Through the reaction of erythritol with phosphoric acid and urea,erythritol phosphate ammonium(EPA)is synthesized and used as a new type of halogen-free flame retardant.Using melamine as a catalyst,EPA is attached onto Lyocell fibers by impregnation and baking process to produce EPA-Lyocell flame retardant fibers.The limiting oxygen index(LOI)of EPA-Lyocell reaches 45.3％,which is significantly higher than 17％for pure Lyocell fibers,showing obvious flame retardant effect.After 20 cycles of water washing,the LOI of EPA-Lyocell fibers is 39.2％.Even after washing with a sodium carbonate solution of 20 g/L for 20 times,the LOI can still reach 34.3％,making it flame retardant Lyocell fibers with excellent durability.
NETL
NSTL
维普
万方数据
