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Liquid phase continuous mixing process of high dispersion carbon nanotube masterbatch and rubber product thereof

A technology of carbon nanotubes and masterbatch, which is applied in the field of liquid phase continuous mixing technology, can solve the problems of not reaching the performance of rubber products, the improvement of the performance of composite materials is not large, and the process is complicated.

Active Publication Date: 2016-04-06
SHANDONG DAZHAN NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rubber compound obtained by the above method often has disadvantages such as low strength, low elongation, low viscosity, and poor processability, and cannot reach the performance of rubber products.
In addition, because the carbon nanotubes have not been surface-treated, they are unevenly dispersed in the rubber, so that the structural uniformity of the composite material is poor, and the advantages of the carbon nanotubes in terms of mechanical properties and thermal conductivity cannot be well utilized. Not much
Patent CN1554693A discloses a kind of utilizing liquid nitrile rubber or liquid carboxylated nitrile rubber to prepare masterbatch, then masterbatch is mixed with hydrogenated nitrile butadiene rubber to prepare the method for carbon nanotube modified hydrogenated nitrile butadiene rubber; these prior art The method generally has the disadvantages of complex process, difficult to meet the quality of the prepared product, and limited application range.
[0008] Highly dispersed and highly oriented carbon nanotube rubber products are expected to be obtained in the field, but none of the existing technologies can achieve highly dispersed and highly oriented carbon nanotubes

Method used

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  • Liquid phase continuous mixing process of high dispersion carbon nanotube masterbatch and rubber product thereof
  • Liquid phase continuous mixing process of high dispersion carbon nanotube masterbatch and rubber product thereof
  • Liquid phase continuous mixing process of high dispersion carbon nanotube masterbatch and rubber product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] (1) comparative example

[0098] Common tread rubber (commonly used in all-steel wire radial tires) used as a comparative example is prepared according to the following dry mixing method: 100 parts by weight of masticated natural rubber, 1 part by weight of accelerator N-tert-butyl-2-benzo Thiazole hypoxanthamide, 5 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 1 part by weight of antioxidant N-isopropyl-N'-phenyl-p-phenylenediamine, 0.5 parts by weight of N,N'-m-phenylene Bismaleimide, 50 parts by weight of carbon black N330, 5 parts by weight of calcium carbonate, 3 parts by weight of environmentally friendly aromatic oil, 0.5 parts by weight of zinc soap salt, mixed evenly in an internal mixer, debinding at 140 ° C, and cooled Put it into an open mill to cover the rolls, add 2 parts by weight of sulfur, mix evenly, and release the sheet. After parking for 12 hours, vulcanize at 143° C. for 15 minutes to obtain a rubber product. Its product perfor...

Embodiment 1A

[0100] 1. Raw material preparation

[0101] a. Natural rubber latex

[0102] Natural Latex Components

[0103] Component

Content / parts by weight

Concentrated Latex (60%)

100

Potassium hydroxide

0.1

water

100

[0104] Stirring conditions: 2000-3000rpm, 2-5 minutes.

[0105] b. Carbon nanotube suspension

[0106] Carbon nanotube suspension components

[0107] Component

Content / parts by weight

carbon nanotubes

5

Sodium dodecyl sulfonate

0.8

Stabilizer polyethylene glycol

0.8

Dispersant water

100

[0108] Stirring conditions: 2000-3000rpm, 2-5 minutes.

[0109] c. Rubber compounding agent suspension

[0110] 1 part by weight of accelerator N-tert-butyl-2-benzothiazole inosinamide, 5 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 1 part by weight of anti-aging agent N-isopropyl-N'-phenyl p-Phenylenediamine, 0.5 parts by weight of N, N'-m-p...

Embodiment 1B

[0121] The rubber product of Example 1B was prepared by the dry mixing method of the ordinary tread rubber of the above comparative example, the only difference being that a masterbatch containing 1 part by weight of carbon nanotubes was added to the ordinary tread rubber formula, so The preparation method of the carbon nanotube master batch is the same as that of Example 1A, but wherein the solid content ratio of natural rubber / carbon nanotubes in the carbon nanotube master batch is 60 / 40, and the step 3) of preparing this master batch No rubber compounding agent suspension was added. Therefore, Example 1B is a rubber product prepared by using the carbon nanotube masterbatch of the present invention through ordinary dry mixing.

[0122] Table 1

[0123]

[0124]

[0125] As can be seen from the results shown in Table 1, compared with the tread rubber prepared by ordinary dry mixing, whether it is the natural rubber product or All compounding ingredients are prepared b...

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Abstract

The invention discloses a liquid phase continuous preparation method of a carbon nanotube masterbatch. The method includes: preparing a carbon nanotube suspension; concinuously dispersing and mixing the carbon nanotube suspension with a rubber solution / emulsion and an optional rubber compounding ingredient solution / suspension to obtain a carbon nanotube / rubber / solvent mixture; carrying out solidification and continuous extrusion on the carbon nanotube / rubber / solvent mixture simultaneously to realize carbon nanotube orientation, and removing water or the solvent to obtain the carbon nanotube / rubber mixture; and continuously drying the carbon nanotube / rubber mixture to obtain the carbon nanotube masterbatch. The invention also includes the carbon nanotube masterbatch obtained by the liquid phase continuous preparation method and the rubber product prepared from the carbon nanotube masterbatch.

Description

technical field [0001] The invention relates to the field of carbon nanotube / rubber composite materials, in particular to a liquid-phase continuous mixing process for carbon nanotube masterbatch, a method for preparing highly dispersed and highly oriented carbon nanotube masterbatch, and the application of these techniques in rubber products Applications. Background technique [0002] In the modern rubber industry, most rubbers must be reinforced to have practical values ​​such as high mechanical strength and long service life. In addition to the skeleton material, the most common way to strengthen rubber at present is to add various powdery or other shapes of reinforcing agents, such as nano-sized carbon black, silica or other hard particles, and various organic / inorganic short fibre. However, carbon black, short fibers and other organic reinforcing agents are completely dependent on the petroleum industry, so they are bound to be increasingly restricted as petroleum reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/00B29B13/06C08L7/02C08L9/08C08L11/02C08K9/04C08K7/00C08K3/04
CPCB29B7/00C08L7/00C08K3/041
Inventor 李岩徐泗蛟翟俊学尚积金耿磊
Owner SHANDONG DAZHAN NANO MATERIALS
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