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High-conductivity carbon nanotube/rubber nanocomposite and preparation method thereof

A carbon nanotube and rubber nanotechnology, which is applied in the field of highly conductive carbon nanotube/rubber nanocomposite materials, can solve the problems of limited reinforcement of composite materials, poor aspect ratio of carbon tubes, and expected improvement in rubber properties. Achieve the effect of maintaining integrity and high aspect ratio

Active Publication Date: 2014-04-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the researchers found that the poor dispersion of carbon nanotubes in the rubber matrix and their weak interfacial bonding with the rubber matrix made the addition of carbon nanotubes not bring the expected improvement in the properties of the rubber. The blending process causes the carbon nanotubes to suffer a certain degree of structural damage, such as the lack of a relatively large length and diameter, which greatly reduces the reinforcing effect of carbon nanotubes on rubber.
A.Fakhru'l-Razi et al. (Composite Structures, 2006, 75(1-4): 496500) etc. laid the film by solvent method, adding carbon nanotubes to the polymer solution, and then evaporating the solvent to obtain carbon nanotubes Tube / natural rubber composite material, although the aspect ratio of some carbon nanotubes even reaches more than 1000, the aspect ratio of many carbon nanotubes is about 50, and the aspect ratio of its carbon tubes is not as uniform as that of the present invention, and the carbon nanotubes The strengthening of the composite material by tubes is quite limited, adding 10 parts of carbon nanotubes, its strength is only about 2.5MPa

Method used

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  • High-conductivity carbon nanotube/rubber nanocomposite and preparation method thereof
  • High-conductivity carbon nanotube/rubber nanocomposite and preparation method thereof
  • High-conductivity carbon nanotube/rubber nanocomposite and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Take 0.27 parts of carbon nanotube bundles (0.25 parts of carbon nanotubes are converted into carbon nanotubes by mass of carbon nanotube bundles × content of carbon nanotubes, wherein the diameter of carbon nanotubes is 8-10 nanometers, and the average length is 50-100 microns), 0.5 parts of dodecane The carbon nanotubes were preliminarily dispersed in 62.5 parts of deionized water by vibrating in a 100W ultrasonic water bath for 30 minutes, and the carbon nanotubes were dispersed in deionized water as a single tube by ultrasonication with a 500W ultrasonic cell disruptor for 60 minutes.

[0033] Add the carbon nanotube dispersion to 95.9 parts of pre-vulcanized natural rubber latex (the composition containing pre-vulcanized natural rubber latex includes: 4.2 parts of vulcanization aids, 8.4 parts of emulsifiers), mix well, dip into the film, and dry at 40 ° C After 36 hours and 70°C vulcanization for 4 hours, the carbon nanotube bundle / natural rubber composite material...

Embodiment 2

[0038] Take 1.07 parts of carbon nanotube bundles (converted to 1 part of carbon nanotubes by mass of carbon nanotube bundles × 93%, the diameter of carbon nanotubes is 8-10 nanometers, and the average length is 50-100 microns), 4 parts of sodium lauryl sulfate, The carbon nanotubes were preliminarily dispersed in 250 parts of deionized water by shaking in a 200W ultrasonic water bath for 20 minutes, and the carbon nanotubes were dispersed in deionized water as a single tube by ultrasonication for 40 minutes by an 850W ultrasonic cell disruptor.

[0039] Add the carbon nanotube dispersion to 201 parts of pre-vulcanized natural rubber latex (the composition containing pre-vulcanized natural rubber latex includes: 8.35 parts of vulcanization aids, 25.05 parts of emulsifiers), mix well, dip into the film, and dry at 50 ° C After 24 hours and 80°C vulcanization for 2 hours, the carbon nanotube bundle / natural rubber composite material was obtained after leaching and drying. The con...

Embodiment 3

[0043] Take 3.2 parts of carbon nanotubes through carbon nanotube bundles (the mass of carbon nanotube bundles × 94% is converted into 3 parts of carbon nanotubes, the diameter of carbon nanotubes is 8-10 nanometers, and the average length is 50-100 microns), 15 parts of dodecyl Sodium sulfate, the carbon nanotubes were preliminarily dispersed in 750 parts of deionized water by shaking in a 300W ultrasonic water bath for 10 minutes, and the carbon nanotubes were dispersed in deionized water as a single tube by ultrasonication of 1000W ultrasonic cell disruptor for 10 minutes.

[0044] Add the carbon nanotube dispersion to 293 parts of pre-vulcanized natural rubber latex (the composition containing pre-vulcanized natural rubber latex includes: 16.7 parts of vulcanization aids, 66.8 parts of emulsifiers), mix well, dip into the film, and dry at 60 ° C for 18 hours, 100°C vulcanization for 0.5 hours, and then leaching and drying to prepare carbon nanotube bundles / natural rubber co...

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Abstract

The invention provides a high-conductivity carbon nanotube / rubber nanocomposite and preparation method thereof, and belongs to the field of nanocomposite technology. The invention employs an oriented growth carbon nanotube bundle, and the oriented growth carbon nanotube bundle is added into a surfactant aqueous solution, and is subjected to ultrasonic treatment with different powers in sequence, thereby ensuring the carbon nanotubes are uniformly dispersed in water. The carbon nanotube dispersion liquid and the pre-vulcanized latex are mixed, after mechanical stirring and uniformly mixing, the carbon nanotube / latex mixing liquid is poured into an organic glass mould by using a dipping and film spreading process, and the liquid is dried at room temperature for vulcanizing moulding. The carbon nanotube in the obtained carbon nanotube / rubber composite material prepared by the method has the advantages of higher length-diameter ratio and better dispersibility, good compatibility with rubber matrix, and substantially increased conductivity of vulcanizate.

Description

technical field [0001] The invention belongs to the technical field of rubber nanocomposite materials, in particular to a highly conductive carbon nanotube / rubber nanocomposite material. The carbon nanotube has a relatively high length-to-diameter ratio and good dispersion, which can significantly improve the conductivity of rubber. technical background [0002] Rubber is a polymer material with high elasticity at room temperature. It has excellent elasticity, insulation, air tightness, aging resistance, and acid and alkali resistance. Vulcanized rubber is used in a wide range of fields, among which conductive rubber is found in various industries closely related to people's lives, such as automobiles, aircraft, electrical appliances, computers, national defense, military, aerospace, construction, and medical treatment. However, with the rapid development of science and technology, people put forward higher and higher requirements for the conductive properties of rubber, suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/08C08L9/04C08L7/02C08K13/06C08K9/04C08K7/00C08K3/04C08K3/06C08K3/22
Inventor 卢咏来贺存哲张立群冯予星田明刘力
Owner BEIJING UNIV OF CHEM TECH
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