Grafting method of multi-wall carbon nanometer tubes

Abstract

The invention relates to a grafting method of multi-wall carbon nanometer tubes. The grafting method aims at solving the problem that multi-wall carbon nanometer tubes are difficult to be dispersed and have poor compatibility, adopts maleic anhydride as a grafting modifier, benzoyl peroxide as an initiator and xylene as a dispersant, can open double-bond in maleic anhydride molecular structures in a nitrogen atmosphere and a water-bath through ultrasonic dispersion, heating, stirring, and water circulation condensation and can graft products on the surfaces of the multi-wall carbon nanometer tubes so that carbon nanometer tube modification is realized and dispersion effects and compatibility are improved. The grafting method needs less devices, has a short process flow, good grafting effects and a high grafting rate reaching 59.73%. Modified multi-wall carbon nanometer tubes can be integrated with multiple polymers for use. Therefore, the grafting method of multi-wall carbon nanometertubes is very ideal.

Description

technical field [0001] The invention relates to a grafting method of multi-walled carbon nanotubes, belonging to the technical field of modification methods and applications of inorganic carbon materials. Background technique [0002] Carbon nanotubes (CNTs) are hollow seamless tubular nanostructure materials formed by curling single-layer or multi-layer graphite sheets. Up to 1.8×10 12 Pa is 100 times that of steel, the bending strength can reach 14.2GPa, the strain energy can reach 100keV, and the density is only 1 / 6 of steel; the thermal conductivity of CNTs with a length > 10nm is > 2800W / m K; Due to the limitation of shape, the radial thermal expansion of carbon nanotubes is almost zero; carbon nanotubes also have excellent optics, field emission, resistance to strong acid, strong alkali and high temperature oxidation resistance, and multi-walled carbon nanotubes are usually used. As a reinforcing phase, walled carbon nanotubes can improve the mechanical propert...

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Problems solved by technology

[0003] However, multi-walled carbon nanotubes are difficult to disperse uniformly in polymers and have poor compatibility with matrix materials. Therefore, the surface of multi-walled carbon nanotubes must be modified by grafting to improve compatibility and dispersion in order to expand Applications of multi-walled carbon nanotubes

[0004] At present, the surface modification methods of multi-walled carbon nanotubes have disadvantages such as complicated process, low reaction efficiency, and low grafting rate; Uniformity will also bring difficulties to subsequent processing

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