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Graphene oxide modified coal pitch binder and preparation method thereof

A graphene modification and coal pitch technology, applied in the field of materials, can solve problems such as limited modification effect, and achieve the effects of improving oxidation resistance, protecting the ecological environment, and reducing carbon consumption

Active Publication Date: 2019-05-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of improving the oxidation resistance of coal tar pitch and carbon electrodes is mainly achieved by adding some inorganic metal compounds, and the modification effect is limited.

Method used

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  • Graphene oxide modified coal pitch binder and preparation method thereof
  • Graphene oxide modified coal pitch binder and preparation method thereof
  • Graphene oxide modified coal pitch binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Media dispersion: Add the graphene oxide powder to high-purity absolute ethanol at a mass ratio of 10%, and apply ultrasonic waves (60KHz) to strengthen the dispersion for 60 minutes to obtain a uniformly dispersed mixed sol of graphene oxide.

[0023] Ingredients and mixing: the graphene oxide sol and coal tar powder obtained above are fully stirred and mixed according to the actual control in which the amount of graphene oxide is 1.0% (mass ratio) to obtain an intermediate mixture of graphene oxide-coal tar pitch-medium liquid.

[0024] Separation and purification: the obtained intermediate mixture is heated and stirred at 90-150°C to evaporate anhydrous ethanol, and then dried, and cooled to obtain a graphene oxide modified coal pitch binder.

[0025] The obtained graphene oxide modified coal tar pitch binder was tested at high temperature. The results showed that compared with the coal tar pitch (unmodified) under the same conditions, the obtained graphene oxide modified co...

Embodiment 2

[0027] The raw materials used are the same as in Example 1.

[0028] Media dispersion: Add the graphene oxide powder to high-purity absolute ethanol at a mass ratio of 10%, and apply ultrasonic waves (60KHz) to strengthen the dispersion for 60 minutes to obtain a uniformly dispersed mixed sol of graphene oxide.

[0029] Ingredients and mixing: the graphene oxide sol and coal tar powder obtained above are fully stirred and mixed according to the actual control in which the amount of graphene oxide is 1.0% (mass ratio) to obtain an intermediate mixture of graphene oxide-coal tar pitch-medium liquid.

[0030] Separation and purification: the obtained intermediate mixture is heated and stirred at 90-150°C to evaporate anhydrous ethanol, and then dried, and cooled to obtain a graphene oxide modified coal pitch binder.

[0031] The graphene oxide modified coal tar pitch binder was carbonized at 900°C, and the microstructure of the obtained solid sample was analyzed. The results showed that t...

Embodiment 3

[0033] The raw materials used are the same as in Examples 1 and 2.

[0034] Media dispersion: Add the graphene oxide powder to high-purity absolute ethanol at a mass ratio of 10%, and apply ultrasonic waves (60KHz) to strengthen the dispersion for 60 minutes to obtain a uniformly dispersed mixed sol of graphene oxide.

[0035] Ingredients and mixing: the graphene oxide sol and coal tar powder obtained above are fully stirred and mixed according to the actual control in which the amount of graphene oxide is 1.0% (mass ratio) to obtain an intermediate mixture of graphene oxide-coal tar pitch-medium liquid.

[0036] Separation and purification: the obtained intermediate mixture is heated, stirred and evaporated at 90-150°C to remove the absolute ethanol in it, and then dried, and cooled to obtain a graphene oxide modified coal pitch binder.

[0037] Kneading and sintering: The obtained graphene oxide modified coal pitch binder and solid carbon particles are mixed and kneaded at 100-150℃ a...

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Abstract

The invention relates to a preparation method of a graphene oxide modified coal pitch binder, The method comprises the following steps: fully mixing coal pitch serving as a basic raw material and graphene oxide serving as an additive (in a mass ratio of 0.2-2.0%) in an inert liquid medium, separating and purifying to prepare a modified coal pitch binder, and mixing the modified coal pitch binder with a solid carbon component by kneading according to the following ratio (15-30):(70-85) and performing high-temperature roasting to obtain the carbon electrode. The method has the advantages that the oxidation resistance of the carbon electrode prepared by the graphene oxide modified coal pitch binder is improved, so that the carbon consumption during the use of the electrode can be reduced, andthe carbon dioxide emission is reduced, which will be beneficial to the protection of the ecological environment.

Description

Technical field [0001] The invention belongs to the technical field of materials, and specifically relates to a graphene oxide modified coal pitch binder and a preparation method thereof. Background technique [0002] Coal tar pitch can be used as a binder and mixed with petroleum coke, graphite crushed or other solid carbon materials, and then processed by various processes to prepare carbon electrodes. It is widely used in steel metallurgy, non-ferrous metal metallurgy, chemical industry and other processes Process. Among them, a large part is used to produce metal aluminum in modern large-scale aluminum electrolytic cells. Since the performance of the binder is extremely important for the quality and performance of the overall carbon electrode products, the current process usually adopts the method of adding modifiers to improve the performance of the binder, so as to improve the performance of the carbon electrode products as a whole One of the important aspects is to impro...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M4/04
CPCY02E60/10
Inventor 薛济来路美妙刘轩刘世哲陈豪
Owner UNIV OF SCI & TECH BEIJING
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