A carbon material prepared by utilizing inorganic carbon to promote the carbonization of polyolefin and its preparation method

A technology of inorganic carbon material and polyolefin carbon, which is applied in inorganic chemistry, carbon preparation/purification, chemical instruments and methods, etc., can solve the problem that the structure of carbon materials is difficult to precisely control, difficult to form carbon, and lacks the controllable degree of carbonization of polyolefin. 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: 2022-05-24
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 is difficult to control precisely (products often have no regular morphology), and there is still room for improvement in carbonization efficiency
[0007] In summary, the existing technology still lacks a new polyolefin carbonization technology with the characteristics of mild conditions, no metal catalyst, no post-treatment, and high degree of carbonization control.

Method used

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  • A carbon material prepared by utilizing inorganic carbon to promote the carbonization of polyolefin and its preparation method
  • A carbon material prepared by utilizing inorganic carbon to promote the carbonization of polyolefin and its preparation method
  • A carbon material prepared by utilizing inorganic carbon to promote the carbonization of polyolefin and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Weigh 1 g of linear low-density polyethylene and 0.20 g of carbon black, and stir 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 for heating. Set the heating rate of the muffle furnace to 5°C / min, keep the temperature at 150°C for 1min, at 200°C, keep the temperature for 1min, set the carbonization temperature to 330°C, and keep the constant temperature at this temperature for 30min. After the crucible is naturally cooled, Carbon material is obtained. The mass of the product was weighed, and the yield of the carbon material was calculated to be 52.2 wt%.

[0042] Carbonized products prepared such as figure 1 shown in (a). The product was carbon black, solid and light, indicating that the mixture of linear low density polyethylene and carbon black was fully 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 the other steps remained unchanged. Carbonized product of density polyethylene and carbon black.

[0045] Carbonized products prepared such as figure 1 shown in (b). The product was carbon black, solid and light, indicating that the mixture of linear low density polyethylene and carbon black was 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 Example 1 was changed from carbon black to carbon nanotubes, the holding time was changed from 30min to 60min, and the other steps remained unchanged to obtain a carbonized product of linear low density polyethylene and carbon nanotubes.

[0048] Carbonized products prepared such as figure 1 shown in (c). 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 in particular relates to a carbon material prepared by utilizing inorganic carbon to promote polyolefin carbonization and a preparation method. The preparation method of the invention comprises the following steps: (1) uniformly mixing the polyolefin and the inorganic carbon material to obtain the mixture; (2) heating the mixture to a preset carbonization temperature for carbonization to obtain the carbon material. The present invention prepares functional carbon materials by promoting low-temperature carbonization of polyolefins with inorganic carbon, and the prepared carbon materials do not need to be post-treated, and the use of inorganic carbon catalysts also promotes the crosslinking reaction of polyolefins, effectively improving the carbonization yield, The carbonization temperature is reduced, and at the same time, it has the advantages of low catalyst price, low carbonization temperature, and high carbonization controllability. It 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 the carbonization of polyolefin and a preparation method. Background technique [0002] The wide use of plastic products, while facilitating our lives, inevitably produces a large amount of waste plastics. Plastics have good chemical stability and are difficult to degrade under natural conditions, often requiring dozens or even hundreds of years, resulting in serious problems. Environmental issues. Polyolefin plastic products, as the largest category of plastic products, mainly include 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 studies, a typical example is Vilas ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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