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A kind of preparation method of rubber composition filled with carbon nanotubes

A rubber composition, carbon nanotube technology, applied in transportation and packaging, rolling resistance optimization, special tires, etc. question

Active Publication Date: 2021-05-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention not only effectively solves the problem of easy agglomeration of carbon nanotubes, but also solves the problem of poor bonding and uneven dispersion of carbon nanotubes and styrene-butadiene rubber matrix, and endows carbon nanotubes with high carbon nanotubes in styrene-butadiene rubber matrix dispersion

Method used

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  • A kind of preparation method of rubber composition filled with carbon nanotubes
  • A kind of preparation method of rubber composition filled with carbon nanotubes
  • A kind of preparation method of rubber composition filled with carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of highly dispersed carbon nanotubes:

[0038] a Preparation of carbon nanotubes by hydroxylation: 100 parts of carbon nanotubes, 150 parts of concentrated nitric acid, 10 parts of H 2 o 2 Put them together into the reactor and mix them, use 50kHz ultrasonic treatment for 1.0hr, then heat to 50°C, stir and cook with acid for 1hr, cool, filter with suction, wash until the filtrate is neutral, finally add 200 parts of ethylene glycol, and then heat to Stirring and reacting at 50° C. for 1 hr, suction filtration, washing, and drying to obtain carbon nanotube a with hydroxyl groups on the surface.

[0039] b Preparation of acylated styrene-butadiene latex: first add 100 parts of styrene-butadiene latex SBR1500, 1 part of sodium dodecylbenzenesulfonate emulsifier, 5 parts of CS 2 , stirring and heating, when the temperature of the polymerization tank reaches 25°C, quickly add 0.01 part of anhydrous aluminum trichloride under stirring conditions, until the s...

Embodiment 2

[0043] (1) Preparation of highly dispersed carbon nanotubes:

[0044] a Preparation of carbon nanotubes by hydroxylation: same as in Example 1.

[0045] The preparation of b acylated styrene-butadiene latex: with embodiment 1.

[0046] c Preparation of highly dispersed carbon nanotubes: Take 100 parts of carbon nanotubes a, 1.0 parts of ethylene glycol laurate, 350 parts of deionized water, and 2.0 parts of sodium hydroxide and add them to the polymerization tank and stir and mix for 20 minutes; then add 2.0 parts 1 part of sodium dodecylbenzenesulfonate, 3.0 parts of acylated styrene-butadiene latex a, stirred and heated to 60°C, stirred and reacted for 3 hours, washed, dehydrated, dried, and ground to obtain highly dispersed carbon nanotubes.

[0047] (2) Preparation of styrene-butadiene rubber composition for tread: take 100 parts of styrene-butadiene latex SBR1500 (dry rubber), 1.5 parts of sodium dodecylbenzene sulfonate, and 250 parts of deionized water and add them to ...

Embodiment 3

[0049] (1) Preparation of highly dispersed carbon nanotubes:

[0050] a Preparation of carbon nanotubes by hydroxylation: 100 parts of carbon nanotubes, 180 parts of concentrated nitric acid, 25 parts of H 2 o 2 Put them into the reactor and mix them together, treat with 60kHz ultrasonic wave for 1.5hr, then heat to 100°C, stir and cook with acid for 5hr, cool, filter with suction, wash until the filtrate is neutral, finally add 400 parts of ethylene glycol, and then heat to Stirring and reacting at 70° C. for 3 hours, suction filtration, washing and drying to obtain carbon nanotube b with hydroxyl groups on the surface.

[0051] b Preparation of acylated styrene-butadiene latex: first add 100 parts of styrene-butadiene latex SBR1500, 3 parts of sodium dodecylbenzenesulfonate emulsifier, 8 parts of CS 2 , stirring and heating, when the temperature of the polymerization tank reaches 35°C, quickly add 0.11 parts of anhydrous aluminum trichloride under stirring conditions, unti...

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Abstract

The object of the present invention is to provide a rubber composition filled with highly dispersed carbon nanotubes. The invention first carries out hydroxylation treatment on the surface of carbon nanotubes, then uses acid anhydride to acylate styrene-butadiene latex, and then prepares highly dispersed carbon nanotubes through coating treatment. The highly dispersed carbon nanotubes can be stably and uniformly dispersed in the styrene-butadiene rubber matrix in the form of fine particles without adding any surfactant, and can be mixed and coagulated with styrene-butadiene rubber latex to prepare high tensile strength, high A styrene-butadiene rubber composition for tire treads with wear resistance and low rolling resistance. The operation method of the invention is simple and suitable for industrialized production.

Description

technical field [0001] The invention relates to a rubber composition, in particular to a styrene-butadiene rubber composition filled with modified carbon nanotubes for tire treads and a preparation method thereof. Background technique [0002] In recent years, with the development of automobiles in the direction of high speed, safety, energy saving, and comfort, the requirements for high performance tires are also getting higher and higher, which requires that the performance balance of the "devil triangle" of tire tread rubber must be more obvious. That is to say, the tire tread rubber should not only have good wet skid resistance, but also have excellent wear resistance and low rolling resistance. With the emergence of high modulus and high strength carbon nanotubes (Carbon Nanotube, referred to as CNT), it will give high strength, low expansion, high wear resistance and other properties to polymer materials, and it will be used as a reinforcing filler for tire treads In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/08C08K9/04C08K9/10C08K7/24B60C1/00
CPCY02T10/86
Inventor 徐典宏梁滔刘敏朱晶丛日新张华强周雷
Owner PETROCHINA CO LTD
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