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Polymer carbon nano tube compound structure and preparation method thereof

A carbon nanotube composite and carbon nanotube technology, which is applied in the field of polymer carbon nanotube composite structure and its preparation, can solve the problems of product instability and weak non-covalent bond force

Inactive Publication Date: 2009-09-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical modification method is to use surfactants, oligomers and polymers to physically adsorb and modify carbon nanotubes to enhance their solubility. However, due to the weak non-covalent bond force, the products are often unstable.

Method used

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  • Polymer carbon nano tube compound structure and preparation method thereof
  • Polymer carbon nano tube compound structure and preparation method thereof
  • Polymer carbon nano tube compound structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 1 mg of single-walled carbon nanotubes and add them to a test tube containing 3 ml of o-dichlorobenzene, and ultrasonicate for 3 h; at the same time, weigh 2 mg of high-density polyethylene and add them to a test tube containing 10 ml of o-dichlorobenzene Dissolve in a constant temperature oil bath set at 140°C; add the ultrasonically treated single-walled carbon nanotube suspension into the polyethylene solution, and keep the temperature at 140°C for 10 minutes; take out the mixed solution and let it cool down to room temperature naturally; filter and dry That is, a solid product is obtained. The SEM analysis spectrum of polyethylene / single-walled carbon nanotube composite structure is as follows figure 1 shown.

[0017] from figure 1 It can be seen that polyethylene platelets form a periodic arrangement on the surface of the single-walled carbon nanotubes, completely wrap the carbon nanotubes, and the carbon nanotubes are separated from each other.

[0018] T...

Embodiment 2

[0020] Weigh 1 mg of multi-walled carbon nanotubes and add them to a test tube containing 3 ml of dimethyl sulfoxide, sonicate for 3 hours; at the same time weigh 2 mg of polybutylene terephthalate and add them to a test tube containing 10 ml of dimethyl sulfoxide , placed in a constant temperature oil bath set at 240°C to dissolve; add the multi-walled carbon nanotube suspension after ultrasonic treatment into the polybutylene terephthalate solution, and keep the temperature at 240°C for 10 minutes; take out The mixed solution was allowed to cool down to room temperature naturally; the solid product was obtained by filtering and drying.

[0021] The TEM analysis spectrum of polybutylene terephthalate / multi-walled carbon nanotube composite structure is as follows image 3 shown, from image 3 It can be seen that the surface of the multi-walled carbon nanotubes is covered with a layer of polybutylene terephthalate, which also has good dispersion in xylene.

Embodiment 3

[0023] Weigh 1 mg of multi-walled carbon nanotubes and add them to a test tube containing 3 ml of o-dichlorobenzene, and ultrasonically treat them for 3 h; at the same time, weigh 2 mg of polypropylene and add them to a test tube containing 10 ml of o-dichlorobenzene, and set the temperature at Dissolve in a constant temperature oil bath at 180°C; add the multi-walled carbon nanotube suspension after ultrasonic treatment to the polypropylene solution, and keep the temperature at 180°C for 10 minutes; take out the mixed solution and let it cool down to room temperature naturally; filter and dry to obtain solid product.

[0024] The HR-TEM analysis spectrum of polypropylene / multi-walled carbon nanotube composite structure is as follows Figure 4 shown, from Figure 4 It can be seen that the surface of the multi-walled carbon nanotubes is covered with a layer of polypropylene, which has good dispersion in p-xylene.

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Abstract

The invention relates to a polymer carbon nano tube compound structure and a preparation method thereof and the structure is similar to shish-kebab crystal formed under polymer shear field. The preparation method includes the following steps: adding carbon nano tube to an organic solution by 0.01 to 0.1wt mass percent and forming a carbon nano tube suspension through ultrasonic dispersion; adding polymer to the organic solution by 0.01 to 10wt mass percent and heating to dissolve the polymer to obtain a polymer solution; dripping the carbon nano tube suspension to the polymer solution to form a mixed solution and maintaining constant temperature for 10 minutes; slowly cooling the mixed solution to room temperature and filtering to obtain the polymer carbon nano tube compound structure. The invention can increase the dispersibility of the carbon nano tube in polymer matrix and solution, therefore, the carbon nano tube is easy to be further processed. The invention can be also applied in modification of other nano tubes and nano lines, such as Ti2 nano pipe and PET fiber, etc.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotube surface treatment and carbon nanotube / polymer composite material preparation, and specifically relates to a polymer carbon nanotube composite structure with good dispersibility in a polymer matrix and a solvent and a preparation method thereof. Background technique [0002] Carbon nanotubes have super mechanical properties, large aspect ratio, good electrical properties, high chemical and thermal stability, etc., and have important applications in the fields of nano-devices, microelectronics, structural and functional composite materials, etc. prospect. However, due to their extremely small size, the exfoliation of carbon nanotube bundles, good dispersion in the matrix phase, and interfacial bonding are the bottlenecks in the preparation of carbon nanotube composites. Therefore, the controllable modification method of functionalized carbon nanotubes and functionalized units have important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K3/04C08L23/06C08L23/12C08L67/02C08J5/00
Inventor 张玲陶涛李春忠
Owner EAST CHINA UNIV OF SCI & TECH
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