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Carbon material prepared by utilizing inorganic carbon to promote polyolefin carbonization and preparation method

An inorganic carbon material, polyolefin carbon technology, applied in the direction of inorganic chemistry, carbon preparation/purification, chemical instruments and methods, etc., can solve the problem of difficult precise control of carbon material structure, difficulty in carbonization, and lack of controllable degree of carbonization in polyolefins Carbonization new technology and other issues, to achieve the effect of easy promotion and large-scale application, lower carbonization temperature, and obvious carbonization effect

Active Publication Date: 2021-05-25
HUAZHONG UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

Compared with the traditional carbonization process, this method not only greatly reduces energy loss, but also innovatively solves the problem that polyolefins are difficult to form into carbon without catalysts, and provides a feasible way for large-scale recycling of waste polyolefins in the future. New technology, however, the structure of carbon materials i

Method used

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  • Carbon material prepared by utilizing inorganic carbon to promote polyolefin carbonization and preparation method
  • Carbon material prepared by utilizing inorganic carbon to promote polyolefin carbonization and preparation method
  • Carbon material prepared by utilizing inorganic carbon to promote polyolefin carbonization and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Weigh 1 g of linear low density polyethylene and 0.20 g of carbon black, and mix them uniformly by ball milling to obtain a polyolefin-carbon black mixture.

[0041] (2) Put the polyolefin-carbon black mixture obtained in step (1) into a crucible, and then place it in a muffle furnace to raise the temperature. Set the heating rate of the muffle furnace to 5°C / min, at 150°C, keep warm for 1min, at 200°C, keep warm for 1min, set the carbonization temperature at 330°C, and keep at this temperature for 30min, after the crucible cools down naturally, to obtain carbon materials. The mass of the product was weighed, and the yield of carbon material was calculated to be 52.2wt%.

[0042] The prepared carbonized products such as figure 1 In (a) shown. The product is carbon black, solid and light, indicating that the mixture of linear low density polyethylene and carbon black has been completely carbonized at 330°C.

Embodiment 2

[0044] The mass of carbon black used in the above example 1 was changed from 0.20g to 0.35g, the heating rate was changed from 5°C / min to 35°C / min, the carbonization temperature was changed from 330°C to 300°C, and other steps remained unchanged, the linear low Carbonization product of density polyethylene and carbon black.

[0045] The prepared carbonized products such as figure 1 In (b) shown. The product was carbon black, solid and light, indicating that the mixture of linear low density polyethylene and carbon black had been completely carbonized under this condition, and the yield of carbon material was 54.9 wt%.

Embodiment 3

[0047] The carbon material catalyst used in the above-mentioned embodiment 1 was changed from carbon black to carbon nanotubes, the holding time was changed from 30 minutes to 60 minutes, and other steps remained unchanged to obtain the carbonized product of linear low density polyethylene and carbon nanotubes.

[0048] The prepared carbonized products such as figure 1 In (c) shown. The product was carbon black, solid and light, indicating that the mixture of linear low density polyethylene and carbon nanotubes had been completely carbonized under this condition, and the yield of carbon material was 58.0 wt%.

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Abstract

The invention belongs to the technical field of polymer carbonization, and particularly relates to a carbon material prepared by utilizing inorganic carbon to promote polyolefin carbonization and a preparation method. The preparation method comprises the following steps of (1) uniformly mixing polyolefin and an inorganic carbon material to obtain a mixture, and (2) heating the mixture to a preset carbonization temperature for carbonization to obtain the carbon material. The functional carbon material is prepared by promoting low-temperature carbonization of the polyolefin through inorganic carbon, the prepared carbon material does not need to be post-treated, and the crosslinking reaction of the polyolefin is promoted by using the inorganic carbon catalyst, so that the carbonization yield is effectively improved, the carbonization temperature is reduced, and meanwhile, the method has the advantages of low catalyst price, low carbonization temperature, high carbonization controllability and the like. The method has important guiding significance for large-scale treatment of waste polyolefin plastic products.

Description

technical field [0001] The invention belongs to the technical field of polymer carbonization, and in particular relates to a carbon material prepared by utilizing inorganic carbon to promote polyolefin carbonization and a preparation method. Background technique [0002] While the widespread use of plastic products facilitates our lives, it inevitably produces a large amount of waste plastics. The chemical stability of plastics is good, and it is difficult to degrade under natural conditions. It often takes dozens or even hundreds of years, thus causing serious damage. Environmental issues. Polyolefin plastic products are the largest category of plastic products, and the main types are polyethylene and polypropylene. Polyolefin is mainly composed of carbon and hydrogen, and the content of carbon is as high as 86%. Therefore, the preparation of carbon materials from polyolefins has great potential for industrial application. [0003] In the reported research, a typical exa...

Claims

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Application Information

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IPC IPC(8): C01B32/05C01B32/162
CPCC01B32/05C01B32/162
Inventor 龚江贾曼曼白慧颖刘宁郝亮牛冉
Owner HUAZHONG UNIV OF SCI & TECH
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