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

A carbon nanotube and rare earth modification technology, which is applied in the field of preparation of rare earth modified carbon nanotube/polypropylene composite materials, can solve the problems of poor dispersion, poor wettability, easy agglomeration, etc., to improve mechanical properties and tribology Performance, good mechanical properties and tribological properties, the effect of simple process methods

Inactive Publication Date: 2008-05-21
SHANGHAI JIAO TONG 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
Moreover, it is easy to cause slippage between tubes and tubes, which makes the reinforcement effect of carbon nanotubes worse.
In addition, the surface characteristics of carbon nanotubes are similar to those of graphite, they are insoluble in most solvents, have poor wettability, and it is 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

[0016] The raw materials used include: polypropylene powder, PP-K8303, produced by Beijing Yanshan Petrochemical Company. Carbon nanotubes: multi-walled carbon nanotubes produced by Shenzhen Nanoport Co., Ltd. The component weight percent of the rare earth modifier used is: 0.1% of rare earth compound, 99.7% of ethanol, 0.05% of ethylenediaminetetraacetic acid, 0.1% of ammonium chloride, 0.02% of nitric acid and 0.03% of urea.

[0017] First soak the carbon nanotubes in the rare earth modifier for 2 hours at room temperature, filter and then dry. The treated carbon nanotubes were mixed with distilled water to prepare a solution with a weight percent of carbon nanotubes of 2%, and put into a planetary ball mill for ball milling for 30 minutes at a speed of 100 r / min. The obtained carbon nanotubes were fully dried in an oven at 100°C.

[0018] Then, according to the weight percentage, mix 99% polypropylene with 1% dried carbon nanotubes, carry out mechanical crushing and stirr...

Embodiment 2

[0022] The raw materials used include: polypropylene powder: PP-K8303 resin powder produced by Beijing Yanshan Petrochemical Company. Carbon nanotubes: single-walled carbon nanotubes, double-walled carbon nanotubes and multi-walled carbon nanotubes produced by Shenzhen Nano Harbor Co., Ltd. The components by weight of the rare earth modifier are as follows: 1.5% of rare earth compounds, 96% of ethanol, 0.2% of ethylenediaminetetraacetic acid, 0.8% of ammonium chloride, 0.5% of nitric acid and 1% of urea.

[0023] First soak the carbon nanotubes in the rare earth modifier at room temperature for 3 hours, filter and then dry. The treated carbon nanotubes were mixed with distilled water to prepare a solution with a weight percent of carbon nanotubes of 6%, and put into a planetary ball mill for ball milling for 15 minutes at a speed of 500 r / min. The obtained carbon nanotubes were fully dried in an oven at 100°C.

[0024] Then, according to the weight percentage, mix 95% polypr...

Embodiment 3

[0027] The raw materials used include: polypropylene powder: PP-K8303 resin powder produced by Beijing Yanshan Petrochemical Company. Carbon nanotubes: single-walled carbon nanotubes, double-walled carbon nanotubes and multi-walled carbon nanotubes produced by Shenzhen Nano Harbor Co., Ltd. The component weight percent of the rare earth modifier used is: 2% of rare earth compound, 95% of ethanol, 0.5% of ethylenediaminetetraacetic acid, 1% of ammonium chloride, 0.5% of nitric acid and 1% of urea.

[0028] First soak the carbon nanotubes in the rare earth modifier at room temperature for 4 hours, filter and then dry. 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 400 r / min. The obtained carbon nanotubes were fully dried in an oven at 100°C.

[0029] Then, according to the percentage by weight, mix 90% polypropylene ...

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Abstract

The invention relates to a method for preparation of rare earth-modified carbon nano-tube / polypropylene 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 polypropylene pellet 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 die for press forming, finally preparing the composite by thermocompression solidification. 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 / polypropylene composite material. The polypropylene composite material is filled with carbon nanotubes treated with rare earth surface to obtain a relatively high The interfacial bonding force can improve the hardness of the polypropylene resin matrix, thereby improving the mechanical properties and wear resistance of the composite material. Background technique [0002] Polypropylene (PP) is a thermoplastic synthetic resin with excellent performance. It has the advantages of small specific gravity, non-toxicity, easy processing, impact strength, anti-disturbance and good electrical insulation. It has been widely used in packaging, daily necessities, It has become one of the most widely used plastics in various fields such as chemical industry, automobile, and medical treatment. However, polypropylene also...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/10C08K3/04C08K9/02
Inventor 程先华亓永李健
Owner SHANGHAI JIAO TONG UNIV
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