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Method for numerously preparing asphalt-based graphene material with low cost

A graphene and pitch-based technology, applied in the field of carbon materials, can solve problems that hinder the promotion and application of graphene materials, environmental pollution, and complex processes, and achieve the effects of easy large-scale production, wide application, and simple process equipment

Inactive Publication Date: 2012-03-21
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of graphite materials by the above method still has problems such as complex process, high cost, dangerous operation, environmental pollution, etc., and it is difficult to prepare graphene materials in large quantities, which greatly hinders the promotion and application of graphene materials

Method used

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  • Method for numerously preparing asphalt-based graphene material with low cost
  • Method for numerously preparing asphalt-based graphene material with low cost
  • Method for numerously preparing asphalt-based graphene material with low cost

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Grind the coal tar pitch to 200 mesh and put it into the polymerization kettle. Before 100°C, the temperature is raised freely, and after 100°C, the temperature is raised at a speed of 20°C / min, and nitrogen is introduced from the beginning of the temperature rise. 2 , N 2 The flow rate is 50mL / min. When the temperature rises to 300°C, adjust the rotational speed to 1000rpm and stir for 5 hours to obtain prepared asphalt. Put the prepared asphalt into the atmosphere furnace (N 2 The flow rate is 50 mL / min), and then the temperature is raised to 500 °C at 2 °C / min and then kept for 10 h, and the pyrolysis product is taken out after cooling to room temperature with the furnace. Put the pyrolysis product into a vacuum furnace (vacuum degree 100 Pa), then raise the temperature to 2200 °C at 2 °C / min, keep it for 5 h, and take it out with the furnace cooling to room temperature to obtain the graphene material. The prepared graphene material has the following properties: t...

Embodiment 2

[0044] Grind the mesophase pitch to 200 mesh and put it into the polymerization tank. Before 200°C, the temperature is raised freely, and after 200°C, the temperature is raised at a speed of 10°C / min, and Ar is introduced from the beginning of the temperature rise. 2 , Ar 2 The flow rate is 100mL / min. When the temperature rises to 400°C, adjust the rotational speed to 50rpm and stir for 1 hour to obtain prepared asphalt. Put the prepared asphalt into the atmosphere furnace (N 2 The flow rate is 50mL / min), and then the temperature is raised to 1000°C at 100°C / min and then kept for 5 hours, and the pyrolysis product is taken out after cooling to room temperature with the furnace. Put the pyrolysis product into a vacuum furnace (vacuum degree 1.0×10 3 Pa), then heated up to 1900°C at 20°C / min and kept for 0.1 h, then cooled to room temperature with the furnace and taken out to obtain graphene materials. The prepared graphene material has the following properties: the yield i...

Embodiment 3

[0046] Weigh coal tar pitch and petroleum pitch at a ratio of 50:50 (weight ratio), grind them to 200 mesh and put them into a polymerization kettle. Before 100°C, the temperature is raised freely, and after 100°C, the temperature is raised at a speed of 5°C / min. Into N 2 , N 2 The flow rate is 200mL / min. When the temperature rises to 200°C, adjust the rotational speed to 500rpm and stir for 4 hours to obtain prepared asphalt. Put the prepared pitch into the atmosphere furnace (Ar 2 The flow rate is 200mL / min), and then the temperature is raised to 500°C at 2°C / min, and then kept for 10h, and the pyrolysis product is taken out after cooling to room temperature with the furnace. Put the pyrolysis product into a vacuum furnace (vacuum degree 10 Pa), then raise the temperature to 2000 °C at 50 °C / min, keep it for 10 h, and take it out as the furnace cools to room temperature to obtain the graphene material. The prepared graphene material has the following properties: the yiel...

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Abstract

The invention discloses a method for numerously preparing a graphene material, which takes asphalt as a raw material and comprises the processes of preparing, pyrolyzing and carrying out carbonization. Compared with the conventional preparation of the graphene material, the method disclosed by the invention has low preparation cost, little equipment investment, simplicity for operating, no pollution, and easiness for realizing industrialization; and in addition, the purity of a product is high, the structure defect of the product is little, and the performance of the product is excellent.

Description

technical field [0001] The invention belongs to the field of carbon materials, and mainly relates to the macro-preparation technology of low-cost pitch-based graphene materials (including single-layer, multi-layer graphene and graphene nano-chips). Background technique [0002] Graphene is a new carbonaceous material that is densely packed into a two-dimensional honeycomb lattice structure by a single layer of carbon atoms. the basic unit of . Graphene materials (including single-layer, multi-layer graphene and graphene nanoplatelets) have excellent electrical, thermal and mechanical properties, and can be used in high-performance nanoelectronic devices, composite materials, field emission materials, gas sensors and energy storage, etc. field has been widely applied. At present, the methods for preparing graphene materials mainly include mechanical methods and chemical methods. Mechanical methods include micromechanical separation method, epitaxial method and heating SiC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y40/00
Inventor 林起浪
Owner FUZHOU UNIV
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