Method for modifying carbon black to improve performance of carbon black filled rubber through irradiation of electron beams

A technology of electron beam irradiation and rubber filling, which is applied in the direction of fibrous filler and dyeing physical treatment, can solve the problems of environmental pollution and harmful rubber performance, and achieve the effects of small environmental pollution, low cost and pollution avoidance

Active Publication Date: 2014-07-02
BEIJING UNIV OF CHEM TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic modification technology of reinforcing materials (carbon black, white carbon black) is mainly chemical modification, that is, through the interaction of some chemical substances and reinforcing materials, the surface functional groups of the reinforcing materials are combined with chemical bonds. One end of this type of chemical substance is connected to the reinforcing material, and the other end has better compatibility and reaction tendency with the rubber molecular chain, thereby improving the effect of the reinforcing material and the rubber molecular chain, and achieving the effect of improving the reinforcing effect, but This kind of modification method also has obvious disadvantages. The remaining substances in this kind of substances do not react with the reinforcing material and the rubber molecular chain, which is harmful to the performance of the rubber. At the same time, it will slowly change from the rubber pollute the environment

Method used

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  • Method for modifying carbon black to improve performance of carbon black filled rubber through irradiation of electron beams
  • Method for modifying carbon black to improve performance of carbon black filled rubber through irradiation of electron beams
  • Method for modifying carbon black to improve performance of carbon black filled rubber through irradiation of electron beams

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Modification method of N234 irradiation:

[0033] Put 150g N234 evenly in a sealed glass box, the current of the electron beam irradiation device is 10mA, the voltage is 10MeV, and the irradiation dose is 300kGy to 500kGy.

[0034]

[0035] It can be seen from Table 1 that when N234 is modified with an irradiation dose of 300kGy to 500kGy, the oxygen element content on the surface of carbon black increases by 89%. The resulting defects react with oxygen molecules or oxygen free radicals (generated by high-energy electron beam radiation) on the surface of carbon black, which increases the oxygen-containing functional groups on the surface of carbon black

[0036]

[0037] It can be seen from Table 2 that when the irradiation dose of N234 is modified from 300kGy to 500kGy, the specific surface area increases, the average particle size of carbon black decreases and the uniformity of particle size distribution becomes better. Due to the bombardment of high-energy elect...

Embodiment 2

[0041] Irradiation modified N330:

[0042] Place 150g N330 evenly in a sealed glass box, the current of the electron beam irradiation device is 10mA to 20mA, the voltage is 10MeV to 30MeV, and the irradiation dose is 200kGy to 400kGy.

[0043]

[0044] It can be seen from Table 4 that the surface oxygen content of N330 increased by 52.3% after being modified by electron beam irradiation. This is due to the fact that during the irradiation process, the high-energy electron beam bombards the carbon black, causing the defects on the surface of the carbon black to react with the oxygen molecules or oxygen free radicals (generated due to the high-energy electron beam radiation) on the surface of the carbon black, making the carbon black The oxygen-containing functional groups on the black surface increased.

[0045]

[0046]

[0047] It can be seen from Table 5 that the specific surface area of ​​N330 increases after being modified by electron beam irradiation, the averag...

Embodiment 3

[0051] Modification method of N660 electron beam irradiation:

[0052] Place 150g N660 evenly in a sealed glass box, the current of the electron beam irradiation device is 20mA to 40mA, the voltage is 8MeV to 40MeV, and the irradiation dose is 200kGy to 00kGy.

[0053]

[0054] It can be seen from Table 7 that the surface oxygen content of N660 increased by 106.9% after electron beam irradiation modification. This is due to the fact that during the irradiation process, the high-energy electron beam bombards the carbon black, causing the defects on the surface of the carbon black to react with the oxygen molecules or oxygen free radicals (generated due to the high-energy electron beam radiation) on the surface of the carbon black, making the carbon black The oxygen-containing functional groups on the black surface increased.

[0055]

[0056] It can be seen from Table 8 that the specific surface area of ​​N660 increases after being modified by electron beam irradiation, ...

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Abstract

The invention discloses a method for modifying carbon black to improve the performance of carbon black filled rubber through the irradiation of electron beams, relating to the field of material preparation, inorganic materials and polymer materials. The method for modifying carbon black to improve the performance of carbon black filled rubber through the irradiation of electron beams is characterized in that carbon black is modified through the irradiation of an electron beam irradiation device, so that the specific surface area, average grain diameter, particle size distribution uniformity and surface oxygen-contained functional group content of carbon black are changed, and the change of the characters ensures that the interaction of carbon black rubber is changed when the carbon black modified through irradiation is filled into rubber. The irradiation parameters are as follows: the irradiation voltage range is 1-50MeV; the digit rate range is 1-40mA; the irradiation dose range is 100-600kGy. The specific surface area and average particle size of the modified carbon black disclosed by the invention are reduced, the particle size distribution uniformity of the modified carbon black is improved, and meanwhile, the surface oxygen-contained functional group content is increased. The actions of carbon black filler and rubber molecular chains are enhanced, and the performance of the filled rubber is improved.

Description

technical field [0001] The invention relates to the fields of material preparation, inorganic materials and polymer materials, in particular to a method for modifying carbon black through electron beam irradiation technology, and the radiation-modified carbon black can improve the performance of its filling rubber Background technique [0002] Carbon black is the most important reinforcing agent in the tire industry, especially in the rubber industry. The addition of carbon black can enhance the wear resistance, shear resistance, tear resistance, grip, hardness and strength of vulcanized rubber. However, as the concept of environmental protection is deeply rooted in the hearts of the people, higher requirements have been put forward for the environmental protection and energy saving of automobiles. During the driving process of the car, a lot of fine rubber particles will be produced due to the wear of the tires. The generation of these particles has made a certain contribut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/00C08K3/04C08L21/00C09C1/44C09C3/04
Inventor 刘力吴永鹏姜健温世鹏胡水卢咏来
Owner BEIJING UNIV OF CHEM TECH
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