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Process for preparing rare earth modified carbon nanotube/polyimide composite materials

A carbon nanotube and polyimide technology, which is applied in the field of composite material preparation, can solve the problems of reducing the effective aspect ratio of carbon nanotubes, the enhancement effect of carbon nanotubes is deteriorated, and it is difficult to effectively bond, etc. The effect of tribological and mechanical properties, low cost, and improved impact wear resistance

Inactive Publication Date: 2007-11-14
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the radial nanoscale size and high surface energy of carbon nanotubes make them easy to agglomerate in polymers and have poor dispersion, which not only reduces the effective aspect ratio of carbon nanotubes, but also easily causes the gap between tubes and tubes The slippage of the carbon nanotubes makes the strengthening effect of the carbon nanotubes worse
In addition, the surface characteristics of carbon nanotubes are similar to those of graphite, so they are incompatible in most solvents and have poor wettability, making it difficult to form an effective bond with the polymer matrix.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The raw materials used include: polyimide resin powder, GCPI produced by Changzhou Guangcheng Plastic Co., Ltd. TM Type, 150 mesh. Carbon nanotubes: multi-walled carbon nanotubes produced by Shenzhen Nanoport Co., Ltd.

[0015] The weight percentages of each component in the rare earth modifier are as follows:

[0016] Rare earth compound 0.3%, ethanol 97%, ethylenediaminetetraacetic acid 0.4%, ammonium chloride 0.8%, nitric acid 0.5%, urea 1%.

[0017] The weight percentages of each component of the raw material are as follows:

[0018] Polyimide: 99%

[0019] Carbon nanotubes: 1%

[0020] The carbon nanotubes are first pretreated, and the carbon nanotubes are immersed in the above-mentioned rare earth modifier at room temperature for 2 hours, filtered and then dried. Mix the treated carbon nanotubes with distilled water to prepare a solution with a weight percent of carbon nanotubes of 2%, and put it into a planetary ball mill for ball milling for 30 minutes at a...

Embodiment 2

[0025] The raw materials used are: polyimide resin powder, GCPI produced by Changzhou Guangcheng Plastic Co., Ltd. TM Type, 150 mesh. Carbon nanotubes: multi-walled carbon nanotubes produced by Shenzhen Nanoport Co., Ltd.

[0026] The weight percentage of each component in the rare earth modifier: 0.5% of rare earth compound, 97.5% of ethanol, 0.2% of ethylenediaminetetraacetic acid, 0.5% of ammonium chloride, 0.5% of nitric acid, and 0.8% of urea.

[0027] The weight percentages of each component of the raw material are as follows:

[0028] Polyimide: 95%

[0029] Carbon nanotubes: 5%

[0030] The carbon nanotubes are first pretreated, and the carbon nanotubes are immersed in the above-mentioned rare earth modifier at room temperature for 2 hours, filtered and then dried. Mix the treated carbon nanotubes with distilled water to prepare a solution with a weight percent of carbon nanotubes of 6%, and put it into a planetary ball mill for ball milling for 60 minutes at a spe...

Embodiment 3

[0034] The raw materials used are: polyimide resin powder, GCPI produced by Changzhou Guangcheng Plastic Co., Ltd. TM Type, 150 mesh. Carbon nanotubes: multi-walled carbon nanotubes produced by Shenzhen Nanoport Co., Ltd.

[0035] The weight percentage of each component in the rare earth modifier: 1% of rare earth compound, 96% of ethanol, 0.5% of ethylenediaminetetraacetic acid, 1% of ammonium chloride, 0.5% of nitric acid, and 1% of urea.

[0036] The weight percentages of each component of the raw material are as follows:

[0037] Polyimide: 90%

[0038] Carbon nanotubes: 10%

[0039] The carbon nanotubes are first pretreated, and the carbon nanotubes are immersed in the above-mentioned rare earth modifier at room temperature for 2 hours, filtered and then dried. Mix the treated carbon nanotubes with distilled water to prepare a solution with a weight percent of carbon nanotubes of 10%, and put it into a planetary ball mill for ball milling for 60 minutes at a speed of ...

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Abstract

The invention relates to a method for preparation of rare earth-modified carbon nano-tube / polyimide composite, which consists of performing mat-forming treatment of modifying property to carbon nano-tube adopting rare earth modifier first, then laying the disposed carbon nano-tube into the ball grinder to mill, afterwards, mechanically blending the carbon nano-tube and the polyimide powder and controlling the percentage by weight of the carbon nano-tube to occupy 1-10 % of the mixed powder, then laying the mixed powder into the stainless steel die for press forming, finally preparing the composite by high-sintering. Thereinto, the rare earth modifier consists of rare-earth compound, alcohol, ethylene diamine tetraacetic acid, ammonii chloridum, aqua fortis and aquacare. The invention is of simple technique and low cost, is non-contamination, and the prepared composite possess good dynamic property and frictional behavior.

Description

technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for preparing a rare-earth modified carbon nanotube / polyimide composite material. The polyimide composite material is filled with carbon nanotubes treated on the surface of rare earth, and Obtain relatively high interfacial bonding force, increase the hardness of the polyimide resin matrix, and then improve the mechanical properties and wear resistance of the composite material. Background technique [0002] Polyimide is a class of organic polymers containing imide groups in the main chain. It has outstanding thermal stability, good impact resistance, radiation resistance and solvent resistance. It can be used in extreme environments such as high temperature, high and low pressure and high speed. It has good friction and wear properties, and is a kind of matrix material with great potential for application in the field of tribology. However, due to the low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K9/02C08K3/04
Inventor 程先华亓永李健
Owner SHANGHAI JIAOTONG UNIV
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