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Method for catalyzing polymer with multi-metallic catalyst to compound carbon nano-tube in situ

A polymetallic catalyst and carbon nanotube technology, applied in the field of preparation of nanotubes, can solve the problems of complex process, equipment corrosion and high cost, and achieve the effects of simple preparation process, mild reaction conditions and lower production cost.

Inactive Publication Date: 2010-12-01
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is in order to solve the problems such as complex process, low output, high cost and the use of halogen compounds as synergists to equipment corrosion in the existing preparation method of carbon nanotubes; Method for Synthesizing Carbon Nanotubes

Method used

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  • Method for catalyzing polymer with multi-metallic catalyst to compound carbon nano-tube in situ
  • Method for catalyzing polymer with multi-metallic catalyst to compound carbon nano-tube in situ
  • Method for catalyzing polymer with multi-metallic catalyst to compound carbon nano-tube in situ

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specific Embodiment approach 1

[0011] Specific embodiment 1: In this embodiment, the method for in situ synthesis of carbon nanotubes using polymetallic catalysts to catalyze polymers is carried out according to the following steps: 1. According to the ratio of parts by weight, 50 to 99.5 parts of polyolefin and 0.5 to 50 Mix one part of polymetallic catalyst uniformly at the melting temperature of polyolefin to obtain a mixture; 2. Add the mixture obtained in step 1 into a quartz tube, and then crack under nitrogen protection at 450°C to 750°C until no gas is generated , that is, carbon nanotubes (see Figure 1 to Figure 4 ).

[0012] The char formation rate of the method in this embodiment is more than 40%; more than 99% of the char is carbon nanotubes.

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the polymer described in step one is polyethylene, polypropylene, polypropylene grafted with maleic anhydride, ethylene-octene copolymer, ethylene-butylene ethylene copolymer, ethylene-hexene copolymer, ethylene propylene rubber, EPDM rubber, polystyrene, polyisobutylene, polybutadiene, natural rubber, acrylonitrile-butadiene-styrene copolymer, acrylonitrile - One or a combination of two ethylene-styrene copolymers; or waste recycling of the above materials. Other steps and parameters are the same as in the second embodiment.

[0014] When the polymer described in this embodiment is a mixture, the two polymers are mixed in any ratio.

specific Embodiment approach 3

[0015] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the multi-metal catalyst described in step one is a metal oxide alloy of nickel, magnesium and molybdenum, or nickel, magnesium and molybdenum supported on a carrier metal oxide alloys. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for catalyzing a polymer with a multi-metallic catalyst to compound a carbon nano-tube in situ, which relates to a method for preparing nano-tubes. The method solves the problems of complicated process, low yield, high cost, equipment corrosion caused by taking halogen compounds as synergists and the like in the conventional preparation method of the nano-tubes. The method comprises the following steps of: 1, uniformly mixing polyolefin and the multi-metallic catalyst at the melting temperature of the polyolefin to obtain a mixture; and 2, feeding the mixture into a quartz tube, and performing pyrolysis or combustion to obtain the carbon nano-tube. The method has the advantages of simple process, high yield, low production cost and less corrosion to the equipment.

Description

technical field [0001] The invention relates to a preparation method of nanotubes. Background technique [0002] Carbon nanotubes are characterized by diameters ranging from several angstroms to tens of nanometers, and aspect ratios ranging from tens to thousands. Carbon nanotubes have been widely used due to their excellent physical and mechanical properties and electrical conductivity. Usually, carbon nanotubes are prepared by arc generation method, laser evaporation method, electrochemical vapor deposition method, catalytic synthesis method and plasma synthesis method. In these methods, the carbon source is usually small organic hydrocarbon molecules, such as methane, acetylene, ethylene, etc., and organic polymers, especially recycled polymers, are rarely used as carbon source materials for the preparation of carbon nanotubes. As reported in ZL01118349.7, a fluidized bed cracking reactor is used, CO and low-carbon hydrocarbons below 7 carbons are used as carbon sources...

Claims

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Application Information

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IPC IPC(8): C01B31/02B01J23/887B01J23/883
Inventor 宋荣君栾珊珊姬晴杨云鹏
Owner NORTHEAST FORESTRY UNIVERSITY
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