High-strength flame-retardant MXene/phosphorylated cellulose filament composite film and preparation method thereof

The invention discloses a high-strength flame-retardant MXene/phosphorylated cellulose filament composite film and a preparation method thereof, and belongs to the field of high polymer materials. The preparation method comprises the following steps: uniformly dispersing phosphorylated cellulose nanofibrils in an aqueous solution, then adding chitosan and MXene, uniformly mixing, and drying to obtain the composite film. MXene is utilized, chitosan is introduced, the flame retardant property and thermal stability of the phosphorylated cellulose nanofibrils are enhanced, meanwhile, interaction between MXene and the phosphorylated cellulose nanofibrils can be enhanced, and the mechanical property of the composite film can be improved in combination with the nanometer enhancement effect of MXene. The phosphorylated cellulose fibril film synergistically modified by MXene and chitosan prepared by the invention not only has excellent flame retardant property, but also has greatly improved mechanical properties. In t