Reactive carbon nano tube and its preparation method

A technology of carbon nanotubes and reactivity, which is applied in the field of reactive carbon nanotubes and its preparation, can solve the problems of limited polymer reinforcement effect, increase the solubility of carbon nanotubes, etc., and achieve the effect of improving mechanical and other properties

Inactive Publication Date: 2006-05-24
山西三盟实业发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Literature (Chem.Mater.15 (2003) 3256-3260) reported soluble carbon nanotubes, the method grafted alkyl chains on carbon nanotubes by chemical reaction, increasing the carbon nanotubes in solvent (chloroform, toluene , dichlorobenzene, chlorobenzene, etc.), the dispersibility of the carbon nanotubes prepared by this method in the polymer becomes better, but because it still relies on the intermolecular Force, so the reinforcement effect on the polymer is also very limited

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  • Reactive carbon nano tube and its preparation method
  • Reactive carbon nano tube and its preparation method
  • Reactive carbon nano tube and its preparation method

Examples

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Effect test

Embodiment 1

[0030] Mix 1 part by weight of carbon nanotubes with 60 parts by weight of concentrated nitric acid, reflux at reflux temperature for 36 hours, allow it to cool naturally to room temperature, slowly add 100 parts by weight of deionized water to dilute, and add 1mol / L NaOH aqueous solution after cooling Neutralize to make the pH value to 3-4, centrifuge, then wash with deionized water to pH 5-6, wash with acetone once to remove organic matter, and vacuum dry at 100°C for 12 hours to obtain acid oxidation purified carbon nanotubes.

[0031] Add 1 part by weight of the carbon nanotubes obtained by the above method to 30 parts by weight of anhydrous acetone, pass N 2 Protected, add 2 parts by weight of toluene 2,4-diisocyanate dropwise under magnetic stirring, heat up to 50°C and react at a constant temperature for 24 hours after the dropwise addition, filter the product and wash it five times with anhydrous acetone, and dry it in vacuum at 100°C for 12 hours Reactive carbon nano...

Embodiment 2

[0033] Mix 1 part by weight of carbon nanotubes with 60 parts by weight of mixed acid (3:1 volume ratio of concentrated sulfuric acid and concentrated nitric acid), reflux at reflux temperature for 36 hours, slowly add 100 parts by weight of deionized water to dilute, and add 1mol / L NaOH aqueous solution to neutralize the pH value to 3-4, filter with suction, wash with deionized water until the pH value is 5-6, wash once with acetone to remove organic matter, and dry in vacuum at 100°C for 12 hours to obtain Acid oxidation of purified carbon nanotubes. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed the grafting of carboxyl groups onto carbon nanotubes (see figure 1 and figure 2 ).

[0034] Add 1 weight part of carbon nanotubes obtained by the above-mentioned method into 30 weight parts of anhydrous acetone, pass N 2Protected, add 2 parts by weight of toluene 2,4-diisocyanate dropwise under magnetic stirring, heat up to ...

Embodiment 3

[0036] Mix 1 part by weight of carbon nanotubes with 40 parts by weight of concentrated nitric acid, ultrasonicate at room temperature for 12 hours, slowly add 100 parts by weight of deionized water to dilute, and after cooling, add 1 mol / L NaOH aqueous solution for neutralization to make the pH value to 3-4, centrifuged, washed with deionized water to pH 5-6, washed once with acetone to remove organic matter, and vacuum-dried at 100° C. for 12 hours to obtain carbon nanotubes purified by acid oxidation.

[0037] Add 1 weight part of carbon nanotubes obtained by the above-mentioned method into 30 weight parts of anhydrous toluene, pass N 2 protection, add 0.5 parts by weight of diphenylmethane diisocyanate dropwise under magnetic stirring, raise the temperature to 80°C for 4 hours at a constant temperature and react at a constant temperature for 4 hours, filter the product with suction and wash five times with anhydrous toluene, and vacuum dry at 100°C for 12 hours to obtain R...

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Abstract

The invention belongs to the field of carbon nanotubes, in particular to reactive carbon nanotubes and a preparation method thereof. First, carbon nanotubes are subjected to acid oxidation purification treatment to remove impurities and graft carboxyl groups (-COOH) on carbon nanotubes, and then react with di- or polyisocyanates under anaerobic and anhydrous conditions. The obtained reactive carbon nanotubes have a diameter of 0.4-100nm and a length of 0.5-1000μm; they contain 0.1-5×10 -3 Moles / gram of reactive groups of carbon nanotubes. The reactive carbon nanotubes of the present invention can be used to prepare polyurethane composite materials, can initiate the polymerization of carbon-carbon double bonds under certain conditions, and can also be reactively extruded with polymers with active hydrogen such as polyamides to realize The chemical bonds between carbon nanotubes and polymers make full use of the excellent mechanical, electrical and thermal properties of carbon nanotubes to greatly improve the performance of composite materials.

Description

technical field [0001] The invention belongs to the field of carbon nanotubes, in particular to reactive carbon nanotubes and a preparation method thereof. Background technique [0002] Carbon Nanotubes, also known as carbon nanotubes, carbon nanotubes, carbon nanotubes, fuller tubes, carbon nanotubes, carbon nanotubes, carbon nanotubes, carbon nanotubes or bucky tubes, etc. , is a quasi-one-dimensional material with a special structure, and can be divided into single-wall carbon nanotubes and multi-wall carbon nanotubes according to the number of graphite-like layers that make up the tube wall. The diameter of carbon nanotubes is on the order of nanometers, the aspect ratio is very large (hundreds or even thousands), and the mechanical properties are extremely excellent (its strength is 100 times higher than that of steel, but its density is only one sixth of that of steel). Very outstanding electrical and thermal properties, it is an ideal reinfo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02
Inventor 阳明书赵春贵张世民许爱忠
Owner 山西三盟实业发展有限公司
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