The invention relates to a manufacturing method of ternary ammonification modified T400-stage 12K carbon
fiber.
Acrylonitrile,
itaconic acid and 2-acrylamido-2-methylpropanesulfonic acid are taken as copolymerization monomers for performing
polymerization of a ternary free radical solution, ammonification modification is performed on an obtained
spinning solution and then
spinning is performed through a 12K
spinning nozzle. 12K raw
yarn is prepared by performing solidification,
water washing, hot water drafting, oiling and
drying on a tow, and then performing steam drafting and
heat setting treatment. Pre-oxidation and
carbonization treatment are further performed on the obtained raw
yarn to prepare the carbon
fiber. According to the manufacturing method disclosed by the invention, the non-toxic
solid powder raw materials are taken as the copolymerization monomers, the ammonification modification treatment is performed on the spinning solution, the hydrophilicity and the draftability of the spinning solution obtained by the method are obviously improved, and the compactness, the orientation degree and the
crystallinity of the obtained raw
yarn after the spinning process are also obviously improved. After the pre-oxidation treatment of the raw yarn, gradient
carbonization is performed in a low-temperature
carbonization furnace at the temperature of 400-750 DEG C, drafting treatment is further performed, and the prepared carbon
fiber has the advantages of high mechanical properties and
strong binding force.