 is:

[0029] In step 1, the mass percent concentration of acetone is 99.7%, the ultrasonic treatment time is 3h, the mass ratio of carbon nanotubes to acetone is 2:98, and the mass ratio of acetone to resin is 5:95;

[0030] In step 2, the magnetic field strength is 3T, and the action time is 0.5h;

[0031] In step 3, the magnetic field strength is 3T, the injection pressure of the carbon nanotube fluid is controlled at 100kPa, and the action time is 0.5h;

[0032] In step 4, the magnetic field strength is 3T, and the action time is 0.1h.

[0033] The following data can be obtained through the conventional national standard determination test method:

[0034]

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Abstract

The invention provides an orientation method of carbon nanotubes in a molding process of composite materials. The orientation method is characterized by comprising the following steps: step one, dispersion; step two, pre-orientation; step three, re-orientation; and step four, orientation in the molding of the composite materials. According to the orientation method, orientation is performed on the carbon nanotubes in solution or in resin in different molding stages of the composite materials. The orientation method includes the dispersion and the pre-orientation of the carbon nanotubes in the solution or in the resin, the re-orientation before the resin or the solution is led to a molding area of the composite materials, and the orientation in the molding of the composite materials, therefore good orientation degree of the carbon nanotubes (magnetic carbon nanotubes / other magnetic induction particle materials) can be obtained. The orientation method has the advantages that the orientation degree of the carbon nanotubes is high, the orientation method is closely combined with the molding process of the composite materials, the quality of finished products is guaranteed, the operation is simple, and the like.

Description

technical field [0001] The invention relates to a method for orienting carbon nanotubes in a composite material forming process. Background technique [0002] The existing methods for orienting carbon nanotubes in the molding process of composite materials are relatively single, and all of them are for orienting carbon nanotubes in a solution or in a resin. The orientation degree and direction of the carbon nanotubes in the finished composite material cannot be guaranteed if the finished product after such orientation is used to process the composite material. The improvement of the performance (conductivity, mechanical properties, etc.) of the composite material is precisely determined by the degree of orientation of the carbon nanotubes in the composite material. Contents of the invention [0003] The purpose of the present invention is to provide an orientation method for improving the orientation degree of carbon nanotubes in a composite material. [0004] In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/28B29C70/54
Inventor 李炜梁晓宁
Owner DONGHUA UNIV