Method for preparing hollow structure carbon fibers by using cotton as raw material

A carbon fiber and raw material technology, applied in the field of preparing hollow structure carbon fiber, can solve problems such as environmental hazards, and achieve the effects of high adsorption capacity, convenient operation and simple equipment

Inactive Publication Date: 2013-07-24
王滨 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Toxic waste gas and harmful waste water produced in industrial production cause serious harm to the environment

Method used

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  • Method for preparing hollow structure carbon fibers by using cotton as raw material
  • Method for preparing hollow structure carbon fibers by using cotton as raw material
  • Method for preparing hollow structure carbon fibers by using cotton as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The cotton raw material without any treatment was directly placed in a tube furnace, under the protection of nitrogen, the gas flow rate was 1mL / min, and the heating rate was 2°C / min, and carbonized at a high temperature of 400°C for 1 hour. After the reaction, cool down to room temperature under the protection of nitrogen to prepare hollow carbon fibers. Depend on figure 1 It can be seen that the carbon fiber made from cotton after carbonization at 400°C has a complete structure, and the fiber length is about 1 to 5 cm. Depend on figure 2 It can be seen that the contact angle formed by water droplets on the surface of carbon fibers is >150°, while oil droplets are completely absorbed on the surface. Therefore, the prepared carbon fibers are superhydrophobic and lipophilic. Depend on image 3 It can be seen that the fiber material (CCFs-400) prepared at 400 °C is mainly composed of amorphous carbon and graphite grains. Depend on Figure 4 It can be seen that the ...

Embodiment 2

[0031] The cotton raw material without any treatment was directly placed in a tube furnace, under the protection of nitrogen, the gas flow rate was 1mL / min, and the heating rate was 2°C / min, and carbonized at a high temperature of 600°C for 1 hour. After the reaction, cool down to room temperature under the protection of nitrogen to prepare hollow carbon fibers. Depend on Figure 5 It can be seen that the carbon fibers prepared from cotton after carbonization at 600 °C are still structurally intact. Depend on Figure 6 It can be seen that the carbon fiber has a hollow structure with a pore size of about 4.6 μm. This novel structure can greatly improve the adsorption performance of carbon fibers, and it is convenient to recover the adsorbed substances from the micropores. Depend on image 3 It can be seen that the fiber material (CCFs-600) prepared at 600 °C is mainly composed of amorphous carbon and graphite grains. Depend on Figure 4 It can be seen that the adsorption ...

Embodiment 3

[0033] The cotton raw material without any treatment is directly placed in a tube furnace, under the protection of nitrogen, the gas flow rate is 2mL / min, and the heating rate is 2°C / min, and it is carbonized at a high temperature of 800°C for 1 hour. After the reaction, cool down to room temperature under the protection of nitrogen to prepare hollow carbon fibers. Depend on Figure 7 It can be seen that the carbon fibers prepared from cotton after carbonization at 800 °C are still structurally intact. Depend on Figure 8 It can be seen that the carbon fiber has a hollow structure with a pore size of about 3.8 μm. Depend on image 3 It can be seen that the fiber material (CCFs-800) prepared at 800°C is mainly composed of amorphous carbon and graphite grains, and the peak at 2θ=44.36° is clearly visible, indicating that the content of graphite is increasing. Depend on Figure 4 It can be seen that the adsorption capacities of the prepared carbon fiber to peanut oil, ethylene...

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Abstract

The present invention relates to a method for preparing hollow structure carbon fibers by using cotton as a raw material. According to the method, cotton with no treatment is directly placed in a tubular furnace; in the protection of inert gas, temperature programming is performed to achieve a temperature of 400-1800 DEG C; carbonization is performed for 0.5-5 h at the high temperature; and after completing the reaction, cooling is performed to achieve a room temperature in the protection of inert gas to obtain the hollow structure carbon fibers. The hollow structure carbon fibers have the following characteristics that: the hollow structure carbon fibers have a hollow structure, a fiber length is about 1-5 cm, a pore size is about 3-6 mum, and the hollow structure carbon fibers have super-hydrophobic lipophilicity and high adsorption capacity. The method has characteristics of convenient operation and simple equipment, wherein the nature renewable resources are adopted as the raw materials, the preparation cost is low, the method is suitable for large-scale industrial production, and the obtained hollow structure carbon fibers can be used as an efficient adsorbent for crude oil leakage, sewage treatments, air purification and other fields.

Description

technical field [0001] The invention relates to carbon fibers, in particular to a method for preparing hollow structural carbon fibers using cotton as a raw material. Background technique [0002] Carbon fiber has the characteristics of high strength, low density, good thermal stability (inert atmosphere is stable to 2000 ℃, slow oxidation at 400 ℃ in air), strong chemical inertness (acid and alkali resistance), high conductivity, etc. It is a unique mechanical and thermal and new materials with electrical properties. At present, it has been widely used in the fields of energy, environmental protection and aerospace. In recent years, the problem of environmental pollution has attracted more and more attention. Crude oil spill accidents at sea have caused serious damage to the ecosystem, the arbitrary discharge of petrochemical and industrial production wastewater has polluted fresh water resources, and indoor volatile organic compounds (VOCs), such as formaldehyde, are har...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/16B01J20/20B01J20/30C02F1/28B01D53/02
Inventor 王滨吕晓莹郭洪范
Owner 王滨
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