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Preparation method of high-modulus low-heat carbon nano tube/ rubber composite material

A technology of carbon nanotubes and composite materials, which is applied in the preparation of carbon nanotubes/rubber composite materials with low heat generation and high modulus. The effect of improving the tensile strength

Active Publication Date: 2013-02-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since carbon nanotubes exist in the form of longer tubes in the rubber matrix, they rub repeatedly during dynamic operation, resulting in greater heat generation

Method used

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  • Preparation method of high-modulus low-heat carbon nano tube/ rubber composite material
  • Preparation method of high-modulus low-heat carbon nano tube/ rubber composite material
  • Preparation method of high-modulus low-heat carbon nano tube/ rubber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 5.5 g of carbon nanotubes were placed in a plasma reaction vessel, vacuumed to 20 Pa, argon was introduced, and the chamber pressure was adjusted to 40 Pa; the preheating time was 5 minutes. Afterwards, treat with glow discharge for 7 minutes at a power of 50W, stop the glow discharge reaction, take out the carbon nanotubes, and park them in the air for 5 minutes; in a 4000ml beaker, add 2500ml of deionized water, 120ml of acrylic acid, 1g of ammonium persulfate, and modify The final carbon nanotubes were stirred at 80°C for 24 hours; the obtained product was centrifuged, the lower layer of solid was removed, washed 4 times with acetone until pure, and then vacuum-dried at 80°C for 24 hours to complete the modification of carbon nanotubes.

[0024] Using the mechanical blending method, 2phr of silane coupling agent Si69 and 10phr of modified carbon nanotubes were added to 100phr of natural rubber NR. On-machine heat roller treatment with a treatment time of 4 minutes. ...

Embodiment 2

[0031] 5.5 g of carbon nanotubes were placed in a plasma reaction vessel, vacuumed to 20 Pa, argon was introduced, and the chamber pressure was adjusted to 40 Pa; the preheating time was 5 minutes. Afterwards, treat with glow discharge for 7 minutes at a power of 50W, stop the glow discharge reaction, take out the carbon nanotubes, and park them in the air for 5 minutes; in a 4000ml beaker, add 2500ml of deionized water, 120ml of acrylic acid, 1g of ammonium persulfate, and modify The final carbon nanotubes were stirred at 80°C for 24 hours; the obtained product was centrifuged, the lower layer of solid was removed, washed 4 times with acetone until pure, and then vacuum-dried at 80°C for 24 hours to complete the modification of carbon nanotubes.

[0032] Adopt mechanical blending method, the carbon nanotube after the silane coupling agent Si75 of 2phr and 10phr modification is added in the polyisoprene rubber IR of 100phr, park after 2 hours, mix the above-mentioned obtained rub...

Embodiment 3

[0037] 5.5 g of carbon nanotubes were placed in a plasma reaction vessel, vacuumed to 20 Pa, and oxygen was introduced to adjust the chamber pressure to 40 Pa; the preheating time was 5 minutes. Afterwards, treat with glow discharge for 7 minutes at a power of 50W, stop the glow discharge reaction, take out the carbon nanotubes, and park them in the air for 5 minutes; in a 4000ml beaker, add 2500ml of toluene solvent, 120ml of acrylic acid, 1g of ammonium persulfate, after modification The carbon nanotubes were stirred at 80°C for 24 hours; the obtained product was centrifuged, the lower layer of solid was removed, washed 4 times with acetone until pure, and then vacuum-dried at 80°C for 24 hours to complete the modification of carbon nanotubes.

[0038] Using the mechanical blending method, 3 phr of silane coupling agent Si69 and 10 phr of modified carbon nanotubes were added to 100 phr of styrene-butadiene rubber SBR. Carry out hot roll treatment on the mill, and the treatme...

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Abstract

A preparation method of a high-modulus low-heat carbon nano tube / rubber composite material belongs to the technical field of rubber nano composite materials and is characterized in that a method of plasma modification is utilized to precipitate a polyacrylic acid amorphous layer of 1-2nm on the surface of the carbon nano tube, the modified carbon nano tube and a silane coupling agent are added into rubber through a mechanical blending method, heating roller processing technology under high temperature state is adopted to further strengthen the interface combination effect and improve dispersion, and the modified carbon nano tube / rubber composite material is obtained by vulcanization under high temperature high pressure state. The carbon nano tube is a common carbon nano tube or a carbon nano tube with a one-dimension orientation arrangement structure, and the rubber is natural rubber, polyisoprene rubber, butadiene styrene rubber or butadiene rubber. The composite material prepared by the method greatly improves tensile strength, remarkably improves modulus, and simultaneously greatly compresses heating quantity.

Description

technical field [0001] The invention belongs to the technical field of rubber nanocomposite materials, in particular to a method for preparing a carbon nanotube / rubber composite material with high modulus and low heat generation. Background technique [0002] Rubber is widely used in the preparation of automobile tires, conveyor belts, and various sealing devices due to its good elasticity, insulation, and air tightness. However, with the development of science and technology and the continuous expansion of the application field of rubber, people have put forward higher and more requirements for the strength and functionality of rubber. [0003] Carbon nanotubes (CNTs) refer to a seamless tubular substance with a diameter of nanometers, which is formed by curling one or more layers of graphite sheets according to a certain helical angle. Carbon nanotubes have excellent mechanical, electrical and thermal properties, low density and good structural stability, so they show goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/00C08L9/06C08K13/06C08K9/10C08K9/00C08K7/00C08K3/04C08K5/548C08K5/544C08K5/5419C08F292/00C08F220/06
Inventor 卢咏来于海涛王文才张立群冯予星刘力
Owner BEIJING UNIV OF CHEM TECH
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