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

A technology of polytetrafluoroethylene and carbon nanotubes, which is applied in the field of preparation of rare earth modified carbon nanotubes/polytetrafluoroethylene composite materials, can solve the problems of poor dispersion, poor wettability, easy agglomeration, etc., and achieve improved mechanical properties And tribological properties, good mechanical properties and tribological properties, the effect of simple process methods

Active Publication Date: 2008-01-30
NOUDUN HIGH FUNCTION PLASTIC SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

[0015] The raw materials used include: polytetrafluoroethylene resin, SM021-F type produced by Shanghai Chlor-Alkali Chemical Co., Ltd.; carbon nanotubes: multi-walled carbon nanotubes produced by Shenzhen Nanoport Co., Ltd.

[0016] The component weight percent of the rare earth modifier that adopts is as follows:

[0017] Rare earth compound 0.3%, ethanol 99.5%, ethylenediaminetetraacetic acid 0.05%, ammonium chloride 0.1%, nitric acid 0.02%, urea 0.03%.

[0018] The weight percentages of each component of the raw material are as follows:

[0019] PTFE: 95%

[0020] Carbon nanotubes: 5%

[0021] 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 4%, and put it into a planetary ball mill for ball milling for 30 minutes at a s...

Embodiment 2

[0025] The raw materials used are: polytetrafluoroethylene: SM021-F type produced by Shanghai Chlor-Alkali Chemical Co., Ltd.; carbon nanotubes: multi-walled carbon nanotubes produced by Shenzhen Nanoport Co., Ltd.

[0026] The weight percentages of each component of the rare earth modifier are as follows:

[0027] 1% of rare earth compounds, 1% of ethanol, 0.5% of ethylenediaminetetraacetic acid, 1% of ammonium chloride, 0.5% of nitric acid, and 1% of urea.

[0028] The weight percentages of each component of the raw material are as follows:

[0029] PTFE: 90%

[0030] Carbon nanotubes: 10%

[0031] 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 15 minutes at...

Embodiment 3

[0035] The raw materials used include: polytetrafluoroethylene: SM021-F type produced by Shanghai Chlor-Alkali Chemical Co., Ltd.; carbon nanotubes: multi-walled carbon nanotubes produced by Shenzhen Nanoport Co., Ltd. The components by weight of the rare earth modifier are as follows: 1.5% of rare earth compounds, 96.5% of ethanol, 0.2% of ethylenediaminetetraacetic acid, 1% of ammonium chloride, 0.3% of nitric acid and 0.5% of urea.

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

[0037] PTFE: 85%

[0038] Carbon nanotubes: 15%

[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 2%, and put it into a planetary ball mill for ball milling for 60 minutes at a speed of 400 r / min. Th...

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Abstract

The invention relates to a method for preparation of rare earth-modified carbon nano-tube / politef 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 politef pellet and controlling the percentage by weight of the carbon nano-tube to occupy 5-15 % 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 preparation method of a composite material, in particular to a preparation method of a rare-earth modified carbon nanotube / polytetrafluoroethylene composite material, which is prepared by filling polytetrafluoroethylene with a carbon nanotube treated with a rare earth modifier materials to improve the bonding force of the interface of the carbon nanotube / polytetrafluoroethylene composite material, and then improve the practical engineering application value of the composite material. Background technique [0002] Polytetrafluoroethylene is the most potential anti-friction material. Although it has good self-lubricating properties, low friction coefficient, corrosion resistance and low temperature resistance, it has poor mechanical properties, large linear expansion coefficient and poor thermal conductivity. The amount of wear is large, and it is not suitable for use as a wear-resistant material alone. It is usually modified ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08K9/00C08K3/04
Inventor 程先华亓永李健
Owner NOUDUN HIGH FUNCTION PLASTIC SHANGHAI
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