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Preparation method of rubber composition filled with carbon nanotubes

A technology of rubber composition and carbon nanotubes, applied in transportation and packaging, rolling resistance optimization, special tires, etc., can solve the problem of poor bonding between carbon nanotubes and styrene-butadiene rubber matrix, easy agglomeration of carbon nanotubes, uneven dispersion, etc. question

Active Publication Date: 2021-06-01
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

Method used

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  • Preparation method of rubber composition filled with carbon nanotubes
  • Preparation method of rubber composition filled with carbon nanotubes
  • Preparation method of rubber composition filled with carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of dispersed carbon nanotubes:

[0049] a Preparation of carbon nanotube hydroxylation: 100 parts of carbon nanotubes, 150 parts of concentrated nitric acid, 50 parts of concentrated sulfuric acid, and 10 parts of potassium permanganate were mixed in a reactor, treated with 60kHz ultrasonic waves for 1.2hr, and then heated to At 70°C, stir and cook with acid for 5 hours, cool, filter with suction, and wash until the filtrate is neutral. Finally, add 200 parts of ethylene glycol, heat at 60°C, stir and react for 2 hours, filter with suction, wash, and dry to obtain the surface band Carbon nanotubes with hydroxyl groups a.

[0050] b Preparation of grafted styrene-butadiene latex: first add 100 parts of deionized water to the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 3 parts of sodium dodecylbenzenesulfonate, and 0.08 parts of tertiary dodecyl mercaptan , after replacing with nitrogen, add 1.5 parts of acrylic acid, sti...

Embodiment 2

[0054] (1) Preparation of dispersed carbon nanotubes:

[0055] a Preparation of carbon nanotubes by hydroxylation: same as in Example 1.

[0056] The preparation of b grafted styrene-butadiene latex: with embodiment 1.

[0057] c Preparation of dispersed carbon nanotubes: Take 100 parts of carbon nanotubes a, 2.0 parts of ethylene glycol laurate, 350 parts of deionized water, and 2.5 parts of sodium hydroxide and add them to the polymerization kettle and stir and mix for 20 minutes; then add 2.5 parts Sodium dodecylbenzenesulfonate, 3.0 parts of grafted styrene-butadiene latex a, stirred and heated to 60°C, stirred and reacted for 3 hours, washed, dehydrated, dried and ground to prepare dispersed carbon nanotubes.

[0058] (2) Preparation of styrene-butadiene rubber composition for tread: take 100 parts of styrene-butadiene latex SBR1500 (dry rubber), 2 parts of sodium dodecylbenzenesulfonate, and 150 parts of deionized water and add them to the coagulation kettle and stir an...

Embodiment 3

[0060] (1) Preparation of dispersed carbon nanotubes:

[0061] a Preparation of carbon nanotube hydroxylation: 100 parts of carbon nanotubes, 170 parts of concentrated nitric acid, 60 parts of concentrated sulfuric acid, and 30 parts of potassium permanganate are mixed in a reactor, treated with 70kHz ultrasonic waves for 1.5hr, and then heated to At 90°C, stir and cook for 7hrs, cool, filter, and wash until the filtrate is neutral, then add 350 parts of ethylene glycol, heat to 60°C, stir and react for 3hrs, filter with suction, wash, and dry to obtain the surface band Carbon nanotubes with hydroxyl groups b.

[0062] b Preparation of grafted styrene-butadiene latex: first add 250 parts of deionized water to the polymerization kettle, then add 100 parts of styrene-butadiene latex SBR1500, 7 parts of sodium dodecylbenzenesulfonate, and 0.3 parts of tert-dodecyl mercaptan , after replacing with nitrogen, add 7.0 parts of acrylic acid, stir and heat, add 0.20 part of ammonium p...

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Abstract

The purpose of the present invention is to provide a method for preparing a rubber composition containing carbon nanotubes, which has high tensile strength, good wear resistance and low rolling resistance, and is used for tire treads. The invention first carries out hydroxylation treatment on the surface of carbon nanotubes, and then uses unsaturated carboxylic acid polar monomers to carry out graft polymerization on styrene-butadiene latex. Rubber composition for performance tire tread compounds. 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, endowing carbon nanotubes with high dispersion in rubber matrix .

Description

technical field [0001] The present invention relates to a rubber composition, in particular to a modified carbon nanotube-filled styrene-butadiene rubber used for tire tread 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 of tires are also getting higher and higher, which requires that the balance of "devil triangle" performance of tire tread rubber must be more obvious. That is to say, the tire tread compound has good anti-skid performance, but also has excellent wear resistance and low rolling resistance. With the emergence of carbon nanotubes (CNTs) with high modulus and high strength, high strength, low expansion, high wear resistance and other characteristics will be given to polymer materials, and they will be used as reinforcing fillers for tire treads. In the formula, the "devil triangle" proper...

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 徐典宏龚光碧魏绪玲赵洪国孟令坤张华强丛日新
Owner PETROCHINA CO LTD
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