Preparation method of pre-dispersed carbon nano-tube rubber masterbatches

Abstract

The invention belongs to the field of materials and specifically relates to a preparation method of pre-dispersed carbon nano-tube rubber masterbatches. The method is characterized in that the rubber masterbatches comprise the following ingredients, by weight, 5-100 parts of carbon nano-tube, 5-100 parts of rubber, 5-100 parts of wax, 0.5-50 parts of a dispersing aid, 0.5-5 parts of an anti-aging agent and 0.1-10 parts of an activator. The preparation method of the rubber masterbatches comprises the following specific steps: carrying out high-speed shearing on the above ingredients, mixing, carrying out in situ activated modification on carbon nano-tube such that carbon nano-tube is uniformly dispersed and has no micron-scale aggregate, and pelleting so as to obtain the pre-dispersed high-concentration carbon nano-tube rubber masterbatches. By the use of the pre-dispersed carbon nano-tube rubber masterbatches prepared by the above formula and method, tear strength of tire tread rubber can be raised by about 5-10% and even more, wear volume of Akron is reduced by about 30% and even more, volume resistivity is minimized by two orders of magnitudes, and mechanical properties such as tensile strength, elongation at break and the like are basically unchanged or increased a little.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method of pre-dispersed carbon nanotube rubber masterbatch. Background technique [0002] The hardness or modulus of carbon nanotubes is comparable to that of diamond, and the Young's modulus is about 1.8TPa; the tensile strength is about 200GPa, which is 100 times stronger than steel, but its weight is only 1 / 6 to 1 / 7 of the latter. At the same time, the elastic strain of carbon nanotubes can reach up to about 12%, which has good flexibility like a spring. The electrical conductivity of carbon nanotubes can reach 10,000 times that of copper, and the thermal conductivity is also very good. Therefore, carbon nanotubes are called "super fibers". Since carbon nanotubes have a surface structure and chemical composition similar to carbon black, they are ideal reinforcing fillers that can be used in rubber composites, endowing rubber products with high strength, hig...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the preparation method still belongs to the category of small laboratory experiments, and the powdery carbon nanotubes are also unavoidable, easily flying, polluting, and difficult to transport.

Its shortcoming of above-mentioned method is: preparation method still belongs to the category of laboratory small test, can not be applied in the large-scale rubber industrial production

The disadvantages of the above method are: the preparation method also cannot avoid the powdery carbon nanotubes being easy to fly, causing great pollution, difficult to transport, and difficult to apply to large-scale rubber industrial production.

The disadvantages of this method are: the preparation method still belongs to the category of small laboratory experiments, and the powdery carbon nanotubes are also unavoidable, easily flying, polluting, and difficult to transport.

However, this method is only suitable for special occasions such as conductive inks, and is far from meeting the needs of the rubber industry and other polymer industries.

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