Preparation method of high-strength carbon fiber
A high-strength carbon fiber and carbon nanotube technology, which is applied in the chemical characteristics of fibers, chemical post-processing of rayon, textiles and papermaking, etc., can solve the problems of inconvenient operation, complicated equipment and high cost, and achieve short processing time and simple operation. , the effect of high production efficiency
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Embodiment 1
[0026] Mix 0.05 parts by weight of carboxylated multi-armed carbon nanotubes (Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, length 10-30 μm, inner diameter 10-20 nm, outer diameter 5-10 nm) and 100 parts by weight of solvent dimethyl sulfoxide, use The ultrasonic cell pulverizer was ultrasonicated for 3 hours with a power of 300w; 0.05 parts by weight of the polymer thickener polyacrylonitrile (the degree of polymerization was 88,000 and the particle size was 230nm-250nm) was added to the obtained mixed solution, and an ultrasonic cell pulverizer was used for Power 300w ultrasonic for 2 hours; immerse the oxidized polyacrylonitrile pre-oxidized fiber into the obtained mixed solution at a solid-to-liquid ratio of 1:3 and let it stand for 1 h, and form a thickness of 200 nm on the surface of the oxidized polyacrylonitrile pre-oxidized fiber The coating is then carbonized at 1000 degrees Celsius to obtain high-strength carbon fibers. figure 1 The mass ratio...
Embodiment 2
[0028] 0.5 parts by weight of carboxylated multi-armed carbon nanotubes (Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, length 10-30 μm, inner diameter 10-20 nm, outer diameter 5-10 nm) and 100 parts by weight of solvent N,N-dimethylformamide 1.5 hours by ultrasonic cell disintegrator with power of 600w; add 0.05 weight part of polymer thickener polyvinyl alcohol (polymerization degree is 88,000, particle size is 230nm-250nm) in the obtained mixed solution, and ultrasonically The cell crusher was sonicated for 1 hour at a power of 600w; the oxidized polyacrylonitrile pre-oxidized fibers were immersed in the obtained mixed solution at a solid-to-liquid ratio of 1:2 and left for 2 hours to form a thickness on the pre-oxidized spinning fibers The coating is 200nm, and then carbonized at 1000 degrees Celsius to obtain high-strength carbon fibers. figure 2 It is a field emission electron microscope image of 10,000 times the magnification of the carbon fiber a...
Embodiment 3
[0030] Mix 0.05 parts by weight of carboxylated multi-armed carbon nanotubes (Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, 10-30 μm in length, 10-20 nm in inner diameter, 5-10 nm in outer diameter) with 100 parts by weight of solvent water, and use an ultrasonic cell pulverizer. Ultrasonic for 2 hours with a power of 500w; add 5 parts by weight of a polymer thickener polyvinyl alcohol (the degree of polymerization is 88,000, and the particle size is 230nm-250nm) in the obtained mixed solution. ; The obtained mixed solution is sprayed to the surface of the oxidized polyacrylonitrile pre-oxidized fiber under the conditions of a spray voltage of 80kv, a spray distance of 25cm and a spray gun rotation speed of 2800r / min to form a coating with a thickness of 300nm, and then after 1000 Carbonization in degrees Celsius to obtain high-strength carbon fibers. image 3 It is a field emission electron microscope image of the carbon fiber with a magnification of 10...
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