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Carbon nanotube/polypropylene composite materials and process for preparing same

A technology of carbon nanotubes and composite materials, which is applied in the field of carbon nanotube/polypropylene antistatic composite materials and its preparation, can solve the problems of affecting uniform dispersion, easy agglomeration, and poor performance of composite materials, and achieves a simple preparation process Effect

Inactive Publication Date: 2005-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, carbon nanotubes are small in diameter and large in surface energy, so they are prone to agglomeration, which affects their uniform dispersion in polymers, resulting in poor performance of composite materials.
The first problem to be solved in the application of carbon nanotubes in polymer composites is its dispersibility, which is one of the prerequisites for endowing composite materials with excellent performance; at the same time, the production cost of carbon nanotubes is still high, so carbon nanotubes Nanotube composites have very limited applications without greatly improving their properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15

[0072] The detailed processing parameters and raw materials and consumption thereof of each embodiment are as follows:

Embodiment 1

[0074] 1. Surface modification of nanotubes

[0075] (1) Nitric acid treatment

[0076] The raw carbon nanotubes were placed in an oven at 100°C and dried for 120 minutes. The dried CNTs were mixed with nitric acid with a concentration of 2.0 mol / L at a ratio of 1:3 (wt%), heated to reflux under the action of a stirrer, the treatment temperature was 120° C., and the treatment time was 8 hours. Take out the treated matter, wash it repeatedly with distilled water until pH=7, and put it into an oven at 100°C for drying.

[0077] (2) ball mill

[0078] The CNTs obtained in (1) were mixed with distilled water to form a 20 wt% solution, and put into a planetary ball mill for ball milling for 5 minutes at a speed of 300 r / min. Then the obtained CNTs were fully dried in an oven at 100°C.

[0079] 2. Fully mix the CNTs obtained in step (2) with polypropylene particles and coupling agent in proportion, and the weight ratio is:

[0080] PP: CNTs: compatibilizer: coupling agent = 87....

Embodiment 2

[0086] Embodiment 2: as implementing the preparation method described in Lee 1, process parameter changes as follows:

[0087] Nitric acid concentration: 2.0mol / L

[0088] Acid treatment temperature: 140°C

[0089] Acid treatment time: 4h

[0090] CNTs solution concentration: 2wt%

[0091] Ball milling time: 30min

[0092] Ball mill speed: 100r / min

[0093] PP: CNTs: compatibilizer: coupling agent = 92.0: 5.0: 1.5: 0.5

[0094] Grafting rate: 1.0%

[0095] Coupling agent: vinyl silane

[0096] CNTs specifications: particle size 10-30nm, length 0.5-500 μm, high degree of graphitization Example 3: The preparation method as described in Example 1, the process parameters are changed as follows:

[0097] Nitric acid concentration: 3.0mol / L

[0098] Acid treatment temperature: 60°C

[0099] Acid treatment time: 16h

[0100] CNTs solution concentration: 8wt%

[0101] Ball milling time: 15min

[0102] Ball mill speed: 500r / min

[0103] PP: CNTs: compatibilizer: coupling a...

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Abstract

The present invention provides one kind of composite antistatic carbon nanotube / polypropylene material and its preparation process. The composite antistatic carbon nanotube / polypropylene material has carbon nanotube as main antistatic modifying material and polypropylene as main modified target. The composite antistatic carbon nanotube / polypropylene material has both excellent antistatic performance and excellent mechanical performance.

Description

technical field [0001] The invention relates to an antistatic composite material, specifically, a carbon nanotube / polypropylene antistatic composite material with carbon nanotubes (CNTs) as the main antistatic modification material and polypropylene (PP) as the main modification object. Materials and their preparation methods. Background technique [0002] Polypropylene (PP), because of its excellent performance and low price, has been widely used in various fields such as packaging, daily necessities, chemicals, automobiles, and medical treatment, and has become one of the most widely used plastics. But its electrical insulation also makes it have defects in the application of chemical pipelines and containers-it is easy to generate static charge when it is rubbed or peeled off from the outside world, and the charge is not easy to leak, and it will continue to accumulate on the surface. After the polypropylene surface is charged, if there is no effective leakage channel, i...

Claims

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Application Information

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IPC IPC(8): C08K3/04C08K5/54C08K9/02C08L23/12
Inventor 吴唯钱琦黄祖雄刘敏杨竹亭
Owner CHINA PETROLEUM & CHEM CORP
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