High-strength polymer nanoribbons and preparation method thereof

Abstract

The invention provides high-strength polymer nanoribbons and a preparation method thereof. The nanoribbons are spontaneously generated in a polycondensation forming process of a polymer, wherein the polymer has the structure general formula as described in the specification, wherein R represents NH2, OH, alkoxy or alkyl, alkoxy is selected from methoxyl and ethyoxyl, and alkyl is selected from methyl or ethyl. The whole-carbon ladder polymer is formed by polycondensation of two monomers and spontaneously generates the nanoribbons during the forming process, no template agent and no subsequent processing are required, and a new technical idea and a new solving method are provided for synthesis of the high-strength nanoribbons; and the prepared polymer nanoribbons have high strength and excellent mechanical properties, and can be well used as reinforcing materials in composite materials.

Description

technical field [0001] The invention relates to the technical field of preparation of nanobelts, in particular to a high-strength polymer nanobelt and a preparation method thereof. Background technique [0002] At present, the shapes used as reinforcement materials in composite materials are usually fibers, nanowires, nanotubes, nanoribbons, and nanosheets, among which the fibers are prepared by spinning, while the reinforcement of the other four shapes Materials are prepared in a variety of ways, but overall they are complex. Except for a few polymers with low melting points that can be spun by dry spinning, most polymers can only be spun by wet spinning, which requires a large amount of solvents, which increases the cost of raw materials on the one hand, and increases the cost of the process on the other hand. The synthesis of nanowires and nanotubes generally adopts high-temperature chemical vapor deposition, which has complex processes and low yields. [0003] There ar...

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Problems solved by technology

[0002] At present, the shapes used as reinforcement materials in composite materials are usually fibers, nanowires, nanotubes, nanoribbons, and nanosheets, among which the fibers are prepared by spinning, while the reinforcement of the other four shapes Materials are prepared in a variety of ways, but are generally complex

Except for a few polymers with low melting point that can be spun by dry spinning, most polymers can only be spun by wet spinning, which requires a large amount of solvent, which increases the cost of raw materials on the one hand, and increases the cost of the process on the other hand.

The synthesis of nanowires and nanotubes generally uses high-temperature chemical vapor deposition, which has complex processes and low yields

[0003] There are various methods for manufacturing nanoribbons in the prior art. For example, people such as Liu publicly reported a method for preparing a polyphenylene vinylene nanoribbon array: adding nano-copper catalyst and phenylacetylene to a polytetrafluoroethylene reactor, and sealing it. When the temperature is raised to 180°C, phenylacetylene is gasified and polymerized on the surface of the nano-copper catalyst to form a polyphenylene vinylene nanoribbon array. However, the process of preparing nanoribbons by this method is relatively complicated, and the strength of the prepared nanoribbons is low.

Another invention patent CN200410011173.X discloses a preparation method of poly-o-phenylenediamine nanoribbons: using o-phenylenediamine as raw material, using silver nitrate, chloroauric acid or ferric chloride as oxidizing agent, combining o-phenylenediamine and oxidizing agent After mixing according to a certain molar ratio, the poly-o-aniline nanobelts can be obtained. Although the poly-o-aniline nanoribbons prepared by this method have good electrical conductivity, it is difficult to become a high-strength reinforcing material due to its low molecular weight.

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