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Carbon nanotube doped ionic liquid modified butyl rubber elastomer and preparation method

A carbon nanotube and butyl rubber technology is applied in the field of preparation of ionic liquid-modified butyl rubber elastomers, which can solve problems such as the inability to achieve effective dispersion of carbon nanotubes and hinder the research and development of rubber composite materials.

Active Publication Date: 2021-04-20
华碳研发(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this non-covalent modification method cannot achieve effective dispersion of carbon nanotubes in rubber elastomers, which hinders the development of antistatic (or high dielectric constant) rubber composites.

Method used

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  • Carbon nanotube doped ionic liquid modified butyl rubber elastomer and preparation method
  • Carbon nanotube doped ionic liquid modified butyl rubber elastomer and preparation method

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Effect test

preparation example Construction

[0032] refer to figure 2 Shown, the present invention also provides the preparation method of the ionic liquid modified butyl rubber elastomer of described carbon nanotube doping, it comprises the following steps:

[0033] Step (1) Adding bromobutyl rubber and imidazole molecular additives to the rubber mixer, the molar ratio of addition is: imidazole: bromine group = 1.5:1.

[0034] Step (2) Add carbon nanotube powder to the mixture in the above step (1), and the mass ratio is: mixture:CNT=100:2-5.

[0035] Step (3) For the mixture of the above step (2), first heat up to 60°C, stir and mix at 100 rpm for 1 hour, then heat up to 140°C, and solidify and mold under a pressure of 150kN for 2 hours to obtain a sheet Composite rubber elastomer sheet.

Embodiment 1

[0037] First weigh the brominated butyl rubber, add 1.5 times 1-methylimidazole according to the molar ratio of the relative bromine content, and then add 2wt% carbon nanotube powder in the rubber mixer at 60 ° C, 100 rpm, stirring and mixing for 1 hours, then heated up to 140°C, and cured under a pressure of 150kN for 2 hours to obtain a sheet-like composite rubber elastomer sheet.

[0038] The test results of the composite material made in this example: the tensile strength is 21.9MPa, the elongation at break is 10.6 times, the dielectric constant is 21 and the conductivity is 1.1×10 -5 S / cm.

Embodiment 2

[0040] First weigh the brominated butyl rubber, add 1.5 times 1-ethylimidazole according to the molar ratio of the relative bromine content, and then add 2.5wt% carbon nanotube powder in the rubber mixer at 60°C and 100 rpm to stir and mix 1 hour, then heated up to 140°C, and cured and molded under a pressure of 150kN for 2 hours to obtain a sheet-shaped composite rubber elastomer sheet.

[0041] The test results of the composite material obtained in this example: the tensile strength is 17.8MPa, the elongation at break is 10.1 times, the dielectric constant is 23 and the electrical conductivity is 1.5×10 -5 S / cm.

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Abstract

The invention provides a carbon nanotube-doped ionic liquid modified butyl rubber elastomer, the butyl rubber elastomer is a carbon nanotube-doped imidazole ionic liquid modified brominated butyl rubber, which is composed of bromine It is prepared by mixing butyl rubber, imidazole molecular additive and carbon nanotube powder. The butyl rubber elastomer has a high degree of ionization modification, good dispersion performance of carbon nanotubes, no further vulcanization treatment is required, and the prepared butyl rubber elastomer doped with carbon nanotubes has a tensile strength higher than 15MPa , The elongation at break can be close to 10 times. The prepared carbon nanotube-doped ionic liquid modified butyl rubber elastomer has a dielectric coefficient of more than 20 and an electrical conductivity of 10 at a frequency of 100 Hz at room temperature. ‑5 S / cm, it has high self-healing ability under hot pressing. The invention provides a preparation method of the butyl rubber elastomer.

Description

technical field [0001] The invention relates to the field of high dielectric rubber composite materials, in particular to a preparation method of carbon nanotube-doped ionic liquid modified butyl rubber elastomer. Background technique [0002] Butyl rubber (IIR) is a synthetic rubber formed by the copolymerization of isobutylene and a small amount of isoprene. Because of its high mechanical strength, good elasticity, chemical resistance and excellent air and water tightness, butyl rubber is widely used in the production of automobile tires, adhesives, sports equipment and medical rubber and other products. In particular, bromobutyl rubber (BIIR) is an irreplaceable raw material for the manufacture of tubeless tires. After the bromination treatment, the butyl rubber is more easily vulcanized, thus exhibiting better anti-aging performance and achieving the effect of enhancing the durability of the tire. Unfortunately, the loss of physical properties due to tribostatic electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/36C08K3/04C08J5/18C08F8/30C08F210/12
Inventor 陈振赵琦杨劲光
Owner 华碳研发(深圳)有限公司
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