Method for preparing carbon nanotube grafted with vinyl macromolecular chain on the surface

Abstract

The invention provides a method for preparing carbon nanotube grafted with vinyl macromolecular chain on the surface. The method is characterized in that carbon nanotube is processed by Fenton reagent formed by soluble ferrous salt and oxyful, so as to realize surface hydroxylation; a coupling agent containing unsaturated double bond functional groups is used for surface treatment; and the carbon nanotube of which the surface is provided with double bonds, and vinyl monomer are processed by graft polymerization reaction to obtain the carbon nanotube grafted with vinyl macromolecular chain on the surface. The method has the advantages of environmental protection, high efficiency, low cost and simple process, and is suitable for industrial production. The obtained functionalized carbon nanotube has excellent oil solubility or water solubility, vinyl monomer used for graft is adjusted to realize that the carbon nanotube can be endued with favorable dispersibility in a majority of polymer materials and higher interfacial function which mainly depends on chemical bonds can be formed by the carbon nanotube and the polymer materials, and therefore, the excellent performances of the carbon nanotube can be fully utilized to prepare high performance or functionalized polymer composite materials.

Description

technical field [0001] The invention belongs to the preparation of carbon nanometer materials, in particular to a method for preparing carbon nanotubes whose surface is grafted with vinyl polymer chains. Background technique [0002] In the past ten years, carbon nanotubes (CNTs) have achieved major breakthroughs in many fields of application due to their unique structure, excellent mechanical properties, and functional properties such as light, electricity, and heat. Showing more potential applications, it has become a new hotspot in nanoscience research. The research on the application of carbon nanotubes in polymer materials has been widely concerned, and the ultimate goal is to prepare high-performance or functional polymer-based composite materials by mixing carbon nanotubes with polymer materials through specific means. However, in order to achieve the above goals, three outstanding problems must be solved: (1) CNTs are difficult to disperse and easily aggregate in po...

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Problems solved by technology

However, in order to achieve the above goals, three outstanding problems must be solved: (1) CNTs are difficult to disperse and easily aggregate in polymer materials; (2) the compatibility between CNTs and polymer materials is poor, which is not conducive to the improvement of some properties. Improvement, such as mechanical properties; (3) The interface between carbon nanotubes and polymer materials is generally poor

The main approach of this method is mostly to adopt the atom transfer radical polymerization grafting method (CN 1486999; CN1546545A etc.), and this method technology is more complicated, and before graft polymerization, methods such as strong acid oxidation and acyl chloride are mostly used to treat carbon The surface pretreatment of nanotubes will bring about negative effects such as damage to the walls of carbon nanotubes, cutting off, high toxicity, and heavy pollution.

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