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Method for preparing natural rubber-carbon nano tube composite material by using static electricity self-assembly

An electrostatic self-assembly and carbon nanotube technology, which is applied in the field of preparation of natural rubber composite materials, can solve the problems of energy consumption, environmental pollution, harm to the health of operators, etc., and achieves easy large-scale production, simple preparation process, and compatibility. good effect

Inactive Publication Date: 2009-04-29
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the mixing process of this method not only consumes energy but also pollutes the environment, it also seriously endangers the health of operators, and the dispersion effect of the added filling material in natural rubber is not satisfactory, resulting in unsatisfactory reinforcement effect

Method used

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  • Method for preparing natural rubber-carbon nano tube composite material by using static electricity self-assembly
  • Method for preparing natural rubber-carbon nano tube composite material by using static electricity self-assembly
  • Method for preparing natural rubber-carbon nano tube composite material by using static electricity self-assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Put 1 part of multi-walled carbon nanotubes prepared by gas-phase cracking method, with a diameter of 10-30nm, a length of 5-15μm, and a purity of ≥95.0%, in a flask filled with concentrated sulfuric acid and concentrated nitric acid solutions and boil to reflux After cooling for 1.5 hours, dilute with a large amount of deionized water, filter and wash the microporous membrane until neutral, and obtain surface-functionalized carbon nanotubes.

[0028] (2) The surface functionalized carbon nanotubes obtained in (1) and 0.5 parts of sodium lauryl sulfate are added to deionized water for 0.5 hours, and the pH is adjusted to 10, and then 0.1 parts of pH 10 are added thereto. Polydiallyldimethylammonium chloride was stirred with magnetic force for 5 hours and then washed with deionized water several times to remove excess surfactant to obtain an aqueous dispersion of carbon nanotubes.

[0029] (3) The carbon nanotube water dispersion obtained in (2) is added to 20 parts ...

Embodiment 2

[0032] (1) Put 0.5 parts of multi-walled carbon nanotubes prepared by gas-phase cracking, with a diameter of 10-30 nm, a length of 5-15 μm, and a purity of ≥95.0% in a flask filled with concentrated sulfuric acid and concentrated nitric acid solutions and boiled to reflux After cooling for 2 hours, dilute with a large amount of deionized water, filter and wash the microporous membrane until neutral, and obtain surface-functionalized carbon nanotubes.

[0033] (2) Add the surface-functionalized carbon nanotubes obtained in (1) and 0.25 parts of sodium lauryl sulfate into deionized water for 0.5 hours to sonicate, adjust the pH value to 10, and then add 0.05 parts of pH value to it. 10 polydiallyldimethylammonium chloride, magnetically stirred for 6 hours, and washed with deionized water several times to remove excess surfactant to obtain an aqueous dispersion of carbon nanotubes.

[0034] (3) the carbon nanotube aqueous dispersion obtained in (2) is added to 40 parts of pH valu...

Embodiment 3

[0037] (1) Put 0.8 parts of multi-walled carbon nanotubes prepared by gas-phase cracking method, with a diameter of 10-30nm, a length of 5-15μm, and a purity of ≥95.0%, in a flask filled with concentrated sulfuric acid and concentrated nitric acid solutions and boiled to reflux Cool for 1 hour, dilute with a large amount of deionized water, wash the microporous membrane with vacuum filtration until neutral, and obtain surface functionalized carbon nanotubes.

[0038] (2) Add the surface-functionalized carbon nanotubes obtained in (1) and 0.4 parts of sodium lauryl sulfate into deionized water for 0.5 hours to sonicate, adjust the pH to 10, and then dropwise add 0.08 parts of it to which the pH value is 10 The polydiallyldimethylammonium chloride was stirred magnetically for 7 hours, and then washed with deionized water several times to remove excess surfactant to obtain an aqueous dispersion of carbon nanotubes.

[0039](3) The carbon nanotube water dispersion obtained in (2) ...

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Abstract

The invention provides a method for utilizing electrostatic self-assembly to prepare a natural rubber-carbon nano-tube composite material. The method comprises the following steps of adopting surfactant to modify the surfaces of carbon nano-tubes so as to enable the surfaces of the carbon nano-tubes to have positive charges, directly mixing the carbon nano-tubes with lacteous natural rubber with negative charges and utilizing self-assembly in an electrostatic adsorption principle to prepare the natural rubber-carbon nano-tube composite material. The preparation method realizes that the carbon nano-tubes are uniformly dispersed in the natural rubber and have good compatibility with the natural rubber, thereby providing technical guarantee for preparing nano-composite rubber products with excellent comprehensive properties.

Description

[Field of invention] [0001] The invention relates to a method for preparing a natural rubber composite material, in particular to a method for preparing a natural rubber-carbon nanotube composite material by electrostatic self-assembly. [Background technique] [0002] Carbon nanotubes are a new type of carbon structure that was discovered in 1991. It is a seamless, hollow tube formed by graphene sheets formed by carbon atoms. Due to the small radial size of carbon nanotubes, the diameter of the tube is generally several nanometers to tens of nanometers, and the length of carbon nanotubes is generally several micrometers to tens of micrometers, so carbon nanotubes are considered to be a typical one. Dimensional nanomaterials. Carbon nanotubes have excellent mechanical properties, with a tensile strength of 50GPa to 200GPa, about a hundred times that of steel, but a density that is only one-sixth of steel. In addition, carbon nanotubes have many properties such as good chemi...

Claims

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Application Information

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IPC IPC(8): C08L7/02C08K9/00C08J3/215
Inventor 彭政冯春芳罗勇悦孔令学吕明哲李永振曾宗强
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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