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A kind of bamboo-shaped carbon fiber and preparation method thereof

A carbon fiber and bamboo-like technology, which is applied in the field of carbon fiber materials and its preparation, can solve the problems of difficult control of carbon fiber structure dispersion uniformity, uncontrollable carbon fiber microstructure and morphology, and difficulty in realizing industrialized production, etc., and achieves low cost and bamboo joints. The effect of clear structure and uniform graphite dispersion

Active Publication Date: 2020-12-15
LINYI UNIVERSITY
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Problems solved by technology

The dispersion uniformity of the carbon fiber structure prepared by the existing preparation process is not easy to control, the degree of graphitization is low, and it is difficult to realize industrial production
[0004] The Chinese invention patent application submitted by the inventor with the publication number CN106865538A discloses a carbon nanowire material and its preparation method. The method uses ammonia water and terephthalic acid to react at room temperature to prepare a precursor carbon source, and after carbonization A kind of carbon nanowire is obtained by processing, but the method provided by the invention has the following problems: the reaction rate of ammonia water is too fast due to the large amount of ammonia water, the microstructure of carbon fiber is uncontrollable, the structure is not uniform, the prepared carbon chain is relatively short, and there is no Test its electrical properties, etc.

Method used

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  • A kind of bamboo-shaped carbon fiber and preparation method thereof
  • A kind of bamboo-shaped carbon fiber and preparation method thereof
  • A kind of bamboo-shaped carbon fiber and preparation method thereof

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preparation example Construction

[0030] In the embodiment of this specification, the preparation method of bamboo-shaped carbon fiber comprises:

[0031] Preparation of precursor carbon source: dissolve benzoic acid and urea in a solvent, put them in a reaction kettle, transfer the reaction kettle to an oven for heating, and after the reaction, cool, centrifuge, wash and dry to obtain a precursor carbon source;

[0032] Carbonization: Put the precursor carbon source in a quartz boat, gradually heat up to the carbonization temperature, carry out carbonization under a constant temperature inert atmosphere, cool to room temperature, collect the solid phase, and obtain bamboo-shaped carbon fibers.

[0033] In the above method, the heating temperature is 60-140°C, preferably 80-120°C, more preferably 80°C. Wherein, the heating time is 5-7 hours, preferably 6 hours, and naturally cool after heating; in one embodiment, centrifugation is required before washing; the drying temperature is preferably 60°C. Benzoic aci...

Embodiment 1

[0035] Dissolve 1mmol of benzoic acid and 2mmol of urea in 20ml of N,N-dimethylformamide and 20ml of absolute ethanol respectively. After ultrasonically dissolving fully, mix them evenly and transfer them to the reactor. Transfer the reactor to 80°C After reacting in an oven for 6 hours, the reaction was stopped, cooled naturally to room temperature, centrifuged, washed, and dried at 60°C to obtain a precursor carbon source. Then put the precursor carbon source into the quartz boat, raise the temperature to 800°C at a rate of 5°C / min, and carbonize it in a nitrogen atmosphere at a constant temperature for 4 hours, then stop the reaction, cool naturally to room temperature, collect the solid phase, and obtain a bamboo-shaped carbon fiber.

[0036] figure 1 and figure 2 Respectively, the transmission electron microscope of the obtained bamboo-shaped carbon fiber at a resolution of 10nm Figure I and TEM Figure II . Among them, the diameter of the carbon chain is about 30n...

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Abstract

The invention provides bamboo-joint-shaped carbon fibers and a preparation method thereof. The method comprises the steps of preparing a precursor carbon source by utilizing organic acid and an alkalisource and carbonizing, wherein the feeding mol ratio of the organic acid to the alkali source is 1 to 2, the organic acid is benzoic acid and the alkali source is urea. The invention further provides the bamboo-joint-shaped carbon fibers prepared by the method; and the diameter of a carbon chain is about 30nm and the length is greater than 10mu m. According to the preparation method of the bamboo-joint-shaped carbon fibers, provided by the invention, a reaction speed and a morphological structure of the carbon fibers are controlled very well; a preparation technology is simple, raw materialsare easy to obtain and the cost is low, so that the preparation method is suitable for industrial production; the prepared bamboo-joint-shaped carbon fibers have uniformly-distributed graphite and have a graded pore structure; a bamboo-joint-shaped structure is clear, the carbon chain is longer, the graphitization degree is high, the energy storage performance is good and the cycle life is long;and the bamboo-joint-shaped carbon fibers have a wide application prospect in the fields of flexible energy storage equipment, wearable electronic devices and biomedicines.

Description

technical field [0001] The invention relates to a carbon fiber material and a preparation method thereof, in particular to a bamboo-shaped carbon fiber and a preparation method thereof. Background technique [0002] Carbon fiber is a new type of fiber material with high strength and high modulus fiber containing more than 95% carbon. Carbon fiber is lighter than metal aluminum, but its strength is higher than that of steel, and it has the characteristics of corrosion resistance and high modulus. It is an important material in national defense and civilian applications. It not only has the inherent intrinsic characteristics of carbon materials, but also has the softness and processability of textile fibers. It is a new generation of reinforcing fibers. The field has broad application prospects. Studies have shown that the performance of carbon fiber materials is related to its structure, and there are certain differences in the electrical properties of carbon fiber material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/14H01G2/00
CPCD01F9/14H01G2/00
Inventor 胡晓炜胡建华胡尊富郑秀文
Owner LINYI UNIVERSITY
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