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

A technology of benzoxazole rings and carbon nanotubes, applied in the field of materials, can solve problems such as the limitation of the range of applicable monomers, achieve uniform properties, wide application prospects, and maintain integrity

Active Publication Date: 2012-06-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment 1

[0034] A method for preparing carbon nanotubes grafted with polymers containing benzoxazole rings in situ, using multi-walled carbon nanotubes as the initial raw material, and 4-bromoisobutyric acid ethyl ester by Diels-Alder reaction Benzocyclobutene was grafted onto the surface of carbon nanotubes as a monomer polymerization initiator; N-(o-hydroxyphenyl) acrylamide monomer was polymerized on the surface of carbon nanotubes by atom transfer radical polymerization, and finally passed Heat treatment makes the ring closure of the polymer, and obtains carbon nanotubes grafted with polymers containing benzoxazole rings in situ; the specific steps are:

[0035] (1) Preparation of carbon nanotube initiator

[0036] Disperse 50 mg of multi-walled carbon nanotubes (manufactured by Shenzhen Nanometer Port Co., Ltd., diameter 97%) that had been calcined in air at 500 °C for 5 hours in nitrogen atmosphere in 10 g of fourteen In alkanes, after ultrasonic treatment for 30min, stirring an...

Embodiment 2

[0042] A method for preparing carbon nanotubes grafted with polymers containing benzoxazole rings in situ, using single-walled carbon nanotubes as the initial raw material, and 4-bromoethyl propionate benzene by Diels-Alder reaction And cyclobutene is grafted onto the surface of carbon nanotubes as a monomer polymerization initiator; atom transfer radical polymerization is used to initiate the polymerization of N-(o-hydroxyphenyl) methacrylamide monomer on the surface of carbon nanotubes. Finally, the polymer is ring-closed by heat treatment to obtain carbon nanotubes grafted with polymers containing benzoxazole rings in situ; the specific steps are:

[0043] (1) Preparation of carbon nanotube initiator

[0044] Disperse 50 mg of single-walled carbon nanotubes (manufactured by Shenzhen Nanometer Port Co., Ltd., diameter 90%) that had been calcined in air at 300°C for 20 hours in argon atmosphere in 20 mg of dodecyl In alkanes, after ultrasonic treatment for 30min, stir and he...

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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: ...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F8/48
Inventor 庄启昕毛晓阳陈一王丹刘小云韩哲文
Owner EAST CHINA UNIV OF SCI & TECH
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