Preparation method for in-situ grafting carbon nano tube containing benzoxazole ring polymer

Abstract

The invention belongs to the technical field of materials, and particularly relates to a preparation method for an in-situ grafting carbon nano tube containing benzoxazole ring polymer. According to the method, 4-halogenate carboxylic ester benzocyclobutene is grafted to a multi-wall carbon nano tube by Diels-Alder reaction, atom transfer radical polymerization initiates the polymerization of N-(o-hydroxyphenyl) acrylamide monomer, and a product is subjected to thermal cyclization so as to obtain the in-situ grafting carbon nano tube containing the benzoxazole ring polymer. The method has theadvantages that: the damage and cutting of the carbon nano tube, which are caused by acid treatment, can be avoided; the structural integrity of the carbon nano tube is kept; the in-situ grafting carbon nano tube containing benzoxazole ring polymer, which is obtained by the atom transfer radical polymerization, is uniform in performance; grafting polymers are connected with each other through delocalized pi bonds of the carbon nano tube so as to form a unique conjugated system; and the in-situ grafting carbon nano tube containing the benzoxazole ring polymer has wide application prospect in the aspects of semiconductors, antistatic materials, anode materials, electromagnetic shielding and structure stealth materials and the like.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a method for preparing carbon nanotubes grafted with polymers containing benzoxazole rings in situ. Background technique [0002] As a special nanomaterial, carbon nanotubes have unique structures and properties. It not only has the quantum effect of ordinary nanoparticles, but also has the characteristics of large specific surface area, high mechanical strength, high electrical conductivity, and good heat resistance. Polymers containing benzoxazole rings have unique and excellent properties of high strength, high modulus, and high temperature resistance. Therefore, in situ grafting of carbon nanotubes with polymers containing benzoxazole rings is expected to obtain dielectric materials with excellent mechanical properties, high temperature resistance, and good thermal conductivity. [0003] The modification methods of carbon nanotubes are mainly divided into two categories: ...

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Problems solved by technology

Among these methods, although the polymers prepared by reversible addition-cleavage chain transfer polymerization, anionic polymerization, ring-opening polymerization, ring-opening metathesis polymerization and ring-opening catalyst coordination polymerization have certain controllability, they are applicable to the range of monomers. Relatively limited, thus limiting the application of these methods, it is also not suitable for carbon nanotubes grafted with polymers containing benzoxazole rings in situ

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