Preparation method of bioactive carbon fiber

Abstract

The invention discloses a preparation method of a bioactive carbon fiber. The preparation method comprises the following steps: (1) adopting a multiple temperature zone gradient heating method to pre-oxidize polyacrylonitrile fibers for 30 to 150 minutes at a temperature of 150 to 300 DEG C; (2) adopting a multiple temperature zone gradient heating method, subjecting the pre-oxidized polyacrylonitrile fibers to a carbonization treatment for 10 to 30 minutes at a temperature of 600 to 1300 DEG C; and (3) through an active modification method, subjecting the carbonized fibers to a surface activation treatment for 3 to 10 minutes to obtain the bioactive carbon fiber. An active modification method is used to carry out a surface activation treatment on carbonized fibers, the furnace body cannot be damaged easily, the continuous surface treatment of active carbon fiber can be realized; a large amount of acidic or alkaline active groups are generated on the fiber surface, the hydrophilic property is enhanced, the absorption performance is strengthened, the provided bioactive carbon fiber can be used to process sewage; in the presence of a catalyst, multiple organic pollutants in sewage can be chemically adsorbed by the bioactive carbon fiber, and the water quality is improved.

Description

technical field [0001] The invention relates to the technical field of activated carbon materials, in particular to a preparation method of bioactive carbon fibers. Background technique [0002] Due to the advantages of large surface area and strong adsorption capacity, activated carbon materials are widely used in the fields of air pollution control, sewage purification and energy recovery, and activated carbon fiber is the third generation of activated carbon materials after powdered activated carbon and granular activated carbon. Traditional activated carbon materials have disadvantages such as low absorption rate, insufficient recovery, and high cost. Compared with them, activated carbon fibers have high strength, acid and alkali resistance, good electrical conductivity and chemical stability, and good purification effect on sewage. [0003] Polyacrylonitrile (PAN)-based activated carbon fiber is obtained by pre-oxidation, carbonization and activation of polyacrylonitril...

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Problems solved by technology

[0005] In the above-mentioned patent, when the pre-oxidized fiber is activated, water vapor is used as a catalyst, and the water vapor is prone to oxidation at a temperature of 700-800 ° C, which will damage the furnace body and reduce the life of the carbonization furnace; at the same time, the surface of the fiber is During the treatment, the fibers are treated with hydrogen peroxide and ammonia solution under ultrasonic waves for 10 to 60 minutes. The treatment process takes too long, and continuous treatment of activated carbon fibers cannot be realized.