Biological activated carbon fibe, ecological carbon fiber composite comprising the same and preparation method thereof
A fiber composite material, biological activated carbon technology, applied in the direction of chemical characteristics of fibers, chemical instruments and methods, synthetic resin layered products, etc. Due to the low strength of carbon fiber, it is difficult to store sludge, easy to clean and maintain, and has good compatibility.
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[0027] In a typical implementation of the present invention, a method for preparing bioactive carbon fibers comprises the following steps: gradually heating polyacrylonitrile fibers, viscose fibers or pitch fibers to 200°C at a rate of 3-5°C / min. After ~300°C, carry out pre-oxidation treatment for 50-150 minutes to form pre-oxidized wire; gradually heat up the pre-oxidized wire to 700-800°C at a rate of 10-30°C / min under nitrogen atmosphere, and then use water vapor As an activator, carbonization and activation treatment is performed for 30 to 90 minutes to form bioactive carbon fibers. In the preparation process, water vapor is used as an activator, and no accelerator and catalyst are used in the whole process to avoid secondary pollution.
[0028] The aforementioned bioactive carbon fibers use polyacrylonitrile fibers, viscose fibers or pitch fibers as carbon fiber raw materials, and these raw materials can exhibit excellent performance after being treated by the preparation...
Embodiment 1
[0055] Raw material: polyacrylonitrile fiber (production company: Changzhou Bangguan Chemical Co., Ltd.).
[0056] Preparation:
[0057] After the polyacrylonitrile fiber is gradually heated up to 200°C at a rate of 3°C / min, it is pre-oxidized for 50 minutes to form a pre-oxidized filament; the pre-oxidized filament is gradually heated up at a rate of 10°C / min in a nitrogen atmosphere After reaching 700°C, use water vapor as an activating agent to perform carbonization and activation treatment for 30 minutes to form bioactive carbon fibers.
[0058] The biologically active carbon fibers are treated with ultrasonic waves with a frequency of 50KHz for 10 minutes in a mixed solution of a 30% hydrogen peroxide solution and a 25% ammonia solution with a volume ratio of 1:2 for surface active treatment. , forming sample 1.
Embodiment 2
[0060] Raw material: viscose fiber (manufacturing company: Shandong Hailong Co., Ltd.).
[0061] Preparation:
[0062] After the viscose fiber is gradually heated to 300°C at a rate of 5°C / min, a pre-oxidation treatment is carried out for 150 minutes to form a pre-oxidized filament; the pre-oxidized filament is gradually heated at a rate of 30°C / min under a nitrogen atmosphere. After heating up to 800°C, use water vapor as an activator to conduct carbonization and activation treatment for 90 minutes to form bioactive carbon fibers.
[0063] The bioactive carbon fiber is treated with a frequency of 100KHz in a hydrogen peroxide solution with a concentration of 30% for 60 minutes to perform the first surface active treatment; In 28% ammonia solution, ultrasonic wave with a frequency of 100KHz was used for 60 minutes to perform the second surface active treatment to form sample 2.
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