Ammonium octamolybdate flame-retardant fiber as well as preparation method and application thereof

The invention provides an ammonium octamolybdate flame-retardant fiber as well as a preparation method and application thereof, and a spinning solution of the ammonium octamolybdate flame-retardant fiber is prepared from an NMMO solution, ammonium octamolybdate, magnesium hydroxide, lauryl sodium sulfate and wood pulp cellulose. The preparation method comprises three steps of preparing a flame retardant mother solution, preparing a spinning solution and spinning. The ammonium octamolybdate flame-retardant fiber can be used for preparing a flame-retardant fabric. According to the ammonium octamolybdate flame-retardant fiber disclosed by the invention, the nanoscale ammonium octamolybdate and the nanoscale magnesium hydroxide are used as flame retardants, so that the consumption of the flame retardants can be reduced and the loss of mechanical properties of the fiber can be reduced on the premise of ensuring the flame retardant property, and the spinnability of the fiber in a spinning process is ensured. 本发明提供了