| 摘要 |
A preparation method for high-strength polyacrylonitrile nano composite fibres. The preparation method comprises the following steps: step I, adding graphene into an organic solvent or a mixed solution of the organic solvent and water, uniformly dispersing, then adding a homopolymer or copolymer of acrylonitrile, and dissolving at 30°C to 120°C to obtain a spinning solution; or directly mixing the homopolymer or copolymer of the acrylonitrile and the graphene to obtain a mixture, then dispersing the mixture in a concentrated acid or an aqueous solution of an inorganic salt to obtain a spinning solution; step II, filtering and defoaming the spinning solution at 20°C to 80°C, and spraying the spinning solution to a coagulating bath at -40°C to 5°C through a spinneret plate to form nascent fibres; and step III, extracting, drying, thermally stretching and thermally stereotyping the nascent fibres to obtain the high-strength polyacrylonitrile nano composite fibres. The method is simple in production process, high in production performance and easy for realizing the industrialized mass production. |
