▎ 摘　　要

NOVELTY - Preparing graphene antibacterial functional yarn comprises (S1) heating specific amount of phosphorus pentoxide and potassium persulfate in a vacuum drying oven, (S2) injecting the cooled phosphorus pentoxide and potassium persulfate into the reaction kettle, (S3) completely dissolving phosphorus pentoxide and potassium persulfate in highly concentrated sulfuric acid, (S4) raising the temperature to 100°C through a water bath or an oil bath to dissociate the sulfur-containing groups on graphite oxide to obtain a graphene oxide solution, (S5) adding specific amount of anhydrous calcium chloride to the graphene solution concentrated by centrifugation, (S6) spraying the graphene oxide solution capable of wet spinning into the coagulation bath, and (S7) blending the modified graphene fiber, dispersant, negative ion powder and common fibers to obtain graphene composite blended yarn. USE - The method is useful for preparing graphene antibacterial functional yarn, which is useful in electronic and optical field, energy storage, electro-catalysis application, chemical sensor and functional textile. ADVANTAGE - By introducing calcium ion and oxygen-containing functional group in the graphene fiber, forming coordination bond on the graphene fiber to enhance graphene fiber layer distance becomes more compact, so that the surface of the fiber graphene a certain wrinkle shape, which is more beneficial for containing the nanometre material, when spinning, the composite nano-grade powder negative ion compounded, the nano-negative ion powder is blended spinning, and the antibacterial rate of the Escherichia coliand Staphylococcus aureushave good bacteriostatic effect, the bacterium effect is obvious, it has obvious negative ion-bacterial property. DETAILED DESCRIPTION - Preparing graphene antibacterial functional yarn comprises (S1) heating specific amount of phosphorus pentoxide and potassium persulfate in a vacuum drying oven for a period of time, and then cooling under an inert environment, (S2) injecting the cooled phosphorus pentoxide and potassium persulfate into the reaction kettle and uniformly mixing, injecting specific amount of highly concentrated sulfuric acid, and continuing stirring for 35-45 minutes, (S3) completely dissolving phosphorus pentoxide and potassium persulfate in highly concentrated sulfuric acid, adding specific amount of high-purity graphite and continuing stirring for 2-3 hours, then after static, performing high-speed centrifugation and drying processes in sequence, gradually oxidizing the graphite edge to form oxygen-containing functional groups to obtain graphite oxide solution, (S4) raising the temperature to 100°C through a water bath or an oil bath to dissociate the sulfur-containing groups on graphite oxide to obtain a graphene oxide solution, (S5) adding specific amount of anhydrous calcium chloride to the graphene solution concentrated by centrifugation, uniformly mixing, and injecting it into the reaction kettle containing the mixed solution, (S6) spraying the graphene oxide solution capable of wet spinning into the coagulation bath under the fast rotating flow state to obtain the modified graphene fiber, and (S7) blending the modified graphene fiber, dispersant, negative ion powder and common fibers to obtain graphene composite blended yarn.