▎ 摘　　要

NOVELTY - The preparation method of modified Miscanthus floridulus fibers involves: soaking villous leaves of Miscanthus floridulus in 15-25% sodium hydroxide solution for 15-30 minutes, cleaning with clear water, adjusting the pH to 6.3-6.8 using a hydrochloric acid solution, adding 0.1-3% of pectinase and performing enzymolysis for 12-24 hours to obtain pretreated Miscanthus floridulus sibiricus fibers; washing the fibers with clear water, and drying at 50-60 degrees Celsius; putting the dried Miscanthus floridulus fibers in an ozone environment for oxidation treatment for 10-15 hours, then adding epoxy bromopropane, adding sodium hydroxide as a catalyst, and reacting for 10-18 hours at 80plus minus2 degrees Celsius to obtain epoxy Miscanthus floridulus fibers; mixing carboxylated graphene and the epoxy fibers, and carrying out ultrasonic treatment for 1-3 hours at 30plus minus2 degrees Celsius to obtain modified Miscanthus floridulus fibers; and drying the modified Miscanthus floridulus fiber at 70-90 degrees Celsius. USE - Preparation method of modified Miscanthus floridulus fibers used as a filling material for down jackets. ADVANTAGE - After the modification treatment, the thermal insulation effect and bulkiness of the fiber is improved, and it can be added to down jacket products in proportion to reduce the amount of down and thus reduce the cost. The modification method is simple, the implementation cost is low, and the prepared modified fiber has good bulkiness and thermal insulation, and also provides a new type of natural fiber material DESCRIPTION OF DRAWING(S) - The drawing shows a comparison graph of Miscanthus floridulus fiber and kapok fiber.